Screening Crusher Feed

The feed to a crusher should not contain an excessive amount of fine material; this could be stated a little more definitely by saying that it should not contain an excessive amount of material smaller than the crusher product size. Just what constitutes an “excessive amount” depends of course upon several factors, chief among which are the design of the crushing chamber, the setting, and the character of the material being crushed. Quarry operations do not usually require scalping ahead of the primary crusher, although there are exceptions to this. Gravel pit and mining operations almost always require scalping ahead of the primary machine because of the large percentage of fine material in the pit-run, or mine-run, material. Generally, when scalping is required at this point, the split is made at approximately the open-side of the primary crusher. Screening between the primary and secondary stages is always desirable, although it is by no means a universal practice. Where very large primary crushers are involved with accompanying large size product it has been common practice in the past to pass the product of the primary machine directly into the secondary. So far as product gradation is concerned, this is equivalent to … Continue reading Screening Crusher Feed