A producing process for preparing cerium oxide polishing powder

Abstract

The invention relates to the technical field of chemical production and particularly relates to a producing process for preparing cerium oxide polishing powder. Producing processes at present for cerium oxide polishing powder have disadvantages that: the environment is polluted; energy resources are wasted; and the polishing efficiency namely the cutting rate, polishing quality and service lifetime of the obtained cerium oxide polishing powder by the processes at present fail to meet requirements. The producing process adopts high-purity cerium oxide or cerous carbonate or cerous oxalate as a raw material, and by steps of heating, maintaining the temperature, performing secondary heating, performing secondary temperature maintaining, quenching, calcinating, removing water, drying, smashing and grading to obtain the polishing powder. A product of the producing process has advantages of high polishing speed, long service lifetime, good polishing quality, simple process, low raw material cost, energy conservation and environment protection.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a production process for preparing cerium oxide polishing powder. Background technique [0002] The application fields of rare earth polishing materials are constantly changing, from traditional TV picture tube glass bulb polishing, rhinestone polishing, etc. to high-performance polishing fields such as liquid crystal display more precise optical instruments and devices. From the perspective of development trend, the field of liquid crystal display and high-grade optical glass processing is the development direction of the application of rare earth polishing materials. High-grade polishing powder has high added value and high profit, and is closely related to the high-tech field with rapid development, so it has broad application prospects. At present, the development and production of high-performance rare earth polishing materials are mainly concentrated in Japan,...

AI Technical Summary

Problems solved by technology

However, China's high-performance polishing powder mainly relies on imports, and the production process of polishing powder is relatively backward. , in which the calcination process is through heating, 1000°C-1080°C calcination heat preservation, cooling, crushing and grading, adding additives, and obtaining finished products; the disadvantage is: the cost of raw materials is high, and more precious and scarce praseodymium is required in addition to the rare earth element lanthanum cerium Neodymium element; polluting the environment, fluorine and other environmentally unfavorable elements are discharged during production and use; waste of energy resources, such as wasting a lot of water resources in the fluorination process, especially in the calcination process, the calcination temperature is high and the process is long , heating, heat preservation, and cooling all require a lot of energy; the polishing powder produced by the existing technology cannot polish hard glass, and it cannot be polished; the service life is not long; at the same time, the polishing efficiency, both the cutting rate and the polishing quality, cannot meet the current domestic demand.

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