Then, in order to achieve a good application effect, what details should be paid attention to when operating the cored wire.
1, reasonable adjustment of feeding speed. Feed line speed has a greater impact on Ca absorption rate, too fast and too slow will lead to lower absorption rate. Cored wire fed into a certain depth when the melting begins, the depth should ensure that the melting dispersion of calcium bubbles by the greater static pressure of steel, prompting it to float to the surface of the liquid steel before the complete consumption as far as possible.
The appropriate feeding speed can improve the calcium yield. If the speed is too fast, on the one hand, due to the local production of a large number of calcium vapour will make the liquid steel violently fluctuating, a large number of calcium vapour directly volatilized into the air; on the other hand, the calcium vapour can not be dissolved in time and a large number of upward floating, thus reducing its yield. On the other hand, if the speed is too slow, it will lead to insufficient feeding depth, before it can be completely dissolved in the liquid steel, it will float to the surface of the liquid steel and waste.
2, the correct choice of feeding line position. Feed line position for calcium recovery rate also has a great impact, solid core pure calcium line feeding point should be selected in the liquid steel downstream of the centre, as far as possible away from the bright circle of argon blowing, so that no matter whether Ca is in the gas state or liquid state into the liquid steel, will be forced to decline under the action of the downstream flow, so as to prolong its stay in the liquid steel, so that it is fully absorbed by the molten steel.
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