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US 8,137,433 B2Granted
Method of regenerating metal, regenerated metal, material for lithographic printing plate bases, and lithographic printing plate
AssigneeFUJIFILM Corporation
InventorsMasakazu Osada, Toru Yamazaki, Keiji Akiyama, Yoshio Okishi
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Abstract
A metal regeneration method including: a melting furnace cleaning step of melting pure aluminum with an aluminum content of 99.5% by weight or higher in a melting furnace to clean the inside of the melting furnace; and a metal regeneration step of melting waste lithographic printing plates selected from unused lithographic printing plates and used lithographic printing plates, in the melting furnace whose inside has been cleaned by the melting furnace cleaning step, to obtain regenerated metal.
Claims5
A metal regeneration method comprising:
- a melting furnace cleaning step of melting pure aluminum with an aluminum content of 99.5% by weight or higher in a melting furnace to clean the inside of the melting furnace;
- and
- a metal regeneration step of melting waste lithographic printing plates selected from unused lithographic printing plates and used lithographic printing plates, in the melting furnace whose inside has been cleaned by the melting furnace cleaning step, to obtain regenerated metal,
- wherein in the melting furnace cleaning step, pure aluminum is introduced into the melting furnace, and after the introduced pure aluminum has melted, substantially the whole amount of the pure melted pure aluminum is removed from a molten metal extraction outlet of the melting furnace so as to clean the inside of the melting furnace.
1 more element
Dependencies are inferred from the claim text.