Reasonable use of calcium-silicon cored wire can achieve a good deoxidation efficiency, thereby improving the quality of steel. In the development of recent years, the types of cored wires are developing in a diversified direction, which can meet various production and procurement needs of customers. Correct use of silicon-calcium cored wires can achieve good application results.
In terms of feed rate:
The feeding speed of the silicon-calcium cored wire has a great influence on the calcium absorption rate. Too fast or too slow will slow down absorption. When melting begins at the depth of the feed line, it should be ensured that the molten and dispersed calcium bubbles are exposed to larger molten steel. Static pressure makes it possible to consume as much molten steel as possible before reaching the level. Proper feeding rates can increase calcium recovery. If the speed is too high, on the one hand, due to the local generation of a large amount of calcium vapor, the molten steel becomes intense. When a large amount of calcium vapor evaporates directly in the air, on the other hand, the calcium vapor dissolves too late and floats in large quantities to reduce the recovery rate. On the contrary, if the speed is too slow, the filling depth is insufficient and it is easy to dissolve in molten steel. The former float on the level of molten steel and are wasted. Therefore, the use of silicon-calcium cored wire should maintain an appropriate feed rate.
Suitable location for feeding line:
The position of the silicon-calcium cored wire to the wire also has a great influence on the recovery rate of calcium. In the middle of the downward flow of the molten steel, the wire feeding point of the massive pure calcium wire should be selected, as far as possible away from the bright ring of the molten steel. No matter whether Ca is gaseous or liquid, the molten steel is forced to sink under the action of the downward flow. Thereby prolonging its residence time in molten steel and being completely absorbed by molten steel.
The feeding speed of the silicon-calcium cored wire has a great influence on the calcium absorption rate. Too fast or too slow will slow down absorption. When melting begins at the depth of the feed line, it should be ensured that the molten and dispersed calcium bubbles are exposed to larger molten steel. Static pressure makes it possible to consume as much molten steel as possible before reaching the level. Proper feeding rates can increase calcium recovery. If the speed is too high, on the one hand, due to the local generation of a large amount of calcium vapor, the molten steel becomes intense. When a large amount of calcium vapor evaporates directly in the air, on the other hand, the calcium vapor dissolves too late and floats in large quantities to reduce the recovery rate. On the contrary, if the speed is too slow, the filling depth is insufficient and it is easy to dissolve in molten steel. The former float on the level of molten steel and are wasted. Therefore, the use of silicon-calcium cored wire should maintain an appropriate feed rate.
The position of the silicon-calcium cored wire to the wire also has a great influence on the recovery rate of calcium. In the middle of the downward flow of the molten steel, the wire feeding point of the massive pure calcium wire should be selected, as far as possible away from the bright ring of the molten steel. No matter whether Ca is gaseous or liquid, the molten steel is forced to sink under the action of the downward flow. Thereby prolonging its residence time in molten steel and being completely absorbed by molten steel.
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