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Method for adjusting fuel rate during furnace condition resumption process according to gas utilization rate

A recovery process and utilization rate technology, applied to the improvement of process efficiency, furnaces, blast furnaces, etc., can solve problems such as furnace cooling, long time consumption, and large economic losses, and achieve the effect of smooth furnace conditions

Inactive Publication Date: 2017-02-22
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the blast furnace recovers from abnormal furnace conditions, due to various reasons such as material collapse, pipelines and operating systems, the utilization rate of gas and the utilization of physical heat of gas will be reduced to varying degrees.
In this case, if the fuel ratio (coke ratio + coal ratio) cannot be replenished in time to raise the heat, there will be a furnace cooling accident due to the loss of gas heat, which is difficult to deal with, takes a long time, and causes huge economic losses

Method used

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Embodiment Construction

[0007] A method for adjusting the fuel ratio according to the gas utilization rate during the recovery process of the furnace condition. Every 1% change in the gas utilization rate affects the fuel ratio as follows:

[0008] 1) When the gas utilization rate is 30%-35%, the fuel ratio is affected by 10-12kg / t, and the fuel ratio is controlled to be 650-700 kg / t;

[0009] 2) When the gas utilization rate is 35%-43%, the fuel ratio is affected by 8-10kg / t, and the fuel ratio is controlled to be 600-650 kg / t;

[0010] 3) When the gas utilization rate is 43%-46%, the fuel ratio is affected by 6-8kg / t, and the fuel ratio is controlled to be 560-600 kg / t;

[0011] 4) When the gas utilization rate is 46%-48%, the fuel ratio is affected by 5-7kg / t, and the fuel ratio is controlled to be 530-560 kg / t;

[0012] 5) When the gas utilization rate is 48%-50%, the fuel ratio is affected by 4-6kg / t, and the fuel ratio is controlled to be 500-520 kg / t.

[0013] Based on this, to guide the rec...

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Abstract

The invention discloses a method for adjusting the fuel rate during the furnace condition resumption process according to the gas utilization rate, and belongs to the technical field of blast furnace ironmaking. The method is characterized in that when the gas utilization rate is 30% to 35%, the fuel rate is controlled to be 650 to 700 kg / t; when the gas utilization rate is 35% to 43%, the fuel rate is controlled to be 600 to 650 kg / t; when the gas utilization rate is 43% to 46%, the fuel rate is controlled to be 560 to 600 kg / t; when the gas utilization rate is 46% to 48%, the fuel rate is controlled to be 530 to 560 kg / t; and when the gas utilization rate is 48% to 50%, the fuel rate is controlled to be 500 to 520 kg / t. According to the method, the control for heat and raw iron silicide content during the furnace condition resumption process can be well achieved, production practice operation basis is provided for a blast furnace to achieve smooth air feeding and coke load increase, and quick and smooth resumption of the furnace condition is achieved.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a method for adjusting the fuel ratio according to the gas utilization rate during the recovery process of the furnace condition. Background technique [0002] Under the current production monitoring and technical level conditions of blast furnace smelting production, it has not been possible to directly give the accurate positioning of the reasonable fuel ratio under different gas utilization ratios in the blast furnace to ensure the need to maintain the production heat of the blast furnace. This is a test of experience and technology for blast furnace operators. There is a need for a technology that can clearly point out the difference in gas utilization rate during the recovery process of the blast furnace, especially when the gas utilization rate is more than 10% lower than the normal value, to establish the fuel ratio required for blast furnace o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/06
CPCC21B5/006C21B5/06Y02P10/25
Inventor 唐顺兵李夯为陈树文巩黎伟李宝峰张智
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD