A method of improving sinter reducibility and reducing fuel consumption

A sinter and fuel consumption technology, applied in the field of improving sinter reducibility and reducing solid fuel consumption, can solve problems such as inability to simultaneously reduce sinter reducibility and lower productivity, and achieve reduction of solid fuel consumption and environmental pollution, lower content, The effect of increasing calcium ferrite content

Active Publication Date: 2020-06-23
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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  • A method of improving sinter reducibility and reducing fuel consumption
  • A method of improving sinter reducibility and reducing fuel consumption
  • A method of improving sinter reducibility 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] refer to figure 1 existing processes and figure 2 The process of the present invention, the biggest difference between the two is that the present invention handles the solid fuel and grasps the timing of mixing and adding the treated matter.

[0036] The method for improving sinter reducibility and reducing solid fuel consumption provided by the present invention mainly lies in improving the solid fuel combustion behavior and distribution in the sinter layer by optimizing the particle size composition and granulation behavior of the solid fuel before granulation. The theoretical basis of its innovation is: Through the research on the granulation, distribution and combustion behavior of solid fuel in the sintering process, it is found that: ① Solid fuel has good granulation performance, and most of the solid fuel grows up ...

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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] With the increasingly stringent pollutant and carbon emission reduction policies, 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 and environmental protection requires not only efforts in terminal treatment, but also research on 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 ore reducibility, the blast furnace coke ratio can be reduced by 8-9%. At t...

Claims

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Application Information

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Patent Type & Authority Patents(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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