Method for preparing high-cerium nano-stage rare earth polishing powder from rare earth ore concentrate
A technology for rare earth polishing powder and rare earth concentrate, which is applied to polishing compositions containing abrasives, etc., can solve the problems of long production time, high cost, low yield of finished powder, etc., and achieves short production process cycle and reduced production. Cost, the effect of fast decomposition
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Embodiment 1
[0021] Rare earth concentrate powder and ammonium bicarbonate, then add molten concentrated sulfuric acid, burn at 650°C, the amount of concentrated sulfuric acid added is 30% of the weight of rare earth concentrate powder, and keep stirring to make it fully react. Prepare mixed rare earth carbonate directly; mix rare earth carbonate with 1 part of alkali, heat to 800°C, melt the mixture, keep it in the molten state for 3 hours, cool, crush, and then add 45% industrial hydrofluoric acid, the amount of It is 20% of the weight of rare earth concentrate powder to obtain fluoride oxidized rare earth enrichment, fluoride oxidization rare earth enrichment, pulverize, wash with water, filter water, mix evenly in a mixer, and then put it into a high-energy ball mill with a sieve, and fill it with 1MPa Nitrogen for wet powder high-energy ball milling; there is a high-pressure airflow rotating channel under the rear sieve of the high-energy ball milling chamber, and the powder under the ...
Embodiment 2
[0023] Rare earth concentrate powder and ammonium bicarbonate, then add molten concentrated sulfuric acid, burn at a temperature of 800 ° C, the amount of concentrated sulfuric acid added is 20% of the weight of rare earth concentrate powder, and keep stirring to make it fully react. Prepare mixed rare earth carbonate directly; mix rare earth carbonate with 2 parts of alkali, heat to 700°C, melt the mixture, keep it in the molten state for 2 hours, cool, crush, and then add 45% industrial hydrofluoric acid, the amount It is 15% of the weight of rare earth concentrate powder to obtain fluoride oxidized rare earth concentrate, fluoride oxide dilute concentrate, pulverized, washed with water, filtered, mixed evenly in a mixer, and then loaded into a high-energy ball mill with a sieve, filled with 1.5 MPa nitrogen for wet powder high-energy ball milling; there is a high-pressure airflow rotating channel under the rear sieve of the high-energy ball milling chamber, and the powder un...
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