![]() The problem of calculating surge storage for such an operation is a simple one if operating conditions, such as character of feed and product size, remain unchanged, and if the feed rate to the primary unit is fairly constant from shift to shift. ![]() That is the essence of the problem: to keen as many as possible of the plant units rummy under uniform mad and at full capacity.Īs a a example of one extreme in the need for surge capacity we have those plants whose primary and often secondary units operate only one shift of 8 or 10 hours/day, whereas the re-crushing and screening units run full time, or nearly so. either provide stage crushing to match the high capacity of the primary or, if we want to get the most work out of our investment dollar, set up a surge capacity in the plant to absorb the peak load and feed it through the plant steadily over the entire 30 minute cycle. About all we can do is to rough out our plan of operation, and allow a comfortable margin for contingencies.įor example, if it is calculated that one trainload if rock will be de live red to the plant each one-half hour, on the average, and our primary crusher has been chosen with a view to getting this tram through in ten minutes, then we must, enviously. It is difficult to visualize beforehand just how smoothly a projected scheme of quarry or pit operation is going to function, and impossible to forecast accidental delays in loading, transportation, and feeding. While the case for an ample surge storage is clear cut enough, the question of just what constitutes an adequate storage is not always an easy one to answer. also it throws a variable load on-the screens and screens do not perform at maximum efficiency under such a load. We can, of course, get around this by providing enough crushing capacity to absorb the peaks, but this method is expensive p. It is not always possible to feed the plant in this manner a smooth flow of feed to the primary crusher is the exception, rather than the rule therefore, if we are to smooth out the flow in the plant itself we must have elasticity in our flow line, and the logical way to obtain it is to provide surge storage ahead of each crushing stage. It is desirable, in the crushing plant, as it is in any production process, to achieve a smooth and uninterrupted flow through the plant so that the reduction crushers and sizing screens will be operating at all times under uniform load conditions, and at full capacity. The provision of adequate surge storage at the right places in the flow line is of sufficient importance to warrant a little further consideration. I need to further comment on the influence of surge storage upon plant operation. ![]()
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