METHODE ET APPAREIL DE COULEE D'ANODES

ABSTRACT A method for casting an insoluble anode for use in theelectrowinning of copper, the anode being formed by casting moltenlead alloy preferably including calcium as an alloying agent in asuitable mold necessary flow of the molten alloy being minimizedwithin the mold, the temperature of the molten alloy and thetemperature of the mold being selected to minimize the time necessaryfor solidification of the molten alloy within the mold, the leadalloy anode preferably being removed from the molu substantiallyas soon as it is mechanically self-supporting and rapidly coolingthe anode in an unstressed configuration to freeze its grainstructure and develop dimensional stability. The present inventionalso relates to a lead alloy casting produced by the above methodas well as to an insoluble anode formed from a lead alloy includingcalcium as an alloying agent, the anode being characterized by theuniform precipitate distribution illustrated in Fig. 7 and thesurface finish illustrated in Fig. 9.