Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for reducing leaching alkali consumption of gypsum-rich alkaline uranium ore

A uranium ore and leaching technology, which is applied in the field of reducing alkali consumption in the leaching of gypsum-rich alkaline uranium ore, can solve the problems of reducing ore processing volume and high leaching alkali consumption, and achieves reduction in ore processing volume, lower leaching alkali consumption, and residual alkali Take advantage of the maximum effect

Active Publication Date: 2016-08-31
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to separate most of the gypsum minerals in the ore under the condition that the uranium grade of the coarse-grained ore is not higher than 0.02%, reduce the amount of ore processing, and solve the leaching alkali consumption of the ore due to excessive gypsum content. High problem, to achieve the purpose of reducing the cost of ore processing

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for reducing leaching alkali consumption of gypsum-rich alkaline uranium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A certain argillaceous sandstone uranium ore contains 0.110% uranium, CO 2 The gypsum content is 7.4%, the gypsum content is 25.2%, and the raw ore direct leaching alkali consumption is 18.9%. Process the ore as follows:

[0023] 1) The ore is crushed to make natural size pulp;

[0024] 2) After crushing, the ore pulp is classified with a 60-mesh vibrating screen, and the coarse-grained ore is directly discarded;

[0025] 3) BF7605 flocculant with a concentration of 0.1% is added to the fine-grained ore pulp, and the addition amount is 40g / t ore, and the neutral and dense overflow returns to the ore crushing process;

[0026] 4) The underflow ore pulp is controlled by adding adsorption tail liquid to a leaching liquid-solid ratio of 4:1, adding 7.5wt% (fine-grained ore mass) sodium carbonate, and stirring and leaching at 90°C for 2 hours;

[0027] 5) Add AZ5005 flocculant with a concentration of 0.1% to the ore pulp after leaching, and the addition amount is 240g / t o...

Embodiment 2

[0032] An argillaceous sandstone-type uranium ore contains 0.073% uranium, 11.0% CO2, 19.1% gypsum, and 7.5% alkali consumption for direct leaching of raw ore. Process the ore as follows:

[0033] 1) The ore is crushed to make natural size pulp;

[0034] 2) After crushing, the ore pulp is classified with a 100-mesh vibrating screen, and the coarse-grained ore is directly discarded;

[0035] 3) BF7605 flocculant with a concentration of 0.1% is added to the fine-grained ore pulp, and the addition amount is 45g / t ore, and the neutral and dense overflow returns to the ore crushing process;

[0036] 4) Control the leach liquid-solid ratio to 5:1 by adding adsorption tail liquid to the underflow pulp, add 7.0wt% (fine-grained ore mass) sodium carbonate, and stir and leach at 90°C for 2 hours;

[0037] 5) Add AZ5005 flocculant with a concentration of 0.1% to the ore pulp after leaching, and the addition amount is 230g / t ore. After 5 stages of countercurrent washing, leachate and ta...

Embodiment 3

[0042] A certain argillaceous sandstone uranium ore contains 0.090% uranium, 9.0% CO2, 20.4% gypsum, and 9.1% alkali consumption for direct leaching of raw ore. Process the ore as follows:

[0043] 1) The ore is crushed to make natural size pulp;

[0044] 2) After crushing, the ore pulp is classified with an 80-mesh vibrating screen, and the coarse-grained ore is directly discarded;

[0045] 3) Add BF7605 flocculant with a concentration of 0.1% to the fine-grained ore pulp, and the addition amount is 35g / t ore, and the neutral and dense overflow returns to the ore crushing process;

[0046] 4) The underflow ore pulp is controlled by adding adsorption tail liquid to a leaching liquid-solid ratio of 4:1, adding 7.5wt% (fine-grained ore mass) sodium carbonate, and stirring and leaching at 90°C for 2 hours;

[0047]5) After leaching, add AZ5005 flocculant with a concentration of 0.1% to the ore slurry, and the addition amount is 220g / t ore. After 5 stages of countercurrent washi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for lowering leaching alkali consumption of alkaline uranium ore rich in gypsum. The method comprises the following steps: breaking ores; grading; neutrally thickening; leaching; thickening and washing; carrying out ion exchange adsorption; washing; and the like. The method has the benefits that (1) the ores are directly graded after being broken, and fine-sized ore can be directly leached without ore grinding, so that the ore grinding cost is reduced; (2) most of gypsum minerals are abandoned, so that the leaching alkali consumption is lowered, and meanwhile, the processing capacity of the ores is reduced; and (3) adsorption tail liquid is returned to the leaching and thickening and washing procedures, so that maximization of waste alkali utilization is achieved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy of uranium ores, and in particular relates to a method for reducing alkali consumption in leaching of alkaline uranium ores rich in gypsum. Background technique [0002] Alkaline uranium ore accounts for more than 30% of the total proven uranium resources in my country. Alkaline uranium ore is rich in carbonate minerals and is generally treated by alkaline leaching process. The main alkali-consuming minerals in alkaline leaching include sulfide ore (mainly pyrite), calcium-magnesium sulfate, pentavalent oxides of vanadium and phosphorus, and organic matter; in addition, when the leaching temperature is high, the acidic components of the ore (Silicon oxide, aluminum oxide, etc.) can also react with carbonate to consume a certain amount of alkali. [0003] For the alkaline uranium ore with high alkali consumption in the leaching process, different methods can be used for the treatment accor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B3/24C22B60/02
CPCY02P10/20
Inventor 刘忠臣李伟才向秋林贾秀敏黄永陈天宝刘会武张宝恩李培佑武翠莲
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY