Production Practice on Control of Purity for Cord Steel in Pangang
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摘要: 帘线钢对钢水纯净度要求极高,是线材生产难度较大的产品之一,对钢中的[S]、[N]、[O]、[Ti]等的控制要求极严。攀钢提钒炼钢厂采用含有[V]、[Ti]的铁水炼钢,铁水热源不足,[P]、[S]元素含量较高,导致帘线钢生产过程控制难度增大,采用铁水脱硫使入转炉半钢[S]控制在0.005%以下,延长提钒转炉吹氧时间3~5 min,能使入炼钢转炉半钢[Ti]达到0.003%以下,在转炉工序,控制吹炼终点氧活度以及在精炼LF工序采用合理的造渣工艺造渣、RH采取真空处理,能够稳定生产出符合GB/T 10561-2005规定要求的帘线钢。Abstract: Due to the extremely strict requirements on the control of [S],[N],[O] and [Ti] content in molten steel,tire cord steel is a kind of wire rods difficult to be produced. Pangang Vanadium Recovery and Steelmaking plant steelmake using hot metal with containing [V]and [Ti],the hot metal heat source is insufficient,and the elemente of [P]and [S]content is higher,so make the process of controlling cord steel production more difficult。Usually,using hot metal desulphurization control the content of [S] under 0.005%,though extending oxygen blowing time 3~5 min in the process of extract vanadium converter,can make the content of [Ti] below 0.003% in the semisteel,in the process of converter,controlling the end-point oxygen activity and the LF process refining using slag formation of reasonable slagging,RH vacuum treatment,can produce meetting the requirements of GB/T 10561-2005 steel cord.
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Key words:
- tire cord steel /
- molten steel /
- purity /
- hot metal pretreatment /
- converter smelting
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