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An electric arc furnace includes a crucible having a metal shell for recovering precious metals from spent material. The shell includes a metal tap hole and a slag door positioned above and opposite the metal tap hole. A removable swinging roof is provided above the crucible together with a pluralit

An electric arc furnace includes a crucible having a metal shell for recovering precious metals from spent material. The shell includes a metal tap hole and a slag door positioned above and opposite the metal tap hole. A removable swinging roof is provided above the crucible together with a plurality of electodes for heating the spent material. Also, a cooling band circumscribes the crucible for cooling the metal shell. Conveyors are provided for distributing the spent material at a plurality of points located between the electrodes and the wall of the crucible. The crucible is tilted to allow the removal of the slag and metal.

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A method of recovering precious or heavy metals from spent catalyst comprising the steps of: conveying the spent catalyst into the top of the crucible of an electric arc furnace; heating the spent catalyst to a temperature above the melting point of the spent catalyst utilizing a plurality of electr

A method of recovering precious or heavy metals from spent catalyst comprising the steps of: conveying the spent catalyst into the top of the crucible of an electric arc furnace; heating the spent catalyst to a temperature above the melting point of the spent catalyst utilizing a plurality of electrodes extending into the crucible to form slag and a lower metal phase; cooling the exterior of the crucible to maintain the integrity of the furnace; settling the precious or heavy metal from the slag as the metal passes to the lower metal phase beneath the slag; tilting the crucible to remove the slag by pouring the slag through an upper slag door and into a forehearth furnace; tilting the crucible to remove the precious or heavy metals through a lower tap hole; maintaining the heated slag in the forehearth furnace at a temperature and for an additional time such that additional precious or heavy metals are separated from the slag; and tilting the forehearth furnace to remove the additional precious or heavy metals by pouring the additional precious or heavy metals through a tap hole in the forehearth furnace to recover such additional precious or heavy metals.