Mold filling of heavy ingot can be performed in two ways: top pouring and bottom pouring, Top pouring, the molten steel is more exposed to air, suffering from reoxidation problems. As the pouring steel impinges on the melt surface inside the mold, it carries reoxidation products and mold powder, floating on it, back into the bulk, resulting in macro-inclusions. Moreover, during filling, metal splash adheres to the mold walls and produces surface defects on the ingot skin, which subsequently needs surface conditioning. This makes the top pouring method not suitable for high-quality steels. Bottom pouring is better way, especially intensive de-oxidation, high superheat, low turbulence, and casting in anon oxidizing atmosphere .The molten steel flows from the ladle down to the trumpet and passing through the horizontal refractory runner, it enters the nozzle or ingate upwards, reducing the exposure to air and the entrapment of mold powder and the occurrence of splashing. The bottom pouring needs a controlled velocity during filling in order to avoid turbulences and, consequently, powder entrapment or reoxidation defects.