提高纯钙线钙收得率的研究

Study on improving calcium yield of pure calcium wire

通过理论分析和生产实践研究了影响纯钙线Ca收得率的因素,结果表明:1)减少喂丝导管直径能够减小钙线的偏转和盘圈的问题;2)钙的有效吸收区间为包底以上0.3 m至液面下1.22 m;3)钙线的喂线速度受到钙线铁皮厚的影响,不同铁皮厚度的钙线对应一最佳喂线速度;4)在氩气泡循环流的下降流位置喂线时,钙的收得率优于在氩气泡循环流的上升流位置;5)无缝钙线的Ca收得率高于有缝钙线;6)钢液成分影响到钙的蒸气分压,钙的有效吸收区间有所不同,钙在钢液中的停留时间也不同。

The factors affecting the calcium yield of pure calcium wire were studied through theoretical analysis and production practice.The results show that,1)Reducing the diameter of feeding tube can reduce the deflection of and the pilling up of calcium wire;2)The effective absorption range of calcium is from 0.3 m above the bottom to 1.22 m below the liquid level;3)The feeding speed of calcium wire is affected by the algam thickness of calcium wire,and the calcium wire with different algam thickness has an optimal feeding speed;4)When feeding wire at the downward flow position of argon bubble flow,the calcium yield is better than that at the upward flow position of argon circulation flow;5)The calcium yield of wire packing with seamless is better than that with slit algam tube;6)The composition of molten steel affects the vapor partial pressure of calcium,the effective absorption range of calcium is changed,and then the residence time of calcium in molten steel is different.