(Left) Feeding raw material to the ZR950JC that has been pulverized into rubble in advance.
(Center) After crushing, material is fed to the VR408 by the ZR950JC discharge conveyor, and the VR408 sorts product into that which is less than / over 40mm in diameter.
(Right) Scrap metal that has been separated out using the ZR950JC magnetic separator.
With regard to the line-process on the Nagoya shopping center demolition worksite, raw material that has been processed into rubble in advance using a pulverizer is fed into the crusher using a hydraulic excavator. After crushing, rubble is sorted into product less than / over 40mm in diameter using the screen. Product that is still over 40mm is re-fed into the crusher. Using a suspended magnetic separator that hangs from the permanent-magnetic selector, that is provided standard on the ZR950JC, scrap metal, etc. can also be efficiently removed from product. At the current time, based on the calculation of 8 hours operation each day, approximately 670m3 of material can be processed per day. To put this in another way, Mr.Hirofumi Murata evaluates the crushing speed of the ZR950JC very highly, considering it to be some “2.5 times faster than traditional equipment.” With regard to such capabilities, Ms.Fujiko Toyota, who is responsible for using an excavator to feed the crusher, offers the following comment:
“On this project, it is planned that the timeline will run until August of this year. Then again, if we did not have the ZR950JC operating, considering the worksite size, during the final phases of the project we would just be left with crushing and recycling work. In reality, however, due to the crushing speed of the ZR950JC, such finishing-up work will not be created in the first place. Furthermore, through combining this unit with a screen, it becomes very easy to organize product based on size after recycling has been completed. As such, a shortening of the overall demolition timeline becomes possible.” (Ms.Fujiko Toyota)
Furthermore, as the person responsible for feeding the crusher, Ms.Fujiko Toyota commented that “stress had been removed” from her job. Indeed, she evaluated the ZR950JC “self recovery function” highly. When uncrushable material is fed into the crusher chamber, an opening along the crusher conveyor belt is automatically opened and such material ejected. After ejection, the function works to return the opening along the conveyor belt to a preset width.
“Traditionally, because there was always the worry of the crusher being damaged by uncrushable materials such as metallic masses (present within the feed), the crusher itself was sometimes temporarily stopped in order to remove such material manually. Just doing this tended to slow work down. Furthermore, we tended to take a very serious approach to confirming as to whether or not there were any uncrushable materials mixed in with the raw material feed, prior to it being fed into the crusher. However, this self-recovery function addresses these issues. As such, I think we can now get on with work without really worrying about things.” (Ms.Fujiko Toyota)