The very first step should always be an analysis of the quarry, and especially the characteristics of the raw material. Of prime importance is the hardness of the material to be crushed. To describe this property the compressive strength, the Los Angeles Index or the Mohs Hardness should be determined and a point load test should be carried out.The abrasiveness of the material has to be described by its Silica and free quartz content, as well as the abrasion index. Just as important is an expression of the stickiness. For this reason the moisture DMP planetary mixers for sale, the clay content and SICOMA Twin Shafts Forced Concrete Mixer, in very difficult applications, the handling coefficient (shear test) has to be ascertained. Based on this data an overview of the selection criteria allows a pre-choice of the required crusher.
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Primary crushing of limestone for the cement production requires high
crushing ratios to reduce the material in a single step, down to the required
grain size (approx. 0 – 25/80mm) for the raw mills. It should always be the aim
to have as few crushing steps as possible planetary mixer, in order to minimize
the investment and maintenance costs and time.
