Flotation method of crystalline uranium ore

A uranium ore and crystalline technology, which is applied in the flotation field of crystalline uranium ore, can solve the problems of low uranium grade and recovery rate, and achieve the effects of reducing production cost, reducing processing capacity and reagent consumption, and high uranium recovery rate

Active Publication Date: 2020-08-14
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of low grade and recovery rate of uranium in the flotation concentrate when flotation crystalline uranium ore, the present invention invents a high-efficiency flotation method for crystalline uranium ore. ore, and...

Method used

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  • Flotation method of crystalline uranium ore
  • Flotation method of crystalline uranium ore
  • Flotation method of crystalline uranium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The main gangue minerals of a pegmatite granite-type uranium ore are microplagioclase, plagioclase, and quartz, with basically equal contents. The content of biotite varies from 5 to 20%, and a small amount of muscovite is occasionally seen. Uranium mainly exists in the form of crystalline uranium ore, which accounts for more than 90% of all uranium-containing minerals, with a uranium grade of 0.087%.

[0040] (1) After crushing the ore to -3mm, grind the ore to a fineness of -200 mesh accounting for 65%, adjust the slurry concentration to 25% of the ore mass fraction, adjust the temperature to 30 °C, and transfer it to the flotation cell.

[0041] (2) Sulfuric acid was added to the pulp, and the pH value of the pulp was adjusted to 5.5.

[0042] (3) Add 600g / t of gangue mineral inhibitor water glass to the slurry, and stir for 15min under the condition of stirring speed of 1900r / min.

[0043] (4) Add crystalline uranium ore activator, ferric chloride 800g / t, copper s...

Embodiment 2

[0049] The main gangue minerals of a pegmatite granite-type uranium ore are microplagioclase, plagioclase, and quartz, with basically equal contents. The content of biotite varies from 5 to 20%, and a small amount of muscovite is occasionally seen. Uranium mainly exists in the form of crystalline uranium ore, which accounts for more than 90% of all uranium-containing minerals, with a uranium grade of 0.087%.

[0050] (1) After crushing the ore to -2mm, grind the ore to a fineness of -200 mesh accounting for 70%, adjust the slurry concentration to 25% ore mass fraction, adjust the temperature to 35°C, and transfer it to the flotation cell.

[0051] (2) Add sulfuric acid to the pulp, and adjust the pH value of the pulp to 6.5.

[0052] (3) Add 800g / t of gangue mineral inhibitor water glass to the slurry, and stir for 5min under the condition of stirring speed of 2000r / min.

[0053] (4) Add 1000g / t of crystalline uranium ore activator ferric chloride and 500g / t of copper sulfate ...

Embodiment 3

[0060] The main gangue minerals of a pegmatite granite-type uranium ore are microplagioclase, plagioclase, and quartz, with basically equal contents. The content of biotite varies from 5 to 20%, and a small amount of muscovite is occasionally seen. Uranium mainly exists in the form of crystalline uranium ore, which accounts for more than 90% of all uranium-containing minerals, with a uranium grade of 0.087%.

[0061] (1) After crushing the ore to -2.5mm, grind the ore to a fineness of -200 mesh accounting for 75%, adjust the slurry concentration to 30% ore mass fraction, adjust the temperature to 35 °C, and transfer it to the flotation cell.

[0062] (2) Sulfuric acid was added to the pulp, and the pH value of the pulp was adjusted to 6.0.

[0063] (3) Add 900 g / t of gangue mineral inhibitor water glass to the slurry, and stir for 5 minutes under the condition of a stirring speed of 2000 r / min.

[0064] (4) Add crystalline uranium ore activator ferric chloride 1200g / t and co...

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Abstract

The invention belongs to the technical field of beneficiation, and particularly relates to a flotation method for crystalline uranium ore. The method comprises: crushing and grinding ore, adjusting the concentration of ore pulp until the mass fraction of the ore accounts for 10%-40%, transferring the ore pulp into a flotation tank, adjusting the pH value of the ore pulp to 4-6.5 by using sulfuricacid, adding water glass into the ore pulp, stirring, adding ferric chloride and copper sulfate into the ore pulp, stirring so that the crystalline uranium ore is in full contact and combination withFe<3+> and Cu<2+>, adding benzohydroxamic acid and sodium oleate into the ore pulp, stirring, adding No.2 oil, stirring, performing air flotation on the niobium-titanium-uranium ore to obtain roughingconcentrate and roughing tailings, adding ferric chloride and copper sulfate into the obtained roughing tailings, stirring, adding benzohydroxamic acid and sodium oleate, stirring, scavenging to obtain scavenged concentrate and flotation tailings, and returning the scavenged concentrate to the previous stage of roughing for recleaning, carrying out concentration on the obtained roughing concentrate for multiple times, and returning the concentrated tailings to the previous stage for flotation till an ideal flotation index is achieved. The flotation concentrate with a high uranium grade and arecovery rate can be obtained.

Description

technical field [0001] The invention belongs to the technical field of beneficiation, in particular to a flotation method for crystalline uranium ore. Background technique [0002] Crystalline uranium ore is the main industrial uranium mineral found in many giant uranium mines in the world, such as Canada, Australia, South Africa, the United States, Namibia, Niger, Brazil, Russia and Kazakhstan. It is produced in some large and medium-sized uranium mines in the Nanling, Qinling, Tianshan, Yanliao, and western Yunnan regions of China. In my country, crystalline uranium ore is generally directly leached, while the grade of uranium in our crystalline uranium ore is low, generally below 0.1%, and the uranium in crystalline uranium ore is tetravalent uranium, which requires more consumption in the leaching process. A large amount of oxidant is required, so the production cost is high. If the crystalline uranium ore can be enriched by flotation and most of the gangue minerals can ...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D1/02B03D101/02B03D101/00B03D103/04
CPCB03D1/018B03D1/025B03D2201/007B03D2201/02B03D2203/04Y02P10/20
Inventor 刘志超李广
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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