Maintenance method for converter lining in later stage of furnace age

Abstract

The invention discloses a maintenance method for a converter lining in the later stage of furnace age. The maintainance method comprises the following steps that 2-4 tons of furnace repairing material is poured into a converter, and a deslagging surface or a tapping surface is covered with the furnace repairing material by observing and rocking the converter; sintering of the furnace repairing material is finished after 10-15 min, the converter is rocked to a spraying repairing angle, the two sides of a trunnion of the converter are uniformly subjected to spraying repairing for the first time by using a spraying repairing vehicle, and 1 ton of spraying repairing material is subjected to spraying repairing in 5-8 minutes; after the first-time uniform spraying repairing is finished, manual feeding material is adopted for throwing repairing, special point maintenance is conducted on other weak parts in the converter lining, and 0.3-0.5 ton of manual feeding material is subjected to throwing repairing in 3-5 minutes; at 10 minutes after the first time uniform spraying repairing is completed, uniform spraying repairing is carried out for the second time, and 1 ton of spraying repairing material is subjected to spraying repairing in 5-8 minutes; after the second time uniform spraying repairing is finished, if the final purpose of spraying repairing is not achieved according to the spraying repairing result, manual feeding material is subjected to throwing repairing for the second time after furnace repairing is finished, the converter is rocked for adding steel scrap and adding iron; maintenance is carried out in a mode of using the furnace repairing materials, spraying repairing of the spraying repairing vehicle and the manual feeding material, point and face maintenance is carried out on the converter lining, the furnace condition is improved, and the service life of the converter is prolonged.

Description

Technical field [0001] The present invention belongs to the field of converter maintenance technology, and specifically, the maintenance method of a furnace age converter furnace lining is specifically involved. Background technique [0002] The converter furnace lining is mainly made of magnesium refractory material, consisting of a heat insulating layer, a permanent layer, and a working layer. In the process of blowing, the converter performs extremely complex physical chemical reactions, mechanical movements, and high temperature effects, under high temperature and harsh conditions, iron and scraps, chemical erosion of furnace lining and The temperature difference change in the furnace is damaged during the stop and out steel processes, so it takes a lot of time for maintenance. Reduce the damage progress of the furnace lining, improve the service life of the converter lining, and it is important for the safety of the converter safety and increased production. [0003] The con...

AI Technical Summary

Problems solved by technology

For converters at the later stage of furnace age, only using slag splashing to protect the furnace, repairing the furnace with iron blocks and repairing the furnace can no longer meet the requirements for lining maintenance