CM 335 Lesson _3--CPEM Chapter 14--Crushers

CM 335 Lesson _3--CPEM Chapter 14--Crushers - 9/22/2008...

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9/22/2008 1 Peurifoy, Schexnadyer, Shapira Instructor: Dustin Olson, MBA Four basic functions: M Size reduction - crushing M Size separation - screening M Elimination of undesirable material - washing M Movement and storage M Crushers Ch P d t i M Crusher Production M Screening M Screen sizing
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9/22/2008 2 ± Jaw ± Gyratory ± Cone ± Roll ± Impact ± Specialty Rock flows into the space between two vertical jaws. One jaw is stationary. The other jaw moves in an elliptical- downward motion toward the stationary jaw while crushing, and upward and away from the stationary jaw allowing the crushed material to exit. Moves in an elliptical- downward motion toward the stationary jaw while crushing Table 14.3 gives representative capacities.
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9/22/2008 3 Jaw crushers are primary units that units, that receive material directly from the quarry. Has a gyrating mantle mounted within a deep bowl. Table 14.4 gives representativ e capacities.
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9/22/2008 4 Gyratories are used as primary or secondary units. Works like a gyratory with an eccentric rotating cone around a vertical shaft to cause a gyrating movement of the head gyrating movement of the head. Differs from a gyratory: Ø A shorter head Ø Smaller receiving opening Ø Higher rotation speed Cone shorter head Gyratory Cone smaller receiving Gyratory opening
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9/22/2008 5 Cone higher rotation speed Gyratory Roll crushers are used for intermediate stages f d ti of reduction. Very limited reduction capability, see Table 14.2, page 411 . The maximum size stone that may be fed a roll crusher is directly proportional to the diameter of the rolls. If the stones are too large, they will not grip the material and pull it through the crusher.
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CM 335 Lesson _3--CPEM Chapter 14--Crushers - 9/22/2008...

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