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总第262期 2017年第10期
河北冶金 HEBEIMETALLURGY
连铸坏直轧技术在棒材生产线的应用
朱绪
（河钢集团宣钢公司一钢轧厂，河北宣化075100）
Total No. 262 2017,Number10
摘要：宣钢公司棒材生产线对热送区域进行了系统改造，新增分钢机、拨钢机、摆动辑道及弧形辊道，将热连铸坏由原来的多支成组摆送在移钢链分钢单送方式，改为红坏单只直接拨钢直送方式。连铸坏切割完后走南线辊道，至完全入炉时间缩短了60s，连铸坏入炉温度由650℃提高至800℃，煤气消耗由 243m/t降为150m/t，比改前低93m/t，年节约煤气效益1200多万元。通过开展连铸直接轧制试验，连铸机拉速为3m/min，连铸坏上冷床，由分钢机拨至北线旋转辊道，快速输送至1#轧机，开轧温度
为900℃。通过对连铸坏热送进行优化，大幅降低了能源消耗，增强了企业市场竞争力。关键词：连铸坏直轧技术；棒材生产线；应用
中图分类号：TG335.6
文献标识码：B
doi:10. 13630/j. cnki. 13 1172.2017. 1013
文章编号：10065008（2017)10005804
APPLICATIONOFDIRECT
ROLLINGTECHNOLOGYOFCONTINUOUS CASTINGBILLETINBARPRODUCTIONLINE
Zhu Xu
(No.1 Steel Rolling Plant, HBIS Group Xuansteel Company, Xuanhua, Hebei, 075100)
Abstract : Reformation was carried out in hot delivery zone of Xuansteel bar line, added with the splitting ma-chine, the pusher, the rocking rou table and the arc shaped roll lable. The hot billets were transferred origi nally in group of multi pieces to the steel chain and then delivered one by one. And now the hot billets would be transferred directly and singly. Then the time shortened nearly 60 seconds from the continuous cast ing billet was cut down to the biuets completely came into the heating furnace, along the southern line. The charging temperature was increased from 650 ℃ to 800 °C. The gas consumption was reduced from 243 m' /t to 150 m/t , which was less than 93 m/t before modification, and the profit was saved more than RMB 12 million each year. Through the continuous casting billet direct rolling test, the casting speed was 3 m/min. The continuous casting billet came to the cold bed and then was pulled to the northern line spinning roller by the splitting machine , and then quickly transferred to 1# rolling mill, and the rolling temperature reached 900 C. By optimizing the heat transfer of the continuous casting billet, the energy consumption is greatly reduced and the market competitiveness of the enterprise is enhanced.
Key Words: continuous casting bittet direct rolling technology; bar production line; application
引言
目前，中国钢铁产能严重过剩，全行业进入边际
利润时代，节能环保成为硬性指标。在新常态下，方坏直接轧制技术可以降低成本、节能减排，具有积极意义。近几年，国内很多企业，尤其是民营企业尝试收稿日期：2017-07-07
作者简介：朱绪（1964－），男，高级工程师，1989年7月毕业于唐山工程技术学院金属压力加工专业，现在河钢集团宣钢公司一钢轧厂从事工艺、技术、质量管理工作，E-mail；xhuxu2005@aliyun.con
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万方数据
连铸坏不用加热炉直接轧制与连铸坏补热轧制工艺，并取得成功。鞍山兴华钢厂通过免加热轧制生产线改造，实现了连铸坏直轧批量化生产，直轧率达到93.2%【1]。陕西钢铁集团有限公司采用高速变频保温输送和低温柔性轧制技术，实现了高强度抗震钢筋无加热弱降温直接轧制技术的产业化应用，直轧率达到95.8%【2]。中天钢铁二轧厂经过免加热直接轧制工艺改造后，在1min内把铸坏从连铸