Model for RuhrstahI-Heraeus （RH） decarburization process  

作　　者：Dong-ping Zhan Yang-peng Zhang Zhou-hua Jiang Hui-shu Zhang 

机构地区：[1]School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China [2]Shenyang Northeastern Institute of Metal Materials Co., Ltd., Shenyang 110108, Liaoning, China [3]School of Materials Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China [4]Metallurgical Engineering College, Liaoning Institute of Science and Technology, Benxi 117004, Liaoning, China

出　　处：《Journal of Iron and Steel Research International》2018年第4期409-416,共8页

基　　金：The authors would like to acknowledge the National Natural Science Foundation of China （51574063）, Funda- mental Research Funds for the Central Universities （N150204012, N152306001）, and Program for Liaoning Excellent Talents in University （LJQ2015056）.

摘　　要：A mathematical model was established to predict the carbon content of ultralow carbon steel in the Ruhrstahl-Heraeus （RH） process. The model was solved using the fourth-order Runge-Kutta method and assumed that the volume of steel partaking in the reaction depends on the decarburization mechanism. After analyzing the decarburization process using the proposed model, the following conclusions were drawn. First, the initial carbon and oxygen contents in the RH degasser should be stabilized in the range of （200-350） × 10^-6 and （500-700） × 10^-6, respectively. Second, in the initial stage, the pressure should be reduced as quickly as possible. Third, oxygen blowing should begin as early as possible when the forced decarburization is needed and the minimum oxygen flow rate should be 0.1923 m3/（t rain）. Finally, expanding the diameter of the snorkel tube from 480 to 600 mm clearly enhances the decarburization rate.A mathematical model was established to predict the carbon content of ultralow carbon steel in the Ruhrstahl-Heraeus （RH） process. The model was solved using the fourth-order Runge-Kutta method and assumed that the volume of steel partaking in the reaction depends on the decarburization mechanism. After analyzing the decarburization process using the proposed model, the following conclusions were drawn. First, the initial carbon and oxygen contents in the RH degasser should be stabilized in the range of （200-350） × 10^-6 and （500-700） × 10^-6, respectively. Second, in the initial stage, the pressure should be reduced as quickly as possible. Third, oxygen blowing should begin as early as possible when the forced decarburization is needed and the minimum oxygen flow rate should be 0.1923 m3/（t rain）. Finally, expanding the diameter of the snorkel tube from 480 to 600 mm clearly enhances the decarburization rate.

关 键 词：RH MODEL Carbon content Fourth-order Runge-Kutta Ultralow carbon steel DECARBURIZATION 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构] TQ127.11[自动化与计算机技术—计算机科学与技术]