چکیده

Abstract Recovery of zinc from sulfide mineral Mehdi Abad Yazd ore mine, by direct oxidative leaching in the presence of manganese dioxide and ammonium persulphate as oxidative agents was studied and showed that ammonium persulphate was improved oxidant than other persulphate salts. So the purpose of this paper is study on effects of kinetic parameters such as particle size, temperature, acid concentration, effect of ferric and ferrous on zinc dissolution, and describe kinetic model by shrinking core model (SCM), through direct oxidative leaching in presence of sulfuric acid media, Manganese dioxide (MnO2) and Ammonium persulphate individually, as oxidative agents. Based on results The optimum leaching conditions were determined to be: particle size +75µm_+45µm, acid concentration of 5% (v/v) and in presence of manganese dioxide 20% (w/v), and it was investigated that there is a significant impact on the recovery temperature increase especially in the temperature of 85 ° C maximum amount to their recovery. The kinetic data was analyzed by SCM. The new SCM variant fits the kinetic data more appropriately and finally the activation energy was calculated to be Ea=21.78 kJ/mol.

کليدواژه ها

KEYWORDS: LEACHING, OXIDATIVE AGENTS, KINETIC MODEL, SULFIDE MINERAL

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احسان ابراهیمی , 1399 , لیچینگ سولفید روی در حضور منگنز دی اکسید و آمونیوم پرسولفات به عنوان عوامل اکسیداتیو , دومین کنفرانس ملی مدلسازی در مهندسی معدن و علوم وابسته