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
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  • 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, t

Method used

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Examples

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Example Embodiment

[0032] Example 1

[0033] The nickel sulfide concentrate with 8% nickel, 4% copper, 2g / t precious metal content and 100t mass is smelted in an electric furnace at a temperature of 1200-1300°C, and then subjected to converter blowing 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, a magnetic separator with a field strength of 1800Oe was used for ore dressing to obtain a 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 1-15 mm. The alloy particles after water quenching are loaded into the synthesis reactor, and carbon monoxide gas with a purity of 80% is continuously introduced from the lower part of the synthesis reactor. Nickel reacts with ca...

Example Embodiment

[0034] Example 2

[0035] The nickel sulfide concentrate with 12% nickel, 5% copper, 5g / t precious metal content and 100t mass is smelted in an electric furnace at a temperature of 1200-1300 ℃, and then subjected to converter blowing 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, and after crushing and grinding, the ore was processed by a magnetic separator with a field strength of 2000Oe to obtain 1.4t nickel-copper alloy, which contained 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 1-15 mm. The alloy particles after water quenching are loaded into the synthesis reactor, and carbon monoxide gas with a purity of 86% is continuously introduced from the lower part of the synthesis reactor, and the press...

Example Embodiment

[0036] Example 3

[0037]The nickel sulfide concentrate with 16% nickel, 6% copper, 10g / t precious metal content and 100t mass is smelted in an electric furnace at a temperature of 1200-1300°C, and then subjected to converter blowing 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, a magnetic separator with a field strength of 2400Oe was used for ore dressing 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 1-15 mm. The alloy particles after water quenching are loaded into the synthesis reactor, and carbon monoxide gas with a purity of 90% is continuously introduced from the lower part of the synthesis reactor. Nickel reacts with ca...

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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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