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A method of controlling furnace top temperature

A technology for controlling furnace and charge, applied in the field of blast furnace smelting

Active Publication Date: 2020-06-26
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the blast furnace gas gradually rises from the lower part of the furnace, the heat also moves up. If the rising trend is not controlled, the temperature of the furnace top space can reach above 150°C in a short period of time. Under the above-mentioned gas concentration and furnace temperature, the spraying operation Personnel cannot enter the furnace to work

Method used

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Embodiment Construction

[0027] In order to fully understand the purpose, features and effects of the present invention, the present invention will be described in detail through the following specific embodiments. Process method of the present invention except following content, all the other all adopt the routine method or device of this field. Unless otherwise specified, the following nouns and terms have the meanings commonly understood by those skilled in the art.

[0028] The method for controlling furnace top temperature of the present invention is suitable for furnaces with a capacity greater than 4000m 3 blast furnace.

[0029] Concretely, a kind of method for controlling furnace top temperature provided by the invention comprises the following steps:

[0030] (1) Before the wind is turned off, the material line is lowered, and the material line is controlled to be above 3.5m. After the wind is reduced, the material line is driven to the normal level of the material line. When the wind is t...

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Abstract

The invention belongs to the field of blast furnace smelting, and particularly relates to a method for controlling furnace top temperature. Specifically, the method for controlling the furnace top temperature comprises the following steps that (1) charging line dropping is carried out before damping down and wind reduction, the charging line is controlled above 3.5 m, the charging line is concentrated to a normal charging line level after the wind reduction, the charging line is controlled 1.2-1.5 m during the damping down; (2) after the damping down, the top of a furnace is ignited after gaspurge is qualified; (3) furnace charge is loaded; and (4) cover plane charge is loaded, and the distribution of the cover plane charge in a charge plane is adjusted. According to the method for controlling the furnace top temperature, requirements of gas concentration and the furnace top temperature when blast furnace top equipment is maintained are met by adjusting a load mode of the furnace charge in the damping down process and steps for controlling press charge after the damping down.

Description

technical field [0001] The invention belongs to the field of blast furnace smelting, and in particular relates to a method for controlling the temperature of a furnace top. Background technique [0002] Blast furnace top ring plate refers to welding a series of decouplings on the inner surface of the furnace shell at the top of the blast furnace body, and applying a layer of refractory material between the decouplings. Under normal production conditions, the gas temperature at the top of the blast furnace is usually higher than 150°C, while the maximum working temperature of the top airtight box should be lower than 150°C. The refractory material of the ring plate on the top of the blast furnace can effectively separate the high-temperature gas from the top The airtight box is isolated to ensure the normal operation of the top airtight box. [0003] Since the ring plate of the furnace roof has been working in a high-temperature and high-velocity gas environment for a long t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/006
Inventor 刘文文李夯为赵新民郑伟赵志鸿王志刚王晓冰
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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