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The Effect of Microwave Heating on the Mineralogical Phase Transformation of Pyrite and Fe Leaching
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 Title & Authors
The Effect of Microwave Heating on the Mineralogical Phase Transformation of Pyrite and Fe Leaching
You, Don-Sang; Park, Cheon-Young;
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 Abstract
In order to study the phase transformation of pyrite and to determine the maximum Fe leaching factors, pyrite samples were an electric furnace and microwave oven and then ammonia leaching was carried out. The rim structure of hematite was observed in the sample exposed in an electric furnace, whereas a rim structure consisting of hematite and pyrrhotite were found in the microwave treated sample. Numerous interconnected cracks were only formed in the microwave treated sample due to the arcing effect, and these cracks were not found in the electric furnace treated sample. Under XRD analysis, pyrite and hematite were observed in the electric furnace treated sample, whereas pyrite, hematite and pyrrhotite were found in the microwave treated sample. The results of the pyrite sample leaching experiments showed that the Fe leaching was maximized with the particle size of -325 mesh, sulfuric acid of 2.0 M, ammonium sulfate of 1.0 M, and hydrogen peroxide of 1.0 M. The electric furnace and microwave treated samples were tested under the maximum leaching conditions, the Fe leaching rate was much greater in the microwave treated sample than in the electric furnace treated sample and the maximum Fe leaching time was also faster in the microwave treated sample than in the electric furnace treated sample. Accordingly, it is expected that the microwave heating can enhance (or improve) Fe leaching in industrial minerals as well as pyrite decomposition in gold ores.
 Keywords
pyrite;microwave heating;hematite;pyrrhotite;
 Language
Korean
 Cited by
 References
1.
Al-Harahsheh, M. and Kingman, S.W. (2004) Microwaveassisted leaching-a review. Hydrometallurgy, 73, 189-203. crossref(new window)

2.
Allan, G.C. and Woodcock, J.T. (2001) A review of the flotation of native gold and electrum. Minerals Engineering, 14, 931-962. crossref(new window)

3.
Amankwah, R.K. and Ofpri-Sarpong, G. (2011) Microwave heating of gold ores for enhanced grindability and cyanide amenability. Minerals Engineering, 24, 541-544. crossref(new window)

4.
Amankwah, R.K. and Pickles, C.A. (2009) Microwave roasting of a carbonaceous sulphidic gold concentrate. Minerals Engineering, 22, 1095-1101. crossref(new window)

5.
Amankwah, R.K., Khan, A.U., Pickles, C.A., and Yen, W.T. (2005) Improved grindability and gold liberation by microwave pretreatment of a free-milling gold ore. Mineral Processing and Extractive Metallurgy(Transaction of the Institute of Minerals and Metallury C), 114, 30-36. crossref(new window)

6.
Antonijevic, M.M, Dimitrijevic, M., and Jankovic, Z. (1997) Leaching of pyrite with hydrogen peroxide sulphuric acid. Hydrometallurgy, 46, 71-83. crossref(new window)

7.
Barani, K., Javad Koleini, S.M., and Rezaei, B. (2011) Magnetic properties of an iron ore sample after microwave heating. Separation and Purification Technology, 76, 331-336. crossref(new window)

8.
Beckstead, L.W. and Miller, J.D. (1977) Ammonia, oxidation leaching of chalcopyrite-reaction kinetics. Metallurgical Transactions B, 8B, 19-29.

9.
Boyabat, N., Ozer, A.K., Bayrakceken, S., and Gulaboglu, M.S. (2003) Thermal decomposition of pyrite in the nitrogen atmosphere. Fuel Processing Technology, 85, 179-188.

10.
Chen, G., Chen, J., Guo, S., Li, J., and Srinivasakanan, C. (2012) Dissociation behavior and structural of ilmenite ore by microwave irradiation. Applied Surface Science, 258, 4826-4829. crossref(new window)

11.
Das, R.P. and Anand, S. (1995) Precipitation of iron oxides from ammonia-ammonium sulphate solutions. Hydrometallurgy, 38, 161-173. crossref(new window)

12.
Dunn, J.G. and Chamberlain, A.C. (1997) The recovery of gold from refractory arsenopyrite concentrates by pyrolysis-oxidation. Minerals Engineering, 10, 919-928. crossref(new window)

13.
Ghosh, M.K., Das, R.P., and Biswas, A.K. (2002) Oxidative ammonia leaching of sphalerite part Ⅰ: noncatalytic kinetics. International Journal of Mineral Processing, 66, 241-254. crossref(new window)

14.
Han, O., Kim, B.J., Cho, K.H., Choi, N.C., and Park, C.Y. (2014) Selective Phase Transformation of Arsenopyrite by Microwave Heating and their Enhancement Au Recovery by Thiocyanate Solution. Journal of Mineralogical Society of Korea, 27, 73-83 (in Korea with English abstract). crossref(new window)

15.
Haque, K.E. (1999) Microwave energy for mineral treatment processes-a brief review. International Journal of Mineral Processing, 57, 1-24. crossref(new window)

16.
Hu, G., Dam-Johansen, K., Wedel, S., and Hansen, J.P. (2006) Decomposition and oxidation of pyrite. Progress in Energy and Combusion Science, 32, 295-314. crossref(new window)

17.
Huang, J.H. and Rowson, N.A. (2002) Hydrometallurgical decomposition of pyrite and marcasite in a microwave field. Hydrometallurgy, 64, 169-179. crossref(new window)

18.
Jones, D.A., Lelyveld, T.P., Mavrofidis, S.D., and Kingman, S.W. (2002) Microwave heating applications in environmental engineering-a review. Resources, Conservation and Recycling, 34, 75-90. crossref(new window)

19.
Kim, B.J., Cho, K.H., Choi, N.C., and Park, C.Y. (2013) The Geochemical Interpretation of Phase Transform and Fe-leaching Efficiency for Pyrite by Microwave Energy and Ammonia Solution. Journal of Mineralogical Society of Korea, 26, 139-150 (in Korea with English abstract). crossref(new window)

20.
La Brooy, S.R., Linge, H.G., and Walker, G.S. (1994) Review of gold extraction from ores. Minerals Engineering, 7, 1213-1241. crossref(new window)

21.
Ma, S.J., Luo, W.J., Mo, W., Su, X.J., Liu, P., and Yang, J.L. (2010) Removal of arsenic and sulfur from a refractory gold concentrate by microwave heating. Minerals Engineering, 23, 61-63. crossref(new window)

22.
Music, S., Popovic, S., and Ristic, M. (1992) Thermal decomposition of pyrite. Journal of Radioanalytical and Nuclear Chemistry, 162, 217-226. crossref(new window)

23.
Olubambi, P.A., Potgieter, J.H., Hwang, J.Y., and Ndlovu, S. (2007) Influence of microwave heating on the processing and dissolution behaviour of low-grade complex sulphide ores. Hydrometallurgy, 89, 127-135. crossref(new window)

24.
Omran, M., Fabritius T., Elmahdy, A., Abdel-Khalek, N.A., El-Aref, M., and El-Hamis Elmanawi. (2014) Effect of microwave pre-treatment on the magnetic properties of iron ore and its implications on magnetic separation. Separation and Purification Technology, 136, 223-232. crossref(new window)

25.
Pickles, C.A. (2009a) Microwaves in extractive metallurgy: part 1-review of fundamentals. Minerals Engineering, 22, 1102-1111. crossref(new window)

26.
Pickles, C.A. (2009b) Microwave in extractive metallurgy: part2-a review of applications. Minerals Engineering, 22, 1112-1118. crossref(new window)

27.
Prasad, M.S., Mensah-Biney, R., and Pizarro, R.S. (1991) Modern trends in gold processing-overview. Minerals Engineering, 4, 1257-1277. crossref(new window)

28.
Rao, K.S. and Ray, H.S. (1998) A new look at characterisation and oxidative ammonia leaching behaviour of multimetal sulphides. Minerals Engineering, 11, 1011-1024. crossref(new window)

29.
Ubaldini, S., Piga, L., Fornari, P., and Massidda, R. (1996) Removal of iron from quartz sand: a study by column leaching using a complete factorial drsign. Hydrometallurgy, 40, 369-379. crossref(new window)

30.
Uslu, T., Atalay, U., and Atol, A.I. (2003) Effect of microwave heating on magnetic separation of pyrite. Colloids and Surface, 225, 161-167. crossref(new window)

31.
Waters, K.E., Rowson, N.A., Greenwood, R.W., and Williams, A.J. (2007) Characterising the effect of microwave radiation on the magnetic properties of pyrite. Separation and Purification Technology, 56, 9-17. crossref(new window)

32.
Znamenackova, I., Lovas, M., Mockovciakova, A., Jakabsky, S., and Briancin, J. (2005) Modification of magnetic properties of siderite ore by microwave energy. Separation and Purification Technology, 43, 169-174. crossref(new window)