Abstract:The technological characteristics of topblown converter caused by the some unfavorable factors, such as the higher mass fraction of FeO in converter final slag. In order to solve the problem, the idea of using the carbonaceous material as the slag deoxidation agent was proposed by studying the principle of the carbon deoxidization, which can reduce ferric oxide in the slag by the carbonaceous material. In the industrial test, 1.22.2 kg/t carbonaceous material was added in per ton steel, which was uniformly added on the slag surface during the BOF tapping with the residual steel varying from 1/2 to 1/4. The results showed the carbonaceous material had good use effect in the slag deoxidation, and can substitute for aluminum with the ratio of 2∶1, which can obtain obvious economic benefit and reduce the production cost.