According to the compactness and shape of the products, there are sintering method, melting casting method and melting injection method. Sintering method is to pre-burn some raw materials into clinker, crushing and screening, and then according to a certain ratio with raw materials mixed, after molding, drying and firing. The purpose of pre-firing of raw materials is to remove the moisture, organic impurities and dissolved gases of sulfate, so as to reduce the shrinkage of the products and ensure the accuracy of the products’shape and size. The material must be sieved after crushing and grinding, because the billet is graded by powder of different particle size, which can ensure compact packing and obtain compact billet. In order to homogenize the composition and particles of raw materials and clinker, the mixture should be mixed and the binder should be added to enhance the binding strength of the billet. For example, aluminum silicate billets are added with bonded clay, magnesium billets are added with sulfite paper pulp waste liquid, silica billets are added with lime milk, etc. . Depending on the moisture content of the billet, semi-dry molding (about 5% moisture) , plastic molding (about 15% moisture) and grouting molding (about 40% moisture) can be used. And then they dry and burn it. The melting casting method is to melt the raw materials at high temperature through blending and fine grinding, then cast them directly, and then crystallize and anneal them into products. Such as melting casting mullite brick, corundum brick and Magnesia brick and so on. Their Compact Green Body, high mechanical strength, high-temperature structural strength, good slag resistance, the use of the scope is constantly expanding. The melt injection method is to melt the ingredients, to high-pressure air or superheated steam injection, so that it is dispersed into fiber or hollow ball method. Products are mainly used as lightweight refractory, heat insulation materials. In addition, it can be made into powder or granular Refractory which can be bonded with binder such as tar, asphalt, cement, phosphate, sulfate or chloride when used.According to the compactness and shape of the products, there are sintering method, melting casting method and melting injection method. Sintering method is to pre-burn some raw materials into clinker, crushing and screening, and then according to a certain ratio with raw materials mixed, after molding, drying and firing. The purpose of pre-firing of raw materials is to remove the moisture, organic impurities and dissolved gases of sulfate, so as to reduce the shrinkage of the products and ensure the accuracy of the products’shape and size. The material must be sieved after crushing and grinding, because the billet is graded by powder of different particle size, which can ensure compact packing and obtain compact billet. In order to homogenize the composition and particles of raw materials and clinker, the mixture should be mixed and the binder should be added to enhance the binding strength of the billet. For example, aluminum silicate billets are added with bonded clay, magnesium billets are added with sulfite paper pulp waste liquid, silica billets are added with lime milk, etc. . Depending on the moisture content of the billet, semi-dry molding (about 5% moisture) , plastic molding (about 15% moisture) and grouting molding (about 40% moisture) can be used. And then they dry and burn it. The melting casting method is to melt the raw materials at high temperature through blending and fine grinding, then cast them directly, and then crystallize and anneal them into products. Such as melting casting mullite brick, corundum brick and Magnesia brick and so on. Their Compact Green Body, high mechanical strength, high-temperature structural strength, good slag resistance, the use of the scope is constantly expanding. The melt injection method is to melt the ingredients, to high-pressure air or superheated steam injection, so that it is dispersed into fiber or hollow ball method. Products are mainly used as lightweight refractory, heat insulation materials. In addition, it can be made into powder or granular Refractory which can be bonded with binder such as tar, asphalt, cement, phosphate, sulfate or chloride when used.