METHOD FOR REMOVING SCALE OF HOT ROLLED STEEL STRIP COILED AT HIGH TEMPERATURE

摘要

PURPOSE:To reduce the consumption of acid in a succeeding pickling stage and to improve the consumption unit of acid, by water cooling a hot rolled steel strip coiled at a specific temperature, before descaling it by providing a bend- stretching and a brushing treatment to it. CONSTITUTION:A coil 2 coiled at 600-700 deg.C after hot rolling, is dipped in the cooling water 3 in a coil-cooling tank 1 by mounting it on a coil-supporting bed 4, and is cooled for about 1-5hr. Next, after taking out the coil 2 from the tank 1 and uncoiling it to bend-stretch, the coil 2 is passed through plural bending rolls 6 arranged zigzag and is brushed by passing it between brushing rolls 7 and holding rolls 8, and finally it is sent to a pickling tank. In this way, the consumption unit of acid is lowered, and the treatment cost of waste acid, etc. are reduced.