Application of Level 2 Distribution of Spraying Water in Continuous Casting

The technology of secondary cooling is extremely important for output of the casting machine and quality of the strand.Until now the newest technology of secondary cooling is the level 2 computer control,including the determination of strand surface target temperature,the communication between the level 2 computer and the PLC,the determination of spraying water by computer.With this technology used on the No.1 caster in the steelworks of Hangsteel,the inner quality of the strand was improved obviously.The corner cracking ≥2 grade was reduced from 8.3% to 0,the total inner defect was reduced to 36.3% compared with that on similar casters,and the scale on the surface was also reduced as its surface temperature was dropped.The cycle of actions from reading data,displaying data,calculating amount of spraying water,to giving data to the PLC,is performed by computer every six seconds.And on-line and closeloop control of secondary cooling water is realized.