Domestic sericite mine schist metamorphism region generally due to the formation of relatively simple mineral composition, mainly composed of quartz and sericite, each about 50% of the two components. The ore is in the form of a sheet, the scaly granitic crystal structure, the appearance has silky luster, the hand touch has a smooth feeling; the current processing methods are generally divided into dry and wet methods.
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Processing principle: Under the action of mechanical force and wind force, the ore produces impact and shear between the material and the medium, and the material particles become smaller.
Production process: raw ore → coarse crushing → dry grinding → product production equipment: dry mechanical grinding equipment such as mine grinding, vibration grinding, air jet grinding Processing advantages: simple process, convenient operation, large production volume and low manufacturing cost.
Product defects: The quality depends on the original ore grade, the fluctuation is large, and the mineral impurities such as quartz accompanying the process cannot be removed during the processing. The purity of the product is low.
Dry grinding, the serpentine structure of the sericite is destroyed, and the product has a small diameter-to-thickness ratio, which affects the functional properties of sericite.
The flaky sericite has certain elasticity and toughness, and the associated quartz has a high hardness (Mohs hardness is 7). It is difficult to process ultrafine. Dry grinding is not only energy-intensive but also difficult to achieve ultra-fine particle size. Generally between 100-325, some products can reach about 600 mesh, and the product wear value is large, affecting the use of downstream process equipment.
Seric mica processing method