| 摘要 |
The apparatus consists of an autogenous mill (10), an ore sorter (18) and means (12, 20) for feeding pebbles from the mill to the ore sorter (18) and from the sorter (18) back to the mill (10). The method includes the steps of feeding the ore to be processed to the mill (10), grinding the ore in the mill (10), removing pebbles in a specific size range from the mill (10), sorting the removed pebbles into fractions above and below a predetermined mineral characteristic level by means of the ore sorter (18) and feeding the pebbles above the predetermined characteristic level back into the mill (10) for further grinding. The sorter (18) may comprise a radiation detector 28 operatively linked to an air blast valve 30. However the sorter may operate on the basis of conductivity, magneticity, colour or like characteristics of the pebbles. <IMAGE> |
