ASSESSMENT METHOD flowability of powdery substances AND DEVICE FOR ITS IMPLEMENTATION

摘要

1. A method of evaluating the flowability of powdery substances comprising a process free discharge of the substance from the funnel-shaped fixed volume hopper through an opening in its base with the determination process parameter characterizing the flowability of the substance, characterized in that substance is dosed alternately in several containers of the same size, and as parameter estimation process flowability determine the relative error of the mean measured value of the mass portions dosed substances - relative spread sample, which is calculated by the formula where C - relative spread sample,%, m- arithmetic mean value of the mass portions dosed substances g; Δm- arithmetic mean deviation of the mass portions dosed substance from its average value (m), D.2 . An apparatus for carrying out the method according to claim 1, consisting of a funnel-shaped hopper with a hole at the bottom and the flap, when opened wherein the test substance from the hopper can fall out freely, characterized in that it comprises two funnel-shaped hopper, formed as through holes in the hopper plate below wherein a gap is placed another, a thrust plate with two through holes, the axes of which are offset relative to the axes of holes bins, and the flap is designed as a gutter-plate with two rows of identical holes ERSTU to which is fixed the bottom desk plate with placed on it a receptacle for a test substance, whose number equals the number of holes in the plate, the central section, the plate-mullion moves within the gap between the hopper and the reference n