| 20100159247 | SAND MAKING APPARATUS, SAND MAKING METHOD, AND MADE SAND - A sand making apparatus comprises: a crusher configured to crush crushed materials; a first sorter configured to sort the crushed materials obtained from the crusher into coarse particles, fine particles, and powders through air sorting by air blowing and screening sorting by a screen; a negative pressure collection unit configured to suck and collect the powders from the first sorter; and a second sorter disposed between the first sorter and the negative pressure collection unit, the second sorter configured to sort the powders into coarse powders and fine powders through negative pressure of the negative pressure collection unit. | 06-24-2010 |
