Preparation method and application of blast furnace sintering-free cold-bonded pellets

A cold-solidified pelletizing and sintering-free technology is applied in the field of blast furnace smelting, which can solve the problems of the cold-solidified pellets failing to meet the requirements of the blast furnace charge, high carbon emissions, heavy pollution, etc., so as to reduce the amount of coke used and reduce emissions. , the effect of reducing pollution

Inactive Publication Date: 2022-05-24
唐山金沙燃烧热能股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention proposes a preparation method and application of blast furnace sintering-free cold solidified pellets, which solves the problem that the cold solidified pellets in the prior art cannot meet the requirements of blast furnace charge, and at the same time solves the heavy pollution in the traditional pre-iron process, High energy consumption and high carbon emissions in the ironmaking process

Method used

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  • Preparation method and application of blast furnace sintering-free cold-bonded pellets

Examples

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Effect test

Embodiment 1

[0039] A preparation method of blast furnace-free sintering cold-set pellets, comprising the following steps:

[0040] S1. Ingredients: prepare iron powder with iron content ≥ 65% and silicon content ≤ 6%;

[0041] S2, drying the iron powder in S1 to a moisture content of 4%;

[0042]S3, the iron powder and the binder, high calcium powder, high magnesium powder in S2 are stirred and mixed uniformly in a high-efficiency strong mixer to obtain a mixture, wherein the binder is composed of the following components according to weight percentage: epoxy resin 80%, phenolic resin 10%, coupling agent 2%, magnesium chloride 2%, dextrin 4%, Yuanming powder 1%, urea-formaldehyde resin 1%, iron powder and binder, high calcium powder, high magnesium powder The mass ratio is 83:2:12:3;

[0043] S4, carrying out the secondary stirring and mixing of the mixture in a high-efficiency strong mixer;

[0044] S5. Press into a sphere in a high-pressure ball press;

[0045] S6. The spheres are s...

Embodiment 2

[0048] A preparation method of blast furnace-free sintering cold-set pellets, comprising the following steps:

[0049] S1. Ingredients: prepare iron powder with iron content ≥ 65% and silicon content ≤ 6%;

[0050] S2, drying the iron powder in S1 to a moisture content of 5%;

[0051] S3, the iron powder and the binder, high calcium powder, high magnesium powder in S2 are stirred and mixed uniformly in a high-efficiency strong mixer to obtain a mixture, wherein the binder is composed of the following components according to weight percentage: epoxy resin 78%, phenolic resin 12%, coupling agent 2%, magnesium chloride 1%, dextrin 5%, Yuanming powder 1%, urea-formaldehyde resin 1%, iron powder and binder, high calcium powder, high magnesium powder The mass ratio is 82:2:13:3;

[0052] S4, carrying out the secondary stirring and mixing of the mixture in a high-efficiency strong mixer;

[0053] S5. Press into a sphere in a high-pressure ball press;

[0054] S6. The spheres are ...

Embodiment 3

[0057] A preparation method of blast furnace-free sintering cold-set pellets, comprising the following steps:

[0058] S1. Ingredients: prepare iron powder with iron content ≥ 65% and silicon content ≤ 6%;

[0059] S2, drying the iron powder in S1 to a moisture content of 5%;

[0060] S3, the iron powder and the binder, high calcium powder, high magnesium powder in S2 are stirred and mixed uniformly in a high-efficiency strong mixer to obtain a mixture, wherein the binder is composed of the following components according to weight percentage: epoxy resin 75%, phenolic resin 14%, coupling agent 2%, magnesium chloride 1%, dextrin 4%, Yuanming powder 2%, urea-formaldehyde resin 2%, iron powder and binder, high calcium powder, high magnesium powder The mass ratio is 85:2:11:2;

[0061] S4, carrying out the secondary stirring and mixing of the mixture in a high-efficiency strong mixer;

[0062] S5. Press into a sphere in a high-pressure ball press;

[0063] S6. The spheres are ...

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Abstract

The invention relates to the technical field of blast furnace smelting, and provides a preparation method and application of a blast furnace sintering-free cold-bonded pellet, and the preparation method comprises the following steps: S1, burdening: preparing fine iron powder of which the iron content is greater than or equal to 65%; s2, the fine iron powder in the S1 is dried until the moisture content is 3%-5%; s3, carrying out primary stirring on the fine iron powder in the S2, a binder, high-calcium powder and high-magnesium powder to obtain a mixture; s4, carrying out secondary stirring on the mixed material; s5, pressing into balls; s6, the balls are shaped and screened; and S7, the pellets of the oversize materials are dried and cured, and the blast furnace sintering-free cold-bonded pellets are obtained after drying. The invention further provides application of the blast furnace sintering-free cold-bonded pellets in blast furnace ironmaking. By means of the technical scheme, the problem that in the prior art, cold-bonded pellets cannot meet the requirement for furnace charge entering a blast furnace is solved, and meanwhile the problems that in a traditional pre-ironmaking technology, pollution is heavy, energy consumption is high, and carbon emission in the ironmaking process is high are solved.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular, to a preparation method and application of blast furnace-free sintering cold-solid pellets. Background technique [0002] Since the 21st century, environmental pollution has increasingly become one of the factors hindering the development of the world. The rapid rise of the iron and steel industry has caused serious pollution of the atmosphere and water bodies, great changes in the climate, the danger of resource depletion, the decline of energy and resource production in many areas, and the continuous destruction of the entire ecosystem on the earth. The rapid development of my country's steel industry has made my country's steel output ranking first in the world for many years. The development of the steel industry and the increase in output have changed and affected the environment. It has more complex and serious environmental pollution, such as land abandonment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244C21B5/00
CPCC22B1/2406C22B1/244C21B5/008Y02P10/20
Inventor 刘立保冯铁恒马怡琳刘勋刘春美杨朋樊学红胡丽丽韩玉杰
Owner 唐山金沙燃烧热能股份有限公司
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