Ball mill
What is a ball mill?
A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing processes, paints, pyrotechnics and ceramics. size reduction is done by impact as the balls drop from near the top of the shell.
How much does one cost?
2000 to 3000 dollars for a lab scale ball mill.
Where to get one?
http://www.bionicsscientific.com/laboratory-mixers/laboratory-ball-mill.html
http://www.retsch.com/products/miling/ball-mills/planetary-ball-mill-pm-100-cm/