MECHANICAL ACTIVATION OF TALC IN HIGH-ENERGY-SPEED ROTARY MECHANOACTIVATOR

摘要

By the mechanical activation-milling of the material, the size and the structure of its particles are changed and it comes to the increasing of the potential energy of the system as well as to the chemical activity of the material what is the result of an increased free surface and of the concretration of the grate defects, that is of the internal energy of the system. All these changes that are reached, show that new characteristic s of treated materials are got by mechanical activation. Controling the process of the mechanical activation and by purpose directing of the new characteristics of the activated materials, we can have the positive effects and use them in more technologies. Talc is important nonmetallic mineral raw material that is widely used as either the basic raw material, or as filler. This has stimulated if s technological investigation, as well as the investigation of if s physico-chemical characteristics. In this paper are shown experimentaly reached results of the physical-chemical characteristics of the talc during the process of the mechanical activation in high energetic mechanoactivators. In this paper, the optimum conditions of mechanical activation of talc in high-energy-speed rotary mechanoactivator and if s influence mechanical activation on a degree of Fe_2O_3 recovery by hydrometallurgical methods, are presented. The X-ray analysis of the obtained products showed that high quality talc with low content of Fe_2O_3 can be obtained by these physico-chemical processes.