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Ultrafine grinding of several industrial minerals by the attrition grinding process.

Authors
Stanczyk-MH; Feld-IL
Source
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 7641, 1972 Jan; :1-25
Link
NIOSHTIC No.
10008881
Abstract
Ultrafine grinding of the industrial minerals, mica, pyrophyllite, talc, marble, barite, and fluorite was accomplished using the Bureau- developed and patented attrition-grinding process. The materials, representing minerals of diverse physical characteristics, were batch ground in a 10-inch-diameter machine using statistically designed experimental test programs. The tests were made to determine large effects of variables such as feed pulp density, grinding medium size, and quantity of the electrical energy consumed during grinding on product particle size and bulk density. In designing the test programs, it was assumed that there was no interaction between the variables. Relatively coarse commercial flotation concentrates of mica, barite, and fluorspar and mine-run products of pyrophyllite, talc, and marble were readily ground into subsieve size ranges. Considering the great amount of particle size reduction obtained, the electrical energy requirements for grinding were very low. In general, the test results indicated that the best conditions for particle size reduction were approached when grinding with the coarser fraction of sand grinding media, the higher sand-to- mineral weight ratio, and the higher feed pulp density. Work done in cooperation with the University of Alabama.
Publication Date
19720101
Document Type
IH; Report of Investigations
Fiscal Year
1972
NTIS Accession No.
PB-210983
NTIS Price
A03
Identifying No.
RI-7641
NIOSH Division
TURC
Source Name
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 7641
State
AL
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