A grinding mill is a unit operation designed to break a solid material into smaller pieces. There are many different types of laboratory mills and grinding mills for lab and many types of materials processed in them. The grinding of solid matters occurs under exposure of mechanical forces that trench the structure by overcoming of the interior bonding forces. After the grinding the state of the solid is
changed: the grain size, the grain size disposition and the grain shape
Grinding is used to finish work pieces that must show high surface quality and high accuracy of shape and dimension.
For chemical and physical analytical methods it is essential that the specimen is perfectly homogenized to an adequate degree of analytical fineness.
MRC provides reliable range of grinders and mills for sample preparation, for coarse, fine and ultra fine size reduction of almost any dry material.
Milling also refers to the process of breaking down, separating, sizing, or classifying aggregate material. For instance rock crushing or grinding to produce uniform aggregate size for construction purposes, or separation of rock, soil or aggregate material for the purposes of structural fill or land reclamation activities. Aggregate milling processes are also used to remove or separate contamination or moisture from aggregate or soil and to produce "dry fills" prior to transport or structural filling.
Grinding may serve the following purposes in engineering:
- Increase of the surface area of a solid
- Manufacturing of a solid with a desired grain size
- Pulping of resources
A typical type of fine grinder is the ball mill. A slightly inclined or horizontal rotating cylinder is partially filled with balls, usually stone or metal, which grinds material to the necessary fineness by friction and impact with the tumbling balls. Ball mills normally operate with an approximate ball charge of 30%. Ball mills are characterized by their smaller (comparatively) diameter and longer length, and often have a length 1.5 to 2.5 times the diameter. The feed is at one end of the cylinder and the discharge is at the other.
Small versions of ball mills can be found in laboratories where they are used for grinding sample material for quality assurance.
Operation of a ball mill:
sample mill,knife mill,cutting mill,disk mill,ball mill:The types of MILLS we provide