Technology for processing steel liquid calcium by adopting hard high-purity calcium wire
A technology of calcium treatment and calcium wire, which is applied in the field of steelmaking, can solve the problems of cleanliness control, large consumption, and low recovery rate of calcium element, so as to reduce the ratio of set holes, realize stable control, and solve splashing problem effect
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Embodiment 1
[0013] Steel type D32-1, ladle capacity 100t, smelting process is to use pure calcium wire for calcium treatment after ladle furnace refining. High-quality high-purity calcium line for calcium treatment process:
[0014] The inner core of the pure calcium wire adopts high-density solid pure calcium rod, the calcium content is 96%, and the thickness of the steel strip is 1.2mm;
[0015] The process parameters of the wire feeding process are controlled as follows: the feeding speed of the hard high-purity calcium wire is controlled at 1.50m / s; the calculated feeding depth is 30cm from the deepest point where the calcium wire reaches the ladle to the bottom of the ladle; the temperature of the molten steel at the end of refining is 1580°C.
[0016] After this process, the Ca content in the steel after feeding the line is 0.0018%, and the recovery rate of calcium element is 42%. The process of calcium treatment is stable, and the problem of splashing is solved. 54 furnaces are pr...
Embodiment 2
[0018] Steel type X70, ladle capacity 100t, smelting process is RH vacuum refining and then using pure calcium wire for calcium treatment process, after RH vacuum refining, the Ca content in the steel is 0.0020%, and the amount of wire feeding is 0.55m / (t steel) hard High-purity calcium line for calcium treatment process:
[0019] The inner core of the pure calcium wire adopts high-density solid pure calcium rod, the calcium content is 96%, and the thickness of the steel strip is 1.2mm;
[0020] The process parameters of the wire feeding process are controlled as follows: the feeding speed of the hard high-purity calcium wire is controlled at 1.50m / s; the calculated feeding depth is 25cm from the deepest point where the calcium wire reaches the ladle to the bottom of the ladle; the temperature of the molten steel at the end of refining is 1583°C.
[0021] After this process, the Ca content in the steel after feeding the line is 0.0020%, and the recovery rate of calcium elemen...
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