Practice of deep dephosphorization in 100 t converter at shouqin metal materials Co., Ltd.
Based on analyzing the dephosphorization mechanism and slag phase,taking the dephosphorization production of 100 t converter in Shouqin Metal Materials Co.,Ltd.as an example,the deep dephosphorization capability was studied under several dephosphorizing processes such as the duplex melting of converter,the dephosphorizing and decarbonizing oxygen lance,the smelting plus tapping and the triple slag.The practices showed that the dephosphorization rate of the smelting plus tapping dephosphorization process was the highest,even to 97.5 ％ and the phosphorus content of the steel after dephosphorizing could reduced to 0.002 ％.The triple slag process was most suitable for production condition of Shouqin Metal Materials Co.,Ltd.,by which the dephosphorization rate came up to 96.7 ％ under the phosphorus content of 0.150 ％ in hot metal and the cost of smelting could be decreased efficiently.
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