Working Instructions; Sieving Aids; Quantities Of Material To Be Sieved - Retsch AS200 Operating Instructions Manual

Overview table

Sieving aids

Cubes of Vulkollan
Brushes
Plastic rings
Small brushes
Highly dispersed silica
(Aerosil)
- - Aluminium oxide
- - Talcum
Drying
Pass dry warm air through the
set of sieves
TAP function
08.01.2008 Retsch GmbH

Working Instructions

Sieving aids
For materials which are difficult to separate we recommend the ad-
ditional use of sieving aids in the individual sieve fractions. For this
purpose
Vulkollan cubes can be used, depending on the mesh size of the
sieve and the preselected oscillation intensity. See also the table
below.
Make sure that the sieve fabric is not excessively expanded
through overloading with sieving aids since this will impair the
precision of your analytical sieves.
For recommended quantities of sieving material see the section

„Quantities of material to be sieved"

Quantity per Supplier
sieve or sieved
material
5, 12x12 RETSCH, Haan
3 RETSCH, Haan
3, various dia.
0.5 to 2% Degussa, Ffm
0.5 to 1% Degussa, Ffm
Quantities of material to be sieved
A set of sieves required for sieve analysis is made up of a number
of analytical sieves arranged one on top of the other with increas-
ing mesh size.
In order to guarantee quick fractioning with an exact result the
quantity of material to be sieved must be adapted to the sieve di-
ameter and the nominal diameter of the openings.
Guide values for this are given in the respective standard specifi-
cations for sieve analysis, e.g. according to DIN 22019/1 the fol-
lowing maximum added quantities are recommended:
Nominal diameter of
sieve openings
19
balls of agate, rubber, porcelain or nylon brushes and
Field of application
With use of plane siev-
ing machines
With hand sieving
With fine, sticky,greasy
sieved materials and
materials which are
electrostatically charged
With crude rubber and
rubber powder
With very wet / very
damp sieved material
With hygroscopic sieved
materials
With fine, easily sticking
sieved materials which
fall through the meshes
only with difficulty
Material quantities in dm 3 for
8
3 . 1 5
1
0 . 5
0 . 2
0 . 0 6 3
0 . 0 2 0
Caution!!
Before adding check usability and
compatiblity
A TAP function is built into the Tap
Sieving Machine AS 200 tap, which
can be switched off as required.
200mm diameter
0 . 5 0 0
0 . 3 0 0
0 . 1 4 0
0 . 1 0 0
0 . 0 6 0
0 . 0 3 5
0 . 0 2 0
Doc.Nr. D 98.025.9999