Carbothermal reduction products were analzed by using scanning electron microscopy (SEM/EDS).
📌 3 Maddede Bu Makale
🎯
Amaç & Hipotez:The carbothermal reduction of mechanically activated chromite with metallurgical coke under an argon atmosphere was investigated at temperatures between 1100 and 1400°C and the effects of the mechanical activation on chromite structure were analyzed by x-ray diffraction (XRD) and scanning electron microscopy (SEM).
📊
Temel Bulgular & Veri:An increase in specific surface area resulted in more contact points.
💡
Sonuç & Katkı:Carbothermal reduction products were analzed by using scanning electron microscopy (SEM/EDS).
The carbothermal reduction of mechanically activated chromite with metallurgical coke under an argon atmosphere was investigated at temperatures between 1100 and 1400°C and the effects of the mechanical activation on chromite structure were analyzed by x-ray diffraction (XRD) and scanning electron microscopy (SEM). An increase in specific surface area resulted in more contact points. The activation procedure led to amorphization and structural disordering in chromite and accelerated the degree of reduction and metalization in the mixture of chromite and metallurgical coke. Carbothermal reduction products were analzed by using scanning electron microscopy (SEM/EDS).
H.M. Mikami, Industrial Minerals and Rocks, fifth ed., Vol.1, AIME, New York, 1983.
K.K. Chatterjee, Uses of Metals and Metallic Minerals, New Age Int. Ltd Pub., New Delhi, 2007.
G. Yarkadaş, K. Yildiz, Effects of mechanical activation on the soda roasting of chromite, Can. Metal. Quarterly 48(1), 69-72, 2009.
P. Weber, R.H. Eric, The reduction of chromite in the presence of silica flux, Minerals Eng. 19, 318-324, 2006.
Y.L. Ding, N.A. Warner, Catalytic reduction of carbonchromite composite pellets by lime, Thermochimica Acta 292, 85-94, 1997.
A. Atasoy, Mineral processing and reduction of Turkish chromite ore, PhD Thesis, UMIST, 2001.
A.R. Barnes, C.W.P. Finn, S.H. Algie, Prereduction and smelting of chromite concentrate of low chromium to iron ratio, J. South African Inst. of Min. And Metal. 83(3), 49-54, 1983.
G.W. Healy, Carbon reduction of chromites in Bird River and other ores and concentrates at 1200-1700°C, Can. Metal. Quarterly 27(4), 281-285, 1988.
R.H. Nafziger, J.E. Tress, J.I. Paige, Carbothermic reduction of domestic chromites, Metallurgical Transactions B 10B(1), 5-12, 1979.
O. Soykan, R.H. Eric, R.P. King, Reduction mechanism of a natural chromite at 1416°C, Metallurgical Transactions B 22(1), 53-63, 1991.
O. Soykan, R.H. Eric, R.P. King, Kinetics of the reduction of Bushveld complex chromite ore at 1416°C, Metallurgical Transactions B 22(6), 801-810, 1991.
A.B. Hazar-Yoruc, Reduction mechanism of chromite spinel with carbon, Minerals and Metal. Proces. 24(2), 115-120, 2007.
P. Balaz, Extractive Metallurgy of Activated Minerals, Elsevier Science, Amsterdam, 2000.
P. Balaz, Mechanochemistry in Nanoscience and Minerals Engineering, Springer Verlag, Berlin, 2008
Y. Chen, T. Hwang, M. Marsh, J.S. Williams, Study on mechanism of mechanical activation, Materials Science and Engineering A 226-228, 95-98, 1997.
D. Tromans, J.A. Meech, enhanced dissolution of minerals: stored energy, amorphism and mechanical activation, Minerals Engineering 14(11), 1359-1377, 2001.
D. Tromans, J.A. Meech, Enhanced dissolution of minerals: microtopography and mechanical activation, Minerals Engineering 12(6), 609-625, 1999.
A. Atasoy, F.R. Sale, An investigation on the solid state reduction of chromite concentrate, J. Solid State Phenomena 147-149, 752-757, 2009.