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A method for comprehensive recovery of zinc and germanium from lead slag

A technology of lead slag and zinc germanium, applied in the direction of improving process efficiency, etc., can solve problems such as difficult practical production, lower germanium recovery rate, and large acid consumption, so as to improve economic and social benefits, improve germanium recovery rate, The effect of improving the quality of lead

Active Publication Date: 2021-09-24
YUNNAN LUOPING ZINC & ELECTRICITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This method also does not rationalize the recovery of zinc and germanium
[0007] 2. "Yunnan Metallurgy" (Vol. 26, No. 1, February 1997, author: Kunming Institute of Metallurgy, Zuo Yizhuan, etc.) "Investigation on the phase composition and treatment method of a foreign germanium-rich slag", the article discusses It is to treat the germanium in the zinc ore and germanium slag in the zinc smelting industry. It is leached with sulfuric acid and hydrofluoric acid. slag, which will reduce the recovery rate of germanium; in addition, the author claims that this method still needs to be further studied in overcoming the harmful effects of fluoride ions, which is also a point emphasized in this paper, so this method is also difficult to apply to practical production
This method discharges sewage, causing severe pressure on environmental protection, and at the same time, fluorine ion damage, resulting in a serious waste of resources
Therefore, this method does not meet the requirements of national environmental protection and limited resource comprehensive recycling and sustainable development.
[0009] 4. "Technical Research and Progress of Comprehensive Recovery of Gallium and Germanium from Zinc Leach Slag" published in "Hydrometallurgy" (published on June 15, 2007, author: Fankou Lead-Zinc Mine, Cai Jiangsong, etc.), the article uses the common The pressure acid leaching method for leaching gallium and germanium from the zinc leaching slag is difficult to apply in practical production due to the large consumption of acid and serious environmental pollution
[0010] Generally speaking, there is still no good technical method for recovering zinc and germanium from lead slag by wet method at present. In view of the above problems, it is urgent to invent a method for comprehensively recovering zinc and germanium from lead slag

Method used

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  • A method for comprehensive recovery of zinc and germanium from lead slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take 20,000 grams of lead slag produced by a company in Yunnan and dry it for use. The lead slag contains 25.8% moisture, 16.5wt% zinc, 0.023wt% germanium, 13.6wt% lead, and 0.17wt% fluorine.

[0051] 1) Slurrying of lead slag: take 30 liters of industrial water, add 10,000 grams of lead slag for slurrying, the slurrying time is 10 minutes, stir and slurry evenly before use;

[0052] 2) Lead slag flotation: add 60.0 milliliters of 5% butyl xanthate aqueous solution to the ore pulp after stirring and slurrying evenly, and the dosage is 300 g / ton of butyl xanthate for lead slag; add 0.2 gram pinitol after stirring for 10 minutes Oil, pine alcohol oil with dosage of 20 grams / ton of lead slag; aeration for 2 minutes, scraping foam for flotation, output No. 1 concentrate and No. 1 tailings slurry;

[0053] 3) Dehydration of No. 1 concentrate: No. 1 concentrate is dehydrated through filtration I to obtain 3360 grams of No. 2 concentrate and 6.6 liters of No. 1 filtrate. No. ...

Embodiment 2

[0062] Take 20,000 grams of lead slag produced by a company in Yunnan and dry it for use. The lead slag contains 23.8% moisture, 11.4wt% zinc, 0.039wt% germanium, 17.6wt% lead, and 0.11wt% fluorine.

[0063] 1) Slurrying of lead slag: Take 40 liters of germanium sinking solution, add 10,000 grams of lead slag for slurrying, the slurrying time is 10 minutes, stir and slurry evenly before use. After sinking germanium, the liquid contains 4.2 g / L zinc, 0.006 g / L germanium, and 4.6 g / L fluorine;

[0064] 2) Lead slag flotation: add 80 milliliters of 5% butyl xanthate aqueous solution to the ore pulp after stirring and slurrying evenly, and the dosage is 400 g / ton of butyl xanthate for lead slag; add 0.25 gram pinitol after stirring for 10 minutes Oil, pine alcohol oil with dosage of 25 grams / ton of lead slag; aeration for 2 minutes, scraping foam and carrying out flotation to produce No. 1 concentrate and No. 1 tailings slurry;

[0065] 3) Dehydration of No. 1 concentrate: No. 1 ...

Embodiment 3

[0074] Take 20,000 grams of lead slag produced by a company in Yunnan and dry it for use. The lead slag contains 29.2% moisture, 18.6wt% zinc, 0.031wt% germanium, 16.4wt% lead, and 0.14wt% fluorine.

[0075] 1) Slurry of lead slag: Take 50 liters of germanium-sedimented liquid, add 10,000 grams of lead slag for slurrying, the slurrying time is 10 minutes, stir and slurry evenly before use. After sinking germanium, the solution contains 5.8 g / L of zinc, 0.0036 g / L of germanium, and 8.12 g / L of fluorine;

[0076] 2) Lead slag flotation: add 100 milliliters of 5% butyl xanthate aqueous solution to the ore pulp after stirring and pulping evenly, and the dosage is 500 g / ton of butyl xanthate for lead slag; add 0.3 gram pinitol after stirring for 10 minutes Oil, pine alcohol oil with dosage of 30 grams / ton of lead slag; aeration for 2 minutes, scraping foam and carrying out flotation to produce No. 1 concentrate and No. 1 tailings slurry;

[0077] 3) Dehydration of No. 1 concentrat...

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Abstract

The invention discloses a method for comprehensively recovering zinc and germanium from lead slag, which is used to realize the harmless utilization of the whole process of lead slag and the comprehensive recovery of valuable metals zinc and germanium. The lead slag of the present invention is first slurried, then flotation, and the zinc is floated out into the concentrate, and the concentrate is incorporated into the zinc concentrate to be boiled and roasted to recover zinc and sulfur; the flotation tailings are leached with sulfuric acid and fluoride, recovered Zinc and germanium, the leaching slag is lead concentrate, and the leaching solution is the pre-precipitation solution of germanium; The liquid after germanium is returned to the slurrying stage as a slurrying liquid; when the zinc in the liquid after germanium precipitation is enriched to a certain amount, use a neutralizer to neutralize the deposited zinc, recover zinc, and form an open circuit for zinc, and return the neutralized liquid to In the pulping stage, it is used as a pulping liquid, which can form the recycling of fluoride ions. The invention can not only solve the problem of harmful effects of fluorine ions, but also comprehensively recover zinc and germanium, thereby meeting the requirement of comprehensive recycling of resources.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy, and in particular relates to a method for comprehensively recovering zinc and germanium from lead slag. Background technique [0002] To protect the clear water and blue sky and build a green home together, we actively respond to the requirements of national environmental protection and comprehensive recycling of limited resources and sustainable development. [0003] The zinc-containing slag and zinc-containing waste produced by the zinc hydrometallurgy industry are produced by zinc volatilization kiln to produce zinc oxide powder to recover valuable metals. Zinc oxide powder or oxidized calcine undergoes a low leaching and then a second high-temperature high-acid leaching, and the resulting lead-containing slag is the lead slag. [0004] Taking this lead slag produced by a certain company in Yunnan as an example, its main components are: 10wt%-20wt% of zinc, 0.02wt%-0.04wt% of ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B1/00C22B1/02C22B3/08C22B19/04C22B19/30C22B41/00
CPCC22B1/005C22B1/02C22B3/08C22B7/007C22B7/04C22B19/04C22B19/22C22B19/30C22B41/00Y02P10/20
Inventor 吴慧陈长浩李尤立张龙赵兵伍龙国心赵菊华
Owner YUNNAN LUOPING ZINC & ELECTRICITY
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