In metal smelting, ingot casting is divided into upper casting and lower casting.
The molten steel ingot is usually a lower casting method. The molten steel is discharged from the underside of the ladle and enters the medium casting tube, and enters the ingot mold from below. At this time, the shrinkage cavities of the residue are concentrated on the upper part of the steel ingot to ensure the quality of the ingot.
Non-ferrous metal ingots are usually cast-up and cast into individual ingots, such as common aluminum ingots. Impurities attached to the upper surface cannot be separated.
The two ingot methods are related to their subsequent processes. Steel ingots are used to roll steel and the upper part of the ingot can be cut to ensure quality. The aluminum ingot is used in a variety of processing processes, and impurities can be separated when remelted.
Casting is "casting" and casting is "casting". Obviously, the lower casting can guarantee the quality than the pouring.
The casting performance of steel is not so good, the quality is difficult to ensure, and the temperature of molten steel is essential.
For steel castings, if the smelting furnace can meet the requirements of the castings, the lower casting method is adopted, and the quality of the steel castings is good after cutting off the excess risers. If the casting is large, the smelting furnace is small, and multiple furnaces need to be smelted and continuously cast, the casting method must be used, so that the impurities mixed in will be more.
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