Prospects of integrated processing of primary gold-bearing porphyry copper ore

The composition of test low-grade primary gold-bearing ore from the Svoboda site of the Malmyzh porphyry copper deposit in the Khabarovsk Krai is revealed. The test data on extraction of magnetite from the ore flotation tailings are described. Magnetite represents a finely grained micro-aggregate impregnation in metasomatic quartz, and forms complex concretions with quartz and sulfide minerals. Two generations of magnetite are disclosed, which differ in composition and habitus of crystals, and in impurities and foreign bodies. To improve comprehensiveness of the use of ore, a magnetic separation flowsheet is developed. It is demonstrated that it is possible to produce magnetite concentrates with the contents of 63.85% and 50.31% Fe from flotation tailings of ore –0.071 mm in size. After the use of the ore flotation-and-magnetic separation flowsheet, iron recovery reached 49% at Fe content of 2.7% in nonmagnetic fraction. The scanning electron microscopy of magnetite concentrates detected pure iron in the form of free grains and inclusions in magnetite, and revealed intermetallic compounds of Fe, Cr, Ni, Ti and Mn at the contents (%mass): Fe (60–82), Cr (0.4–20.5), Ni (3–8), Ti (0.4–1), Mn (0.5–3.5), and Ti–Co–Fe–tungsten intermetallic compound. Concretions of magnetite and quartz contain micro-shots of argentite and native silver with an impurity of Cd.

Gurman M. A., Korneeva S. I. Prospects of integrated processing of primary goldbearing porphyry copper ore. MIAB. Mining Inf. Anal. Bull. 2024;(12):92-102. [In Russ]. DOI: 10.25018/0236_1493_2024_12_0_92.

M.A. Gurman¹, Cand. Sci. (Eng), Leading Researcher, e-mail: mgurman@yandex.ru,
S.I. Korneeva¹, Cand. Sci. (Eng), Leading Researcher, e-mail: s_korneeva@mail.ru,
¹ Mining Institute, Far East Branch, Russian Academy of Sciences, 680000, Khabarovsk, Russia.

M.A. Gurman, e-mail: mgurman@yandex.ru.

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