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Low-carbon environment-friendly high-efficiency sintering method for grading and adding sintered fuels

A low-carbon, environmentally friendly, sintering method 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 reducing production costs.

Active Publication Date: 2020-05-05
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • Low-carbon environment-friendly high-efficiency sintering method for grading and adding sintered fuels
  • Low-carbon environment-friendly high-efficiency sintering method for grading and adding sintered fuels
  • Low-carbon environment-friendly high-efficiency sintering method for grading and adding sintered fuels

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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 high-efficiency sintering method for grading and adding sintered fuels. The method comprises the steps of proportioning and mixing, granulating operation, distributing and sintering, crushing and cooling, and granulating and screening, and is characterized in that before the proportioning and mixing are carried out, the fuels are divided into two parts of large than 3-mm granular fuels and smaller than 3-mm granular fuels before entering a fuel bin, the smaller than 3-mm granular fuels are filled into the fuel bin in a sintering proportioning chamber and uniformly mixed with other sintered materials, water is added for wetting to obtain a material M1, and the larger than 3-mm granular fuels are directly fed into a granulator in an external mixing mode to carry out mixture granulation operation with the material M1 to obtain a mixture. The method solves the problems of serious crushing and low utilization rate of fine fuels in anopen-circuit crushing processing technology for sintering anthracite, improves the fuel utilization and production efficiency, reduces the unit consumption of solid fuels and reduces the discharge amount of harmful gas.

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] Application No. 200910136016.4 patent "a met...

Claims

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Application Information

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Patent Type & Authority Applications(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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