Proportioning method for high-arsenic smoke material for sublimation and arsenic removal

An arsenic dust and arsenic removal technology, which is applied in the direction of improving process efficiency and can solve the problems of low arsenic removal rate and unfavorable high-efficiency production

Inactive Publication Date: 2016-06-01
YAN XIN ENVIRONMENTAL PROTECTION & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using reducing high-arsenic fume or oxidative high-arsenic fume to sublimate arsenic removal alone, the metal separation rate is high, but the arsenic removal rate is low, generally only about 40%-50%, which is obviously not conducive to large-scale high-efficiency production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1 Rotary kiln (horse boiling furnace method) sublimation dearsenic

[0011] (1) Take 206.18g of reducing high-arsenic dust produced by blast furnace, of which, Pb25%, Sb5%, As 2 o 3 30%, H 2 O3%; (2) Take 153.06g of oxidative high-arsenic fumes produced by the reverberatory furnace, of which, Pb8%, Sb25%, As 2 o 3 40%, H 2 O2%; (3) Mix the above-mentioned two kinds of high-arsenic fumes evenly, and then put the mixed material into an iron pan with a material layer thickness of 10-20mm; (4) Put the iron pan into the horse boiling furnace, heat up to 150°C, and keep it warm for 40 minutes. ⑸The horse boiling furnace continues to heat up to 280°C, and keep it warm for 90 minutes until the smoke is thin; ⑹Continue to heat up in sequence: 320°C, keep warm for 30 minutes; Minutes, the process is over. (8) The weight of the arsenic removal residue is 234.0g, of which, Pb26%, Sb17.8%, As 2 o 3 12.94%, H 2 O0%; ⑼ The weight of dust from arsenic removal is 115...

Embodiment 2

[0014] Example 2 Granulation Shaft Furnace Sublimation Removal of Arsenic

[0015] (1) Take 3075g of reducing dust produced by blast furnace, of which, Pb25%, Sb15%, As 2 o 3 25%, H 2 O2.5%; (2) Take 2218.8g of oxidative dust from lead sintering furnace, of which, Pb16%, Sb28%, As 2 o 3 35%, H 2 O3.2%; (3) mix the above two soot materials evenly in the iron pan; (4) spray and add water in the pan to granulate, and granulate into pellets with a diameter of 1-10mm; (5) sieve 2050g fine particles with a 3mm aperture; ⑹Sieve 2400g spare granules with a sieve with an aperture of 8mm; ⑺Select 2325.5g of granules with a diameter of 3-8mm, containing 14% of granulation water, dry weight 2000g, ingredients: Pb21.24%, Sb20.43%, As 2 o 3 29.17%, placed in a thermal insulation steel pipe with a diameter of 100mm and a leak-proof screen at the bottom, the accumulation ratio of the pellets is 1.65, and the grain consumption height is 179.5mm; 60 minutes; ⑼The temperature of the hot a...

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Abstract

The invention discloses a proportioning method for high-arsenic smoke material for sublimation and arsenic removal. According to the method, reducing high-arsenic smoke and oxidizing high-arsenic smoke are respectively collected according to different production environments of the high-arsenic smoke material, and then the collected reducing high-arsenic smoke and the collected oxidizing high-arsenic smoke are mixed uniformly for serving as the high-arsenic smoke material for sublimation and arsenic removal according to the weight percentage ratio being 20-80% to 20-80%. After the reducing high-arsenic smoke and the oxidizing high-arsenic smoke are reasonably proportioned, the arsenic removal rate of sublimation and arsenic removal can be greatly increased, the metal separation rate of sublimation and arsenic removal can keep high, and large-scale and high-efficiency production can be realized. The method is simple, practicable and efficient; the arsenic removal rate can reach 70-80% through the method and is far higher than the sublimation and arsenic removal rate of single high-arsenic raw material or untargeted proportioning in the prior art.

Description

technical field [0001] The invention relates to a method for removing arsenic from high-arsenic fume materials to recover valuable metals, in particular to a method for properly proportioning the reductive and oxidative high-arsenic fumes in the high-arsenic fume to increase the rate of sublimation and arsenic removal Methods. Background technique [0002] In the non-ferrous metal industry, the high-arsenic fume generated under different environmental conditions can be divided into reducing high-arsenic fume and oxidative high-arsenic fume according to reducing or oxidizing conditions. Reducing high-arsenic dust generally includes blast furnace smelting dust, which is extremely fine-grained arsenic and metal elements in the zero-valent state that volatilize and gasify under strong reducing conditions, so it is called reducing dust. Oxidative high-arsenic dust generally includes very fine arsenic and metals volatilized at high temperature in converters or radiation furnaces....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B1/11
CPCC22B1/11C22B7/02Y02P10/20
Inventor 石仁章梁金凤石宏娇石俊阳王小明汪琴梁伟梁斌
Owner YAN XIN ENVIRONMENTAL PROTECTION & TECH CO LTD
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