Steel ladle exchange models during steelmaking and continuous casting process

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Bang-fu Huang , Nai-yuan Tian , Zhe Shi , Zhi-wei Ma
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引用次数: 7

Abstract

The models and influencing factors of steel ladles exchange during the steelmaking and continuous casting process of H steel plant were investigated. Based on analysis of the operation process and turnover time of steel ladles, relationship models for the turnover number, turnover rate, continuous casting number, number of ladles with additional turnover, and number of ladles without additional turnover were built. The turnover rules of steel ladles for one basic oxygen furnace (BOF) matching one continuous caster (CC) and two BOFs matching two CCs modes were simulated by using a Gantt chart. The models of steel ladle exchange were proposed for casting of a single CC and overlapping casting of two CCs. By analyzing the influencing factors, the following conclusions were drawn. The exchange ladle should not have the task of transporting liquid steel in the CC that stops casting earlier. The end time of the empty ladle in the CC that stops casting earlier should be earlier than the start time of the full ladle in the CC that stops casting later. After evaluating the factors influencing the start casting time, turnover cycle, casting time, continuous casting number, and overlapping time, a prioritization scheme of steel ladle exchange was proposed based on the steel grade. First, the turnover cycle and single heat casting time were determined; based on these, a reasonable ladle turnover number was calculated. Second, the turnover number and continuous casting number were optimized for maximizing the number of ladles without additional turnover. Lastly, to reduce the casting number during the overlapping time to be lower than the turnover number, the overlapping time was shortened.

炼钢和连铸过程中钢包交换模型
研究了H钢厂炼钢连铸过程钢包交换的模型及影响因素。在分析钢包操作过程和周转期的基础上,建立了钢包周转量、周转率、连铸数量、有附加周转量和无附加周转量的关系模型。用甘特图模拟了一台碱性氧炉(BOF)与一台连铸机(CC)匹配以及两台转炉(BOF)与两种连铸机(CC)匹配的钢包周转规律。提出了单连铸和双连铸的钢包交换模型。通过对影响因素的分析,得出以下结论:交换钢包不应该有在提前停止铸造的连铸机中输送钢液的任务。停止浇注较早的CC中空钢包的结束时间应该早于停止浇注较晚的CC中满钢包的开始时间。通过对影响连铸时间、周转周期、连铸时间、连铸次数、重叠时间等因素的评价,提出了基于钢种的钢包交换优先方案。首先,确定了周转率和单次热铸造时间;在此基础上,计算出合理的钢包周转率。其次,在不增加钢包周转量的情况下,对钢包周转量和连铸次数进行了优化。最后,为了使重叠时间内的铸件数量低于周转数量,缩短重叠时间。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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