| 11. | The simplest method of separating ore from gangue consists of picking out the individual crystals of each.
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| 12. | This is typically associated with gangue sulfides of pyrite, with subordinate pyrrhotite and other base metal sulfides.
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| 13. | Silicate gangue minerals include actinolite, pyroxene, tourmaline, epidote and carbonate-barite assemblages also reported.
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| 14. | The washwater spirals separate particles more easily but can have issues with entrainment of gangue with the concentrate produced.
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| 15. | Froth flotation is typically used to separate coal particles from ash or particles of valuable minerals from gangue material.
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| 16. | At about 13.8 fracturing soon followed, altering the dacite and depositing ore minerals and gangue in the veins.
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| 17. | Often, the nature of the gangue is important, as clay-rich native copper ores prove difficult to liberate.
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| 18. | In a similar fashion to streamworking, much use was made of water for the removal of the overburden and gangue.
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| 19. | In dense media separation a media is created with a density in between the density of the ore and gangue particles.
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| 20. | A key objective in the metallurgical treatment of any ore is the separation of ore minerals from gangue minerals within the rock.
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