A method for bacteria leaching uranium from carbon-silicon mudstone-type uranium ore

A technology of uranium ore and carbon-silicon, which is applied in the field of efficient uranium leaching by bacteria, can solve problems such as the limitation of extensive development and utilization of uranium ore, low grade of uranium in ore, and economic unfeasibility, so as to avoid the use of sulfuric acid and oxidant and achieve high recovery rate of uranium , the effect of expanding resource utilization
CN105714115BInactive Publication Date: 2018-03-13EAST CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
EAST CHINA UNIV OF TECH
Publication Date
2018-03-13
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for leaching uranium by bacteria of carbon-silicon mudstone type uranium ore, which comprises the following steps: (1) making carbon-silicon mudstone-type uranium with organic carbon content greater than or equal to 12.57%, sulfur content greater than or equal to 1.18%, and iron content greater than or equal to 4.19% The uranium ore was crushed to a particle size of less than 30 mm; (2) The acidic pit water and uranium ore collected from the target carbon-silicon mudstone-type uranium mining area were enriched to obtain active mixed bacteria. , the oxidation rate of ferrous iron reaches 0.22Β±0.02g / (L h); (3) Put the crushed ore into the test column for sulfuric acid acidification leaching of uranium; (4) Spray the prepared bacterial oxidant to the acidification pre-treatment Bacterial oxidative uranium leaching is carried out in the ore after leaching; (5) The adsorption tail liquid is circulated and sprayed into the uranium ore after bacterial oxidation leaching for tailing liquid oxidative uranium leaching. It has the characteristics of low energy consumption, high uranium recovery rate, and environmental friendliness.
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Description

technical field

[0001] The invention belongs to the technical field of microbial hydrometallurgy, and relates to a method for efficiently leaching uranium by bacteria from low-grade carbon-silicon mudstone-type uranium ore. Background technique

[0002] Uranium resources are not only strategic materials urgently needed for national defense construction in our country, but also essential energy materials in economic construction. The carbon-silicon mudstone type uranium deposit is one of the four major types of uranium deposits in my country. Among them, the uranium-containing black rock series type belongs to the type of unconventional uranium resources in my country. The mudstone layer is stable and thick, and it is rich in organic matter, pyrite, and mud , silicon and phosphorus, and the uranium content is mainly between 0.01% and 0.05%. It has considerable reserves and is widely distributed in my country.

[0003] Due to the high degree of reduction of carbon-silicon muds...

Claims

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