| 摘要 |
PCT No. PCT/NO96/00295 Sec. 371 Date Sep. 25, 1998 Sec. 102(e) Date Sep. 25, 1998 PCT Filed Dec. 13, 1996 PCT Pub. No. WO97/22735 PCT Pub. Date Jun. 26, 1997A method for the use of material containing carbon as a packing material, anode mass or collar mass in connection with the electrolytic production of aluminium. The material is formed by granulating a mass which contains carbon particles and a binder. The carbon particles may comprise a carbon material which has been returned from the aluminium production process. The binder may comprise tar which is collected in connection with burning anodes. The carbon particles may comprise butt filter dust and can contain contaminants such as sodium (Na) and fluorine (F). By adding a powder/dust which contains silicon oxide (SiO2) to the mass, the contaminants can be rendered harmless. The added material can be formed by crushing and grinding used cassette stone (chamotte) to dust The present invention makes possible comprehensive reuse of several waste products of the electrolytic production of aluminium. |
