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| Deep Desulphurization of High Grade Non-Oriented Electrical Steel in RH Process |
| QIN Zhe1,LIAO Jian-jun1,2 ,ZHOU Jian-feng3,XIAO Yue-qi3,QIU Sheng-tao1,ZHOU Ming-wei2 |
1. National Engineering Research Center of Continuous Casting Technology， China Iron and Steel Research Institute Group， Beijing 100081， China
2. Faculty of Metallurgical and Chemical Engineering， Jiangxi University of Science and Technology， Ganzhou 341000， Jiangxi， China
3. Technology Center of Liangang Group, Lianyuan Iron and Steel Corporation of Hunan Hualing, Loudi 417009, Hunan, China |
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Abstract The industrial trials on deep desulphurization of high grade non-oriented electrical steel were finished through using CaO-CaF2 complex based fluxes in RH process. Using the KTH model, the effect of refining slag composition on the sulfide capacities was analyzed. The results show that the chemical composition of refining slag (mass fraction,%) is w((CaO/ SiO2)) between 5 to 7, w((CaO))/w((Al2O3)) beween 1.5 to 1.8, w((Al2O3)) between 25% to 30%,w（(FeO+MnO)）less than 5%, and the desulphurizer addition level of 6～8kg/t can desulphurize mass fraction the liquid steel from average 0.0031% to 0.0018%, and the highest and average desulphurization ratios are 47.1% and 41.7%, respectively.
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Received: 02 August 2013
Published: 20 February 2014
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2014, Vol. 49 
