Acid Pressure Leaching A Pentlandite-Chalcopyrite-Pyrrhotite Concentrate.

Acid Pressure Leaching A Pentlandite-Chalcopyrite-Pyrrhotite Concentrate. by Canada. Dept. of Energy, Mines and Resources. Mines Branch. Download PDF EPUB FB2

The separation of pentlandite from chalcopyrite, pyrrhotite and gangue in nickel projects throughout the world V.

Lawson, G. Hill, L. Kormos, G. Marrs AusIMM Mill. Since the bulk sulphide concentrate carries majority of the sulphide minerals like pentlandite, violarite, millerite, pyrrhotite, pyrite and other sulphides of copper, nickel arsenide, etc., the nickel grade in the bulk concentrate is often diluted predominantly with pyrrhotite containing low.

For flotation concentrates containing about 80 g/t Pt and Pd, after pre-treating by pressure acid leaching, followed by two steps of pressure cyanide leaching, up to 90–94% Pt and 99% Pd.

Key features of the process were the use of superfine grinding of the concentrate (to a P98 of 12 to 15 μm and P80 of 6 to 7 μm), pressure leaching at °C and 1, kPa ( psi) oxygen.

One rejects primarily monoclinic pyrrhotite that is magnetic. After a secondary FLOTATION OF CHALCOPYRITE, PENTLANDITE, PYRRHOTITE ORES 1 1 magnetic separation and regrinding to liberate most of the chalcopyrite and pentlandite, a two stage flotation separation is done to produce a "copper- nickel concentrate" before the pyrrhotite is by: The acid neutralises the hydroxyl ions and thereby maintains the solubility of metal ions in the vicinity of the cathode.

Geoelectrochemistry and stream dispersion. Fig. An element collector: l- titanium rod electrode; 2- solution of nitric acid; 3polyethylene vessel; 4- semi-permeable membrane (reproduced with permission from Putikov 5/5(4). Effect of aluminum and yttrium doping on zinc sulphide nanoparticles.

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The Base Metal Refinery employs the Sherrit Gordon acid pressure leaching technology, which involves successive stages of acid-oxidation leaching. The main base metal sulphides associated with the PGMs are pentlandite, chalcopyrite, pyrrhotite and pyrite.

The concentrate is further upgraded by leaching, dried and dispatched to Western. download pdf ( MB) - Minerals West Coast.

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The cobalt is crystallised and isolated as cobalt sulphate. After leaching, the final insoluble concentrate (FIC) has percentage levels of PGE and is transported to the PMR where it is refined. In the PMR process, FIC is pressure leached with hydrochloric acid and chlorine.

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