A STUDY ON THE BEHAVIOUR OF GALLIUM IN THE IRONMAKING PROCESS |
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| Authors: | LSavov SGaronin OIvanov YSYusfin DJanke |
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| Affiliation: | 1. Institute of Iron and Steel Technology, Freiberg University of Mining and Technology, D-09596 Freiberg, Germany
2. Moscow State Institute of Steel and Alloys (MISIS), 4 Leninsky Prospekt, 117936 Moscow, Russia |
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| Abstract: | Gallium is a valuable rare metal which is mainly being used in the production of GaAs. The demand for gallium is increasing but production is limited since gallium is extracted only as a by-product of bauxite processing. On the other hand coal, ironmaking coke and iron ore gangue contain traces of gallium. However little is known about the behaviour of gallium in ironmaking. The aim of the study is to clarify the distribution of gallium between hot metal, slag and top gas by means of laboratory experiments. It was found that Ga2O3 is not stable in blast furnace slags and that gallium is retained in hot metal. Vacuum distillation experiments with hot metal showed that gallium is not transferred to the gas phase. Data on the input and output of gallium at two industrial blast furnaces, as well as chemical analyses of the gallium content of several cokes are presented, too. |
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| Keywords: | gallium thermodynamics ironmaking blast furnace coke |
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