Molten metal is a serious hazard in melting pouring applications of
metal casting. Workers who execute tasks with or near the molten metal
are highly prone to risks, such as coming in contact with metal
splashes or be exposed to electromagnetic radiation.
Some of the circumstances that may increase the risk of hot metal
splashes are -
More at:
http://www.themetalcasting.com/articles/2008/08/hazards-and-control-measures-o.html