This standard specifies the principle, instrumentation, test procedures, test result calculation and precision of the determination of volatile matter of carbon materials. This standard is applicable to the determination of volatile matter of carbon materials such as calcined coke, calcined coal, needle coke, graphite products, roasted products and carbon paste in carbon products. YB/T 5189-2000 Determination of volatile matter of carbon materials YB/T5189-2000 Standard download decompression password: www.bzxz.net

YB/T 5189—2000
This standard is revised on the basis of YB/T5189—1993 "Determination of volatile matter in carbon paste" to meet the requirements of low volatile matter carbon material testing.
This standard includes the determination method of high volatile matter in carbon paste and the determination method of low volatile matter in other carbon materials. The following major technical contents have been modified in this revision of this standard: the scope of application has been adjusted;
- The specifications of the crucible have been adjusted;
The particle size of the sample has been adjusted;
The operating steps have been adjusted.
This standard replaces YB/T5189—1993 from the date of implementation. This standard is proposed and managed by the Metallurgical Industry Information Standards Research Institute. The drafting unit of this standard: Jilin Carbon Group Co., Ltd. The main drafters of this standard: Meng Xiangli, Kang Jian, Zhu Jie. This standard was first issued in December 1993.
Ferrous Metallurgy Industry Standard of the People's Republic of China Determination of Volatile Matter Content in Carbon Material
The determination of volatile matter content in carbon material1 Scope
YB/T 5189—2000
Replaces YB/T5189—1993
This standard specifies the principle, instrumentation, test procedures, test result calculation and precision of the determination of volatile matter content in carbon material. This standard is applicable to the determination of volatile matter content in carbon materials such as burnt coke, satin-burned coal, needle coke, graphite products, roasted products and carbon paste in carbon products.
2 Cited 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 are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1427-1988 Sampling method for carbon materials GB/T 1997—19891
Taking and preparing coke samples
YB/T1428--19972
Determination of intrinsic moisture in carbon materials
YB/T 5189--1993zbzxZ.net
Determination of volatile matter in carbon paste
GB/T8170-1987 Rules for numerical rounding
3 Principle
In the case of air isolation, a quantitative sample is heated at a specified temperature and time, and the volatile matter is calculated according to the difference between the total mass loss and the evaporation water loss. 4 Instruments and equipment
4.1 High temperature furnace: with automatic temperature controller, can maintain a constant temperature of (900±20)℃, and can ensure that it is reheated to (900±20)℃ within 3min after being cooled. The furnace door should have a small hole for volatiles to escape. The hot junction of the thermocouple should be in the constant temperature zone of the furnace, 10 mm to 20 mm away from the furnace bottom.
4.2 Medium-sized porcelain for carbon paste: volume 25mL, with lid, upper outer diameter 38mm to 39mm, lower outer diameter 22mm to 25mm, height 37mm to 38mm, mass 14g to 16g.
4.3 Double-lid porcelain crucible for other types: the double-layer ground glass lid should be tightly combined, the upper outer diameter is 30mm, the middle outer diameter is 26.3mm, the lower outer diameter is 20.5mm, and the height is 44mm. For detailed specifications, see Figure 14.4 Analytical balance: sensitivity is 0.0001g. 4.5 Dryer: with desiccant (color-changing silica gel) inside. 4.6 Rack: Made of heat-resistant metal wire, the bottom of the crucible placed on the rack should be 10mm to 20mm away from the bottom of the furnace. 4.7 Crucible tongs.
4.8 Stopwatch.
Approved by the State Metallurgical Industry Bureau on 2000-07-26, implemented on 2000-12-01
5 Sample
Ring thickness 2.3
YB/T5189—2000
Figure 1 Double-cover porcelain glass
Wall thickness 1.5
5.1 Samples are collected according to the type of sample: carbon paste, graphite products, and roasted products are carried out in accordance with GB/T1427, and other types of stacked or bagged samples are carried out in accordance with GB/T1997.
5.2 Carbon paste samples: Crush all samples with a mass of not less than 1 kg to less than 4 mm, reduce them to about 60 g by quartering, and grind them to pass through a 0.5 mm standard sieve (if the water content is too high, air drying should be used). 5.3 Other samples: Dry all samples with a mass of not less than 1 kg at (150 ± 5) ℃ for 1 hour, crush them to less than 4 mm, reduce them to about 60 g by quartering, and grind them to pass through a 0.25 mm standard sieve. 6 Test steps
6.1 Carefully mix the prepared samples and weigh 2 g of the sample (3 g for carbon paste samples) to an accuracy of 0.0001 g. Put it into a double-covered porcelain crucible (a medium-sized porcelain crucible for carbon paste samples) that has been pre-calcined at (900 ± 20) ℃ to a constant mass and weighed. Gently tap the crucible to flatten the sample, cover the crucible, and place it on the crucible stand. 6.2 Quickly place the rack with the crucible into the constant temperature zone of the (900±20)℃ high temperature furnace, start the stopwatch at the same time, quickly close the furnace door, and heat for 7 minutes. Make sure that the furnace temperature returns to (900±20)℃ within 3 minutes after being placed in the furnace, otherwise the test will be invalid. 6.3 Immediately take it out of the furnace after heating for 7 minutes, cool it in the air for about 5 minutes, then move it into a dryer to cool it to room temperature and weigh it. 6.4 While testing, determine and analyze the moisture content according to the provisions of YB/T1428. 7 Test results
The volatile content V of the sample is calculated according to formula (1): V(%) me=m × 100 W
Wherein: V—
-The volatile content percentage of the sample, %;
-The mass of the crucible and the sample before calcination, g,
m3The mass of the crucible and the sample after calcination, g,
WThe analyzed moisture content of the sample, %.
YB/T5189—2000
The result is the arithmetic mean of two tests. The test result is rounded to two decimal places (the numerical value is rounded according to the provisions of GB/T8170). 8 Precision
Carbon paste samples
Other samples
9 Test report
The test report should include the following:
a) Commissioning unit;
b) Sample name and number;
c) Average value of test results;
d) Test unit;
e) Test personnel;
f) Test date.
Repeatability
Not more than 0.6%
Not more than 0.05%
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