foundry return

foundry return

[′fau̇n·drē ri‚tərn]
(metallurgy)
A scrapped casting that is returned to the furnace for remelting.
References in periodicals archive ?
The total amount of heat to be removed from foundry return sand is a function of the initial temperature of the sand, desired temperature of the cooled sand, weight of sand to be cooled, ambient condition of the cooling air and temperature of the cooling water.
Foundries use these fluxes during the melting of heavily oxidized foundry returns and machining chips, as well as when metal holding temperature exceeds the 1420-1450F range.
Using these blocks allows a greater proportion of foundry returns to be melted, permits control of final silicon to lower levels, reduces sulfur and increases residual magnesium without affecting the silicon, and serves as an alternative to nickel-containing nodularizers.
Charges consist of 40-60% foundry returns with the balance made up of low carbon iron or 1010 steel, ferroalloys and deoxidizers.
Into each magnet-charged charge car, the foundry returns were placed in the back, the steel scrap in front of the returns and the borings on top of the steel in the front.
Muratore commented on the quality of today's steel scrap, foundry returns, pig iron, carbon/graphite and ferroalloys.
A standard melt contains a charge of 50% purchased scrap and 50% foundry returns.
Foote buys only certified, predried steel punchings, supplemented with internal foundry returns and virgin pig iron for gray iron and low-sulfur pig iron for ductile iron melting.
Pig iron, foundry returns and scrap steel are significant sources of N.
Overall heat treating costs illustrate that using pig iron, quality steel scrap and selected foundry returns is economically justifiable.
Rose, Duralcan USA, reviewed the status of procedures that have been developed to effectively remove gases and oxides from composite foundry returns.
The resultant slag from each trial melt was carefully removed before adding further graphite, ferrosilicon or foundry returns to produce a base iron suitable for ductile iron production.