Abstract：Experiments were conducted on the process of pressure acid leaching of steelmaking dust from galvanized sheet scrap, which were compared with normal pressure acid leaching process for investigating the effects of initial concentration of sulfuric acid, leaching time, liquid to solid ratio, as well as temperature on the leaching rate. Results showed that the pressure leaching technique can result in both zinc ferrite that is insoluble in weak acid at the normal temperature and refractory zinc silicate effectively leached. It is found that the leaching process at temperature of 140 ℃ for 1.5 h in the reactor with pressure kept at 0.6 MPa, with liquid to solid ratio at 6∶1, rotating at 500 r/min, concentration of sulfuric acid at 120 g/L, resulted in the leaching rate of zinc and iron at 98.35% and 3.51%, respectively, with almost all lead into the slag phase. The silicon content in the leaching liquid is only 0.06 g/L, indicating an effective separation between zinc and impurities in the dust.
贺山明, 汪金良, 李啊林, 曹才放, 杨亮. 废镀锌板炼钢粉尘加压硫酸浸出试验研究[J]. 矿冶工程, 2016, 36(2): 84-87.
HE Shan-ming, WANG Jin-liang, LI A-lin, CAO Cai-fang, YANG Liang. Experimental Study on Pressure Acid Leaching of Steelmaking Dust from Galvanized Sheet Scrap. Mining and Metallurgical Engineering, 2016, 36(2): 84-87.
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2016, Vol. 36 
