YUFENGREC offer Refractories for ingot casting via bottom pouring
 As experienced suppliers of steel foundry .we devlope and produce a complete range of refractory shapes for your bottom pouring system, such as Sleeve, Runner, Funnels, Center Bricks, and any special shape can be customized. with high resistance to penetration by molten metal and used to single use in casting systems assembly during the metal casting.  
 Although the percentage of steel semi-products obtained via ingot casting is decreased during the last years, this method is still fundamental for specific low-alloy steel grades and for special forging applications.
 

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.
 
More details technical support of the refractory of steel casting , please mail us

   No.108 WANJIE ROAD , HIGH-TECH ZONE, ZIBO,SHANDONG,CHINA 
   +86-0533-5207252
  +86-0533-5207253
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