Concentrating the Zn-Pb sample from Nignan ore deposit
DOI:
https://doi.org/10.17794/rgn.2025.5.10Keywords:
Noahang mineral area, flotation, degree of liberation, grade, recoveryAbstract
The aim of the present study is to increase the grade of zinc from lead and zinc ore from the Noahang (Chah-Ahan) area of the Nignan deposit to more than 40% Zn, using the flotation method. The experiments were conducted on a low-grade sample with average grades of 3% zinc and 0.05% lead. The main zinc minerals in this sample were sphalerite and smithsonite in the carbonate field, and galena was rarely observed. The results of mineralogical studies and polished thin sections showed that the degree of liberation of zinc ores in the size fraction -106+75 μm was 90-95%. Different parameters such as size, solid mass percentage, type and dosage of collector were investigated, and under optimal conditions, a concentrate with a grade of 5% Zn and 70.4% recovery was obtained. In addition, kinetic experiments were conducted to achieve the highest Zn recovery in the rougher stage, which reached up to 58.6% of recovery. The results indicated that the best grade and recovery of zinc were achieved when the sample was crushed with a wet rod mill for 8 minutes to reach to the desired degree of liberation. The final grade and recovery of flotation method were obtained as 42.19 and 40.08% for zinc concentrate, respectively.
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Copyright (c) 2025 Maryam Abedi Moghadam, Marzieh Hosseini Nasab, Mohammad Noaparast
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