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Beneficiation method for recovering copper in copper smelting slag and beneficiation reagent

A technology of beneficiation agent and copper smelting slag, which is applied in flotation, solid separation, etc., can solve the problems of easy oxidation and decomposition, reduced vulcanization effect, poor floatability, etc., achieve high recovery rate of copper concentrate and improve vulcanization efficiency , the effect of improving stability

Active Publication Date: 2018-01-26
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the copper in the flotation recovery copper slag: the main composition of the copper slag is mainly oxidized ore, the composition is complex, and the floatability is poor; and the flotation method often has a good effect on the copper that exists in the form of sulfide. recovery effect, while copper in the form of oxide needs to be vulcanized before flotation, and its floatability is not as good as that of copper sulfide minerals; copper and iron embedded in copper slag have fine particle size, which makes it difficult to dissociate its monomers, affecting Its separation index; the theoretical research work on slag is not deep enough, especially the research on thermodynamics and kinetics is still very little, which brings difficulties to the comprehensive utilization of slag. So far, the comprehensive utilization of copper slag by flotation method rate is still low
Due to the process of mineral surface sulfidation, HS - and S 2- Unstable, prone to oxidation and decomposition, when the HS in the pulp - and S 2- When the concentration is low, the oxidation and decomposition will be faster, and the vulcanization effect will be greatly reduced

Method used

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  • Beneficiation method for recovering copper in copper smelting slag and beneficiation reagent
  • Beneficiation method for recovering copper in copper smelting slag and beneficiation reagent

Examples

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Embodiment 1

[0044] The grade of copper in the high-temperature smelting slag of a smelter is 1.25%, most of which co-exist in the form of copper sulfide ore and copper oxide ore, which exist in the glass body, and some are wrapped by gangue minerals. The beneficiation method of carrying out flotation recovery copper to this mineral is as follows:

[0045] (1) Grind 500g of high-temperature slag, the fineness of which is less than 0.074 mm, accounting for about 90%, inject it into the flotation machine and adjust the pulp concentration to about 35%;

[0046] (2) Add NaOH to adjust the pH value of the pulp to about 9. Add 500 g / t of sodium sulfite and sodium sulfide with a mass ratio of 2:3, 100 g / t of thiocarbamate, and 20 g / t of terpineol oil, and soak for 6 minutes to obtain roughing concentrate and roughing tailings respectively;

[0047] (3) Add 50g / t of thiocarbamate and 10g / t of terpineol oil to the roughing tailings, scrape and foam to obtain a scavenging tailings and a scavenging ...

Embodiment 2

[0052] The grade of copper in the smelting slag of a smelting furnace in a smelter is 0.83%. The beneficiation method for flotation of this mineral to recover copper is as follows:

[0053] (1) Grind 500g of high-temperature slag, the fineness of which is less than 0.074 mm, accounting for about 90%, inject it into the flotation machine and adjust the pulp concentration to about 35%;

[0054] (2) Add sodium carbonate to adjust the pH value of the pulp to around 9. Add 600g / t of sodium thiosulfate and sodium hydrosulfide with a mass ratio of 1:5, 150g / t of butyl xanthate, 15g / t of terpineol oil, and soak for 6 minutes to obtain roughing concentrate and roughing tailings respectively ;

[0055] (3) Add 75g / t of butyl xanthate and 7.5g / t of terpineol oil to the roughing tailings, scrape and foam to obtain a scavenging tailings and a scavenging concentrate, and a scavenging concentrate returns to the roughing step to form a closed loop ;

[0056] (4) Add 37.5g / t of butyl xantha...

Embodiment 3

[0060] The grade of copper in the shaft furnace smelting slag of a certain smelter is 2.05%. The beneficiation method for flotation of this mineral to recover copper is as follows:

[0061] (1) Grind 500g of high-temperature slag, the fineness of which is less than 0.074 mm, accounting for about 90%, inject it into the flotation machine and adjust the pulp concentration to about 35%;

[0062] (2) Add calcium hydroxide to adjust the pH value of the pulp to about 9. Add 770g / t of sodium lignosulfonate and sodium hydrosulfide with a mass ratio of 1:10, 120g / t of ethionate and butyl xanthate with a mass ratio of 1:1, 20g / t of pinitol oil, and scrape for 6 Minutes to obtain roughing concentrate and roughing tailings respectively;

[0063] (3) Add 60 g / t of thiocarbamate and butyl xanthate with a mass ratio of 1:1 to the roughing tailings, 10 g / t of terpineol oil, and scrape and foam to obtain a scavenging tailings and a scavenging concentrate. The sweeping concentrate returns to ...

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Abstract

The invention discloses a beneficiation method for recovering copper in copper smelting slag and a beneficiation reagent. The beneficiation reagent comprises a modified activator. The modified activator is formed in a manner that Na2S or NaHS serves as a matrix, and a modifier including one or more of alkane sulfonate, alkylbenzene sulfonate, lignosulfonate, fatty glyceride, stearic acid, peroxysulphate, sulfate, sulfite, thiosulfate or other sulfohydrate and sulfide. The invention further provides the beneficiation method for recovering the copper in the copper smelting slag through the beneficiation reagent. By means of the processes of ore grinding, pulp mixing, primary roughing, at least primary concentration and at least primary scavenging flotation, final copper concentrates and final tailings are obtained. A relatively high concentrate recovering rate can be reached, meanwhile, tailing running of the tailings is greatly lowered, the reagent is environmentally friendly, and the environmental influence can be reduced to the minimum extent.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a mineral processing method for recovering copper in copper smelting slag and a mineral processing agent. Background technique [0002] More than 97% of my country's copper output is produced by pyrometallurgy, and pyrometallurgy is dominant. The annual output of copper slag is as high as 15 million tons. At present, the stock of copper slag in my country has exceeded 50 million tons. A large amount of long-term storage of copper slag occupies a large amount of cultivated land and seriously pollutes the environment. Dust below 10 microns in copper slag can poison humans and animals. If it is piled up for a long time, harmful substances in the slag will seep into the soil and flow into rivers, causing water pollution and hindering the sustainable development of copper smelting enterprises. Recycling resources from waste not only enables sustainable use of limited reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/04B03D1/018
Inventor 陈运法王永良叶树峰叶礼平王安琪钱鹏
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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