Design Of The Spray Cooling Water Control System For The400mm Thick Slab During Continuous Casting Process

Continuous casting machine secondary cooling the quality of casting blank, secondary cooling process of continuous casting machine is very important for the quality of casting blank. A disappointed secondary cooling will result in various kinds of quality defect for casting blank. Practice has proved that water adjust on static control methods, with the casting speed of lifting and lifting of water could cause volatility surface temperature of continuous casting billet, slab led to defects. Past as the first Shou Qin casting metal casting workers is very high, plus the first Shou Qin dynasty metal slab product mostly mild steel and low alloy steel, and market conditions are good, not a strict product quality requirements. As market large environment of effect, first Shou Qin metal limited products structure adjustment pace of accelerated, casting high additional products, and improve casting quality and the improve cast machine job rate has become imminent of problem has, and even cast â…¡ times cooling control is even cast core technology, â…¡times cooling control is reasonable relates to new products of development can success, therefore very has necessary do dynamic â…¡ times cooling distribution water control system of research. This article to the first Shou Qin3#400mm plate blank continuous casting machine for the research and development base, to study the dynamic water distribution method,, on the slab temperature online monitoring and control software and successfully applied to1#in the production of continuous casting machine.First, applying the basic knowledge of heat transfer mathematical and the analyses of heat transfer of casting blank, considering the relative factors which can affect the solidification of the casting blank, the mathematical model of heat transfer of casting blank solidification.And install the slab temperature real-time measurement system, infrared temperature sensors, slab model to actual temperature and set temperature contrast, finally by the PID control model control of secondary cooling water flow regulating valve. Pour water on the surface of the slab is accurate, ultimately, slab reasonably control the temperature. Last hardware modification of the entire secondary cooling system, and communication program of the preparation, PLC program modification and improvement and development of man-machine interface, and so on. Through the simulation, this system can inhibit the coagulation control the negative effect on system.By running the dynamic water distribution system, the first Shou Qin1#in continuous casting of slab quality has greatly improved, not only improving the quality of the original product of low carbon steel, carbon steel casting is still can be tasks, and product quality has increased significantly, Peel, cutting corners rates significantly reduced, headed by Shou Qin contributed greatly to the company revenue.