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Method for avoiding blast-furnace gunning rebound materials mixing with cokes in hearth

A technology of blast furnace and coke, which is applied in the field of avoiding the mixing of blast furnace gunning rebound material and coke in the hearth, which can solve the problems of difficult cleaning, prolonging the blast furnace shutdown time, and taking a long time

Active Publication Date: 2010-06-23
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to clean up because the rebound material is mixed with the coke in the hearth
At the same time, it takes a lot of manpower to clean the hearth in the harsh environment, and it takes a long time, resulting in prolonging the shutdown time of the blast furnace

Method used

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  • Method for avoiding blast-furnace gunning rebound materials mixing with cokes in hearth
  • Method for avoiding blast-furnace gunning rebound materials mixing with cokes in hearth

Examples

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Embodiment Construction

[0010] 1. The material surface of the blast furnace is lowered to the tuyere belt. After the wind is stopped, 5 tons of coke is covered from the top of the blast furnace to the material surface (it can be increased or decreased according to the furnace capacity and the shape of the specific material surface), and then the staff enters the furnace to bring the material to the tuyere. Fill the surface depressions and flatten the top of the material surface as much as possible, and then spray a layer of covering agent on the material surface to keep it warm;

[0011] 2. Spread the iron plate on the covering agent and fix it. Specific method: the thickness of the iron plate is 0.5mm-0.8mm, it is rectangular, and the area of ​​each piece is 2-3m 2 , Drill a number of round holes with a diameter of 2mm-3mm at the edge of the iron plate. Then penetrate the round holes of the adjacent iron plates into the iron wires and fix them so that there is no gap between the adjacent iron plate...

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Abstract

The invention discloses a method for avoiding blast-furnace gunning rebound materials mixing with cokes in a hearth, and belongs to the technical field of gunning a furnace wall by descending burden surface of a blast furnace and rapid recovery after maintenance. The method comprises the following steps of: descending the burden surface of the blast furnace to a tuyere zone; capping 4.5-5.5 tons of cokes to the burden surface from a furnace top of the blast furnace; enabling an operator to enter the furnace to leveling up sunk parts of the burden surface of the tuyere zone; stacking the burden surface to a tip shape and leveling up the burden surface; spraying a covering agent to keep the temperature; paving and fixing iron plates on the covering agent; inserting iron wires into round holes of the adjacent iron plates to fix to ensure that a gap is not reserved between the adjacent iron plates; placing a pre-welded angle iron stand between adjacent tuyere zones, and filling the space between the adjacent tuyere zones by the angle iron stand without gap; and fixing the iron plates on the upper side and the lateral sides of the angle iron stand to ensure that the rebound materials fall on the iron plates arranged in front of the tuyere zones. The method has the advantages of maintaining the cokes in the hearth to be clean to the maximum extent, improving the efficiency of clearing the rebound materials by the operator and creating a condition for rapid air recovery.

Description

technical field [0001] The invention belongs to the technical field of gunning the furnace wall on the lowering surface of the blast furnace and rapid recovery after maintenance, and in particular provides a method for avoiding the mixing of the blast furnace gunning rebound material and the coke in the hearth, which can keep the coke in the hearth clean to the greatest extent. Improve the efficiency of the staff to remove the rebound material and create conditions for rapid return air. Background technique [0002] In the past, when the blast furnace lowered the material surface and gunned the furnace wall, after the material surface dropped to the tuyeres and stopped the wind, a layer of covering agent was sprayed on the material surface to keep warm, and then the furnace wall was gunned. Depending on the volume of the blast furnace, 200-800t of refractory material is sprayed each time, and the rebound material composition is mainly Al203. During the gunning process, abou...

Claims

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Application Information

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IPC IPC(8): C21B7/00
Inventor 王义冬丁汝才王效东王志刚
Owner SHOUGANG CORPORATION
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