Zinc calcine and zinc oxide smoke combined leaching process

• Main Authors: LUO HENG, LIU XIAN, LI ZONGXING, LIU JIANPING, XIE FUHUA, DENG HAIBO, XIAO HAIYUN, FAN MAOSHENG, ZHANG MEI, JIN JIAQIANG, QIN HUI, YU QIUYAN, ZOU LIMING, XU GANG, YIN ZHAOHONG, CHEN CHUNLIN, DONG TIEGUANG
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2024
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a zinc calcine and zinc oxide smoke combined leaching process, which belongs to the technical field of zinc smelting and comprises five main steps of zinc calcine neutral leaching, acid leaching, mixed reduction leaching, neutralization reduction leaching and neutralization precipitation iron removal. According to the method, through combined treatment of leaching of the zinc calcine and leaching of the zinc oxide smoke dust, the zinc leaching rate can be increased by extracting the acid leaching acidity of the zinc calcine, the acid leaching liquid is used for leaching the acid leaching residues of the zinc oxide smoke dust, the leaching rate of the zinc oxide smoke dust is increased while an iron-arsenic-silicon open circuit of a zinc calcine leaching system is achieved, and the zinc oxide smoke dust leaching efficiency is improved. The generated reduction filtrate is neutralized and precipitated to settle iron, the complete separation of iron, arsenic and silicon is finally realize