Mn_3O_4 분진으로부터 고순도 훼로망간 제조에 관한 연구

초록

In order to make high-purity ferro-manganese from Mn_3O_4 waste dust, the application of aluminothermite process to the reduction of the waste dust was investigated. The mixture from Mn_3O_4 dust as metallic source and Al metal powder as the reductant ignited, and reduced with an extremely intense exothermic reaction. The rapid propagation of the aluminothermite reaction occurred spontaneously and stably by ignition of the mixture. The Manganese having some alloy elements emerged as liquids due to the high temperatures reached up to about 2,500°C and separated from the liquid by their differences of specific gravity. The result of thermite reaction showed the fact that can be obtained high purity ferro-manganese which have over about 90% of manganese content and lower impurities such as C, P, S than those of KS D3712 specification. The recovery of manganese from Mn3O4 dust was lower level of about 65% than about 75% from manganese ore by electric furnace process,that is due to spatter loss because of its extremely intense thermite reaction. But it will be improved by the process designed to provide CaO as the cooler or to use the Al metal powder having larger particle size distribution.

키워드