Mineral processing possibility of oxide lead and zinc minerals from Angooran deposit in Zanjan province, Iran

• The Angooran Lead & Zinc Mine located in Zanjan province-Iran is the greatest one of its kind in Middle East. At present, a part of ore body located within host rock mineralized schist is not planned for milling project design. In the present study, the mineral processing possibility of mineralized schist deposit within Angooran Lead & Zinc Ore deposit was investigated. The ore microscopy studies were carried out to determine the mineral content of the ore deposit. The natural breakage and grindability were studied to determine the behavior of the desired ore during several stage breakages. The liberation degree of crushed ore in different size fractions was estimated by the Counting method. The Heavy Liquid Tests for three size fractions (-212+150; -150+125; -125+75 μm) were carried out in different density fractions and were assayed for lead, zinc and SiO2 content. The wet chemical assay, XRF, XRD and ore microscopy studies showed that the ore subjected to different stages included Smithsonite (16%), Mimetite (0.6%), Quartz (52%), Sericite (16.5%), Kaolinite (12%), Iron Oxides Minerals (1.5%), Rutile (0.4%) and other minerals (1%). The Locking Analysis for different size fractions showed that the size fraction of -125+75 μm to decrease the overgrinding was selected as the best amount of liberation degree and the result of HLS confirmed this, i.e. the most Zn content was in size fraction of -125+75 μm, while the applicability of gravity concentration was in size fraction of -150+125 μm. The mineral processing circuits for size fraction -150, +125 μm can be assessed for gravity concentration as a preconcentration process and for the size fraction -125, +75 μm in the flotation process in the next stages.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)

Nyckelord

Mineralteknik

Mineral Processing

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