Improvement in Descaling of Hot Strip by Hydrochloric Acid

Mechanism of descaling process by hydrochloric acid was observed and a mathematical model was established, which indicated correct direction of improvement in pickling method, such as installing predescaler prior to acid tanks. Various factors dominating descaling time were also investigated by experiments. By combining all the facts and theories obtained, a sumulation program was developed which made possible the prediction of acid concentration distribution along the acid tanks. By utilizing the simulator optimization of pickling facilities specification became possible.