mineral processing metallurgy britannicamineral processing, art of treating crude ores and mineral products in order to separate the valuable minerals from the waste rock, or gangue. it is the first process that most ores undergo after mining in order to provide a more concentrated material for the procedures of extractive metallurgy.the primary operations are comminution and concentration, but there are other important operationsdictionary of abbreviations and acronyms injan 10, · online positioning user service (us ngs); online processing user service or oregon ormap oregon map (organization) oq orthophoto quadrangle orbimage orbital imaging corp. ore. oregon orh office of the regional hydrologist orid ortho rectified image data orn ontario road network orrh office of the regional research hydrologist
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