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Process of enriching noble metal from sulfide copper nickle mineral

A copper-nickel sulfide ore and precious metal technology, applied in chemical instruments and methods, process efficiency improvement, solid separation and other directions, can solve the problems of complicated, lengthy, low recovery rate, etc., to prevent dispersion loss, short process flow, The effect of improving the recovery rate

Inactive Publication Date: 2007-07-18
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For traditional copper-nickel mineral raw materials containing low-grade gold, silver and platinum group precious metals (only a few grams to tens of grams per ton), since the precious metals are enriched in the process of extracting base metals such as nickel and copper, the process is complicated and difficult. Lengthy, precious metals are dispersed into various by-products, so the loss is large and the recovery rate is low, making it impossible to recover a large amount of gold, silver and platinum group precious metals, forming a permanent loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The nickel sulfide concentrate containing 8% nickel, 4% copper, 2g / t precious metal, and 100t in mass is smelted in an electric furnace at a temperature of 1200-1300°C, and then blown in a converter to control the iron content of the melt at the end of blowing. 0.8%, high nickel matte with 8% sulfur content. The high-nickel matte was slowly cooled in the heat preservation pit for 72 hours. After crushing and grinding, the magnetic separator with a field strength of 1800Oe was selected to obtain 1.2t nickel-copper alloy containing 78% nickel, 16% copper and 4% sulfur , Precious metal 160g / t. The nickel-copper alloy is melted at a temperature of 1300°C and quenched with water to form metal particles of 1-15mm in size. The alloy particles after water quenching are put into the synthesis reaction kettle, and the carbon monoxide gas with a purity of 80% is continuously introduced from the lower part of the synthesis reaction kettle. The pressure in the control reactor is 5M...

Embodiment 2

[0035] The nickel sulfide concentrate containing 12% nickel, 5% copper, 5g / t precious metal, and 100t in mass is smelted in an electric furnace at a temperature of 1200-1300°C, and then blown in a converter to control the iron content of the melt at the end of blowing. 0.4%, high nickel matte with 7% sulfur content. The high-nickel matte was slowly cooled in the heat preservation pit for 80 hours. After crushing and grinding, the magnetic separator with a field strength of 2000Oe was selected to obtain 1.4t nickel-copper alloy containing 80% nickel, 14% copper and 3% sulfur , Precious metal 350g / t. The nickel-copper alloy is melted at a temperature of 1350°C and quenched with water to form metal particles of 1-15mm in size. The alloy particles after water quenching are put into the synthesis reaction kettle, and the carbon monoxide gas with a purity of 86% is continuously introduced from the lower part of the synthesis reaction kettle. The pressure in the control reactor is 1...

Embodiment 3

[0037]The nickel sulfide concentrate containing 16% nickel, 6% copper, 10g / t precious metal, and 100t in mass is smelted in an electric furnace at a temperature of 1200-1300°C, and then blown in a converter to control the iron content of the melt at the end of blowing. 1.0%, high nickel matte with 10% sulfur content. The high-nickel matte was slowly cooled in the heat preservation pit for 72 hours. After crushing and grinding, the magnetic separator with a field strength of 2400Oe was selected to obtain 1.8t nickel-copper alloy containing 68% nickel, 18% copper and 8% sulfur , Precious metal 550g / t. The nickel-copper alloy is melted at a temperature of 1400°C and quenched with water to form metal particles of 1-15mm in size. The alloy particles after water quenching are put into the synthesis reaction kettle, and the carbon monoxide gas with a purity of 90% is continuously introduced from the lower part of the synthesis reaction kettle. The pressure in the control reactor is ...

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Abstract

The process of enriching noble metal from copper sulfate nickel ore with low grade noble metal content includes the successive steps of: 1. smelting copper sulfate nickel ore at 1200-1300 deg.c and converter blowing to obtain metallized nickel matte melt; 2. cooling metallized nickel matte melt, crushing, milling and magnetically separating to obtain Ni-Cu alloy; 3. smelting the Ni-Cu alloy, and water quenching the melt to obtain alloy grain; and 4. hydroxydizing the alloy grain with CO gas to produce gaseous carbonyl nickel, decomposing the gaseous carbonyl nickel in a ecomposer to obtain carbonyl nickel powder product, and feeding the noble metal residue to noble metal extracting process. The technological process of the present invention is short, low in cost, environment friendly and high in noble metal recovering rate.

Description

technical field [0001] A method for enriching precious metals from copper-nickel sulfide ores relates to a method for extracting precious metals from copper-nickel sulfide ores containing low-grade precious metals. Background technique [0002] Nickel sulfide, copper-nickel sulfide, and nickel-copper alloy are the raw materials for extracting nickel-copper. Generally, nickel sulfide, copper sulfide, nickel-copper sulfide ore and nickel-copper alloy are associated with a certain amount of gold, silver and platinum group precious metals. [0003] For the above-mentioned mineral raw materials with high content of gold, silver and platinum group precious metals (greater than 600g / t), they can directly enter the precious metal extraction process to extract the precious metals. [0004] For low-grade mineral raw materials with only a few grams to tens of grams per ton of gold, silver and platinum group precious metals, the precious metals must be enriched. Its traditional proces...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B5/20B03C1/02B22F9/08
CPCY02P10/20
Inventor 李永军张强林谭世雄肖冬明王多冬甘振君王大窝刘俊
Owner JINCHUAN GROUP LIMITED
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