Decarburization by carbonate decomposition of CO2 in RH process
LIN Yang1,2，TANG Fu-ping3，SHEN Ming-gang1，WANG Xiao-feng2，TANG Wan-ru1，AI Xin-gang1
（1. School of Materials and Metallurgy，University of Science and Technology Liaoning，Anshan 114051，Liaoning， China 2. General Steelmaking Plant，Angang Steel Co.，Ltd.，Anshan 114009，Liaoning， China 3. Ansteel Group Corporation，Anshan 114009，Liaoning， China）
Abstract：An investigation on decarburization by carbonate decomposition of CO2 in RH process has been put forward. By means of spraying calcium carbonate powder into molten steel from the upper snorkel， the decarburization reaction and purifying molten steel were promoted. The decarburization mechanism of this novel technique has been analyzed. The industrial experiments have been carried out to investigate the variation of the cleanness of molten steel before and after the treatment. The results indicate that decarburization reaction took place after carbonate decomposition of CO2 decarburization treatment and decarburization process was accelerated， which led to shorten at least 3 min for the RH processing time and reduce 3-5 RMB for the production cost per ton steel.[w(T[O])]in the as-cast slab approached to 0.001 0% after non-oxygen promoting decarburization treatment， which improved the cleanness of the molten steel significantly.
林 洋，唐复平，沈明钢，王晓峰，唐琬茹，艾新港. RH碳酸盐分解CO2脱碳工艺[J]. 钢铁, 2016, 51(5): 37-40.
LIN Yang，，TANG Fu-ping，SHEN Ming-gang，WANG Xiao-feng，TANG Wan-ru，AI Xin-gang. Decarburization by carbonate decomposition of CO2 in RH process. Iron and Steel, 2016, 51(5): 37-40.
Yamaguchi K, Sakuraya T, Hamagami K. Development of Hydrogen Gas Injection Method for Promoting Decarburization of Ultra-low Carbon Steel in RH Degasser?R?. Kawasaki Steel Technical Report, 1995 ,25(32):33-34.
[2]
Yamaguchi K, Sakuraya T, Hamagami K. Development of Hydrogen Gas Injection Method for Promoting Decarburization of Ultra-low Carbon Steel in RH Degasser?R?. Kawasaki Steel Technical Report, 1995 ,25(32):33-34.
[3]
Dian-Qiao GENG, Hong LEI and Ji-Cheng HE. Effect of Traveling Magnetic Field on Flow, Mixing, Decarburization and Inclusion Removal during RH Refining Process?J?.ISIJ,2012,52(6):1036-1037.
[3]
Dian-Qiao GENG, Hong LEI and Ji-Cheng HE. Effect of Traveling Magnetic Field on Flow, Mixing, Decarburization and Inclusion Removal during RH Refining Process?J?.ISIJ,2012,52(6):1036-1037.
Wei J H,Yu N W, Fan Y etal. Study on Flow and Mixing Characteristics of Molten Steel in RH and RH-KTB Refining Processes?J?. Journal of Shanghai University, 2002, 6(2): 167-168.
[5]
Wei J H,Yu N W, Fan Y etal. Study on Flow and Mixing Characteristics of Molten Steel in RH and RH-KTB Refining Processes?J?. Journal of Shanghai University, 2002, 6(2): 167-168.
[6]
Jiongming ZHANG, Liang LIU, Xinyu ZHAO, Shaowu LEI and Qipeng DONG. Mathematical Model for Decarburization Process in RH Refining Process?J?.ISIJ,2014,54(7):1560-1562.
[6]
Jiongming ZHANG, Liang LIU, Xinyu ZHAO, Shaowu LEI and Qipeng DONG. Mathematical Model for Decarburization Process in RH Refining Process?J?.ISIJ,2014,54(7):1560-1562.
[7]
Park Y G, Doo W C,Yi K W , An S B. Numerical Calculation of Circulation Flow Rate in the Degassing Rheinstahl-Heraeus Process?J?. ISIJ inter, 2000,40 (8):74-75.
[7]
Park Y G, Doo W C,Yi K W , An S B. Numerical Calculation of Circulation Flow Rate in the Degassing Rheinstahl-Heraeus Process?J?. ISIJ inter, 2000,40 (8):74-75.
Koria S C, Dutta R. Study of the Effect of Some Process Parameters on Powder Injection Refining b y a Mathematical Model?J?. Scand. J. Metallurgy, 2000,29(8):259-260.
[10]
Koria S C, Dutta R. Study of the Effect of Some Process Parameters on Powder Injection Refining b y a Mathematical Model?J?. Scand. J. Metallurgy, 2000,29(8):259-260.
2016, Vol. 51 
