Role of abrasion and corrosion in grinding media wear. Volume II

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5982616

Moore, J J; Iwasaki, I

The effects of slurry rheological properties on the erosive wear of grinding media and grinding efficiency (percent minus 325 mesh) have been studied in a laboratory ball mill using minus 10 mesh quartzite. A laboratory procedure was also utilized to evaluate the tendency for the slurry to coat the grinding media. Media wear decreased continuously with increasing percent solids while grinding efficiency was maximized at 60% solids. Slurry percent solids were found to be the critical factor affecting media wear in high percent solids slurries while other factors such as viscosity were more important at lower percent solids. This was demonstrated by the use of a grinding aid in a 70% solids slurry which resulted in only a small increase in wear (44 to 45.6 mg/ball) despite a significant reduction in viscosity (2359 mPa S at 75 rpm). Slurry relative viscosity was found to control the thickness of the slurry coating the balls which was in turn related in a direct linear manner to media wear. In terms of percent minus 325 mesh, the effects of viscosity and ball coating were in agreement with those presented in the literature. Scanning electron microscopic evaluation of ball surfaces and visual inspection of the movement of the ball charge both tended to support the theory of grinding in ball mills through nipping more so than attrition.

• Research Organization: Minnesota Univ., Minneapolis (USA). Mineral Resources Research Center
• DOE Contract Number: FC07-83ID12441
• OSTI ID: 5982616
• Report Number(s): DOE/ID/12441-T1-Vol.2; ON: DE86009472
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
COMMINUTION
DISPERSIONS
GRINDING
MACHINING
MINERALS
MIXTURES
ORE PROCESSING
PROCESSING
RHEOLOGY
SLURRIES
SUSPENSIONS
WEAR