Method for preparing cristobalite powder by using natural konilite

Abstract

A process for producing square quartz powder from natural quartz powder is carried out by washing natural quartz powder, filtering, dewatering for filtrate, drying, baking and dispersing into powder or dewatering and drying, adding into binder to make into block or honey-comb natural quartz, putting powdered, block or honey-comb natural quartz into high-temperature furnace of 1380-1600 deg. C, keeping temperature for 1-10 hrs, forge firing, cooling, dispersing, milling, magnetic separating, dry blowing and grading. It costs low and has more yield, better whiteness, and higher conversion and less iron and aluminum elements. It can be used as coating, filter acids of insulating material, ceramic and pesticide, filling additives of glass and plastic and sanding and polishing materials of precision casting and chip.

Description

technical field [0001] The invention relates to a process for preparing quartz powder, in particular to a process for preparing cristobalite powder. Background technique [0002] With the continuous development of science and technology, cristobalite powder processed by various processes has low density, high hardness, high whiteness, dispersibility, suspension, chemical stability, plasticity, light scattering and insulation. nice feature. Therefore, it has a wide range of industrial applications, and can be used as a filler for the manufacture of coatings, glass, paper, paint, plastics, rubber and adhesives, as well as materials for precision casting, electronic chip grinding and polishing. According to market research and analysis, the global annual demand for cristobalite powder used in the above industries is at least tens of billions of RMB. At present, the domestic and foreign methods of preparing cristobalite powder generally include synthetic chemical method and bl...

AI Technical Summary

Problems solved by technology

At present, the domestic and foreign methods of preparing cristobalite powder generally include synthetic chemical method and block quartz direct calcination method. Since the synthetic chemical method uses quartz sand for chemical treatment first, and then high-temperature calcination reduction to prepare cristobalite powder, It requires a huge chemical treatment device, so this preparation method has large investment, high production cost, and the synthetic quality of cristobalite powder is unstable; the direct calcination method of block quartz is to directly use block quartz to prepare cristobalite powder through high temperature calcination. , due to the shortage of bulk quartz raw material resources and the high cost of raw materials, the production cost of this preparation method is high

Therefore, the existing above-mentioned process for preparing cristobalite powder cannot meet the requirements of large cristobalite powder output and low production cost at the same time.