A new environment-friendly gold ore beneficiation process under simulated natural conditions

A technology based on natural conditions and gold ore, which is applied in the fields of new environmental protection gold ore beneficiation process, environmental protection measures and tailings resource utilization technology, which can solve the problems that restrict the practical application of pollution control technology, tailings dust pollution, large equipment investment, etc. problems, to achieve the effect of reducing treatment costs, reducing environmental hazards, and reducing energy consumption

Inactive Publication Date: 2011-12-14
李溪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, there are serious environmental problems such as sulfur pollution, heavy metal pollution, and tailings dust pollution in the gold refining process. Generally speaking, the cyanide gold extraction process is

Method used

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  • A new environment-friendly gold ore beneficiation process under simulated natural conditions
  • A new environment-friendly gold ore beneficiation process under simulated natural conditions
  • A new environment-friendly gold ore beneficiation process under simulated natural conditions

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Embodiment 1

[0026] Gold sample 1, produced in Gansu, is a primary quartz mine with a gold content of 5.5 g / t. The main components are 94% quartz, 5% pyrite, and 1% silicate. The average particle size of gold particles is 11.2 microns, and 66% is Quartz-coated, 34% pyrite-coated. The traditional process adopts amalgamation gravity gravity pretreatment, sodium cyanide solution leaching, the gold recovery rate is 94%, the grade of fine gold is 100-110 g / ton, and the grade of tailings is 0.3 g / ton. After adopting the process disclosed in this patent, the recovery rate of gold is 99%, the grade of fine gold ore is 500-1000 g / ton, the grade of tailings is lower than 0.1 g / ton, and the amount of sodium cyanide, the main pollutant per gram of gold produced, is reduced 82%, the cost is reduced by 41%, and the power consumption is reduced by 53%.

Embodiment 2

[0028] Gold ore sample 2, produced in Shandong, belongs to pyrite gold-bearing quartz vein ore, with a gold content of 8 g / t, a sulfide (pyrite-based) content of 13%, a quartz content of 83%, and an average particle size of gold particles of 10.1 Micron, more than 90% of which are closely symbiotic with pyrite, traditionally grind to more than 60% and pass through a 200-mesh sieve (aperture 74 microns), and then use air flotation, the gold recovery rate is 96%, and the gold concentrate grade is 90 g / ton. Cyanide leaching adopts roasting acid production process in advance, and 4kg of industrial sulfuric acid can be produced for every 1g of gold produced. Using the process disclosed in this patent, without using any flotation agent, the gold recovery rate is 97%, the gold concentrate grade reaches 600-700 g / t, and 7 kg of industrial sulfuric acid can be produced for every 1 gram of gold produced, and every gram of gold produced Costs are reduced by 27% and power consumption is r...

Embodiment 3

[0030] Gold ore sample 3, produced in Henan, is a refractory ore with high arsenic content, the gold content is 4g / ton, the recovery rate of traditional cyanidation extraction is 50-60%, the tailings grade is 1.7g / ton, and the gold concentrate grade is 50-60 g / t, the arsenic content of gold concentrate exceeds the national precious metal smelting standard. After using the process disclosed in this patent, the gold recovery rate is 92%, the tailings grade is 0.3 g / ton, the gold concentrate grade is 350-400 g / ton, and the arsenic in the flue gas is recovered in the form of white arsenic, which is comprehensively recovered The efficiency reaches 99.9%, and the consumption of cyanide per ton of raw ore is reduced by 89%.

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Abstract

The invention discloses a novel environment-friendly gold ore beneficiation process under simulated natural conditions, and relates to the fields of beneficiation and environmental protection. It is characterized in that the particle size distribution of gold particles in the gold ore and the components and forms of the associated ore are accurately measured, and then the gold ore is crushed, finely ground, step-by-step screened, blown, magnetized water treatment, heating, cooling , ultrasound, microwave, gravity separation and other technological procedures, simulated the geological weathering process that would take millions of years to complete under natural conditions, and quickly realized the process of gold ore transformation into alluvial gold and gold concentration, so that the grade of gold concentrate produced It can be increased from less than 100 grams/ton to 300-1000 grams/ton. This treatment process is suitable for refractory original ecological gold mines, and can effectively recycle various tailings produced in the process. Compared with traditional processes, it can greatly reduce production costs and reduce environmental pollution. It is a low-cost And environment-friendly gold ore beneficiation process.

Description

technical field [0001] The invention is a novel environment-friendly gold ore beneficiation process under simulated natural conditions, and relates to the fields of beneficiation and environmental protection. [0002] The invention also relates to the environmental protection measures of the above-mentioned process and tailings resource utilization technology. Background technique [0003] With the rapid development of high-tech fields such as electronics and aerospace, the demand for gold in countries around the world is increasing day by day, and the gold market has been in a long-term obvious situation of short supply. At the same time, most currencies in the world use gold reserves as a credit guarantee, and our country is no exception. The production of gold is more related to the financial security of our country and the world. How to increase gold production, reduce the cost of gold production and environmental pollution in the production process is a difficult probl...

Claims

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Application Information

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IPC IPC(8): B03B7/00
Inventor 李溪康诗飞王燕刚朱培怡黄苏君蒋圣
Owner 李溪
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