Experiment Research on Deep Desulphurization of Non-oriented Electrical Steel

Liao Jianjun; Qin Zhe; Qiu Shengtao; Lai Chaobin

doi:10.7513/j.issn.1004-7638.2013.06.012

Volume 34 Issue 6

Dec. 2013

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Liao Jianjun, Qin Zhe, Qiu Shengtao, Lai Chaobin. Experiment Research on Deep Desulphurization of Non-oriented Electrical Steel[J]. IRON STEEL VANADIUM TITANIUM, 2013, 34(6): 54-59. doi: 10.7513/j.issn.1004-7638.2013.06.012

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Liao Jianjun, Qin Zhe, Qiu Shengtao, Lai Chaobin. Experiment Research on Deep Desulphurization of Non-oriented Electrical Steel[J]. IRON STEEL VANADIUM TITANIUM, 2013, 34(6): 54-59. doi: 10.7513/j.issn.1004-7638.2013.06.012

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Experiment Research on Deep Desulphurization of Non-oriented Electrical Steel

doi: 10.7513/j.issn.1004-7638.2013.06.012

1. Faculty of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;
2. National Engineering and Research Center of Continuous Casting Technology, CISRI, Beijing 100081, China

Received Date: 2013-03-27
Available Online: 2023-12-04

Abstract

Abstract

In order to satisfy the requirements of consumers on sulfur content in non-oriented electrical steel,taking(CaO-CaF 2) based flux as desulfurizer,industrial experiments on deep desulphurization of non-oriented electrical steel were carried out during RH process. The results show that as the compositions of refining slag are appropriately controlled with w_CaO of 43%~51%,w_Al₂O₃ of 25%~31%,w_MgO of 4%~6%,w_SiO₂ of 9%~12%,and w_{(FeO + MnO)} of 3%~6%,and the desulfurizer added are at 6~8 kg/t,the average sulfur content in liquid steel can be reduced from 32 × 10^-6 to 18 × 10^-6 with the average and highest desulphurization degrees of 43.3% and 47.1% respectively. Calculated with KTH model,the average sulfide capacity in final slag is 0.0031,and the average equilibrium distribution ratio of sulphur in the final slag increases from 14 to 52 at the end of refining in RH.
- non-oriented electrical steel,
- RH,
- deep desulfurization,
- refining slag,
- sulfide capacity,
- sulfur distribution

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