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Method for efficiently separating arsenic and antimony in high-arsenic smoke dust

An arsenic fume and high-efficiency technology is applied in the fields of non-ferrous metallurgy environmental protection and comprehensive resource recycling, achieving the effects of good application prospects, simple operation, and easy industrialization.

Pending Publication Date: 2022-02-25
云南锡业研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the problems and deficiencies existing in the existing arsenic and antimony separation techniques, and provides a fire method for efficiently separating arsenic and antimony in high-arsenic dust

Method used

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  • Method for efficiently separating arsenic and antimony in high-arsenic smoke dust

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Experimental program
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Effect test

Embodiment 1

[0016] A method for efficient separation of arsenic and antimony in high-arsenic dust, such as figure 1 As shown, the method steps are as follows:

[0017] (1) Antimony fixation: mix 10kg of high-arsenic dust (arsenic content is 63.76%, antimony content is 0.776%) with 3kg industrial grade MnO 2 (MnO 2 The content is 70wt.%) and mixed evenly, placed in a muffle furnace for roasting, the roasting temperature is 380 ° C, and the reaction is 3h. During this process, As 2 o 3 Into the flue gas, use bag dust to collect As 2 o 3 The flue gas is collected to obtain As 2 o 3 Products (As 2 o 3 content ≥ 99%), after the reaction, arsenic-containing and antimony-rich roasted slag (also called arsenic-removed slag) is obtained. Antimony is enriched in the slag, realizing the effective separation of arsenic and antimony.

[0018] (2) Volatile arsenic: The arsenic-containing and antimony-rich roasted slag was heated up to 650°C in the muffle furnace for 6 hours. During this proce...

Embodiment 2

[0021] A method for efficiently separating arsenic and antimony in high-arsenic dust, the method steps are as follows:

[0022] (1) Antimony fixation: mix 10kg of high-arsenic dust (arsenic content is 69.73%, antimony content is 0.36%) with 3kg industrial grade MnO 2 , 1kg copper oxide (MnO 2 The content is 30wt.%) and mixed evenly, placed in a muffle furnace for roasting, the roasting temperature is 500 ° C, and the reaction is 2h. During this process, As 2 o 3 Flue gas is collected to obtain As 2 o 3 Products (As 2 o 3 content ≥ 99%), after the reaction is completed, arsenic-containing and antimony-rich roasted slag is obtained.

[0023] (2) Volatile arsenic: Continue to heat up the arsenic-containing antimony-rich roasted slag to 750°C for 3 hours. During this process, the volatilized As 2 o 3 The flue gas is collected, and As is obtained after the reaction 2 o 3 Products (As 2 o 3 content ≥ 99%) and secondary materials containing antimony.

[0024] It can be s...

Embodiment 3

[0026] A method for efficiently separating arsenic and antimony in high-arsenic dust, the method steps are as follows:

[0027] (1) Antimony fixation: mix 10kg of high-arsenic dust (arsenic content is 31.69%, antimony content is 1.68%) with 1kg industrial grade MnO 2 , 0.5kg of potassium permanganate, 0.5kg of hydrogen peroxide (MnO 2 The content is 30wt.%) and mixed evenly, placed in a muffle furnace for roasting, the roasting temperature is 300 ° C for 6h, in the process of As 2 o 3 Flue gas is collected to obtain As 2 o 3 Products (As 2 o 3 Content ≥ 99%), after the reaction is completed, arsenic-containing and antimony-rich roasted slag is obtained.

[0028] (2) Volatile arsenic: The obtained arsenic-containing and antimony-rich roasted slag was heated up to 500°C for 4 hours. During this process, the volatilized As 2 o 3 The flue gas is collected, and As is obtained after the reaction 2 o 3 Products (As 2 o 3 content ≥ 99%) and secondary materials containing a...

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Abstract

The invention relates to a method for efficiently separating arsenic and antimony in high-arsenic smoke dust, which comprises the steps of conducting antimony fixation, specifically, adding a solid additive into the high-arsenic smoke dust, uniformly mixing, roasting and reacting for 2 to 6 hours at 300 to 500 DEG C, transforming low-valence antimony oxide in the high-arsenic smoke dust into a high-valence antimony compound which is difficult to volatilize, collecting As2O3 flue gas generated in the roasting process, obtaining an As2O3 product and arsenic-containing antimony-rich roasting slag after the reaction is finished,continuously heating to 500-750 DEG C, carrying out roasting reaction for 3-6 hours, collecting volatilized As2O3 flue gas in the process, and after the reaction is finished, obtaining the As2O3 product and an antimony-containing secondary material. According to the invention, a high-grade As2O3 product is obtained, antimony is stored in slag in a solid mode to be enriched, and effective separation of arsenic and antimony is well achieved. The method is simple to operate and easy to realize industrialization, and has a relatively good application prospect.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metallurgy environmental protection and resource comprehensive recycling, and specifically relates to a method for efficiently separating arsenic and antimony from high-arsenic dust. Background technique [0002] Arsenic is a harmful element that pollutes the environment and is also a harmful element in the non-ferrous smelting process. It often coexists with a variety of non-ferrous metal ores, and enters the smoke and dust during the non-ferrous smelting process to form high-arsenic smoke. In recent years, with the expansion of production and capacity of major non-ferrous smelting enterprises, the depletion of high-grade mineral resources has increased the mining and utilization of complex polymetallic minerals and arsenic-containing minerals, bringing a large amount of arsenic and antimony into production The process produces a large amount of high-arsenic and antimony smoke. In order to c...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B30/02C22B30/04C01G28/00
CPCC22B7/02C22B30/02C22B30/04C01G28/005Y02P10/20
Inventor 孙磊季登会刘新阳黄迎红陈学元刘会讲张春景陈绍雄姜昆秦龙
Owner 云南锡业研究院有限公司
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