Grinding media wear and its effect on the flotation of sulfide minerals

Adam, Kenneth R.; Natarajan, K.A.; Iwasaki, I.

doi:10.1016/0301-7516(84)90021-8

Cited by 89 publications

(15 citation statements)

References 3 publications

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“…More specifically, the grinding chemistry through electrochemical interactions between grinding media and sulphide minerals is known to markedly affect the subsequent sulphide flotation. A great number of works on this subject are reported in the literature (Adam et al, 1984;Bruckward et al, 2011;Gonçalves et al, 2003;Greet et al, 2004;Grano, 2005a, 2005b;Ekmekçi et al, 2005;Grano, 2009). Carbon steel grinding media, through galvanic interactions and oxidationreductive reactions, are responsible for the precipitation of iron oxyhydroxy species at the sulphide surfaces, along with pulp dissolved oxygen (DO) scavenging and lowering of pulp electrochemical potential (Eh), leading to poor sulphide floatability.…”

Section: Introductionmentioning

confidence: 99%

Oxidative weathering of a copper sulphide ore and its influence on pulp chemistry and flotation

Jacques

Greet²,

Bastin

2016

Minerals Engineering

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a b s t r a c tThe influence of grinding chemistry on the flotation behaviour of sulphides minerals has been widely studied. However, its influence on partially oxidised sulphide ores is not well documented. Various oxidation events can affect a sulphide ore, either during in situ weathering of an ore body or during the different extraction and processing stages (mining operations, stockpiling, crushing, milling and flotation). In this study, a hypogene copper sulphide ore was artificially oxidised to various lengths of time by percolating a small quantity of acidic ferric sulphate solution inoculated with a mixed bacterial culture through packed columns. For each time interval a series of grinding-flotation tests using different grinding media alloys was completed. The grinding and flotation chemistry were compared and linked to the flotation behaviour of the ore samples.The results reveal that as oxidation progressed the copper metallurgy deteriorated. However, the deleterious effects of oxidation could be partially overcome through the application of the right grinding chemistry.

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Section: Introductionmentioning

confidence: 99%

Oxidative weathering of a copper sulphide ore and its influence on pulp chemistry and flotation

Jacques

Greet²,

Bastin

2016

Minerals Engineering

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“…Rest potential was measured using MnO 2 and chalcopyrite electrodes prepared by mounting granular MnO 2 (extra pure grade, Kanto chemical Co. Ltd.) and chalcopyrite obtained from a mine in Indiana state, USA in 6.25 mm ID Lucite tubing as described by Adam et al 13 . Electrical contact was made using a few drops of mercury to contact to a platinum wire.…”

Section: Methodsmentioning

confidence: 99%

Galvanic Leaching of Chalcopyrite Using Manganese Oxides in Spent Zinc-Carbon Batteries

Nakazawa

Hareyama

2016

Resources Processing

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It is well known that galvanic interaction between sulfide minerals and manganese oxides in manganese nodules accelerates the leaching of sulfide minerals. Zinc-carbon batteries contain a moist paste (hereafter, black paste) of manganese oxides and graphite powder as cathode mix. We have investigated the feasibility of galvanic leaching of chalcopyrite using chemical reagent MnO 2 and black paste. Addition of MnO 2 enhanced the leaching of chalcopyrite in sulfuric acid media with pH 1.0 and Mn concentration also increased remarkably. Extraction yields of Cu and Mn were 52% and 23% respectively at a MnO 2 to chalcopyrite mass ratio of 4 in 24 days. In the presence of black paste the kinetics of chalcopyrite leaching was accelerated dramatically and 83% of Cu in the concentrate was extracted in 40 hours. The graphite powder contained in black paste could play an important role in the galvanic leaching of chalcopyrite in the presence of MnO 2 .

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“…Since reagent additions can be costly, the same could be achieved by using appropriate grinding media that can provide reducing conditions. It is well known that the rate of oxidation of sulfide minerals such as pyrite and pyrrhotite is critically affected by galvanic contacts (Nakazawa and Iwasaki, 1985;Adam et al, 1984).…”

Section: Ccmpmentioning

confidence: 99%