| Editors: | Kongoli F, Kumar V, Aifantis K, Pagnanelli F | 
| Publisher: | Flogen Star OUTREACH | 
| Publication date: | 21 December 2016 | 
| Pages: | 220 pages | 
| ISBN: | 978-1-987820-54-6 | 
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) | 
 
Modern mining of minerals is becoming an increasingly complicated technological and ecological problem. It can be explained both by worsening of geological conditions of mining and by a specific character of the mining industry, which, in contrast to processing branches of industry, intrudes into one of the principal components of nature, – the Earth's interior.
The only possibility is the use of the Archimedes law for delivery minerals from a mine to the surface by its floating in a motionless medium of a higher density. Besides, the choice of a liquid medium with density intermediate between those of the mineral (e.g., coal) and the waste rock for the realization of such transport process provides a real possibility of combining the delivery of produced coal from a mine to the ground surface with its simultaneous beneficiation. 
The product is left to float in a liquid medium, followed to the place destination by rafting.
After complete regeneration, the fluid is returned to the head of the process.