| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that corner parts of a civil engineering raw material cannot be efficiently removed when the civil engineering material has high toughness and is hardly shaved or chipped because the impact force to be given to the civil engineering material in a conventional washing apparatus for the civil engineering material such as sand or aggregate is not always sufficient. SOLUTION: In the washing apparatus 3 for carrying out a washing treatment or a corner rounding treatment for the civil engineering material 48 carried in a pipe line 58 by a pressure fluid and supplied from a charging port 59, a projecting body 104 projecting toward the axial center of the pipe line 58 is provided on or near the inner wall of the pipe line 58, a jet nozzle 51 for jetting the pressure fluid to the civil engineering material 48 flowing down from the charging port 59 is provided in the pipe line 58 and a gas and a liquid at least one of which is pressurized to a high pressure are supplied to the jet nozzle 51. The pressure fluid is formed by a two phase fluid 76 comprising a gas phase 74 of the gas and a gas/liquid mixed phase 75 surrounding the gas phase 74. COPYRIGHT: (C)2008,JPO&INPIT
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