| 摘要 |
PURPOSE:To correct automatically the fluctuation of the state of blast particles projected repeatedly and maintain a uniform blast condition during a blasting process by inserting a wind force classifier comprising a zigzag passage in the return circuit of blast particles. CONSTITUTION:A wind force classifier 7 comprising a zigzag passage is inserted in the blast particle return circuit of a reflux blast device. A magnetic classifier 8 is inserted in a tail part line 9 where a tail substance classified at the zigzag passage of the wind force classifier 7 is taken out. a magnetized substance classified by said magnetic classifier 8 is discharged out of the system, while a non-magnetized substance is returned to the system. The wind force classifier 7 is utilized in that way, thereby making the adjustment and maintenance of repeatedly projected blast particles at a constant state.
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