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008181116t19881989oncad  #ob   f000 0 eng  
020 |z0660131218
040 |aCaOODSP|beng
041 |aeng|bfre
043 |an-cn-nk
0861 |aM38-13/88-5E-PDF|zM38-13/88-5E
1001 |aPetruk, W., |d1930-
24510|aOre characteristics that affect breakage during grinding |h[electronic resource] / |cW. Petruk and M.M. Smith.
260 |aOttawa : |bMineral Sciences Laboratories, |c1988, c1989.
300 |av, 20 p. : |bill., graphs
4901 |aCANMET report ; |vCM88-5E
500 |a"May 1988."
500 |aTitle from cover.
500 |aIssued also in French under title: Caractéristiques du minerai influant sur la fragmentation pendant le broyage.
504 |aIncludes bibliographical references.
520 |a"A base metal ore from the New Brunswick No. 12 deposit in the Bathurst area, New Brunswick, was studied to determine the mechanics of ore breakage during grinding. The ore was ground for different periods of time in a laboratory ball mill, and both the unbroken ore and ground products were analyzed by a variety of image analysis techniques, including modifications of fractal analyses. The results show that the mode of breakage is strongly influenced by the behaviour of pyrite. Initial grinding breaks pyrite along grain boundaries (i.e., preferential breakage), and the process continues until most of the poorly to moderately bonded pyrite grains have been separated. Further grinding breaks pyrite across grain boundaries (random breakage) and chips edges off particles. This observation indicates that liberation of interstitial minerals among pyrite in base metal ores is more dependent upon preferential breakage, along pyrite grain boundaries, than upon random breakage of the ore, as generally assumed. Consequently, the interstitial minerals among pyrite, which are generally smaller than the pyrite grains, will be liberated at a coarser grind than would be expected if the ore broke randomly"--Abstract, p. i.
546 |aIncludes abstract in French.
69207|2gccst|aMinerals
69207|2gccst|aChemistry
69207|2gccst|aScientific research
7001 |aSmith, M. M. |q(Marian McNally)
7101 |aCanada. |bNatural Resources Canada.
7102 |aCanada Centre for Mineral and Energy Technology.
7102 |aMineral Sciences Laboratories (Canada)
77508|tCaractéristiques du minerai influant sur la fragmentation pendant le broyage |w(CaOODSP)9.864801
830#0|aCANMET report ;|vCM88-5E.|w(CaOODSP)9.852792
85640|qPDF|s1.36 MB|uhttps://publications.gc.ca/collections/collection_2018/rncan-nrcan/m38-13/M38-13-88-5-eng.pdf