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Method for recovering zinc, silver and copper from zinc leaching residue

A zinc leaching slag, zinc-silver-copper technology, applied in the direction of process efficiency improvement, flotation, solid separation, etc., to achieve the effect of good economic benefits

Active Publication Date: 2011-09-14
YUNNAN LUOPING ZINC & ELECTRICITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods for recovering only silver in zinc leaching slag mainly include thiourea method, chloride salt method, sulfate roasting and leaching method, flotation method, immersion smelting method, etc. However, the comprehensive recovery method of recovering silver and copper in zinc leaching slag Not yet reported

Method used

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  • Method for recovering zinc, silver and copper from zinc leaching residue
  • Method for recovering zinc, silver and copper from zinc leaching residue
  • Method for recovering zinc, silver and copper from zinc leaching residue

Examples

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Effect test

Embodiment 1

[0027]Example 1: 600g of zinc leaching slag containing 14.05wt% of zinc, 0.0154wt% of silver, 1.18wt% of copper and 22.58wt% of moisture after boiling and roasting and hydro-smelting zinc leaching with zinc concentrate is used as raw material, and water is adjusted The pulp concentration is 55wt%, adjust the pH to 4 with 98wt% sulfuric acid, and stir for 8 minutes; add 2g of sodium sulfite to prepare a 10wt% sodium sulfite aqueous solution, stir for 3 minutes, then add 0.4g of butylamine black medicine to prepare a 10wt% butyl Amine black chemical solution, stirred for 3 minutes, directly added No. 2 oil 0.025g, stirred for 2 minutes, opened the inflation valve, scraped and soaked for 10 minutes, and obtained No. 1 silver concentrate and No. 1 tailings. Adjust the No. 1 tailings to pH=4 with 98wt% sulfuric acid to carry out silver sweeping I, add 1.3g sodium sulfite, be mixed with 10wt% sodium sulfite aqueous solution, stir for 3min, add 0.25g of butylamine black medicine, be m...

Embodiment 2

[0039] Example 2: Zinc containing 11.79wt% of zinc, 0.0121wt% of silver, 0.93wt% of copper, and 28.00wt% of moisture from the zinc concentrate of Yunnan Luoping Zinc Electric Co., Ltd. leaching residue 550g, adjust the slurry concentration to 52wt% with water, adjust the pH to 4 with 98wt% sulfuric acid, stir for 8 minutes, add 2.5g of sodium sulfite to prepare a 10wt% sodium sulfite aqueous solution, stir for 3 minutes, then add 0.4g of butylamine black medicine, Prepare a 10wt% aqueous solution of butylamine black solution, stir for 3 minutes, directly add 0.03 g of No. 2 oil, stir for 2 minutes, open the inflation valve, and scrape and soak for 10 minutes to obtain No. 1 silver concentrate and No. 1 tailings. Then No. 1 tailings is adjusted to pH=4.5 with 98wt% sulfuric acid to carry out silver sweeping I, add 1.5g sodium sulfite, be mixed with 10wt% sodium sulfite aqueous solution, stir 5min, add butylamine black medicine 0.3g, be mixed with 10wt% Butylamine black chemical...

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Abstract

The invention relates to a method for recovering zinc, silver and copper from zinc leaching residue. In the method, before being processed in a rotary kiln, the zinc leaching residue which is from the fluidized roasting and wet-method zinc refining leaching of zinc ore concentrates and serves as a raw material is subjected to floatation by the floatation technology, so that the silver and the copper are separated from the zinc leaching residue, part of zinc enters solution simultaneously, and the solution is neutralized by using ammonium hydrogen carbonate to precipitate the zinc. In the method, before the zinc leaching residue enters the rotary kiln, the copper, the silver and part of zinc in the zinc leaching residue can be recovered simultaneously, the recovery rate of the silver is between 75 and 85 percent, the recovery rate of the copper is between 53 and 55 percent, and the recovery rate of the zinc is between 20 and 25 percent. In addition, waste water and waste residues are not generated, and the silver, the copper and part of zinc can be recovered simultaneously.

Description

1. Technical field [0001] The invention relates to a method for recovering zinc, silver and copper from zinc leaching slag. It belongs to the technical field of comprehensive recovery of zinc leaching slag produced by hydrometallurgy, 2. Background technology [0002] The silver and copper in the zinc concentrate are mainly enriched in the zinc leaching slag after boiling roasting and zinc hydrometallurgy leaching, the slag contains 0.01-0.025wt%, copper 0.4-1.3wt%, zinc 10.0-18.0wt% , most silver exists in the form of silver sulfide and natural silver, a small part of silver exists in the form of silver oxide, silver chloride, silver sulfate, silver silicate, etc.; copper exists in the form of copper sulfide, copper oxide, copper hydroxide, etc.; zinc It exists in the form of zinc sulfate, zinc sulfide, and zinc ferrite. The methods for recovering only silver in zinc leaching slag mainly include thiourea method, chloride salt method, sulfate roasting leaching method, flot...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B11/00C22B15/00C22B19/30B03B1/00B03D1/00
CPCY02P10/20
Inventor 吴慧赵斌伍陈长浩李建福穆志芹罗娟
Owner YUNNAN LUOPING ZINC & ELECTRICITY
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