JB/T 3686.2-1999 Test methods for coal flotation machines

JB/T 3686.2-1999 This standard is a revision of JB 3686-84 "Test Methods for Flotation Machines for XJM Shaped Coal". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard specifies the test items and methods for mechanical performance tests, water cleanliness tests and industrial tests of coal flotation machines. This standard is applicable to the performance tests of coal flotation machines and can also be used for the performance tests of mining flotation machines. JB/T 3686.2-1999 Test Methods for Flotation Machines for Coal JB/T3686.2-1999 Standard download decompression password: www.bzxz.net

ICS73.120
Machinery Industry Standard of the People's Republic of China
JB/T3686.2-1999
Flotation machine for coal
, Test methods
Test methods of subaeration machine for coal1999-06-28 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T3686.2—1999
This standard is a revision of JB368684 "Test methods for flotation machine for XJM shaped coal". During the revision, the original standard was edited and the main technical content was unchanged. The appendix A and appendix B of this standard are both reminder appendices. This standard replaces JB3686—84 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Mining Machinery. The responsible drafting unit of this standard: Luoyang Mining Machinery Research Institute. The main drafters of this standard are: Li Zeli, Zhang Xueqian, Xu Hua, Zhang Honghui, Huang Jialin. 1 Scope
Machinery Industry Standard of the People's Republic of China
Test methods of subaeration machine for coal
Test methods of subaeration machine for coal JB/T3686.2—1999
Replaces JB368684
This standard specifies the test items and methods for mechanical performance test, clean water performance test and industrial test of coal flotation machine. This standard is mainly applicable to the performance test of coal flotation machine, and can also be used for the performance test of mining flotation machine. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T 2121991
GB/T3768-1996
MT57—1993
MT581993
3 Test items and requirements
3.1 Test items include:
a) Mechanical properties test;
b) Clean water performance test:
c) Industrial test.
Industrial analysis method of coal
Acoustic sound pressure method for determining the sound power level of noise source Simple method using envelope measurement surface above the reflecting surface Coal powder floating and sinking test method
Coal powder screening test method
3.2 All new products or products after major improvements, as well as flotation machines produced by transferred factories, should be subject to the above tests. For products that have been mass-produced, only mechanical properties tests should be performed.
4 Mechanical performance test
4.1 Test content
4.1.1 Determine the horizontality and straightness of the overflow weirs on both sides of the tank body. 4.1.2 Leakage test.
4.1.3 Idle running test.
4.2 Preparation before test
4.2.1 The assembled flotation machine should be installed on the test bench and connected to the water supply pipe and power supply. 4.2.2 The test instruments are as follows:
a) Level meter:
b) Semiconductor point thermometer (0~100℃): C) ND2 type precision sound level meter:
Approved by the State Bureau of Machinery Industry on June 28, 1999 and implemented on January 1, 2000
d) Tachometer.
4.3 Test method
JB/T3686.2—1999
4.3.1 Check the sealing between the tank body, the middle ore box and the tail box with clean water or other methods. No leakage is allowed. 4.3.2 After the flotation machine is assembled, use a level to measure the levelness of the two sides of the tank body, and use the wire drawing method to measure the straightness of the two sides of the tank body. 4.3.3 The stirring mechanism should be operated at no load for 2 hours, and the following items should be inspected: a) Use a semiconductor point thermometer to measure the bearing temperature rise; b) Use an ND2 sound level meter to measure the flotation machine noise according to the requirements of GB/T3768; c) Use a tachometer to measure the speed and determine the impeller linear speed. 4.3.4 The mechanical performance test results shall be recorded in the manufacturer's factory technical documents. 5 Clean water performance test
5.1 Test contents include:
a) Impeller water absorption;
b) Air filling volume;
c) Agitator motor input power:
d) Flotation tank liquid level stability;
e) Circulation volume.
5.2 Preparation before test
5.2.1 The technical specifications of the flotation machine shall be filled in according to Table A1 in Appendix A (Suggested Appendix). 5.2.2 The test prototype shall be installed on the test bench, as shown in Figure B1 in Appendix B (Suggested Appendix), and connected to the water supply pipe and power supply. 5.2.3 Check the installation quality of the machine.
5.2.4 Pour clean water into the flotation tank and adjust the water level to 100mm below the overflow weir. 5.3 Test instruments:
a) Electromagnetic flowmeter:
b) Three-phase power meter and current transformer (accuracy not less than 0.5 level); c) Measuring cylinder:
d) Stopwatch.
5.4 Test method
5.4.1 Determination of water absorption of impeller:
a) The installation position of electromagnetic flowmeter is shown in Figure B1 in Appendix B; b) The reading of electromagnetic flowmeter shall be measured once every 30 minutes, not less than three times, and the reading shall be converted into actual flow and recorded in Table A2 in Appendix A.
5.4.2 Determination of inflation volume:
a) Divide the flotation tank liquid surface into 24 measuring points. The distribution of measuring points is shown in Table A3 of Appendix A: b) Fill the measuring cylinder with clean water and place it vertically upside down on the measuring point of the flotation tank liquid surface, as shown in Figure B2 of Appendix B. Use the drainage gas collection method to determine the time required to discharge a certain amount of clean water from the cylinder. Each measuring point should be tested three times, and the average value is taken to calculate the inflation volume of each measuring point 9; c) Convert the obtained data into inflation volume and record it in Table A4 of Appendix A; 2
JB/T3686.2—1999
Where: 9—i-th measuring point Unit area inflation, m/(min·m2); Volume of clean water discharged from the measuring cylinder, cm
F Cross-sectional area of ​​the measuring cylinder, cm2
t--Time required to discharge volume V of clean water from the measuring cylinder, sd) Flotation tank inflation uniformity coefficient:
×100%
K=100%
Wherein: K-
Inflation uniformity coefficient;
Unit area inflation of the ith measuring point, m3 (min: m2) - Average unit area inflation of all measuring points, m2/(min·m2); Number of measuring points.
5.4.3 Determination of input power of the stirring mechanism motor: a) Use a three-phase power meter and a current transformer to measure the input power of the motor; b) Calculation of the power index of the flotation machine:
Where: -
Power index of the flotation machine, m/(min·kW): - Average unit area of ​​gas filling of all measuring points, m/(min·m): F
- Measured liquid surface area of ​​the flotation cell, m:
N - Actual power consumption of a single cell of the flotation machine, kW.
c) Record the measurement results in Table A5 of Appendix A. 5.4.4 Stability of the liquid surface of the flotation cell
Visually inspect the stability of the liquid surface, and no fluttering is allowed. 5.4.5 Determination of circulation volume:
a) The circulation volume measurement device is shown in Figure B3 in Appendix B; b) When the flotation machine is operating normally, adjust valve 3 to keep the liquid level in the water level box and the liquid level in the flotation tank at the same level; (1)
c) Record the reading of the electromagnetic flowmeter at this time and convert it into actual flow. The time interval between each measurement is 15 minutes, and the number of measurements is not less than three times;
d) The circulation volume is calculated according to the following formula:
Where: "—circulation volume, m2/h;
Total number of circulation holes:
9—actual flow measured by the electromagnetic flowmeter, m/h; e) The test results are recorded in Table A6 in Appendix A. (4)
JB/T3686.2—1999
5.4.6 Clear The results of the water test are summarized and recorded in Table A7 of Appendix A. 6 Industrial test
6.1 The test content includes:
a) Determination of coal slurry throughput;
b) Determination of the input power of the stirring mechanism motor: c) Determination of reagent consumption;
d) Determination of flotation effect.
6.2 Preparation before the test
6.2.1 The flotation machine is included in the flotation process after installation and commissioning in the coal preparation plant. 6.2.2 The feed coal slurry should be controlled within the following range: a) Concentration: 60g/L~160g/L:
b) Particle size: below 0.5mm.
6.2.3 Test instruments:
a) Electromagnetic flowmeter:
b) Three-phase power meter and current transformer (accuracy not less than 0.5 level): c) measuring cup (volume 30mL);
d) stopwatch:
e) common instruments in the laboratory of coal preparation plant.
6.3 Test method
6.3.1 Determination of coal slurry flow rate:
a) Install the electromagnetic flowmeter between the mixing barrel and the first chamber of the flotation machine; b) Record the reading of the electromagnetic flowmeter only after the flotation machine is running normally. The time interval for each recording is 30min, and the number of recordings is not less than three times. The readings are converted into actual flow and recorded in Table A2 of Appendix A. 6.3.2 The input power of the stirring mechanism motor shall be measured in accordance with the requirements of 5.4.3. 6.3.3 Determination of reagent consumption:
a) Use a measuring cup to measure the amount of reagent at each dosing point of the flotation machine, and use a stopwatch to measure the time required to add a volume of reagent V. The reagent consumption is calculated according to the following formula:
Where: qi—the reagent consumption of the ith dosing point, kg/h; V is the volume of reagent measured by the measuring cup, mL:
Specific gravity of reagent, g/mL
The dosing time of the ith dosing point, s.
The total reagent consumption of the flotation machine is the sum of the reagent consumption of each dosing point. Mqi
Where: q—total reagent consumption of the flotation machine, kg/h; 4
n—number of dosing points of the flotation machine;
JB/T3686.2—1999
4—the reagent consumption of the ith dosing point, kg/h. b) The reagent consumption of the flotation machine for each ton of dry coal slime: A=9
Where: A—the reagent consumption of the flotation machine for each ton of dry coal slime, kg/t: 9—the processing capacity of the flotation machine, t/h.
c) The measurement results shall be recorded in Table A8 of Appendix A. 6.3.4 Determination of flotation effect:
a) The sampling points are shown in Figure B4 of Appendix B: (7)
b) When the flotation machine is operating normally, sampling shall be carried out. The number of samplings shall not be less than eight times, and the time interval between each sampling is 30 minutes: c) The flotation feed and flotation discharge shall be subjected to concentration measurement, ash content measurement, coal powder floating and sinking test and coal powder screening test. The concentration shall be determined in accordance with relevant regulations, the ash content shall be determined in accordance with GB/T212, the coal powder floating and sinking test shall be carried out in accordance with MT57, and the results shall be recorded in Table A9 of Appendix A. The coal powder screening test shall be carried out in accordance with MT58, and the results shall be recorded in Table A10 of Appendix A. d) Flotation clean coal yield
In the formula: 2
Clean coal yield;
Ag1—Feed coal slurry ash content:
4g2Flotation clean coal ash content;
Ag3——Flotation tail coal ash content.
Ag3—Agl
Ag3-Ag2
Record the calculated results in Table A11 of Appendix A. ×100%
6.3.5Summarize the industrial test results and record them in Table A12 of Appendix A. (8)
Flotation machine model:
Impeller slurry suction volume
Channel size
Effective volume of single tank
Agitator motor
Agitator bearing temperature rise
Scraper motor
Scraper reducer
Foam scraper speed
Machine overall dimensions
Machine weight
Test person in charge:||t t||JB/T3686.2—1999
Appendix A
(Suggested Appendix)
Test Record
Flotation Machine Technical Specifications
Manufacturer Name:
Lower Dimensions
Upper Dimensions
Circumferential Speed
Record:
Test Prototype Model:
Test Prototype Code:
Electromagnetic Current Meter model:
Test medium:
Test number
Test person in charge:
JB/T3686.2-1999
Impeller water absorption (slurry) test record
Test date:
Test number:
Test location:
Test time
Average flow
Flowmeter reading
Measurement:| |tt||Record:
Test prototype model:
Test prototype code:
Floatation tank serial number:
Impeller water absorption:
Test serial number:
Test time:
Test person in charge:
JB/T3686.2—1999
Table A3 Inflation volume test record
Fill in the test value.
→ is the coordinate of the measuring point.
Measurement:
Test date:
Test number:
Test location:
Average air volume per unit area:
Aeration coefficient:
Year/month/day
m/(min·m2)
Record:
Test prototype model:
Test prototype code:
Impeller water absorption:
First chamber
m/(min·m2)
Test person in charge:
Second chamber
Table A4 Air volume test table|| tt||Room 3
m(min·m)
Room 4
m/(min*m)
Measurement:
Test date:
Test number:
Test location:
Room 5
m/(min·m2)
Year/month/day
Room 6
m/(min*m)
Record:
JB/T3686.2-1999
Test prototype model:
Test prototype code:
Power meter model:
Current transformer model
Number of tests
Test person in charge:
Test prototype model:
Test prototype code:
Test time
JB/T3686.2—1999
Stirring mechanism motor input power test recordTest date:
Test number:
Test location:
Impeller water (slurry) absorption:
Motor input power
First room
Second room
Measurement:
Room 3
Room 4
Table A6 Circulation volume test record
Test date:
Test number:
Impeller water (slurry) absorption:
Number of tests
Test person in charge:
Test time
Room 1
Room 2
Measurement:
Test location:
Room 3
Room 4
Room 5
Record:
Room 5
Record:
Room 6
Room 64 Determination of flotation effect:
a) Each sampling point is shown in Figure B4 in Appendix B: (7)
b) When the flotation machine is operating normally, sampling should be carried out. The number of samplings should not be less than eight times, and the time interval between each sampling is 30 minutes: c) The flotation feed and flotation discharge should be subjected to concentration measurement, ash content measurement, coal powder floating and sinking test and coal powder screening test. The concentration measurement shall be carried out in accordance with relevant regulations, the ash content measurement shall be carried out in accordance with GB/T212, the coal powder floating and sinking test shall be carried out in accordance with MT57, and the results shall be recorded in Table A9 of Appendix A, and the coal powder screening test shall be carried out in accordance with MT58, and the results shall be recorded in Table A10 of Appendix A. d) Flotation clean coal yield
Where: 2
Clean coal yield;
Ag1—Input coal slurry ash content:
4g2Flotation clean coal ash content;
Ag3——Floatation tail coal ash content.
Ag3—Agl
Ag3-Ag2
Record the calculated results in Table A11 of Appendix A. ×100%
6.3.5Summarize the industrial test results and record them in Table A12 of Appendix A. (8)
Flotation machine model:
Impeller slurry suction volume
Channel size
Effective volume of single tank
Agitator motor
Agitator bearing temperature rise
Scraper motor
Scraper reducer
Foam scraper speed
Machine overall dimensions
Machine weight
Test person in charge:||t t||JB/T3686.2—1999
Appendix A
(Suggested Appendix)
Test Record
Flotation Machine Technical Specifications
Manufacturer Name:
Lower Dimensions
Upper Dimensions
Circumferential Speed
Record:
Test Prototype Model:
Test Prototype Code:
Electromagnetic Current Meter model:
Test medium:
Test number
Test person in charge:
JB/T3686.2-1999
Impeller water absorption (slurry) test record
Test date:
Test number:
Test location:
Test time
Average flow
Flowmeter reading
Measurement:| |tt||Record:
Test prototype model:
Test prototype code:
Floatation tank serial number:
Impeller water absorption:
Test serial number:
Test time:
Test person in charge:
JB/T3686.2—1999
Table A3 Inflation volume test record
Fill in the test value.
→ is the coordinate of the measuring point.
Measurement:
Test date:
Test number:
Test location:
Average air volume per unit area:
Aeration coefficient:
Year/month/day
m/(min·m2)
Record:
Test prototype model:
Test prototype code:
Impeller water absorption:
First chamber
m/(min·m2)
Test person in charge:
Second chamber
Table A4 Air volume test table|| tt||Room 3
m(min·m)
Room 4
m/(min*m)
Measurement:
Test date:
Test number:
Test location:
Room 5
m/(min·m2)
Year/month/day
Room 6
m/(min*m)
Record:
JB/T3686.2-1999
Test prototype model:
Test prototype code:
Power meter model:
Current transformer model
Number of tests
Test person in charge:
Test prototype model:
Test prototype code:
Test time
JB/T3686.2—1999
Stirring mechanism motor input power test recordTest date:
Test number:
Test location:
Impeller water (slurry) absorption:
Motor input power
First room
Second room
Measurement:
Room 3
Room 4
Table A6 Circulation volume test record
Test date:
Test number:
Impeller water (slurry) absorption:
Number of tests
Test person in charge:
Test time
Room 1
Room 2
Measurement:
Test location:
Room 3
Room 4
Room 5
Record:
Room 5
Record:
Room 6
Room 64 Determination of flotation effect:
a) Each sampling point is shown in Figure B4 in Appendix B: (7)
b) When the flotation machine is operating normally, sampling should be carried out. The number of samplings should not be less than eight times, and the time interval between each sampling is 30 minutes: c) The flotation feed and flotation discharge should be subjected to concentration measurement, ash content measurement, coal powder floating and sinking test and coal powder screening test. The concentration measurement shall be carried out in accordance with relevant regulations, the ash content measurement shall be carried out in accordance with GB/T212, the coal powder floating and sinking test shall be carried out in accordance with MT57, and the results shall be recorded in Table A9 of Appendix A, and the coal powder screening test shall be carried out in accordance with MT58, and the results shall be recorded in Table A10 of Appendix A. d) Flotation clean coal yield
Where: 2
Clean coal yield;
Ag1—Input coal slurry ash content:
4g2Flotation clean coal ash content;
Ag3——Floatation tail coal ash content.
Ag3—Agl
Ag3-Ag2
Record the calculated results in Table A11 of Appendix A. ×100%
6.3.5Summarize the industrial test results and record them in Table A12 of Appendix A. (8)
Flotation machine model:
Impeller slurry suction volume
Channel size
Effective volume of single tank
Agitator motor
Agitator bearing temperature rise
Scraper motor
Scraper reducer
Foam scraper speed
Machine overall dimensions
Machine weight
Test person in charge:||t t||JB/T3686.2—1999
Appendix A
(Suggested Appendix)
Test Record
Flotation Machine Technical Specifications
Manufacturer Name:
Lower Dimensions
Upper Dimensions
Circumferential Speed
Record:
Test Prototype Model:
Test Prototype Code:
Electromagnetic Current Meter model:
Test medium:
Test number
Test person in charge:
JB/T3686.2-1999
Impeller water absorption (slurry) test record
Test date:
Test number:
Test location:
Test time
Average flow
Flowmeter reading
Measurement:| |tt||Record:
Test prototype model:
Test prototype code:
Floatation tank serial number:
Impeller water absorption:
Test serial number:
Test time:
Test person in charge:
JB/T3686.2—1999
Table A3 Inflation volume test record
Fill in the test value.
→ is the coordinate of the measuring point.
Measurement:
Test date:
Test number:
Test location:
Average air volume per unit area:
Aeration coefficient:
Year/month/day
m/(min·m2)
Record:
Test prototype model:
Test prototype code:
Impeller water absorption:
First chamber
m/(min·m2)
Test person in charge:
Second chamber
Table A4 Air volume test table|| tt||Room 3
m(min·m)
Room 4
m/(min*m)
Measurement:
Test date:
Test number:
Test location:
Room 5
m/(min·m2)
Year/month/day
Room 6
m/(min*m)
Record:
JB/T3686.2-1999
Test prototype model:
Test prototype code:
Power meter model:
Current transformer model
Number of tests
Test person in charge:
Test prototype model:
Test prototype code:
Test time
JB/T3686.2—1999
Stirring mechanism motor input power test recordTest date:
Test number:
Test location:
Impeller water (slurry) absorption:
Motor input power
First room
Second room
Measurement:
Room 3
Room 4
Table A6 Circulation volume test record
Test date:
Test number:
Impeller water (slurry) absorption:
Number of tests
Test person in charge:
Test time
Room 1
Room 2
Measurement:bzxz.net
Test location:
Room 3
Room 4
Room 5
Record:
Room 5
Record:
Room 6
Room 62—1999
Table A3 Filling volume test record
Fill in the test value.
→ is the coordinate of the measuring point.
Measurement:
Test date:
Test number:
Test location:
Average filling volume per unit area:
Filling uniformity coefficient:
Year, month, day
m/(min·m2)
Record:
Test prototype model:
Test prototype code:
Impeller water absorption:
First chamber
m/(min·m2)
Test person in charge:
Second chamber
Table A4 Filling volume test table|| tt||Room 3
m(min·m)
Room 4
m/(min*m)
Measurement:
Test date:
Test number:
Test location:
Room 5
m/(min·m2)
Year/month/day
Room 6
m/(min*m)
Record:
JB/T3686.2-1999
Test prototype model:
Test prototype code:
Power meter model:
Current transformer model
Number of tests
Test person in charge:
Test prototype model:
Test prototype code:
Test time
JB/T3686.2—1999
Stirring mechanism motor input power test recordTest date:
Test number:
Test location:
Impeller water (slurry) absorption:
Motor input power
First room
Second room
Measurement:
Room 3
Room 4
Table A6 Circulation volume test record
Test date:
Test number:
Impeller water (slurry) absorption:
Number of tests
Test person in charge:
Test time
Room 1
Room 2
Measurement:
Test location:
Room 3
Room 4
Room 5
Record:
Room 5
Record:
Room 6
Room 62—1999
Table A3 Filling volume test record
Fill in the test value.
→ is the coordinate of the measuring point.
Measurement:
Test date:
Test number:
Test location:
Average filling volume per unit area:
Filling uniformity coefficient:
Year, month, day
m/(min·m2)
Record:
Test prototype model:
Test prototype code:
Impeller water absorption:
First chamber
m/(min·m2)
Test person in charge:
Second chamber
Table A4 Filling volume test table|| tt||Room 3
m(min·m)
Room 4
m/(min*m)
Measurement:
Test date:
Test number:
Test location:
Room 5
m/(min·m2)
Year/month/day
Room 6
m/(min*m)
Record:
JB/T3686.2-1999
Test prototype model:
Test prototype code:
Power meter model:
Current transformer model
Number of tests
Test person in charge:
Test prototype model:
Test prototype code:
Test time
JB/T3686.2—1999
Stirring mechanism motor input power test recordTest date:
Test number:
Test location:
Impeller water (slurry) absorption:
Motor input power
First room
Second room
Measurement:
Room 3
Room 4
Table A6 Circulation volume test record
Test date:
Test number:
Impeller water (slurry) absorption:
Number of tests
Test person in charge:
Test time
Room 1
Room 2
Measurement:
Test location:
Room 3
Room 4
Room 5
Record:
Room 5
Record:
Room 6
Room 6
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