Abstract
Effective recovery of titanium resources from titanium-bearing blast furnace slag had always been a difficult problem. In the present study, Ti5Si3 was synthesized via silicothermic reduction of titanium-bearing blast furnace slag. The effects of reduction temperature and reaction time on the formation of Ti5Si3 were studied by X-ray diffraction and scanning electron microscope. The results indicated that Ti5Si3 was the only silicide in the finally obtained products. Ti5Si3 will gradually sinter to form a porous skeleton, and a small amount of slag will be trapped in the porous skeleton of Ti5Si3. It provided a feasible route for the treatment of titanium-bearing blast furnace slag and the recovery of titanium resources. It was also found that the longer the reaction time and the higher the reaction temperature (1823 K), the less the slag trapped in the alloy will be.
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