Refractory bricks are referred to as fire bricks, refractory materials fired from refractory clay or other refractory materials. Light yellow or brownish, mainly used in smelting furnaces, capable of withstanding high temperatures of 1,580 ° C - 1,770 ° C. Refractory bricks are generally divided into two types, namely, amorphous refractories and shaped refractories. Unshaped refractory: also known as castable, is a mixed powdery granule composed of a variety of aggregates or aggregates and one or more binders. It must be mixed with one or more liquids evenly when used. Has a strong liquidity. Shaped refractory: General refractory bricks, which have standard rules in shape, and can be temporarily processed as needed.