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Pretreatment method for mud uranium ores

A uranium ore and pretreatment technology, applied in the field of uranium mining and metallurgy, can solve the problems of increasing reagent consumption and achieve the effects of saving reagent consumption, increasing leaching rate, and reducing reagent consumption

Active Publication Date: 2017-07-14
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

The direct flotation of carbonate from uranium ore needs to grind the ore to a certain particle size, and the gypsum minerals will enter the beneficiation products, which will increase the consumption of reagents during alkaline leaching

Method used

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  • Pretreatment method for mud uranium ores

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A certain argillaceous uranium ore rich in gypsum and carbonate minerals, gypsum grade 13.50%, CO 2 The grade is 9.35%, and the uranium grade is 0.075%.

[0037] (1) Mix the ore and water at a ratio of 1:3, stir with an electric mixer at a stirring speed of 300r / min for 60 minutes to disperse, and use a 150-mesh sieve to divide it into two grades: +150 mesh coarse-grained ore and -150-mesh fine-grained ore . The yield rate of +150 mesh coarse-grained ore was 23.50%, the grade of gypsum was 47.39%, and the recovery rate was 82.5%; CO 2 The grade is 3.06%, and the recovery rate is 7.71%. The yield of -150 mesh coarse-grained ore is 76.50%, the grade of gypsum is 3.09%, and the recovery rate is 17.50%; CO 2 The grade is 11.28%, and the recovery rate is 92.29%.

[0038] (2) Mix -150 mesh fine-grained ore into a slurry with a concentration of 30%, put it into a flotation tank, and adjust the temperature of the slurry to 30°C. Add water glass 4000g / t to suppress and disp...

Embodiment 2

[0040] A certain argillaceous uranium ore rich in gypsum and carbonate minerals, gypsum grade 13.85%, CO 2 The grade is 9.73%, and the uranium grade is 0.072%.

[0041] (1) Mix the ore and water according to the ratio of 1:2, stir with an electric mixer at a stirring speed of 600r / min for 20 minutes to disperse, and use a 100-mesh sieve to divide it into two grades: +100 mesh coarse-grained ore and -100-mesh fine-grained ore . The yield of +100 mesh coarse-grained ore was 19.60%, the grade of gypsum was 56.39%, and the recovery rate was 79.80%; CO 2 The grade is 2.46%, and the recovery rate is 4.97%. The yield of -150 mesh coarse-grained ore is 80.40%, the grade of gypsum is 3.48%, and the recovery rate is 20.20%; CO 2 The grade is 11.50%, and the recovery rate is 95.03%.

[0042] (2) Make -100 mesh fine-grained ore into slurry with a concentration of 30%, and put it into a flotation tank, and the temperature of the slurry is 35°C. The flotation operation adopts a closed-...

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Abstract

The invention belongs to the technical field of uranium mining and metallurgy, and relates to a pretreatment method for mud uranium ores, in particular to a pretreatment method of mud uranium ores rich in gypsum and carbonate minerals. According to the pretreatment method for the mud uranium ores, firstly coarse-grained ores rich in the gypsum are separated, and the coarse-grained ores can recycle uranium through a dump leaching method, the ores grinding cost can be saved and the reagent consumption when fine-grained ores are leached through a alkaline process can be reduced. The fine-grained ores rich in the carbonate minerals are divided into two parts of high-carbonated uranium ores and low-carbonated uranium ores through a flotation method; the uranium can be recycled through subtractive leaching and acid leaching in the follow-up leaching, the reagent consumption can be saved, and the leaching rate is improved.

Description

technical field [0001] The invention belongs to the technical field of uranium mining and metallurgy, and relates to a pretreatment method of argillaceous uranium ore, in particular to a pretreatment method of argillaceous uranium ore rich in gypsum and carbonate minerals. Background technique [0002] my country's uranium ores have the characteristics of many types and complexity, mostly low-grade and medium-grade uranium ores, and a relatively large proportion of refractory uranium ores. Therefore, for different uranium ores, choose low processing costs, good economic benefits, and environmentally friendly recycling processes. Among them, uranium is particularly necessary. Pretreatment of low-grade and complex uranium ores is an effective method to improve the recovery effect of ore leaching and reduce production costs. [0003] When argillaceous uranium ore rich in gypsum and carbonate minerals is directly stirred and leached, due to the high content of carbonate minerals...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03D1/02C22B60/02
CPCB03B7/00B03D1/025C22B60/0208
Inventor 刘志超李广强录德李春凤刘忠臣赵凤岐
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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