Refractory material production process

 

According to the degree of compactness and shape of the product, there are sintering method, casting method and melt injection method. Sintering method is part of the raw materials pre-burned clinker, broken and sieved, and then by a certain ratio and raw materials mixed, after molding, drying and firing. The purpose of raw materials is to burn the original water, organic impurities, sulfate decomposition of the gas burned to reduce the sintering of products to ensure the accuracy of the size of products. The raw materials need to be sieved after crushing and grinding, since the blanks are graded with powders of different sizes to ensure that the most compact deposits are obtained.

In order to homogenize the ingredients and particles of various raw materials and clinker, kneading is carried out while the binder is added to enhance the binder bonding strength. Such as aluminum silicate billet to join the combination of clay, magnesia billet into the sulfite pulp waste, silica billet to join the lime milk and so on. According to the amount of water content of the blank, you can use semi-dry molding (about 5% moisture), plastic molding (about 15% moisture) and grouting method (about 40% moisture). And then dried and fired. Casting method is the raw materials through the mixing and fine grinding process, in the high-temperature melting, direct casting, cooling crystallization, annealing products. Such as cast mullite tiles, corundum bricks and magnesia bricks. Their body is dense, high mechanical strength, high temperature structural strength, good slag resistance, the use of constantly expanding. The melt-blown method is a method in which a batch is melted and then blown into high-pressure air or superheated steam to disperse it into fibers or hollow spheres. Products are mainly used for light refractory, insulation materials. In addition, can also be made of powder or granular amorphous refractory, temporary use of tar, asphalt, cement, phosphate, sulfate or chloride and other bonding agent bonding, without molding and sintering and direct use.