Study on Phosphorus Microscopic Enrichment Regularity of Earlier and Final Slag in Double –slag Steelmaking

C. X. Li, H. Li, H. Lu, W. W. Mao: State key laboratory of advanced Metallurgy, University of Science and Technology Beijing, China This work examined phosphorus enrichment in different micro areas of the earlier slag and the final slag in converter double-slag technology. The results show that: phosphorus has high enrichment in the micro-area the basictity of which is between 2 to 2,5; the phosphorus content is at a higher point in the micro area with a silicon (Si) content of 9 % ~ 12 % in the final slag or 13 % ~ 14 % in the earlier slag; phosphorus can reach the maximum value when the ferrum content is between 5 % ~ 9 %, higher phosphorus content appears in the micro zone with a low magnesium content.