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A mineral processing method, rare earth ore technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of high cost of mineral processing, complex process, poor stability, etc., to improve the economic benefits of enterprises, simple flotation process , cost reduction effect
Active Publication Date: 2017-06-06
江苏旌凯中科超导高技术有限公司
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[0012] The above-mentioned rare earth beneficiation process has the disadvantages of low recovery rate of rare earth concentrate, high beneficiation cost, complex process, large fluctuation of technical indicators, poor stability, etc.
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[0034] In order to enable those skilled in the art to better understand the solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.
[0035] The grade of rare earth in the ore treated in this embodiment is 4.85%.
[0036] The raw ore was subjected to multi-element analysis and content determination of main mineral components. The results are shown in Table 1 and Table 2, and the contents are in mass percentage.
[0037] Table 1 Chemical multi-element analysis results of raw ore
[0038] element REO Ba Sr SiO 2
F Fe TiO 2
content% 4.857 2.89 10.31 21.99 6.88 3.02 0.66 element CaO MgO Al 2 o 3
S K 2 o
Na 2 o
content% 14.98 4.62 5.17 0.082 4.64 1.87
[0039] Table 2 Determination results of main mineral composition
[0040]
[0041]
[0042] The analysis results show that the mineral composition in...
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Abstract
The invention discloses a beneficiation method of rare earth ore. The beneficiation method comprises the steps that crude ore is subjected to crushing and ore grinding till the crude ore with the fineness being -0.076 mm accounting for 50% or above, low intensity magnetic separation is carried out to remove strongly magnetic minerals, then superconducting magnetic separation rougher flotation is carried out to obtain rare earth rough concentrates, the rare earth rough concentrates are ground till the rare earth rough concentrates with the fineness being -0.076 mm accounting for 80% or above, conventional flotation work is carried out, and final rare earth ore concentrates are obtained; conventional flotation work includes the processes of one-section rougher flotation, two-section concentration and two-section scavenging; according to low intensity magnetic separation, the magnetic field intensity ranges from 0.1 T to 0.5 T, and the magnetic field force is (3-15)*10<5>kA<2>/m<2>; and according to superconducting magnetic separation, the magnetic field intensity is larger than 0.5 T, and the magnetic field force is larger than 3*10<7>kA<2>/m<2>. According to the method, the high-grade rare earth rough concentrates can be obtained through superconducting magnetic separation, a large quantity of tailings can be thrown out, the grading efficiency is high, the two-section ball grinding ore feeding quantity is greatly reduced, grinding and selecting energy consumption is reduced, the rare earth grade of the obtained rare earth ore concentrates is improved, and the recovery rate is high.
Description
technical field [0001] The invention relates to the technical field of rare earth ore beneficiation, in particular to a rare earth ore beneficiation method. Background technique [0002] The world reserves of rare earth resources are huge, about 57 million tons in terms of rare earth oxides, of which yttrium oxide is about 35,000 tons, accounting for 0.06% of the total reserves; in terms of mineral types, bastnaesite accounts for 50.6%, monazite and xenotime account for 46.4%, others accounted for 3.0%. There are about 150 kinds of rare earth minerals known in the world, and there are more than 250 kinds of minerals containing rare earth elements, but there are only more than 10 kinds of rare earth minerals that can be used by the metallurgical industry, such as bastnaesite, monazite, xenotime , fractalite, brown yttrium niobium ore, bastnasite, yttrium yttrium ore, allanite, yttrium fluorite, black rare gold ore, siliconite, etc., among which the main industrial minerals a...
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