中国矿山工程

Through the detailed process mineralogical study of a certain low grade niobium ore, it can be found that the ore has complex structure, dominated by porphyritic structure and trachytic texture. It has such characteristics that the rock is composed of feldspar and pyroxene microlite; metal minerals and gangue minerals coexist and are mutually inclusive; the valuable element niobium is not found as an independent mineral but dispersed in pyroxene, feldspar, magnetite, amphibole, etc.; pyroxene is the main mineral for niobium recovery. Through beneficiation tests, the combined process of “magnetic separation for pre-concentration-rough concentrate leaching” was recommended for extracting the valuable element niobium from the ore; The leachate containing 87.44mg/L niobium can be obtained from this process and the recovery rate of niobium is 63.12%.