GB/T 20451-2006 Activated carbon ball method strength test method
GB/T 12496.6-1999 Determination of strength of wood activated carbon test method
GB/T 7702.3-1997 Test method for coal granular activated carbon - Determination of strength
national standards of People's Republic of China
Coal quality granular activated carbon test method GB/T7702.3-1997
Determination of strength instead of GB/T7702.3-87
Standard test method for granular activated carbon from coal
—Determination of hardness
1 Scope
This standard specifies the instruments required for the determination of the strength of coal-based granular activated carbon, the measurement steps and the treatment of the measurement results.
This standard applies to the determination of the strength of coal granular activated carbon (hereinafter referred to as activated carbon).
2 Reference standard
The tracings contained in the following standards constitute provisions of this standard by reference in this standard. At the time of publication of this standard, the editions indicated are valid and all standards are subject to revision. The use of this standard and parties should explore the possibility of using the latest edition of the following standards.
GB/T7702-1997 coal granular activated carbon test method, determination of moisture.
3 method summary
The sample is subjected to a combined rotation and striking movement in a special tray containing a certain number of stainless steel balls, and the activated carbon skeleton and the surface layer are simultaneously damaged during the movement. The change in the particle size of the activated carbon was measured, and the percentage of the sample occupied by the portion of the particles remaining on the strength test sieve was used as the strength of the sample.
4 instruments, devices
4.1 Vibration machine: speed 280~320r/min;
Tap 140~160 beats/min.
4.2 Test sieve: Φ200×50/××.×× square hole GB6003-85.
The strength test sieve and the particle size test bottom sieve diameter corresponding table are shown in Table 1.
Table 1 Strength test sieve and particle size test bottom sieve diameter corresponding selection table mm
Particle size test bottom sieve 5.60, 5.00, 4.0, 3.15, 2.50, 1.00, 0.800, 0.710, 0.500, 0.400, 0.355, 0.250, 0.200, 0.180
Strength test sieve 2.80, 2.50, 2.00, 1.60, 1.25, 0.500, 0.400, 0.355, 0.250, 0.200, 0.180, 0.125, 0.100, 0.090
4.3 Strength test disc: Material aluminum bronze ZQAL9-4 or ZHMn58-2; dimensions are shown in Figure 1.
4.4 Timer (or stopwatch): Accuracy is ±5S.
4.5 Steel balls: d = 12.7 mm ± 0.1 mm, 15; d = 9.5 mm ± 0.1 mm, 15.
See Figure 1 Strength Test Disk
4.6 Balance: The sensitivity is 0.1g.
4.7 Brush.
4.8 Electric constant temperature drying oven: 0~300 °C.
4.9 Measuring cylinder.
5 sample and its preparation
The sample was taken out by a quarter method for the sample to be sent.
6 Determination steps
6.1 Take 200ml sample into the electric oven and dry it in the oven at (150±5) °C for 2h. The water content is less than 1% without drying.
6.2 On the vibrating screen, the bottom screen used to determine the particle size of the product was screened for 60 s to remove dust.
6.3 The measuring cylinder takes 100ml of the selected sample and weighs it on the balance to the nearest 0.1g.
6.4 Pour the weighed sample into the strength test tray and add the steel ball.
6.5 Fix the strength test disc to the vibrating screen.
6.6 Start the vibrating screen machine, start the timer (or stopwatch) at the same time, and shake the screen for 30min.
6.7 Stop the vibrating screen and remove the steel ball from the strength test disc.
6.8 Place the required strength test sieve (see Table 1) on the shaker chassis, transfer the specimen from the strength test disc into the sieve, and fix it to the shaker.
6.9 Start the vibrating screen and start the timer at the same time.
6.10 At the end of the vibrating screen, the remaining sample in the strength test sieve is poured into a porcelain plate for weighing, accurate to 0.1 g.
6.11 Pour the sample in the shaker chassis into another porcelain plate and weigh it to the nearest 0.1g.
6.12 Repeat steps 6.1 to 6.11 to make another sample.
7 Processing of measurement results
7.1 The strength mass fraction is calculated according to formula (1):
M2
H(%)= ×100...........................(1)
M1
Where: H - strength mass fraction, %;
M2—the mass of the remaining sample in the strength test sieve, g;
M1—the mass of the original sample, g.
7.2 Test accuracy test:
The test results satisfy the requirements of formula (2) and the test is effective.
0.98 m1 ≤ (m2+ m3) ≤ 1.02 m1..............................(2)
Where: m1—the same formula (1);
M2—the same formula (1);
M3—the mass of the sample in the chassis after the test, g.
7.3 Each sample is measured once and the results are expressed as an arithmetic mean, accurate to the percentile.
8 test report
Performed in accordance with the provisions of Chapter 7 of GB/T7702.1-1997.
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