Effect of Operating Parameters on the Mechanical Activation Process of Mica Powder

• Published in: Transactions of the Indian Ceramic Society Vol. 71; no. 3; pp. 143 - 150
• Main Authors: Andric, L, Acimovic-Pavlovic, Z, Trumic, M, Kostovic, M, Nadezda, Calic N
• Format: Journal Article
• Language: English
• Published: Taylor & Francis Group 01.09.2012
• Subjects: Ceramics; Comminution; Indian; Mechanical activation; Mica; Micronization grinding; Powder; Rotor speed; Rotors; Ultra-centrifugal mill with a peripheral comminution path; X-rays
• ISSN: 0371-750X; 2165-5456
• DOI: 10.1080/0371750X.2012.738483

Mechanical activation of mica is a great technological and technical problem because of their specific crystallochemical structure. This is dependent upon the type of equipment used and the type of disintegration process. The paper presents the investigations of kinetics of operational parameters, effect on properties and structure of powder mica, etc. The mica sample was subjected to mechanical activation in ultra-centrifugal mechanoactivator with a peripheral comminution path. During the investigation, some operating parameters, viz. number of rotor revolutions (rpm), sieve mesh size (µm) and current intensity (A), and some technological parameters, viz. time of mechanical activation, t (min), circumferential rotor speed, v (m.s −1 ), capacity of ultra-centrifugal mechanoactivator, Q (kg.h −1 ) and specific energy consumption, W e (kWh.t −1 ) were monitored. Analyzing the results it can be concluded that the rate of mechanical activation of mica was increased with the increasing load and rotor revolution of ultra-centrifugal mechanoactivator with peripheral comminution path. Under these conditions, the powder mica was transformed into amorphous state. It was confirmed by X-ray and thermal analyses.