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Archive for July, 2009
Blasting Tubes & Aggregate Directories
Posted by Rick from Hartsville, SC, US on July 19, 2009
Why do some quarries use blasting tubes (cardboard tubes) when blasting and some do not? Also - what is the best resource for getting a directory for all the Quarries in North America?
Blasting and explosives are outside my expertise. Try contacting an explosives company like Dyno Nobel Inc. - www.dynonobel.com.
Regarding directories of Quarries in North America, try these for US quarries:
* North American Aggregate Industry Directory - www.rockproducts.com
* USGS Aggregates Industry Atlas - www.aggman.com/atlas
* USGS directories and atlas from the source - http://minerals.usgs.gov/minerals/pubs/commodity/stone_crushed/
For Canada, try this government site: http://mmsd.mms.nrcan.gc.ca/stat-stat/mine-mine/index-eng.aspx
Normal Toggle Seat Life
Posted by Mark from Fayetteville, AR, US on July 1, 2009
If maintained properly, how long should toggle seats and plate run in a jaw crusher?
In any given single toggle jaw crusher there are typically two toggle seats, a frame and a pitman side, and one toggle plate. Although there are many factors in just how long a set of seats and plate will last, I have typically seen them average from three to eighteen months depending on the severity of the application.