Preparation method of carbon-containing micro-electrolysis material

An electrolytic material and micro-electrolysis technology, applied in the field of micro-electrolytic material preparation, can solve the problems of low added value of reduction products, shortened process flow, low product quality, etc., to improve comprehensive utilization effect, benefit the environment, and large specific surface area. Effect

Active Publication Date: 2022-06-03
CENT SOUTH UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of high energy consumption, heavy pollution, large carbon emissions, low product quality, and low added value of reduction products in the traditional carbothermal reduction method for treating zinc-containing dust, the purpose of the present invention is to provide a carbon-containing micro-electrolysis The preparation method of the material realizes the green and high-value utilization of zinc-containing dust, increases its added value, and shortens the process flow

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  • Preparation method of carbon-containing micro-electrolysis material

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Embodiment 1

[0042] The invention provides a preparation method of carbon-containing micro-electrolytic material, comprising the following steps:

[0043] (1) Mix blast furnace dust, electric furnace dust, steel-making converter dust, graphite and 0.5% composite binder (35% of bentonite, 35% of sodium humate and 30% of polyacrylamide) , so that the iron-carbon mass ratio is controlled to 5:1;

[0044] (2) vigorously stirring the obtained mixed material, the stirring speed is 1500rpm, and the stirring time is 3min; then, the high-pressure roller mill is successively carried out, and the high-pressure roller mill has a moisture content of 7% and a roller mill pressure of 1.0N / mm 2 , the grinding time is 2min;

[0045] (3) Add the pretreated material to the disc pelletizing machine for pelletizing, the pelletizing time is 11 minutes, the moisture content of the green pellet is controlled at about 12.5%, and the particle size of the green pellet is controlled at 16-20 mm; the drop strength of...

Embodiment 2

[0050] The invention provides a preparation method of carbon-containing micro-electrolytic material, comprising the following steps:

[0051] (1) Mix blast furnace dust, electric furnace dust, steel-making converter dust, graphite and 1.0% composite binder (35% of bentonite, 35% of sodium humate and 30% of polyacrylamide) , so that the iron-carbon mass ratio is controlled to be 10:1;

[0052] (2) vigorously stirring the obtained mixed material, the stirring speed is 1500rpm, and the stirring time is 3min; then, the high-pressure roller mill is successively carried out, and the high-pressure roller mill moisture is 7.5%, and the roller mill pressure is 1.0N / mm 2 , the grinding time is 3min;

[0053] (3) Add the pretreated material to the disc pelletizing machine for pelletizing, the pelletizing time is 12min, the moisture content of the green pellet is controlled at about 12.5%, and the particle size of the green pellet is controlled at 16-20 mm; the drop strength of the prepa...

Embodiment 3

[0058] The invention provides a preparation method of carbon-containing micro-electrolytic material, comprising the following steps:

[0059] (1) Mix blast furnace dust, electric furnace dust, steel-making converter dust, graphite and 1.5% composite binder (35% of bentonite, 35% of sodium humate and 30% of polyacrylamide) , so that the iron-carbon mass ratio is controlled to be 15:1;

[0060] (2) vigorously stirring the obtained mixed material, the stirring speed is 2000rpm, and the stirring time is 3min; then, high-pressure roller milling is performed successively, and the high-pressure roller milling moisture is 7.5%, and the roller grinding pressure is 1.0N / mm 2 , the grinding time is 3min;

[0061] (3) Add the pretreated material to the disc pelletizing machine for pelletizing, the pelletizing time is 12min, the moisture content of the green pellet is controlled at about 12.5%, and the particle size of the green pellet is controlled at 16-20 mm; the drop strength of the p...

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Abstract

The invention discloses a preparation method of a carbon-containing micro-electrolysis material, which comprises the following steps: S1, optimally proportioning a zinc-containing dust material, a carbon source and a binder to obtain a mixture; s2, intensively and uniformly mixing the mixture obtained in the step S1, and then carrying out high-pressure roller milling and wet milling combined treatment to obtain a uniformly mixed material; s3, pelletizing the uniformly mixed material obtained in the step S2 to obtain green pellets, and drying to obtain dry pellets; and S4, the dry balls obtained in the step S3 are loaded into a gas-based shaft furnace to be subjected to hydrogen reduction treatment, cooling is conducted under the protective atmosphere after reduction, and the carbon-containing micro-electrolysis material is obtained. According to the preparation method of the carbon-containing micro-electrolysis material, Fe and C contained in zinc-containing dust are fully utilized, dezincification of the zinc-containing dust and preparation of the micro-electrolysis material are achieved in one step through a reduction method, the traditional preparation process of the micro-electrolysis material is changed, and short-process and high-value comprehensive utilization of the zinc-containing dust is achieved.

Description

technical field [0001] The invention belongs to the field of preparation of micro-electrolytic materials, and relates to a preparation method of carbon-containing micro-electrolytic materials. Background technique [0002] The iron and steel industry is an important basic industry for my country's economic development, and it is also a large solid waste discharger. During its smelting process, a large amount of dust that is difficult to handle will be generated, such as zinc-containing dust. According to statistics, the total amount of dust produced by iron and steel enterprises is generally 8% to 12% of the steel output, while zinc-containing dust accounts for 20% to 30%. Zinc-containing dust is rich in a variety of heavy metals and is a typical hazardous waste. If it cannot be effectively disposed of, it will inevitably bring serious environmental problems. In order to protect the environment and promote the ecological cycle of the iron and steel industry, it is urgent to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B5/12C02F1/469
CPCC22B1/2406C22B5/12C02F1/4691C02F2101/30Y02P10/20
Inventor 郭正启朱德庆潘建李启厚杨聪聪李思唯
Owner CENT SOUTH UNIV
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