17— THE ELilORK ORE COXCEXTRATIOX RROCESS. 

 Bv E. A. Blumk. 



Briefly the process is : — The ore to be concentrated is crnshed 

 by means of any wet crushing mill and the resulting pulp is sub- 

 jected to a process of agitation with a quantity of mineral oil. The 

 oil has the property of attaching to itself the particles of minerals 

 in the pulp whilst leaving the gangue untouched. The oil, carrying 

 its load of concentrate, is then removed and the concentrate is re- 

 covered by a centrifugal machine. The process, however, has so 

 far hardly been tried in South Africa. 



