Method for selecting high-grade rare-earth concentrates step by step
A rare earth concentrate and high-grade technology, applied in flotation, solid separation, etc., can solve the problems of difficult control of flotation conditions, low recovery rate, and increased dosage of flotation chemicals, so as to reduce the dosage of flotation equipment and chemicals , reduce smelting cost and improve the recovery rate
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[0021] The Baiyan Obo mixed rare earth concentrate with a rare earth grade of 10.86% and a particle size of -200 mesh accounting for more than 86% uses the technology of the present invention to formulate the first stage of roughing, one-time beneficiation and one-time sweeping. Rare earth medium ore is selected and 48% of the concentrated ore is swept through one sweep; the second stage is to formulate a plan for the 48% of the concentrated ore to be washed, deslimed and drug-free, followed by a roughing, a second beneficiation and a second sweeping Closed loop beneficiation process.
[0022] The amount of reagent added during flotation is calculated by weight ratio, and the specific flotation steps are:
[0023] 1) Priority flotation of some 65% rare earth concentrates
[0024] a. One-stage roughing: Raw material: low-grade mixed rare earth concentrate, put the low-grade mixed rare earth concentrate into the flotation tank, add water to mix the slurry and start stirring, so...
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