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Wet separation method for valuable metals in purified liquid cobalt slags of wet zinc smelting system

A technology of wet separation and zinc smelting, which is applied in the field of comprehensive waste slag separation, can solve problems such as the environmental impact of cobalt slag piles, and achieve the effects of low comprehensive utilization efficiency, reduced environmental pollution, and reasonable processes

Active Publication Date: 2010-09-22
HENAN YUGUANG ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can not only effectively separate the cobalt slag, but also solve the problem of the impact of cobalt slag stockpiling on the environment

Method used

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  • Wet separation method for valuable metals in purified liquid cobalt slags of wet zinc smelting system
  • Wet separation method for valuable metals in purified liquid cobalt slags of wet zinc smelting system
  • Wet separation method for valuable metals in purified liquid cobalt slags of wet zinc smelting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: see figure 1 , the specific steps of the wet separation method of valuable metals in the net liquid cobalt slag of the wet electro-zinc system are as follows:

[0029] (1) Neutral leaching of cobalt slag

[0030] 1. Raw materials: net liquid cobalt slag, sulfuric acid, water

[0031] 2. The purpose of the process: leaching the cobalt slag of the net liquid with high metal content such as zinc and cobalt with dilute sulfuric acid, and the metal zinc, cobalt and their oxides are all dissolved in dilute sulfuric acid, while the lead in the slag is insoluble in dilute acid and enters The leaching slag forms lead sludge, and the obtained solution is a neutral leachate, so as to achieve the purpose of separating zinc, cobalt and lead sludge.

[0032] 3. Process conditions: (1) Control the liquid-solid ratio of 4-5:1 (2) The initial concentration of dilute sulfuric acid is 100-120g / l (3) The leaching temperature is 80-85°C (4) The leaching time is 4-5h (5) Reac...

Embodiment 2

[0062] Embodiment 2: The wet separation method of valuable metals in the net liquid cobalt slag of the wet-process electric zinc system is basically the same as that of Embodiment 1, and the similarities will not be repeated. The difference is that:

[0063] (1) Neutral leaching of cobalt slag

[0064] (1) Control the liquid-solid ratio to 4-5:1 (2) The initial concentration of dilute sulfuric acid is 115g / l (3) The leaching temperature is 82-83°C (4) The leaching time is 4-5h (5) The pH value of the solution at the end of the reaction is 5.0-5.2 .

[0065] Zn: 140g / l, Co: 2g / l in the obtained immersion liquid; Zn: 26.5%, Co: 0.2% in the immersion cobalt slag.

[0066] (2) Cobalt slag acid leaching

[0067] (1) Control the liquid-solid ratio to 5-6:1 (2) The leaching temperature is 80-85°C (3) The leaching time is 4-5 hours

[0068] (4) Initial acidity 140g / l (5) Final acidity 70g / l

[0069] The contents of Zn, Co and Pb in the obtained acid leaching lead sludge (Zn: 7.5%,...

Embodiment 3

[0076] Embodiment 3: The wet separation method of valuable metals in the net liquid cobalt slag of the wet-process electric zinc system is basically the same as that of Embodiment 1, and the similarities will not be repeated. The difference is that:

[0077] (1) Neutral leaching of cobalt slag

[0078] (1) Control the liquid-solid ratio of 4-5:1 (2) The initial concentration of dilute sulfuric acid is 110g / l (3) The leaching temperature is 82-83°C (4) The leaching time is 4-5h (5) The pH value of the solution at the end of the reaction is 5.0-5.2 .

[0079] Zn: 128g / l, Co: 1.7g / l in the obtained immersion liquid; Zn, Co content in the immersion cobalt slag (Zn: 22.8%, Co: 0.35%.

[0080] (2) Cobalt slag acid leaching

[0081] (1) Control the liquid-solid ratio to 5-6:1 (2) The leaching temperature is 80-85°C (3) The leaching time is 4-5 hours

[0082] (4) Initial acidity 125g / l (5) Terminal acidity 65g / l

[0083] Zn: 5.5%, Co: 0.03%, Pb: 27% in the obtained acid leaching l...

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Abstract

The invention relates to a wet separation method for valuable metals in purified liquid cobalt slags of a wet zinc smelting system, which comprises the processes of neutral leaching of cobalt slags, acid leaching of the cobalt slag, removal of iron in neutrally leached liquid, removal of cobalt in the neutrally leached liquid and the like and concretely comprises the following steps: firstly, sieving and crushing the purified liquid cobalt slags in the wet zinc smelting process; carrying out segmented leaching in a sulfuric acid system; separating leached ore pulp to obtain lead slags; treating impurities in the leached liquid; and adding oxidant into the treated leached liquid for separating Fe and Co to obtain high cobalt concentrate with the cobalt content more than 15%, wherein the high cobalt concentrate can be used as a cobalt smelting raw material to be sold. The invention can effectively recover the valuable metals such as cobalt, zinc, lead and the like in the purified liquid cobalt slags, outputs the lead slags, the high cobalt concentrate and electrolytic zinc, realizes the effective utilization of waste slags, solves the problem of treatment of the waste slags in the wet zinc smelting process, and achieves the purpose of comprehensively recycling resources.

Description

technical field [0001] The invention relates to a comprehensive separation method for intermediate waste slag (clean liquid cobalt slag) in the field of wet zinc smelting, in particular to a method for wet separation of valuable metals in the net liquid cobalt slag of a wet zinc smelting system. Background technique [0002] Cobalt is one of the elements associated in the raw materials of lead and zinc production that is harmful to the zinc hydrometallurgy system. During the normal production process of the zinc hydrometallurgy system, the presence of cobalt will cause a closed loop of the system and increase the consumption of raw and auxiliary materials. , affecting the stability of the system and bringing certain problems to production. At present, the net liquid cobalt slag of enterprises is often disposed of in the form of stockpiling, which will have a certain impact on the environment. At the same time, the net liquid cobalt slag contains a large amount of valuable me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/46C22B7/00C22B13/00C22B19/00C22B23/00
CPCY02P10/20
Inventor 倪恒发翟爱萍张新庄张利涛张全胜牛军民
Owner HENAN YUGUANG ZINC IND
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