A pretreatment method for volcanic rock type uranium ore with high acid consumption and difficult to leach

A technology for volcanic rock and uranium ore, which is applied in the field of pretreatment of volcanic rock type uranium ore, can solve the problems of large reagent consumption, large proportion of titanium-uranium ore, and low uranium leaching rate, so as to reduce reagent consumption, increase leaching rate, and reduce development costs. cost effect

Active Publication Date: 2022-05-03
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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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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  • A pretreatment method for volcanic rock type uranium ore with high acid consumption and difficult to leach
  • A pretreatment method for volcanic rock type uranium ore with high acid consumption and difficult to leach
  • A pretreatment method for volcanic rock type uranium ore with high acid consumption and difficult to leach

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A titanium-containing uranium ore is a volcanic rock-type uranium ore, and the ore is mainly composed of muscovite, quartz, calcite, epidote, rutile, fluorite, apatite, zircon, pitchblende, titanium uranite, pyrite, rutile , sphalerite, ilmenite, colloidal molybdenite, galena, magnetite, uranite, etc. Uranium mainly exists in the form of independent uranium minerals, including uranite, pitchblende, uranite, and a small amount of The isomorphic form exists in uranium thorium stone. The grade of uranium in the ore is 0.31%.

[0039] (1) Crush the ore particle 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 ores of each particle size of the group are re-selected with a shaking table respectively, and the gravity-selected concentrates of each particle size are combined to obtain a shaking table gravity-selected concentrate, most of the titanium-uranium ore ...

example 1

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

[0045] Table 1 Example 1 test results

[0046]

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

Embodiment 2

[0049] A titanium-containing uranium ore is a volcanic rock-type uranium ore, and the ore is mainly composed of muscovite, quartz, calcite, epidote, rutile, fluorite, apatite, zircon, pitchblende, titanium uranite, pyrite, Composed of rutile, sphalerite, ilmenite, colloidal molybdenite, galena, magnetite, uranite, etc. Uranium mainly exists in the form of independent uranium minerals, including uranite, pitchblende, uranite, and a small amount It exists in uranium thorium stone in the form of isomorphism. The grade of uranium in the ore is 0.31%.

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

[0051] (2) The ores of each particle size of the group are re-selected with a shaking table respectively, and the gravity-selected concentrates of each particle size are combined to obtain a shaking table gravity-selected conc...

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Abstract

The invention discloses a pretreatment method for volcanic rock type uranium ore which is difficult to leach with high acid consumption, and belongs to the technical field of mineral processing. In this method, the volcanic rock-type uranium ore is first re-selected to obtain uranium concentrate mainly composed of titanium uranium ore, and the gravity-selected tailings are passed through the foam flotation method to obtain uranium concentrate mainly composed of pitchblende ore. Based on the mineral composition and crystal phase characteristics of type uranium ore, the combination of gravity separation and flotation is used to separate and efficiently recover titanium uranium ore and pitchblende, and realize the separation of acid-consuming gangue minerals. The concentrate yield of titanium uranium ore is 13.98%, the uranium grade is 1.053%, the recovery rate is 48.22%, the distribution rate of titanium uranium ore is 87.57%, the flotation concentrate yield of pitchblende is 9.74%, the uranium grade is 1.375%, and the recovery rate is 43.87% %, different uranium ores are recovered separately, which is conducive to the subsequent recovery of uranium by different leaching methods. The difficult-to-leach niobium-titanium-uranium ore can be leached under pressure, and the pitchblende can be directly leached by conventional stirring. This pretreatment method can improve the leaching of uranium. At the same time, it can effectively reduce the production cost.

Description

technical field [0001] The invention relates to a pretreatment method for volcanic rock type uranium ore, in particular to a pretreatment method for volcanic rock type uranium ore by gravity separation combined with flotation to remove acid-consuming ore and realize the classification and enrichment of different uranium ores, belonging to the technical field of mineral processing . Background technique [0002] The titanium-containing uranium ore in Xiangshan belongs to volcanic rock type uranium ore, and the ore is mainly composed of quartz, feldspar, zircon, epidote, malachite, garnet, apatite, calcite, pyrite, colloidal molybdenum ore, sphalerite Zinc ore, chalcopyrite, galena, calcite, uranium ore, uranium ore, etc. The uranium in the ore mainly exists in the form of independent uranium minerals, including uranium ore, uranium ore, uranium ore, and a small amount of Isomorphism exists in uranium thorite, and these uranium minerals are closely related to pyrite, fluorite...

Claims

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Application Information

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Patent Type & Authority Patents(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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