Metso Minerals, Inc.

Harri Lehtonen

Kari Kuvaja

Keijo Viilo

Ilpo Nieminen

Ari Posti

Jarmo Eloranta

A crusher comprising at least a first crushing blade and a second crushing blade which are arranged to be rotary, one of the crushing blades being also arranged to move back and forth along a substantially harmonic linear path, and the rotating axes of the first crushing blade and the second crushing blade being parallel with the linear direction of movement of the second crushing blade. The second crushing blade is adjusted to move substantially harmonically back and forth along a linear path.

Crusher, method for crushing material and method for controlling a crusher

A crusher and a method for controlling a crusher having a first crushing member and a second crushing member defining a crusher setting of a crushing cavity into which material to be crushed is being fed. The method having the steps of: measuring continuously instantaneous load on the crusher; recording instantaneous load peaks exceeding a predetermined target level for the load peaks; keeping track of the number of the load peaks exceeding the predetermined target level during a predetermined period of time; and controlling loading of the crusher on the basis of the number of the load peaks experienced by the crusher during the predetermined period of time.

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Pirkkala, Finland

Harri Lehtonen