Comprehensive recovery method for zinc hydrometallurgy arsenic salt purification cobalt-nickel slag

A technology of hydrometallurgy and recovery method, which is applied to the improvement of process efficiency, photography process, instruments, etc., can solve the problems of waste water discharge, etc., and achieve the effect of simple process, beneficial to the purification of arsenic salt, and low production cost

Active Publication Date: 2020-02-21
湖南株冶有色金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three methods are similar, all have the problem of wastewater discharge, and the toxic gas arsine will be produced in the selective zinc leaching step

Method used

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  • Comprehensive recovery method for zinc hydrometallurgy arsenic salt purification cobalt-nickel slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step A. Drying: Dry the cobalt-nickel slag purified from zinc arsenic salts by wet smelting under the protection of nitrogen. The drying temperature is 300°C, the drying time is 9h, the pressure is 30Pa, the oxygen concentration is 1.5%, and the moisture content of the dried material is 100%. Min content 0.5%.

[0028] Step B, vacuum reduction evaporation: mix the dried cobalt-nickel slag and 3% coking coal in the total weight percentage into a vacuum reduction furnace, the system pressure is 30Pa, the temperature is 500°C, and the time is 90min, to obtain arsenic metal powder; then Under the condition of constant pressure, the temperature was raised to 960°C for 60 minutes, and zinc powder was collected, and the bottom of the furnace was copper-cobalt-lead alloy.

[0029] Step C, copper electrowinning: cast copper-cobalt-lead alloy into an anode and put it into copper sulfate electrolyte for copper electrowinning, the electrolysis temperature is 50°C, and the current d...

Embodiment 2

[0033] Step A. Drying: Dry the cobalt-nickel slag purified by the wet-process zinc arsenic salt under the protection of argon. The drying temperature is 600°C, the drying time is 2h, the pressure is 80Pa, the oxygen concentration is 2.8%, and the moisture content of the dried material is The percentage content is 3.0%.

[0034]Step B. Vacuum reduction and evaporation: Mix the dried cobalt-nickel slag and 7% coking coal in the total weight percentage into the vacuum reduction furnace, the system pressure is 20Pa, the temperature is 700°C, and the time is 60min, to obtain arsenic metal powder; then Under the condition of constant pressure, the temperature was raised to 860°C for 90 minutes, and zinc powder was collected, and the bottom of the furnace was copper-cobalt-lead alloy.

[0035] Step C, copper electrowinning: cast copper-cobalt-lead alloy into an anode and put it into copper sulfate electrolyte for copper electrowinning, the cathode is a titanium plate, the electrolysi...

Embodiment 3

[0039] Step A. Drying: Dry the cobalt-nickel slag purified from zinc arsenic salts by wet smelting under the protection of carbon dioxide. The drying temperature is 500°C, the drying time is 5h, the pressure is 50Pa, the oxygen concentration is 2.5%, and the moisture content of the dried material is 100%. Min content 1.5%.

[0040] Step B. Vacuum reduction and evaporation: Mix the dried cobalt-nickel slag and 5% coking coal in the total weight percentage into a vacuum reduction furnace, the system pressure is 25Pa, the temperature is 600°C, and the time is 80min, to obtain arsenic metal powder; then Under the condition of constant pressure, the temperature was raised to 900°C for 80 minutes, and zinc powder was collected, and the bottom of the furnace was copper-cobalt-lead alloy.

[0041] Step C, copper electrowinning: cast copper-cobalt-lead alloy into an anode and put it into copper sulfate electrolyte for copper electrowinning, the electrolysis temperature is 60°C, and the...

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Abstract

The invention discloses a comprehensive recovery method for zinc hydrometallurgy arsenic salt purification cobalt-nickel slag. The zinc hydrometallurgy arsenic salt purification cobalt-nickel slag isdried in inert atmosphere, the dried cobalt-nickel slag and coking coal are mixed to be added into a vacuum reducing furnace to be subjected to stage evaporation, arsenic metal powder and alloy zin powder are obtained, and a copper-cobalt-lead alloy is formed at the furnace bottom; the copper-cobalt-lead alloy is cast into an anode to be placed in copper sulfate electrolyte to be subjected to copper electrodeposition, and when the cobalt content reaches 5 g/L, the electrolyte is subjected to open circuit treatment; and calcium hypochlorite is added to the cobalt-containing electrolyte obtainedafter circuit opening treatment is carried out, a cobalt raw material is obtained, and purified liquid obtained after cobalt sedimentation is subjected to copper return electrodeposition to be used as electrolyte. Recovery of the cobalt-nickel slag has the advantages of being reasonable in process, low in separation cost, free of pollution, free of toxins and the like.

Description

technical field [0001] The invention relates to the field of resource utilization of cobalt-nickel slag purified by zinc arsenic salts in wet smelting, in particular to a comprehensive recovery method for cobalt-nickel slag purified by zinc arsenic salts in wet smelting. Background technique [0002] In the process of hydrometallurgy at home and abroad, due to the use of zinc powder + arsenic trioxide purification (referred to as arsenic salt purification) to remove cobalt, the consumption of zinc powder is low, the deep purification effect is good, and the copper slag and cobalt nickel slag produced are rich in valuable metals Compared with other high-quality products, Zhuzhou Smelting Group Co., Ltd. adopts deep purification of arsenic salt to remove cobalt in the purification of zinc sulfate solution, with an annual output of 1500-1800 tons of cobalt-nickel slag, which contains 42-53% of valuable metals Cu, 1.5-5.0% of Co, Zn 8 -13%, while containing As up to 8-15%. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B5/10C22B13/02C22B19/04C22B19/30C22B30/04C25C1/12
CPCC22B5/10C22B7/001C22B7/006C22B13/025C22B13/045C22B19/04C22B19/30C22B23/0461C22B30/04C25C1/12Y02P10/20
Inventor 廖贻鹏周玉琳王勇林文军唐亦秋刘敏彭海良张桂海
Owner 湖南株冶有色金属有限公司
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