This presentation includes all the relevant details about the ball mills

1. Ball Mills
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Group NO 02

2. Contents
• Introduction
• Structure
• Principle
• Advantages
• Disadvantages
• Applications
• Manufacturers
• Questions
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3. Introduction
• Mostly used grinding equipment with high efficiency
• Grinding can be carried out either wet or dry
• hollow cylindrical shell rotating about its axis and Length of the mill is
approximately equal to its diameter
• partially filled with balls made up of Steel, Stainless steel or rubber
• resistant materials such as Manganese, Steel or rubber
• Balls occupy about 30-50% of the volume and dia of the ball 12 mm-
125 mm
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4. Structure
• Ball mill is mainly composed of
• feed port
• discharge port
• grinding media
• grinding cylinder
• transmission department
• liner
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5. How does a Ball Mill Work?
• The material uniformly enters the first chamber of the ball mill by the
feeding device through the hollow shaft.
• The chamber has stepped lining or corrugated lining, which is filled with
steel balls of different specifications.
• Then the rotation of the grinding cylinder generates centrifugal force to
bring the grinding media to a certain height.
• After falling, they hit and grind the material.
• When the material is coarsely ground in the first warehouse, it enters the
second warehouse through a single-layer compartment board.
• The powder is discharged through the discharge raft to complete the
grinding operation
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7. Advantages
• The cost of installation is low
• The cost of Production is low
• It is suitable for materials of all degree of hardness
• The grinding Meduim is cheap
• Used for the grinding of explosive materials
• Suitable for both batch &continuous operations
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8. Disadvantages
• High machine noise level especially if the hollow cylinder is made of
metal, but much less if rubber is used.
• Relatively long milling time.
• It is difficult to clean the machine after use.
• Contamination of product may occur as a result of wear and tear
which occurs principally from the balls and partially from the casing
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9. Application
• The ball mill is used for grinding materials such
as coal,pigments,and fedspar for pottery.
• Grinding can be carried out in either wet or
dry but the former is carried out at low
speeds.
• The advantages of wet grinding are less power
consumption,increased capacity,no dust
formation etc…
• Dis advantages are high wear on the grinding
medium and neccesity to dry the product
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10. Manufacturers
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Container Products Corporation
Maag Automatik Inc

11. Questions
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