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This paper presents the results of an investigation into the effects of the Bond work index and the mean particle size on particle size distribution in a pilot scale impact mill. The results denote that particle size distribution is strongly related to mean particle size (X) and Bond work index (Wi). The relationship with data from experimental and proposed equation for determination of particle size distributions has emerged by a high regression value (r2 = 0.88).
6. Conclusions
In this study, laboratory crushing tests of three different limestones with an impact crusher were carried out. The effects of mean particle size and Bond work index of limestones on product size distribution were investigated.
The proposed model equation which incorporates the self-similar breakage behaviour in laboratory comminution could be used an alternative to the drop weight and twin pendulum tests, as its particle size distributions could evaluated more readily and reliably.
There are no studies in the literature which have been made about the effect of the amount of feed, effect of rotor speed, lining design and design of the hammer on the impact crushers, very commonly used in quarries. Therefore, crusher and grinder manufactures will be possible to make appropriate choices of such studies with different designs for different material to be developing similar models.
This study showed that product size distribution could be different for different material properties. Therefore, it appears that the particle size distributions of each material in crushing process must be evaluated in order to lower the energy costs