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United States Bureau of Mines USBM

Trade conflicts in the world phosphate market in 1989 did not prove to deter phosphate rock production, and world production increased slightly to approximately 163 million tonnes, according to the United States Bureau of Mines (USBM) [45]. In 1990 world production fell to about 154 million tonnes. U.S. production decreased about 4 million tonnes. With the advent of significant social changes in the FSU and associated economic disruption, FSU production declined from about 35 million tonnes of phosphate rock in 1990 to about 29 million tonnes in 1991. Overall world production... [Pg.112]

USBM. 1988. Minerals yearbook. Vol. 1. United States Bureau of Mines, 29-49. [Pg.395]

Another ball mill test worth mentioning here is the USBM (United States Bureau of Mines) Ball Mill Test57 which is in some respects similar to the Bond ball mill test. The ball mill is 8 x 8 in (203 X 203 mm — diameter x length) and fitted with three lifter bars mounted longitudinally to the inside wall equally spaced around the cylinder. The charge is 100 balls one inch (25.4 mm) in diameter each and the coal charge is 500 g. The mill is rotated at 40 revs/min and a trip counter is used to count the number of revolutions completed. [Pg.102]

USBM United States Bureau of Mines sample... [Pg.25]

See other pages where United States Bureau of Mines USBM is mentioned: [Pg.136]    [Pg.21]    [Pg.278]    [Pg.136]    [Pg.21]    [Pg.278]    [Pg.777]    [Pg.778]    [Pg.777]    [Pg.777]    [Pg.778]    [Pg.276]    [Pg.445]   
See also in sourсe #XX -- [ Pg.12 , Pg.13 ]



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Bureau of Mines

Mines, Bureau

Of United States

USBM (

United States Bureau of Mines

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