lnpe LNIST-45Al User manual

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LNIST-45A Pulverization & Classification System

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Contents
1. Summary of LNIST-45A Pulverization & Classification System ..............................3
1.1 System Introduction............................................................................................3
1.2 System Constitution............................................................................................3
1.3 Main Power Configuration...............................................................................5
1.4 Main Specifications and Characters.................................................................5
2. Main technical parameters and technological process................................................6
2.1 Main Technical Parameters.................................................................................6
2.2 Technological Process.........................................................................................6
3. Installation and Commissioning &SOP......................................................................7
3.1Installation and Commissioning...........................................................................7
3.2 Standard Operating Procedure ............................................................................8
4. Influences on Pulverization & Classification Efficiency..........................................11
4.1 Material Property ..............................................................................................11
4.2 Moisture Content...............................................................................................11
4.3 Loading Weight.................................................................................................11
4.4 Input Particle Size.............................................................................................12
4.5 Input Particle Size Distribution.........................................................................12
4.6 Raw Material Compositions..............................................................................12
5. Equipment Maintenance & Repair............................................................................13
5.1 Maintenance & Repair ......................................................................................13
5.2 How to Replace Classifier Bearings .................................................................14

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6. Familiar Malfunction & Exclusion Methods............................................................16
Enclosure 1 Control Cabinet Operation Instructions....................................................18
1．Overview...........................................................................................................18
2．Constitution.......................................................................................................18
3．Normal Working and Installation Conditions...................................................18
4．Acceptance, Installation, Commissioning.........................................................18
5．Control Principle...............................................................................................19
6．Attention Items：..............................................................................................19
Enclosure 2 Bearing Instructions..................................................................................20
Enclosure 3 User Manual of Blower.............................................................................21
1. Installation...........................................................................................................21
2. Running...............................................................................................................21
3. Familiar Malfunction & Exclusion Methods......................................................21
4. Operation and Maintenance................................................................................22
Enclosure 4 User Manual of High Efficiency Dust Collector ......................................23
1. Installation...........................................................................................................23
2. Operating Maintenance.......................................................................................23
Enclosure 5 System Flowchart......................................................................................26

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Operation specification of LNIST-45A
Pulverization & Classification System
1. Summary of LNIST-45A Pulverization & Classification System
1.1 System Introduction
LNIST-45A pulverization & classification system is an ultrafine powder
production line integrating pulverization, classification and collection. It is also
suitable for the production of ultra-fine powder and spherification of battery cathode
materials such as artificial graphite, natural graphite, petroleum coke, etc. which has
the features of low energy consumption and high yield.
1.2 System Constitution
LNIST-45A pulverization & classification system consists of feeding system,
impact mill, turbine air classifier, cyclone collector, high-efficiency cartridge filter,
blower, discharge system, temperature control system, safe filter and electrical control
system with touchscreen etc.
a. Feeding System
The feeding system consists of raw material bin and screw feeder which realize
continuous feeding of the system. The feeding amount is controlled by adjusting the
motor frequency of the screw feeder.
b. Impact Mill
The impact mill is mainly composed of grinding wheel, hammer head, grinding
track and barrel body. When working, the material between hammer head and grinding
track received strong impact, friction and shear, so as to be crushed.
c. Turbine Air Classifier
The classifier is made up of motor, classification wheel, classification tank.
Which works through adjusting both revolving speed of classification wheel and resize
secondary air. Turbine air classifier achieves precise classification under a reasonable

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solid-gas flow, centrifugal force interacts against air drag accurately classifies raw
material. And revolving speed is controlled by a frequency converter.
d. Cyclone Collector
Thecyclone separator is a kind of equipment used for separating gas solid system.
The working principle is the rotary motion caused by the tangential direction of air
flow, so that solid particles or droplets with larger inertial centrifugal force can be
thrown away from the wall. The main features of cyclone separator are simple
structure, large operation flexibility, high efficiency, convenient management and
maintenance.
e. High-efficient Cartridge Collector
High Efficient Cartridge Collector is made up of housing, filter, electro-magnetic
pulse valve, reducing valve, pulse control meter etc. Filter surface covered with
polyester filtering material makes a high precise filtration, large filtering areas and less
pressure loss. It is mainly used for collecting final product and purifying air.
f. Blower
Blower is the power source of the whole system, which will keep negative
pressure during the operation of the system, so as to realize the flowing of materials
and air flow in the system.
g. Discharge System
The discharge system consists of double pneumatic butterfly valve and product
collect silo.
h. Temperature Control System
The heat exchanger is used to cool the air output from the blower. And the
temperature sensor is used to monitor the air temperature of the system in real-time.
The temperature of the air flow in the system is controlled in a certain range by using
PLC and the cooling system to ensure the safety of the system.
i. Safe Filter
The function of the safe filter is to prevent impurity into mill and to avoid the

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powder stuck, which is equipped with differential pressure display and alarm.
j. Electrical Control System with Touch Screen
Touch screen electronic control system is mainly composed of an electric control
system, touch screen, PLC and other components which could control the equipment
by using a button to automatically start and stop operation, and automatic filling argon,
automatic balancing of the system pressure in the operation process, display the
running state of the equipment online and other functions.
1.3 Main Power Configuration
1.4 Main Specifications and Characters
This pulverization & classification system has following advantages：
☆The finer size of the finished product is smaller than the ordinary mechanical
mill, and the high efficiency turbine classifier is configured to remove the qualified
products after crushing so as to avoid smashing.
☆The wearing parts are wear resistant spray treatment to improve the service life
of the wearing parts.
☆Less vulnerable parts of the system and simple maintenance.
☆Reasonable and uniform flow control can effectively avoid over crushing.
☆The system can produce products with narrow particle size distribution, and
the granularity is easy to adjust.
☆Fully sealed operation，no environment pollution.
Name
Power
Qty/unit
Note
Screw Feeder
0.37kw
1 set
480V/60Hz
Impact Mill
7.5kw
1 set
480V/60Hz
Classifier
1.5kw
1 set
480V/60Hz
Blower
7.5w
1 set
480V/60Hz

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2. Main technical parameters and technological process
2.1 Main Technical Parameters
LNIST-45A
Input Size
2-8mm
Output Size
D50=10μm，D100=40μm
Capacity
10kg/h
Power Supply
480V,60Hz
2.2 Technological Process
Raw Material
Cyclone
Collector
Dust collector
Product 2
Classifier
Impact Mill
Product 1
Coarse Powder

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3. Installation and Commissioning &SOP
3.1Installation and Commissioning
3.1.1 Installation
a. The unit fixing position is generally based on process flowchart and installation
sketch;
b. The elbow should be reduced as far as possible. The specifications and
materials of pipes and valves should meet the requirements of air pressure parameters.;
c. Equipment should be installed horizontally. Connectors between seal case and
pipeline fitting should be very fasten to prevent leakage;
d. Open head cover of collector when installing it and make sure bag layering is
compressed to avoid leakage;
e. Make sure the electrical connecting bolts are tight enough then connect to the
electricity supply with all electrical appliances installed on reliable ground.
3.1.2 Commissioning
a. Electrical control cabinet debugging, power up to check whether the power
supply is missing, the controllers and buttons are normal, the frequency converter
parameters are set, and whether the thermal relay setting of each motor is in the safe
range;
b. Classifier debugging, the frequency of the classifier is gradually increased
from 5Hz to 50Hz, to check whether the rotation direction of the classifier is correct,
whether the classifier current is normal, whether the classifier has abnormal sound,
and whether the bearing temperature of the classifier is normal;
c. When the classifier is opened, the blower is started to check whether the
running direction of the blower is correct (Here marks classifier rotating direction on
the belt cover), whether the current is normal, whether the blower has the abnormal
noise and the bearing temperature of the blower is normal;
d. In the case of the opening of the classifier and the blower, the impact mill is
started to check whether the rotating direction of the smashing host is correct (The
rotation direction of the host is opposite to the classifier), the current is normal (The

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no-load current is about 1/3 of the rated current), whether the bearing has abnormal
noise and the temperature is too high;
e. Control the jet pressure to 0.5～0.7Mpa. Adjust the dust collector pulse
controller, set a suitable time interval and bandwidth.
3.2 Standard Operating Procedure
3.2.1 Preparation Before Starting Up
a. Check whether the impact mill, classifier, pipe and valve are in good condition;
b. Sufficient materials, packaging and testing equipment needed for the
experiment;
c. Close the power main gate, connect the power supply, check whether the
voltage output is normal, and whether the three-phase is average.
3.2.2 Starting Procedure
a. Open the main power supply;
b. Open the total control valve of nitrogen and the total valve of pneumatic valve;
c. Adjust the frequency of the classifier to the required frequency and check the
rotating direction of the classifier to start the classifier. Then start the blower after
stable operation of classifier;
d. Open the impact mill after normal operation of classifier and blower;
e. Open the pulse meter, and the pulse cleaning pressure is adjusted to 0.5Mpa to
0.7Mpa, and the interval of ash clearing is adjusted to 1-2min;
f. Turn on the screw feeder and start feeding.
Pulse valve
Classifier
Main air control valve
Main power
Impact mill
Blower
Screw feeder

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3.2.3 Shutdown Procedure
a. Shutoff the screw feeder;
b. After stopping feeding, run the crushing machine 5-20min, and turn off the
main engine when the main current is around 10-15A;
c. Close the blower after closing the mill 1-2min;
d. Close the classifier while the air volume is very small;
e. The pulse valve is closed after one cycle, and close the pulse injection control
system;
f. Turn off the discharge valve, and the main power supply.
Note ： Shut down the classifier when the negative pressure of the system is very small.
3.2.4 Announcements During Equipment Operating
1. The procedure of opening and closing the machine is strictly carried out; The
whole machine is in a state of negative pressure. If the program is not strictly executed,
the powder is easy to brought into the bearing, and it is destructive to the equipment
and even cannot be repaired;
2. Strictly prohibit any hard impurities such as iron nails in the raw material to
enter the crushing machine, otherwise the hammer head and the crushing track will be
damaged. If a similar impurity is detected, the system should be shut down
immediately, and the internal cavity of the crushing chamber must be cleaned up
before it can be restarted;
3. Observe the current change of the mill and classifier frequency converter. It is
strictly forbidden that the classifier current exceeds the rated current of the motor. If
the current is found to be high, it is necessary to stop feeding or stopping immediately,
Classifier
Air pump
Main power
Blower
Feeder
Pulser
Impact mill

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and remove the excess material in the classification cavity before starting operation
again;
4. Observe the negative pressure in the classification cavity, and the negative
pressure is necessary for the system normal running. If the negative pressure is low, it
means that the amount of material in the classification chamber is too large, so the
amount of the feeder should be reduced;
5. The classifier current should not exceed 10A of the rated current of the motor,
and the blower cannot exceed 25A;
6. The dust in the dust collector cannot be accumulated too much and the ash
cleaning pressure is 0.5Mpa-0.6Mpa;
7. The higher the frequency of the classifier, the lower the negative pressure (high
material level, more material), and the finer grain size we can get. On the contrary, the
lower the frequency of the classifier, the higher the negative pressure (low material
position, less material), and the coarsely processed grain size;
8. Observe the change of the current of the blower, if abnormal, check
immediately;
9. Check lubrication status of rotating parts regularly, such as impact mill,
classifier and blower;
10. Clean the dust in the switchgear regularly, keep the cabinet clean and dry;
11. Keep the working environment temperature of air compressor under 40℃to
maintain the service life of it.

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4. Influences on Pulverization & Classification Efficiency
4.1 Material Property
Normally impact grinding host complies to all kinds of brittle materials when
final grinding result differs a lot due to various material properties which include
different hardness, intensity, density, plasticity and toughness, morphology, viscosity,
electric performance etc. Intensity is the most relevant factor. Some materials with a
high moisture content or supplied air contains water, oil will also affect and make the
material properties different (e.g. toughness, viscosity, and brittle etc.) which will
result in product pollution and finally influence the product quality.
Classifying precision in single classifier system influenced much by material
adhesion, electrostatic reunion and moisture. It would be better to reduce those
material properties when classifying.
4.2 Moisture Content
Water content on grinding of raw materials production has a very big influence.
Generally speaking, the material moisture content is smaller, the greater the yield, but
the water content of raw materials in large quantities cannot be zero, so as long as the
moisture content of raw material in grow at below 6% is also possible, but when the
water content is greater than 6%, even 10% above, has a great effect on yield is
crushed. Therefore, in the process of crushing, you should try to control the moisture
content of raw material, keep dry.
4.3 Loading Weight
Final particle fineness of same material differs due to different feeding capacity.
Ceteris paribus, feeding more leads to a wider final particle size distribution; less
collision between particles when feeding less will ultimately influence the final
fineness. Changing feeding capacity aims to reach the best grinding gas-solid ratio.
High requirements on unbreakable material has a larger gas-solid ratio.
Feeding capacity and uniformity effect classifying efficiency much in single

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classifying system. Not enough feeding makes a small gas-solid produces
concentration coarser particle finally results in a lower classifying efficiency; Too
much feeding leads to a high gas-solid concentration, low produce capacity and
efficiency.
4.4 Input Particle Size
Grind material with different particle size, the final size distribution various.
Smaller input particle size, smaller output size. Larger input size, larger size reduction
ration and vice versa. Larger hardness while finer output size requires a small input
particle size.
4.5 Input Particle Size Distribution
Particle size distribution also measures the product quality which has much to do
with input particle size distribution. Generally, a uniform input particle size
distribution leads to a good final particle fineness and distribution. Processing material
with a wider size distribution indicates differentiating fineness, coarse powder impacts
with finer powder during grinding has a nonuniform results. To solve this problem,
just separately grind coarser and finer powder sieved before by sieving machine.
In classifying system, origin particle size and its distribution have great impact
on classifying efficiency and precision. 5－45μm is an easy classifying rage. Other
size distribution such as over 45μm or less than 5μm has lower final precision.
Classifying either material at least 30% reaches its highest efficiency and precision. If
there is a smaller content in one of the both materials, the classifying precision will
drop along with the reduced gas-solid concentration.
4.6 Raw Material Compositions
Individual or mixture make a huge difference on grinding efficiency. Components
in mixture with different properties make various results. Grinding individual material
performance better.

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5. Equipment Maintenance & Repair
Do regularly maintain classifier, blower, dust collector to make sure a product
quality stability and longer service life.
5.1 Maintenance & Repair
5.1.1 Auxiliaries
(1) Operate blower with regulations;
(2) Air-pulse gauge, frequency converter, electric cabinet, please see their
instructions. Clean dust in cabinet regularly.
5.1.2 Air classifier
(1) Adjust belt fasten in classifier after running one week;
(2) Check wear patterns of classifier wheel regularly;
(3) Bearings in classifier are imported and fully sealed. Greasing every 300h
running, change it once found loose;
(4) In order to not affect the efficiency of classification, clean the powder that are
adhesive on the classification chamber and classification wheel every 300h.
5.1.3 Dust Collector
(1) The system negative pressure should be a certain rage as pulse jet control
device is normally working. Clean or change the filter when it changes too much;
(2) Regularly check the outlet of blower, there should be no powder. Carefully
inspect the cartridge filter for damage and breakage and solve without delay.
5.1.4 Electronic Control System
(1) Do close electronic control system doors during working to prevent powder
entering; Regularly check dust to avoid short circuit caused by conductive material;
(2) Water-proof, damp-proof, keep dry.
5.1.5 Others
Lubrication：check all lubricating points in main and auxiliary equipment, charge
in need;

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(2) Inspect equipment air-tightness, check temperature of all motors and cables,
solve promptly if abnormal;
(3) Doing whole system overhauled and maintained after 600h;
(4) Regularly check the wear pattern of each the connection pipe and bent，if
there is any wear, please process or replace in time.
5.2 How to Replace Classifier Bearings
Do install bearings as below. Never knock bearings and shafts with steel hammer.
Installation steps are as follows:
(Step 1). Clean new bearing with petrol or diesel, airing it. No powder remain
between bearing balls and its jacket;
(Step 2). Remove broken bearing;
Get out belt pulley with tool, take down upper bearing cover, knock on upper
bearing toward lower bearing with hammer to make the main bearing and classifier
wheel out of bearing box, clean and airing bearing;
Take down lower bearing cover, knock inner ring in upper bearing cover with
special tool, knock broken bearing out of box;
Inspect the bearing box, if there are some sundries, clean up before installing new
bearing.
Notice: In step1 mustn’t knock main bearing directly with hammer, put copper
bar between.
(Step3). Charge lubrication grease after bearings cleaned and dried;
Notice: Grease should be better at 1/3 ～ 1/2 top of bearing.
Clean up used lubrication in both upper and lower bearing cover groove then
charge better until 2/3 of the groove top.
Notice: Lubrication grease is a special kind bearing 200 ℃ .
(Step4). Put upper, lower bearings with lubrication grease into bearing box,
install both covers;
Notice: (1) Mustn’t exchange order of upper bearing with lower bearing;
(2) Do not install lower bearing in a wrong direction, wide side of lower
bearings downward (toward classifier);

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(3) Never knock bearing outer ring at will when installing bearing, should
use special tool to make the bearing inner ring in place.
(Step 5). Knock the main bearing and classifier into bearing box from above, and
pay more attention to following items:
Don’t knock the bottom of classifier wheel by hammer, should place soft
materials such as copper bar, sticks on the classifier wheel before;
Once main bearing in place, knock downward it slightly, the space between upper
classifier wheel and support plate should be less than 1mm.
(Step 6). Alignment of the hole between main bearing and its jacket, fix them;
(Step 7). Gently rotate classifier wheel, make sure it can rotate freely;
(Step 8). Finish bearing installation, reinstall belt pulley.

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6. Familiar Malfunction & Exclusion Methods
Malfunction
Cause
Method
Insufficient
system negative
pressure
1.The cleaning strength of
dust collector is not enough
2.The cartridge filter is
damp
3. Not discharge in time
1.Increase pulse frequency or pulse width
2.Remove moisture in system promptly
3.Discharge in time (every 5-10 minutes)
Over size
product
1. Nonuniform feeding
2.Too little material stock in
the classifier
3.Low rotating speed of air
classifier
4.There is air leakage in
system joint
1.Set a vibrator feeding frequency, make sure
a uniform feeding
2.Add more material in feeder to increase the
gas-solid concentration
3.Adjust a high rotary speed
4.Inspect the airtightness of system
High
temperature in
classifier wheel
bearings
1.Insufficient lubrication
2.Powder get into bearings
3.Failure of dynamic
balance in classifier wheel
1. Charge lubrication grease as maintenance
requirement
2. Make sure the air seal valve does work;
Clean up powder in classifier wheel and do
regular maintenance
3.Make a new classifier wheel dynamic
balance
Too much dust
in the outlet of
blower
1.Breakage in cartridge
filter
2.Leakage in connector
between filter and flower
board
1.Inspect and replace broken cartridge filter
2.Seal the joint

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Notice
Do carefully read operating instruction and announcements!
Please do maintaining in accordance with the operating instruction ！
Customer Service Hotline: [phone]
Spare Parts Purchase ：[phone]，[phone]
Email: [email protected]om.cn
Customer Service Consultant：[phone]（Engineer Zhang）
Email: [email protected]
Mianyang Liuneng Powder Equipment Co., Ltd
May 2018

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Enclosure 1 Control Cabinet Operation Instructions
1．Overview
The cabinet applies to the rated voltage 380V, 50Hz, rated current 10A power
system.
2．Constitution
This control cabinet is a single open power distribution device, its basic structure
is made of steel plate bending and angle steel welding, the front right side can be
installed switch operation handle, the cabinet door can be installed operation button,
led, display instrument. All the electrical parts inside is easy to overhaul and
maintenance. The control cabinet is equipped with air circuit breaker, fuse, as the
circuit breaker protection device. Which also equipped with contactor and thermal
relay. The casing body is welded with ground bolts to ensure that the cabinet body is
connected with the ground reliably.
3．Normal Working and Installation Conditions
3.1 Environment temperature 5-40℃, and within 24 hours the average temperature
does not exceed 35 ℃;
3.2 Altitude: not more than 2000m;
3.3 Humidity: 40℃, the humidity does not exceed 50%; 20 ℃, the humidity not more
than 90%;
3.4 Installation vertical slope should be not more than 5 °, the equipment should be
installed in the place no violent vibration and impact-free, corrosion-free.
4．Acceptance, Installation, Commissioning
After the arrival of goods, check the package first to make sure there is no
breakage. Troubleshoots problems promptly before installation. Then debug as
follows:

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4.1 Inspect the cabinet finish coat to see if there is any falling off and whether it’s dry
and clean inner the cabinet;
4.2 Binding post should be fastened;
4.3 Main electrical appliances and auxiliary contacts should be reliable and accurate;
4.4 Selecting of major components, connection principle is strict in accordance with
electrical diagram;
4.5The insulation resistance should be no less than 1M, release the connection of some
low voltage electrical components while testing with 500V megohm.
5．Control Principle
5.1 The particle size can be controlled by adjusting the rotating speed of the classifier,
and the speed of the classifier can be adjusted by changing the output frequency of the
frequency converter;
5.2 The pulse control instrument controls the injection intensity of the pulse injection
valve by pre-set pulse cycle and pulse time, so as to achieve the purpose of automatic
and uniform dust cleaning of dust collector and ensure the stable running of the
collector;
5.3 The current overload protection device can effectively guarantee the stable
operation of the classifier, blower etc.
6．Attention Items：
6.1 Low-voltage air circuit breaker will produce some carbon goods and lead to local
damage in main contact head which increases contact resistance after many times
switching. So periodic repair and maintenance is necessary;
6.2 The control system alarm and manual emergency shutdown for unusual conditions;
6.3 In case of emergency stop, the inlet valve should be closed in time to ensure the
product quality.