Dry Grinding - Important Steps to Follow :

Function as lubricant agent in between particles.
Modify the electrical charge of the surface of the particle.
Reduce the effects of moisture and minimize the caking problem.
Reduces the agglomeration problem during grinding.
The required additives addition for down stream operations can be added and number […]

Dry Grinding - Important Steps to Follow :
There are few steps one has to follow whenever the dry grinding route is opted in a attritor mill. By following the important steps we can make the grinding process more effective.

We need to maintain proper material to grinding media ratio. The ratio of material to […]

Advantages and Limitations of dry grinding in Attritor Mill :
ADVANTAGES :

Efficient and fast fine grinding
Very low energy consumption
Versatile process
Operator friendly
Very low maintenance
Compact design
Controlled grinding atmosphere

LIMITATIONS :

Getting sub micron size super fine powders is not easy
Generate more internal heat and needs special systems to discipiate
Feed material […]

Dry Milling Process : The dry grinding process can be performed with continuous grinding method also. Whenever the following manufacturing conditions are required continuous grinding is adopted.

Large production volume is involved.
Material is temperature sensitive.
Material has a tendency to cake.
When the process requires a stable condition […]

Dry Milling Process : The attritor dry grinding works in a condition described as Kinematic porosity. This is achieved by the expanded moving bed of grinding media. The dry particles are subjected to various forces like rotational, tumbling, impact and shear. All these forces helps to achieve micron size fine powders very easily and […]

Attritor Mill Principle of Working: The attritor is a grinding mill containing internally agitated media. The rotating shaft located centrally equipped with several horizontal arms creates sufficient stirring action so as to force the grinding media randomly through out the whole tank volume, causing irregular movement instead of group movement.
The irregular movement causes […]

Types of Grinding Media: There are many types of grinding media available. However for attritor mill the following grinding media generally used.

High alumina
Zircon
Zirconium
Ceramic
Glass
Flint
Agate
Carbon Steel
Stainless Steel
Chrome Steel
Tungsten Carbide
Silicon Carbide
Silicon […]

Selection Grinding Media:

Contamination: During grinding process the resulting material generated from the wear of the grinding media should not affect the final product. If it is so it can be removed by using in magnetic separator or chemical treatment or by a sindering process.
Availability: The availability is another important factor because some […]

Selection of Grinding Media: Since Grinding Media plays major role in grinding process, selecting suitable grinding media for particular application is very important. Selection of grinding media depends upon various factors and the important factors are listed below.

Specific gravity - The specific gravity of grinding media is very important for fitting to specific application. […]

In the attritor mill grinding process, the grinding media factor plays an important and major role and hence discussing about these factors is very essential. The smaller the grinding media used, the faster the grinding achievable. This is possible due to the factor that in a given volume, there are more media available and more […]