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| Control of Sulfur Content in the Production of Rail Steel |
| YANG Sen-xiang1，HUANG De-sheng1，ZENG Jian-hua2 |
（1． Panzhihua Steel and Vanadium Co．， Ltd．， Pangang Group， Panzhihua 617062， Sichuan， China
2． Panzhihua Iron and Steel Research Institute， Pangang Group， Panzhihua 617000， Sichuan， China） |
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Abstract There are more advanced requests on steel cleanness and shape control of non-metallic inclusions for producing rail steel．According to the smelting situations of hot metal with high sulphur content at Panzhihua Steel，technologies for controlling the sulfur content during hot metal pretreatment，converter smelting，and second refining are developed．Technologies in clean steelmaking such as increasing the cleanness of steel，quantity and shape control of non-metallic inclusions are formed．Rail steel at a speed of 350km/h has been produced．As for the high speed rail steel，over 95% of the steel has the w(［S］)≤0.008%，the content of w(T［O］) deceases to below 0.001 5%，and the distribution and shape of inclusions are controlled effectively．
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Received: 26 April 2013
Published: 28 March 2014
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2014, Vol. 49 
