截至6月7日上午9时30分,经过炼钢厂职工的共同努力,1号转炉完成了公司下达按计划停炉任务,炉龄创建厂以来6421炉次历史最高纪录。使用氮气溅渣是提高炉龄的有效措施,去年年底由于氮气不足,溅渣率只有70%左右。从今年2月中旬开始,炉衬部分工作层露出永久层砖层,当时炉龄4190炉次,炼钢车间采取留渣操作,缓解轻烧白云石和石灰质量不好给炉衬带来的危害,解决初期造渣不好 As of 9:30 on June 7, after the joint efforts of workers in steel mills, No. 1 converter completed the company ordered to stop the task according to the schedule, the furnace since the founding of the highest furnace 6421 furnace record. The use of nitrogen to splash slag is an effective measure to improve the furnace. At the end of last year, due to the shortage of nitrogen, the rate of splashing was only about 70%. From mid-February of this year, the working lining of the lining showed a permanent layer of brick. At that time, 4190 blast furnaces were used for slag-holding operation in the steelmaking plant to alleviate the hazard brought by the light-burning dolomite and the poor quality of lime to the lining. Slagging is not good