A low-carbon, environment-friendly and high-efficiency sintering method of adding sintering fuel in stages

A sintering method and fuel classification technology, applied in the field of metallurgy, can solve the problems of low utilization rate of fine-grained fuel and serious pulverization, and achieve the effects of improving sintering technical indicators, small changes and strong practicability

Active Publication Date: 2022-03-18
WUKUN STEEL
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-carbon, environment-friendly and high-efficiency sintering method for sintering fuel by grading and dividing, which mainly solves the problems of serious crushing and low utilization rate of fine-grained fuel in the open-circuit crushing process of sintered anthracite

Method used

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  • A low-carbon, environment-friendly and high-efficiency sintering method of adding sintering fuel in stages
  • A low-carbon, environment-friendly and high-efficiency sintering method of adding sintering fuel in stages
  • A low-carbon, environment-friendly and high-efficiency sintering method of adding sintering fuel in stages

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Experimental program
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Effect test

Embodiment 1

[0046] Carry out raw material proportioning according to the proportioning of Table 1, under the same sintering condition, according to the sintering method that the fuel is provided by the present invention has been carried out the sintering effect contrast of traditional method, as shown in Table 2 and Table 3:

[0047]1. The ratio of raw materials for sintering is shown in Table 1:

[0048] Table 1 Raw material ratio for sintering (%)

[0049]

[0050] 2. The particle size composition of sintered ore is shown in Table 2:

[0051] Table 2 Sinter particle size composition

[0052]

[0053] As can be seen from Table 2, compared with traditional sintering, the "fuel classification and addition" provided by the present invention has little change in sintering return ore rate and uniformity coefficient, but the average particle size is reduced, mainly due to the 31.18% increase in down-sintering speed, The sinter is broken under the condition of rapid cooling.

[0054] 3...

Embodiment 2

[0058] Embodiment 2: Carry out sintering test comparison of Kulan powder single mineral species through the method of the present invention and the traditional method for sintering

[0059] Carry out raw material proportioning according to the proportioning of Table 4, under the same sintering condition, according to the sintering method provided by the present invention, the fuel is classified and added and compared with the sintering effect of the traditional method as shown in Table 5 and Table 6:

[0060] 1. The ratio of raw materials for sintering is shown in Table 4:

[0061] Table 4 Raw material ratio for sintering (%)

[0062]

[0063] 2. The particle size composition of sintered ore is shown in Table 5:

[0064] Table 5 Sinter particle size composition

[0065]

[0066] It can be seen from Table 5 that the traditional sintering method was adopted for the single ore of Kulan powder, and the relevant experimental data could not be obtained because the sintering ...

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Abstract

The invention discloses a low-carbon, environment-friendly and high-efficiency sintering method for sintering fuel by graded addition, which includes batching and mixing, granulation, cloth sintering, crushing and cooling, and granulation screening. Before entering the fuel bin, it is divided into two parts: >3mm particle size fuel and <3mm particle size fuel. Put the <3mm particle size fuel into the fuel bin in the sintering batching room, mix it with other sintering materials, and add water to moisten it. Finally, the material M1 is obtained, and the fuel with a grain size of >3mm is directly sent into the granulator by means of external distribution, and the material M1 is mixed and granulated to obtain the mixed material. The invention overcomes the problems of severe crushing and low utilization rate of fine-grained fuel in the open-circuit crushing process of sintered anthracite, improves fuel utilization and production efficiency, reduces solid fuel unit consumption, and reduces harmful gas emissions.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a low-carbon, environment-friendly and high-efficiency sintering method in which sintering fuel is added in stages. Background technique [0002] In iron and steel complexes, the sintering process is to roast iron-containing fine ore and concentrate at high temperature into raw materials with physical and chemical properties suitable for blast furnace smelting. It is an indispensable process for the current long-process iron and steel smelting. Usually, the crushing process of sintered fuel is an open-circuit process, which cannot effectively control the particle size composition of sintered fuel, resulting in excessive crushing of the fuel, which has an adverse effect on the output, strength and particle size composition of sintered ore, resulting in high fuel consumption and increased pressure on environmental protection. [0003] The patent "a method of adding fuel for iron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16C22B1/24C22B1/26C21B5/00
CPCC22B1/16C22B1/24C22B1/26C21B5/008
Inventor 李吉能罗英杰
Owner WUKUN STEEL
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