Several main USES of fire clay

Several main USES of industrial refractory clay are refractory clay with a refractoriness greater than 1580℃, which can be used as refractory material, and bauxite which can be used as refractory material.In addition to high fire resistance, they can maintain volume stability at high temperature, and have slag resistance, resistance to quench and heat, as well as certain mechanical strength, so they are extremely firm after calcining.

Fireclay can be classified into soft clay, semi-soft clay, hard clay and high-alumina clay according to plasticity, ore characteristics and industrial use.Soft clay is generally in the form of soil, which is easy to disperse in water and can form plastic clay mass after mixing with liquid.The dispersibility of semi-soft clay is poor and its dispersive part can form plastic clay mass after mixing with liquid.These two clays are often used as binders in refractory products.Hard clay is often block or sheet, generally in the water without dispersion, high refractoriness, for the main raw materials of refractory products.High alumina clay Al2O3 has high content, hardness and specific gravity, and high fire resistance.

Refractory clay is mainly used in metallurgical industry, as the raw material for the production of shaped refractories (bricks of various specifications) and unshaped refractories, the amount of which accounts for about 70% of all refractories.The hard clay in refractory clay is used for making refractory material of blast furnace, ironmaking furnace, hot air furnace, lining brick and plug head brick of shengsteel drum.High alumina clay is used to make alumina brick, high alumina lining brick and high alumina refractory clay for electric furnace and blast furnace.Hard clay brick and high alumina clay are often used as mature materials calcined at high temperature (1400 ~ 1800℃).

Refractory clay is used in the building materials industry to make high alumina bricks, phosphate high alumina refractory bricks and high alumina fused cast bricks used in cement kilns and glass melting kilns.High-alumina clay is calcined and then mixed with limestone to make aluminum-containing cement, which has the characteristics of quick setting, corrosion resistance and heat resistance.

Refractory clay also has important applications in grinding industry, chemical industry and ceramic industry.High alumina clay is melted in an electric arc furnace to produce abrasive materials, among which fused corundum abrasive is the most widely used abrasive at present, accounting for 2/3 of all abrasive products.High alumina clay can be used to produce various aluminum compounds, such as aluminum sulfate, aluminum hydroxide, aluminum chloride, potassium sulfate, aluminum and other chemical products.In the ceramic industry, hard clay and semi-hard clay can be used as raw materials for daily ceramics, building porcelain and industrial porcelain.

In addition, high-alumina clay is used in oil Wells as proppant for oil purification, in agriculture as fertilizer enhancer, and as skid and abrasion resistant paving material, among other things.Hard clay is also used to make new refractory insulation material —& ndash;Refractory fiber, it has high temperature resistance, small thermal conductivity, acid and alkali resistance, sound absorption and light quality and other advantages, widely used in metallurgy, machinery, electronics, glass, ceramics and other industries.