[Mica beneficiation] Analysis of the beneficiation process of a certain mica ore!

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Mica is a transparent flake-shaped non-metallic mineral. It is an industrial mineral with unique properties, wide application fields and high value. Before industrial application, it is necessary to conduct mineral processing and purification to obtain mica concentrate. So how to beneficiate and purify mica ore? The editor below takes a certain mica mine as an example to introduce its mineral processing technology process!

Ore properties analysis of a certain mica mine

The main minerals in the raw ore of this mica mine are muscovite, biotite and a small amount of sericite. The gangue minerals are mainly quartz, hematite and fiber. Iron ore and garnet, etc.

(picture from the Internet)

The mineral processing test analysis shows that the mica mineral is composed of flake aggregates. Mainly, some parts are irregular granular and fine cryptocrystalline scale-like aggregates. Muscovite and biotite grow in interlayers and intersect with each other. Sericite particles are small and distributed around muscovite and biotite, making it difficult to sort. The interlocking relationship between the three is complex. Quartz and other gangue minerals are basically evenly distributed in medium and fine particles, which are easy to dissociate, and often have a symbiotic relationship with mica. They are seriously associated with each other and will have a negative impact on the mineral processing and purification indicators. It is an easy-to-dissociate and difficult-to-select mica mineral. .

Design of a certain mica ore beneficiation process

Finally, after mineral processing test analysis, the mica The mine has designed a process flow of crushing-grinding-grading-gravity-desliming.

Crushing: One-stage crushing is used, using Jaw crusher carries out primary crushing of the raw ore to less than 1mm, and then feeds it to the vibrating screen for screening, and sends the different particle sizes obtained after screening to the grinding system; p>

Grinding:A one-stage closed-circuit grinding process is adopted, using a wet overflow ball millFine grinding is carried out, and the ore particle size is ground to -0.074, accounting for 75%;

Grading:Use a spiral classifier to classify the ground products, and the overflow is qualified materials. The next step, while the underflow needs to be returned to the ball mill for re-grinding;

Gravity selection:The shaking table gravity selection method is used, with a stroke of 20mm, a stroke of 280 times/min, and a lateral inclination angle of 2°, longitudinal inclination angle 0.5°, ore feeding volume 90kg/h, flushing water volume 45L/min;

Finally, through According to this mineral processing process, 2 different mica concentrates were obtained, one of which had a grade of 9.6%, a yield of 18.87%, and a recovery rate of 29.88%. This mica concentrate can be used as raw material for coatings and pearlescent mica.

Another type of mica concentrate has a grade of 6.8%, a yield of 46.92%, and a recovery rate of 51.33%. Its mica concentrate can be used for rubber fillers, etc.

The above is an introduction to the beneficiation and purification process of a certain mica ore. In the actual beneficiation plant, the specific beneficiation process needs to be determined according to the properties of the crushed mica ore. Therefore, it is recommended to conduct a beneficiation test and analysis first, and then Only by designing a suitable mica purification process and customizing suitable mica beneficiation equipment can we obtain an ideal return on investment.