This standard specifies the test method for the grindability of raw materials in MLS grinding systems, providing a basis for the selection of MLS vertical cement mills. This standard applies to MLS grinding systems for grinding cement raw materials, gypsum, quicklime and other building materials. This standard does not apply to MLN grinding systems for grinding cement clinker. JB/T 6117-2002 MLS grinding system raw material grindability test method JB/T6117-2002 Standard download and decompression password: www.bzxz.net

ICS73.120
D94
JB
Machinery Industry Standard of the People's Republic of China
JB/T6117—2002
replaces JB/T6117—1992||tt || Grindability test procedure for MLS grinding system raw material grindability test method Published on 2002-07-16
Implemented on 2002-12-01
Foreword issued by the National Economic and Trade Commission of the People's Republic of China
Scope.
2 Terms and definitions, symbols..
Test conditions.
3
Test system equipment and instruments
4
5 Test Content and procedure.
5.1 Preparation of test materials
5.2 Operation steps
5.3 Processing of test data
Calibration of test system
6||tt ||Test Report
Object
Times
JB/T6117-2002
Foreword
This standard replaces JB/T6117-1992 "ML.S Test Method for Grindability of Raw Materials in Grinding Systems》JB/T6117-2002
Compared with JB/T6117-1992, this standard has only made abbreviation modifications and adjustments to some contents, and the main technical content has not changed much. . This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Mining Machinery Standardization Technical Committee (SAC/TC88). This standard is drafted by Shenyang Heavy Machinery Group Co., Ltd. The main drafter of this standard: Lin Fang.
m
1 scope
MLS grinding system raw material grindability test method JB/T61172002
This standard specifies the MLS grinding system raw material grindability test method , providing a basis for selecting MLS vertical cement mill. This standard applies to MLS grinding systems for grinding cement raw materials, gypsum, quicklime and other building materials. This standard does not apply to MLN grinding systems for grinding cement clinker. 2 Terms, definitions and symbols
The following terms and definitions apply to this standard. 2.1
test output
testcapacity
The weight obtained by the test mill in unit time. The symbol of the base: m.
Unit: kg/h.
2.2
Specific power consumption specificpowerconsumpion The work consumed by the test mill to obtain the finished product per unit weight (located at the coupling end). Symbol of quantity: P.
Unit: kW·h/t.
2.3
Wear specifiewear
The metal weight of the test mill wear parts (grinding disc and grinding lining plate) consumed per unit weight of finished product. Symbol of quantity: T.
Unit: g/t.
3 Test conditions
The test should meet the following requirements:
Mill speed: (107±1) r/min;
a)
b )
c)
d)
e)
f
g)
h)
4|| tt||Air inlet pressure: -100Pa:
Air outlet pressure: -2200Pa:
Sealing wind pressure: 20002500) Pa:
Single roller pressure:
Fan air volume:
(5615±50)N:
(1000±10) m2/h:
Mill outlet temperature: (80±5)℃:||tt| |Feeding particle size: no more than 8mm.
Test system equipment and instruments
4.1
The test system and main measuring points are shown in Figure 1.
Other appliances:
4.2
a) Material receiving bag:
JB/T6117—2002
b) Timing alarm device: ||tt ||c) Balance 0g～100g, accuracy ±0.01g: d) Balance 0kg～50kg, accuracy ±0.1kg: e) Balance 0kg～100kg, accuracy ±0.2kg: fobZxz.net
Several sieves (according to user requirements Fineness preparation) One control cabinet:
One mill transmission device:
Bin:
One feeding device:
Test mill: ||tt ||6—Separator transmission device
5 Test content and procedure
5.1 Preparation of test materials
8
9
Sealing fan:| |tt||Hot blast stove;
Dongfeng dust collector:
10—Pipeline:
11-
12-
:
System fan:
5.1.1 The weight of the material for each test is 800kg~1000kg. 5.1.2 The feed particle size distribution should meet the requirements of Table 1. Figure 1
13
14
15
Pulse bag dust collector:
Smoke exhaust:
Dust collector fan.
Pressure difference measuring point:
-Height divider speed measuring point:
Outlet temperature sub-point:
5.1.3 For moisture measurement of various materials, it should be In compliance with the test requirements, the error should be less than 5%. 5.1.4 Mix various materials evenly in proportion according to the test requirements. Bomb pressure measuring point
Population temperature measuring point:
Pressure difference measuring point.
5.1.5 When the measured moisture content is less than the moisture content required by the test, the missing water should be added evenly and the measurement should be repeated. 5.1.6 The water-added materials should be placed for 2 hours before testing. Table 1
Standard sieve specifications
5.0
4.0
3.0
2.0
1.0
0.4||tt| |2
mm
sieve residue
%
5
10
20
35||tt| |58
88
Error
±0.5
±1.0
±2.0
±5.0
±8.0| |tt||±10.0
5.2 Operation steps
5.2.1 Adjust the timing alarm device to continuously alarm every 3 minutes. 5.2.2 Start the test system according to the following procedure: Start the sealing fan:
a)
Start the separator transmission device;
b)
Start the pulse bag Dust collector:
c)
Start the cyclone dust collector:
e)
Start the system fan and adjust the air volume to the specified value: f||tt ||Start the hot blast stove:
When the mill outlet temperature reaches 85℃: start the feeding device; g)
h)
Feeding:
Start the mill Machine transmission device.
When the grinding system enters the normal operating state, the control circuit is transferred to the automatic operating state. 5.2.3
5.2.4
Pick up the finished product at the material receiving port every 3 minutes, weigh G on a flat surface of 0kg to 100kg, and make a record. 5.2.5 Timely transfer the The data displayed by the instrument is recorded. JB/T6117-2002
5.2.6 Fineness analysis: Take a sample from each bag of finished product, weigh out 10g with a 0g~100g balance, pour it into the standard sieve with the required fineness for the test, and start the pneumatic screening machine. After working for 3 minutes and automatically shutting down, weigh the material on the screen with a balance, calculate the percentage of screen residue, and keep records.
5.2.7 According to the results of fineness analysis, adjust the speed of the separator so that the product reaches the fineness required by the user. When the fineness is stabilized at this fineness for three consecutive times, the grinding test is completed.
5.2.8 Shut down according to the following procedure:
a) Close the feeding device:
b) Close the hot blast stove:
Close the mill transmission device: || tt||Close the pulse cloth dust collector:
d)
Close the yin system fan:
e)
Close the separator transmission: ||tt ||f
g) Turn off the sealing fan.
5.2.9. Weighing of wear parts: Disassemble the mill, take out the grinding disc and grinding plate, soak them in an acetic acid solution with a temperature of 45°C to 55°C and a mass fraction of 5%, and remove the adhering parts after 5 to 10 minutes. Material particles on the village board. After it is ventilated and dried, weigh the weight on a scale of 0kg~50kg and make a record. Then, reassemble the grinder. 5.3 Processing of test data
5.3.1 The test output m is calculated according to formula (1): m
In the formula:
G
The output at -3min, unit is kg.
5.3.2 Specific power consumption P is calculated according to formula (2):
G×60
P=(0.852Ps-1.727)X 1.24
where:
P
P,=
G
P,
The unit is kW·h/t:
Record the power consumption for 3 minutes :
·(1)
2)
3
JB/T6117—2002
Others are empirical coefficients.
5.33 wear 7 is calculated according to formula (3):
where:
T
7-5-7
m
The weight of the grinding disc grinding lining weighed after this test: 2 - the weight recorded after the last test:
m2
6
The total output of the test.
Calibration of test system
6.1
6.2
7
The control instruments of the test device should be regularly sent to the measurement department for verification. A material with constant grindability is fixed and tested regularly to calibrate the test parameters. Test report
The test report should include the following contents:
a) General data:
b) Characteristics of the test material:
c) Test results and evaluation.
-(3)
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.