FRITSCH PULVERISETTE 13 classic line - Manual (Page 25)

6.4 Adding material
DANGER!
Explosion hazard!
– When grinding oxidisable substances, e.g. metal or
coal, there is a risk of spontaneous combustion (dust
explosion) if the proportion of fine particles exceeds a
certain percentage. When grinding these kinds of sub-
stances, special safety measures must be taken and the
work must be supervised by a specialist.
– The device is not explosion-protected and is not suit-
able for grinding explosive materials.
CAUTION!
Switch the device on before filling material into the funnel.
Before switching on the device, make sure that the grinding
chamber is closed and that the grinding stock container is
not wedged in, but is inserted straight into the drawer.
n Only fill in so much material that the funnel's lid can still be closed.
n The maximum quantity fed in depends on the grindability of the
material and the sample volume of the grinding stock container.
n Observe the grinding process (grinding sound) and determine the
optimal filled in quantity. Repeat this for each new material.
n Do not refill more material until the grinding sound has lowered.
n Put large lumps of material (up to 20 mm per edge) into the funnel
singly; close the lid.
NOTICE!
The grinding disk holder and the housing are made of
spheroidal graphite cast iron. This steel cast is not stainless.
If you comminute sample material that is slightly moist,
then after the grinding, you need to dry off the back side of
the grinding disks, the inner side of the grinding disk holder
and all parts of the housing that comes into contact with
the samples. If you do not do this, then you can count of
corrosion.
Using the device
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