Thursday, June 23, 2011

Ball mill work basic principle

Ball mill work basic principle
The ball mill mainly by cylindrical barrel, cover, bearings and big driving gear ring and etc. Parts.
Ball Mill
Cylinder: mm in diameter which 150mm in for the steel ball -- or steel bar, called grinding medium, and its load quantity of effective volume for the entire cylinder of 25% -- 50%.
Cover: the cylinder cover, using the screws on both ends with a cylinder body ends flanges connection, with a hole in the middle of the housing, called the hollow shaft neck.
Bearing: hollow in the bearing, trunnion supporting cylinder body to turn.
Big gear circle: in barrel at a fixed.
Grinding process is introduced
Grinding operation is performed within the ball mill simplified, cylinder grinding interface with the rotation of the cylinder body was brought to a certain height, weight and whereabouts, medium due to install in the cylinder body ore are medium heavy wallop; On the other hand, because in the cylinder body grinding interface along the axis of revolution and the cylinder body rotation, and in between grinding interface cylinder body contact area and produce the extrusion and grinding of minerals, which strip force grinding ore.

The ball mill ball (grinding medium) when the cylinder rotate namely was taken up and rise to a certain height, because the gravity ball itself along certain track, at last fall.In the area of steel ball of the two force by: one is the rotation YuGangQiu since the force was tangent direction; As a side and ball diameter with relative says the forces opposite force, the force may be caused by gravity and ball itself caused by the downward slide.These two forces, ball will constitute a pair for ball was, because couples exerting on the annular in cylinder and adjacent squeezing the middle, so couples exerting on the annular ball will vary in size between the ball ball with cylinder of friction, made in revolution axis movement within the region since last fall in the area fell, thrown on the cylinder body in the ore produce powerful impact, will ore broken. Can say, the grinding ore main cylinder body is influenced by grinding strip force, impact and the role of extrusion pressure by grinding.

Ball mill the parting

The overflow type ball mill: with the barrel of rotation and grinding interface motion, ore, etc material broken after gradually spread, finally to right from the hollow shaft neck right out, hence its name overflow.
Grate ball mill: such machines in discharging end a grid board, set by several pieces of fan-shaped orifice plate composition, its lift for 7mm 20mm hole width, ore through the lift - into grid plate and cover holes between inside the space, then lifted board by the material upward, material along the heave board declined to go through tapered block right to hollow shaft neck eduction cake layer.
Wind discharging ball mill: material from feeding mouth into ball mill, grinding interface with grinding of material impact after materials from grinding machine, the import export gradually to move, outlet and duct connection, in the system in tandem with separator, classifier, dust catcher and fan imports, when wind discharging begins to run in the opposite, ball mill in low negative pressure, the broken by grinding thin materials after discharge with wind from mouth in piping systems of coarser by classifier will be resumed after the granular separation, has sent the ball mill imported materials are grinded by separator separation recycling.
The ball mill lectotype attention matters
1. To know mineral hardness
2. Likely try to choose energy-saving ball mill
3. Want to know the fineness of mineral requirements according to production requirement
4, appropriate choice ball mill diameter and length
5. Best with your minerals to the professional ball mill relative manufacturers buy
6. Request manufacturers in your enterprise a local market share
7. Choose a new generation of transformation type ball mill, the speed and the touch several different
8. According to their mineral requirements, choose the fineness of the aperture and points shut the board position
9. According to the ball mill storehouse of lining board of the price, the requirements of material and thickness of steel mill body selected
10. A big gear mill, small teeth, and motor, the module manufacturer. Machine of filamentous

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