Selective bioleaching process of high-iron and low-grade nickel sulfide ore

A technology of biological leaching and nickel sulfide ore, applied in the direction of improving process efficiency, etc., can solve the problem of high recovery cost of valuable metals, achieve high added value of products, reduce iron removal costs, and reduce treatment costs
CN109929996BActive Publication Date: 2020-12-08有研资源环境技术研究院(北京)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
有研资源环境技术研究院(北京)有限公司
Publication Date
2020-12-08

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Abstract

The invention provides a high-iron low-grade nickel sulfide ore selective biological leaching process. The process comprises the following steps of stirring and leaching, selective leaching, deironing, extraction, reverse extraction and electrodeposition, then obtaining a cathode nickel. According to the process, in particular with respect to a flotation nickel sulfide ore concentrate with high iron content and low nickel grade, a stirring biological leaching process is adopted, measures for controlling growth, pH value, temperature and ventilatory capacity of vulcanized bacteria are adopted,redox potential in the leaching process is controlled, dissolution of iron-containing sulfide minerals such as pyrite is effectively inhibited, and selective leaching of the nickel-containing sulfidemineral is realized. The process is short in procedure, simple in equipment, saving in investment, low in cost, free of pollution, high in valuable metal recovery rate and capable of treating low-grade nickel sulfide ore resources which cannot be treated by a pyrogenic process smelting process, utilization range of resources can be expanded, comprehensive recovery level of the nickel metal is improved, and economic benefits, social benefits and environmental benefits of the process is remarkable.
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Description

technical field

[0001] The invention belongs to the field of biometallurgy of nonferrous metals, and relates to a selective bioleaching process of nickel sulfide ore, in particular to a biostirring leaching process of flotation nickel sulfide concentrate with high iron content and low nickel grade. Background technique

[0002] With the continuous mining of mineral resources, the ore tends to be poor and hybridized gradually, with high content of toxic metal ions and impurity minerals, and a close relationship of polymetallic associations. In nature, nickel mainly exists in the form of compounds, and 1 / 2 to 2 / 3 occurs in sulfide minerals in the form of isomorphism. Among them, nickel sulfide ore mainly includes nickel pyrrhotite, chalcopyrite, sulfur nickel diamond ore and sulfur diamond iron ore, etc. my country's nickel ore is dominated by copper nickel sulfide ore, accounting for 86% of the country's total reserves. However, as the grade of nickel resources continues to ...

Claims

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