Equivalent Round and Square Screen Openings
How Ores have Resistance to Crushing
During the last few years, one of the great problems in the milling of all ores has been that of crushing. This subject involves not merely the cost of the operation, but also the selection of the proper degree and character of crushing to yield the best metallurgical results on the given ore. Considering the […]
MP Cone Crusher Parts
Rock Crushing Theory and Formula using Kick & Rittinger’s Law
Rittinger’s theory and law of the energy expended in crushing of rock is that the work of crushing is proportional to the reduction in diameter; or, as I have more fully expressed it: “The work done in crushing is proportional to the surface exposed by the operation; or, better expressed for this purpose, the work […]
Crushing Plant Flowsheet & Design-Layout
In the crushing section, the ore as it comes from the mine is broken down dry to a size suitable for the wet grinding machines ; these can, if necessary, be made to take lumps of 2-in. size, but they work much more efficiently if their feed is ½ in. or less. Before the advent of […]
Rittinger and Kick’s Laws of Crushing
I happen to be one of those who believe that Rittinger probably meant what he said when he wrote what Stadler has quoted, “the increase of the surfaces exposed is directly proportional to the force required for reducing” “and therefore also to the work absorbed in effecting the separations.” (The italics are now mine instead […]
Rope Conveyor
Crushing Energy & Work of Crushing Machines
A general awakening of interest among mill men concerning the mechanical efficiencies of their crushing machines is evident from a perusal of the recent files of mining publications. Considering the large part of the power bill which must be debited to the crushing department, such interest is natural. When, however, the articles on the subject are […]
Factors Controlling the Capacity of Rock Crushers
When estimating the capacity of crushers under given conditions, it is necessary to employ an empirical factor which has here been designated by the letter k, representing the percentage ratio between actual crushing rate, and a theoretical capacity based on the dimensions and other data correlated in equation (12). The accuracy of this factor limits […]
Open or Closed Circuit Crushing
The factors governing the determination of capacity for any open circuit crushing stage are much the same as those we outlined in connection with the secondary stage. In a properly designed crushing plant, excepting those plants which by-pass a portion of the pit-run around the head end of the flow line and inject this fraction […]