Comprehensive utilization method of arsenic-containing materials

A material, arsenic fume technology, applied in the field of metallurgy, to achieve the effect of strong operability, high resource utilization, and resource utilization

Active Publication Date: 2017-06-13
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can realize arsenic removal from arsenic dust and comprehensive recycling of valuable elements

Method used

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  • Comprehensive utilization method of arsenic-containing materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Taking arsenic-containing soot from a lead-zinc smelter in China as an example, it includes the following main components in terms of mass percentage: Pb 5.26%, As 39.65%, Sn 0.5%, Sb 29.36%, Zn 0.12%, Se 0.04%.

[0043] Weigh a certain mass of the high arsenic and antimony fumes in the reaction kettle, according to the liquid-solid volume mass ratio of 10:1 (ml:g), the stirring speed is 700r / min, the NaOH concentration is 1mol / L, the leaching temperature is 80°C, and the leaching time is 2h. Carry out leaching experiments. After the leaching is finished: remove the slurry and filter and separate; measure the arsenic leaching rate to 72.36%. The concentration of each element in the leach solution is Pb 86.00ppm, Se 1.80ppm, Zn 20.00ppm, Sb 1.36g / L, As 28.69g / L.

[0044] The leaching solution was passed through SO at room temperature 2 Gas reduction, reducing agent SO 2 The amount added is twice the theoretical amount required to reduce all the arsenic ions and telluri...

Embodiment 2

[0049] Taking arsenic-containing soot from a lead-zinc smelter in China as an example, it includes the following main components in terms of mass percentage: Pb 10.39%, As 34.59%, Sn 1.45%, Sb 20.54%, Zn 0.11%, Se 0.24%.

[0050] Weigh a certain mass of the high arsenic and antimony fumes in the reaction kettle, according to the liquid-solid volume mass ratio of 10:1 (ml:g), the stirring speed is 700r / min, the NaOH concentration is 3mol / L, the leaching temperature is 50°C, and the leaching time is 4h. Carry out leaching experiments. After the leaching, the slurry was removed and separated by filtration; the arsenic leaching rate was measured to be 52.06%. The concentration of each element in the leach solution was Pb 87ppm, Se 0.52ppm, Zn71ppm, Sb 1.24g / L, As 18.01g / L.

[0051] The leaching solution was passed through SO at room temperature 2 Gas reduction, reducing agent SO 2 The amount added is twice the theoretical amount required to reduce all the arsenic ions and tellur...

Embodiment 3

[0056] Taking arsenic-containing soot from a lead-zinc smelter in China as an example, it includes the following main components in terms of mass percentage: Pb 19.57%, As 24.26%, Sn 1.47%, Sb 30.45%, Zn 0.16%, Se 0.21%.

[0057] Weigh a certain mass of the high arsenic and antimony fumes in the reaction kettle, according to the liquid-solid volume mass ratio 5:1 (ml:g), stirring speed 1000r / min, NaOH concentration 1mol / L, leaching temperature 30 ℃, leaching time 2h Carry out leaching experiments. After leaching, the slurry was removed and separated by filtration; the arsenic leaching rate was measured to be 42.26%, and the concentrations of elements in the leach solution were Pb 124ppm, Se 0.67ppm, Zn 107ppm, Sb 2.02g / L, and As 10.25g / L.

[0058] The leaching solution was passed through SO at room temperature 2 For gas reduction, the amount of reducing agent added is twice the theoretical amount required to reduce all the arsenic ions and tellurium ions in the leaching solut...

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Abstract

The invention relates to a comprehensive utilization method of arsenic-containing materials. According to the method, production of comprehensive recovery of valuable metals such as arsenic, antimony, lead, bismuth and the like from smelting dust containing the arsenic, the antimony and the lead is performed, accumulation of the arsenic in the system is reduced, and harmless treatment is performed on the arsenic. With the method, through normal pressure alkaline leaching, soluble arsenic in the dust is removed, leaching residues are subjected to procedures of washing, reduction smelting, oxidizing blowing and the like, and various valuable elements are recycled. With the method, the arsenic is removed from the dust and enters a leaching solution, and impurities such as antimony, lead, tin and the like are separated out in the form of precipitates through purification and impurity removal of the leaching solution. A purified solution is used for arsenic salt purification of a zinc sulfate solution during zinc hydrometallurgy, and purification residues are sent for lead smelting, so that separation and harmless treatment of the arsenic and the valuable metals are realized. According to the method, the comprehensive utilization rate of resources is high, the raw material application range is wide, the problem of pollution in the extraction process of the traditional technology is solved, and the method has the more obvious advantages for the dust produced in the lead and zinc smelting process particularly.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for comprehensive utilization of arsenic-containing materials. Background technique [0002] In nature, arsenic is usually known as arsenopyrite (FeAsS), arsenopyrhotite (FeAsS 2 ), Arsenite (FeAs 2 ), arsenite (Cu 3 AsS 3 ), realgar (As 2 S 3 ), orpiment (As 2 S 3 ) and other minerals, which are enriched in non-ferrous metal ores such as copper, lead, zinc, nickel, cobalt, gold and silver; in the process of non-ferrous metallurgy, many high-arsenic solid materials are produced, such as roasting and smelting smoke. These materials contain arsenic as high as 5-50%, and also contain a large amount of valuable metals, which are directly returned to the smelting process, resulting in the accumulation of arsenic in the system. Therefore, arsenic removal should usually be treated separately. Arsenic is a highly toxic and carcinogenic element, and its app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B13/02C22B13/00C22B30/02C22B30/06C22B30/04A62D3/33A62D101/43
CPCA62D3/33A62D2101/43C22B7/001C22B7/008C22B7/02C22B13/025C22B13/045C22B30/02C22B30/04C22B30/06Y02P10/20
Inventor 刘智勇刘志宏刘文德窦传龙林文军伏东才李云新李启厚周亚明柳承辉戴慧敏唐亦秋周萍李思唯
Owner CENT SOUTH UNIV
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