IMPROVEMENT OF HOT METAL DEPHOSPHORIZATION EFFICIENCY TO DECREASE STEELMAKING SLAG GENERATION

摘要

To minimize steelmaking slag, increase of hot metal dephosphorization treatment ratio is important. At Nippon Steel, the hot metal dephosphorization process is changing from the injection process to treatment using top-and-bottom-blowing converters. This process can reduce the amount of steelmaking slag. In addition, as low basicity slag without fluorspar is formed, the restrictions on slag use are reduced.