Coarse concentrated iron ore for catalytic purposes

摘要

An iron ore concentrate is made having at least 60% -6 to +14 mesh and no more than about 1% -20 mesh, by a process preferably employing a small counterflow sizer on a product obtained from the concentrate of a spiral concentrator through which is processed a high-iron mill product or partially concentrated coarse feed. The product of the counterflow sizer is agitated to separate cohering particles and then further concentrated.