Experimental Study on High-phosphorus Hematite Gasification Dephosphorizing in Sintering Process

The effects of various factors on high-phosphorus hematite gasification dephosphorizing in sintering process were studied through pellet sintering.The results show that gasification dephosphorizing is mainly a gas-solid phase reaction process.Under low oxidizing atmosphere,the rate of high-phosphorus hematite gasification dephosphorizing increases when the increasing reaction temperature,reducing the basicity and extending the holding time.When the the content of dephosphorization agent is 6.8%,the optimal gasification dephosphorizing process parameter are as follows:carbon content 4%,reaction temperature 1 250℃,basicity 1.2,reaction holding time 30 min,and the resulting gasification dephosphorization rate can reach 23.8%.XRD microscopic detection on the finally calcined product confirmed the occurrence of gasification dephosphorization reaction.