| 摘要 |
The metal-containing slag is crushed (2) and sieved (3) in order to remove the fraction smaller than 7 mm., passing the latter to a first hopper (4). The rest is ground in grinders (5) to attain granulometries smaller than 40 mm. and it is sieved (6) again in order to separate another fraction smaller than 7 mm which is also passed to the first hopper (4). The slag larger than 7 mm. is sent to a first density separator (8) to separate out the metal which passes to a silo (9), with a purity of 90% metal. From the first density separator (8) a concentrate with a granulometry less than 7 mm. and 60 % metal content is sent to the first hopper (4). From the first hopper (4) the fine slag and metal passes to another density separator (10) with screen less than 0.5 mm and thus a metal of 0.5 to 0.7 mm with a fineness of 95 to 98 % and metal smaller than 0.5 mm. with a fineness of 98 % are obtained. <IMAGE> |
