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.Apr 27, the jaw crusher can crush all kinds of soft and hard materials, such as: granite, quartz stone, diabase, river pebbles, iron ore, etc. hammer crushers are mainly used to crush ore with low hardness, and the compressive strength is generally less than 200mpa, such as limestone, bluestone, coal gangue,.