At home and abroad dressing grinding mill is still commonly used devices, including lattice-type and overflow-type ball mill is used for grinding non-metallic mineral beneficiation equipment, Short ball mill is widely used in calcite, dolomite, quartz, zircon and other non-metallic ore fine grinding and fine grinding. For the mill works a lot of people do not know where SBM will provide you with detailed answers, so that we use in the purchase and operation of a device to be aware of in the future.
Ball Mill working principle
When appropriate speed operation, the round ball with grinding media and materials, under the action of centrifugal force and frictional force is raised to a certain height, due to gravity from the tube wall along a parabolic falling trajectory. Then, they are also being raised to a certain height, and then fall along a parabolic trajectory, again and again, so that in the material between the grinding media role was crushed by the impact. Meanwhile, the rolling and sliding wear mine medium, the particles by grinding, friction, shear effect and grated.
Ball mill is simplified, and out of the hollow shaft and the grinding material and some level of composition, simplified for the long cylinder, cylinder with grinding, cylinder of steel plate, with steel liner and Simplified fixed, usually steel grinding Built ball, then loaded with different diameters and a certain percentage of the barrel, grinding steel section can also be used, to be selected according to the granularity of the grinding, the material from the mill feed end of the hollow shaft into the cylinder body, when the ball turning Simplified, grinding due to inertia and centrifugal force, friction force, so that it is near the posts on the cylinder liner cylinder away, when it was brought to a certain height, due to its own gravity has been thrown down, falling grinding like projectile material as the cylinder body to crush. Material from the feed device evenly into the mill first position into the compound empty-axis spiral, the warehouse has ladder liner or corrugated liner, built with different specifications steel ball, rotating cylinder produces centrifugal force to the ball a certain height After the fall, have severe impact on the material and abrasive. Material in the first position kibble, after single-compartment plate into the second warehouse, the warehouse lined with flat lining, the steel ball, the material to further grinding. Powder through the discharge grate plate to complete the grinding operation. In the course of rotation of the cylinder, grinding media have dropped the phenomenon in the process of falling to the material to abrasive action, in order to effectively use abrasive effect on the particle size of materials to teach large general purpose grinding on when the mill body cylinder with diaphragm plate divided into Sec, namely a two positions, the material was crushed into the first position when the ball, the material enters the second position when the steel side of the grinding material, grinding the material passing from the discharge end of the hollow Axis discharge, the feed material for grinding small particles, such as when the sand II slag, coarse ash, mill shell not to set partitions, a single-chamber tube mill, grinding volume of steel sections can also be .
Wet ball mill works with other devices so what's different?
Structure and working principle of a wet ball mill with the same general, but because carrying medium is water, the composition and operation of the system has two distinctive features: (1) a recirculation tank, recirculating pump and constitute a two-stage cyclone separation system to adjust the fineness of the product slurry and concentration of solid particles; (2) the system all the boxes tanks, pumps, piping, mixers use the lining material like plastic or corrosion protection, pipe joints sealed with mechanical seal material plus . Cyclone limestone particles are separated from the device key, the general structure with the same centrifugal cyclone. Limestone slurry into English from the tangential rotation under the action of centrifugal force, the larger particles to the tube wall being left falling out by the cyclone underflow, the small size of the particles from the center upwards from the overflow tube out. The lower part of the cyclone underflow nozzle is removable, by using different diameter nozzles, to adjust the ratio of underflow and overflow. On the separation efficiency of the cyclone inlet slurry solids depend on the structure of the cyclone (tube diameter, the size of the entrance, the center tube diameter and insertion depth, etc.) and the operating conditions (inlet slurry velocity, the entrance of solid particles, etc.). Solid particle inlet in certain conditions, increase the speed of the slurry inlet to improve the separation efficiency of the cyclone, whereby the fine solid particles overflow.