What are refractory bricks made of?

Although refractory bricks are widely used and have outstanding performance, many users do not understand their production materials, so they cannot correctly understand and use the bricks. In order to solve this problem, the raw materials for their production are introduced next, so that users can understand.

Refractory bricks are referred to as fire bricks. Refractory materials fired with refractory clay or other refractory raw materials. Light yellow or brownish. Mainly used in building and smelting furnaces, it can withstand high temperatures of 1,580 ° C to 1,770 ° C. Also called fire bricks. It is a refractory material with shape and size. According to the preparation process, it can be divided into fired bricks, unfired bricks, fused bricks (fused bricks), refractory and heat insulation bricks; according to the shape and size, it can be divided into standard bricks, ordinary bricks, special bricks, etc. It can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects at high temperatures. Such as refractory clay bricks, high alumina bricks, silica bricks, magnesia bricks, etc.

Refractories are generally divided into two types, namely unshaped refractories and shaped refractories. Unshaped refractories, also known as castables, are mixed powdery particles composed of various aggregates or aggregates and one or more bonding agents. When used, they must be mixed with one or more liquids and stirred evenly, which has strong fluidity. Shaped refractories generally refer to refractory bricks, which have standard rules in shape and can also be temporarily processed when building and cutting as needed.

Silica-aluminum refractory raw materials: silica, fused silica, semi-siliceous clay, wax stone, clay, clay, kaolinite, coke gemstone, bauxite, high bauxite, mullite, corundum, industrial alumina, spherical clay, bentonite.

Alkaline refractory raw materials: magnesite, magnesia, seawater magnesia, capacitive magnesia, dolomite, magnesia-dolomite, magnesia-calcium sand, magnesia-silica sand, magnesia-iron sand, magnesia-chromium sand, magnesia-aluminum spinel, magnesia-chromium spinel, magnesia-olivine, cordierite.

Other refractory materials: graphite, carbide, silicon carbide, nitride, boride, zirconia, zircon, ferrochrome sand.

Thermal insulation refractories: diatomaceous earth, vermiculite, perlite, drift beads, mineral wool.