Measuring and testing – By abrasion – milling – rubbing – or scuffing
Patent
1987-01-27
1988-08-09
Noland, Tom
Measuring and testing
By abrasion, milling, rubbing, or scuffing
73866, 374 31, G01N 356
Patent
active
047619902
ABSTRACT:
Particulate material such as fluidized bed particles, catalytic particles, and particles used in mechanical processes are measured to determine their attrition rate by providing an apparatus comprising a generally cylindrical housing having a rotary impeller disposed eccentrically in the housing for continuously agitating and impacting a quantity of particulate material being measured. A screen is formed in a sidewall of the housing and a vacuum pump is operably connected to the interior of the housing through the screen for continuously withdrawing fines generated during the attrition rate measurement process. Periodic sampling of the quantity of fines withdrawn is used to measure the mass of fines withdrawn per unit time. An equal mass of makeup material is admitted to the housing chamber after each sampling step until an equilibrium attrition rate is determined.
REFERENCES:
patent: 3636772 (1972-01-01), Bennett
patent: 4143539 (1979-03-01), Baillie
patent: 4625552 (1986-12-01), Johnson
patent: 4633712 (1987-01-01), Scieszka
patent: 4658631 (1987-04-01), Swan et al.
patent: 4702116 (1987-10-01), Gawol et al.
Atlantic Richfield Company
Martin Michael E.
Noland Tom
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