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Cerium oxide polishing powders main components

The main components of cerium oxide polishing powders are cerium oxide (CeO2), followed by lanthanum oxide (La2O3), praseodymium oxide (Pr2O3), lanthanum oxyfluoride (LaOF), in addition to trace silica, alumina and calcium oxide The

Cerium oxide polishing powders production process:

☆ production of high cerium rare earth polishing powders

The rare earth mixture after separation of cerium oxide as raw material, the physical and chemical processing into a large hardness, uniform size, small, was face-centered cubic crystal powder products.

The main process is: raw materials → high temperature → calcination → water quenching → hydraulic classification → filtration → drying → high cerium rare earth polishing powders products. The main equipment are: calciner, water quenching tank, classifier, filter, drying box. The main indicators: product w (REO) = 99%, w (CeO2) = 99%; rare earth recovery rate of about 95%. The product is suitable for high-speed polishing. This high cerium polishing powders is the first to replace the classical polished iron oxide powder (red powder).

Preparation of Cerium - based Rare Earth Polishing Powders

(Rare earth hydroxide) (w (REO) = 65%, w (CeO2) ≥48%) as raw material, pretreated with rare earth salt solution by chemical method, adding intermediate (precipitant) into w (CeO2) = 80% ~ 85% of the intermediate cerium rare earth polishing powders products. The main process is:

Raw materials → oxidation → excellent solution → filtration → acid solution → precipitation → washing filter → high temperature calcination → fine grinding sieve → intermediate cerium rare earth polishing powders products.

The main equipment are: oxidation tank, excellent tank, acid tank, sedimentation tank, filter, calciner, fine grinding sieve and packaging machine.

The main indicators: product w (REO) = 90%, w (CeO2) = 80% ~ 85%; rare earth catalytic material recovery rate of about 95%; average particle size of 0.4 microns to 1.3 microns. The product is suitable for high-speed polishing, than the high-grade cerium rare earth polishing powders for high-speed polishing performance is more excellent.

☆ Preparation of low cerium rare earth polishing powders

(W (REO) ≥45%, w (CeO2) ≥48%) as the raw material, the synthesis of intermediates (precipitants) for double salt precipitation treatment can be prepared low-grade cerium rare earth polishing powders products The

The main process is: raw materials → → → → → → → → → → → → → → → → → →

The main equipment are: dissolved tank, sedimentation tank, filter, calciner, grinder, fine grinding sieve.

The main indicators: product w (REO) = 85% ~ 90%, w (CeO2) = 48% ~ 50%; rare earth recovery rate of about 95%; average particle size 0.5 microns to 1.5 microns.

At present, the domestic production of low-grade cerium rare earth polishing powders the most, accounting for more than 90% of total output.


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