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A method for copper-based solid waste collaborative smelting enrichment and extraction of precious metals

A precious metal, copper-based technology, applied in the field of copper-based solid waste co-smelting process for enrichment and extraction of precious metals, can solve the problems of high processing cost, large output of three wastes, poor material adaptability, etc. less volatile effect

Active Publication Date: 2021-08-17
广州华瑞环境科技有限公司
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Problems solved by technology

Although the hydrometallurgical method has the advantages of simple process, good metal separation effect and high metal recovery rate, it has the disadvantages of poor material adaptability, high treatment cost and large output of three wastes, making it difficult to widely promote the method

Method used

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  • A method for copper-based solid waste collaborative smelting enrichment and extraction of precious metals

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Embodiment 1

[0023] The copper-based solid waste described in the present invention has two kinds, the first kind of electroplating sludge, the mass percentage content of its main component is: Cu12.35% and Au12g / t; The second kind is wet-process copper sludge, its main The mass percentage of the components is: Cu32.0% and Au40g / t; the mass percentage of the main component of sodium pyroantimonate is: NaSb(OH) 6 98.2%, the mass percentage of FeO in iron ore is 58.44%, the mass percentage of CaO in limestone is 48.5%, and the FeS in pyrite 2 The mass percentage is 85.3%.

[0024] First, sodium pyroantimonate, starch and water are mixed according to the weight ratio of 100:5.0:6.0 and then granulated to keep the particle size of sodium pyroantimonate at 1.5mm. Then sodium pyroantimonate pellets, copper-based solid waste and yellow The iron ore is mixed with ingredients so that the contents of antimony, copper and sulfur in the mixture are kept at 0.80%, 26.5% and 18.0% respectively. Second...

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Abstract

A method for copper-based solid waste collaborative smelting, enrichment, and extraction of precious metals. Firstly, sodium pyroantimonate and starch are mixed and granulated, and then mixed with copper-based solid waste, and the content of antimony, copper and sulfur in the mixed material is controlled within the required range; Secondly, oxygen-enriched air is oxidized and smelted at high temperature, and Sb(Ⅴ) in sodium pyroantimonate is reduced to metal by starch and enriched in copper matte after interacting with precious metals in copper-based solid waste; Sodium pyroantimonate pellets are added to it, sodium pyroantimonate is reduced to metal antimony and then forms a gold-rich alloy with the precious metal in the copper matte, and the gold-rich alloy settles on the bottom layer of the gold-poor copper matte, and the gold-rich alloy is used to extract the precious metal. The gold-poor copper matte further extracts copper. The core of the present invention is that sodium pyroantimonate has low volatility at high temperature and is easy to be reduced by starch to realize the step-by-step enrichment of precious metals; the present invention has the advantages of strong raw material adaptability, high recovery rate of precious metals and simple process flow.

Description

technical field [0001] The invention relates to a pyrometallurgical process in the field of nonferrous metallurgy, in particular to a pyrometallurgical method for enriching and extracting precious metals in a copper-based solid waste collaborative smelting process. Background technique [0002] Based on the excellent physical and chemical properties of copper, it is widely used in various fields such as electrical, defense industry, light industry, machinery manufacturing and construction. It is second only to aluminum in the consumption of non-ferrous metal materials in my country. At present, the proportion of copper use is roughly as follows: 48-49% in the electrical industry, 19-20% in the communication industry, 14-16% in construction, 7-10% in transportation, and 7-9% in home appliances and others. Due to the growth of the global economy, the demand for copper has increased significantly, and the world production and consumption have basically remained the same. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B11/02C22B15/00C22B1/248
CPCC22B1/248C22B7/001C22B11/021C22B15/0028C22B15/0056Y02P10/20
Inventor 刘伟锋张杜超陈霖杨天足贾锐张坤坤
Owner 广州华瑞环境科技有限公司
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