Method for recovering valuable elements in gold-silver-iron associated ore tailings

A technology of valuable elements and recycling methods, applied in the direction of improving process efficiency, etc., can solve the problems of low added value of products, low comprehensive utilization rate of valuable elements, backward technology, etc., to save construction investment and equipment costs, and benefit Safe and environmentally friendly production and the effect of reducing the workload of cyanide leaching

Pending Publication Date: 2021-05-14
YUNNAN GOLD MINING GRP
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main technologies and existing problems of the comprehensive utilization of tailings resources in my country are: (1) Tailings re-selection, tailings re-selection generally has small scale, backward technology, low recovery rate, high energy consumption, high cost, and valuable The low comprehensive utilization rate of elements; (2) Tailings production of building materials, lack of original innovation, low product added value, small sales radius, does not show the comprehensive advantages of production cost, transportation cost

Method used

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  • Method for recovering valuable elements in gold-silver-iron associated ore tailings
  • Method for recovering valuable elements in gold-silver-iron associated ore tailings
  • Method for recovering valuable elements in gold-silver-iron associated ore tailings

Examples

Experimental program
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Example Embodiment

[0042]Example 1:

[0043]Test tailings (ore pulp) taken from a gold and silver total in Yunnan (copper ore) ore, tail mine chemistry multi-element analysis shows that iron is 22.41%, gold position is 0.30g / t, silver The product is 6.01 g / t, the magnet content is changed between 2 to 3% in the tailings; the results of the tailings process mineral administration show that the gold mainly disperse in the yellow iron ore, magnetite, brown Iron ore, Lingmine and pulse minerals; silver mainly disperse the micro-pack of silver and miners in the pyrite, magnetite, brown mine, rhodes and pulse minerals; iron minerals in tailings are mainly Lhring Mine, second brown mine, as well as a small amount of magnetite and yellow iron mine; iron mineral is the main carrier mineral of gold and silver. Therefore, the golden silver mineral will be the main selection recycling object.

[0044]After the tail slurry is slurry to a concentration of 25-30%, enter the magnetic selection operation, using a wet pe...

Example Embodiment

[0053]Example 2:

[0054]Test tailings (ore pulp) taken from a gold and silver total in Yunnan (lead-zinc ore), the tail mine is selected, and the chemical multi-element analysis of tailings shows that the iron is 18.19% (magnetic iron bit), the gold position is 0.26 G / t, silver is 6.32g / t, the magnet content is changed between 2 to 3% in tailings; the results of tailings process mineralogy showed that gold mainly dispersed in magnetite in magnetite mainly with natural gold. Brown mine, Lingmite, hematite and pulse stone mineral; silver mainly subjected to micro-packing of silver and miners in magnetite, brown mineral, Lingmite, hematite and pulse minerals; tailings Minerals are mainly alirite, second brown ore, hematite, and a small amount of magnetite and yellow iron mine; iron mineral is the main carrier mineral of gold and silver. Therefore, the golden silver mineral will be the main selection recycling object.

[0055]After the tail slurry is slurry to a concentration of 25-30%, ...

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Abstract

The invention relates to a method for recovering valuable elements in gold-silver-iron associated ore tailings. The process technical route comprises the following steps that S1, ferromagnetic magnetite concentrate and gold-silver-loaded intergrowth with lower magnet content are recovered from the tailings by adopting medium magnetic separation; S2, the iron rough concentrate is finely ground until the content of-0.038 mm accounts for 90% or above; S3, a proper amount of lime milk is added for pulp mixing, the pulp concentration is controlled to be 30%-35%, the pulp pH value is 10-12, the cyanide concentration is 0.03%-0.07%, compressed air is input, the dissolved oxygen content in the pulp is controlled to be 15-20 mg/l, and the cyanidation leaching time is 28-30 hours; and S4, after a dispersing agent is added into the cyanidation leaching residues, strong magnetic iron minerals are recycled through low intensity magnetic separation, and magnetite concentrate is obtained. The low-intensity magnetic separation tailings are subjected to high-field-intensity and high-gradient high-intensity magnetic separation to recover low-intensity magnetic iron minerals, and high-intensity magnetic products are obtained; and the dispersing agent is prepared from water glass and sodium hexametaphosphate in a weight ratio of 1.6-3: 1. Aiming at the characteristics of tailings, the iron recovery rate is improved on the premise of ensuring the gold-silver recovery rate and the magnetite concentrate grade.

Description

technical field [0001] The invention relates to a method for recovering valuable elements in gold-silver-iron co-associated ore tailings, which belongs to the field of ore dressing and hydrometallurgy. Background technique [0002] Mineral dressing is the use of physical or chemical methods to separate useful minerals from useless or harmful minerals in mineral raw materials. The product enriched in useful components is called concentrate, and the product enriched in useless components is called tailings. The concentrate provided by ore dressing is mainly used for smelting Industry extracts raw materials for metals. Magnetic separation is carried out in the magnetic field of the magnetic separation equipment. After the ore to be selected enters the separation space of the magnetic separation equipment, it is affected by magnetic force and mechanical force (including gravity, centrifugal force, water flow force, etc.). Ore particles with different magnetic properties are af...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/08C22B1/00
CPCC22B7/006C22B11/042C22B11/08C22B1/005Y02P10/20
Inventor 高起方姜亚雄谢恩龙段胜红周东云周光浪代生权胡常光
Owner YUNNAN GOLD MINING GRP
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