A method for rapid water cooling and temperature control of medium and thick plate intermediate billets
A water-cooling and fast technology, applied in the direction of temperature control, etc., can solve the problems that affect the production rhythm and output, can not be controlled by the intermediate billet, and the air cooling time is long, so as to achieve high social and economic benefits, improve production efficiency, and reduce the waiting time. Effect
Active Publication Date: 2016-06-29
NANJING IRON & STEEL CO LTD
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Problems solved by technology
The existing medium-thick plate controlled rolling process mainly adopts the air cooling method for cooling in the controlled cooling stage. When the intermediate billet is thick, the air cooling time is too long. The general cooling time is 7-8 minutes, and the cooling time for thicker billets can reach more than 10 minutes. Minutes, and such a long temperature control time seriously affects the production rhythm and output
The existing cooling control stage is controlled by the finite element method model, which is mainly used to control the cooling after rolling. The cooling mode is laminar cooling, but this model cannot be used for the control of the intermediate billet
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[0015] This embodiment is a method for rapid water cooling and temperature control of a medium and heavy plate intermediate billet: the device involved in the method includes a rolling mill controlled cooling system, and the controlled rolling and controlled cooling system includes a rolling mill primary control system and a mill secondary control system , The rolling mill secondary control system model includes the intermediate billet data model and the laminar cooling model; the intermediate billet data model is to realize the segment detection of the intermediate billet, and each segment of the intermediate billet is controlled during the last bite of the first stage of the control rolling plate. The measured temperature, thickness, speed and target control temperature of the intermediate slab final cooling are sent to the laminar cooling model; the intermediate slab thickness data is set for finite difference calculation in seven layers in the thickness direction. At the sam...
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The invention discloses a method for rapid water-cooling temperature control on an intermediate blank of a medium thick plate. A device involved in the method comprises a controlled rolling and controlled cooling system of a rolling mill. The method is characterized in that in a controlled rolling and controlled cooling process, after first-time rolling is finished, the intermediate blank enters a laminar cooling layer for cooling control; after water cooling is finished, the intermediate blank is conveyed from the laminar cooling layer to a holding area to wait; when the surface temperature and the core temperature of the intermediate blank are restored to be uniform, the intermediate blank enters a second phase for rolling. Compared with an air-cooling temperature control process, a water-cooling temperature control process has the advantages that the holding time can be substantially shortened, according to experiments, water-cooling temperature control takes only 2-3 minutes, air-cooling temperature control takes 7-8 minutes, and the cooling time can exceed 10 minutes when thicker plates are cooled. By the aid of the method, the production efficiency is greatly improved, and the method has the very high social and economic benefit.
Description
Technical field [0001] The invention relates to the application of a mathematical model to a process control computer for a hot-rolled plate and strip mill, and in particular to a method for rapid water cooling and temperature control of a medium and thick plate intermediate billet. Background technique [0002] In order to adapt to the fierce competition in the market, developing new products and improving product quality is a necessary way for many medium and heavy plate manufacturers to improve their competitiveness. The controlled rolling and cooling process in the production process is the key process, which directly affects the production cost. , Efficiency and quality. The technical difficulty in the controlled rolling and controlled cooling process is the controlled cooling technology. The existing medium and heavy plate controlled rolling process mainly adopts air cooling in the controlled cooling stage. When the intermediate billet is thick, the air cooling time is too...
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IPC IPC(8): B21B37/74
Inventor 朱鹏举
Owner NANJING IRON & STEEL CO LTD