A method for discharging coke in a blast furnace

A coke and blast furnace technology, applied in the field of blast furnace operation control, can solve problems such as entering the central area of ​​the blast furnace, medium coke entering the tailings, etc.

Active Publication Date: 2022-04-08
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The traditional discharge method is: medium coke and large coke hoppers start and stop discharge synchronously. The defect of this discharge method is that some medium coke will enter the tail and finally enter the central area of ​​the blast furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Take Taigang 6# blast furnace as an example:

[0018] (1) The 6# blast furnace has a total of 7 coke bins, among which the coke bucket (1#) at the near end of the blast furnace stores medium coke (medium coke), and the other coke buckets store large coke (normal coke); each cycle Set 4 kinds of hopper selection methods (1~7# coke hoppers can be selected respectively), the numbers are C1~C4, and 4 coke hoppers are selected for each discharge;

[0019] (2) At the beginning of discharge, the medium coke hopper and the large coke hopper are discharged at the same time. When the coke is weighed to the set coke batch weight ratio, the medium coke hopper stops discharging, and the large coke hopper continues to discharge until it is weighed. Set the coke batch weight;

[0020] (3) When it is required that the medium lump coke accounts for 2.5% of the total coke, choose 1# coke bucket in C1~C4 once; when it requires that the medium lump coke accounts for 5.0% of the total coke...

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PUM

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Abstract

A method for discharging medium coke in a blast furnace, including (1) storing medium coke in the 1# hopper near the blast furnace, and storing large coke in other hoppers; (2) medium coke hopper and large coke hopper at the beginning of discharge At the same time, when the coke is weighed to the set coke batch weight ratio, the medium coke hopper stops discharging, and the large coke hopper continues to discharge until the set coke batch weight is weighed; (3) when the coke is required to account for the total When the amount of coke is less than 10.0%, set the proportion of medium coke to the total coke to 30% to 40%. When the total coke amount is 5.0%, choose 1# hopper for 2 times; (4) When it is required that the medium lump coke accounts for more than 10.0% of the total coke amount, choose 1# hopper for 4 times, and set the ratio to 60%. The invention reduces the entry of medium coke into the center area, which is beneficial to keep the central air flow of the blast furnace unobstructed and activate the furnace hearth.

Description

technical field [0001] The invention belongs to the field of blast furnace operation control. Background technique [0002] In recent years, with the increasingly fierce competition in the iron and steel industry, various iron and steel enterprises have used various methods to reduce the cost of raw materials and fuels. In terms of comprehensive utilization of coke, the method of increasing medium-sized coke has been adopted to reduce costs. If only the medium coke is mixed into the large coke and then loaded into the blast furnace, it will bring some negative effects to the operation of the blast furnace: the medium coke and the large coke are mixed into the blast furnace, and the overall gas permeability of the coke will be changed due to the mixing effect. Poor; large coke and medium coke have a large difference in quality and particle size, and the shape of the material surface formed by different mixing effects is different, which will especially cause unstable airflow ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/007
Inventor 李壮年李宝峰武树永
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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