Retsch SR 200 - Manual (Page 18)

2/8/2012

Retsch GmbH
18
0002
Working Instructions
Target group: Laboratory personnel
General
The SR 200 is highly modern, high-performance product from
Retsch GmbH.
In view of the wide range of accessories available, the SR 200
rotor beater mill is a unit with many varied uses in the chemical
and pharmaceutical sectors, mineralogy and biology etc. in
industrial and research laboratories.
The SR 200 is used mainly for precrushing and fine crushing of
dry, soft to medium-hard materials with a hardness of up to
approximately 4 according to Mohs.
End fineness
the achievable end fineness depends on the hole width of the
sieve and the crushing properties of the material. In favourable
cases it is possible to achieve finenesses of < 60 µm.
The SR 200's mode of working
General sketch
Material is crushed in the SR 200 rotor beater mill by impact,
bouncing and shearing action.
After the material has been fed into the feed funnel, it passes
into the grinding chamber, where the crushing process takes
place between the rotor, the grinding insert and the sieve. see
also general sketch
As soon as the material has reached the relevant end fineness, it
passes the sieve and into the collecting pan.
The use of a cloth filter hose or a Conidur filter, available as an
accessory, which can be fixed between the SR 200 and the
collecting pan, prevents build-up of the air stream generated by
the rotating rotor and partly accelerates the material throughput.
This ensures a gentle crushing process.