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Blast furnace coal injection ratio adjusting method and system

A technology of blast furnace coal injection and adjustment method, which is applied in the field of blast furnace smelting and can solve the problems of inaccurate coal injection ratio and the like

Active Publication Date: 2018-07-10
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention solves the technical problem of inaccurate coal injection ratio in blast furnace smelting in the prior art by providing a method and system for adjusting the blast furnace coal injection ratio

Method used

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  • Blast furnace coal injection ratio adjusting method and system
  • Blast furnace coal injection ratio adjusting method and system
  • Blast furnace coal injection ratio adjusting method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0117] Embodiment 1: Determine the current coal injection ratio increase corresponding to the potential economic value of the pulverized coal injection based on the first preset linear relationship, wherein the first preset linear relationship is the coal injection ratio increase The amount increases linearly with the increase of the potential economic value; with the increase amount of the current secondary coal injection ratio, the coal injection ratio for the current secondary blast furnace smelting is increased.

Embodiment approach 2

[0118] Embodiment 2: The industrial computer can adjust the coal injection ratio for the current secondary blast furnace smelting at least once until it reaches the preset value of the coal injection ratio.

[0119] Embodiment 3: Calculate the first economic difference between the potential economic value of the pulverized coal injection and the first preset economic threshold; based on the coal injection ratio increase corresponding to the first difference, for the current Sub-blast furnace smelting is carried out to increase the coal injection ratio.

[0120] Specifically, there are multiple height adjustment difference value ranges, and each height adjustment difference value range is in one-to-one correspondence with the coal injection ratio increase, and the first economic difference is determined according to the height adjustment difference value range where the first economic difference value is located. The coal injection ratio corresponding to the value is increased,...

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Abstract

The invention discloses a blast furnace coal injection ratio adjusting method and system. The blast furnace coal injection ratio adjusting method comprises the steps of determining the replacement ratio of injected pulverized coal according to the calorific value of the injected pulverized coal in front of a blast furnace air outlet and the calorific value of coke in front of the blast furnace airoutlet; determining the potential economic value of the injected pulverized coal according to the water removed price of the injected pulverized coal, the purchase price of the coke and the replacement ratio of the injected pulverized coal; raising the coal injection ratio of current blast furnace smelting if the potential economic value of the injected pulverized coal is greater than a first preset economic threshold value; and lowering the coal injection ratio of current blast furnace smelting if the potential economic value of the injected pulverized coal is less than a second preset economic threshold value. Through the blast furnace coal injection ratio adjusting method, the more accurate pulverized coal injection quantity can be provided for blast furnace smelting.

Description

technical field [0001] The invention relates to the field of blast furnace smelting, in particular to a method and system for adjusting the coal injection ratio of the blast furnace. Background technique [0002] At present, the molten iron production method in iron and steel plants around the world is mainly the blast furnace ironmaking method. In addition to the iron-containing raw materials, the molten iron produced by the blast furnace method is coke. In addition to the increasingly scarce resources, the production of coke is the great harm to the environment caused by the coking process. . Therefore, reducing the consumption of coke per ton of iron is the task of all iron smelters at home and abroad. For half a century, great achievements have been made in replacing part of coke with injection fuel. my country has long been dominated by pulverized coal injection. However, there are many types of pulverized coal for injection, and the chemical composition, calorific val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 张勇魏丽艳贾国利张海滨赵满祥张殿伟张雪松周继良
Owner SHOUGANG CORPORATION
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