Physicochemical Problems of Mineral Processing
Back to main page
Details
Article title :
Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill
Authors :
Ljubisa Andric, Anja Terzic, Zagorka Acimovic-Pavlovic, Ljubica Pavlovic, Milan Petrov
Volume :
50
Issue :
2
Keywords :
attrition mill, ultra-centrifugal mill, ultra fine grinding, mechanical activation, Talc
Abstract :
The efficiency of talc mechanical activation by means of two different mechano-activators - centrifugal and attrition mill is investigated in this study and the comparative analysis of the characteristics of obtained talc powders is presented. A new approach for obtaining high-grade talc concentrate with low Fe2O3 content is achieved through effect of mechanical activation of talc accompanied by hydrometallurgical process. The applied mechanical activation process conditions of ultra-centrifugal mill were defined by number of rotor revolutions, sieve mesh size, and current intensity. These operating parameters of the ultra-centrifugal mill were variable. Ultra fine grinding of talc in attrition mill (attritor) was carried out in various time intervals - from 5 to 15 min. The following technological parameters of the mechanical activation were monitored: time of mechanical activation, circumferential rotor speed, capacity of ultra-centrifugal mill, and specific energy consumption. The investigation was based on the kinetic model. The structure and behavior of activated samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and differential thermal analysis (DTA).
File:
ppmp50-2.433-452.pdf