Effect of Oxygen Blowing Parameters on the Performance of Ruhrstahl-Heraeus Refining Process

摘要

#8 Ruhrstahl-Heraeus is the first refining facility possessing the function of pressure control at China Steel (CSC), which can be used to evaluate the optimal vessel vacuity during the period of oxygen blowing. In this study the experiments were conducted at different pressures during oxygen blowing for decarburization and temperature raising processes. It was observed that increasing vessel pressure during oxygen blowing had an adverse effect on decarburization but a high vacuum period still dominated the result of the whole reaction. After adequate treatment each RA[C] could reach a level of less than 15 ppm for a vessel pressure of 90 to 195 mbar. The pressure tests were also conducted for the operation of temperature elevation and the results showed that they all achieved the expected level. The influences of the height of the top lance were also evaluated in this study. It was found that each RA[C] could reach a level of less than 15 ppm and the performance of the temperature elevation also met the requirement for regular operation for a height of 550 to 650 cm. Accordingly, it is feasible to reduce splashing by adjusting vessel pressure and the height of the top lance depending on the situation so as to mitigate the damage to the RH facility.