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Coarse-grain tailings beneficiation method for low-grade uranium-containing rare earth polymetallic ore

A polymetallic ore and ore dressing method technology, applied in the field of uranium ore beneficiation, can solve the problems of difficult and useful minerals, comprehensive recovery, etc., and achieve the effect of low production cost, multiple types, and increased enrichment ratio

Active Publication Date: 2019-09-10
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to uranium, low-grade uranium-containing polymetallic ores are accompanied by various valuable metals such as niobium, rare earth, lead, and silver. It is difficult to comprehensively recover useful minerals through radioactive separation. Mineral dressing is a problem that needs to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a coarse-grain tailings beneficiation method for low-grade uranium-containing rare earth polymetallic ores, specifically:

[0027] In the uranium-bearing rare earth polymetallic deposits in a certain area in Northwest China, the ore-bearing vein rocks are mainly various vein rocks related to igneous carbonatite and mixed pegmatite veins formed by complex metasomatism. The uranium content in the ore body varies greatly, and The distribution is uneven, in the form of agglomerate aggregates and disseminated distributions, fine veins are formed in some places, and some useful minerals are closely symbiotic to form aggregates. The relationship between useful minerals and gangue minerals is simple. The following process is used for recovery: raw ore After being crushed by jaw crusher and cone crusher in turn, it enters the closed-circuit process of high-pressure roller mill + vibrating screen, and finally the under-screen product is -4mm qualified part...

Embodiment 2

[0029] This embodiment provides a coarse-grain tailings beneficiation method for low-grade uranium-containing rare earth polymetallic ores, specifically:

[0030]The polymetallic ore containing uranium, beryllium, niobium and rare earth in a certain area of ​​Inner Mongolia, the ore-bearing vein rocks are mainly granite veins, the uranium content in the ore body varies greatly, and the distribution is uneven, in a disseminated distribution, the particle size is very fine, most of them are useful Minerals are closely symbiotic and form aggregates. The relationship between useful minerals and gangue minerals is simple. The following process is used for recycling: After the raw ore is crushed by jaw crusher and cone crusher in turn, it enters the closed circuit of high-pressure roller mill + vibrating screen process, the final product under the sieve is a -3mm qualified particle size material, and the -0.074mm particle size content of the material is about 17%. After the under-sc...

Embodiment 3

[0032] This embodiment provides a coarse-grain tailings beneficiation method for low-grade uranium-containing rare earth polymetallic ores, specifically:

[0033] Polymetallic ores containing uranium, thorium, niobium, and rare earths in a certain area of ​​Inner Mongolia. The ore-bearing vein rocks are mainly alkali-feldspar granite veins. The uranium content in the ore body varies greatly, and the distribution is uneven. Minerals are concentrated in the +0.074mm particle size, uranium-containing minerals and niobium-containing minerals are closely related to each other, and most of them exist in the form of aggregates. The rare earth minerals are mainly monazite, and the intercalation relationship between useful minerals and gangue minerals is relatively simple. The following process is adopted Recycling: After the raw ore is crushed by jaw crusher and cone crusher in turn, it enters the closed-circuit process of high-pressure roller mill + vibrating screen, and finally the p...

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Abstract

The invention discloses a low grade uranium-bearing rare earth polymetallic ore separation method by discarding coarse tailings, and relates to the field of radioactive mineral beneficiation and metallurgy. The separation method comprises the following steps: performing crushing, high compression rolling and screening (prescreening and check screening) on the ore into crushed ore with the particle size of 4 mm or 3 mm; controlling the feeding size to enable the mass percentage of crushed ore of 0.074 mm particle-size grade to be smaller than or equal to 20%; adopting a coarse-particle spiral separator for whole grade gravity concentration, so as to obtain a part of coarse-particle concentrate reaching the economical beneficiation feed grade; merging middlings and tailings obtained by gravity concentration, and performing grading by adopting a high frequency vibrating screen and a hydrocyclone, wherein the screen size of the high frequency vibrating screen is controlled within 0.5-1.0 mm, the overflow particle size upper limit of the hydrocyclone is controlled within 0.074-0.10 mm, the sieve residue and hydrocyclone sands can serve as tailings to be discarded or serve as building sand, and the hydrocyclone overflows can serve as fine concentrate. According to the low grade uranium-bearing rare earth polymetallic ore separation method by discarding coarse tailings, the purpose of discarding a part of qualified waste rock at coarse particle size in advance is realized.

Description

technical field [0001] The invention relates to the field of uranium ore beneficiation, in particular to a method for beneficiation of low-grade uranium-containing rare earth polymetallic ore with coarse-grain tailings. Background technique [0002] There are four main types of uranium deposits in my country: granite-type, volcanic-type, sandstone-type, and carbon-silica-mudstone-type uranium deposits. There are more than 20 kinds of uranium-containing minerals with practical value, such as pitchblende, crystalline uranium ore, vanadium-uranium-potassium ore, and titanium-uranium ore. [0003] my country's uranium resources are not very rich, and the proven uranium reserves rank after the 10th in the world, which cannot meet the long-term needs of nuclear power development. The grade of uranium ore in my country is low, and phosphorus, sulfur, non-ferrous and rare metal minerals are usually symbiotic or associated with it. Although there is no shortage of uranium resources ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/00B03B7/00B03B1/00
Inventor 郑桂兵李松清崔强王建国崔栓芳胡进平王翾
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY