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IMS Engineering Ltd
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  5. Kawasaki - Primary Gyratory

Kawasaki - Primary Gyratory

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Kawasaki"s gyratory crusher for primary crushing of iron ore, copper ore or other materials has been designed and built on the basis of extensive crushing and manufacturing technology and operational experience. These state-of-the-art range of crushers feature quality and dependability as required for the primary crushing operation of any major mine or material preparation operation. In addition to a simple strong structure, the crushing chamber design is optimised to meet the requirements of the specific crushing application ranging from the processing of extremely hard and abrasive material to soft sticky material. Wet system primary crushing can also be done allowing crushing and scrubbing to happen simultaneously in the primary crushing stage.
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Special attention has been paid to the crushing chamber design to ensure the correct nip angle and eccentric movement where it is required. Furthermore, the required discharge setting can be maintained throughout the useful life of the mantle and concave liners. The result hereof is excellent metallugical performance.

The discharge setting is adjusted by the amount of oil in the hydraulic cylinder provided at the bottom of the main shaft. While adjustment of the discharge setting is easily accomplished by means of this hydraulic system, it also provides the capability to release uncrushable material fed into the crushing chamber. This system also enables the crusher to be re-started under load.

  • Because of Kawasaki`s crushing chamber design (Patent) which matches the feed material size distribution, slipping or jumping of the main shaft rarely occurs even during the processing of very hard material.
  • The design of the machine and crushing chamber is such that the required discharge setting can be maintained throughout the useful life of the mantle and concave liners.
  • Mounting of the concave is of a self-tightening design (Patent). The concave liners cannot come loose during operation and can be replaced by one row at a time.
  • Dust sealing is of the dual system type, consisting of a dust ring of a special material and an over-pressure air system.
  • A spherical bearing employed as a spider bearing provides greater load carrying capacity and extended service life. The inner race of the spherical bearing is of sleeve construction (Patent) for easier maintenance.
  • The seal for the spider bearing has a scraper on its outside to remove mud or dust, with an oil seal installed inside for double seal construction. The life of the spherical bearing is thus extended.
  • A discharge set indicator is a standard feature. Adjustment of the discharge setting is carried out easily and within a short time by means of the hydraulic system.