Acid Recovery Systems

摘要

Pickling is an economical method of using acid to move impurties and scale from metals for changing surfaces in preparation for galvanizing, painting, etc. (see Figure 1). Wide variations are possible in the type, strength, and temperature of the acid solutions used. Sulfuric acid in the 5 to 40 percent concentration range is a common pickling acid for iron and steel. Sulfuric acid pickling tanks are typically heated to a temperature between 140 deg F (60 deg C) and 200 deg F (93 deg C) using steam or hot water circulating through a heat exchanger.