A kind of beneficiation method of purifying bastnaesite concentrate

A beneficiation method, bastnaesite technology, applied in flotation, solid separation, etc., can solve the problems of three wastes pollution, failure to achieve high recovery rate, poor separation effect, etc., achieve high recovery rate and low production cost Effect

Inactive Publication Date: 2011-12-14
INNER MONGOLIA UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The smelting of mixed rare earth concentrate can only use concentrated sulfuric acid roasting process. The disadvantage of this process is the serious pollution of three wastes. For many years, mineral processing experts have been trying to produce pure bastnaesite concentrate instead of mixed rare earth concentrate, so as to fundamentally solve the three waste pollution of rare earth enterprises. question
The result of this is mainly that in this process, the first concentrate ore and the second concentrate ore are combined and returned to roughing, and the separation effect is not good. In addition, there are only two stages of concentration, and it is impossible to obtain high-purity concentrates, and it is impossible to achieve to high recovery, in the absence of middlings, the purity and recovery of the two products are complementary

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  • A kind of beneficiation method of purifying bastnaesite concentrate
  • A kind of beneficiation method of purifying bastnaesite concentrate

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Experimental program
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Effect test

Embodiment 1

[0029] Bastnaesite concentrate is separated from a mixed rare earth concentrate by flotation. The REO content in the mixed rare earth concentrate is 50.5%, the bastnaesite REO is 30.7%, and the bastnaesite purity is 60.8%. Bastnaesite concentrate is separated and prepared from this mixed mineral by using a closed-circuit cycle mineral processing process of beneficiation, four times of beneficiation, and two times of sweeping. Specific steps are as follows:

[0030] (1) Rough separation: put bastnaesite-based mixed rare earth concentrate into the flotation tank, add water to mix and adjust the slurry, the mass concentration of the slurry is 30%, stir, and add 3.5kg of alum in turn by weight / t, phthalic acid 3.5kg / t, No. 2 oil 0.015kg / t, pulp temperature 18°C, pulp pH 4.0, rough separation to obtain rough separation bastnaesite concentrate and rough separation tailings;

[0031](2) Concentration: Add the coarsely selected bastnaesite concentrate to the flotation tank, add wate...

Embodiment 2

[0035] Bastnaesite concentrate is separated from a mixed rare earth concentrate by flotation. The REO content in the mixed rare earth concentrate is 41.5%, the bastnaesite REO is 33.4%, and the bastnaesite purity is 84.9%. Bastnaesite concentrate is separated and prepared from this mixed mineral by using a closed-circuit cycle mineral processing process of beneficiation, four times of beneficiation, and two times of sweeping. The reagent system during flotation is: rough selection: alum 2.7kg / t, phthalic acid 2.5kg / t, No. 2 oil 0.015kg / t; 2.0kg / t, No. 2 oil 0.010kg / t; Second essence: alum 1.5kg / t, phthalic acid 2.0kg / t, No. 2 oil 0.010kg / t; Three essence: alum 1.2kg / t, phthalate Diformic acid 1.5kg / t, No. 2 oil 0.005kg / t; Four essences: alum 1.0kg / t, phthalic acid 1.5kg / t, No. 2 oil 0.010kg / t; sweep: alum 1.5kg / t , phthalic acid: 2.0kg / t, No. 2 oil 0.015kg / t; second cleaning: alum 1.3kg / t, phthalic acid: 1.8kg / t, No. 2 oil 0kg / t; mass concentration of roughing pulp Control a...

Embodiment 3

[0038] Flotation separation of bastnaesite concentrate from a mixed rare earth concentrate, the content of REO in the mixed rare earth concentrate is 55.2%, the REO of bastnaesite is 41.9%, and the purity of bastnaesite is 75.9%. Bastnaesite concentrate is separated and prepared from this mixed mineral by using a closed-circuit cycle mineral processing process of beneficiation, four times of beneficiation, and two times of sweeping. The reagent system during flotation is: rough selection: alum 5.5kg / t, phthalic acid 4.5kg / t, No. 2 oil 0.020kg / t; t, No. 2 oil 0.010kg / t; Second essence: alum 2.5kg / t, phthalic acid 3.0kg / t, No. 2 oil 0.010kg / t; Three essence: alum 1.5kg / t, phthalic acid 2.0 kg / t, No. 2 oil 0.010kg / t; four essences: alum 1.0kg / t, phthalic acid 1.5kg / t, No. 2 oil 0.010kg / t; sweep: alum 1.5kg / t, phthalate Formic acid 1.5kg / t, No. 2 oil 0.015kg / t; Second cleaning: alum 1.5kg / t, phthalic acid 2.0kg / t, No. 2 oil 0.015kg / t; the mass concentration of roughing pulp is co...

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Abstract

The invention relates to a beneficiation method for purifying bastnaesite concentrate, which belongs to the technical field of rare earth beneficiation. The present invention is a new mineral processing process for purifying bastnaesite concentrate from mixed rare earth concentrate mainly composed of bastnaesite in Baotou Baiyun Obo. Phthalic acid is used as a collector, alum is used as a regulator, and No. 2 oil is used as a foaming agent. After a flotation process of primary roughing, fourth stage selection, and secondary sweeping, the purity of the bastnaesite concentrate obtained is ≥98%, bastnaesite recovery rate ≥95%, thus providing high-quality raw materials for the reform of the mixed rare earth concentrate smelting process.

Description

technical field [0001] The invention relates to a beneficiation method for purifying bastnaesite concentrate, which belongs to the technical field of rare earth beneficiation. Background technique [0002] Baotou Baiyun Obo Mine is the largest rare earth mine in the world, but there are more than a dozen kinds of rare earth minerals, the main ones are bastnaesite and monazite, and there are also a small amount of other minerals, such as Huanghe ore, calcite, and stylosite , Peracite, etc. Among them, bastnaesite has the highest content, accounting for 60-80% of the total rare earth minerals. So far, there is no pure bastnaesite concentrate product in Baotou rare earth industry, all are mixed rare earth concentrate products. The smelting of mixed rare earth concentrate can only use concentrated sulfuric acid roasting process. The disadvantage of this process is the serious pollution of three wastes. For many years, mineral processing experts have been trying to produce pure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/004B03D101/02B03D101/04
Inventor 李梅柳召刚王觅堂胡艳宏高凯张栋梁张晓伟
Owner INNER MONGOLIA UNIV OF SCI & TECH
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