Effects of Activated Carbon in Microwave Induction of Lateritic Ore

Abstract:

Lateritic ore can be heated and deoxidized rapidly via microwave irradiation with activated carbon as deoxidizer. In this paper, we studied the reductive roasting behavior of carbon-containing lateritic ore in microwave field and the composition of products through different heating process with varying carbon content. The results show that the heating process of the lateritic ore is a thermally stable process. The reductive level of lateritic ore can be adjusted by changing the proportion of carbon powders and the heating time of microwave irradiation. During this reductive roasting process, the quality of the added carbon powders will make a great impact on the phase composition of the product and then affect the heating rate. The reductive calcite product mainly consists of magnetite and wastage. With the rising of the content of reducing agent, the reductive level of lateritic ore will increase, which cause Ni and a small quantity of Fe to be deoxidized and forms Ni-Fe alloy.

• Periodical: Applied Mechanics and Materials (Volume 372)
• Pages: 433-436
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.372.433
• Online since: August 2013
• Authors: He Chen, Rui Guo, Na Su, Yue Hong Zhang, Xuan Wen Liu
• Keywords: Activated Carbon, Laterite, Microwave, Reductive Roasting

References

[1] Dalvi A D, Bacon W G. Past and future of nickel laterite projects [A]. International Laterite Nickel Symposium-2004[C]. Charlotte, North Charolina, U.S.A., 2004, 23-27.

[2] Warner A E M, Diaz C M, Dalvi A D, Mackey P J, Tarasov A V. JOM world nonferrous smelter survey part 3, nickel, laterite [J]. JOM, 2006, April: 11-20.

DOI: 10.1007/s11837-006-0209-3

[3] Warner A E M, Diaz C M, Dalvi A D, Mackey P J, Tarasov A V, Jones R T. JOM world nonferrous smelter survey part 4, nickel, sulfide [J]. JOM, 2006, April: 58-62.

DOI: 10.1007/s11837-007-0056-x

[4] Mourao M B, Carvalho I P, Takano C. Carbothermic reduction by microwave heating [J]. ISIJ International, 2001, 41(Supplement): S27-S30.

DOI: 10.2355/isijinternational.41.suppl_s27

[5] Pickels C A. Microwave reduction of nickeliferous silicate laterite ores [C]. Nickel and Coabalt 2005, Challenges in Extraction and Production. Calgary, Alberta, Canada: Donald J, Schonewille R. 2005: 285-304.

[6] Stabdish N, Huuang W. Microwave application in carbothermic reduction of iron ores [J]. ISIJ International. 1991, 31(3): 241-245.

DOI: 10.2355/isijinternational.31.241

[7] Xu Yanbin, Xie Yanting, Yan Lan, Yang Rudong. A new method for recovering valuable metals from low-grade nickeliferous oxide ores [J]. Hydrometallurgy, 2005, 80: 280-285.

DOI: 10.1016/j.hydromet.2005.08.007

[8] Sist C, Demopoulos G P. Nickel hydroxide precipitation from aqueous sulfate media [J]. JOM, 2003, August: 42-46.

DOI: 10.1007/s11837-003-0104-0

[9] Mackenzie M, Virnig M, Feather A. The recovery of nickel from high pressure acid leach solutions using mixed hydroxide product- LIX84-INS technology [J]. Minerals Engineering, 2006, 19: 1220-1233.

DOI: 10.1016/j.mineng.2006.01.003

[10] Johnson J A, McDonald R G, Muir D M, Tranne J P. Pressure acid leaching of arid-region nickel laterite ore part Ⅳ: effect of acid loading and additives with nontronite ores [J]. Hydrometallurgy, 2005, 78: 264-270.

DOI: 10.1016/j.hydromet.2005.04.002