连铸热坯热送直轧自动化核心技术

Core technology of hot delivery and direct rolling automation for hot continuous casting billet

连铸热坯热送直轧技术,是连铸—棒材轧钢生产新工艺。连铸热坯通过辊道热送,不再经过加热炉,直接传送进入轧钢生产线的粗轧机进行轧制。这项技术实现的技术难度很大。在吸收外厂的经验教训基础上,对连铸—热送—轧钢的一系列工序做了大量改进与试验,最终表明:(1)技术获得成功,证明连铸热坯热送直轧技术是可行的;(2)实现了规模生产,已稳定运行并生产了3年多;(3)每年获得经济效益5 000万以上;(4)总结出一套行之有效的生产管理、技术管理的措施。对连铸热坯热送直轧的电气自动化专业部分,在连铸控制、热坯长度切割的控制、热坯称重、收集、剔除和移钢控制、热送辊道与传送控制、热坯传送过程头部加温技术、轧钢粗轧机入口前控制、轧钢生产线主轧区域控制、电气自动化软件核心技术与硬件配置要点等方面,采取的一系列核心技术与关键技术措施,作了技术论述与介绍。

The hot delivery and direct rolling of hot billets during continuous casting is a new technology for the produc- tion of continuous casting - bar steel rolling. Hot continuous casting billet is delivered directly into the rolling production line for rolling through the hot delivery roller without passing through the heating furnace. The technology is not easy for operation. Basing on the experience of foreign factories, we have conducted a series of improvements and experiments on the process of continuous casting - hot delivery - steel rolling, and have achieved below achievements： （1） success in operation of hot delivery and direct rolling of the hot billets during continuous casting proves the feasibility of the tech- nology; （2） a stable mass production of consecutive has realized for three years; （3） an annual benefit of over 50 million has received; （4） a set of practicable and effective management methods of production and technology control has con- cluded. Discussions and introductions have made in the part of electrical automation specialty for hot delivery and direct rolling of the hot billets during continuous casting on a series of core technologies and key technical measures, including the continuous casting control, the hot billets cutting length control, hot billets weighing, collecting, eliminate and moving control, hot delivery roller and delivery control, head heating technology during hot delivery, entrance control before rough mill, the main rolling area control of the production line, the core technology of electrical automation software and the hardware configuration.