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日本钢管公司福山厂5号板坯连铸机于1984年9月投产,该板坯连铸机同第2热轧机组直接连接在一起,以实现直接轧制(HDR)的目的。为实现HDR,该连铸机上设置了各种自动化装置,其操作特点如下:(1)为实现高速连铸(2.0m/min 以上),采取了使用低粘度的结晶器保护渣(添加Li)及使结晶器非正弦振动的措施,并且改善了结晶器铜板的质量等.(2)为得到高温板坯,采用了绝热装置、二次冷却区冷却宽度控制系统。并采用了板坯边缘加热器。(3)为改善板坯表面质量和内部质量,采取了准确控制结晶器液面、设计最佳浸入式水口和气雾冷却等措施。通过采用这些新开发的技术,使HDR 工艺的生产量增加到10万t/月。本文介绍的是为实现HDR 而开发的新装置和操作技术。
The Japanese steel pipe company Fukuyama Plant No. 5 slab caster was put into operation in September 1984 and the slab caster was connected directly with the No. 2 hot rolling mill unit for the purpose of direct rolling (HDR). In order to achieve HDR, the continuous casting machine is equipped with various automatic devices. The operation features are as follows: (1) In order to achieve high-speed continuous casting (2.0m / min or more), a mold powder with low viscosity And the non-sinusoidal vibration of the mold measures, and to improve the quality of copper mold, etc. (2) In order to obtain high temperature slab, the use of adiabatic devices, secondary cooling zone cooling width control system. And the use of slab edge heater. (3) In order to improve the surface quality and internal quality of the slab, the measures of accurately controlling the liquid level of the mold, designing the optimal immersion nozzle and the aerosol cooling are adopted. Through the use of these newly developed technologies, the HDR process throughput has been increased to 100,000 t / month. This article describes new devices and operating techniques developed to achieve HDR.