Correct methods to select good quality refractories with low cost

      High temperature industrial development cannot do without refractory material function, especially in the iron and steel, nonferrous metals, glass, ceramics, cement, petrochemical, machinery, boilers, light industry, electric power, military and other fields, is the basic material of an operation and technology industrial production, with each field of industry continue to increase, the demand quantity of refractory products is also gradually increasing, which requires every manufacturer increase production, while at the same time ensuring the production quality of the product is the most critical, it is also the fundamental in all areas of normal operation. For how to choose the right refractory is introduced in following four aspects:

1 according to the structure, working characteristics and motion conditions of the furnace and the analysis of material damage reasons, in order to choose the appropriate refractory. Accurate understanding and grasp the temperature changes of all parts of the material, carefully observe the material to prevent by all kinds of destructive effects, such as: high temperature molten metal erosion.

2 familiar with the material chemical composition and physical, work performance, so as to give full play to the characteristics of material.

3 so that all parts of the furnace material reasonable match, in order to avoid the mutual damage at the same time between material, but also take measures to ensure that the service life of the whole.

4 basic principles in satisfying the conditions above, to solve the resource and cost as much as possible. Can choose prices and transport costs low material, at the same time, vigorously develop the recycling, reduce the cost of.

We Xinmi Changxin refractories plant convenient transportation, rich in resources, is the base for the production of refractory materials ideal, high-quality refractory raw materials base believe refractory products can produce satisfactory.

Ladle Gunning Mix,Ladle Refractory,Gunning Mix,Mix Poeder,Refractory Product,Refractory,Refractories

Ladle Gunning Mix

According to the gunning characteristics of gunning mixes and considering the destructibility of slag lines and easily worn parts of ladles, our company specially developed HT series of gunning mixes with the unique binding agent and additives. 

Details of knowledge should pay attention to the selection of refractory materials

     Selection of refractory materials needs to pay attention to the details of knowledge. High temperature industrial development cannot do without refractory material function, especially in the iron and steel, nonferrous metals, glass, ceramics, cement, petrochemical, machinery, boilers, light industry, electric power, military and other fields, is the basic material of an operation and technology industrial production, with each field of industry continue to increase, the demand quantity of refractory products is also gradually increasing, which requires every manufacturer increase the output, while at the same time ensuring the production quality of the product is the most critical, it is also the fundamental in all areas of normal operation. How to choose the appropriate refractory should be for the majority of the use of units? This is we have been very concerned about the problem; here we take a look at it.

1 according to the structure, working characteristics and motion conditions of the furnace and the analysis of material damage reasons, in order to choose the appropriate refractory. Accurate understanding and grasp the temperature changes of all parts of the material, carefully observe the material to prevent by all kinds of destructive effects, such as: high temperature molten metal erosion.

2 familiar with the material chemical composition and physical, work performance, so as to give full play to the characteristics of material.

3 so that all parts of the furnace material reasonable match, in order to avoid the mutual damage at the same time between material, but also take measures to ensure that the service life of the whole.

4 basic principles in satisfying the conditions above, to solve the resource and cost as much as possible. Can choose prices and transport costs low material, at the same time, vigorously develop the recycling, reduce the cost of.

The four question above is each big unit using refractory selection needs to be considered, which can ensure the quality of products and reduce the cost, is a very good selection principle.

Modulation principle of slurry used for refractory brick

 Brickwork with refractory slurry should follow the following principles:
    (1) to deal with all kinds of refractory slurry pre experiment and pre laying brick front, confirm the bonding time, different mud initial setting time, consistency and water;
    (2) Modulation of different mud to use different instruments, and timely cleaning;
    (3) Modulation is not homogeneous slurry to use clean water, water should be accurate weighing, blending uniformly, adjusted with the use. Have good hydraulicity and modulation of hard mud shall not add water use, has the initial setting of mud may not continue to use the;
    (4) Modulation with phosphate mud to ensure material time trapped provisions, with the use of post set, well modulated mud arbitrarily diluted with water. This kind of mud for corrosive shall not be in direct contact with the metal shell.

    We take the zero defect management idea, through the production process from beginning to end. All the time since, in the pursuit of perfect quality at the same time, also constantly improve the service system, concerned about each of your needs, to provide professional sales and technical service for you.

Using requirements of boiler with refractory material

     Boiler burner band main properties of refractory material should have included slag resistance, high strength, wear resistance, thermal stability, thermal conductivity and other properties. The traditional refractory belt mainly used chrome refractory ramming material, but because of the domestic high quality chrome resource scarcity, therefore is the main use of silicon carbide ramming material, silicon carbide high alumina coating material, high aluminum phosphate can be plastic, high temperature expansion plastic.

Of which the first two kinds of materials of high prices, but the long service life, good performance, and then two kinds of material price is low, but performance in general, and short service life. Therefore in the cyclone furnace liquid slag furnace and should not be used in high phosphate refractory plastic or ramming material, to avoid peeling or cracks in use in the production, so as to enhance the slag resistance of material and reduce the repair frequency.

High-temperature micro expansion refractory plastic and super 3000 water clay refractory performance fairly, has shown some advantages in the application to the wall pipe and boiler furnace top. But this kind of material in its solidification time is long, easy to dry shrinkage crack, thus for the construction and maintenance of a great deal of trouble. At the same time the supplier quality there is a certain fluctuation, sometimes refractoriness and normal temperature strength of less than 1580 degrees and 981N/cm2.

Refractory material how to use can have anti damage ability

     How to use Refractory let it has anti damage ability? The development of matching with refractory material according to the clinker rotary kiln each work with the different mining conditions, in a targeted manner to configure different anti damage of refractory materials, and considering the basic matching problem of each work tape lining service life, reduce maintenance times to stop the kiln, each work with lining, reach namely damage resistance independent and phase the purpose of matching cycle. Lining material preheating zone selection of good chemical stability, alkali erosion leaf wax stone brick and strong, the high siliceous raw pyrophyllite with low alkali, alkali resistant bricks made of this raw material, whether or not to burn the Chengdu firing with alkali resistance strong, but the strength is high, nearly doubled than clay brick life.

       The completion of the industrial experiment stage in Krivoy Rog coking plants, coke oven masonry and recommended room three thermal repair methods: flame gunning; using oxygen to the ceramic welding; using the exothermic material (heating material) to repair. The process principle of common: with the help of heat generated to form a protective layer on the surface of refractory composite masonry mending surface.

Flame gunning method of flame gunning refractory products, powder particles melt in the liquid or gaseous fuel flame, and was sent to the surface to be repaired. At this point the masonry was nozzle flame supplementary heating, so using this method may not have special restrictions on temperature is put forward in this paper, and can adopt refractory powder cheaper to obtain high-quality gunning layer. Principle of ceramic welding method is adding to the material of strong oxidant (exothermic material) - aluminum and silicon. Wind transport by means of oxygen jet flame method, oxidant and refractory powder to the surface to be repaired.

Dry Vibration Mix ,Firebrick,Fire Brick,Refractory Brick,Refractory Firebrick

 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.

Refractory materials commonly used in neutral and alkaline induction furnace

Neutral and alkaline lining is used only for induction furnace capacity of less than 10 tons. The cost is much higher than the acidic lining lining, so must meet the smelting efficiency is very high to the economy. Neutral and alkali furnace refractory material is sexy:

(1) Sintered magnesia. The erosion of the sintered magnesia against molten metal and slag is very good, and high refractoriness, disadvantage is the contraction occurred two times during sintering, resulting in cracks and voids. Risk also contained the fully sintered, affect the elastic. Cause of crack;

(2) Fused magnesia. Electric volume stability of fused magnesia is good, but expensive than sintered magnesia.

(3) Magnesia - alumina - spinel. Magnesia - alumina - spinel due to volume expansion appears in the formation of spinel, so as to compensate the shrinkage of magnesia. Degree of expansion by the number and shape of corundum and mineralizing agent control. (4) Chrome magnesia - alumina - spinel. Chrome magnesia - alumina - spinel besides the advantages of the spinel, also has good thermal stability;

(5) The calcium oxide crystallization. Calcium oxide crystallization created favorable conditions for dephosphorization and desulfurization, but easy to crack, and cooling easily. In addition, the stove temperature will absorb moisture, so it is in danger of hydration. The crystallization of calcium oxide lining can neither be ramming material, also can not be made into bricks used in induction furnace.

Formation of smelting furnace slag layer

     Infiltration of molten state in refractories copper matte with good mobility. Due to the surface in the reaction tower refractory lining is covered with a layer of dense with magnetic iron oxide for hanging slag layer is mainly composed of, so he struck the wall surface matte does not directly penetrate into the brick body, but first of all along the silicate slag channel infiltration within the material and the interaction and slag, slag at different depth generate Cu or Cu2O material.

    Reaction tower wall surface slag although direct intrusion effectively prevents the copper matte, but did not completely eliminate the erosion caused by the matte of lining. Through the slag layer, there are still a small number of matte can penetrate through, and then along the brick body pores or cracks penetrate within the capillary channel brick. Because of the more close to the brick center, oxygen potential is higher, so into the brick body after the copper matte is prone to oxidation reaction. After reaction, the generated Cu2O exists between the lining the main crystal and the matrix, and no penetration into the other grains.

    Molten copper oxide (CuO-Cu2O at 1140 DEG C when the low total soluble) will cause the increase of permeability brick thermal conductivity, the resulting expansion of strong diathermy, lining spalling and, in which Cu is oxidized to CuO, the volume expansion of 75%; oxidized into Cu2O, volume increased by 64%. Therefore, from the microscopic structure, corrosion of matte on the reaction tower lining is mainly for the chemical structure of permeability, copper matte and the resulting stress reaction.

The reasons of refractory brick collapse in the process of use

For refractory brick, we may not feel strange. With the progress of society, the application of refractory brick is more and more widely. Refractory brick appear collapse phenomenon in the actual using, so what causes it; following the Xinmi Changxing refractory material factory is simple to give you introduced the refractory brick collapse reason:
1, red hot refractory brick suddenly quenched with water will rupture and fall.
2, oven heating stage , rate master is not strict, temperature rise too fast, causing severe dehydration, masonry and damage due to expansion and shrinkage.
3, building stove masonry to expand stay insufficient, cracked and falling temperature after expansion.
4, the ash accumulation system, most of the metal salt corrosion of the refractory brick, embitterment of vanadium and nickel will penetrate into the refractory brick falling off caused by.
5 when the liquefied gas, heating, air flow ratio is undeserved, cause furnace blasting and vibration split off.
6, poor air flow furnace, flame directly flush furnace brick, the furnace brick thinning after a serious fall.
7, the operation course lifting furnace temperature pressure to balance, it is strictly prohibited to excessive temperature and pressure, avoid the sharp rise in the drop, because the temperature of each layer of brick always lags behind the furnace temperature, the more rely on the outer temperature changes more slowly, if drastic changes in a short time the temperature of the furnace, brick layer between refractory brick and brick joints rupture is caused due to temperature difference is too large to generate huge internal stress. Furnace pressure will cause the sudden change, refractory brick for each layer of gas pressure can't balance, pressure increasing and destroyed, may cause the whole refractory lining of furnace temperature fluctuation pressure serious collapse.

Application of mullite materials in rotary kiln

       Mullite aluminum silicate formation at high temperature minerals, the magnetization roasting rotary kiln lower process temperature, process characteristics of resistance, corrosion resistance, thermal shock resistance, mullite SiC composite prefabricated brick with mullite materials and silicon carbide material composition and mullite SiC castable method of composite masonry, at the same time refractory materials at high temperature with different proportions, to improve the thermal stability of refractory materials, delaying the ring material erosion of refractories and destructive effect, slow ring phenomenon, obtains a good application effect.

      Masonry of refractory materials has also been a corresponding improvement. The composite precast slabs by anchor is welded and fixed on the kiln body, between two rows of brick layer with light castable and wear resistant pouring material filling, ensure the integrity, stability and thermal insulation refractory. In building process, in order to prevent the kiln rotary kiln in emphasis, built after four rows of prefabricated brick, turn to the top and then laying four lines. After the completion, in turn rotary masonry.

    Through the above method, to ease the interaction of refractory materials and materials, delaying ring phenomenon. And the use of masonry composite prefabricated brick and abrasion resistant castable refractory material to strengthen the strength, processing node ring for refractory material damage, repair cycle is short. Through the practice, refractory maintenance cycle from 2 to March was extended to 1 year, improve the rotary kiln operating rate, with significant economic benefits.

Refractory material storage requirements

Selection of refractory materials friends all know the requirement is quite strict, for refractory material in storage requirements you know how many? Below to introduce you to:

When the first use of refractory material is the site of the us to put it in the warehouse, do not put in open areas, this is easy to cause the refractory materials affected with damp, strength and other performance as before, not in use when the effect is very good. When placing the refractory material in the warehouse do not all piled up in a block, which is not conducive to use when we are looking for, so we piled according to categories labeled put good; refractory material not easily fixed damp most easily, so we should be placed in the moisture inside the warehouse, the refractory material which is easy to form a block as far as possible not to high stacking them, if the outer packaging Institute of refractories placement of damaged it to replace the outsourcing, to avoid leakage or moisture; in the outermost layer of refractory materials we try to put a time limit, the use of time to first select the use, avoid the expiration. So when we stacked refractory material must be careful.

The content of the refractory material stacking, for what is the requirement of knowledge you have a certain understanding of it, if you want to ask about refractories for more knowledge can consult us freely.

Matters needing attention during the construction of the castable refractory

Refractory castable is a widely used refractory products, it is there for many industries are very popular, because often used to this kind of refractory products, so today I will introduce the construction of refractory castable, should pay attention to the related matters.

The first step in the pre construction should be strictly examined, including: (1) to form a clear structure of castable refractory equipment is, and it will be clean. (2) to know have the process holes (3) construction require the use of the equipment must be in good condition, so we can ensure that the work can be carried out smoothly, (4) to know how is refractory castable packaging and delivery date, check whether the product failure. Using the second step is the construction of templates you can use steel or hard wood. But must ensure that the template has a very good rigidity, also is the strength to be good enough, so as to ensure not to use when running, will not shift, leakage. The use of wood template you must brush on a layer of waterproof paint, but steel template will be used in addition to mold agent, want to save template words, must be cleaned before use.

The final point to note is the lining refractory castable, stirring time, time can not be less than 5 minutes, can not use ordinary mixer, and to the use of forced mixer, must first dry mixed before mixing, then adding 80% solvent mixing, slowly stirring to obtain suitable work consistency. If there is something still unknown that you can contact us freely.

Anchor Brick for Heating Furnace,Refractory,Refractories,Refractory Material,Refractory Product.Yilong Refractory,Anchor Brick

Anchor Brick for Heating Furnace

The qualified of anchor brick is similar to the material of furnace lining castables and formed by preeing and being fired at high temperature. Characterized by good thermal shock resistance and high strength, it is used for several heating furnace and has good effect.
 

Monoblock Stopper,Refractory Material,Refractory Product,Yilong Refractory,Refractory,Refractories

Monoblock Stopper

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. 

Application of unshaped refractory materials

Unshaped refractory material is composed of reasonable distribution in the granular and powder and binder not forming and firing directly use of the refractories. Then what is the different unshaped refractory material application area, let us see it.

1. Iron making system.

Alumina silicon carbide carbon refractory castable for blast furnace trough.

As with hot-air burner refractory pouring castable lining.

Torpedo type iron waterwheel partial or full using refractory castable, can also use refractory coating to repair.

2. Rolling system.

All available unshaped refractory lining, steel forging heating furnace.

3. The steelmaking system.

Refractory coating repair of BOF and eaf.

Slag splashing.

Alumina magnesia castable making converter lining.

4. Other industrial system.

Petrochemical industry, ferrous metallurgy, fluidized bed boiler.

5. Building system.

The cement rotary kiln.

Glass tank furnace.

Ceramic kiln.

Above is the simple introduction application of unshaped refractory materials, thank you for reading, more detailed information can contact us, we will try our best to answer your questions.

Tundish Well Block,Tundish Refractory,Refractory Material,Refractory Products

Tundish Well Block

This product selects high-quality materials, pressing in molding machine, and low baking, It can be used with all kinds of tundish nozzles, and this product has advantages of high product strength, good thermal shock stability and erosion resistance.

 

Electric Furnace Gunning Mix ,Gunning Mix,Refractory Material,Refractory Product

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%. 

Carburant,Refractory Material.Refractory Product,China Refractory

Carburant

• Name: Carburant
• Products Id: a69
• Advantage: Less impurity content, recovery carbon stable with obvious effects, fixed C can be more than 93%
• Delivery Time: 30-60 Days
• Products Used: