EFFECT OF Al_2O_3 ON PRECIPITATION BEHAVIOR OF PHOSPHORUS ENRICHMENT PHASE IN DEPHOSPHORIZATION SLAG

摘要

The precipitation behavior of phosphorus enrichment phase was investigated by slag modification with Al_2O_3. The mineral phase of the original slag and modified slags were measured by mineral phase microscope, SEM+EDS and XRD. The mechanism of Al_2O_3 modification was discussed according to the thermodynamic theory analysis software (Factsage version 6.3). The results show that the high phosphorus solid solution (n'2CaO·SiO_2-3CaO·P_2O_5) was generated by the continuous reaction of nC_2S-C_3P (n'