Low-cost and high-efficiency converter fettling process

A low-cost, converter technology, applied in the manufacture of converters, etc., to achieve the effects of reduced consumption, improved converter operation rate, and shortened sintering time

Inactive Publication Date: 2017-08-01
TANGSHAN GUOFENG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the above-mentioned problems existing in the existing converter repairing process, and provides a low-cost and high-efficiency converter repairing process that changes the converter repairing method to improve sintering quality and reduce the cost of converter refractories

Method used

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Embodiment Construction

[0023] The present invention is described in detail below in conjunction with embodiment.

[0024] In this embodiment, the large surface repair of an 80-ton converter is taken as an example to illustrate, and the specific operation process is as follows:

[0025] (1) Add magnesia slag-forming materials when the converter is blown for 2 minutes. The magnesia slag-forming materials are magnesium balls and dolomite. Among them, the amount of magnesium balls added is 10kg / t, and the amount of dolomite added is 20kg / t. Do not adjust the cold material, that is, do not add iron-containing slag material 3 minutes before the end point, to prevent slag from being intertwined or slag from being too sticky; in order to ensure that the slag filling is firm and firm, the final slag should have good fluidity and a large amount, so that the steel does not splash Slag, not dumping slag.

[0026] (2) Shake the converter to an inclination angle of 60-70° according to the position of the slag me...

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PUM

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Abstract

The invention relates to a low-cost and high-efficiency converter fettling process, and belongs to a smelting production technology of a converter. The method comprises the following steps: adding a magnesian slagging material when a converter starts for blowing by 2 minutes according to the adding amount of 30 kg/t, and stopping adding iron-containing slag materials 3 minutes before a final blowing point; and wagging the converter till the inclination angle is 60 to 70 degrees according to a slag supplementing large-area part, adding prepared fettling bricks into the converter according to a proportion of 200 to 300 pieces of fettling bricks in 80 tonnage of the converter, rotating the converter along small amplitude when the fettling bricks are added, backwards slowly wagging the converter to enable the fettling bricks to be fully mixed with furnace slag after a waste steel pipe is extracted out of the converter, then wagging the converter till the inclination angle is 85 to 95 degrees, standing for 35 to 45 minutes to enable the viscosity of the furnace slag to be increased, wrapping the fettling bricks, and attaching the fettling bricks to a furnace lining. According to the low-cost and high-efficiency converter fettling process, the after-fettling sintering time is shortened by 20 minutes, and the converter working efficiency is improved; the fettling bricks can prolong the use time by 8 hours, and no phenomenon of falling of the fettling bricks is caused; the use amounts of the fettling bricks, large-area fabrics and gunning mixes is reduced; and safety accidents caused by falling of the fettling bricks are reduced.

Description

technical field [0001] The invention relates to a low-cost and high-efficiency converter repairing process, which belongs to the technical field of converter smelting production. Background technique [0002] In the converter smelting industry, it is very important to optimize the furnace repair process in the converter area, reduce the cost of auxiliary materials for converter repair, prolong the service life of the furnace lining, shorten the maintenance time of the furnace, and improve the utilization rate of the converter. [0003] Taking a 120-ton converter as an example, the existing repair process for the large surface of the converter is as follows: before the converter is shut down, the last furnace is tapped and the furnace is protected by slag splashing. After the slag splashing, all the slag in the furnace is poured into the slag hopper under the furnace . Then add 300-400 repairing bricks into the furnace through the scrap steel hopper. After the repairing bric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36C21C5/44
CPCC21C5/36C21C5/443
Inventor 贾宁张瑞松张云宝张金龙王伟男李朝阳李朝霞马云鹏葛建华李涛耿赛晓杨立争吴明伟乔立岩张利民张丽颖李希胜郑瑞禄张义春
Owner TANGSHAN GUOFENG IRON & STEEL
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