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Sintered iron-containing material, sintered composition, sintered ore and preparation method thereof

A technology of sinter and composition, which is applied in the field of blast furnace smelting, can solve the problems of sinter droplet performance index influence, suspended material, and influence on blast furnace conditions, etc., and achieve good droplet performance, cost reduction, and consumption reduction effect

Active Publication Date: 2021-04-02
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research found that when Brazilian SFLA powder is used to replace part of the iron concentrate powder for ore blending sintering, the droplet performance index of the sintered ore is usually affected, usually when only 3% of Brazilian SFLA powder is used. Affects the condition of the blast furnace and causes suspension of the blast furnace from time to time

Method used

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  • Sintered iron-containing material, sintered composition, sintered ore and preparation method thereof
  • Sintered iron-containing material, sintered composition, sintered ore and preparation method thereof
  • Sintered iron-containing material, sintered composition, sintered ore and preparation method thereof

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preparation example Construction

[0055]In a fourth aspect, the present application provides a method of preparing a sintering ore comprising: sintering the sintering composition provided by the second aspect embodiment. The sintered composition was mixed with a sintering composition prior to sintering treatment.

[0056]In some possible embodiments, the preparation method of the sintered order includes:

[0057]Mix: Wet the sintered iron-containing water, optionally, in a cylindrical mixer, with a wetting material to obtain a wet material.

[0058]Granulation: Mix the moisturizing material, fuel, and flux, optionally, in the secondary cylindrical mixer, the granulation time is 2.5 to 3.5 min to give the particulate material.

[0059]Cloth: Even the particulate material is uniform on the sinter trolley, optionally, control the thickness of the sintered material layer within 750 mm.

[0060]Ignition: Control the sintering machine under negative pressure, optionally, the ignition temperature of the sintering machine is 1000-1100 ° C...

Embodiment 1

[0066]A method of preparing a sintered order, including:

[0067]S1. Fabricated, sintered iron-containing raw materials, as shown in Table 3, the comparison of the sintering composition, as shown in Table 4.

[0068]S2. In a cylindrical mixer, a sintered iron containing water is wetted, and the water distribution is 7.3% to obtain a wetting material.

[0069]S3. In the secondary cylindrical mixer, the moisturizing material, fuel and flux are mixed with granulation, and the granulation time is 3 min to give granule material.

[0070]S4. Even the particulate material is evenly matched on a sintering machine trolley, and the thickness control of the sintered material is controlled in 750 mm.

[0071]S5. Control the ignition of the sintering machine, the ignition temperature of the sintering machine is 1050 ° C, the ignition time is 1.5 min, and the ignition negative pressure is 8000 Pa.

[0072]S6. After the sintering machine is complete, the fuel in the raw material begins to combust, and the sintering...

Embodiment 2

[0076]A method of preparing a sintered order, including:

[0077]S1. It is equipped with a raw material, which is the same as that of the iron-containing raw material ratio and the sintering composition, as in Example 1.

[0078]S2. In a cylindrical mixer, the sintered iron is wetted, and the water distribution is 6.7% to obtain a wetting material.

[0079]S3. In the secondary cylindrical mixer, the moisturizing material, fuel and flux are mixed, and the granulation time is 2.5 min to obtain particulate materials.

[0080]S4. Even the particulate material is evenly matched on a sintering machine trolley, and the thickness control of the sintered material is controlled in 750 mm.

[0081]S5. Control the ignition of the sintering machine, the ignition temperature of the sintering machine is 1000 ° C, the ignition time is 1.5 min, and the ignition negative pressure is 8000 Pa.

[0082]S6. After the sintering machine is complete, the fuel in the raw material begins to combust, and the sintering negative ...

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Abstract

The invention provides a sintered iron-containing material, a sintered composition, sintered ore and a preparation method of the sintered ore, and belongs to the technical field of blast furnace smelting. The sintered iron-containing material comprises, by mass, 5%-11% of Brazil SFLA fines, 14%-20% of yandi fines, 19.5%-25.5% of Australia PB fines, 20%-25.5% of Brazil BRBF fines, 4%-10% of iron concentrate fines, 8%-12% of iron-containing sundries and 10%-14% of sintered return fines. The sintered composition comprises, by mass, 80%-84% of the sintered iron-containing material, 4%-5% of fuel and the balance solvent. The preparation method of the sintered ore includes the steps that sintering processing is conducted on the sintered composition, and the sintered ore is obtained by sinteringthe sintered composition. The sintered ore good in molten drop performance is obtained by replacing part of fine powder with the Brazil SFLA fines, and cost of sintered ore blending is reduced by effectively using the Brazil SFLA fines.

Description

Technical field[0001]The present application relates to the field of blast furnace smelting technology, and in particular, there is a method of sintering iron, sintered composition, sintering and preparation thereof.Background technique[0002]In the steel industry, in order to reduce the cost of raw materials, the common way is as follows: It is equipped with low price, difficult to sinter, but the method has a problem of low proportion. The use of easy-to-low-grade mineral powder and difficult to melt high mine powder is used instead of other mineral powder, which can effectively overcome the problems that have been used alone using the proportional ratio, such as in the prior art, in order to solve the above problems, 1- 5% of the easy-melted low-grade mineral powder with 25-30% of the difficult-melted high-grade mineral powder, combined with Brazil, Australian powder, local powder, sintering and rendering and up to 30-40% of Yang Di powder .[0003]Brazilian sfla powder is a lower c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 毛爱香谢志雄余骏张铁梁欧阳希黄承芳蓝伯洋刘克辉蒙亮田静曾剑峰陈小东
Owner SGIS SONGSHAN CO LTD
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