Rock Crusher History
Apr 16, along about this time the jaw crusher suddenly came back to life and stepped out in front with a great contribution to the line of mammoth-size primary crushers: the 84″ x 60″ machine built by the now joy mining machinery for a trap rock quarry in eastern pennsylvania. this big crusher was followed by a no. 10 (24″ opening) gyratory crusher for the secondary.Apr 16, many small process plants consisted of one crusher, either jaw or gyratory rock crushers, one elevator and one screen. recrushing, if done, was taken care of by the same machine handling the primary break. the single crusher, when of the gyratory type, might be any size from the no. 2 (6″ opening) to the no. 6 with 12-in..