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A kind of copper soot roasting strengthened leaching method

A technology for strengthening leaching and copper soot, applied in the field of non-ferrous metal metallurgy, can solve the problems of complex composition, difficulty in effectively leaching soot, and little research on soot treatment methods, and achieves low production cost, prevention of sintering phenomenon, and low labor intensity.

Inactive Publication Date: 2018-12-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods for soot treatment, most of them focus on the treatment of converter soot from copper smelting, and many studies focus on the overall recovery process of certain metals
However, few studies have been conducted on the treatment of soot produced by Osmanite furnaces or bottom-blown furnaces during copper smelting.
This kind of soot has a complex metal phase composition and contains a relatively high proportion of copper or zinc sulfides, so it is difficult to effectively extract copper and zinc in soot by using existing methods

Method used

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  • A kind of copper soot roasting strengthened leaching method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The main components of the soot produced during the smelting process of the copper concentrate Osmelt furnace melting pool of a domestic enterprise are (%): Pb28.69, Cu3.37, Zn15.54, As2.61, Bi3.72 and S14.72. The mass percentage of industrial grade sulfuric acid is not less than 98.0%.

[0027]Copper smelting soot is mixed with sulfuric acid solution to adjust the slurry, the liquid-solid ratio (the ratio of liquid volume L to solid weight kg) is controlled to be 3:1, the pH value of the mixed slurry is controlled to be 2.0, and the temperature of the mixed slurry is kept at 80°C. After reacting for 90 minutes at a stirring speed of 300r / min, liquid-solid separation was achieved by means of plate-and-frame filter press. The slag rate obtained in one-stage leaching process was 64.06%, and the contents of copper and zinc were 3.88% and 8.37%, the leaching rates of zinc and copper are 65.50% and 26.25% respectively; after drying, the sulfuric acid primary leaching residu...

Embodiment 2

[0029] The main components of the soot produced during the smelting process of a copper concentrate oxygen-enriched bottom blowing furnace molten pool in a domestic enterprise are (%): Pb24.73, Cu15.68, Zn4.13, As10.14, Bi2.63 and S10.71. The mass percentage of industrial grade sulfuric acid is not less than 98.0%.

[0030] Bottom-blowing furnace soot and sulfuric acid solution are mixed to adjust the slurry, the liquid-solid ratio (the ratio of liquid volume L to solid weight kg) is controlled to be 3:1, the pH value of the mixed slurry is controlled to 2.0, and the temperature of the mixed slurry is kept at 80°C. After reacting for 90 minutes at a stirring speed of 300r / min, liquid-solid separation was achieved by means of plate and frame filtration. The slag rate obtained in the primary sulfuric acid leaching process was 48.64%, and the contents of copper and zinc after the primary leaching slag were dried were 10.52%. and 2.85%, the leaching rates of copper and zinc were ...

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Abstract

The invention provides a method for roasting and intensified leaching of copper smelting dust. The method comprises the technical process that the copper smelting dust containing more metal sulfide is subjected to sulfuric acid primary leaching, oxidizing roasting and sulfuric acid secondary leaching, and therefore copper and zinc in the copper smelting dust can be effectively leached, and the comprehensive leaching rate of the metal of the copper and the zinc is more than 90%. The method has the advantages that the copper and the zinc in the copper smelting dust can be recovered by utilizing the technical process, the technological process is reasonable, the metal leaching rate is high, the reagent consumption is small, the operation is simple, the technical indexes are stable, the production cost is low, and remarkable economic benefits and environmental protection benefits can be achieved.

Description

technical field [0001] The invention relates to the field of nonferrous metal metallurgy, in particular to a hydrometallurgical method for intensified leaching of copper and zinc by roasting copper smelting soot. Background technique [0002] Currently, most of the world's copper metal is produced in the pyrometallurgical process, which produces a large amount of soot. Because soot contains not only copper, lead, zinc, bismuth, indium and other metals, but also toxic elements such as arsenic and cadmium, it is considered as an important secondary resource. In recent years, with the increase in copper production and the depletion of high-grade copper mines, the amount of soot produced by the copper metallurgical industry has continued to increase. In addition, environmental regulations have become more stringent. Therefore, soot treatment has become a key issue in the copper metallurgy industry. [0003] If the soot is directly returned to the smelting process without trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B1/02C22B19/20C22B15/00C22B13/00C22B30/06
CPCC22B1/02C22B7/007C22B7/02C22B13/045C22B15/0015C22B15/0071C22B19/22C22B30/06Y02P10/20
Inventor 刘伟锋傅新欣邓循博杨天足陈霖张杜超
Owner CENT SOUTH UNIV
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