Double Roll Crushers Double Roll Crushers typically follow a primary or secondary crusher and are used for secondary and tertiary reduction of various minerals, such as ROM coal, clean coal, limestone, gypsum, trona, shale, bauxite, oil shale, coke, salt, lime, glass, kaolin, brick, shale and wet, sticky feeds.
We were a repair company that specialized in rebuilding crusher rolls and jaw plates. The very first year of operation was extremely difficult, as resources were tight, and the work was hard. My Mother was the office staff, secretary, accountant, and payroll person.
The grizzly is responsible for preventing over size material from entering the ore passes and the crusher where the material is liable to do damage to the equipment and underground construction. A standard opening for the grizzly, as defined by McIntosh Engineering, is ±16 by 18 inches.