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Selective oxygen pressure leaching method for the enrichment of precious metals from high-iron, high-copper and nickel-containing materials

An oxygen pressure leaching and precious metal technology, which is applied to the system of selective oxygen pressure leaching and enriching of precious metals for high iron and high copper nickel-containing materials. Open circuit, long process flow, precious metal dispersion loss, etc.

Active Publication Date: 2019-09-17
SHENZHEN KUNPENG METALLURGY ENG TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for selective oxygen pressure leaching of high-iron, high-copper and nickel-containing materials to enrich precious metals, aiming to solve the existing problems in the smelting process of nickel sulfide ore, such as long process flow, low yield, high cost, and insufficient iron Achieving technical problems such as open circuit, large amount of waste water, and loss of precious metal dispersion

Method used

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  • Selective oxygen pressure leaching method for the enrichment of precious metals from high-iron, high-copper and nickel-containing materials

Examples

Experimental program
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Effect test

Embodiment 1

[0114] A kind of high-speed iron with the composition (%) of: Ni~30, Cu~20, Fe~20, Co~0.7, S~25, ∑Pt (including Au, Pd, Pt, the same below)~10g / t, The method for enriching precious metals by selective oxygen pressure leaching of copper-nickel-containing materials comprises the following processing steps:

[0115] S10. Purification and impurity removal, mixing oxygen pressure iron removal solution and oxygen pressure leaching nickel solution to prepare pre-purification and impurity removal liquid, mixing and stirring the prepared pre-purification and impurity removal liquid with iron-high-copper-nickel minerals, and slurrying initial Cu 2+ The concentration is 10g / L, the liquid-solid ratio is 6:1, and the slurrying time is 1h. The purification and impurity removal process controls the temperature at 85°C and the air volume at 1500NM 3 / t of material, the time for purification and removal of impurities is 6 hours, and the pH value of the end point of the removal reaction is 6.0...

Embodiment 2

[0121] A selective oxygen pressure leaching enrichment of high-iron, high-copper and nickel-containing materials with the composition (%): Ni~60, Cu~5, Fe~15, Co~1.2, S~12, ∑Pt~110g / t A method for precious metals comprising the following processing steps:

[0122] S10. Purification and impurity removal, mixing oxygen pressure iron removal solution and oxygen pressure leaching nickel solution to prepare pre-purification and impurity removal liquid, mixing and stirring the prepared pre-purification and impurity removal liquid with iron-high-copper-nickel minerals, and slurrying initial Cu 2+ The concentration is 10g / L, the liquid-solid ratio is 8:1, and the slurrying time is 1h. The purification and impurity removal process controls the temperature at 85°C and the air volume at 1500NM 3 / t of material, the purification and removal time is 6h, and the pH value at the end of the removal reaction is 5.9. After purification and removal of impurities, the slurry is subjected to liq...

Embodiment 3

[0128] A selective oxygen pressure leaching enrichment of high-iron, high-copper and nickel-containing materials with the composition (%) of: Ni~40, Cu~15, Fe~15, Co~2.5, S~25, ∑Pt~20g / t A method for precious metals comprising the following processing steps:

[0129] S10. Purification and impurity removal, mixing oxygen pressure iron removal solution and oxygen pressure leaching nickel solution to prepare pre-purification and impurity removal liquid, mixing and stirring the prepared pre-purification and impurity removal liquid with iron-high-copper-nickel minerals, and slurrying initial Cu 2+ The concentration is 8g / L, the liquid-solid ratio is 6:1, and the slurrying time is 1h. The purification and impurity removal process controls the temperature at 85°C and the air volume at 1500NM 3 / t of material, the purification and removal time is 6h, and the pH value at the end of the removal reaction is 6.2. After purification and removal of impurities, the slurry is subjected to l...

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Abstract

The invention belongs to the technical field of nonferrous metallurgy, and particularly relates to a selective oxygen pressure leaching method for the enrichment of precious metals from high-iron, high-copper and nickel-containing materials. The method comprises the following steps of purification and impurity removal, normal-pressure leaching, oxygen-pressure deironing, oxygen-pressure nickel immersion and oxygen-pressure copper immersion. The method is short in technological process and high in direct yield, and can be used for selectively leaching nickel, cobalt, copper and iron and respectively realizing open circuit; and the method is wide in raw material adaptability, suitable for treating various high-iron high-copper nickel-containing materials such as intermediate product low-nickel matte generated in the conventional nickel sulfide ore smelting process, primary alloys, fine grain alloys, cobalt-rich low-nickel matte and cobalt-rich matte, and is remarkable in benefit. The nickel sulfate cobalt sulfate solution obtained by adopting the method is high in the product quality, and the requirements of multi-variety production can be met at the same time; the noble metal can be totally enriched in the oxygen pressure leaching copper slag and can be used as a noble metal concentrate, the direct yield and the enrichment ratio are high, and iron is directly used in a product form; and copper is leached to obtain a copper sulfate solution, and crystallized copper sulfate or electrodeposition copper can be produced.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy of non-ferrous metals, and relates to a method for enriching precious metals by selective oxygen pressure leaching of high-iron, high-copper and nickel-containing materials, and a system for selective oxygen pressure leaching and enrichment of noble metals for high-iron, high-copper and nickel-containing materials . Background technique [0002] The traditional treatment method for smelting nickel sulfide ore is to use pyrolysis blowing after beneficiation to reduce the content of calcium, magnesium, silicon and some iron in the material. This process causes part of the cobalt to circulate in the pyrometallurgy system, and about 45% of the cobalt is with the pyrometallurgical slag. Loss, while losing part of nickel and precious metals. The high-nickel matte produced by the fire method is subjected to grinding and floating separation, resulting in serious dispersion loss of precious metals...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/00C22B15/00C22B23/00
CPCC22B7/006C22B7/007C22B11/042C22B15/0067C22B23/0415Y02P10/20
Inventor 赵志明
Owner SHENZHEN KUNPENG METALLURGY ENG TECH LTD
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