Study on Frow Property Evaluation of High Flowability ABC Powder

Abstract

The ABC powder used for a fire extinguisher shows high flowability. The evaluation about a flowability of such powder was very difficult and was not able to show the difference in the property by the measurement of the existing repose angle. Then, in this study, we considered about a new evaluation method of the powdery flowability indicating the high flowability using ABC powder. That rotated a cylindrical container after the tapping, and an angle when powder collapsed was measured and was named the rotational collapse angle. As a result, the rotational collapse angle was able to clarify a flowable difference for high flowable powders such as the ABC powder. Furthermore, it was found that the rotational collapse angle could determine with the right and wrong of the emission test of the fire extinguisher beforehand.