Method for improving reduction of agglomerate and reducing fuel consumption

A technology for sintering and fuel consumption, applied in the fields of improving the reducibility of sintering ore and reducing solid fuel consumption, can solve the problems of not being able to reduce the reducibility of sintering ore and reducing productivity at the same time, so as to reduce solid fuel consumption and environmental pollution, reduce content, The effect of increasing calcium ferrite content

Active Publication Date: 2019-01-01
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0008] Although the above-mentioned methods in the prior art have played a role in improving sinter reducibility or reducing sinter solid fuel consumption to a certain extent, some methods have certain limitations, and some methods cannot simultaneously reduce sinter reducibility, productivity and reduce solid fuel consumption. Fuel consumption and other issues

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  • Method for improving reduction of agglomerate and reducing fuel consumption
  • Method for improving reduction of agglomerate and reducing fuel consumption
  • Method for improving reduction of agglomerate and reducing fuel consumption

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Embodiment Construction

[0034] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Reference figure 1 The existing process and figure 2 The biggest difference between the process of the present invention and the two is the method of the present invention for the treatment of solid fuel and the mastery of the timing of mixing and adding the treated substances.

[0036] The method for improving the reducibility of sintered ore and reducing solid fuel consumption provided by the present invention mainly lies in improving the solid fuel combustion behavior and the distribution in the sintered material layer by optimizing the solid fuel particle size composition and pelletizing behavior before pelletizing. The theoretical basis of its innovation is: through the study of solid fuel granulation, distribution and combustion behavior in the sintering process, it is found that: ①, solid fuel has good granulation perform...

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Abstract

The invention discloses a method for improving reduction of agglomerate and reducing fuel consumption. The method comprises the following steps: 1. pretreatment: granulating the solid fuel for sintering, and respectively controlling the mass percentage and the average granularity of each of the particles of greater than 3 mm, 1 to 3 mm, 0.5 to 1 mm, and less than 0.5 mm; and 2, granulation: blending iron ore, a flux, returning ore, iron-containing dust and a solid fuel according to the set agglomerate composition and quality index, and then performing primary and secondary mixed granulation in order, adding the solid fuel during primary or secondary mixed granulation of the other sintering raw materials to adjust the primary and secondary mixed granulation time T1 and T2 of the solid fuel, controlling the average particle size increase value of the solid fuel during the whole granulation process to 0.04 to 0.43 mm, wherein the average particle size after granulation is 1.4 to 2.0 mm;and 3. burden distribution and sintering.

Description

Technical field [0001] The invention relates to a sintering process in the metallurgical industry, in particular to a method for improving the reducibility of sintered ore and reducing solid fuel consumption. Background technique [0002] As pollution and carbon emission reduction policies become more stringent, reducing ironmaking energy consumption to achieve low-consumption and environmentally friendly production has become the main development direction of future ironmaking technology. The realization of low-consumption environmental protection not only requires efforts from end-point management, but also needs to study how to reduce fuel consumption in the production process and reduce pollutant emissions from the source. Improving the reducibility of sinter is one of the important technologies to achieve low carbon emissions. According to production statistics, for every 10% improvement in the reducibility of ore, the blast furnace coke ratio can be reduced by 8-9%. At the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/245
CPCC22B1/16C22B1/245
Inventor 熊林毛晓明李建王跃飞赵利明周茂军
Owner BAOSHAN IRON & STEEL CO LTD
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