Pre-treatment investigation of lithium bearing granite ore using high voltage electric pulse

Published in Proceedings of the IMPC2020 Congress, SAIMM

Filippov, Tripathy, Filippova, Diot


Among different pre-treatment methods, a high voltage electric pulse was recently developed and is gaining popularity due to multi-benefits such as pre-weakening along the grain boundaries, as well as size reduction to improve the liberation characteristics.

In this paper, the pre-treatment using high voltage electric pulse of lithium-bearing granite ore was studied to understand the morphology through texture, as well as the friability of the particles.

To understand the phenomena, SELFRAG, a laboratory facility used for generating high voltage electric pulse and key operating variables were varied. The role of applied voltage (94.5-195.5 kV), number pulse (3-87), and the frequency of pulse (1.3-4.7 Hz) was varied to understand the liberation characteristics as well as energy consumption.

Characterisation tools such as optical, and electron microscopy were used to describe the pre-weakening phenomena through textural features. Further, the energy required to break the particle to finer sizes as well as friability were determined and described.


Pre-treatment, high voltage electric pulse, lithium, liberation, grinding


L.O.Filippov*,S.K.Tripathy, I.Filippova,and F.Diot, Université de Lorraine, GeoRessources, CNRS, UMR 7359, F54505, Nancy, France

*Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

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