Technology Development of Tuyere Coke Powder-O{sub}2 Injection System for Carbon Pick-up in Cupola

摘要

This study established the cupola technology of tuyere injection of coke powder and oxygen enrichment for raising the carbon level in the tap iron melt. The primary objective was to achieve the flexibility of varying the ratio between the steel scrap and pig iron in the charge materials, while still can obtain the desired chemistries of the iron melt. The effects of selected processing and metallurgical parameters, including the injection rate of the coke powder, air blow rate, % oxygen enrichment and ratio of steel scrap to pig iron, on the chemistries of the tap iron (especially the C content) were studied. Based upon the results obtained in this study, a database regarding the optimal operational conditions (e.g., injection rate of the coke powder and % oxygen enrichment) for achieving the desired chemistries of the tap iron was established.