Secondary Crushing Equipment - 911 MetallurgistMar 19, 2017 . A very large number of secondary crushers in our present-day plants were originally primary crushers in those same plants. . The simple two-crusher, screenless arrangement works out fairly well for the large sizes of primary jaw crushers if the quarry-run rock is reasonably clean, or if any fine material.secondary crushing with jaw crushers,Jaw Crusher with "Multi Jaws" for Fine Crushing - 911 MetallurgistMar 19, 2017 . The Bakstad's Patented Multiple Jaws, is a Jaw Crusher that represents the first real advance made in increasing the crushing range of jaw crushers since their introduction. This Is the only crusher designed to give you a primary and two secondary crushers in one unit. Crushers of the jaw principle type.