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A method for controlling the top temperature of a blast furnace

A temperature control method and blast furnace technology, applied to blast furnaces, blast furnace details, furnaces, etc., can solve problems affecting blast furnace stability, forward movement, increased water consumption, unfavorable blast furnace forward movement, etc., to reduce the amount of water drawn from the top of the furnace, increase The effect of generating electricity and reducing the frequency of fetching water

Active Publication Date: 2019-05-03
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to control the furnace top temperature within the target range, the 6# blast furnace of Taiyuan Iron Works takes about 220 tons of water from the top every day on average, and the monthly average reaches 550 tons per day in severe cases, which is very unfavorable for the smooth operation of the blast furnace.
A large amount of water pumping from the top of the blast furnace will not only increase the water consumption, but also lead to the deterioration of the quality of the furnace charge loaded on the top of the furnace, affecting the stability and smooth operation of the blast furnace

Method used

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  • A method for controlling the top temperature of a blast furnace
  • A method for controlling the top temperature of a blast furnace
  • A method for controlling the top temperature of a blast furnace

Examples

Experimental program
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Embodiment 1

[0020] The water fetching from the top of the 6# blast furnace in Taiyuan Iron Works is controlled by the first-level system of the blast furnace. After the first-level system sets the interlocking conditions, the program will automatically run according to the interlocking conditions, which can realize automatic water fetching. The trial process includes the following steps:

[0021] Step 1: Set the linkage between the furnace top water pumping and charging: when the top temperature is higher than the set starting water pumping temperature of 210°C, the furnace The top does not start water fetching; only when the top temperature is greater than the set start water fetching temperature, and the furnace top is loaded with ore 10 seconds before the next time before the next time the ore is loaded, the furnace top water fetching is started;

[0022] Step 2: The conditions for stopping the top water pumping are: when the top temperature is lower than the set stop water pumping temp...

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Abstract

The invention discloses a blast furnace top temperature control method. When the top temperature is larger than the set water fetching starting temperature, water fetching is not started at the furnace top within the time period of 5 s to 30 s from ore loading on the furnace top to completing of ore loading; furnace top water fetching is started only if the top temperature is larger than the set water fetching starting temperature and only within the time period after ore loading is completed on the furnace top by 5 s to 30 s and before ore loading starting for the next time; and the furnace top water fetching ending conditions include that furnace top water fetching is stopped when the top temperature is smaller than the set water fetching stopping temperature or ore begins to be loaded on the furnace top. After the furnace top water fetching control method is adopted, degradation of water fetching on furnace charge is reduced, stability and progradation conditions of blast furnace conditions are improved, and important economic technical indexes are obviously improved.

Description

technical field [0001] The invention relates to a method for controlling the temperature of the top of a blast furnace, belonging to the field of temperature control of the top of a blast furnace. Background technique [0002] Blast furnace top temperature (referred to as top temperature) is an important indicator of the blast furnace operating status, representing the temperature of the gas produced after complex high-temperature physical and chemical reactions in the blast furnace, which can be detected by the change of the top temperature combined with other airflow The parameters determine the air flow in the blast furnace, and at the same time, it is required to control the furnace top temperature within a certain range to ensure that the furnace top equipment and gas dust removal system equipment will not be damaged by high temperature gas. [0003] Since the opening of the 6# blast furnace in Taiyuan Iron Works, there have been problems of high temperature on the top ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/006
Inventor 李宝峰李壮年阮根基闫魁红宋建忠
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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