| 摘要 |
PROBLEM TO BE SOLVED: To provide a crushing system in which amount of use of inert gas or the like can be suppressed to the minimum, considering such a problem that a negative pressure type vertical crusher sucking and drawing out gas inside the crusher, is conventionally used sometimes while the inside of the crusher is in an inert gas atmosphere in order to prevent fire or deterioration in quality of products caused by the crushing object, however in that case, a large amount of inert gas or the like introduced from outside the crusher is used as purge gas in order to protect a rotary portion or to prevent intrusion of outside air through a clearance.SOLUTION: In a crushing system of a vertical crusher including crushing rollers or a rotary classifier in structure, even if a large amount of purge gas must be used, amount of use of inert gas or the like newly introduced from outside the crusher can be suppressed to the minimum, by reusing, as the purge gas, circulation gas sucked from inside the crusher by a suction fan. |
