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Pretreatment method of volcanic rock type uranium ore with high acid consumption and difficult leaching

A technology for volcanic rock and uranium ore, applied in the field of volcanic rock type uranium ore pretreatment, can solve the problems of large consumption of reagents, large proportion of titanium-uranium ore, low leaching rate of uranium, etc., so as to reduce the consumption of reagents and improve the index of flotation concentrate , the effect of reducing production costs

Active Publication Date: 2021-01-01
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For volcanic rock-type uranium ores rich in acid-consuming minerals and refractory uranium minerals, the consumption of reagents is large during conventional agitation and leaching, the leaching rate of uranium is low, and the production cost of pressurized agitation and leaching is high. Composition characteristics and the occurrence state of uranium. Before the ore is leached, the ore is pretreated by beneficiation. According to the specificity of titanium-uranium ore and the characteristics of independent crystal form, most of the titanium-uranium ore is firstly separated by gravity separation. Enrichment in the gravity separation concentrate is conducive to the recovery of uranium in the gravity separation concentrate by means of pressure leaching. Gravity separation tailings use the method of flotation to enrich uranium minerals such as pitchblende and inhibit acid-consuming substances. The uranium in the flotation concentrate can be recovered by stirring and leaching, and the uranium ore can be divided into gravity concentration ore mainly containing titanium uranium ore and flotation concentrate mainly containing pitchblende uranium ore through ore dressing, and then respectively adopt The method of pressurized and stirring leaching recovers uranium, which can not only reduce the consumption of leaching reagents, but also increase the leaching rate of uranium

Method used

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  • Pretreatment method of volcanic rock type uranium ore with high acid consumption and difficult leaching
  • Pretreatment method of volcanic rock type uranium ore with high acid consumption and difficult leaching
  • Pretreatment method of volcanic rock type uranium ore with high acid consumption and difficult leaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]A titanium-bearing uranium ore is a volcanic uranium ore. The ore is mainly composed of muscovite, quartz, calcite, epidote, rutile, fluorite, apatite, zircon, bituminous uranium, ilmenite, pyrite, and rutile , Sphalerite, ilmenite, collothio-molybdenum, galena, magnetite, uranium, etc. Uranium mainly exists in the form of independent uranium minerals, including uranium ore, bituminous uranium, uranium, and a small amount of it The isomorphic form exists in uranium thorium. The uranium grade in the ore is 0.31%.

[0039](1) Crush the ore size to -8mm, grind the ore to a fineness of -0.6mm, and then divide it into -0.6mm~+0.3mm, -0.3mm~+0.15mm, -0.15mm~+0.074mm, -0.074mm four groups.

[0040](2) The ore of each size of the grouping is re-selected with a shaker, and the gravity concentrates of each size are combined to obtain a shaker gravity concentrate. Most of the titanium-uranium ore is enriched in the gravity concentrate. Part of the bituminous uranium also enters the gravity con...

example 1

[0044]The test results of Example 1 are shown in Table 1.

[0045]Table 1 Example 1 Test Results

[0046]

[0047]From the test results in Table 1, it can be seen that benzoic acid and oxidized paraffin soap have a certain ability to collect uranium minerals. However, when oxidized paraffin wax soap is used alone, the yield of roughing concentrate is high and the uranium grade is low; when benzhydroxamic acid is used alone, the selectivity to uranium minerals is better, and the grade of roughing concentrate is higher, but benzhydroxime The acid collection capacity is weak, and the recovery rate of uranium is low; when benzhydroxamic acid and oxidized paraffin soap are used in combination, the two agents can have a synergistic collection effect, and a high-grade and high-recovery crude concentrate can be obtained .

Embodiment 2

[0049]A titanium-bearing uranium ore is a volcanic uranium ore. The ore is mainly composed of muscovite, quartz, calcite, epidote, rutile, fluor + stone, apatite, zircon, bituminous uranium, ilmenite, pyrite, It is composed of rutile, sphalerite, ilmenite, collosulfide molybdenum, galena, magnetite, uranium, etc. Uranium mainly exists in the form of independent uranium minerals, including uranium uranium, bituminous uranium, uranium, and a small amount It exists in uranium thorium in the form of isomorphism. The uranium grade in the ore is 0.31%.

[0050](1) Crush the ore size to -5mm, grind the ore to a fineness of -0.3mm, and then divide the ore into three groups -0.3mm~+0.15mm, -0.15mm~+0.074mm, and -0.074mm according to the ore size.

[0051](2) The ore of each size of the grouping is re-selected with a shaker, and the gravity concentrates of each size are combined to obtain a shaker gravity concentrate. Most of the titanium-uranium ore is enriched in the gravity concentrate. Part of ...

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Abstract

The invention discloses a pretreatment method of volcanic rock type uranium ore with high acid consumption and difficult leaching, and belongs to the technical field of ore dressing. The method comprises the steps that the volcanic rock type uranium ore is subjected to gravity separation first, thus uranium concentrate with brannerite as the main component is obtained, gravity separation tailingsare subjected to a foam flotation method, and then uranium concentrate with uraninite as the main component is obtained. According to the mineral composition and crystal phase characteristics of the volcanic rock type uranium ore, the method combining gravity separation and flotation is adopted, the brannerite and uraninite are separately and efficiently recycled, and mineral separation of acid-consuming gangue is realized. The concentrate yield of the brannerite is 13.98%, the uranium grade is 1.053%, the recycling rate is 48.22%, the distribution rate of the brannerite is 87.57%, the flotation concentrate yield of the uraninite is 9.74%, the uranium grade is 1.375%, the recycling rate is 43.87%, different uranium ores are separately recycled, thus the method is beneficial to subsequent uranium recycling by adopting different leaching methods, the betafite which is difficult to leach can be subjected to pressure leaching, the uraninite can be directly leached by adopting conventionalagitation, and with the pretreatment method, the production cost can be effectively reduced while the leaching rate of uranium is improved.

Description

Technical field[0001]The invention relates to a volcanic rock-type uranium ore pretreatment method, in particular to a pretreatment method that combines volcanic rock-type uranium ore with gravity separation combined with flotation to remove acid-consuming ore and realize the classification and enrichment of different uranium ore, belonging to the technical field of beneficiation .Background technique[0002]Xiangshan titanium-bearing uranium ore belongs to volcanic rock type uranium ore. The ore is mainly composed of quartz, feldspar, zircon, epidote, malachite, garnet, apatite, calcite, pyrite, colloidal sulfide molybdenum Zinc ore, chalcopyrite, galena, calcite, ilmenite, bituminous uranium, etc. The uranium in the ore mainly exists in the form of independent uranium minerals, including bituminous uranium, ilmenite, uranium, and a small amount of it The isomorphism exists in uranium thorium, and these uranium minerals are closely related to pyrite, fluorite, rutile, apatite, muscov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00
CPCB03B7/00B03B1/00
Inventor 刘志超李春风李广马嘉吴永永强录德钟平汝唐宝彬
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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