Everything You Need to Know About YYDLS Magnetic Separators

YUEYANG DALISHEN
ELECTROMAGNETIC MACHINERY
CO., LTD.

YYDLS
About Us
Magnetic Separators
- Vertical Ring High Gradient Electric Magnetic Separator DLS
- Trommel Screen DL Series
- Pair-pole High Intensity Magnetic Separator DLSD
- Dry Rare Earth Drum Magnetic Separator CXJ
- Dry Rare Earth Roll Magnetic Separator CR
- Wet Rare Earth Drum Magnetic Separator CT
Content

YYDLS
•Yueyang Dalishen Electromagnetic Magnetic
Co., Ltd., a leading electromagnetic equipment
manufacturer in Asia-Pacific region, is a S&T
contemporary enterprise integrated with
science, industry and trade. It is a main
member of Lifting Electromagnet Professional
Association of China, a high-tech company
participating into the China Torch Plan Project
and the master workstation of Hunan
University.
•Yueyang Dalishen, established in 1998, now
owns fixed assets of RMB 40,000,000,
registered capital RMB 10,280,000 and 308
employees, among which 60 are engineers and
16 are senior engineers.
office
workshop
About Us

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Organization Chart
General
Manager
Vice G.M.
for
Production
Process & Material Department
Quality Control Department
Produce Admin Department YYDLS Workshops
Financial Department
H.R. Administration Department
Company Administration Office
Vice G.M.
for
Marketing
After-sale Service Department
Marketing Department
Magnetic Separator Dept
Foreign Trade Department
Domestic Trade Department
Sales Administration Office
Vice G.M.
for
Technology
Furnish Department
Technology Department

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Dalishen is focused on design and producing electro or permanent magnetic
machineries and their auxiliary equipments with the brand "Cishen". We manufacture 10
series of 200 products, including high gradient magnetic separator, electric magnetic or
rare earth magnetic separator for tramp iron removal, trommel screen, lifting
electromagnet, cable reeling drum, rectification control panel, permanent magnetic
lifter, blackout magnetic-sustaining equipment, metal detector, etc. There are products
in different configuration with international technology for your special needs.
Our markets cover
metallurgy, machinery,
electricity,
transportation, mining,
chemistry, cement,
construction and other
industries in Europe,
America, Oceania,
Southeast Asia, Middle
East etc.
Products and Markets

Hit Products ►Magnetic Separator

YYDLS
Double Vertical Rings High Gradient
Magnetic Separator DLS is a mineral
beneficiation machine, which is
developed independently by YYDLS . It
is high intensity separator with patent
No. ZL200820119589.7. Currently, it is
the best high intensity separator with
excellent performance and
technology. The machine is featured
by technologies of rotary vertical rings
and backwash of concentrate, and is
equipped with high frequency
vibration mechanism that helps solve
matrix block. It has advantages of high
enrichment ratio and flexibility to
various particle size, pulp density and
grade of original ores. The machine
serve with high recovery rate and high
grade of concentrate for purifying
weak magnetic minerals and remove
Fe from non-metallic minerals.
Double Vertical Ring High Gradient Magnetic Separator DLS

Ferrous Metal
Recovering martite, hematite, limonite, siderite, chromites, ilmenite,
manganese. etc.
Non-ferrous
Metal
Recovering fine tungsten disseminated in tungstenic quartz reef;
recovering pyrrhotite from cassiterite polymetallic sulphide; separating
wolframite and cassiterite, limonite, wolframite and scheelite, garnet,
etc.
Non-metal
Purifying quartz, feldspar, kaolin and other raw materials for glass and
ceramics industry; removing iron from hot refractory minerals such as
sillimanite, andalusite and kyanite and removing detrimental impurities
from hormblende, mica, tourmaline, garnet, etc.
Other Minerals
Recovering tantalum and niobite, zinnwaldite and monazite; recovery
tailing of weak magnetic minerals; treating waste water of steel plant
and power plant; and clearing chemical plant polluted by catalyst.
Applicable Minerals

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To make sure our
machine is
suitable for
separation of your
minerals, we offer
specimen test for
free.
We offer
customized
products as per
your specific
needs
Free guide for
erection and
commissioning
and train
operators for you.
Free Sample
Test
Erection &
Commissioning
Tailored Products
Note for Order

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Structure and working principle
Features and Benefits
Structure Scheme, Calculation and Demonstration of High
Gradient
Users List
Application On Site
DLS HGMS Series

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1. Rack
2. Ring driving
mechanism
3. Concentrate flusher
4. Liquid level tank
Structure Schematic
Drawing of DLS

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5. Rotary ring
6. Concentrate bucket
7. Rinse bucket
8. Feeding bucket
9. Magnet yoke
10. Excitation coil
11. Vibrating mechanism
12. Vibrating motor
13.Vibrating support
14. Tailing bucket
15. Small tailing bucket
16. Middling bucket

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3D Schematic
Drawing of DLS

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Working Principle of DLS
The rotary rings are equipped with
matrixes of magnetic rods orspecial
magnetic medium. When beneficiation
started, the ring rotates clockwise, pulp is
fed into feeding bucket and flows into
the matrix through the gaps of upper
yoke. The magnetic medium are
magnetized in the background magnetic
field, forming a high gradient magnetic
field and attracting magnetic particles on
the surface of magnetic medium. With the
rotation of rings, the magnetic particles
are transported to the non-magnetic
upper apex and flushed into the
concentrate bucket by the flushing water.
Non-magnetic particles are transported
into the tailing bucket though the gaps of
lower yoke.

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The structure of magnetic system is like the
shape of stud, as seen here
A steel backing plate is necessary for the
rotary of the rings, therefore, the magnetic
system is adjusted as seen here
If the rings with magnetic mediums rotate
in the magnetic pole, the rotary structure is
as seen here
The so-called Double Vertical Ring means there are two rings on each machine.
This special design is the magnetic structure of the machine. The backing plate
between the rings is for driving and supporting.
Features of DLS
Magnetic
System of
Rings

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The magnetic particles in the pulp are
acted upon by forces such as gravity,
fluid drag, fluid wallop, etc., some of
them will be separated from the
matrixes when flow into the ring. To
minimize the effect of the fluid wallop,
the liquid level will be raised to
immerse the bottom matrixes. In this
way, the wallop on the attracted
magnetic particles will be lowered.
Particles will subside in the liquid. To
make more opportunities for particles
to meet the matrixes, the subsided
particles should be ascended and the
pulp should be waved. A vibrating
mechanism is designed. The
mechanism is made up of rubber seal
cup and reciprocate-in-line device. The
seal cup will change the volume of the
liquid in the machine, thus to vibrating
the liquid.
Vibrator and it's Function
Function of Pulsation
1.Lower the wallop acted on the
magnetic particles attracted by matrixes.
2.Separate the particles in the pulp
3.Make more particles touch with
matrixes
4.Remove the half inter-growth particles
from matrixes, to raise the grade of
concentrate.
vibration mechanism

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The high gradient of magnetic field is produced
artificially. The magnetic medium generates a
magnetic inductive field in the background field to
change the uniform magnetic field to a non-
uniform one, increase the magnetic change rate
(gradient) and increase the attraction force on
magnetic particles. As a result, the beneficiation of
the magnetic separator is more effective to dress
lower intensity magnetic particles, such as hematite,
limonite, manganese, etc.
Magnetic induction line always cuts across. As seen
in Figure 3, the induction line starts from N pole to
S pole through matrixes. The magnetic intensity B2
of magnetic medium in the matrixes is far more
higher than background intensity B1. Here forms a
aberration magnetic field. The intensity on the
surface of magnetic medium is very high, but the
intensity close to them is dramatically lowered,
hence the magnetic change rate (gradient)is very
high.
Producing High Gradient

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Jagged Steel Rod
As above mentioned, the induction line cuts
across, namely the way with the least
resistance. Since the resistance of air is much
more higher than that of magnetic medium,
more induction lines pass through the
magnetic medium before entering into the
air .
The point effect theory means more
induction lines pass through the point of
magnetic medium. The more induction lines
are, the higher magnetic intensity is. Thus the
intensity on the point of magnetic medium is
the highest.
According to this theory, we process the
magnetic medium with edges and corners,
which attract more magnetic particle of the
same size than magnetic medium with
smooth surface and beneficiate more fine
particles.
In this way, the recovery of magnetic medium
with edges and corners are much more higher
than the smooth-surface ones.
Feature: Point Effect

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High
Background
Intensity
High
Magnetic
Gradient
Liquid
Automatic
Control
The magnetic materials is electrical pure iron DT4C (Fe:
99.5%)made by Taiyuan Iron & Steel (Group) Co., Ltd.,
raised the background intensity to 12000GS, much higher
than Q235 steel (10000 GS).
99.5%)made by Taiyuan Iron & Steel (Group) Co., Ltd., raised the
background intensity to 12000GS, much higher than Q235 steel
(10000 GS).
The beneficiation is more stable and efficient. Like products in
China are manual control for liquid level adjustment, which
requires high stability of pulp feed-in that is uncertainty in some
degree.
Optimal design of magnetic medium in the matrix to improve the
inductive magnetic intensity and magnetic gradient, thereby, to
attract more magnetic particles and more small-sized particles. The
magnetic rod (Patent No.: ZL200920306697.X) is high saturation and
high permeability soft magnetic materials treated by ionitriding.
These rods are with higher abrasive resistance, making higher
gradient, stronger attraction force and higher recovery.
Benefits of DLS HGMS

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The magnetic materials with low resistance, high
permeability and optimal designed matrix make the high
gradient and excellent performance available in lower
background intensity and lower excitation power.
The matrix can be de-gaussing in a short time, and the
remanence is low, concentrates are easily unloaded with
less water.
Energy-saving
Water-saving

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Safe and Stable
Long Service Life
The excitation coils are fastened with epoxy resin
adhesive to avoid vibration after electrified, thus
protecting the insulation of coils, prevent short circuit
and prolonging the service life.
Electronic components, driving medium, such as bearings,
reducer, belt and motor are high-quality products in and
abroad, and rubber tube valve ensure the security and
high performance of our magnetic separator.
The driving part is joined by expansion sleeve instead of flat
key, improving the stability.
The excitation coils are fastened with epoxy resin
adhesive to avoid vibration after electrified, thus
protecting the insulation of coils, prevent short circuit
and prolonging the service life.
Electronic components, driving medium, such as bearings,
reducer, belt and motor are high-quality products in and
abroad, and rubber tube valve ensure the security and
high performance of our magnetic separator.

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The speed of rotary ring and the frequency of high-
frequency vibration box (stroke box) are infinitely
variable controlled, making the best process parameter.
Remote control is available.
Automatic control of liquid level without human operation,
improving the stability of beneficiation.
Convenient
Operation

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Calculation Results and Introduction of
Magnetic Intensity of HGMS Structure Scheme,
Test
Organization
Super Conducting Magnet Center, Institute of High
Energy Physics of Chinese Academy of Sciences
Company
Yueyang Dalishen Electromagnetic Machinery Co., Ltd.
Method
ANSYS Finite Element Method software,
3D model of magnetic materials
2D model of matrix
Material
materials of yoke, iron core and magnetic pole are DT4
electronic pure iron

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ANSYS Finite Element Model
Since the magnetic
materials are symmetrical,
1/4 syntactic model is
enough for calculation.
The syntactic model is as
seen Figure 1, the crimson
part is magnet yoke, light
blue part is iron core, the
pink part is the inside
circle magnetic pole and
the middle part is the gap
for matrixes.
Fig.1 3D Model

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Fig.2 3D model finite element meshing & coil model
ANSYS Finite Element Model

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Value: A=250mm ； width of coil: 400mm;
thickness of coil: 300mm; distance from central
magnetic body to inside of yoke: 1200mm; turns of
one coil: 3.125x105
AN.
Scheme (DLS-200)Ⅰ
Result 1
Magnetic field distribution of the central section of circle magnetic body
Fig.1-1
Magnetic fields
clouds map of
the section

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Fig. 1-2 magnetic field
contour maps of the central
section
Intensity of the central magnetic field is measured as about 1.3T
through collecting the intensity of nodal points on the central section.
Scheme 1 (DLS-200)

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Result of SchemeⅠ
Magnetic fields distribution of yoke, iron core and magnetic pole
Fig. 1-3
magnetic field
clouds map

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As seen from the figures, the magnetic intensity of the iron core and magnetic pole
is very close to the magnetic saturation of magnetic materials, especially the core.
To maintain the intensity of central magnetic field, increase the sectional area of
iron core and decease the area of coil.
Fig.1-4 vector distribution of magnetic fieldResult of SchemeⅠ

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Value ： A=350mm; width of coil: 500mm; thickness of
coil: 400mm; distance between central magnetic body
and inside of yoke: 1600mm; Turns of one coil ：
5.388x105
AN ；
Scheme (DLS-250)Ⅱ
Result
Magnetic field distribution of the central section of circle magnetic body
Fig2-1 Magnetic
fields clouds map
of section

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Fig. 2-2 magnetic field
contour maps of the central
section
The intensity of the central magnetic field is measured as about 1.3T
through collecting the intensity of nodal points on the central section.
Scheme (DLS-250)Ⅱ

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Result of Scheme Ⅱ
Fig. 2-3
magnetic field
clouds map
Magnetic fields distribution of yoke, iron core and magnetic pole

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As seen from the figures, the magnetic intensity of the iron core and magnetic pole
is very close to the magnetic saturation of magnetic materials, especially the core.
To maintain the intensity of central magnetic field, increase the sectional area of
iron core and decease the area of coil.
Fig.2-4 vector
distribution of
magnetic field
Result of Scheme Ⅱ

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Since the jagged magnetic rod is very different with magnetic body, for the sake of convenient
modeling, we build a 2D model of magnetic rods in 1.2 T magnetic field. The magnetic vector
is in the direction of Y axis and is perpendicular to magnetic rod. The calculated result of 4x4
magnetic rods in the central magnetic field is as following:
Fig.3.1 clouds map
of magnetic field
with jagged rods
1. The distribution of magnetic field with jagged rods and the distribution of
magnetic intensity and gradient.
Intensity of Jagged Rods in Matrix

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Fig. 3.2 magnetic
vector map of
magnetic field with
jagged rod
1) The distribution of magnetic field with jagged rods and the distribution of
magnetic intensity and gradient.

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The magnetic field intensity of jagged rod is obviously higher than that
of the basic background magnetic field, and the gradient is much higher
which varies periodically according to the distribution of jagged rod.
Curves of the magnetic inductive intensity and its gradient
Fig.3.3 distribution
curve B parallel to
Y axis x=0.008m

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Fig.3.4 distribution curve dB/dy parallel to Y axis, x=0.008m

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Fig.3.5 distribution curve B parallel to Y axis, x=0.006m

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Fig. 3.7 magnetic field
distribution of jagged rod

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Fig 3.8 magnetic
line of matrix
with jagged rods

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Magnetic
intensity of
smooth rods is
smaller than
jagged rods,
the magnetic
gradient in
peripheral
direction is
almost equal
to jagged rods
and varies
periodically
according to
the
distribution of
rods.
Intensity of Smooth Rod Inside Matrix
2. The distribution of magnetic field with smooth rods and the
distribution of magnetic intensity and gradient.
Fig. 3.9 clouds map of magnetic field with smooth rods

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Fig.3.10 magnetic vector of magnetic field with smooth rod
2. The distribution of magnetic field with smooth rods and the
distribution of magnetic intensity and gradient.

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Relative curves of magnetic inductive intensity and its gradient
Fig.3.12 distribution curve dB/dy parallel to Y axis when
x=0.008m

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Fig.3.12 distribution curve dB/dy parallel to Y axis when x=0.008m
Relative curves of magnetic inductive intensity and its gradient

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Note: the
value of B in
some interval
seems like
liner or
straight line
(constant).
This is
because the
interval is very
short (1 or 2
mm). In fact,
the value is
not constant.
Distribution curves of magnetic field with smooth rods and the
distribution of magnetic intensity and gradient of magnetic
Fig.3.13 distribution curve B parallel to Y axis when x=0.006m

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Distribution curves of magnetic field with smooth rods and the
distribution of magnetic intensity and gradient of magnetic

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Fig.3.16 Magnetic line of magnetic field with smooth rods

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The following is the distribution curve of B and dB/dy on the
straight line of 1.8 mm next to X axis and parallel to Y axis
Fig.3.17 distribution curve of B parallel to Y axis, x=0.008m

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The following is the distribution curve of B and dB/dy on the
straight line of 1.8 mm next to X axis and parallel to Y axis
Fig.3.18 distribution curve of dB/dy parallel to Y axis, x=0.008m

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Structure Scheme and Calculation
1. The magnetic system structure of DLS-200 and DLS-250 is
science. Theoretical calculation of magnetic intensity of central
air gaps of magnetic poles is 1.3T (13000GS), reached the
expected value of 1.2T (12000GS)
Conclusion
2. It is obvious that the magnetic intensity of magnetic field with
jagged rods is higher than that with smooth rods. The intensity on
jagged rods is up to 3.148T (31480GS), while the intensity of
smooth rods is up to 2.573T (25730GS). With jagged rods, the
magnetic gradient is several times higher, and the db/dy varies
dramatically. With smooth rods, the gradient is slightly increased
and the gradient db/dy varies gently.
3. According to Fm=μ×ν×B×(dB/dy), the format forces acting
upon the particles in magnetic field, and the calculated result
above mentioned, the magnetic force on particles in magnetic
field with jagged rods is much higher than that in magnetic field
with smooth rods.

YYDLS
2010 User List
No. Company Model Q.t.y materials
1
Shandong Binzhou Weiqiao Aluminium
Industrial Technology Co., Ltd.
DLS-200 9 Red mud
2 Shandong Xinfa Renewable Energy Co., Ltd. DLS-200 3 Red mud
3 Jinan Steel (Group) Co. DLS-200 3 Hematite
4 Liaoning Huludao Bajiazi Mining Co., Ltd. DLS-200 3 MnCO3
5 Shanxi Heigou Iron Mining Co., Ltd. DLS-200 2 Hematite and Limonite
6 Henan Songshan Heavy Industries Co.,Ltd. DLS-200 6 Hematite and magnetite
7 Henan Songshan Heavy Industries Co.,Ltd. DLS-250 2 Hematite and magnetite
8 Dandong New Silk Road Trading Co., Ltd. DLS-200 4 Limonite
9 Dandong New Silk Road Trading Co., Ltd. DLS-250 1 Limonite
10
Liaocheng Jiachang Renewable Resources
Co., Ltd.
DLS-200 4 Hematite

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11 Kunming Xichen Mining Co., Ltd. DLS-200 8 Hematite and magnetite
12 Shandong Lijing Mining Company DLS-200 2 Silica Sand
13 Gansu Zixin Mining Co., Ltd. DLS-200 2 Andalusite
14 Pingjiang Feldspar Mineral Company DLS-200 2 Feldspar
15 Shandong Lijing Silica Sand (Group) Co., Ltd. DLS-200 2 Silicon Sand
16 Indian Kejem Pvt DLS-200 4 Hematite
17 Mr. Li Weixin in Guangdong DLS-200 2 Feldspar
18 Hainan Mining Co., Ltd. DLS-200 1 Hematite
19 Hainan Mining Co., Ltd. DLS-250 4 Hematite
20 Shandong Nanshan Aluminum Co., Ltd. DLS-200 2 Red mud
21 China Aluminum Corp.Pingguo Branch DLS-200 4 Red mud
22 China Aluminum Corp. Zhongzhou Branch DLS-200 1 Red mud
2010 User List

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Trommel screen is
used for dreg
insulation to assist
DLS magnetic
separator and for
other necessary
working.
Advantages: low
speed, high
abrasive
resistance, less
trouble and easy
for operation and
maintenance.
DL Trommel Screen

YYDLS
DLSD series magnetic separator
(Patent No.:
ZL200920065387.3) is for super
high grade of non-metal
beneficiation, it is specially
designed by YYDLS, introduced
with the latest international
technologies on magnetic
separators. It is now the best
high intensity electromagnetic
separator in China with
advantages of high flexibility to
various concentrations of pulp,
particles sizes and mineral
grades. Being easy and safe for
operation and maintenance, it
is the ideal equipment for iron
removal of non-metallic
minerals.
Pair-pole High Intensity Magnetic Separator DLSD Series

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* For refining (iron and titanium removal) nonmetallic
minerals, such as quartz, feldspar, nepheline, fluorite,
sillimanite, spodumene, kaolin, etc.
* For refining low-intensity magnetic separation.

DLSD Magnetic Separator Structure

Working Principle
The magnetic field of this
machine is produced by
electrified copper coils. The
magnetic lines pass through the
matrix, making high gradient.
When mineral pulp with
magnetic particles traverses the
matrix from the bottom of the
machine, magnetic particles are
attracted by the high magnetic
field on the surface of magnetic
medium. All valves and
electronic components are
controlled by PLC software, and
the magnetic particles will be
removed automatically.

YYDLS
Dry Drum Type Permanent
Magnetic Separator CXJ
series are for beneficiation
of high intensity magnetic
minerals, such as
magnetite, titanic
magnetite, franklinite,
pyrrhotite, oxymagnetite,
and for removal of iron in
metallurgy, coal industry,
mining, insulation material,
cement industry, chemistry,
building material and food
industry, etc. with large
processing capacity.
Dry Drum Type Permanent Magnetic Separator CXJ

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It is suitable for
dressing and refining
strong magnetic
particles(≤10mm) and
recovery of heavy
magnetic medium, and
removing iron.
Features: high intensity,
strong attraction force
and high separating
efficiency, free of
maintenance, energy
saving, safe and
reliable.
Dry Drum Type Permanent Magnetic Separator CXJ

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Functions:
1. discarding tailings and
purifying coarse particles
of feebly magnetic
minerals, such as
hematite, limonite,
manganese, etc.
2. processing of non-
metallic minerals, such as
silica, sillimanite, rutile,
kyanite, garnet, quartz,
frigidite, feldspar, zircon,
adamantite, diamond, etc.
3. removing magnetic
impurities from abrasives,
catalysis and other
powders.
Dry Roll Type Permanent Magnetic Separator CR Series

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Wet Rare Earth Drum Magnetic Separator CT
The CT series MS are for removing strong magnetic substances, such as magnetite,
Ti magnetite, franklinite, pyrrhotite, maghemite, etc. from week magnetic metals and
non magnetic materials by wet concentration.
Three types:
1. Half counter-flow tank (CTB) 2. Direct flow type (CTS) 3. Counter flow type
(CTN)

YYDLS
Thank you!
www.yydls.com
Tel:+86-730-7600700
Email: sp@yydls.com

Everything You Need to Know About YYDLS Magnetic Separators

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