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Method for comprehensively recovering gold, iron and sulphur resource from gold-containing sulfurous iron ore

A technology for recovery of pyrite and gold, applied in chemical instruments and methods, wet separation, flotation, etc., can solve the problems of difficult cyanide leaching of pyrite, difficulty in effective recovery, poor recovery of gold, etc. , to achieve the effects of high difficulty in ore dressing, high recovery rate, and guaranteed gold recovery rate

Inactive Publication Date: 2009-01-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This method is still difficult to effectively recover microscopic gold and pyrite-coated gold
[0011] Based on the above technical conditions, a large amount of gold lost in pyrite due to the difficulty of cyanide leaching has not been well recovered. If an advanced process and method can be adopted, gold, iron and sulfur can be recovered Efficient recycling will produce good economic and environmental benefits

Method used

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  • Method for comprehensively recovering gold, iron and sulphur resource from gold-containing sulfurous iron ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 An example of comprehensive utilization of pyrite resources with a gold content of 0.2-1 g / t and a sulfur mass percentage of 5%-10%.

[0054] 1. Production of gold-bearing high-grade sulfur concentrate:

[0055] The mass percentage of sulfur is 5% to 10%, the gold content is 0.2 to 1g / t, and the gold-bearing pyrite ore that is difficult to cyanide leaching, after grinding, the fineness reaches the weight percentage of the particle size of less than 0.074mm 50% to 95%, the monomer dissociation degree of gold mineral and pyrite combination and gangue mineral is greater than 95%. Add 500g / ton~1500g / ton sulfuric acid as activator, add xanthate 150g / ton~300g / ton as flotation collector, add foaming agent 50g / ton~100g / ton for gold sulfur Mixed flotation to obtain gold-sulfur mixed concentrate. The gold-sulfur mixed concentrate is beneficiated four to five times to obtain a gold-bearing high-grade sulfur concentrate with a total mass percentage of sulfide minerals g...

Embodiment 2

[0062] Embodiment 2: An embodiment of comprehensive utilization of gold-bearing pyrite resources with a mass percentage of sulfur of 10% to 30% and a gold content of 1 to 3 g / t.

[0063] 1. Production of gold-bearing high-grade sulfur concentrate:

[0064] The mass percentage of sulfur is 10% to 30%, the gold content is 1 to 3g / t, and the gold-bearing pyrite ore that is difficult to cyanide leaching, after the ore grinding, the fineness reaches the weight percentage of the particle size of less than 0.074mm 50% to 95%, the monomer dissociation degree of gold mineral and pyrite combination and gangue mineral is greater than 95%. Add 1500g / ton~3000g / ton sulfuric acid as activator, add xanthate 300g / ton~600g / ton as flotation collector, add foaming agent 30g / ton~50g / ton for gold sulfur Mixed flotation to obtain gold-sulfur mixed concentrate. The gold-sulfur mixed concentrate is beneficiated three to four times to obtain a gold-bearing high-grade sulfur concentrate with a total m...

Embodiment 3

[0071] Embodiment 3: An embodiment of comprehensive resource utilization of gold-bearing pyrite with a sulfur mass percentage of 30% to 38% and a gold content of 2 to 6 g / t.

[0072] 1. Production of gold-bearing high-grade sulfur concentrate:

[0073] The mass percentage of sulfur is 30%-38%, the gold content is 2-6g / t, and the gold-bearing pyrite ore that is difficult to cyanide leaching, after the ore grinding, the fineness reaches the weight percentage of the particle size of less than 0.074mm 50% to 95%, the monomer dissociation degree of gold mineral and pyrite combination and gangue mineral is greater than 95%. Add 2500g / ton-5000g / ton sulfuric acid as activator, add xanthate 500g / ton-800g / ton as flotation collector, add foaming agent 10g / ton-40g / ton for gold sulfur Mixed flotation to obtain gold-sulfur mixed concentrate. The gold-sulfur mixed concentrate is subjected to two to three times of beneficiation to obtain a gold-bearing high-grade sulfur concentrate with a t...

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Abstract

The invention discloses a method for comprehensively recovering gold sulfurous iron resources from gold-bearing sulfurous iron ore, comprising the following steps: middle and low-grade sulfurous iron ore containing micro-gold and enclosed gold is grinded, and gold-bearing high-grade sulfur ore concentrate is obtained after sulfate dipping, mixture, floatation and concentration for a plurality of times; the ore concentrate undergoes high-temperature overoxidation roasting in a fluid-bed furnace to prepare sulfuric acid after flue gas undergoes dust removal and purification, and cinder becomes high-iron low-sulfur gold-bearing slag; the cinder is added with a pellet adhesive and a chlorating agent for grinding, and a pellet is prepared; the pellet is dried and then undergoes high-temperature chlorination-evaporation roasting; the flue gas is roasted and gold concentrate is obtained after dust collection; and the roasted pellet ore is a high-quality iron-making raw material the iron content of which is more than 60 percent and the gold content of which is less than 0.2 grams per ton. The technology highly efficiently recovers a large amount of gold resources which is lost in the sulfurous iron ore due to difficult cyanidation and leaching caused by containing the micro-gold and the enclosed gold through mixture and floatation of gold and sulfur, concentrate for a plurality of times, high-temperature overoxidation roasting deep desulfurization and high-temperature chlorination roasting degolding, obtains high-quality iron pellet ore while obtaining the sulfuric acid, and highly efficiently utilizes iron resources.

Description

technical field [0001] The invention belongs to the technical field of beneficiation and metallurgy, and relates to a method for comprehensively recycling iron, gold and sulfur resources from gold-bearing pyrite which is difficult to cyanide leaching. Background technique [0002] Gold is often symbiotic with pyrite. When the gold intercalation particle size is extremely fine and is wrapped by pyrite, conventional cyanidation leaching has a very low leaching rate due to the fact that cyanide is difficult to directly contact the surface of gold particles, and the gold in it cannot be effectively recovered. Therefore, a considerable part of gold is lost in pyrite, resulting in the loss of a large amount of gold resources. Therefore, the recovery and utilization of pyrite-coated gold and micro-gold has always been a hot issue that has not been fundamentally resolved in the field of mineral processing and metallurgy. [0003] Pyrite is composed of iron and sulfur. Under the curr...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B1/02C22B1/14B03B7/00B03D1/00
Inventor 文书明刘丹熊堃
Owner KUNMING UNIV OF SCI & TECH
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