The cored wire is one of our company's main products. If the cored wire is used properly according to the requirements, a good deoxidation efficiency can be achieved and the quality of the steel can be improved. Of course, after the development in recent years, the types of cored wires are also developing in a diversified direction. Users can purchase and apply different types of cored wires according to different production requirements. So, in order to achieve a good application performance when operating the cored wire, what details should be paid attention to?
1. Properly adjust the feeding speed
Feeding speed has a great influence on the absorption rate of Ca, whether it is too fast or too slow, it will cause the absorption rate to decrease. When the cored wire for steel making is fed to a certain depth, it starts to melt, and its depth should ensure that the molten and dispersed calcium bubbles are subject to a greater static pressure of the molten steel, so that they will be consumed as completely as possible before they float to the molten steel surface. Appropriate linear feeding speed can increase the yield of calcium. If the speed is too fast, on the one hand, the molten steel will violently churn due to the large amount of calcium vapor generated locally, and a large amount of calcium vapor will directly volatilize into the air; on the other hand, the calcium vapor will float up before it is dissolved, thereby reducing its yield. On the contrary, if the speed is too slow, the feeding depth will be insufficient, and it will float to the molten steel surface before it can be completely dissolved in the molten steel and be wasted, like how the calcium cored wire works exactly this way.
2. Correctly choose the wire feeding position
The wire feeding position also has a great influence on the calcium recovery rate. The cored wire feeding point should be selected at the center of the downflow of molten steel, as far as possible from the argon blowing bright circle, so that no matter whether Ca enters the molten steel in a gas or liquid state, it will be forced to descend under the action of the downward flow, thereby prolonging its residence time in the molten steel and making it fully absorbed by the molten steel.