A New Process for Treatment of Waste Acid in Smelter

Abstract

A kind of lead ash produced in the process of refining lead is used as waste acid treatment agent. The effects of experimental conditions, such as temperature, reaction time, agitation speed, catalyst dosage and velocity of waste acid flow, are investigated. The results show that agitation speed and liquid-solid ratio have little effect on removal ratio. Without catalyst, the optimum parameters are as follows: temperature, agitation speed and reaction time are 60 ºC, 400 r/min, 5 h, respectively. Under the above experimental conditions, the removal ratio of waste acid can reach above 95 %. Appropriately controlled adding speed of waste acid can greatly shorten the reaction time and lower reaction temperature when appropriate acetic acid is used as catalyst.