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PRELIMINARY STUDY ON THE PHASE RELATION IN THE COKE-BED ZONE (BASIC SOUTH AFRICAN ORE)
Abstract
Investigations on coke-bed relations with acidic manganese ores have been reported number of times. The correlation between the mineralogy, property, reactivity of the ore and the products during the production of high carbon ferromanganese have been reported. A theoretical study has proven that the energy consumption of different basic South African manganese ores were very dependent on the chemical composition of the feed. This has a direct impact on the phases that form in the prereduction, reduction and consequently the coke-bed zone. In the present study high grade manganese ore was subjected to the reduction in presence of coke and subsequent phases formed identified. The temperature range investigated was 1400°C, 1450°C, 1470°C and 1485°C. Al2O3 and SiO2 were used as fluxes to adjust the basicity from 1.25 down to 1. The ore and fluxes were mixed and milled together for 15 minutes to obtain a homogeneous feed. A alumina vertical tube furnace was used for the experiments. The head sample and products were characterized using XRF, XRD and SEM/EDS to identify phases that formed in the coke-bed. Preliminary results showed poor immiscibility between metal and slag for all temperatures, but at 1400°C the separation was much better compare to the other temperatures. Results reveal that at 1400°C, in the metallic phase 71.8% and 16.8% of Mn and Fe respectively whereas in the slag 25.56%, 0.6377%, 50.93% and 1.24% of CaO, MgO, MnO and FeO respectively.
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References8
Wa Kalenga M.K., Xiaowei P., Merete T., Manganese Alloys Production: IMPACT of Chemical compositions of raw materials on the energy and materials balance. The thirteenth International Ferroalloys Congress, June 9 - 13, 2013, Almaty, Kazakhstan pp 647 – 653
Sitefane M., Name2 S. T., Complete Title of the paper, International Scientific Event, Country, vol. 3, pp 185-193, 2018.
Pochart, G., Joncourt, L., Touchard, N. and Perdon, C. Metallurgical benefit of reactive high grade ore in manganese alloys manufacturing. International Ferroalloys Conference (Infacon XI), February 18 – 21, New Dheli/ India; Proceedings, pp 218-230, 2007.
Grischenk, S.G. Comparative study of features of partial solid phase metaling of manganese by thermal treatment of different types of manganiferous raw materials. The thirteenth International Ferroalloys Congress, June 9 - 13, 2013, Almaty, Kazakhstan pp 637 – 646
Ishak R. and Merete T., Degree of Prereduction without Coke consumption in Industrial Furnaces, International Ferroalloys Conference (Infacon XI), February 18 – 21, New Dheli/ India; Proceedings, pp 268-280, 2007.
Shin, H.K., Lee, B.D., Lee H.S. and Lee, Y.E. Mechanism of carbothermic reduction of Mn oxide powder. The thirteenth International Ferroalloys Congress, June 9 - 13, 2013, Almaty, Kazakhstan pp 621 – 635
Kumar, M., Rnganathan, S. and Sinha, SN. Kinetics of different manganes ores. International Ferroalloys Conference (Infacon XI), February 18 – 21, New Dheli/ India; Proceedings, pp 241-246, 2007.
Visser, M., Smith, H., Tigdalen, E. and Tangstad, M. Properties of Nchwaning and Gloria ore in the production of Mn ferro-alloys. The thirteenth International Ferroalloys Congress, June 9 - 13, 2013, Almaty, Kazakhstan pp 553 – 565
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