Silica sand mining line in stone quarry

22/05/2014 Pet Care Products

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A back wall 21 fastened between the side wall sections 17 extends upwardly from the back discharge plate 11, and top-forming walls 23 fastened between side sections 19 extend across the back upper portion of the housing. The front 25 of the housing is opened for entry of the rock,<a href="">mobile crushing plant</a> and an open front hood 27 is mounted on the upper front portion of the housing so as to provide a larger feed entrance. It will be noted in FIGURE 2 that the thickness of the side 7 wall plates diminishes in the upward direction, hence the side wall structure formed from a multiplicity of side plates is advantageous in achieving an economical construction consistent with the strength requirements of a crusher, wherein the greater wear is at the lower portion adjacent the rotor. Also, the several side sections permit adjustment in the height of the machine, as by replacement of side sections at the upper part of the machine. Chains 29 may be hung from the top of the hood 27, as illustrated in FIGURE 2,<a href="">silica sand mining process</a> the rock being fed between the lower ends of the chains and the top of an inclined feed plate or chute 31. The chains permit large rock to enter the machine while preventing the smaller rocks from being thrown outwardly during the crushing operation.

V The location' of the feed plate 31 with respect to the rotor and the primary breaker bars is important. The relative location is such that, in normal operation, only one hammer of the rotor is working at any instant. Working is here used in the sense of delivering blows upon the stone to be crushed; it being understood that both hammers constantly (while in rotation) contribute their mass to the energy which either hammer can deliver. This is accomplished by arranging the breaker bar, which. determines the maximum size of the crushed product, at an angular displacement (about the axis of the rotor) from the feed plate which is sufficiently less than the angular displacement between successive hammers that, in each revolution, the work of one hammer is completed before the work of the succeeding hammer commences.

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