What is a chemically bonded refractory castable?

1.The use temperature of clay castable is 1300 1450, which is generally used as a rolling furnace, a variety of heat treatment furnaces, boilers, shaft kilns and rotary kilns pre-tropical lining 2The use temperature of high alumina castable is 1400 1550, which can be used as lining and burner of various heat treatment furnaces, electric furnace tapping trough, lime shaft kiln high temperature section, rotary kiln kiln head, power plant boiler and other lining 3

The use temperature of corundum castable is 1500 1650, which is mainly used as the lining of high-temperature components of various high-temperature furnaces, such as the impregnating pipe lining of molten steel vacuum degassing device, the lining of jet metallurgy and argon blowing integral spray gun, the lining of electric furnace top lining, LF furnace cover, and the high-temperature wear-resistant lining of catalytic cracking reactor in petrochemical industryLow-cement castables are mainly used as linings for thin linings and high-temperature refractory components with metal anchors, such as water from heating furnaces

Chemically bonded refractory castable is a castable made of phosphate, silicate and sulfate as binders, formulated in proportion with refractory aggregates, powders and admixtures, and cured or baked.

According to the different binders, the chemically bonded refractory castable can be divided into phosphoric acid refractory castable, aluminum phosphate refractory castable, polyphosphoric acid alkaline refractory castable, aluminum sulfate refractory castable, and sodium silicate refractory castable.

Refractory castable refers to a mixture composed of refractory aggregate, binder and admixture, which is mixed with water (or liquid binder) to form a mud that can be constructed by pouring method.

The difference with other amorphous refractories is that the refractory castable has a certain coagulation and hardening time after construction, so it needs to be cured for a certain period of time after pouring and molding before it can be demolded, and then it can be put into baking after natural curing for an appropriate time.

Castables classification.

There are many types and names of castables, which can be named according to aggregates, main components, use parts, chemical properties and characteristics, such as: according to refractory aggregates, clay aggregates (Al2O3 30% 45%), high alumina aggregates (Al2O3% 26GE; 45%), siliceous aggregate (SiO2% 26GE; 85%、al2o3%26lt;10%)。

Alkaline aggregates (magnesia, dolomite, etc.), special aggregates (carbon, carbide, spinel, zircon, nitride, etc.) and thermal insulation aggregates (perlite, vermiculite, ceramsite, drifting beads, light brick sand, porous clinker, alumina hollow balls, etc.). According to the binder, there are hydraulic bonding, chemical bonding, agglutination bonding refractory castable.

In addition to aggregates, product classification should also be classified according to porosity or specific gravity, for example: according to the porosity, there are two kinds of thermal insulation refractory castable and thermal insulation refractory castable with porosity of not less than 45%.

Refractory castables can be divided into the following categories 1, ironmaking system 2, steelmaking system 3, steel rolling system 4, building materials system 5, the application of refractory castable in the petrochemical industry is almost all over the kiln and thermal equipment and structures in various fields, in various industrial sectors, the metallurgical industry kiln is the most, the use conditions are harsh (it is recommended to use the oriental furnace lining castable), and the refractory castable consumed accounts for about 60% of its total output. Refractory castable is one of the most widely produced and used amorphous refractories. It is mainly used to construct various heating furnace linings and other integral structures.

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According to the teacher, refractory cement and castable are important materials used in the production of refractory materials. The following is a common refractory cement and castable formulation: Refractory cement formulation:

Portland cement: 70%- Portland powder: 30% castable formulation:

Refractory aggregate (such as high alumina aggregate): 60%- Refractory cement: 30%- Silicate powder:

10% specific formula can be adjusted according to actual needs to achieve the required fire resistance and working performance. In formulations, Portland cement and Portland powder can provide refractory properties, while refractory aggregates can provide structural strength and heat resistance. Depending on the specific use requirements, other additives can also be added to improve the properties of the material, such as increasing wear resistance, corrosion resistance, etc.

It should be noted that the proportion of materials in the formulation and the quality requirements have a great impact on the performance of the final product, so strict batching and quality control are required in actual production. In addition, in order to ensure safety and reliability, it is recommended to carry out the necessary tests and inspections before using refractories.

Refractory cement and castable formulations.

Dear We will be happy to answer your <>

According to the teacher's understanding, refractory cement and castable are important materials used for the production of refractory materials. The following is a common refractory cement and castable formulation: Refractory cement formulation:

Portland cement: 70%- Portland powder: 30% castable formulation:

Refractory aggregate (such as high alumina aggregate): 60%- Refractory cement: 30%- Silicate powder:

10% specific formula can be adjusted according to actual needs to achieve the required fire resistance and working performance. In formulations, Portland cement and Portland slow-acting powders can provide refractory properties, while refractory aggregates can provide structural strength and heat resistance. According to the specific use requirements, other additives can also be added to improve the performance of the material, such as increasing wear resistance, corrosion resistance, etc.

It should be noted that the proportion of materials in the formulation and the quality requirements have a great impact on the performance of the final product, so strict batching and quality control are required in actual production. In addition, in order to ensure safety and reliability, it is recommended to carry out the necessary tests and inspections before using refractories.

Portland powder on building cement?

No, construction cement is a powdered material made from calcining and grinding limestone and clay. Silicate powder is a kind of shengsheng powder containing silicate components, which can be used to make noisy refractory materials, ceramics, glass, etc. Although there is a certain amount of silicate content in construction cement, silicate powder and construction cement are different materials.

Silicate powder has not arrived** to buy?

Silicate powder can be purchased in the building materials market, chemical raw material market, online shopping platform and other places. You can find relevant suppliers in the local building materials market or chemical raw material market, or search and buy online.

Refractory castables.

A granular and powdery material made of refractory materials with a certain amount of binder. It has high fluidity and is suitable for amorphous refractories formed by pouring.

Compared with other amorphous refractories, the binder and moisture content are higher, so the fluidity is better. They have a wide range of applications and can be selected according to the conditions of use. It can be directly poured into a lining for use, and can be used to make prefabricated blocks by pouring or compaction methods.

Cement cement, powdered hydraulic inorganic cementitious material. After adding water and stirring into a slurry, it can be hardened in air or better hardened in water, and can firmly cement sand, stone and other materials together. Cement is an important building material, mortar or concrete made of cement, strong and durable, widely used in civil construction, water conservancy, national defense and other projects.

In the cement plant, the use of castable is very extensive, preheater, kiln tail, tertiary air duct, grate cooler, etc., all to use, according to different working conditions, the type of model used is also different, there are high alumina alkali resistance, anti-crusting, wear-resistant, and coal injection pipe special, many kinds.

The material is different, the castable is made of aggregate and cement or other curing agent linkers, while the mud is refractory mud, mainly refractory mud.

Before understanding the difference between castable and fire-resistant self-cocoa plastic, let's briefly talk about the difference between the composition of the two:

Refractory castables are mixtures composed of refractory aggregates, binders and admixtures.

The composition of refractory plastics is similar to that of refractory castables, which are composed of refractory aggregates and powders, binders and plasticizers, and special admixtures can be added according to different requirements, such as preservation agents, anti-shrinkage agents, antifreeze agents, etc.

The two are used in different ways:

Most of the refractory castables are mixed with water to form mud that can be constructed by pouring method, and can be demolded after a period of curing after pouring molding, and then can be put into baking after natural curing for an appropriate time.

Refractory plastics need to be combined with binders and constructed by tamping method. The commonly used binders are classified as clay bonded plastic, phosphoric acid bonded plastic, aluminum sulfate bonded plastic, etc.

In addition, the refractory plastic has good plasticity, good medium and high temperature bonding strength, wear resistance and thermal shock resistance. It is a recommended non-shaped refractory.