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A method for efficient and comprehensive utilization of arsenic and antimony in arsenic and antimony dust

A soot and high-efficiency technology, applied in the direction of improving process efficiency, can solve the problems of a large amount of waste liquid, high cost, secondary pollution, etc., and achieve the effect of recycling, simple process and reducing the number of materials

Active Publication Date: 2019-01-29
红河绿地环保科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the huge amount of material output, not only the cost of transportation and treatment is high, but also a large amount of waste liquid is generated, causing secondary pollution

Method used

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  • A method for efficient and comprehensive utilization of arsenic and antimony in arsenic and antimony dust
  • A method for efficient and comprehensive utilization of arsenic and antimony in arsenic and antimony dust
  • A method for efficient and comprehensive utilization of arsenic and antimony in arsenic and antimony dust

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Experimental program
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Effect test

Embodiment 1

[0021] The arsenic and antimony fumes are classified by a hydrocyclone classification device. The flow rate is 800mL / min, and the feed pressure is 0.03-0.2MPa. According to the particle size, the arsenic and antimony fumes are divided into three particle size dusts. The particle size distribution And element content is shown in Table 1. Add hot water to the fine dust ≤6.5μm obtained by classification at a liquid-to-solid ratio of 5:1, stir and leach at 85°C for 60 minutes, and separate solid and liquid after leaching; slowly add an oxidizer at 3vol% to the leaching solution, continue stirring for 60 minutes, and filter Obtain the oxidized liquid and the oxidized residue; add an appropriate amount of sodium salt solution to the oxidized liquid, mix well, concentrate the crystal at 75℃ under microwave conditions, centrifuge and filter to obtain the sodium arsenate crystals, and the crystallization mother liquor is recycled; the sodium arsenate crystals are sent After the microwav...

Embodiment 2

[0025] The arsenic and antimony smoke dust is classified by a vortex air current classification device. The power is 2.5kW and the feeding rate is 8kg / h. According to the particle size, the arsenic and antimony smoke is divided into three particle size dusts, and their particle size distribution and element content See Table 2. Add hot water to the fine dust ≤5μm obtained by classification at a liquid-solid ratio of 5:1, stir and leach at 85°C for 60 minutes, and separate solid and liquid after leaching; add an oxidizer at 3vol% to the leaching solution, stir continuously for 60 minutes, and filter to obtain an oxidized product Liquid and oxidation residue; add appropriate amount of sodium salt solution to the oxidized liquid, mix well, concentrate and crystallize at 75℃ under microwave conditions, centrifuge and filter to obtain sodium arsenate crystals, the mother liquor of crystallization is recycled; the sodium arsenate crystals are sent to the microwave equipment After bei...

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Abstract

The invention relates to an efficient comprehensive utilization method of arsenic and antimony in arsenic and antimony smoke and belongs to the technical field of non-ferrous metallurgy. The method comprises the specific steps that the arsenic and antimony smoke is subjected to stge treatment, fine powder smoke obtained through separation is put into hot water according to the formula that the liquid-solid ratio is 5:1, agitation leaching is conducted for 60 min at the temperature is 85 DEG C, and solid-liquid separation is conducted after leaching; an oxidizing agent is slowly added into leaching liquid, the volume percentage of the oxidizing agent is 3%, stirring is continuously conducted for 60 min, and arsenic-containing leaching post-liquid and antimony-containing leaching residues are obtained after filtering; a sodium salt solution is added into the leaching post-liquid, the mixture is subjected to low-temperature concentration and crystallization under the microwave condition after sufficient stirring, sodium arsenate crystals are obtained after centrifugal filtering, and crystallization mother liquor is used circularly; and the sodium arsenate crystals are sent to microwave drying equipment to be dried, and products are obtained after drying. According to the method, the arsenic and antimony smoke is subjected to stage treatment according to the grain size, enrichment and separation of arsenic and antimony can be achieved, operation is easy, and the cost is effectively reduced; and separated arsenic-enriched smoke is leached, refined and crystallized, arsenic products are formed for export sales, antimony-containing materials return to the procedure, and resource recycling is achieved.

Description

Technical field [0001] The invention belongs to the technical field of non-ferrous metallurgy, and specifically relates to a method for efficient comprehensive utilization of arsenic and antimony in arsenic and antimony smoke dust. Background technique [0002] Arsenic and antimony dust is a kind of dust with high arsenic content produced in the process of treating lead anode slime by fire method. It also contains a lot of valuable metals such as antimony, lead and cadmium. Arsenic is a highly toxic substance that seriously pollutes the environment. Removing arsenic from arsenic and antimony fumes and recovering other valuable metals is an effective way to eliminate arsenic damage and improve comprehensive resource recovery. However, due to the similar properties of arsenic and antimony, the separation and recovery of arsenic and antimony in high arsenic and antimony dust has always been an important problem faced by non-ferrous smelting enterprises. [0003] At present, the metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B30/02C22B30/04
CPCC22B7/006C22B7/02C22B30/02C22B30/04Y02P10/20
Inventor 谢容生王少龙朱永强张梦影韦加柱谭志敏张福靖吴开武杨鼐
Owner 红河绿地环保科技发展有限公司
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