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Device and method for jointly treating antimony-smelting arsenic soda slag through pyrogenic process and wet process

A combined treatment and arsenic-alkali slag technology, applied in the direction of improving process efficiency, can solve the problems of low content, high difficulty, large amount of calcium arsenate slag, etc., and achieve the effects of simple device structure, simple control and strong processing capacity.

Pending Publication Date: 2019-02-22
刘义冬
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Problems solved by technology

The chemical composition of this kind of arsenic-alkali slag with low antimony content and high arsenic content is generally: 1-5 wt% antimony, 5-20 wt% arsenic, 40-60 wt% sodium carbonate. Type, become dangerous solid waste that is more difficult to recycle and treat in the treatment of arsenic-alkali slag, and the large-scale application of this type of arsenic-alkali slag treatment is still blank in the existing technology
[0005] CN104120274B discloses arsenic-alkali slag treatment method and device, adopts all-wet process, mainly separates arsenic and antimony, and returns the separated antimony to the antimony refining system, but the arsenic-containing alkali solution is not further treated, which is an incomplete arsenic-alkali Slag treatment method
However, its disadvantage is that it is a difficult problem to deal with the solution after calcium hydroxide precipitated arsenic, and the content of calcium arsenate produced is generally not high, resulting in a large amount of calcium arsenate slag, which increases the difficulty of subsequent pyrotechnics
However, the disadvantages of this method are that first, antimony and arsenic are reduced with carbon, and it is difficult to control the non-reduction of arsenic; second, a large number of glass blocks will be produced, and long-term storage of glass blocks is also a great environmental risk
However, this method is to recover the valuable metals in the arsenic-alkali slag to obtain an alloy, and the arsenic in the arsenic-alkali slag turns into arsenic-containing dust, which not only has a low content and a large amount, but also has the effect of using this arsenic-containing fume alone as a glass clarifying agent. Not ideal, this is the shortcoming of the process

Method used

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  • Device and method for jointly treating antimony-smelting arsenic soda slag through pyrogenic process and wet process

Examples

Experimental program
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Effect test

Embodiment 1～3

[0059] like figure 1 As shown, the device includes a pretreatment unit, arsenic pyrolysis volatilization unit and wet deep arsenic removal unit; the pretreatment unit includes sequentially connected No. 1 jaw crusher 1-1, No. 1 Raymond mill 2- 1. Concrete mixer 3 and dough making machine 4; said arsenic fire method volatilization unit includes reverberatory furnace 5, soot settling chamber 6, surface cooling device 7, bag filter 8, water foam absorption tower 9 and ion adsorber connected in sequence 10. The wet deep arsenic removal unit includes sequentially connected No. 2 jaw crusher 1-2, No. 2 Raymond mill 2-2, leaching reaction tank 11, stainless steel centrifuge 12, deep arsenic removal reaction tank 13, Box-type filter press 14; the group making machine 4 in the pretreatment unit is connected with the reverberatory furnace 5 feed port 5-1 in the arsenic fire method volatilization unit; the reverberatory furnace 5 in the arsenic fire method volatilization unit is discharg...

Embodiment 1

[0062] (1) Pretreatment: first put 50.0kg of antimony, arsenic and alkali slag 1 into No. 1 jaw crusher 1-1 and crush it to a particle size ≤ 30mm, and then use No. 1 Raymond mill 2-1 to finely grind it to pass 250 mesh Sieve, put the finely ground powder and 10.0kg of arsenic volatile agent (a mixture of 3.3kg of carbon and 6.7kg of silicon dioxide) into the concrete mixer 3 for mixing, and then put the mixture into the dough making machine 4 to compact the dough until the diameter is 20mm agglomerate, get 60.0kg arsenic-alkali slag agglomerate;

[0063] (2) Arsenic fire method volatilization: Mix 60.0kg of arsenic-alkali slag agglomerates obtained in step (1) and 12.0kg of pulverized coal into the reverberatory furnace 5, heat and volatilize at 900°C for 40 minutes, and collect the material from the reverberatory furnace 5 outlet 33.1kg of alkali slag discharged from 5-3 (mass percentage of main components: As 0.56%, Sb 0.05%, Na 2 O 62.85%) and the 4.0kg antimony-containin...

Embodiment 2

[0067] (1) Pretreatment: first put 1000.0kg of antimony, arsenic and alkali slag 2 into No. 1 jaw crusher 1-1 and crush it to a particle size ≤ 25mm, and then use No. 1 Raymond mill 2-1 to finely grind it to pass 300 mesh Sieve, put the finely ground powder and 250.0kg of arsenic volatile agent (a mixture of 62.5kg of carbon and 187.5kg of silicon dioxide) into the concrete mixer 3 for mixing, and then put the mixture into the dough making machine 4 to compact the dough until the diameter is 30mm agglomerates, 1250.0kg arsenic-alkali slag agglomerates;

[0068] (2) Arsenic fire method volatilization: mix 1250.0kg of arsenic-alkali slag agglomerates obtained in step (1) and 320.0kg of pulverized coal into the reverberatory furnace 5, heat and volatilize at 1100°C for 80 minutes, and collect the material from the reverberatory furnace 5 outlet 575.1kg of alkali slag discharged from 5-3 (mass percentage of main components: As 0.52%, Sb 0.04%, Na 2 O 83.35%) and 260.0kg of antimo...

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Abstract

The invention relates to a device and method for jointly treating antimony-smelting arsenic soda slag through a pyrogenic process and a wet process. The device comprises a pretreatment unit, an arsenic pyrogenic process volatilization unit and a wet process deep arsenic removing unit; the pretreatment unit comprises a breaking machine, a fine grinding device, a mixing device and a pelletizing machine which are sequentially connected; the arsenic pyrogenic process volatilization unit comprises an arsenic volatilization furnace, a soot deposition chamber, a surface cooling device and a bag collector which are sequentially connected; the wet process deep arsenic removing unit comprises a breaking machine, a fine grinding device, a leaching reaction tank, a centrifuge, a deep arsenic removal reaction tank and a filter press which are sequentially connected; the pelletizing machine is connected with a feeding port of the arsenic volatilization furnace; an air outlet of the arsenic volatilization furnace is connected with the soot deposition chamber; and a discharging port of the arsenic volatilization furnace is connected to the breaking machine in the wet process deep arsenic removingunit. The invention also discloses the method for jointly treating the antimony-smelting arsenic soda slag through the pyrogenic process and the wet process. The device is simple, control is easy andconvenient, and the processing capability is strong; and by means of the method, the arsenic and antimony volatilization rate is high, cost is low, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to a device and method for processing antimony, arsenic and alkali slag, in particular to a device and method for treating antimony, arsenic and alkali slag in combination with fire method and wet method. Background technique [0002] Antimony is one of the top ten non-ferrous metals, occupies a very important position in the national economy, and has been widely used in transportation, chemical and military industries and other sectors. At present, more than 90% of the antimony smelting production adopts the pyrometallurgical process, and the removal of impurity arsenic in the process of pyrometallurgy will produce toxic slag—arsenic-alkali slag, whose main components are arsenic, antimony, and alkali. In order to eliminate arsenic-alkali In order to avoid the hidden dangers of slag polluting the environment, antimony, arsenic and alkali slag must be properly disposed of. [0003] The existing arsenic-alkali slag treatment metho...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B30/02C22B30/04
CPCC22B7/001C22B7/006C22B7/04C22B30/02C22B30/04Y02P10/20
Inventor 刘义冬刘煌
Owner 刘义冬
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