Method of recovering magnesium alloy from composite scrapped metal objects

Claim 1

THE METHOD OF MELTING SCRAPPED COMPOSITE METAL OBJECTS COMPRISING A PLURALITY OF PARTS, AT LEAST ONE OF SAID PARTS CONSISTING OF A MAGNESIUM-BASE ALLOY HAVING A MAGNESIUM CONTENT OF AT LEAST 80 PER CENT BY WEIGHT AND ANOTHER OF SAID PARTS CONSISTING OF A HEAVY METAL ALLOYABLE WITH MAGNESIUM AND FUSIBLE AT THE TEMPERATURE EMPLOYED IN THE MELTING OF THE MAGNESIUM-BASE ALLOY WHICH COMPRISES SUBMERGING THE SCRAPPED METAL OBJECT IN A MELTING ZONE WITHIN AND IN CONTACT WITH THE FLUX OF A FUSED SALINE FLUX BATH, SAID FUSED SALINE FLUX HAVING A DENSITY SUFFICIENT TO FLOAT THE MAGNESIUM-BASE ALLOY WHEN FUSED BUT INSUFFICEINT TO FLOAT THE HEAVY METAL WHEN FUSED AND BEING MAINTAINED AT A TEMPERATURE SUFFICIENT TO MELT BOTH THE MAGNESIUM-BASE ALLOY AND HEAVY METAL, SUPPORTING THE SAID OBJECT WITHIN THE ZONE ABOVE THE BOTTOM OF THE SAID FLUX BATH A DISTANCE SUFFICIENT TO PERMIT THE HEAVY METAL PART WHEN FUSED TO SETTLE BELOW THE SAID OBJECT, WHEREBY THE MAGNESIUM ALLOY PART FUSES AND THE RESULTING GLOBULES OF FUSED MAGNESIUM ALLOY RISE TO THE SURFACE OF THE FLUX IN THE MELTING ZONE AND FLOAT THEREON WHILE THE HEAVY METAL FUSES AND SETTLES, WITHDRAWING MOLTEN FLUX FROM THE FLUX BATH OUTSIDE THE MELTING ZONE AND INTRODUCING THE SO WITHDRAWN FLUX INTO THE MELTING ZONE SO AS TO BRING THE FLUX SO INTRODUCED INTO CONTACT WITH THE OBJECTS TO BE MELTED, WITHDRAWING MOLTEN FLUX FROM THE SURFACE OF THE FLUX IN THE MELTING ZONE AND TOGETHER THEREWITH MOLTEN MAGNESIUM-BASE ALLOY FLOATING THEREON, SEPARATING THE FLUX SO WITHDRAWN FROM THE MAGNESIUM ALLOY, AND RETURNING THE SO SEPARATED FLUX TO THE FLUX BATH OUTSIDE THE SAID METLING ZONE.

Claim 2

THE METHOD OF MELTING SCRAPPED COMPOSITE METAL OBJECTS COMPRISING A PLURALITY OF PARTS, AT LEAST ONE OF SAID PARTS CONSISTING OF A MAGNESIUM-BASE ALLOY HAVING A MAGNESIUM CONTENT OF AT LEAST 80 PER CENT BY WEIGHT AND ANOTHER OF SAID PARTS CONSISTING OF A HEAVY METAL ALLOYABLE WITH MAGNESIUM AND FUSIBLE AT THE TEMPERATURE EMPLOYED IN THE MELTING OF THE MAGNESIUM-BASE ALLOY WHICH COMPRISES SUBMERGING THE SCRAPPED METAL OBJECT IN A MELTING ZONE WITHIN AND IN CONTACT WITH THE FLUX OF A FUSED SALINE FLUX BATH, SAID FUSED SALINE FLUX HAVING A DENSITY SUFFICIENT TO FLOAT THE MAGNESIUM-BASE ALLOY WHEN FUSED BUT INSUFFICEINT TO FLOAT THE HEAVY METAL WHEN FUSED AND BEING MAINTAINED AT A TEMPERATURE SUFFICIENT TO MELT BOTH THE MAGNESIUM-BASE ALLOY AND HEAVY METAL, SUPPORTING THE SAID OBJECT WITHIN THE ZONE ABOVE THE BOTTOM OF THE SAID FLUX BATH A DISTANCE SUFFICIENT TO PERMIT THE HEAVY METAL PART WHEN FUSED TO SETTLE BELOW THE SAID OBJECT, WHEREBY THE MAGNESIUM ALLOY PART FUSES AND THE RESULTING GLOBULES OF FUSED MAGNESIUM ALLOY RISE TO THE SURFACE OF THE FLUX IN THE MELTING ZONE AND FLOAT THEREON WHILE THE HEAVY METAL FUSES AND SETTLES, WITHDRAWING MOLTEN FLUX FROM THE FLUX BATH OUTSIDE THE MELTING ZONE AND INTRODUCING THE SO WITHDRAWN FLUX INTO THE MELTING ZONE SO AS TO BRING THE FLUX SO INTRODUCED INTO CONTACT WITH THE OBJECTS TO BE MELTED, WITHDRAWING MOLTEN FLUX FROM THE SURFACE OF THE FLUX IN THE MELTING ZONE AND TOGETHER THEREWITH MOLTEN MAGNESIUM-BASE ALLOY FLOATING THEREON, SEPARATING THE FLUX SO WITHDRAWN FROM THE MAGNESIUM ALLOY, AND RETURNING THE SO SEPARATED FLUX TO THE FLUX BATH OUTSIDE THE SAID METLING ZONE.