Comprehensive treatment method for zinc hydrometallurgy high-germanium raw material and calcium sulfite residues

A technology of calcium sulfite and zinc hydrometallurgy, applied in the field of hydrometallurgy, can solve problems such as rising production costs, unrealistic economic and social benefits, and high environmental risks, and achieve the effect of large environmental benefits

Active Publication Date: 2017-06-23
YUNNAN LUOPING ZINC & ELECTRICITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For high-germanium raw materials for zinc smelting, if rotary kiln volatilization is used to recover zinc and germanium after enrichment, it is unrealistic in terms of economic and social benefits; During the process from zinc oxide dust to germanium concentrate, the recovery rate of germanium is only 90wt%~95wt%. 55wt%~75wt%; Secondly, the use of rotary kiln volatilization produces a large amount of water-quenched slag that needs to be treated separately, resulting in increased production costs and high environmental risks

Method used

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  • Comprehensive treatment method for zinc hydrometallurgy high-germanium raw material and calcium sulfite residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Take the zinc leaching slag of high-germanium raw material zinc leached from the wet method of Zinc Electric Co., Ltd. in Yunnan Luoping and the calcium sulfite waste slag produced by the sulfur dioxide tail gas absorption workshop of the rotary kiln respectively, dry and shrink the samples to prepare 20000.00 grams each, and pass through an 80-mesh sieve for use , the main components of the high-germanium raw material zinc leaching residue are: zinc 9.66wt%, iron 13.12wt%, lead 3.25wt%, germanium 0.0216wt%, silver 0.0019wt%;

[0036] (1) Slurry of zinc leaching slag: Use industrial water as pre-liquid, take 60 liters, add 15,000.0 g of zinc leaching slag, a high-germanium raw material, for slurrying, the slurrying time is 40 minutes, stir the slurry evenly, and then proceed to the next step of slurrying chemical pulp leaching;

[0037] (2) Slurry leaching: Use concentrated sulfuric acid to adjust the initial acid 140g / l to the pulp after stirring and slurrying evenly, c...

Embodiment 2

[0047] Take the zinc leaching slag of high-germanium raw material zinc leached from the wet method of Zinc Electric Co., Ltd. in Yunnan Luoping and the calcium sulfite waste slag produced by the sulfur dioxide tail gas absorption workshop of the rotary kiln respectively, dry and shrink the samples to prepare 20000.00 grams each, and pass through an 80-mesh sieve for use , the main components of the high-germanium raw material zinc leaching residue are: zinc 14.86wt%, iron 17.89wt%, lead 4.88wt%, germanium 0.028wt%, silver 0.0047wt%;

[0048] (1) Slurry of zinc leaching slag: use industrial water as pre-liquid, take 65 liters, add 13000.0 g of high germanium raw material zinc leaching slag for slurrying, slurrying time is 45 minutes, stir and slurry evenly before proceeding to the next step of slurrying chemical pulp leaching;

[0049] (2) Slurry leaching: Use concentrated sulfuric acid to adjust the initial acidity to 150g / l for the evenly stirred pulp, control the process tem...

Embodiment 3

[0059] The zinc leaching slag of high-germanium raw material zinc from hydro-smelting of Yunnan Luoping Zinc Electric Co., Ltd. and the calcium sulfite waste slag produced by the sulfur dioxide tail gas absorption workshop of the rotary kiln were respectively taken, dried and divided to prepare samples and passed through an 80-mesh sieve for use. The main components of germanium raw material zinc leaching residue are: zinc 9.5wt%, germanium 0.020wt%, lead 3.0wt%, iron 13.0wt%, silver 0.002wt%;

[0060] (1) Slurry of zinc leaching slag: Slurry the zinc leaching slag with a slurry liquid at a liquid-solid ratio of 4:1 for 40 minutes, stir and slurry evenly before use;

[0061] (2) Slurry leaching: Use concentrated sulfuric acid to adjust the initial acid 140g / l to the evenly stirred pulp, control the process temperature at 93°C, leaching time for 4.0 hours, and filter 1 after the final acid reaches 50g / l. Output No. 1 filter residue and No. 1 filtrate, No. 1 filter residue can b...

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Abstract

The invention discloses a comprehensive treatment method for a zinc hydrometallurgy high-content germanium raw material and calcium sulfite residues. The method comprises the following steps that 1), pulpifying of zinc leaching residues is performed; 2), pulpified ore pulp leaching is performed; 3), neutralization and reduction are performed; 4), calcium residue weak acid washing is performed; and 5), tannic germanium precipitation is performed. According to the comprehensive treatment method, when germanium is directly recycled in the zinc hydrometallurgy process, the simple and convenient method is adopted, the calcium sulfite residues generated when sulfur dioxide is absorbed through a double-alkali method during volatilization of a rotary kiln are comprehensively treated, and a marketable calcium sulfite industrial raw material is obtained; and recycling of resources is achieved, the environmental protection risk is eliminated, the production cost is saved, and meanwhile it is effectively guaranteed that the germanium is smoothly recycled from the zinc hydrometallurgy high-germanium raw material.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for comprehensively treating high-germanium raw materials and calcium sulfite waste residues in hydrometallurgy. Background technique [0002] The raw material of zinc hydrometallurgy is zinc roasted ore, some of which contain relatively high germanium, reaching more than 0.01wt%. The traditional germanium recovery method is that germanium is enriched in the leaching slag of zinc hydrometallurgy, and the leaching slag is volatilized in a rotary kiln, so that valuable metals such as germanium volatilize into the zinc oxide dust, and then the zinc oxide dust is treated with zinc, germanium, etc. Recovery of valuable metals: This method is mainly suitable for low-germanium raw materials that cannot directly recover germanium, and can only be recovered by rotary kiln volatilization and enrichment. [0003] For high-germanium raw materials for zinc smelti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/30C22B13/00C22B11/00C22B41/00C22B3/08C22B7/00C22B5/00
CPCC22B3/08C22B5/00C22B7/007C22B11/042C22B13/04C22B19/30C22B41/00Y02P10/20
Inventor 赵兵伍赵德军杨建兴李尤立周立雄赵保灿陈长浩赵菊华龙国心
Owner YUNNAN LUOPING ZINC & ELECTRICITY
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