Kourosh Motevalli - Instructor Applied Chemistry Department Fundamental Sciences Faculty Islamic Azad University
Zahra Yaghoubi - Assistant Professor Industrial Faculty Islamic Azad University South Tehran Branch Tehran Iran

In this letter, the important role of rare earth magnets in mineral processing has been investigated. we know very well that New advances in permanent magnet technology have led to the development of a new generation of permanent rare earth industrial magnetic separators. The excellent separation efficiency of these rare earth magnetic separators has resulted in elevationof super processing conventional electromagnetic high-intensity magnetic separators for many applications. One example of this technology is the cobalt nano particle magnetic separator which has been successfully installed for mineral processing applications. Also, in this letter, utilizing the Cobalt nano particles in a novel application of removing ash and pyritic sulphur from coal samples is presented.

Coal, high-intensity magnetic separation, magnetic properties, industrial minerals, cleaning