Hot Delivery and Hot Charging Conditions for Steel Billets Attention
Hot charging and hot delivery is a common heating method for steel billets. The replenishment of molten steel or hot rolling is completed in the process of preliminary heating the steel billets. Therefore, it is very important to pay attention to the hot charging and hot sending of steel billets in the process of steel billet heating.
First, it should pay attention to the appropriate charging temperature of steel billet charging. Generally, the temperature before charging should be gradually increased. For example, if the temperature of the steel billet is 800°C, the charging temperature should be controlled at 750°C. Moreover, too low temperature will cause the steel billet to cool down and the cooling rate will be too fast, which will affect the normal heating of steel billet.
Second, pay attention to proper delivery of steel billet number. The number of steel billets should be appropriate, and if the number is excessive, the furnace temperature will be too low, and if there are few steel billets, the benefit of hot charging will be affected. At the same time, attention should be paid to the arrangement of steel billet in the furnace. The gap in the steel billet should be as small as possible, and the upper furnace temperature should be uniform.
Thirdly, special attention should be paid to the situation that the end of steel billet is in the bottom of the furnace. The steel billet at the bottom of the furnace needs to be rolled or lifted occasionally to ensure adequate heating. Its lifting frequency depends on the steel billet furnace and size.
Fourth, it should pay attention to the selection of steel billet price. It is better to use the price with slight deformation, because the price with slight deformation can improve the steel billet contact rate in the furnace and make it evenly heated.
Fifth, pay attention to the protection of furnace environment. During the charging and sending process of steel billet, the scale and air in the steel billet surface must be exhausted. In addition, the surface of steel billet must be wetted with flux to protect the surface of steel billet and improve the heating quality.
In short, both hot charging and hot sending are important processes in the heating of steel billets. In order to complete the heating process of steel billets smoothly, it is necessary to pay attention to many details and do a good job in the hot charging and hot sending of steel billets.
