Mineral-separation gold extraction method adopting suspension roasting treatment of sulfur-containing and carbon-containing gold ore

A technology for suspension roasting and gold ore is applied in the field of mineral processing, which can solve the problem of low gold recovery rate, and achieve the effects of high heat utilization rate, saving dosage and reducing Fe ion content.

Inactive Publication Date: 2020-07-31
NORTHEASTERN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the traditional roasting method is used to treat gold ore, the recovery rate of gold is often not high. The gold content in the cyanidation tailings reaches 1-7g / t, which improves the recovery rate of gold and the significance of recovering the associated valuable metals to the comprehensive recovery of resources. major

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  • Mineral-separation gold extraction method adopting suspension roasting treatment of sulfur-containing and carbon-containing gold ore
  • Mineral-separation gold extraction method adopting suspension roasting treatment of sulfur-containing and carbon-containing gold ore

Examples

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Effect test

Embodiment 1

[0026] A carbon-bearing gold rough concentrate in Sichuan, with a gold grade of 30g / t and a carbon content of 7.34%.

[0027] A method for beneficiating and extracting gold by suspending and roasting sulfur-containing and carbon-containing gold ores, the specific operation steps are as follows:

[0028] 1) Feed carbon-containing gold ore with an ore particle size below 0.074mm into the reaction chamber of the suspension roasting system for crystal breaking roasting, wherein the roasting temperature is 400°C, the roasting time is 10 minutes, and sufficient air is introduced during roasting;

[0029] 2) Add the crystal-broken roasted product obtained in the previous step into a stirring tank for slurry mixing, and then perform grinding with a ceramic medium stirring mill, the grinding concentration is 50%, and the grinding fineness-0.045mm particle size content is 90%;

[0030] 3) For the product after grinding, sodium cyanide is used for cyanidation leaching, the amount of sodi...

Embodiment 2

[0034] A sulfur-bearing gold tailing in Jiangxi, with a gold grade of 3.89g / t and a sulfur content of 6.14%.

[0035] A method for beneficiating and extracting gold by suspending and roasting sulfur-containing and carbon-containing gold ores, the specific operation steps are as follows:

[0036] 1) Feed the sulfur-containing gold tailings into the reaction chamber of the suspension roasting system for crystal breaking roasting, wherein the roasting temperature is 500°C, the roasting time is 10 hours, and sufficient air is introduced during roasting;

[0037] 2) Add the crystal-broken roasted product obtained in the previous step into a stirring tank for slurry mixing, and then perform grinding with a ceramic medium stirring mill, the grinding concentration is 50%, and the grinding fineness-0.038mm particle size content is 98%;

[0038] 3) For the product after grinding, use sodium cyanide for cyanidation leaching, the amount of sodium cyanide is 10kg / t, the leaching concentrat...

Embodiment 3

[0042] A carbon-bearing gold mine in Shaanxi, with a gold grade of 4.5g / t and a carbon content of 6.5%.

[0043] A method for beneficiating and extracting gold by suspending and roasting sulfur-containing and carbon-containing gold ores, the specific operation steps are as follows:

[0044] 1) Feed the carbon-containing gold ore whose ore particle size is crushed to below 1 mm into the reaction chamber of the suspension roasting system, and carry out crystal breaking roasting, wherein the roasting temperature is 900 ° C, the roasting time is 20 minutes, and sufficient air is introduced during roasting;

[0045] 2) Add the crystal-broken roasted product obtained in the previous step into a stirring tank for slurry mixing, and then perform grinding with a ceramic medium stirring mill, the grinding concentration is 50%, and the grinding fineness-0.045mm particle size content is 93%;

[0046] 3) For the product after grinding, sodium cyanide is used for cyanidation leaching, the a...

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Abstract

The invention provides a mineral-separation gold extraction method adopting suspension roasting treatment of a sulfur-containing and carbon-containing gold ore and belongs to the technical field of mineral processing. Aiming at the problems about the recovery rate and the like of refractory gold ores such as carbon-containing substances (such as humus acid) and sulfides (such as pyrite), the invention discloses a pretreatment technology and a mineral-separation gold extraction method for the sulfur-containing and carbon-containing gold ore. By using the method provided by the invention for operation, the leaching efficiency of a gold grade in final cyanide leaching residues is higher; in the leaching residues, the Au content is generally reduced by 0.5 g/t to 3 g/t than that of a traditional roasting process, so the resource utilization rate can be increased; meanwhile, the tail gas control in operation of the method provided by the invention can satisfy the ultralow emission requirement; and compared with a common traditional method, the method provided by the invention has low air pollutant emission and is more beneficial for protecting the environment.

Description

technical field [0001] The invention belongs to the technical field of mineral processing. Specifically, the invention relates to a method for dressing and extracting gold by suspending and roasting sulfur-containing and carbon-containing gold ores. Background technique [0002] my country is a big gold producing country. Since 2009, my country's gold production has ranked first in the world for many years. my country's gold smelters produce a large amount of cyanide tailings every year, and the newly added gold tailings exceed 25 million tons every year. According to the different production processes of gold enterprises, it can be divided into roasting cyanidation method, biological oxidation method, full mud cyanidation method, gold concentrate cyanidation method and other processing methods. Among them, the roasting cyanidation method is the main application. According to the statistics of processing capacity, the gold production by roasting cyanidation method accounts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/04C22B11/08C22B3/46
CPCC22B1/02C22B3/04C22B3/46C22B11/04C22B11/08Y02P10/20
Inventor 韩跃新李艳军李文博
Owner NORTHEASTERN UNIV
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