Introduction of diatom brick

Diatom brick is a kind of heat insulation product made of porous diatomite. The main raw material is natural porous diatomffite, adding a small amount of bonded clay and combustible matter. The volume density of diatomite refractory brick for 0.7g/cm3 at room temperature, the compressive strength is 1 ~ 2MPa, The thermal conductivity is 0.13 ~ 0.20W/ (M. K) at 400 c, The coefficient of thermal expansion (1280 degrees) 0.9 * 10-6 -1 C. Diatom refractory bricks is mainly used in industrial kilns and other thermal equipment, heat pipe insulation materials, generally withstand the hot surface temperature is about 1000 degrees celsius.

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Introduction of diatom brick
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The properties and uses of refractory corundum castable

Corundum castable is a refractory product with Al2O3 content of more than 90% and corundum as its main crystal phase. It is compounded with proper dispersing agent, coagulant, stainless steel fiber and compounded by strict formula It has the characteristics of high temperature, good strength, wear resistance, erosion resistance, high thermal conductivity, thermal shock resistance, corrosion resistance, good sealing, quick setting, etc.
Refractory corundum castable are widely used in circulating fluidized bed boiler, metallurgy, petrochemical, thermal power and other industries. Adding a certain proportion of steel fiber and admixture to the castable can produce steel fiber castable with good thermal stability and strong wear resistance, Corundum refractory castable used for heating furnace hearth, spout and parts of cement rotary kiln kiln etc.

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The properties and uses of refractory corundum castable
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Classification and main performance of high aluminum refractory products

High Alumina Brick

(1) cement kiln with high alumina brick

Cement kiln combined with high alumina brick is a high bauxite clinker as aggregate and fine powder, phosphoric acid or aluminum phosphate as a binder, semi-dry press molding, in the 400 ℃ ~ 600 ℃ temperature heat treatment , Made of cement for the cement kiln with high alumina refractory products.
Products are divided into two varieties according to the binder. High-alumina brick (referred to as phosphate brick), the binder for the concentration of 42.5% to 50.0% of the phosphate solution, code-named P, lock brick code for the PC.
Phosphate directly combined with high alumina bricks, the high temperature of the higher strength, hanging kiln skin medium, high thermal conductivity, thermal shock stability is better. In the commissioning stage, open kiln and kiln kiln more times, showing a better performance.
(2) mullite and its products
Mullite is the only stable binary mineral phase in the Al2O3-SiO2 binary system. The chemical composition of 3 Al2O3 · 2 SiO2 (abbreviated as A3S2), the theoretical aluminum oxide and silicon oxide mass ratio of 71.88: 28.12. Mullite has a high melting point, high strength, small thermal expansion coefficient, and strong resistance to chemical corrosion. The use of pure mullite made of refractory bricks for the rotary kiln transition zone, showing a high load softening temperature, high high temperature strength, small expansion coefficient, thermal shock stability, good resistance to chemical corrosion Series of good use of performance. Due to its poor performance of hanging kiln skin, for the burning with the effect is not ideal. Industrial mullite are synthetic. According to the thermal processing method is divided into less combined into mullite and fused synthetic mullite.
(3) corundum refractory products
Corundum refers to the presence of Al2O3 crystals in the alpha crystal form. Theoretical composition of 100% pure Al2O3, crystal for the three crystal system. Corundum as the main raw material made of refractory suppliers products, the Al2O3 content of not less than 90%. Corundum refractories high refractoriness, high temperature strength, good wear resistance, strong resistance to chemical corrosion, but the thermal expansion rate is higher, thermal conductivity is also high. According to the impurity content is divided into white corundum (almost 100% Al2O3) and brown corundum. White corundum is almost rarely used.
(4) anti-peeling high alumina brick
Is a special high bauxite clinker and zirconia synthesis of raw materials as raw materials, according to a certain ratio of high-pressure molding through the firing products. Products with high temperature impact resistance, high thermal strength, anti-peeling ability, alkali and sulfur, chlorine erosion and other characteristics, a large number of large-scale dry cement kiln for the transition zone and decomposition zone.

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