1.013
IF5
0.901
IF
20
MNiSW
539
Cites 2016
 
 

Selective agglomeration of magnetite in entlandite-serpentine system and implication for their separation

Wei Ji Lu 1  ,  
Zhitao Yuan 1  ,  
Jiongtian Liu 1, 2,  
Lixia Li 1,  
Nailing Wang 1,  
 
1
Institute of Minerals Engineering Research, Northeastern University
2
School of Chemical and Energy, Zhengzhou University
Physicochem. Probl. Miner. Process. 2017;53(2):943–955
Publish date: 2017-04-30
KEYWORDS:
TOPICS:
ABSTRACT:
In nickel sulfide processing, magnesium silicates (serpentines) can easily form slime coatings or hetero-aggregation on pentlandite surfaces, and hence decrease the pentlandite flotation rate and recovery. In this work, magnetic separation of pentlandite from serpentine using selective magnetic coating through adding magnetite fines as magnetic seeds was investigated. Interactions of magnetite-pentlandite and magnetite-serpentine were calculated by the DLVO (Derjaguin-Landau-Verwey-Overbeek) theory. The results show that the interaction of magnetite-pentlandite was obviously stronger than that of magnetite-serpentine with an external weak magnetic field (4776 A/m-1). Therefore, fine magnetite fractions selectively adhered to the pentlandite surfaces and enhanced its magnetism, resulting in being separated from serpentine by magnetic separation, which was further verified by magnetic coating-magnetic separation and SEM observations.
CORRESPONDING AUTHOR:
Wei Ji Lu   
Institute of Minerals Engineering Research, Northeastern University, NO. 3-11, Wenhua Road, Heping District, Shenyang, P. R. China, 110819 Shenyang, China
 
REFERENCES:
1. ANASTASSAKIS, G.N., 2002. Separation of fine mineral particles by selective magnetic coating. J. Colloid Interf. Sci. 256(1), 114-120.
2. BREMMELL, K.E., FONRNASIERO, D., RALSTON, J., 2005. Pentlandite–lizardite interactions and implications for their separation by flotation. Colloid. Surface. A: Physicochem. Eng. 252(2-3), 207-212.
3. BOBICKI, E.R., LIU, Q., XU, Z., 2014. Microwave heating of ultramafic nickel ores and mineralogical effects. Miner. Eng. 58(4), 22-25.
4. CHEN, G., GRANO, S., SOBIERAJ, S., RALSTON, J., 1999. The effect of high intensity conditioning on the flotation of a nickel, part 2: mechanisms. Miner. Eng. 12(11), 1359-1373.
5. EDWARDS, G.R., KIPKIE, W.B., AGAR, G.E., 1985. The effect of slime coatings of the serpentine minerals, chrysotile and lizardite on pentlandite flotation. Int. J. Miner. Process. 7(1), 33-42.
6. FOMASIERO, D., RALSTON, J., 2005. Cu (II) and Ni (II) activation in the flotation of quartz, lizardite and chlorite. Int. J. Miner. Process. 76(1-2), 75-81.
7. FENG, D., ALDRICH, C., TAN, H., 2000. Removal of heavy metal ions by carrier magnetic separation of adsorptive particulates. Hydrometallurgy. 56(3), 359-368.
8. GAO, Y., GAO, Z., SUN, W., HU, Y., 2016a, Selective flotation of scheelite from calcite: A novel reagent scheme. Int. J. Miner. Process. 154, 10-15.
9. GAO, Z., GAO, Y., ZHU, Y., HU, Y., SUN, W., 2016b, Selective flotation of calcite from fluorite: a novel reagent schedule. Minerals 6, 114.
10. HOGG, R., HEALY, T.W., FUERSTENAU, D.W., 1965. Mutual coagulation of colloidal dispersions. T. Faraday Soc. 62, 1631-1658.
11. LU, J.W., YUAN, Z.T., LIU, J.T., LI, L.X., ZHU, S., 2015. Effects of magnetite on magnetic coating behavior in pentlandite and serpentine system. Miner. Eng. 72(1), 115-120.
12. LU, S.C., 2003. Industrial Suspensions: properies, preparation and processing. Chemical Industry Press: Beijing, China.
13. PENG, Y., SEAMAN, D., 2011. The flotation of slime–fine fractions of Mt. Keith pentlandite ore in de-ionised and saline water. Miner. Eng. 24(5), 479-481.
14. PIETROBON, M.C., GRANO, S.R., SOBIERAJ, S., RALSTON, J., 1997. Recovery mechanisms for pentlandite and MgO-bearing gangue mineral ores from Western Australia. Miner. Eng. 10(8), 775-786.
15. PATRA, P., BHAMBHANI, T., VASUDEVAN, M., NAGARAJ, D.R., SOMASUNDARAN, P., 2012. Transport of fibrous gangue mineral networks to froth by bubbles in flotation separation. Int. J. Miner. Process. 104-105(2), 45-48.
16. PARSONAGE, P., 1988. Principles of mineral separation by selective magnetic coating. Int. J. Miner. Process. 24(3-4), 269-293.
17. PRAKASH, S., DAS, B., MOHANTY, J.K., VENUGOPAL, R., 1999. The recovery of fine iron minerals from quartz and corundum mixtures using selective magnetic coating. Int. J. Miner. Process. 57(2), 87-103.
18. PRAKASH, S., DAS, B., VENUGOPAL, R., 1999. Magnetic separation of calcite using selective magnetite coating. Magn. Electr. Sep. 10(1), 1-19.
19. SENIOR, G.D., and THOMAS, S.A., 2005. Development and implementation of a new flowsheet for the flotation of a low grade nickel ore. Int. J. Miner. Process. 78(1), 49-61.
20. SINGH, S., SAHOO, H., RATH, S.S., SAHU, A.K., DAS, B., 2015. Recovery of iron minerals from Indian iron ore slimes using colloidal magnetic coating. Powder Technol. 269(1), 38-45.
21. SONG, S.X., LU, S.C., ZHU, L.G., 1988. Magnetic traction force between ferromagnetic and weakly magnetic particles in water. J. Wuhan Iron Steel Univ. 36(3), 12-18.
22. UDDIN, S., RAO, S.R., MIRNEZAMI, M., FINCH, J.A., 2012. Processing an ultramafic ore using fiber disintegration by acid attack. Int. J. Miner. Process. 102-103(1), 38-44.
23. UCBAS, Y., BOZKURT, V., BILIR, K., IPEK, H., 2014. Concentration of chromite by means of magnetic carrier using sodium oleate and other reagents. Physicochem. Probl. Miner. Process. 50(2), 767-782.
24. WANG, J., GAO, Z., GAO, Y., HU, Y., SUN, W., 2016, Flotation separation of scheelite from calcite using mixed cationic/anionic collectors. Miner. Eng. 98, 261-263.
25. WANG, Y., FORSSBERG, E., 1992. Aggregation between magnetite and hematite ultrafines utilizing remanent magnetization. Miner. Eng. 5(8), 895-905.
26. WELLHAM, E.J., ELBER, L., YAN, D., 1992. The role of carboxy methyl cellulose in the flotation of a nickel sulphide transition ore. Miner. Eng. 5(3), 381-395.
27. ZHANG, M.J., XU, Q., LUO, J., 1986. The mechanism of aggregation between fine particles of hematite and magnetite. Nonferr. Metal. 38(3), 21-26.
eISSN:2084-4735
ISSN:1643-1049