Dolomite apatite separation by amphoteric collector in presence of bacteria 被引量：1

Dolomite apatite separation by amphoteric collector in presence of bacteria

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摘要 Bioflotation represents one of the growing trends to enhance the selectivity of conventional flotation processes.It utilizes the micro-organisms to replace or to interact with the chemical reagents to increase the gap between surface properties of similar minerals and to enhance the separation selectivity.In this work,dolomite-phosphate separation was investigated using amphoteric collector (dodecyl-N-carboxyethyl-N-hyroxyethyl-imidazoline) in presence of bacteria.Two types of bacteria,Corynebacteriumdiphtheriae-intermedius (CDI),and Pseudomonas aeruginosa (PA),were used.The collector bacteria interaction was characterized by Fourier transform infra-red (FTIR),frothing height and Zeta potential.The results show that the collector bacteria interaction improves the flotation selectivity.Although,the PA positively affects the separation results,the CDI cannot lower the MgO to less than 1%.A phosphate content of 0.7% MgO and 31.77% P2O5 with a recovery of 68% at pH 11,3.0 kg/t amphoteric collector,4×107 cells of PA is obtained. Bioflotation represents one of the growing trends to enhance the selectivity of conventional flotation processes. It utilizes the micro-organisms to replace or to interact with the chemical reagents to increase the gap between surface properties of similar minerals and to enhance the separation selectivity. In this work, dolomite-phosphate separation was investigated using amphoteric collector （dodecyl-N-carboxyethyl-N-hyroxyethyl-imidazoline） in presence of bacteria. Two types of bacteria, Corynebacterium- diphtheriae-intermedius （CDI）, and Pseudomonas aeruginosa （PA）, were used. The collector-bacteria interaction was characterized by Fourier transform infra-red （FTIR）, frothing height and Zeta potential. The results show that the collector-bacteria interaction improves the flotation selectivity. Although, the PA positively affects the separation results, the CDI cannot lower the MgO to less than 1%. A phosphate content of 0.7% MgO and 31.77% P205 with a recovery of 68% at pH 11, 3.0 kg/t amphoteric collector, 4× 10^7 cells of PA is obtained.

作者 Elmahdy Ahmed El-Mofty Salah Abdel-Khalek Mohamed Abdel-Khalek Nagui El-MidanyAyman

机构地区 Central Metallurgical Research and Development Institute Mining

出处《Journal of Central South University》 SCIE EI CAS 2013年第6期1645-1652,共8页 中南大学学报（英文版）

关键词分离选择性集电极白云石细菌磷灰石磷酸盐含量铜绿假单胞菌 ZETA电位 dolomite phosphate amphoteric collector bacteria bio-flotation carbonate minerals

分类号 TD97 [矿业工程—选矿] TD925.5 [矿业工程—选矿]

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1EL-MIDANY A.A. Separation of dolomite from phosphate rock by reactive flotation [D]. University of Florida, 2004: 1-129.
2EL-SHALL H, ZHANG P, ABDEL KHALEK N, EL-MOFTY S. Beneficiation technology of phosphates: Challenges and solutions [J] Mineral and Metallurgical Processing, 2004, 21 (1): 17-26.
3EL-SHALL H, ZHANG P, SNOW R. Comparative analysis of dolomite/francolite flotation techniques [J]. Minerals and Metallurgical processing, 1996, 8(3): 135- 140.
4SOMASUNDARAN P, REN Y, RAO M Y. Applications of biological processes in mineral processing [J]. Colloids and Surfaces, 1998, 133(1): 13-23.
5REDDY R G, IMBRIE W P, QUENEAU P B. Residues and effluents: Processing and environmental considerations [M]. Pennsylvania (PA) USA: The Minerals, Metals and Materials Society, 1991.
6SMITH R W, MISRA M. Recent developments in the bioprocessing of minerals [J]. Mineral Processing and Extractive Metallurgy Review, 1993, 12(1): 37-60.
7DUGAN P R. The function of microbial polysaccharides in biofloeeulation and biosorption of metal ions [C]// ATTIA Y A. Floeeulation in Biotechnology and Separation Systems. San Francisco: Elsevier, 1987: 337-350.
8RAO M K Y, NATARAJAN K A, SOMASUNDARAN E Effect of bacterial conditioning of sphalerite and galena with Thiobaeillus ferrooxidans on their flotability [C]// Engineering Foundation Conference, Santa Barbara, California: Springer, 1991 : 105-120.
9SADOWSKI Z, GOLAB Z. Biomodification of mineral surface properties by Aspergillus niger [C]// SM1TH R W, MISRA M. Engineering Foundation Conference, Santa Barbara, California. Mineral Bioprocessing, 1991:81- 90.
10RAO M K Y, NATARAJAN K A, SOMASUNDARAN P. Effect of biotreatment with Thiobacillus ferrooxidans on the floatability of sphalerite and galena [J]. Minerals and Metallurgical Processing, 1992, 9(4): 95- 100.

二级参考文献23

1de SOUZA A D, PINA P S, LEAO V A. Bioleaching and chemical leaching as an integrated process in the zinc industry [J]. Minerals Engineering, 2007, 20(6): 591-599.
2HOANG J, REUTER M A, MATUSEWICZ R, HUGHES S, PIRET N. Top submerged lance direct zinc smelting [J]. Minerals Engineering, 2009, 22 (9/10) :742-751.
3RODRIGUEZ Y, BALLESTER A, BLAZQUEZ M, GONZALEZ F, MUNOZ J. New information on the sphalerite bioleaching mechanism at low and high temperature [J]. Hydrometallurgy, 2003, 71(1/2): 57-66.
4FOWLER T, CRUNDWELL F. Leaching of zinc sulfide by Thiobacillus ferrooxidans: Experiments with a controlled redox potential indicate no direct bacterial mechanism [J]. Applied and Environmental Microbiology, 1998, 64(10): 3570-3575.
5XIA Lehxian, LIU Jian-she, XIAO Li, ZENG Jia, LI Ban-mei, GENG Mei-mei, QIU Guan-zhou. Single and cooperative bioleaching of sphalerite by two kinds of bacteria-Acidithiobacillus ferriooxidans and Acidithiobacillus thiooxidans [J]. Transactions of the Nonferrous Metals Society of China, 2008, 18(1): 190-195.
6P1NA P, LEAO V, SILVA C, DAMAN D, FRENAY J. The effect of ferrous and ferric iron on sphalerite bioleaching with Acidithiobacillus sp [J]. Minerals Engineering, 2005, 18(5): 549-551.
7MOUSAVI S, JAFARI A, YAGHMAEI S, VOSSOUGHI M, ROOSTAAZAD R. Bioleaching of low-grade sphalerite using a column reactor [J]. Hydrometallurgy, 2006, 82(1/2): 75-82.
8MOUSAVI S, YAGHMAEI S, VOSSOUGHI M, JAFARI A, ROOSTAAZAD R. Zinc extraction from Iranian low-grade complex zinc-lead ore by two native microorganisms: Acidithiobacillus ferrooxidans and sulfobacillus [J]. International Journal of Mineral Processing, 2006, 80(2/3/4): 238-243.
9ROHWERDER T, GEHRKE T, K1NZLER K, SAND W. Bioleaching review part A [J]. Applied Microbiology and Biotechnology, 2003, 63(3): 239-248.
10da SILVA G. Relative importance of diffusion and reaction control during the bacterial and ferric sulphate leaching of zinc sulphide [J]. Hydrometallurgy, 2004, 73 (3/4): 313-324.