FRITSCH PULVERISETTE 16 cast iron - Manual (Page 7)

Page 6
PULVERISETTE 16
1.4 Brief description of the device
1.4.1 Fields of application
The cross beater mill serves primarily for preliminary and fine comminution of
medium-hard, brittle materials up to Mohs hardness of 6. Thanks to a large
selection of accessories, the cross beater mill is a device with wide-ranging
fields of application primarily in the areas of chemicals and ceramics, in min-
ing and metallurgy as well as in the preparation of soil samples, etc. in the
laboratory and in industry.
The achievable final fineness depends on the hole width of the bottom sieve
and the grinding properties of the material to be ground. Under good condi-
tions, fineness levels < 100 µm can be achieved.
Typical applications for soft materials:
Needles, leaves, grain, resins, cellulose, chemicals, dried fruits, peat, seeds,
dried plants
Typical applications for medium-hard materials:
Animal feed, salts, pellets, coal, porcelain clay, spices, gypsum, drugs, pot-
ash, tablets, slag, minerals, ash, stone and earth (bauxite, limestone, dried
clay, etc.), synthetic resins, pyrite, cement clinker, coke, ores, refractory ma-
terials.
1.4.2 Method of operation
The comminution in the cross beater mill takes place through impact-
ing, colliding and shearing effects. After introduction into the filling
funnel, the material enters the grinding chamber, where the com-
minution process occurs between the cross beater, grinding insert
and bottom sieve.
As soon as the material has reached the corresponding final fine-
ness, it passes through the bottom sieve into the collecting vessel.
A back draft of the air flow generated by the rotating cross beater is
prevented and an acceleration of the material throughput is partially
achieved with the use of a textile filter hose between
the cross beater
mill and the collecting vessel.
This ensures a gentle grinding process.