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A method for discharging harmful elements of blast furnace and cleaning blast furnace type

A technology of harmful elements and blast furnace type, which is applied in blast furnace smelting treatment, discharges harmful elements of blast furnace and cleans up blast furnace furnace type, can solve the problems of not being very good and limited blast furnace operation system, so as to improve safety and reduce labor intensity. , the effect of improving the working environment

Active Publication Date: 2020-05-05
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

But at present, blast furnaces, especially large-scale blast furnaces, do not have a good way to discharge alkali metal K, Na and light metal Zn. It is very limited by adjusting the operating system of the blast furnace. Therefore, it is necessary to adopt an effective method to discharge alkali metal K, Na and and light metal Zn

Method used

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  • A method for discharging harmful elements of blast furnace and cleaning blast furnace type
  • A method for discharging harmful elements of blast furnace and cleaning blast furnace type

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] A certain 2200m 3 The blast furnace has been put into operation for 3 years after its renovation and maintenance. Alkali metal K, Na and light metal Zn are continuously circulating and accumulating in the blast furnace, occupying the effective space of the blast furnace, diluting the effective concentration of gas, and catalyzing the coke gasification reaction. And cause nodules on the blast furnace body, make the blast furnace shape irregular, affect the stability of the blast furnace and energy saving and consumption reduction. The stable operation of the blast furnace was greatly damaged, the intensity of manual labor increased sharply, the level of energy consumption rose sharply, and the abnormality of the blast furnace was caused. Therefore, "a method of discharging harmful elements from the blast furnace and cleaning the blast furnace type" was adopted.

[0097] Step 1: Prepare for empty material

[0098] 1) Appropriately reduce the amount of coke in the center ...

Embodiment 2

[0121] A certain 3200m 3 The blast furnace has been put into operation for 4 years after the renovation and maintenance. The alkali metal K, Na and light metal Zn are continuously circulating and accumulating in the blast furnace, occupying the effective space of the blast furnace, diluting the effective concentration of the gas, and catalyzing the coke gasification reaction. And cause nodules on the blast furnace body, make the blast furnace shape irregular, affect the stability of the blast furnace and energy saving and consumption reduction. The stable operation of the blast furnace was greatly damaged, the intensity of manual labor increased sharply, the level of energy consumption rose sharply, and the abnormality of the blast furnace was caused. Therefore, "a method of discharging harmful elements from the blast furnace and cleaning the type of the blast furnace" was adopted.

[0122] Step 1: Prepare for empty material

[0123] 1) Appropriately reduce the amount of coke...

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Abstract

The invention discloses a method for discharging blast furnace harmful elements and cleaning the blast furnace profile. The method comprises the steps that firstly, a blast furnace is subjected to material face lowering, most of space above a blast furnace bosh is slowly emptied, a certain top temperature is maintained, the enough gas flow speed is guaranteed, and the harmful elements are discharged through gas flow; and secondly, after blast furnace material face lowering, damping down is conducted for 2-5 h, and the temperature of a furnace body is reduced. Enough coke is arranged to recoverproduction, gradual material face driving is conducted, on one hand, the blast furnace space is fully filled with burden, and the temperature of the furnace body is gradually increased from bottom totop. Through the furnace body cold shrinkage and heat expansion method, iron slag foreign matter adhering to the blast furnace body and enriched dross are removed, and flatness and uniformity of thefurnace profile are achieved. According to the method, alkali metals including K and Na and the light metal Zn constantly and circularly accumulated in the blast furnace are effectively removed, and the dross on the blast furnace body is cleaned away. The productivity of the blast furnace is increased again, energy consumption is reduced, the labor intensity of manual work is greatly relieved, theoperation environment is improved, and the safety guarantee is improved.

Description

technical field [0001] The invention relates to a blast furnace smelting treatment method, in particular to a method for discharging harmful elements of the blast furnace and cleaning the blast furnace type, and belongs to the technical field of blast furnace smelting. Background technique [0002] The common feature of alkali metal K, Na and light metal Zn is low density, which continuously circulates and accumulates in the blast furnace, occupies the effective space of the blast furnace, dilutes the effective concentration of gas, and catalyzes the coke gasification reaction. And lead to the thickening of the blast furnace body, which affects the stability of the blast furnace and energy saving and consumption reduction. If it is not discharged or cleaned in time, it will have an obvious adverse effect on the life and stable operation of the blast furnace. [0003] The light metal Zn is taken as an example to introduce the behavior principle of light metal Zn in blast fur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/00
Inventor 尹腾
Owner 武汉钢铁有限公司
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