High Alumina EPS Insulating Firebrick,Refractory Brick

High Alumina EPS Insulating Firebrick

This king of products is sintered mainly with supper-fine bauxite charlotte and proper additive by a method of EPS ignition loss. Their main advantages include high intensity, low thermal conductivity, excellent thermal stability, very small reheat linear change, outstands erosion and corrosion resistance etc. They are an ideal kind of energy conserving products, which can be widely used as lining or insulating layers of various industrial furnaces and kilns in metallurgical industry, machine building industry, ceramic industry, chemical industry, chemical industry, etc. Recommended to use below 1400℃.

 

Ceramic Fiber Blanket,Refractory Fibre Products

Ceramic Fiber Blanket

Introduction:

which can be widely used for industry kilns, and has good saving power effect. According to content, we develope four diferent kinds of pruducts, they are 1000 °C common aluminum silicate, 1200 °C high purity, 1200 °C high alumia and 1300 °C Zirconia bearing alumina silicate, and it also can be made according to your requirements.

 

Acid Proof Brick,Firebrick

Acid Proof Brick

Acid proof brick and plate are widely applied in petroleum, chemical industry, medicine-making, food, paper-making, chemical fertilizer, agriculture, pesticide, chemical fibre, textile industry, smelting, and power-generating plants etc., and anti-corrosion inner liner of tower, pool;pot, sinks, what’s more, it also plays leading anti-corrosion role in waste water treatment and open air working grounds. Acid-resistant ceramics can resist most media except hydrogen-arc acid, thermal alkali and thick alkali, and has better anti-corrosion effect in moist chlorasalt,hydrochloric acid etc. and any alkali under normal temperature. 

Monoblock Stopper,Refractory Material

Monoblock Stopper

According to the quality of the materials, the monoblock stopper of our company can be classified into aluminum carbon, aluminum-zirconium carbon and aluminum-magnesia carbon. This product enjoys performances including favorable slag resistance, strong fracture resistance at normal temperature, fine liquid steel resistance and washing erosion, to ensure reliability in the course of product usage.

Tundish Well Block,Tundish Refractory

Tundish Well Block

Yilong, supplies nozzles in a number of different compositions to best suit the operating conditions of the steel ladle. Nozzles are available in alumina qualities (with and without carbon additions, zirconia additions, and/or chrome additions) to best resist the slag chemistry. Nozzles are either pressed or pre-cast depending on the composition.
 

Calcium Silicate Board,Calcium Silicate Products

Calcium Silicate Board

calcium silicate board is used in industries including steel plants, cement clinker kiln, heat and power stations, foundries both ferrous and non-ferrous, cement producers, Aleris , ceramics, coke plants, incinerators, renewable energy, chemical works, sugar refineries and petrochemical industry. It is sell well in the world and we won a lot of trust both at home and abroad .

Ladle Slide Gate ,Slide Gate Plate

 Ladle Slide Gate 

Alumina-carbon slide gates are characterized by high strength, erosion resistance and good thermal shock resistance. They are preferred products for large/middle ladle and continuous casting tundish. They can meet the needs of different steel grades.

Ladle Nozzle,Nozzle Refractory

Ladle Nozzle

Introduction:

Ladle Nozzle are made from corundum, bauxite, flake graphite, antioxidant and phenolic resin formed on heavy duty presses in harden steel or carbide die by using white fused alumina. To obtain maximum packing density, nozzles are fired at extremely high temperature in order to increase corrosion resistance to metal and slag the fired nozzles are further processed.

Semi-graphitic Carbon Block,Brick Block

Semi-graphitic Carbon Block

Introduction

It is mad of high temperature' electrical calcined anthracite as main a material, medium temperate pitch as binder, through forming, high temperature baking, final precision machining. It features good thermal conductivity and alkaline resistance. It is economic and practical, and mainly applied for blast furnace bottom.

 

Zirconium Sizing Nozzle,Nozzle Refractory

Zirconium Sizing Nozzle 

The company developed Zirconium sizing nozzle, specially used in small billet caster tundish no plug stem gating system,and it is more suitable for small billet cc, nozzle adopt the Special high-quality selection of raw materials, reasonable structure, strong erosion resistance, small change of the nozzle diameter and stable speed in the casting process, according to the customers’ request, we can supply inlaying, compound and different types of nozzle products.

 

Acid Proof Brick,Firebrick

Acid Proof Brick

Introduction:

Acid proof brick and plate are widely applied in petroleum, chemical industry, medicine-making, food, paper-making, chemical fertilizer, agriculture, pesticide, chemical fibre, textile industry, smelting, and power-generating plants etc., and anti-corrosion inner liner of tower, pool; pot, sinks, what’s more, it also plays leading anti-corrosion role in waste water treatment and open air working grounds. Acid-resistant ceramics can resist most media except hydrogen-arc acid, thermal alkali and thick alkali, and has better anti-corrosion effect in moist chlorasalt, hydrochloric acid etc. and any alkali under normal temperature.

Tundish Slag Dam,Tundish Refractory

Tundish Slag Dam

Introduction

The products are characterized by their high strength, good resistance to carrion and thermal shock and long service life. It can be effectively stabilization molten steel enter to mould, promote non-metallic inclusions in molten steel float, and improve the quality of steel.

Easily to be Eroded Parts of AOD Lining

1. One part is AOD furnace tuyere, the reasons are as follows.

First, air enters the furnace from side gas blower gun will scour the refractories lining seriously during the process of falling down. Therefore, the area over the tuyere is eroded heavily.

Second, tuyere part is in the center of carbon oxygen reaction area whose temperature is very high( some part can reach 1700-1800℃), so the tuyere part is seriously eroded.

Third, the tuyere is at the lateral part of furnace bottom, bears much mechanical static pressure, easily to be eroded.

2. One part is the side of tapping.

Because the iron add hole and tapping hole are at the same side, so the tapping side is less eroded, the erosion is mainly created by molten steel’s scouring. In addition, deflection of top lance also affects the erosion.

Electric Furnace Prefabricated Part,Tundish Refractory

Electric Furnace Prefabricated Part 

Introduction

The essential thing with all prefab units is that their quality must be the same as the rest of the refractory structure. This demands innovative moulding techniques and strictly controlled use of monoliths, modern processing equipment and quality management and control. In their own two tunnel kilns and two batch kilns Gouda Refractories is also able to dry and fire the Prefab department's products at up to 1,680 degrees, so that a ceramic bond is created while baking.

 

Light-weight Insulating Castables for Heating Furnace,Insulating Castable

Light-weight Insulating Castables for Heating Furnace

This product mainly takes multi-hole clinker, floating ball, vermiculite and perlite as principal raw materials, and it is characterized by high strength, good heat insulation property and thermal shock resistance. It can be used as the heat-insulation castable on parts like furnace wall, top and bottom of various steel rolling heating furnaces.

Carbon free Brick,Low Carbon Brick

Carbon free Brick

Introduction:

Low carbon magnesia carbon brick using with crystal magnesite, fused corundum, fused spinel, high purity and ultrafine graphite and nano composite antioxidant as raw materials, which are used for ladle slag line. Low carbon and carbon-free corundum spinel bricks are used for ladle lining and bottom. It can realize ladle low carbon and carbon-free to meet the needs of high grade and ultra-clean steel. The products are characterized by corrosion resistance, penetration resistance, erosion resistance, spalling resistance and good integrity, to meet the need of complete refining ladle. It is the leading level in the domestic.

 

Refining Slag,Refractory Material

 Refining Slag

Refining Slag is a new auxiliary material of steel making  that developed by our company to meet the requirement of low-sulphur stel. I t was melted from many kinds of material by electric furnace in high temperature that makes out the calcium aluminates, which mainly includes 7Al₂O₃ and 12Cao in more than 90%, and their activity coefficient is more than 70. The product has the following features: quick melted, high activity degree, quick speed of slag making, early appearing of white slag, high degree of fluidity after being melted, large quantity of offspring of deoxidation and desulphurization in molten steel can be absorbed, refining time can be shortened, and cost of steel making can be decreased. With all the above features, the harmful impurity in molten steel can be reduced and the component in molten steel can be purified.

Method of use

1. Added with flow of steel when rapping

2. Or added when position of refining furnace is measured

3. Or added according to technology.

Magnesia Carbon Brick,Refractory Brick

Magnesia Carbon Brick

Introduction:

Magnesia carbon brick series used for the electric furnace are made by adoption of fused magnetite, high-purity magnesium sand and graphite as principal raw material, through high-pressure molding and low-temperature treatment. This product is mainly used for electric furnace lining, which enjoys advantages including high temperature resistance strength, corrosion and spalling resistance. According to the smelting conditions and the kind of smelting steel, different brands magnesia carbon bricks are available.Magnesia-carbon bricks are resin bonded bricks containing high-purity fused and or sintered magnesia and flake graphite as their main ingredients.

 

Calcium Silicate Pipe,Calcium Silicate Products

Calcium Silicate Pipe

Introduction

calcium silicate product is used in industries including steel plants, cement clinker kiln, heat and power stations, foundries both ferrous and non-ferrous, cement producers, Aleris , ceramics, coke plants, incinerators, renewable energy, chemical works, sugar refineries and petrochemical industry. It is sell well in the world and we won a lot of trust both at home and abroad .

 

Ladle Permeable Brick,Refractory Brick

Ladle Permeable Brick

Ladle permeable brick has been in the leading position in domestic and abroad over years. We have developed the series of corundum, chromium corundum, low silicon chromium corundum and corundum spinel one after another. They can be designed and produced types of straight hole, directional slit, directional labyrinth, girth shape and interior and exterior integral split etc according to users’ request.  Permeable flow rate of products can be designed upon customers’ request and can be adjusted in a wide range. The blowing opening rate is high.

High Alumina EPS insulating Firebrick

High Alumina EPS insulating Firebrick

Introduction:

This series of products are sintered mainly with supper-fine bauxite chamotte, and proper additive by a method of EPS ignition loss, Their main advantages include high intensity, low thermal conductivity, excellent thermal stability, very small reheat linear change, outstands erosion and corrosion resistance etc.

 

Ladle Nozzle,Nozzle Refractory

Ladle Nozzle

Introduction

Ladle Nozzle are made from corundum, bauxite, flake graphite, antioxidant and phenolic resin formed on heavy duty presses in harden steel or carbide die by using white fused alumina. To obtain maximum packing density, nozzles are fired at extremely high temperature in order to increase corrosion resistance to metal and slag the fired nozzles are further processed.

Steel Flow Initiator,Refractory Castable

Steel Flow Initiator

Steel flow initiator is a kind of ladle slid nozzle filler which is successfully developed by our company in recent years, results show that ladle castables success rate of automatic start casting can reach above 95 percent. There is no metallic inclusion in ingot surface, is a kind of ideal ladle slide nozzle filler.
Steel flow initiator contains metal mixture whose weight is heavier and melting point is lower than molten steel. Before pouring we put it into upper nozzle, using it to burning and causing the molten steel within the upper nozzle will not be solidified, to achieve the purpose of automatic start casting and avoid the problem of ingot inclusions.

Ceramic Fiber Paper,Ceramic Fiber

Ceramic Fiber Paper

Introduction

1.Building material industry,kiln,heating equipment and the inwall of high-temperature pipe line
2.Chemical industrial high temperature of reaction equipment inwall
3.Power plant ,gas turbine engine and heat insulation of unclear power
4.The fire proof of high-rise building
5.Used to make gasket
6.High-temperature filter material

 

Acid Proof Brick,FireBrick

Acid Proof Brick

Introduction:

Acid proof brick and plate are widely applied in petroleum, chemical industry, medicine-making, food, paper-making, chemical fertilizer, agriculture, pesticide, chemical fibre, textile industry, smelting, and power-generating plants etc., and anti-corrosion inner liner of tower, pool; pot, sinks, what’s more, it also plays leading anti-corrosion role in waste water treatment and open air working grounds. Acid-resistant ceramics can resist most media except hydrogen-arc acid, thermal alkali and thick alkali, and has better anti-corrosion effect in moist chlorasalt, hydrochloric acid etc. and any alkali under normal temperature.

 

Analysis on Magnesia Calcium Brick Used for AOD Lining

According to the effects of AOD smelting on refractories and the high required standard about molten stainless steel, the selected refractories should meet the following requirements.

1.) Excellent resistance to high temperature.

2.) Excellent corrosion resistance to slag.

3.) Excellent thermal and vibration stability.

4.) Excellent volume stability.

5.) Can purify molten steel.

Magnesia calcium brick, mainly made from magnesium sand and synthesized magnesium dolomite sand, is a kind of alkaline refractories and contains CaO. The melting points of MgO and CaO in synthesized sand are both high, it’s 2825℃ and 2620℃, their eutectic point is as high as 2370℃. When chemical reactions happen between CaO and slag, a compound with high molten point will be easily produced, such as dicalcium silicate whose molten point is 2130℃, and whose molten point is 1900℃. Those minerals with high molten points make magnesia calcium brick possess excellent resistance to high temperature.

CaO in magnesia calcium brick has good thermodynamic property stability; CaO has good resistance to acid slag. Therefore magnesia calcium brick not only has excellent resistance to high alkaline slag but also has excellent resistance to acid slag.

Magnesia calciumrefractories are the best choice for desulfurization and dephosphorization of molten steel.

Plastic Refractory Mortar for Heating Furnace

Plastic Refractory Mortar for Heating Furnace

The plastic ramming mix is characterized by good volume stability, excellent thermal shock resistance and easy construction, which can be installed on site without water addition during stirring. The mix is used plastic refractories for roof and wall of various rolling heating furnace mainly by ramming.
 

Semi-graphitic Carbon Block,Fire Brick

Semi-graphitic Carbon Block

Introduction:

It is mad of high temperature' electrical calcined anthracite as main a material, medium temperate pitch as binder, through forming, high temperature baking, final precision machining. It features good thermal conductivity and alkaline resistance. It is economic and practical, and mainly applied for blast furnace bottom.

 

Electric Furnace Gunning Mix ,Refractory Material

Electric Furnace Gunning Mix 

Introduction

Electric furnace gunning mix with magnesia based and magnesia-calcium based material, binder and sintering agent, is characterized by high bonding strength, strong corrosion resistance and non-spalling. When hot repairing temperature is higher than 1000℃, hot repairing effect is good and adhesion rate is higher than 85%.

 

Electric Furnace Gunning Mix ,Refractory Material

Electric Furnace Gunning Mix 

Introduction

Electric furnace gunning mix with magnesia based and magnesia-calcium based material, binder and sintering agent, is characterized by high bonding strength, strong corrosion resistance and non-spalling. When hot repairing temperature is higher than 1000℃, hot repairing effect is good and adhesion rate is higher than 85%.

 

Sliding Mechanism,Ladle & Tundish Refractory

Sliding Mechanism

• Name: Sliding Mechanism
• Products Id: a23
• Advantage: Good stability, high self-regulating sensitivity, have double-sided tight pin.
• Delivery Time: 30-60 Days
• Products Used:

Clay Insulating Bricks,Firebrick

Clay Insulating Bricks

Introduction:

Produced with unique advanced technology, the clay and high alumina heat insulating bricks possess the characteristics of high intensity for pressure and good thermal shock stability. The use of the bricks can reduce the heat capacity of kiln walls and promote the heat efficiency of kilns. The product is applicable for constructing industrial kilns and inner lining of kilns.

 

Checker Brick ,High Alumina Checker Brick

Checker Brick 

 

Introduction

High Aluminum checker brick include high refractoriness, large volume density, high intensity and high refractoriness under load. They also have good creeping in high-temperature, excellent regenerative capability.

 

Effects of Operating Methods on AOD Furnace Lining

         During the process of steel making, the operating methods have great influence on AOD furnace lining.

The motion path of gas come from side gas gun is like a parabola. There is a highest point of the parabola, after the point, the gas begins to fall down, and then the lining will be scoured heavily by the gas. Therefore, during the blowing, the furnace body should lean at an angle of 6-8°.

Besides, controlling gas pressure and blowing amount of inner and outer gas gun is quite important for stable operation. Improper control, abnormal growing of umbrella shaped things because of overcooling, and rise of back pressure are essential elements for control. As fire point is too close to the side wall, it will lead to overheat of place around tuyere, and finally bring about trumpet-shaped melting loss of refractories.

Metering nozzle,Nozzle Refractory

Metering nozzle

The Zr metering nozzle manufactured by this company is specially used for the tundish gating system without plug stick in the small square-base continuous casting machine, and it is more suitable for multi-thread and small square-base continuous casting machine. All nozzles adopt special-type and high-quality refined raw materials with reasonable structure and strong erosion resistance. In the entire course of pouring, there is little change in diameter of the nozzle with stable speed. Nozzles of the mosaic type, combined type and entire difference type can also be provided as required by customers.

Light-weight Insulating Castables for Heating Furnace

Light-weight Insulating Castables for Heating Furnace

 

Introduction

Our company manufactures and supplies superior quality range of Insulating Castable that is a light weight refractory concrete. We provide pre-cast and fired castable at industry leading prices and these are widely used as castable for walls, roof and bottom of steel rolling heating furnace.

Magnesia Alumina Carbon Brick and Alumina Magnesia Carbon Brick

Magnesia Alumina Carbon Brick and Alumina Magnesia Carbon Brick

Introduction:

Alumina Magnesia Carbon Bricks is made from high quality bauxite, corundum and fused magnesia. It is formulated with very high purity alumina and magnesia.

 

Refractory Fiber Felt

Refractory Fiber Felt

Refractory fiber felt, castables and refractory pouring products are one of company. They are widely used in industry kilns and have gotten well power saving effect. The standards of refractory insulating fiber products are as below.
 

Covering Agent,Refractory Material

Covering Agent

Introduction

The covering agent using advanced methods of composite carbon and non-carbon, which make refractoriness increase, and also bring other characteristics such as long insulation watery, good spread ability, low thermal conductivity , and net rate is more than 90% normally. What’s more, the dust is small and not sticky to wall. Especially M2R, MG what is Magnesium with high basicity and Calcium Magnesium matrix cove, which are applicable to alkaline Magnesium with high basicity and calcium ladle lining. When casting ultra low carbon clean steel, the M2R and MG can be effective to absorb impurity substance, and can improve stability of continous steel slag to ensure quality of steel.

 

Semi-graphitic Carbon Block

Semi-graphitic Carbon Block

Introduction:

It is mad of high temperature' electrical calcined anthracite as main a material, medium temperate pitch as binder, through forming, high temperature baking, final precision machining. It features good thermal conductivity and alkaline resistance. It is economic and practical, and mainly applied for blast furnace bottom.

Zirconium Sizing Nozzle ,Nozzle Refractory

 Zirconium Sizing Nozzle 

The company developed Zirconium sizing nozzle, specially used in small billet caster tundish no plug stem gating system,and it is more suitable for small billet cc, nozzle adopt the Special high-quality selection of raw materials, reasonable structure, strong erosion resistance, small change of the nozzle diameter and stable speed in the casting process, according to the customers’ request, we can supply inlaying, compound and different types of nozzle products. 

Calcium Silicate Pipe,Calcium Silicate Products

Calcium Silicate Pipe

Introduction:

calcium silicate product is used in industries including steel plants, cement clinker kiln, heat and power stations, foundries both ferrous and non-ferrous, cement producers, Aleris , ceramics, coke plants, incinerators, renewable energy, chemical works, sugar refineries and petrochemical industry. It is sell well in the world and we won a lot of trust both at home and abroad .

 

Monoblock Stopper

Monoblock Stopper

Introduction

Yilong’s  monoblock stopper rods are made from alumina-carbon in isostatic presses with zirconia inserts and/or magnesia tips as necessary for optimum performance. Argon channels are likewise available to suit a particular operation. Stopper rods are all X-rayed before shipment to eliminate flaws and cracks. Stopper rods can be supplied bare or with mounting hardware as required.

 

Tundish Impact Plate

Tundish Impact Plate

The tundish impact plate is used for liquid steel induction area of tundish, and the nozzle well block is used to install the nozzle, its mark, material quality and physical chemical indexes are similar to the slag dam. Users can make rational combination to the slag dam, impact plate and nozzle well block based on the smelting conditions and service conditions of tundish.

Submerged Entry Nozzle

Submerged Entry Nozzle

Introduction:

Yilong submerged entry nozzle  are isostatically pressed from alumina-graphite with zirconia inserts and magnesia seats as required. Argon channels are available too. These pieces are 100% X-ray tested for flaws and cracks prior to shipment. These SENs are engineered to provide maximum life at minimal cost.

 

Clay,High Alumina insulating bricks

Clay,High Alumina insulating bricks

Produced with unique advanced technology, the clay and high alumina heat insulating bricks possess the characteristics of high intensity for pressure and good thermal shock stability. The use of the bricks can reduce the heat capacity of kiln walls and promote the heat efficiency of kilns. The product is applicable for constructing industrial kilns and inner lining of kilns. 

Influences of Smelting Technics on AOD Furnace Lining

Influences of Smelting Technics on AOD Furnace Lining

1. High Furnace Temperature

2. Long Smelting Cycle

3. Great Temperature Change

And the reasons are as follows.

Research shows that when the temperature of the molten pool is above 1700 ℃, the erosion rate of the lining will be doubled for every time of temperature increases by 50 ℃. When AOD furnace is smelting stainless steel, the molten pool temperature is above 1750 ℃ during decarburization phase, with a long smelting cycle of stainless steel, the woking time of lining refractories is relatively long, and thus speed up the refractories erosion.

Because of the intermittence of producing, the lining temperature will fall to 1300℃ after molten steel flows out. Before pouring into semi molten steel, there is still protecting gas blowed in from air pressure gun, then the temperature of lining around will fall to under 850℃. During the process of smelting, exothermic reaction will emerge between oxygen mixed gas entered from tuyere and elements in molten steel, and this will lead to relatively higher temperature of tuyere area, and other parts are at lower temperature. Plenty of cold metal will be added into the molten pool during stainless steel refining, so it will result in rapid temperature decline of slag line.

The above several situations of abrupt increase and decline of temperature will easily lead to exfoliation of lining, finally reduce the furnace service life.

Ceramic Fiber Paper

Ceramic Fiber Paper

 

Introduction:

1.Building material industry,kiln,heating equipment and the inwall of high-temperature pipe line
2.Chemical industrial high temperature of reaction equipment inwall
3.Power plant ,gas turbine engine and heat insulation of unclear power
4.The fire proof of high-rise building
5.Used to make gasket
6.High-temperature filter material

Slide Gate Fire Clay,Slide Gate Fire Clay

Slide Gate Fire Clay

 

Introduction

Sliding plate fire clay has characteristics of good bonding and high refractoriness. It is the ideal material for filling sliding aperture.

High Alumina EPS Insulating Firebrick

High Alumina EPS Insulating Firebrick

This king of products is sintered mainly with supper-fine bauxite charlotte and proper additive by a method of EPS ignition loss. Their main advantages include high intensity, low thermal conductivity, excellent thermal stability, very small reheat linear change, outstands erosion and corrosion resistance etc. They are an ideal kind of energy conserving products, which can be widely used as lining or insulating layers of various industrial furnaces and kilns in metallurgical industry, machine building industry, ceramic industry, chemical industry, chemical industry, etc. Recommended to use below 1400℃.

Aluminum Carbon Long Nozzle

Aluminum Carbon Long Nozzle

Introduction

Based on function categories, the long nozzles manufactured by our company are classified into preheating nozzle, non-preheating nozzle, argon blowing nozzle and not argon blowing nozzle, and based on material quality, nozzles mainly classified into aluminum carbon, aluminum-zirconium carbon and aluminum-magnesia carbon. This product is provided with good liquid steel washing resistance performance and liquid steel erosion performance in the course of use, which can effectively prevent oxidation of air to liquid steel and its spatter.

 

 

Magnesia Carbon Brick

Magnesia Carbon Brick

Magnesia carbon brick series used for the electric furnace are made by adoption of fused magnesite, high-purity magnesium sand and graphite as principal raw material, through high-pressure molding and low-temperature treatment. This product is mainly used for electric furnace lining, which enjoys advantages including high temperature resistance strength, corrosion and spalling resistance. According to the smelting conditions and the kind of smelting steel, different brands magnesia carbon bricks are available.

Medium Frequency Induction Furnace Drying Tamp Mass

Medium Frequency Induction Furnace Drying Tamp Mass

Introduction:

The product is characterized by high corrosion and erosion resistance against molten steel and slag, dense sintered layer, long service life, low consumption of per ton steel, easy construction and repairing, and energy saving.

Submerged Entry Nozzle,Nozzle Refractory

Submerged Entry Nozzle

Introduction

Yilong SEN are isostatically pressed from alumina-graphite with zirconia inserts and magnesia seats as required. Argon channels are available too. These pieces are 100% X-ray tested for flaws and cracks prior to shipment. These SENs are engineered to provide maximum life at minimal cost.

 

Calcium Silicate Board,Calcium Silicate Products

Calcium Silicate Board

 

Introduction:

calcium silicate board is used in industries including steel plants, cement clinker kiln, heat and power stations, foundries both ferrous and non-ferrous, cement producers, Aleris , ceramics, coke plants, incinerators, renewable energy, chemical works, sugar refineries and petrochemical industry. It is sell well in the world and we won a lot of trust both at home and abroad.

 

Ladle Slide Gate

Ladle Slide Gate 

Alumina-carbon slide gates are characterized by high strength, erosion resistance and good thermal shock resistance. They are preferred products for large/middle ladle and continuous casting tundish. They can meet the needs of different steel grades.

Calcium Silicate Pipe

Calcium Silicate Pipe

 

Introduction:

calcium silicate product is used in industries including steel plants, cement clinker kiln, heat and power stations, foundries both ferrous and non-ferrous, cement producers, Aleris , ceramics, coke plants, incinerators, renewable energy, chemical works, sugar refineries and petrochemical industry. It is sell well in the world and we won a lot of trust both at home and abroad .

High Alumina EPS insulating Firebrick

High Alumina EPS insulating Firebrick

Introduction

This series of products are sintered mainly with supper-fine bauxite chamotte, and proper additive by a method of EPS ignition loss, Their main advantages include high intensity, low thermal conductivity, excellent thermal stability, very small reheat linear change, outstands erosion and corrosion resistance etc.

Sliding Mechanism Refractory

Sliding Mechanism Refractory

• Name: Sliding Mechanism Refractory
• Products Id: a24
• Advantage: Good stability, high self-regulating sensitivity, have double-sided tight pin.
• Delivery Time: 30-60 Days

Calcium Silicate Board

Calcium Silicate Board

Introduction:

calcium silicate board is used in industries including steel plants, cement clinker kiln, heat and power stations, foundries both ferrous and non-ferrous, cement producers, Aleris , ceramics, coke plants, incinerators, renewable energy, chemical works, sugar refineries and petrochemical industry. It is sell well in the world and we won a lot of trust both at home and abroad.

 

Bottom Frame &Skid Platform Brick for Heating Furnace

Bottom Frame &Skid Platform Brick for Heating Furnace

Introduction

Skid and platform brick are with brown corundum and high grade bauxite as raw materials, using low cement technology and additive. Casting moulding and baking at low temperature, or casting on-site are both available. Characterized by high strength, water and corrosion resistance, they are used for isothermal bed and furnace doorframe of continuous heating furnace and have good effect.

Light-weight Insulating Castables for Heating Furnace

 Light-weight Insulating Castables for Heating Furnace

This product mainly takes multi-hole clinker, floating ball, vermiculite and perlite as principal raw materials, and it is characterized by high strength, good heat insulation property and thermal shock resistance. It can be used as the heat-insulation castable on parts like furnace wall, top and bottom of various steel rolling heating furnaces.

Ladle Permeable Brick

Ladle Permeable Brick 

Introduction

Adopting tabular alumina, emery, chromium oxide green and magnesia alumina spinel as main raw materials, using cement as binder. Numerous designs are available based around high purity refractory materials. They can be designed and produced types of straight hole, directional slit, directional labyrinth, girth shape and interior and exterior integral split etc according to users’ request. With precisely formed slot/channel for the optimum gas flow rates and stirring efficiency

Tundish Slag Dam

Tundish Slag Dam

The tundish slag dam is the auxiliary product of the continuous casting tundish, which is beneficial to separate slag, prevent slag into the crystallizer and improve quality of liquid steel. This product features in erosion resistance, good high-temperature property, high heat stability and long service life.

A Brief Introduction of AOD Refractories

Now magnesia-chromite brick, magnesia-dolomite brick, dolomite brick are the main products used for AOD lining.

There are natural dolomite at good quality in Europe, there calcined dolomite brick to are used generally to construct AOD lining. And magnesia-dolomite brick added with zirconia is used for tuyere, calcined dolomite brick with magnesia is used for slag line. For steel-tapping spout, magensia carbon materials and magnesia dolomo carbon brick are widely used.

The corrosion resistance ability of magnesia chrome brick is high for high alkaline slag with magnesia and low alkaline residue with chrome, it’s the best choice for furnace whose slag composite changes are big, and it is widely used in Japan and America. While because magnesia chrome brick is expensive and chrome can do damage to the environment, so it is used less and less in the recent years. Only a small amount of small converter which doesn’ t work continuously use magnesia chrome brick.

Compared with the past magnesia chrome brick, dolomite brick is cheaper, but its serving is also shorter.

Nowadays becausemagnesia clacia brick has good high-temperature resistance, slagging resistance and thermal shock resistance, and also it can purify molten steel. So it is gradually used in jumbo furnace which work continuouslly, and a trend of taking place of other bricks seems to happen.

Notes About Fire Bricks Laying During Furnace Construction

1. Construct the furnace either by one kind of brick or by two kinds of brick, the required matching percentage of brick in theory may differ from the actual percentage affected by distortion of cylinder. So there is no need to use bricks totally as the theoretical required amount while constructing the furnace. It’s a key point to lay the big side of brick close to the cylinder when doing the construction, and the bricks should be laid straightly and there had better no gaps between each two bricks. Fill the gaps and distortion with mortar, the repair seam line should not be too hard in case of breaking of bricks.

2. Abandon the twisted bricks which are out of distortion standard, making sure that the bricks are tightly bonded and no looseness. While construct the furnace by bricklaying machine, the upper brick especially alkaline brick can not be given too much pressure, because alkaline brick’s strength at normal temperature is relatively lower. Avoid bricks broken by uneven compression, so that to avoid kiln body falling off while working.

3. While laying alkaline bricks, watering or grouting the brick upper surface is prohibited. The well up cement mortar should be cleaned before it hardens.

4. Construct the furnace strictly according to each brick matching method to avoid distortion of brick block and kiln body working out of balance, furthermore to avoid affecting working cycle.

5. During the construction, check carefully and immediately both annular flatness and axial flatness according to the datum line in every circle and section. Parallel vertical seam line with furnace axis, parallel annular seam lines with each other, and make the parallel annular seam line vertical with the furnace axis. If the furnace body distorts or the bricks are irregular, adjust the body by steel plate and the bricks by cement mortar. The steel plates should just fit with the bricks (the length and height of steel plate should be 5mm smaller than those of brick).

6. When finish semicircle construction of the furnace, firstly check the deviation of vertical seam line with datum line and annular seam line with datum line, then lay one tier or two tiers of bricks, set up the mandrel and turn the furnace by 90⁰. Construct the left half furnace on the other side, set up another mandrel while finishing one section. Turn the furnace after the mortar hardens.

Generality High Alumina Brick and Clay Brick

Generality High Alumina Brick and Clay Brick

Specific Application:Used to construct some parts or all parts of blast furnace, blast stove, coke oven, heating furnace, submerged arc furnace, lime kiln, rotary kiln, glass furnace, carbon baking furnace, etc.

Introduction:

Our High Alumina Bricks and Fireclay range is available in different varieties/shapes as per the specifications given by the clients. We provide High Alumina Bricks that are highly resistant and durable without causing any environmental hazards maintaining High standards are made from a variety of raw materials having different properties. Shapes of the High Alumina Bricks are made as per the drawings and measurements provided by the clients and only high grade fireclay and raw materials are used in their manufacturing.

 

Ladle Nozzle Well Block,Nozzle Refractory

Ladle Nozzle Well Block

 

Introduction

The series of well blocks for nozzles are made from high-purity, high-density, high-strength materials. Based on different materials, they have corundum, magnesia carbon and alumina spinel carbon.

Refractory Castables for Working Lining of Heating

Refractory Castables for Working Lining of Heating 

The castables, characterized by qualified flint clay, superfine aluminuma, fused alumina, sintered mullite, etc material and combined with micro mist, several additives. Its main character is good volume stability, good thermal shock resistance and high strength, widely used for heating furnace’s roof and wall of various types of steel rolling by casting.

Magnesia Carbon Brick

Magnesia Carbon Brick

 

Introduction

Magnesia carbon brick series used for the electric furnace are made by adoption of fused magnetite, high-purity magnesium sand and graphite as principal raw material, through high-pressure molding and low-temperature treatment. This product is mainly used for electric furnace lining, which enjoys advantages including high temperature resistance strength, corrosion and spalling resistance. According to the smelting conditions and the kind of smelting steel, different brands magnesia carbon bricks are available. Magnesia-carbon bricks are resin bonded bricks containing high-purity fused and or sintered magnesia and flake graphite as their main ingredients.

 

Steel Flow Initiator,Refractory Material,Refractory Products

Steel Flow Initiator

Steel flow initiator is a kind of ladle slid nozzle filler which is successfully developed by our company in recent years, results show that ladle castables success rate of automatic start casting can reach above 95 percent. There is no metallic inclusion in ingot surface, is a kind of ideal ladle slide nozzle filler.
Steel flow initiator contains metal mixture whose weight is heavier and melting point is lower than molten steel. Before pouring we put it into upper nozzle, using it to burning and causing the molten steel within the upper nozzle will not be solidified, to achieve the purpose of automatic start casting and avoid the problem of ingot inclusions.

Magnesia Carbon Brick,Refractory Brick

Magnesia Carbon Brick

Magnesia carbon brick series used for the electric furnace are made by adoption of fused magnetite, high-purity magnesium sand and graphite as principal raw material, through high-pressure molding and low-temperature treatment. This product is mainly used for electric furnace lining, which enjoys advantages including high temperature resistance strength, corrosion and spalling resistance. According to the smelting conditions and the kind of smelting steel, different brands magnesia carbon bricks are available. Magnesia-carbon bricks are resin bonded bricks containing high-purity fused and or sintered magnesia and flake graphite as their main ingredients. 

Special Refractory Slurry,Refractory Mortar,Refractory Material,Refractory Concerete

Special Refractory Slurry

Dry Vibration Mix

Dry Vibration Mix 

This product is mainly used for tundish lining, which is the 3rd generation of high-tech product following insulation board and tundish coating, and this product is characterized by convenient construction, without baking and long service life.

 

Electric Furnace Gunning Mix

Electric Furnace Gunning Mix 

Electric furnace gunning mix with magnesia based and magnesia-calcium based material, binder and sintering agent, is characterized by high bonding strength, strong corrosion resistance and non-spalling. When hot repairing temperature is higher than 1000℃, hot repairing effect is good and adhesion rate is higher than 85%. 

Checker Brick ,Refractory Brick

Checker Brick 

 

High Aluminum checker brick include high refractoriness, large volume density, high intensity and high refractoriness under load. They also have good creeping in high-temperature, excellent regenerative capability. 

Semi-graphitic Carbon Block

Semi-graphitic Carbon Block

• Details

It is mad of high temperature' electrical calcined anthracite as main a material, medium temperate pitch as binder, through forming, high temperature baking, final precision machining.

It features good thermal conductivity and alkaline resistance.

It is economic and practical, and mainly applied for blast furnace bottom.

Mullite Insulating Firebrick

Mullite Insulating Firebrick

This series of products adopt high-purity raw materials and unique technology to furthest avoid impact of impurities and structure defect to product performance, featuring in extreme excellent high-temperature volume stability, thermal shock resistance, high strength, low heat conductivity coefficient, with extensive adaptability to various furnace types and environment conditions. This product can be used as furnace lining (away from erosion of fusion liquid) and insulating layer in many industries like metallurgy, machinery, ceramics and chemicals, which is an ideal energy-saving product.

Construction of Refractory Castable

During the construction of refractory castable, special attention should be paid on pin welding, asphalt brushing, stirring of castable with water, making and fixing of mould, vibration and ramming of castable, demoulding, sizes’ and measuring points’ accuracy, etc. http://www.yilongrefractory.comDo construction strictly as material manufacturer and boiler works required.

1. Installation of Pin and Claw Nails

Reinstall the pins missing for any reason and the pins in the area of heating surface composite melding junction before hydraulic pressure. Lengthen and reinstall the pins properly in coal mouth, material return mouth and upper inflection point of air duct furnace so that meets the required density of pins. Brush all the pre-buried metal parts and claw nails with asphalt paint (thickness > 1mm) or cover them with combustibles before casting.

2. Dosing and Stirring of Castable & Water

The dosing of castable and water should be done strictly as the instructions of material manufacturer. The water should be clean, such as drinking water, ph 6-8. The mixer should be clean forced action mixer, and clean it for the next time using. Pay attention on the adding order of castable and water and its stirring time, adding water freely and prolonging of stirring time are forbidden. The water and castable should be mixed evenly and stirred till smooth. Carry away the mixed casatble immediately after stirring, the castable poured out from stirring tank is disallowed to be poured into the tank and stirred again. Clean the tank after every construction for the next using, record the amount of water and castable, and the stirring time.

3. Checking Before Making Template

Check carefully whether the pin, hook nail and strutting part conform to the drawing, whether all the re-welding and is done and firm, whether the temporary metal parts have been cut off. Check whether the metal parts which should be brushed with asphalt paint meet the requirement, whether the casting place is clean, any other unrelated materials are forbidden to appear. For easy demoulding, a thin tier of partition (such as used oil) can be brushed in the mould. There can not be gaps between each two templates to avoid castable leaking out, so that also convenient for mould releasing. The refractory castable should be used up in 30 minutes after stirring, and should be casted to the required thickness in 1 time. Ram the castable till tight. For the too thick parts, cast tier by tier, while casting the upper tier, vibration bar can not touch the lower casted tier.

The Ways to Protect Refractories and Improve Service Life of Lalde

The MgO in slag is eroded usually by furnace lining while making steel. In the process of smelting, the slag and refractory materials will get touched; MgO concentration in slag should almost reach saturation. There is a close relationship between the content of saturated MgO and CaO/SiO_2. For slag with low alkalinity (CaO/SiO2<2.0), the higher the proportion of FeO is, the lower proportion of saturated MgO. When FeO content is low and saturated MgO content is high, the slag will erode more refractories. While for slag with high alkalinity (CaO/SiO₂ >2.0), the saturated MgO content will not be seriously affected by the FeO content, what’s more the slag will not erode much more refractories. Therefore, improve slag alkalinity can strongly protect refractories.

The service life of ladle is directly influenced by refining time, so it is important to improve steelmaking technology so that to shorten smelting time.

The service life of ladle will be reduced by 3-5 heats once shut down, so to achieve efficient production, the key is shortening smelting cycle. On the premise of using advanced technology to guarantee the best steel quality and the lowest total consumption, shorten the smelting cycle to the minimum, improve equipment and shorten shut down time.

Checker Brick ,High Alumina Checker Brick,Refractory Brick,Firebrick

Checker Brick

Introduction

High Aluminum checker brick include high refractoriness, large volume density, high intensity and high refractoriness under load. They also have good creeping in high-temperature, excellent regenerative capability.