Abstract
ABSTRACT Particle size measurements of oil sands solids by laser diffraction are reviewed together with the process used at Syncrude to replace old laser diffraction instruments with current ones. The new instrument has a much broader measurement range and by accounting for fine particles (smaller than 1 μm) it addresses a major limitation of earlier instruments. Results from both laser diffraction instruments are compared so that new results can be related to our historic database. Results from the new instrument are also compared with those from a disc centrifuge and the hydrometer method. It is concluded that the new instrument can be used for samples that were previously analyzed by these other techniques and so is the preferred particle size method for almost all oil sand processing solids.
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