2015年4月29日星期三

The production process of refractory materials

According to the product and density of the different shape, sintering method, casting and meltrefractory brickblowing process. The sintering process is part of the raw material will burn in mature, crushing and screening, and then according to a certain ratio and raw material mixing, molding, drying and firing after. Raw materials burn to the gas in water, organic impurities, sulfate decomposition and burning, to reduce product firing shrinkage, ensure the accuracy of refractories size. Raw materials need to be screened in crushing and grinding is, because the billet is graded by the powder of different particle size, can guarantee the most compact and dense body.
In order to make all kinds of raw material and clinker composition and particle uniformity, for mixing, adding binder, in order to enhance the bonding strength of the blank. Such as aluminum silicate material is mixed with clay, magnesium billets into sulfite pulp waste liquid,Ceramic Fiber Blanketsilicon material with lime milk. According to the material moisture, can adopt semi dry method (containing about 5% of water), plastic molding (containing about 15% moisture) and grouting molding (containing about 40% of water). And then drying and firing. Casting is the raw material through blending blending and grinding processes, directly in high temperature melting, casting, the cooling crystallization, annealing become products. As cast mullite brick, corundum brick and magnesia brick etc… Their body is compact, high mechanical strength, high temperature strength, good slag resistance, use range expanding. Melt blowing method is to put the ingredients melting, with high pressure air or steam injection, dispersing method of fiber and hollow spheres. Products are mainly used as lightweight refractory, insulation material. In addition, also can be made into powdered or granular unshaped refractory materials, the tar, asphalt, used in cement, phosphate, sulfate and chloride salt bond cementation, not forming and sintering and direct use.

没有评论:

发表评论