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New technology for flashing speed activation flotation of Carin type gold mine

A new process, Carlin-type technology, applied in flotation, solid separation, grain processing, etc., can solve the problems of no substantial progress and poor flotation effect, and reduce the flotation operation and the total recovery rate of gold selection. The effect of improving and promoting the differentiation of medium and ore

Inactive Publication Date: 2004-11-10
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When according to the conventional dosing place, that is, the flotation agent is added after the grinding and classification, and in the stirring tank before the flotation, the flotation effect is poor, and the gold recovery rate only fluctuates between 70% and 74%. made substantial progress

Method used

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  • New technology for flashing speed activation flotation of Carin type gold mine
  • New technology for flashing speed activation flotation of Carin type gold mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Conventional flotation process test, that is, sodium carbonate is not added to the mill, but only added to the flotation machine. For details of its process conditions, see figure 1 .

[0011] Put 500g of Carlin-type gold ore containing 4.8g / t of gold into the laboratory-type grinding machine, the size of the grinding machine is Φ200×240mm, the grinding concentration is 60%, the grinding time is 8 minutes, and the grinding fineness reaches- 43μm (-320 mesh) accounts for 90%. A laboratory-type flotation machine with a specification of 1.5 liters is used to stir the finely ground pulp while adding water glass 300g / t and sodium carbonate 5000+1000+1000+1000 in sequence. +1000g / t, copper sulfate 200+100+100+100+100g / t, pentaxanthate 300+100+100+100+100g / t and pine oil 40+20+20+20+20g / t for rough selection 2 times and 3 times of sweeping, the cumulative time is 31 minutes, 2 times of selection in 0.75 liter and 0.5 liter flotation machines, the time is 10 minutes, and 35.2...

Embodiment 2

[0013] For flash activation flotation new process test, 1000g / t of sodium carbonate is added to the mill in advance. For details of its process conditions, see figure 2 .

[0014] Put 500g of gold-bearing 4.8g / t Carlin-type gold ore and 0.5g of sodium carbonate into the laboratory-type grinding machine, the size of the grinding machine is Φ200×240mm, the grinding concentration is 60%, the grinding time is 8 minutes, and the grinding The ore fineness reaches -43μm, accounting for 90%. The ground pulp is stirred by a laboratory-type flotation machine with a specification of 1.5 liters, and at the same time, 300g / t of water glass and 4000+1000+1000g / t of sodium carbonate are added in sequence. , copper sulfate 200+100+100g / t, pentaxanthate 300+100+100g / t and pine oil 40+20+20g / t roughing twice and sweeping once, the cumulative time is 21 minutes, at 0.75 liter and a 0.5-liter flotation machine for 2 times for 10 minutes to obtain 37.6 g of gold concentrate with a gold content ...

Embodiment 3

[0016] For flash activation flotation new process test, 1500g / t of sodium carbonate was added to the mill in advance. For details of its process conditions, see figure 2 .

[0017] Put 500g of ore containing 4.9g / t of gold and 0.75g of sodium carbonate into the laboratory-type grinding machine, the size of the grinding machine is Φ200×240mm, the grinding concentration is 60%, the grinding time is 8 minutes, and the grinding fineness reaches- 43μm accounts for 90%. The ground pulp is stirred by a laboratory-type flotation machine with a specification of 1.5 liters. At the same time, 300g / t of water glass, 3500+1000+1000g / t of sodium carbonate, and 200+ of copper sulfate are added in sequence. 100+100g / t, pentaxanthate 300+100+100g / t and pine oil 40+20+20g / t roughing and sweeping for 21 minutes, 2 times of refining in 0.75L and 0.5L flotation machines , the time is 10 minutes, 39.4g of gold concentrate containing 50.6g / t of gold is obtained, and the recovery rate is 81.37%. ...

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Abstract

The invention is a new technique of flash activation select flotation of Carlin-type gold ore, during the grinding course of Carlin-type gold ore at a 320-eye grinding fineness accounting for 85-90%, preadding sodium carbonate at 1000-2000g / t. as regulating agent, to make golden arsenical pyrite and pyrite able to firstly absorb activating agent sodium carbonate at the first time of dissociating a fresh surface, accelerating floatation of the gold ore and promoting differentiation of medium ore to make total recovery of gold selection reach 81% and the recovery show a net increase of 7-11 percents; at the same time, omitting complex technique of eliminating mud, reducing the loss caused by fine mud containing gold, reducing number of times of finely selection and scan-selection, simplifying technical flow and largely heightening economic benefits.

Description

technical field [0001] The invention relates to the technical field of mining and metallurgy, in particular to a new flash activation flotation process for Carlin type gold ore. Background technique [0002] Carlin-type gold deposits are characterized by the fact that gold is embedded in gold-bearing carrier minerals in the form of -2μm ultrafine particles, and the gold carrier minerals are embedded in surrounding rocks in the form of -43μm ultrafine particles. Generally speaking, the floatability of carrier minerals is moderate to difficult. The ore also contains a large amount of clay minerals and argillaceous minerals. Therefore, this type of gold ore has large reserves, low grade, and difficult dressing and smelting. China is one of the concentrated production areas of Carlin-type gold mines in the world, and its reserves account for about 40% of the world. The main concentrated production areas are Guizhou, Sichuan, Jilin and Shanxi. The gold deposits in the Sandu ar...

Claims

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Application Information

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IPC IPC(8): B02C17/00B03D1/00
Inventor 黄云平赵祖乔富文彬周洪源唐士科许锦康陈家栋
Owner KUNMING METALLURGY INST
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