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allmineral
gaustec ® – the new Wet High
Intensity Magnetic Separator
Eng. José Pancrácio Ribeiro | Dipl.-Ing. Andreas Horn
Paper presented at
Conference on MARKETING OF INDIAN IRON ORE in Goa, India | 23-24 August 2007
Success with the fluidized bed | 1

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The gaustec ® WHIMS
Introduction
allmineral world leader in jigging technology has signed
a Cooperation Agreement with Gaustec Magnetismo
Ltda. | Brazil in 2006, to market the gaustec ®
Magnetic Separator WHIMS type (Wet High Intensity
Magnetic Separator) on a worldwide basis.
This equipment has been designed and improved by
skilled engineers based on their practical experience
of more than 20 years. Several features introduced
to the standard equipment led to the best possible
operational flexibility and easy maintenance.
Leading Technology in Magnetic Separation
A wide range of sizes starting from the smallest unit
for research and process design applications (G340 –
Minimag), with a rated feed capacity of 0.3 t/h, to the
biggest equipment of its kind ever constructed, the
G 3600 with a rated feed capacity of 200 t/h is offered.
2 | The gaustec ® WHIMS

allmineral
gaustec ® | Technology
Wet High Intensity Magnetic Separator
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Separates ores and other paramagnetic
and feebly magnetic minerals with a particle
size up to 3 mm.
Matrix is made of grooved plates.
Vertical and unhindered flow through the
matrix
The high gradient magnetic field is independently
adjustable for each rotor
Rougher and cleaner|scavenger process
step possible in one single machine.
Rotor speed is adjustable from 3 to 7 rpm.
Throughput rates of 0,3-200 t|h per machine
gaustec ® Technology | 3

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gaustec ®
gaustec ® 3600 | 200 tph feed capacity
The biggest WHIMS in the world.
4 | gaustec ® 3600

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Innovations | The key factor to keep the pace with the growing mining industries demands
Main features introduced to the gaustec ® WHIMS that improve their performance beyond the known limits
of Magnetic Separator Technology:
1. Magnetic Induction of each Rotor Independently
adjustable.
2. The standard equipment is supplied with
two AC/DC power supplies, one for each rotor.
The high gradient magnetic field is independently
adjustable for each rotor through AC/DC converters,
in the operational ranges. This allows for
rougher and cleaner| scavenger process steps in
one single machine.
The coils that generate the magnetic field on the
top and bottom rotor are fed electrically independent,
making it possible to have the necessary
magnetic induction on each rotor adjusted according
to the operational needs.
This feature is also of advantage from the maintenance
point of view, since if one of the AC/DC
power supplies fails the second power supply can
supply energy to all coils of the machine maintaining
the production in emergency status, until
the necessary repair can be made.
Innovations | 5

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gaustec ® | Room between poles
3. Larger distance between magnetic poles
One of the main restriction to make the maintenance
in traditional WHIMS is the small distance
between the rotors. This makes the maintenance
of the bottom rotor like matrix inspection, cleaning,
and retightening of the bolts, a tiresome
and difficult task to perform.
The gaustec ® Whims presents as one of its main
features a comfortable room between rotors,
making operation and maintenance of this equipment
easy.
6 | Room between poles

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gaustec ® | Adjustable Magnetic pole
4. Adjustment of the effective magnetic area of the
magnetic poles
Adjustable Pole
Electrical energy saving is a must in the gaustec ®
WHIMS design. The increasing demand to reach
higher magnetic induction is an important factor
as well.
Looking for the wide application range the gaustec
® WHIMS is developed for, a new design of the
magnetic poles has been introduced to achieve
both: energy savings and higher magnetic inductions.
This possibility is offered to our customers by
making the magnetic pole area adjustable.
Adjustable Magnetic pole
Adjustable Magnetic pole | 7

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gaustec ® | Adjustable Magnetic pole
The pole size can be adjusted by simply adding
respectiveley removing the yellow marked pole wedges.
With a smaller pole one saves energy or can
increase the magnetic field strength. With a wider
pole the residence time can be increased leading to a
higher separation efficiency.
Adjustable Magnetic pole | Principle
8 | Adjustable Magnetic pole

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gaustec ® | Technology
5. Two process steps in one single machine
Due to the independently adjustable magnetic
fields for the two rotors a cleaner-scavenger process
can be realised in a single machine. This
offers unsurpassed flexibilty with regard to product
quality and recovery.
gaustec ® Technology | 9

allmineral
78
74
Performance Data
71
69
66
Concentrate
66,79 66,66 67,05 66,40 66,98 67,00 66,94 66,74 66,76 66,81 66,87 66,83 66,56 66,65 66,53 66,72 66,79
63
60
57
Fe
Feed
57,51 57,31 58,12 57,32 55,67 56,23 56,08 58,38 56,76 58,06 55,50 55,40 54,14
56,62 58,15 57,71
54,28
54
51
48
45
42
39
33
30
27
gaustec ® WHIMS
The performance data of an Gaustec
3200 in operation in a Brazilian
mine (03|2006 - 07|2007) show not
only a significant increase in pro-
24
21
18
15
12
9
3
0
Feed
Concentrate
19,01 18,15 16,23
15,54
15,48
16,74 18,18 19,40 21,15
21,50
16,66 17,50 19,35
15,36
17,08
15,45 15,96
3,15 3,23 2,75 2,97 2,73 2,66 2,71 2,88 2,87 2,84 2,75 2,64 3,15 3,07 3,27 3,02 2,63
SiO 2
Fe ( Feed) SiO 2 (Feed) Fe (Conc) SiO 2 ( Conc)
duct quality. The variations in the
feed grade are eliminated and a
very constant product quality is
11 | 2005
12 | 2005
01 | 2006
02 | 2006
03 | 2006
04 | 2006
05 | 2006
06 | 2006
07 | 2006
08 | 2006
09 | 2006
10 | 2006
11 | 2006
12 | 2006
01 | 2007
02 | 2007
03 | 2007
04 | 2007
05 | 2007
06 | 2007
07 | 2007
produced.
10 | Performance Data

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gaustec ® | The Minimag
6. Lab Scale Process Design with »MINIMAG«
For the process development for new ore types,
allmineral offers the laboratory WHIMS G340
»MINIMAG«. With a wide range of magnetic
induction reaching fields of up to 17.000 Gauss
(1.7 Tesla), this equipment works with the real
dynamic conditions of an industrial unit enabling
the process engineer to safely develop his project.
Four types of magnetic matrix, with its scale factor
to larger equipments, are offered as standard
design. Other type of matrix can be offered upon
request.
The Minimag
The Minimag | 11

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gaustec ® | The Minimag Matrix identical to Industrial Matrix
The matrix for the Minimag has the same height as
the matrix boxes of the industrial units. This ensures
an identical residence time in the process which is
very important for upscaling.
Minimag Matrix | Industrial Matrix
12 | The Minimag Matrix

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gaustec ® | Minimag Rotor
The Minimag-Rotor
The Minimag-Rotor | 13

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Aufbereitungstechnik GmbH & Co. KG
Baumstraße 45
47198 Duisburg|Germany
Telefon +49(0)2066.9917-0
Telefax +49 (0) 20 66 . 99 17 - 17
e-mail head@allmineral.com
www.allmineral.com
allmineral Llc.
Suite 1-F, 1360 Union Hill Road
Alpharetta, Georgia 30004|USA
Telefon +1 . 7 70 . 4 10 02 20
Telefax +1.770.4100807
e-mail allmineral@aol.com
www.allmineral.com
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Ul. Powstańców Śl. 5
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Telefon +48 (0) 71 . 7 83 70 11
Telefax +48 (0) 71 . 7 80 44 18
e-mail biuropl@allmineral.com
www.allmineral.com
allmineral (Pty.) Ltd.
P.O. Box 73171
Fairland 20 30, Johannesburg|South Africa
Telefon +27 (0) 11 . 4 78 53 80|81
Telefax +27 (0) 11 . 4 78 53 88
e-mail allmin@global.co.za
www.allmineral.com
Our partner in Brazil
Gaustec Magnetismo
Rua Kerban, 35
Jardim Canadá - Nova Lima - MG
Telefon +55 31 35 41 . 19 90
e-mail pancracio@gaustec.com.br
www.gaustec.com.br