Siphon outlet

a siphon outlet enables slag-free casting from foundry ladles. In channel fur- naces, the inlet and outlet are arranged according to the siphon principle. In this way, the molten metal is always fed in and removed below the bath sur- face. When emptying below the minimum sump level, the function of the siphon must not be interrupted for filling, i.e. the furnace may only be tipped back slowly, in relation to the filling level. If the furnace is tipped back into the basic position while still under-filled, the ingress of air, and thus also oxygen, is unavoidable. The furnace atmosphere is therefore enriched with oxygen, leading to increased slag formation on the melt sump. The ceramics in the transitional area between the siphon and the furnace vessel can also be dam- aged.