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- W1995309330 abstract "The objective in many cases of industrial grinding is not simply to produce fine sizes but to liberate one component from another by breakage of particles which contain both components locked together. Thus, it is not sufficient to know only the product size distribution, but it is also necessary to know also the range of interlocking within each size, called the liberation function for that size. This paper describes a technique for calculating the function from data where float-sink analysis can be used to separate different compositions and shows how the results can be represented graphically.Various size fractions of a hammer-milled coal and the same coal ground in a ball mill were examined to determine the liberation function M(C) for each size. It was found to be necessary to fit a three parameter function to points on the Mayer curve of ash (mineral matter) units floating versus mass floating. The function was A(M) = k1M + k2Mn. Since A(M) = ∫M0CdM(C), then C = dA(M)/dM and the liberation function is M(C)=[(C−k1)/nk2]1(n−1). This technique worked well for the hammer-milled coal data taken at 1.4, 1.5 and 1.6 specific gravities, and enabled the calculation of the locking index for each product size (√2 screen intervals). However, the corresponding data for ball-milled coal were inconsistent, although the change of liberation with increased grinding could be shown qualitatively from plots of M/(1−φ) versus C/φ, where φ is the ash fraction of each size." @default.
- W1995309330 created "2016-06-24" @default.
- W1995309330 creator A5073181260 @default.
- W1995309330 date "1996-05-01" @default.
- W1995309330 modified "2023-09-25" @default.
- W1995309330 title "The graphical representation of ash liberation in milled coal" @default.
- W1995309330 doi "https://doi.org/10.1016/0140-6701(96)88368-8" @default.
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