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A kind of pretreatment method of low-grade uranium ore

A low-grade, pretreatment technology, applied in the field of uranium pretreatment, can solve the problems of long time, high energy consumption, aggravation of secondary pollution and damage to the original ecological environment, and achieve the effect of low cost and cheap raw materials

Active Publication Date: 2020-11-03
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing uranium ore pretreatment mainly includes methods such as crushing, grinding, magnetic separation and enrichment, and high-temperature roasting. Although crushing, grinding, and magnetic separation and enrichment can improve the quality of uranium ore to a certain extent, they will increase the tailings production. It also aggravates the problem of secondary pollution and damage to the original ecological environment in the process of beneficiation and mining and metallurgy; although high-temperature roasting can improve the solubility of useful components of ore or improve the physical properties of ore to a certain extent, the process of high-temperature roasting and disposal takes a long time. Long-term, high energy consumption, and a large amount of waste gas containing high concentration of sulfur dioxide will be generated during the disposal process

Method used

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  • A kind of pretreatment method of low-grade uranium ore
  • A kind of pretreatment method of low-grade uranium ore
  • A kind of pretreatment method of low-grade uranium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Effect of the mass percentage of disodium lauryl polyoxyethylene ether sulfosuccinate and iron tailings on the leaching rate of uranium from modified low-grade uranium ore powder:

[0022] Weigh iron tailings, lauryl polyoxyethylene ether sulfosuccinic acid monoester disodium, manganese dioxide respectively, mix and grind for 2 hours, and pass through a 100 mesh sieve to obtain iron tailings grinding powder, wherein, twelve The mass percentages of disodium alkylpolyoxyethylene ether sulfosuccinate monoester and iron tailings are 0.1%, 0.2%, 0.5%, 0.8%, 1%, 2%, 3%, 4%, 5%, 5.5%, 6%, 7%; the mass percentage of manganese dioxide and iron tailings is 1%; the iron tailings ground powder is mixed with water, stirred for 1 hour, dried at 100°C to constant weight, and ground to obtain Active iron tailings oxidant: according to the mass percentage of active iron tailings oxidant and uranium tailings 2%, weigh uranium tailings and active iron tailings oxidant respectively, mix an...

Embodiment 2

[0029] The effect of the mass percentage of manganese dioxide and iron tailings on the leaching rate of modified low-grade uranium ore powder:

[0030] Weigh iron tailings, lauryl polyoxyethylene ether sulfosuccinate disodium, and manganese dioxide respectively, mix and grind for 4 hours, and pass through a 200-mesh sieve to obtain iron tailings grinding powder, wherein, twelve The mass percentage of alkyl polyoxyethylene ether monosodium sulfosuccinate and iron tailings is 5%, and the mass percentages of manganese dioxide and iron tailings are 0.1%, 0.2%, 0.5%, 0.8%, and 1% respectively. %, 2%, 3%, 4%, 5%, 5.5%, 6%, 7%; mix iron tailings grinding powder with water, stir for 2 hours, dry at 110°C until constant weight, and grind to obtain Active iron tailings oxidant: according to the mass percentage of active iron tailings oxidant and uranium tailings 4%, weigh uranium tailings and active iron tailings oxidant respectively, mix and grind for 4 hours, pass through a 200 mesh s...

Embodiment 3

[0035] Effect of active iron tailings oxidant and uranium tailings mass percentage on leaching rate of modified low-grade uranium ore powder:

[0036] Weigh the iron tailings, disodium lauryl polyoxyethylene ether sulfosuccinate, and manganese dioxide respectively, mix and grind for 6 hours, and pass through a 300-mesh sieve to obtain the iron tailings grinding powder, wherein, twelve The mass percent of disodium alkyl polyoxyethylene ether sulfosuccinate monoester and iron tailings is 5%, and the mass percent of manganese dioxide and iron tailings is 5%; the iron tailings ground powder is mixed with water, stirred 3 hours, dry to constant weight at 120°C, grind to obtain active iron tailings oxidant; according to the mass percentage of active iron tailings oxidant and uranium tailings: 0.2%, 0.6%, 1%, 1.4%, 1.8%, 2 %, 3%, 4%, 5%, 6%, 7%, 8%, 9.5%, 9%, and 10%, respectively weigh uranium tailings and active iron tailings oxidant, mix and grind for 6 hours, pass through 300 mes...

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Abstract

The invention discloses a pretreatment method for low-grade uranium ore. (1) Iron tailings, a sulfonate anionic surfactant and manganese dioxide are weighed, mixed, grinded and sieved to obtain iron tailings grinded powder; (2) the iron tailings grinded powder is dissolved in water, stirred, dried to constant weight and grinded to obtain an active iron tailings oxidant; (3) uranium tailings and the active iron tailings oxidant are weighed, mixed, grinded and sieved to obtain uranium ore grinded powder; and (4) the uranium ore grinded powder is dissolved in water, stirred, microwave dried to constant weight and grinded to obtain modified low-grade uranium ore. The pretreated modified low-grade uranium ore is leached in a sulfuric acid solution of 10 g / L for 12 hours, and an uranium leachingrate is as high as 98%. Untreated low-grade uranium ore is leached in a sulfuric acid solution of 50 g / L for 168 hours, and an uranium leaching rate is only 49%. The pretreatment method of the invention is simple and has no secondary pollution, and the used raw materials are inexpensive.

Description

technical field [0001] The invention relates to a pretreatment method of uranium ore, in particular to a pretreatment method of low-grade uranium ore. Background technique [0002] In the process of uranium mining, a large amount of low-grade uranium tailings and leaching slag are produced. Low-grade uranium ore resources are mainly associated uranium ores such as uranium tailings, uranium tailings, phosphorite, titanium-uranium ore, etc. The content is much lower than the uranium content in conventional uranium ore. The main phase of low-grade uranium ore is a variety of silicate components, including iron silicate, calcium silicate, aluminum silicate, etc. In low-grade uranium ore, uranium is usually dispersed in the form of ultrafine particles Silicate minerals and partly exist as insoluble tetravalent uranium. Due to the difficulty and high cost of recovering uranium from low-grade uranium ores, the current stockpile of low-grade uranium ore resources in the world has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B60/02
CPCC22B60/0208C22B60/0213
Inventor 黄涛宋东平刘万辉李爱英周璐璐
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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