Capital Equipment News August 2018

CRUSHING – PART 1

Impact crushers can be classified as primary/ secondary crushers or secondary/tertiary crushers.

Optimising crushing gains Regarded as the main process in aggregate production, crushing is the first controlled size reduction stage and is the basis for optimal further size reduction. It is, therefore, important that when choosing a new rock crusher the first thing you need to know is which one best matches your material – and it is imperative to find the right one the first time, writes Munesu Shoko .

used in different end processes”. The primary objective of a crushing stage is size reduction, so having the correct crusher in the correct duty is essential for quality aggregate production,” he says. Sandro Scherf, CEO of Pilot Crushtec International, shares the same view, saying that the crushing stages are critical to achieving the right quantity and quality of aggregate products. “Similar to driving a vehicle, to reach top speed you need to go through various gears; in aggregate production, you need to go through various crushing stages. The number of crushing stages will vary depending on production requirements such as the quantity you need to produce and the specifications of the final product,” says Scherf. Dewald Janse van Rensburg, MD of B&E International, says by applying

B y tonnage, crushing is by far the largest process operation in aggregate processing. To execute the process cost-effectively, it’s always important to deploy the correct crusher for the ideal application. This not only saves you time, but it will also save you money in the long run. Just how important is crushing in the whole aggregate production equation? To reiterate the significance of the process, Heath Dickson, national mining sales manager at ELB Equipment, says “simply put, without crushing, in specification aggregate would not exist”. JD Singleton, process director at Weir Minerals Africa, says “size reduction in aggregate production is required to achieve the different product gradations

CAPITAL EQUIPMENT NEWS AUGUST 2018 8