Al Control in High Titanium Ferro with Low Oxygen Prepared by Thermite Reaction

Based on the pre-works, this paper proposed a new short stage process of the intensify aluminothermy reduction by the stage to prepare high titanium ferroalloy with low O and Al contents. We investigated the effects of Al and Ca and Si combination reduction agent, slag type and step-up reduction conditions on the Al content and distribution in the alloy. The results show that the step-up reduction can not only reduce effectively the oxygen content in the alloy, but also reduce effectively Al content. For instance, the oxygen content in high titanium ferroalloy is within 1%∼4%, and the Al content is within 1%∼5%. Its quality reaches the requirement of high titanium ferroalloy prepared by remelting process.