PROCESSING OF SOLUTION AFTER LEACHING OF STEELMAKING DUST BY CEMENTATION

Abstract

The work includes a description of a hydrometallurgical processing of steelmaking dust a waste product of steel production from electric arc furnace (EAF). Most attention is paid to cementation. The aim is to study purification of solution by cementation of impurities that could cause problems in zinc electrowinning process. Most attention is focused on removal of cadmium and lead from the sulphate and chloride solutions. The highest efficiency of cadmium removal was achieved in the sulphate solution, at 25, 50, 80 °C and at pH = 4, 5, 6. The highest efficiency of lead removal from sulphate solution (87.61 %) was achieved at pH = 6 and temperature of 80 °C. In chloride solution, the highest efficiency of lead removal (99.94 %), at the same pH but at a lower temperature of 50 °C was achieved.

Keywords

• Steelmaking dust
• hydrometallurgy
• cementation
• lead
• cadmium
• zinc powder