Measuring and testing – Instrument mechanism or transmission – Rate of change
Patent
1984-11-09
1987-01-06
Levy, Stewart J.
Measuring and testing
Instrument mechanism or transmission
Rate of change
73 7, 73794, 73841, G01N 358, G01N 324
Patent
active
046337121
ABSTRACT:
Apparatus for determining the mechanical properties of particulate material comprises an outer member defining a cylindrical cavity, and an inner member rotatable in the cavity, the inner and outer members together defining a pulverizing chamber. The inner member has a pressure-bearing face facing the pulverizing chamber and a diametrically disposed groove in which a steel blade can be fitted so as to protrude into the pulverizing chamber. In use, the inner and outer members are rotated with respect to one another, while the particulate material in the pulverizing chamber is placed under axial compression. The torque transmitted from one member to the other, as well as the axial force transmitted from one member to the other is measured during the relative rotation, and these measurements used to determine the mechanical properties of the coal as well as the wear characteristics of the blade. There is further disclosed apparatus of a similar construction, for pulverizing a particulate material continuously, on a production scale, an auger being provided to feed the particulate material continuously into the pulverizing chamber, and there being an annular gap between the inner and outer members, through which pulverized material can escape.
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Levy Stewart J.
Noland Tom
University of Cape Town
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