Effect of Technological Conditions on Phosphorous Enrichment during Melting Adjusting Process of Converter Slag

摘要

The effects of adjusting technology on the phosphorous enrichment in converter slag were investigated. The results showed that the grain size of 2CaO·SiO_2 with high phosphorus containing content increased slightly with the decreasing of cooling rate, and the proper cooling rate was confirmed to be about 1.0°Cmin~(-1). Moreover, the morphology of the phosphorus-rich phase of 2CaO·SiO_2-3CaO·P_2O_5 was changed from granular for the higher basicity of converter slag to the coexistence of granular shape and rod-like for the lower basicity of adjusted slag. With the addition of adjusting agent such as SiO_2 to lower the basicity of converter slag, the phosphorus in converter slag could be transferred into 2CaO·SiO_2 phase effectively, and P_2O_5 content in high phosphorus containing phase reached to above 30%.