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Refractory structure

More related products: Fused Cast AZS Block; Fused Cast Alumina Block; Fused Cast High Zirconia Block; Fused Cast Skid Rail Block

Acid refractory to silicon oxide as the main ingredient, commonly used silica brick and clay brick. Silica brick is a siliceous product containing more than 94% of silicon oxide. The raw materials used are silica and waste silica bricks. The anti-acid slag has strong erosion resistance, high load softening temperature, no shrinkage after volume calcination, and even slight expansion. However, it is susceptible to alkaline slag erosion, poor thermal shock resistance. Silicon brick is mainly used for coke oven, glass furnace, acid steelmaking furnace and other thermal equipment. Clay brick with refractory clay as the main raw material, containing 30% ~ 46% of alumina, is a weak acid refractory, thermal shock resistance

Refractories

Good, acidic slag resistance, widely used.

Neutral refractory material with alumina, chromium oxide or carbon as the main component. More than 95% alumina-containing corundum products is a wide range of high-quality refractory materials. Chromium oxide brick as the main component of the steel slag corrosion resistance, but poor thermal shock resistance, high temperature load deformation temperature is low. Carbonaceous refractory carbon brick, graphite products and silicon carbide products, its low thermal expansion coefficient, high thermal conductivity, good thermal shock resistance, high temperature strength, anti-acid and salt erosion, especially the weak acid-base with Better resistance, free from metal and slag wetting, light weight. Widely used as a high temperature lining material, but also for petroleum, chemical autoclave lining.

Alkaline refractory to magnesium oxide, calcium oxide as the main ingredient, commonly used is magnesia brick. Magnesia brick containing 80% -85% magnesia has good resistance to alkaline slag and iron slag, and has higher refractoriness than clay brick and silica brick. Mainly used in open hearth, oxygen blowing furnace, electric furnace, non-ferrous metal smelting equipment and some high-temperature equipment.

Refractory materials used on special occasions are high temperature oxide materials such as alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconium oxide and the like, refractory compound materials such as carbides, nitrides, borides, silicides and sulfides Etc .; high temperature composite materials, mainly cermets, high temperature inorganic coatings and fiber-reinforced ceramics.

Commonly used refractory materials are AZS bricks, corundum bricks, direct combination of magnesia-chrome brick, silicon carbide bricks, silicon nitride bonded silicon carbide bricks, nitrides, silicides, sulfides, borides, carbides and other non-oxide refractory ; Calcium oxide, chromium oxide, alumina, magnesium oxide, beryllium oxide and other refractory materials.

Often used in refractory materials are diatomite products, asbestos products, insulation panels.

Often used amorphous refractories, ramming material, castable, plastic, refractory mud, refractories refractories, refractory projectiles, refractory coatings, lightweight refractory castable, stemming and so on.

Bulk refractory material (amorphous refractory material): Unshaped refractory material is a kind of refractory material which is composed of granular and powder material and binder which are reasonable graded and are directly used without molding and firing. Usually, the granular materials that make up such a material are referred to as aggregates, which are referred to as admixtures for the powdered material and binders to the binder. This kind of material has no fixed shape and can be made into paste, paste and loose shape, which is also commonly known as bulk refractory. With this refractory material can constitute a seamless whole structure, it is also known as the overall refractory material.

The basic components of amorphous refractory materials are granular and powder refractory materials. According to their requirements, can be made of a variety of materials. In order to integrate these refractory materials into one, with a few exceptions, generally the appropriate variety and amount of binder are added. To improve their plasticity or reduce water use, a small amount of a suitable plasticizer may be added. To meet other special requirements, a small amount of other suitable additives may be added separately.

Generality

In general and special refractory materials, commonly used varieties are the following:

Acidic

The larger amount of silica brick and clay brick. Silica brick is a siliceous product containing more than 93% SiO2. The raw materials used are silica and waste silica bricks. Silica brick acid erosion resistance of slag strong, but vulnerable to the erosion of alkaline slag, its load softening temperature is high, close to its resistance to fire, the volume does not shrink after repeated calcination, or even a slight expansion, but the resistance

Refractory materials abrasive

Poor thermal shock. Silicon brick is mainly used for coke oven, glass furnace, acid steelmaking furnace and other thermal equipment. Clay bricks contain 30% ~ 46% of alumina, which is refractory clay as the main raw material, refractory 1580 ~ 1770 ℃, thermal shock resistance is good, is a weak acid refractory, acidic slag resistance, a wide range of uses, Is the largest production of a class of refractory materials.

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