| 摘要 |
PROBLEM TO BE SOLVED: To provide an asphalt ejection pipe for an asphalt plant, which prevents clogging of an ejection nozzle thereof to the utmost. SOLUTION: According to the structure of the asphalt ejection pipe, a rod-shaped heater protective pipe 11 is inserted into the asphalt ejection pipe 4, and an asphalt heating and heat insulating heater is installed in the heater protective pipe 11, to thereby directly heat asphalt by the heater. Thus problems of excessive heating of the asphalt adhering to an inner wall of the asphalt ejection pipe 4 and carbonization of the asphalt are eliminated, and therefore clogging of the ejection nozzle is prevented to the utmost. COPYRIGHT: (C)2005,JPO&NCIPI
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