Faqs
Classification of sorting machines
The spiral classifiers mainly include high weir type single spiral and double spiral, low weir type single spiral and double spiral, as well as submerged type single spiral and double spiral. The low weir type is rarely used nowadays, and the main types are high weir type and submerged type. [1]
The low weir type overflow weir is lower than the rotating axis of the spiral. This type of classifier has a small settling area and is only used in actual production for washing sand ores and coarse particles with little mud, and is rarely applied in the grinding cycle. The high weir type overflow weir is higher than the rotating axis of the spiral but lower than the upper edge of the overflow end spiral. This type of classifier has a smaller settling area than the low weir type, and the weir height can be adjusted within a certain range, that is, the area of the settling zone can be adjusted and changed within a certain range, thereby enabling the adjustment of the particle size of classification. It is a commonly used equipment in the grinding cycle.
Submerged type - At the overflow weir end, there are 4 to 5 spiral blades that are completely submerged in the pulp. This type of classifier has a large settling area and a deep classification tank, and the stirring of the spiral has a relatively small impact on the surface of the pulp. Therefore, the classification surface is stable, the overflow volume is large and fine. It is often used as a classification equipment for fine grinding or the second stage grinding in the production of the beneficiation plant.
Conical centrifugal air flow classifier. Under the action of centrifugal force, this equipment realizes the separation of coarse powder and fine powder. The finished product particle size can reach about 0.95 um at the most, and the classification accuracy D75/D25 can reach 1.16. This equipment has no moving parts. The angle of the guide plate can be adjusted within 7 to 15 degrees. The equipment structure is compact, the classification efficiency is high, and the operation is safe and reliable. [2]
MS Vane Classifier. The MS Vane Classifier is a standard-shaped classifier developed and produced by Japan. Figure 1 shows the schematic diagram of this machine. The main feature of this machine is that the powder is brought into the classification chamber by the airflow and then separated under the action of the secondary air sieve. The fine particle grade is subjected to the dual effects of the centrifugal force field generated by the high-speed rotation of the classification wheel and the centripetal force produced by the exhaust air at the rear of the classifier. Due to the centripetal force being greater than the centrifugal force, the fine particles are discharged through the fine particle discharge port. On the contrary, the coarse particles are discharged through the coarse particle discharge port because they are subjected to a greater centrifugal force.
