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Process for recovering valuable components from fine-grained viscous mud and slag by using centrifugal machine

A technology that uses centrifuges and fine particles, applied in the field of mineral smelting, can solve problems such as low recovery rate, inability to obtain economic benefits, lack of separation methods, etc.

Inactive Publication Date: 2019-08-23
赣州金环磁选科技装备股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of mud and slag is rich in valuable components such as gold, silver and lead, which cannot be effectively recovered by continuing to use the leaching process
If the flotation process is used for treatment, the slurry formed by mud and slag pulping is very viscous and fine-grained, which will seriously interfere with the flotation process and cause serious side effects, and the consumption of reagents is very large, which cannot be effectively recovered; Gravity separation process such as shaker treatment, because the particle size of the valuable components in the mud and slag is fine, the recovery rate is very low, economic benefits cannot be obtained, and it is difficult to popularize and apply
So far, there is still a lack of effective separation methods that can separate and recover valuable components from acid leaching mud of roasted slag and leaching slag of bacterial oxidative cyanide of gold concentrate

Method used

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  • Process for recovering valuable components from fine-grained viscous mud and slag by using centrifugal machine

Examples

Experimental program
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Effect test

Embodiment 1

[0017] A certain zinc smelting slag, particle size -325 mesh is greater than 90%, water content is higher than 25%, it is muddy, high viscosity, poor dispersibility; pH ​​= 6, it is slightly acidic, and the main valuable components are silver and lead substances. Under the microscope, lead mainly exists in the form of lead sulfate, and silver and lead are symbiotic. If the traditional gravity separation method is used, the valuable components have a fine particle size and low density, and the recovery rate is very low, so there is no economic benefit; if the flotation process is used, it is also because of the high viscosity and fine particle size of the material. On the other hand, the production cost is high, and there are environmental pollution control problems, so it is difficult to apply.

[0018] Adopt the patent of the invention figure 1 craft. The raw material is gold smelting slag, containing 15g / t silver and 5% lead. Main operating conditions: the solid concentra...

Embodiment 2

[0021] A gold smelting slag has a particle size of -400 mesh > 90%, water content > 20%, is muddy, has high viscosity, and poor dispersibility; PH=7.6 is alkaline, and the main valuable components are gold, silver and sulfur, gold and silver The carriers in the process are all sulfur-containing substances; therefore, the recovery of sulfur-containing substances means that gold and silver are recovered. Using traditional gravity separation methods such as shaker treatment, due to the fine particle size and high viscosity of the sulfur-containing slag, it cannot be effectively sorted and recovered; the flotation process is also used because of the high viscosity and fine particle size of the slag, and the flotation reagents cannot be effective. Sulfur-containing substances are collected, and the production cost is high, and there are environmental pollution control problems, so it is difficult to apply.

[0022] Adopt the patent of the invention figure 1 craft. The raw materia...

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Abstract

The invention discloses a process for effectively separating and recovering valuable components from acid leaching mud of zinc concentrate roasting slag of wet-process electrozinc smelting plant, leaching slag of bacterial oxidation cyanidation of gold concentrate of wet-process electrozinc smelting plant and the like. According to the process, after the mud or slags is injected into water to a certain concentration, the mud or slag is preliminarily loosened through a double-paddle groove type stirrer, then a stirring barrel is used for fully loosening, classification is carried out by using ahydrocyclone, classification is carried out by using a linear vibrating screen for fine-grained overflow, and particle sizes of overflow and undersize are controlled according to material properties;the undersize enters a slurry storage type stirring barrel to make slurry, is adjusted to a proper concentration, is separated by using a centrifugal machine, so that separation and recovery of the valuable components from mud or slag are achieved; and the return sand of the stirrer, the underflow of the hydrocyclone and the oversize of the linear vibrating screen are all coarse materials withoutcompletely loose, the coarse materials are combined and then fed into a water injection point again, and the coarse materials enter the process of the patent for cyclic treatment. The process can beused as a separate process to treat sludge or slag, and can also be used as a primary separation process to provide qualified feedstock for a subsequent fine separation process.

Description

technical field [0001] The invention relates to the field of mineral smelting, in particular to a process for recovering valuable components from fine-grained viscous mud and slag by using a centrifuge. Background technique [0002] Many hydroelectric zinc smelters and hydrometallurgical smelters in China produce and stockpile a large amount of roasting slag acid leaching mud and gold concentrate bacterial oxidation cyanide leaching slag. Such mud and slag are rich in valuable components such as gold, silver and lead, which cannot be effectively recovered by continuing to use the leaching process. If the flotation process is used, the slurry formed by mud and slag pulping has a high viscosity and a fine particle size, which will seriously interfere with the flotation process and cause serious side effects, and the reagent consumption is very large, which cannot be effectively recovered; if the traditional slurry is used Gravity separation process such as shaker treatment, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00C22B13/00C01B17/02B03B9/00
CPCC22B7/005C22B11/00C22B13/00C01B17/02B03B9/00Y02P10/20
Inventor 彭征陈禄政黄会春熊涛廖国平饶宇欢范志坚
Owner 赣州金环磁选科技装备股份有限公司