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Selective dispersion-flocculation and flotation studies on a siliceous copper ore

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Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
A low-grade copper ore from Mpanda Mineral Field (MMF), Tanzania containing 0.90% Cu, 10.40% Fe and 58.3% SiO2 was subjected to beneficiation adopting selective dispersion, flocculation and flotation techniques. Based on the mineralogical characterization of the sample chalcopyrite, pyrite and quartz were identified as the major minerals. The isoelectric point of MMF ore was observed to be at pH 2.7, signifying that the ore was highly siliceous. The addition of sodium trisilicate and xanthan gum shifted the zeta potential of ore to more electronegative values. Adsorption of xanthan gum on chalcopyrite and silica indicated that the maximum adsorption was at pH 2.3 for chalcopyrite and the adsorption isotherm exhibited L2 type of the Giles classification. On the contrary, no adsorption of xanthan gum on silica was observed. The ground ore was selectively dispersed and flocculated at pH 9.7 using 30 ppm of sodium trisilicate and 30 ppm of xanthan gum. The grade of CuFeS2 was improved to 19.8% after 3 desliming stages. Flotation of the flocculated portion was carried out at pH 10.30 using 30 g/t of potassium amyl xanthate and potassium ethyl xanthate (1:1) , 40 g/t of Na2S as a sulphidising agent and methyl iso-butyl carbinol (MIBC) as a frother yielding a rougher concentrate with silica and chalcopyrite grades of 8.4% and 23.5% respectively with corresponding recoveries of 4.8% and 92.8% respectively. Additionally, rougher concentrate was subjected to cleaner flotation yielding silica and chalcopyrite grades of 1.8% and 29.2 % respectively and with recoveries of 1.2% and 89.1% respectively.
Rocznik
Strony
1282--1291
Opis fizyczny
Bibliogr. 19 poz., rys., tab.
Twórcy
autor
  • Indian Institute of Science
  • Indian Institute of Science
Bibliografia
  • DAMIAN, F., DANIEL, F., JOHN, R., 1999. Zeta potential study of the oxidation of copper sulfide minerals, Colloids surf., A, 146, 113-121.
  • DUBOIS, K., GILLES, K. A, HAMILTON. K., REBERS. P, FRED. S., 1956. Colorimetric Method for Determination of Sugars and Related Substances, Anal. Chem., 28, 350.
  • FRIEND, J.P., KITCHENER, J.A., 1972. Some physico—chemical aspects of the separation of finely-divided minerals by selective flocculation, Chem. Eng. Sci. 28, 1071.
  • GAUDIN, A.M., 1939. Principiles of Mineral Dressing, McGRAW-HILL, UK., 136-137.
  • GILES, C.H., MACEWAN, T.H., NAKHWA, S., SMITH, D., 1960. Studies in Adssorption, J. Chem. Soc. p. 3973-3993.
  • KEMPPAINEN, K., TERHI, S., OSSI, L., ARI, Ä., HENRIKKI, L., MIRJA, I., 2016. Flocculation of fine hematite and quartz suspensions with anionic cellulose nanofibers, Chem Eng Sci, 148, 256-266.
  • LI, H., Zhou, Z., Xu,. Z and Masliyah, J., 2005. Role of Acidified Sodium Silicate in Low Temperature Bitumen Extraction from Poor-Processing Oil Sand Ores, Ind. Eng. Chem. Res., 44, 4753-4761.
  • LIU, Q., LASKOWSKI, J.S, 1989. The interactions between dextrin and metal hydroxides in aqueous solutions, J. Colloid Interface Sci., 130, 101-111.
  • LIU, Q., LASKOWSKI, J.S, 1989. The role of metal hydroxides at mineral surfaces in dextrin adsorption, I. Studies on modified quartz samples, Int. J. Miner. Process., 26, 297-316.
  • LIU, Q., LASKOWSKI, J.S, 1989. The role of metal hydroxides at mineral surfaces in dextrin adsorption, II. Chalcopyrite- galena separations in the presence of dextrin, Int. J. Miner. Process., 27, 147-155.
  • MWEENE, L., and SUBRAMANIAN, S., 2018. Beneficiation of a complex low-grade copper ore, Copper-Cobalt Africa, SAIMM Symposium series S97, 123-129.
  • NYAMEKYE, G.A., J.S. LASKOWSKI, J.S., 1993. Adsorption and electrokintic studies on the dextrin-sulphide mineral modified quartz samples, Int. J. Miner. Process., 26, 297-316. Interactions, J. Colloid Interface Sci., 157, 160-167.
  • QIN, W., WEI, Q., JIAO, F., YANG, C., LIU, R., WANG, P., KE, L., 2013. Utilization of polysaccharides as depressants for the flotation separation of copper/lead concentrate, Int. J. Mineral. Process., 23, 179-186.
  • RATH, R.K., SUBRAMANIAN, S., SIVANANDAMAND PRADEEP, 2001. Studies on the interaction of guar gum with chalcopyrite, CMQ, 40, 1, 1-12.
  • RATH, R.K., SUBRAMANIAN, S., 1999. Adsorption, electrokinetic and differential flotation studies on sphalerite and galena using dextrin, Int.J. Miner. Process., 57, 265-283.
  • ROSALAM, S., ENGLAND, R., 2006. Review of xanthan gum production from unmodified starches by Xanthomonas comparetris sp, Enzyme Microb. Technol. 39 (2), 197-207.
  • SARAVANAN, L., SUBRAMANIAN, S., 2016. Surface chemical properties and selective flocculation studies on alumina and silica suspensions in the presence of xanthan gum, Miner. Eng. 98, 213-222.
  • SUTHERLAND, W., 1977. Microbial exopolysaccharide synthesis. Dlm, In: Sandford PA, Laskin A, Extracellular microbial polysaccharides. USA: ACS, 40–57.
  • TEMPIO, J.S., ZATZ, J.L., 1981. Interaction of Xanthan Gum with Suspended Solids, J. Pharm. Sci., 70 (5), 5.
Uwagi
PL
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-a01b1526-db24-4e10-ae7c-e158cd489592
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