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Production technology of huixinlong refractory
Zhengzhou huixinlong refractory
According to the density and shape of the products, there are sintering method, melting casting method and melt blowing method. The sintering method is to pre burn the mature raw materials, crush and screen them, then mix them with the raw materials according to a certain proportion, and then form, dry and burn them. The purpose of raw material pre burning is to burn off the water, organic impurities and sulfate decomposed gases, so as to reduce the burning shrinkage of products and ensure the correctness of the shape and size of products. After crushing and grinding, the raw materials also need to be screened. Because the billets are graded by different sizes of powder, the compact billets can be obtained by tight accumulation.
In order to make the components and particles of various raw materials and clinker average, it is necessary to mix them and add binder at the same time to enhance the binding strength of the billets. For example, aluminum silicate billets are added with binding clay, magnesium billets are added with sulfite pulp waste liquid, silicon billets are added with lime milk, etc. According to the moisture content of the blank, it can be formed by semi dry method (about 5% moisture content), plastic method (about 15% moisture content) and grouting method (about 40% moisture content). Then dry and burn. The melting casting method is to melt the raw materials at high temperature, directly cast them, cool and crystallize them, and then anneal them into products. Such as mullite brick, corundum brick and magnesia brick. They have compact body, high mechanical strength, high temperature structural strength, good slag resistance and expanding application range. The melt blowing method is to melt the ingredients and spray them with high pressure air or superheated steam to disperse them into fibers or hollow spheres. The products are mainly used as light refractory and heat insulation materials. In addition, it can also be made into powder or granular amorphous refractories, which are cemented with such binders as tar, asphalt, cement, phosphate, sulfate or chloride when in use, and directly used without molding and sintering.