shape
According to the shape of the muscovite crystal and the gangue, the ability to pass through the sieve slit and the sieve hole in the sieve is different, so that the muscovite and the gangue are separated. When sorting, a sieve having two or more different sieve surface structures is used, generally the first sieve mesh is strip-shaped; the second sieve mesh is square. When the ore enters the sieve surface, due to vibration or rolling action, the flaky muscovite and small gangue can leak from the strip screen to the second screen; because the second layer is sieve, the gangue can be screened. Leave a sheet of muscovite. The shape beneficiation method has the advantages of simple process, less equipment, high productivity, good sorting effect, etc., and thus has been widely used in muscovite mines.
Method flow
a, flotation
Sorting according to the difference in surface physicochemical properties of muscovite and gangue. After the ore is crushed and ground, the muscovite monomer is dissociated. Under the action of the agent, the muscovite becomes a foam product and is separated from the gangue. The muscovite flotation can be carried out in an acidic or alkaline slurry, and the long carbon chain amide cation and the fatty acid anion are muscovite collectors. In the muscovite flotation process, three sections of rough selection and three sections are selected to obtain the muscovite concentrate. Therefore, muscovite ore float is used to recover muscovite and fine-grained mica below 14 mesh in pegmatite and muscovite schist. In China, muscovite ore flotation has not yet been produced and applied.
b, wind selection
Muscovite wind selection is achieved through special equipment. The process is generally: crushing→sieving classification→wind selection. After the ore is crushed, the muscovite basically forms a flaky shape, and the gangue mineral feldspar, quartz and the like are in the form of massive particles. Accordingly, the multi-level grading is used to pre-divide the selected materials into narrower granules, and according to the difference in the levitation speed in the airflow, special air-conditioning equipment is used for sorting. The wind selection method is applicable to areas where water is scarce and has been used for actual production.
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