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Using method of coke with different initial reaction temperatures in blast furnace

A technology of reaction temperature and coke, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of increasing ironmaking costs, waste of resources, and rising coal blending costs, improving gas flow distribution, ensuring stable and forward running, and reducing furnace costs. the effect of fluctuations

Active Publication Date: 2019-05-03
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To produce coke with high initial reaction temperature, under the premise of ensuring other coke indicators, it is necessary to use a large amount of high-quality coking coal, which will lead to an increase in the cost of coal blending
Therefore, high-quality high-initial reaction temperature coke is limited. In order to ensure the production of large blast furnaces, ironmaking plants give priority to using it in large blast furnaces, which inevitably leads to relatively poor economic indicators for other blast furnaces.
Since this method of use does not effectively utilize the skeleton effect of high initial reaction temperature coke, it will not only lead to waste of resources, but also affect the production of other blast furnaces and increase the cost of ironmaking

Method used

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  • Using method of coke with different initial reaction temperatures in blast furnace
  • Using method of coke with different initial reaction temperatures in blast furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0059] at 3200m 3 Taking the first-class blast furnace as an example (all the second-class cokes were used before), the cokes with different initial reaction temperatures are classified and used in the blast furnace according to the blast furnace conditions.

[0060] 1. Check the initial reaction temperature of the coke produced in the whole plant, and classify and use it according to the first-class coke: the initial reaction temperature is 970-1010°C; the second-class coke: the initial reaction temperature is 900-970°C.

[0061] 2. First divide the equal area of ​​the material surface into 11 equal parts, and measure the actual cloth angle and material flow angle corresponding to each equal part respectively, from the center to the edge in order of 1 # →11 # bit, set 1 # →3 # Defined as the central part; 4 # →7 # defined as the middle part; 8 # →11 # defined as the edge.

[0062] 3. With its current coke distribution system (The superscript 876541 indicates the rin...

Embodiment 2

[0074] at 4000m 3 Taking a high-grade blast furnace as an example (all the first-class high-quality cokes were used before), the cokes with different initial reaction temperatures are classified and used in the blast furnace according to the blast furnace conditions.

[0075] 1. Check the initial reaction temperature of the coke produced in the whole plant, and classify and use it according to the first-class coke: the initial reaction temperature is 970-1010°C; the second-class coke: the initial reaction temperature is 900-970°C.

[0076] 2. First divide the equal area of ​​the material surface into 11 equal parts, and measure the actual cloth angle and material flow angle corresponding to each equal part respectively, from the center to the edge in order of 1 # →11 # bit, set 1 # →3 # Defined as the central part; 4 # →7 # defined as the middle part; 8 # →11 # borderline

[0077] 3. With its current coke distribution system For example, according to the batch weight...

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Abstract

The invention discloses a using method of a coke with different initial reaction temperatures in a blast furnace.The using method comprises the following steps that 1, a coke initial reaction temperature is detected and obtained; 2, a production coke is divided into a first type of the coke and a second type of the coke; 3, material arrangement system of the blast furnace is remained unchanged, acoke material arrangement corner is divided into three parts: a center part, a middle part, and a edge part; and the second type of the coke is arranged in the middle part, and a mixing coke from thefirst type of the coke and the second type of the coke is arranged in the center part and the edge part; 4, using amount percentage by weight of the fist type of the coke in the mixing coke in the center part and the edge part is determined according to blast furnace capacity; 5, normal material arrangement is conducted; 6, when the blast furnace does not work well, using amount of the first typeof the coke in the center part and the edge part is adjusted; and 7, material arrangement is continued according to the adjusted scheme. The using method effectively solves the using problem of the coke with different initial reaction temperatures in the blast furnace, and provides reference for the application of the cokeinitial reaction temperature index in the blast furnace.

Description

technical field [0001] The invention relates to a method for using coke in a blast furnace ironmaking process, in particular to a method for using coke with different initial reaction temperatures in a blast furnace, and belongs to the technical field of blast furnace ironmaking. Background technique [0002] Coke is one of the most important raw materials for blast furnace ironmaking. It plays a very important role in the stable operation of the blast furnace. It mainly plays the role of skeleton, reducing agent and heat source in the blast furnace. Among them, reducing agent and heat source The role of coal can be replaced by coal injection, but its skeleton role is difficult to replace. As the raw material of blast furnace ironmaking, the quality of coke has a very important influence on blast furnace ironmaking. Therefore, with the increase of blast furnace size and the development of ironmaking technology, blast furnaces continuously put forward higher requirements for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 任玉明鲍俊芳常红兵王元生
Owner 武汉钢铁有限公司
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