Sulfide-oxidized mixed ore treatment process

A treatment process and mixed ore technology, which is applied in the field of oxygen-sulfur mixed ore treatment process, can solve the problems of reducing the oxygen content of ore pulp, affecting the leaching rate, and insufficient aeration, so as to save production costs, reduce sodium cyanide consumption, and avoid Effect of sulfide mineral reaction

Inactive Publication Date: 2017-10-27
鹤庆北衙矿业有限公司
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Problems solved by technology

In the traditional cyanide leaching, the aeration is insufficient, and the oxygen in the pulp will react with the sulfide to oxidize the sulfide, which greatly reduces the oxygen content in the pulp, reduces the solubility of gold, silver and other metals, and affects the leaching rate

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  • Sulfide-oxidized mixed ore treatment process

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Embodiment Construction

[0027] An oxygen-sulfur mixed ore treatment process, the treatment process comprises three sections of grinding and classification, cyanide leaching and magnetic separation, specifically carried out according to the following steps:

[0028] (1) Grinding and classifying section:

[0029] Add 30kg / t of lime powder to the original oxygen-sulfur mixed ore, and send it to the semi-autogenous mill by the ore feeding belt. The semi-autogenous mill crushes the oxygen-sulfur mixed ore and makes the lime powder evenly mixed in the ore. The semi-autogenous mill discharges ore and adds water to become coarse ore pulp, which is transported to the cyclone group by the mortar pump for classification. The sand settling in the cyclone group enters the ball mill for secondary grinding, and the ore discharge of the ball mill of the secondary grinding is combined with the discharge of the semi-autogenous mill, and the mortar is pumped to the cyclone for classification again. The second-stage gr...

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Abstract

The invention belongs to the technical field of ore dressing and particularly relates to a sulfide-oxidized mixed ore treatment process. The sulfide-oxidized mixed ore treatment process includes three sections namely ore grinding and classification, cyanidation leaching and magnetic separation. Due to high sulfur content in treated sulfide-oxidized mixed ore, a great quantity of lime is added at the ore grinding and classification section to accelerate oxidation of sulfide ore in advance, and a PH value in ore pulp can be constantly kept in a range of 10-12 to achieved a protection alkali function; during secondary grinding, sodium cyanide is removed to avoid reaction between sodium cyanide with sulfide ore in the sulfide-oxidized mixed ore, sodium cyanide consumption is reduced, and production cost is saved; oxygen-rich leaching is adopted at the cyanidation leaching section, and an oxygen-rich environment accelerates sulfide ore oxidation to realize passivation in sodium cyanide solution, so that reaction with sodium cyanide is avoided, and unit consumption of sodium cyanide is reduced; by preparation of the oxygen-rich ore pulp high in cyanide content, the leaching rate of metals such as gold and silver is increased, pulp volume is decreased due to high-concentration leaching, and sodium cyanide consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of ore beneficiation, and in particular relates to an oxygen-sulfur mixed ore treatment process. Background technique [0002] Part of the oxygen-sulfur mixed ore (mixed ore of oxide ore and sulfide ore) is mined during the mining process. Due to the large difference in properties between this part of the oxygen-sulfur mixed ore and the current ore, it is necessary to develop a reasonable mineral processing technology to deal with this part of the oxygen-sulfur mixed ore. mine. According to the ore properties, cyanide gold extraction test and flotation test research were carried out on the comprehensive sample, and the magnetic separation iron separation test was carried out on the comprehensive ore sample cyanide tailings. [0003] The traditional all-sliming cyanidation process is only used to treat oxidized ore. The grinding and grading section adopts a two-stage closed-circuit grinding process consistin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 汪勇尹福兴龚明辉段胜红白忠荣
Owner 鹤庆北衙矿业有限公司
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