The very small margin, which remains for the producer between mining costs and receipts for a low grade ore such as pyrites, often ... Kiln aquot; or aquot; lump aquot; ore may vary from lumps that will not pass a 4aquot; ring down to material that is about 0.5 inches in diameter, ... Many buyers purchase ore as run of mine and do their own sizing.
|Title||:||Mines Branch Monograph|
|Author||:||Canada. Mines Branch (1950- )|