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Chemeca 88: Australia's Bicentennial International Conference for the Process Industries; Preprints of Papers, 1988
Finely grained ores require intense grinding for liberation of individual minerals. In some cases... more Finely grained ores require intense grinding for liberation of individual minerals. In some cases the liberation size may be too fine for efficient beneficiation by conventional techniques, e.g. flotation. This problem is particularly pronounced for complex sulphide ores. Spherical agglomeration, a physico-chemical method of separation, is being investigated as a possible alternative for the treatment of fine mineral slimes. This paper presents the results of experiments that were carried out to evaluate the process for the separation of sulphide mineral particles (less than 10μm in diameter) of lead (galena), zinc(sphalerite) and iron (pyrite). Successful separations of galena and sphalerite were achieved, individually and in mixtures with quartz, with good recovery and high selectivity. Selectivity was also achieved for galena/sphalerite, galena/pyrite and galena/sphalerite/pyrite mixtures. Both the chemical and physical parameters were found to be important in determining the recovery, the selectivity and the ultimate size and strength of the agglomerates.
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Bilimsel Madencilik Dergisi, Sep 1, 1992
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International Journal of Mineral …, 1990
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The effect of ferrous and ferric ions on pyrite-xanthate interaction was investigated with contac... more The effect of ferrous and ferric ions on pyrite-xanthate interaction was investigated with contact angle measurements and UV-visible spectroscopy studies. Experimental works were conducted in chemically manipulated electrochemical conditions between 0-500 mV potential ranges. KMnO4 and Na2S2O5 were used to manipulate potential as oxidizing and reducing agents, respectively. Xanthate improved hydrophobicity of pyrite due to coverage of mineral surface with dixanthogen, but the contact angle decreased with the addition of ferrous and ferric ions. Pyrite displayed hydrophobic property in mild to moderately oxidizing conditions, whereas lower contact angle values were obtained at higher potentials due to the increase in the number of hydrophilic sites on the surface both in the absence and presence of xanthate and Fe-ions. UV spectroscopy study and contact angle measurements proposed that although the ferric hydroxy xanthate complex species could form at highly oxidizing potentials, the...
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Minerals Engineering, 2007
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International Journal of Mineral Processing, 2008
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International Journal of Mineral Processing, 1990
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Minerals Engineering, 2007
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Chemeca 88: Australia's Bicentennial International Conference for the Process Industries; Preprints of Papers, 1988
Finely grained ores require intense grinding for liberation of individual minerals. In some cases... more Finely grained ores require intense grinding for liberation of individual minerals. In some cases the liberation size may be too fine for efficient beneficiation by conventional techniques, e.g. flotation. This problem is particularly pronounced for complex sulphide ores. Spherical agglomeration, a physico-chemical method of separation, is being investigated as a possible alternative for the treatment of fine mineral slimes. This paper presents the results of experiments that were carried out to evaluate the process for the separation of sulphide mineral particles (less than 10μm in diameter) of lead (galena), zinc(sphalerite) and iron (pyrite). Successful separations of galena and sphalerite were achieved, individually and in mixtures with quartz, with good recovery and high selectivity. Selectivity was also achieved for galena/sphalerite, galena/pyrite and galena/sphalerite/pyrite mixtures. Both the chemical and physical parameters were found to be important in determining the recovery, the selectivity and the ultimate size and strength of the agglomerates.
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Imperial Users onl
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Bilimsel Madencilik Dergisi, Sep 1, 1992
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Bilimsel Madencilik Dergisi, Sep 1, 1994
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International Journal of Mineral …, 1990
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The effect of ferrous and ferric ions on pyrite-xanthate interaction was investigated with contac... more The effect of ferrous and ferric ions on pyrite-xanthate interaction was investigated with contact angle measurements and UV-visible spectroscopy studies. Experimental works were conducted in chemically manipulated electrochemical conditions between 0-500 mV potential ranges. KMnO4 and Na2S2O5 were used to manipulate potential as oxidizing and reducing agents, respectively. Xanthate improved hydrophobicity of pyrite due to coverage of mineral surface with dixanthogen, but the contact angle decreased with the addition of ferrous and ferric ions. Pyrite displayed hydrophobic property in mild to moderately oxidizing conditions, whereas lower contact angle values were obtained at higher potentials due to the increase in the number of hydrophilic sites on the surface both in the absence and presence of xanthate and Fe-ions. UV spectroscopy study and contact angle measurements proposed that although the ferric hydroxy xanthate complex species could form at highly oxidizing potentials, the...
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Minerals Engineering, 2007
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International Journal of Mineral Processing, 2008
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International Journal of Mineral Processing, 1990
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Minerals Engineering, 2007
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