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Method for preventing gunning rebound material from agglomeration and rapidly restoring furnace conditions

A technology for rapid recovery and furnace condition, applied in the direction of furnace, blast furnace, blast furnace details, etc., to achieve the effect of rapid recovery of blast furnace production and strong air permeability

Active Publication Date: 2013-05-15
SHOUGANG SHUICHENG IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the deficiencies existing in the existing treatment methods, and provides a method for preventing the agglomeration of rebound materials without affecting the construction period and quality, and is beneficial to the resumption of production of the blast furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: The effective furnace capacity of the second blast furnace in Shuigang Iron Works is 1200m 3 , 16 tuyere, bell-shaped furnace top. In 2008, due to the impact of the financial crisis, the production was reduced and the furnace was stopped on October 28, 2008. This time the furnace was stopped for a long time, and the damaged parts of the blast furnace wall were repaired during the shutdown. Spraying, after using this special technology in the spraying process, the spraying construction was smooth, and the circular spraying was completed on time and according to the quality. The daily output of the blast furnace reached 2140t, the ore batch was 23.0t / batch, the load was 3.723t / t, and the coke ratio was 463kg / tFe.

Embodiment 2

[0012] Example 2: The effective furnace capacity of the second blast furnace in Shuigang Iron Works is 1200m 3 , 16 tuyere, bell-shaped furnace roof, and the furnace was opened on February 3, 2009. With the improvement of blast furnace strengthening level, the bell was blown out in March, and the blast furnace top pressure was reduced to 0.080MPa. In addition, the blast furnace was sprayed with paint It has reached the one-year life cycle, so on August 25, 2009, the material surface was sprayed and the furnace top clock was replaced. After using this special technology in the spraying process, the spraying construction was smooth, and the circular spraying was completed on time and according to the quality. The effect is ideal. On September 2, the blast furnace was blocked and 10 tuyere air supply was restored. It lasted 54 hours for all tuyere to work. On the 4th, the daily output of the blast furnace reached 2350t, the load was increased to 4.0t / t, and the coke ratio was 380k...

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Abstract

The invention discloses a method for preventing gunning rebound material from agglomeration and rapidly restoring furnace conditions. The technical scheme provided in method comprises the following steps: (1) preparation of an iron sheet barrel: calculating the possible thickness of a rebound material stacked in a charge level according to a blast furnace gunning amount, an approximate proportionof the rebound material and a blast furnace charge level area, increasing by 5cm as the diameter of the iron sheet barrel, wherein the length of the iron sheet barrel is unlimited and is subjected toconvenience for transportation and manufacturing, and the number of the iron sheet barrels can cover more than 1 / 3 of the charge level area, preferably; and (2) putting operation: lowering the chargelevel of a blast furnace to a predetermined position, putting the iron sheet barrel to carry out spray-lining, wherein a putting point is mainly based on the fall point of the rebound material and isalso based on other regions, and the putting time starts from the opening of a manhole of a furnace roof after damping down until a gunning machine enters the blast furnace. The equipment used in themethod is simple to manufacture and convenient and rapid to operate, has wide applicability, and can be popularized in any blast furnace gunning construction.

Description

technical field [0001] The invention relates to the construction and repair of furnace lining, in particular to a method for reducing the negative effect of blast furnace gunning and lining. Background technique [0002] In the middle and late stage of blast furnace production, the refractory materials above the bollard are thinned or even fallen off due to impact, friction, high temperature, chemical erosion, etc., resulting in increased energy consumption, reduced output, poor stability, etc. Equipment and personal safety incidents. In order to eliminate this influencing factor, the common practice is to reduce the blast furnace charge surface and use the gunning method to carry out manual gunning and lining. [0003] During the gunning process, a large amount of refractory materials will not be able to adhere to the furnace wall, and will directly rebound and fall into the furnace material surface to form a hard shell. If the cleaning is not carried out, the permeabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/00C21B7/06
Inventor 龙明华
Owner SHOUGANG SHUICHENG IRON & STEEL GRP