Energetics of mechanical activation – Application to ilmenite

Sasikumar, C and Mukhopadhyay, N K and Mehrotra, S P (2009) Energetics of mechanical activation – Application to ilmenite. Minerals Engineering, 22 (6). pp. 572-574.

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An attempt is made to measure the energy stored in the material during mechanical activation and its manifestation in various forms (defects, new surfaces and interfaces, strain and structural disorder) through direct energy measurements, calorimetry, surface area and surface energy measurements. The elastic strain, grain size and extent of amorphisation is estimated from XRD analysis. The strain energy is calculated using the theory of elasticity and the amorphisation energy from thermodynamic calculations. For ilmenite, the energy transferred to the material is about 6% of the specific energy consumption in 4 h of planetary milling. A major part of the energy is stored as elastic strain energy, structural disorder and in point and line defects whereas the energy stored in additional surfaces and grain boundaries are comparatively much lower.

Item Type:Article
Official URL/DOI:http://dx.doi.org/10.1016/j.mineng.2009.01.013
Uncontrolled Keywords:Oxide ores; Grinding; Particle size; Surface modification; Mineral processing
Divisions:NML Chennai > Mineral Processing
ID Code:123
Deposited On:14 Oct 2009 11:40
Last Modified:09 Feb 2012 11:03
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