| 摘要 |
PROBLEM TO BE SOLVED: To prevent muddy dust from depositing at the inlet of a cylindrical screen and to prevent the net basket from being clogged while sorting and recovering crushed dust with a sorter equipped with a rotary cylindrical screen. SOLUTION: A crushed dust inlet duct 4 is disposed at the inlet of a cylindrical screen 31 of a sorter 3, and an outlet chute 61 is opened at the lower part of the duct 4. The muddy material of the crushed dust is first discharged from the chute 61 to the outside. A scraper member 62 is disposed in the duct 4 to scrape off the dust depositing on the inner periphery of the duct. Consequently, the accumulation of dust in the duct is prevented.
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