Abrasive Grader
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Operates pebble mill to grind emery, rouge, and other
abrasives and separates them according to fineness by water
suspension method: Examines abrasive under microscope to
determine grinding time required, and grinds abrasive in pebble
mill. Turns valve to allow ground particles and water to flow
into aigtator tank.
Presses button to start agiattor which stirs
particles into suspension.
Stops machine and determiens by
microscopic examination when particles of particular grade have
settled below tank outlet. Opens stopcock to allow particles
remaining above the outlet to descend into vat.
Repeats
separation process for other grades, regrinding as required.
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Abrasive Grader
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