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A kind of method adopting solid-state reaction to promote chlorine removal in high-chloride zinc oxide powder

A high-chloride zinc-oxygen powder, solid-phase reaction technology, applied in the direction of improving process efficiency and the like, can solve the problems of loss of metal mass, unsatisfactory effect of dechlorination by water, etc., and achieves short reaction time, good economic benefits and application prospects. , the effect of less reagent addition

Active Publication Date: 2021-07-20
唐山鑫联环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, wet dechlorination mainly includes water washing and alkali washing, but the dechlorination effect of water washing is not ideal.
Relatively speaking, the dechlorination effect of alkali washing is much better than that of water washing. Generally, the dechlorination effect can reach more than 90%, but the general operating temperature of alkali washing should be above 80°C. Open, easy to produce a lot of toxic gas

Method used

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  • A kind of method adopting solid-state reaction to promote chlorine removal in high-chloride zinc oxide powder

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Effect test

Embodiment 1

[0041] The present embodiment provides a kind of method adopting solid state reaction to promote chlorine removal in high-chloride zinc oxide powder, described method comprises the following steps:

[0042](1) Take 1000g of high-chloride zinc oxide powder as the experimental raw material, mix it with the solid-phase additive sodium hydroxide at a mass ratio of 100:1, and then put the mixture in a planetary ball mill to control the ball-to-material ratio to 40:1 , the ball milling speed is 400 rpm, and the mechanochemical reaction is carried out for 2.0h;

[0043] (2) After the reaction is completed, the obtained material is taken out and rinsed once with deionized water, and then the solid-phase product obtained is separated from the solid-liquid by a vacuum filtration device, and the solid-phase product after vacuum filtration is placed in an oven for 80 Dry at ℃ to obtain the zinc oxide powder product after dechlorination by solid-state reaction.

[0044] The energy spectru...

Embodiment 2

[0046] The present embodiment provides a kind of method adopting solid state reaction to promote chlorine removal in high-chloride zinc oxide powder, described method comprises the following steps:

[0047] (1) Take 1000g of high-chloride zinc oxide powder as the experimental raw material, mix it with the solid-phase additive sodium hydroxide at a mass ratio of 80:1, and then put the mixture in a planetary ball mill to control the ball-to-material ratio to 30:1 , the milling speed is 500 rpm, and the mechanochemical reaction is carried out for 1.5h;

[0048] (2) After the reaction is completed, the obtained material is taken out and rinsed once with deionized water, and then the solid-phase product obtained is separated from the solid-liquid by a vacuum filtration device, and the solid-phase product after vacuum filtration is placed in an oven for 85 Dry at ℃ to obtain the zinc oxide powder product after dechlorination by solid-state reaction.

[0049] The energy spectrum ana...

Embodiment 3

[0051] The present embodiment provides a kind of method adopting solid state reaction to promote chlorine removal in high-chloride zinc oxide powder, described method comprises the following steps:

[0052] (1) Take 1000g of high-chloride zinc oxide powder as the experimental raw material, mix it with the solid-phase additive sodium hydroxide at a mass ratio of 60:1, and then place the mixture in a planetary ball mill to control the ball-to-material ratio to 20:1 , the ball milling speed is 600 rpm, and the mechanochemical reaction is carried out for 1.0 h;

[0053] (2) After the reaction is completed, the obtained material is taken out and rinsed once with deionized water, and then the solid-phase product obtained is separated from the solid-liquid by a vacuum filtration device, and the solid-phase product after vacuum filtration is placed in an oven for 90 Dry at ℃ to obtain the zinc oxide powder product after dechlorination by solid-state reaction.

[0054] The energy spec...

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Abstract

The invention relates to a method for promoting the removal of chlorine in high-chloride zinc oxide powder by adopting solid-phase reaction. The method comprises: mixing high-chloride zinc oxide powder with a solid-phase additive and then performing ball milling; drying the material obtained after ball milling Dry to obtain the zinc oxide powder product after dechlorination. The invention promotes the removal of chlorine in the high-chloride zinc oxide powder by using mechanical force to induce solid-phase reaction, and the removal efficiency of chlorine can reach more than 99%. Compared with the traditional alkaline cleaning process, it has the advantages of high dechlorination efficiency, low reaction temperature, short reaction time, less reagent addition and less rinsing times, and can effectively solve the problem of chlorine removal in high-chloride zinc oxide powder. In actual production The production cost and operation cost can be reduced, and the method has the characteristics of wide application range, and has good economic benefits and application prospects.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment and resource utilization, in particular to a method for promoting chlorine removal in high-chloride zinc oxide powder by adopting solid-phase reaction. Background technique [0002] The residues of blast furnace iron and steel smelting form a large amount of industrial solid waste gas ash. Gas ash contains dozens of metal elements and is a valuable urban mineral resource. It needs to be refined and recycled to alleviate the tension of metal resources. coming development pressure. [0003] At present, in the industry, these low-grade, high-impurity gas ash and coke are often reacted in a rotary kiln at high temperature to obtain a primary product mainly zinc oxide powder as a raw material for the next step of wet zinc extraction. However, during the high-temperature smelting process of the rotary kiln, the chloride ions in the gas ash form volatile chlorides with metal ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/30C22B19/20C22B7/02
CPCC22B7/001C22B7/02C22B19/20C22B19/30Y02P10/20
Inventor 李金惠马黎阳刘康刘丽丽张武王健月李辉
Owner 唐山鑫联环保科技有限公司
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