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Ball mill
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Introduction of Ball Mill
Ball mill is an energy-saving grinding device, is widely used in mineral processing, building materials and chemical
industries. It grinds material by rotating a cylinder with steel grinding balls, causing the balls to fall back into the cylinder
and onto the material to be ground. The rotation is usually between 4 to 20 revolutions per minute, depending upon the
diameter of the ball mill machine. The larger the diameter is, the slower the rotation is. If the peripheral speed of the ball
grinding mill is too great, it begins to act like a centrifuge and the balls do not fall back, but stay on the perimeter of the
mill.
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Ball Mill
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Ball mill is the key equipment for re-crushing the materials after they are primarily crushed. Ball mill is widely used for
the dry type or wet type grinding of all kinds of ores and other grind-able materials in cement, silicate product, new
building material, refractory, fertilizer, black and non-ferrous metals and glass ceramic industry.
Ball Mill Machine Structure
Ball Mill machine is composed by feeding part, discharging part, turning part and driving part (reducer, small driving gear,
electric motor and electric control). The quill shaft adopts cast steel part and the liner is detachable. The turning
gearwheel adopts casting hobbling process and the drum is equipped with wear-resistant liner, which has good wear-
resistance. The ball grinding mill is with stable and reliable working condition. Moreover, according to different materials
and discharging methods, there are dry ball mills and wet ball mills for choice.
Ball Mill Application
Ball mills are the key equipment for grinding after the crushing process, which is widely used in the manufacture
industries, such as cement, silicate, new building material, refractory material, fertilizer, ferrous metal, nonferrous metal
and glass ceramics and can be used for the dry and wet grinding for all kinds of ores and other grind-able materials. To
achieve a reasonable efficiency with ball grinding mills, they must be operated in a closed system, with oversize material
continuously being recirculated back into the mill to be reduced. Various classifiers, such as screens, spiral classifiers,
cyclones and air classifiers are used for classifying the discharge from ball mills.
Working Principle of Ball Mill
This machine is a horizontal type cylinder rotary device and outside the cylinder there is drive gear which drives the
cylinder to rotate during the working process. Materials spirally and evenly go into the first cabin of the grinding machine
through the feeding hollow shaft from the feeding device, and inside the first cabin, there are ladder lining boards or
ripple lining board in which there are many steel balls with different specifications. The cylinder rotates and produces
eccentric force to bring the steel balls to a certain height, and then the steel balls will fall down to impact and grind the
materials. After being coarsely ground in the first cabin, the materials will go through the single-layer partition board and
into the secondary cabin in which there are flat lining board, and in the lining board there are steel balls to further grind
the materials. Finally the powdery materials will be discharged from the discharging grating bar to complete the powder
grinding process.
Ball Mill Features
· Continuous operation and large capacity.
· High utilize ratio and low consumption of modifying agent
· With the function of modifying and dispersion, it fits for various powders.
· High modifying efficiency without changing the granulate shape.
· Excellent sealing system, no environment pollution
· All works are finished in one machine, easy to operate.
Technical Parameters
Model Cylinder
Diameter
(mm)
Cylinder
Length
(mm)
Motor Model Motor
Power
(kW)
Motor
Revolu on
(r/min)
Length
(mm)
Width
(mm)
Height
(mm)
Capacity
(t/h)
Effec ve
Volume
(m3)
MBY0918 900 1800 Y225M-8 22 730 4980 2370 2020 0.62~3.2 0.9
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