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.

Lining Material,Furnace Lining Material,Lining Material Refractory,Refractory Material,Refractorty Products

Lining Material

This company lining material produces the lining material is called "mixed sand" for short. This product is the main refractories of the medium frequency induction furnace used by the small steel enterprises. Its effect is in leading position