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Modified desulfurization process for sulfur-containing noble metal material

A desulfurization process and precious metal technology, applied in the direction of sulfur compounds, non-metallic elements, inorganic chemistry, etc., can solve the problems of slow leaching speed, difficult industrial production, poor economic benefits, etc., and achieve the effect of reducing sulfur content

Inactive Publication Date: 2019-02-26
JINCHUAN GROUP LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These traditional desulfurization technologies have many disadvantages: for example, the incineration desulfurization process has problems such as long process, cumbersome operation, low yield of precious metals, incomplete desulfurization, and serious environmental pollution; Low; the quality of sulfur produced by the ammonium sulfide method is poor, the environment is seriously polluted, and it is difficult to industrialize production; the operation safety of the organic solvent method is poor, the environment is polluted seriously, and the sulfur recovery rate is low; the yield of precious metals by the alkaline leaching desulfurization method is low, and the economic benefits are not good
Therefore, an effective desulfurization process for sulfur-containing precious metal materials has not yet been formed.

Method used

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  • Modified desulfurization process for sulfur-containing noble metal material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 5kg of sulfur-containing noble metal material, the analysis shows that the sulfur content is 78.63%, and the noble metal (Au+Pt+Pd) content is 120g / t. Take 20 kg of water, put it into the reaction kettle together with sulfur-containing precious metal materials, heat to 80°C, boil and wash for 30 minutes, filter to obtain pretreatment slag and pretreatment liquid, and recover nickel and copper from the pretreatment liquid; Slurry with water at a ratio of 1:4, and add sulfur-modified enzyme SCL at a weight ratio of 1:3 for pretreatment slag and sulfur-modified enzyme SCL to modify under pressure. The reaction temperature was 125°C, the pressure was 0.25MPa and the reaction was stirred for 2 hours, and the material was cooled and discharged to obtain a sulfur product with a purity of 98.79% and a desulfurization rate of 91.30%. The Au content is 0.0002g / L, the Pt content is not detected, and the Pd content is 0.0004g / L, which is treated as intermediate water.

Embodiment 2

[0021] Take 5kg of sulfur-containing noble metal material, the analysis shows that the sulfur content is 88.82%, and the noble metal (Au+Pt+Pd) content is 113.4g / t. Take 25 kg of water, put it into the reaction kettle together with sulfur-containing precious metal materials, heat to 80°C, boil and wash for 30 minutes, filter to obtain pretreatment slag and pretreatment liquid, and recover nickel and copper from the pretreatment liquid; Slurry with water at a ratio of 1:5, and add sulfur-modified enzyme SCL at a weight ratio of 1:4 for pretreatment slag and sulfur-modified enzyme SCL to modify under pressure. The reaction temperature is 140°C, the pressure is 0.38MPa, stirring and reacting for 3 hours, cooling and discharging, and the purity of the sulfur product is 98.18%, and the desulfurization rate is 92.05%. The Au content is 0.0002g / L, the Pt content is not detected, and the Pd content is 0.0003g / L, which is treated as intermediate water.

[0022] The process of the inve...

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Abstract

The invention discloses a modified desulfurization process for a sulfur-containing noble metal material and belongs to the technical field of metallurgical processes. In order to desulfurize efficiently, the process comprises the following steps: first, heating the sulfur-containing noble metal material under a pressurizing condition, wherein the element sulfur is melted; carrying out ring openingfor recombination under the action of a sulfur modified enzyme SCL to form stable short chain sulfur which settles to the bottom of a kettle; and finally, cooling the sulfur and discharging the sulfur to obtain a sulfur product and enriching the noble metals. By adopting the modified desulfurization method, the sulfur content in the sulfur-containing noble metal material is reduced greatly, and the desulfurization rate can reach over 91%. The noble metals in the sulfur-containing noble metal material are enriched effectively, and the enriching multiple can reach 6-7 times. The process does not adopt an organic solvent and is free of emission of waste residues and waste liquor, is environmentally friendly, and meets the demand on clean production.

Description

technical field [0001] The invention belongs to the technical field of metallurgical technology, in particular to a technology for removing sulfur from sulfur-containing noble metal materials, in particular to a modified desulfurization technology for sulfur-containing noble metal materials. Background technique [0002] The desulfurization process of sulfur-containing precious metal materials mainly includes incineration method, sodium sulfide, ammonium sulfide leaching method, kerosene, CS2, benzene, carbon tetrachloride and other organic solvent methods, alkali leaching desulfurization, etc. These traditional desulfurization technologies have many disadvantages: for example, the incineration desulfurization process has problems such as long process, cumbersome operation, low yield of precious metals, incomplete desulfurization, and serious environmental pollution; Low; the quality of sulfur produced by the ammonium sulfide method is poor, the environment is seriously poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/11C22B11/00C22B15/00C22B23/00C01B17/027
CPCC01B17/027C22B1/11C22B11/00C22B15/0002C22B23/00
Inventor 张燕周文茜刘世和宋宏儒曹杰义杜彦君
Owner JINCHUAN GROUP LIMITED