This standard specifies the method for determining the cold compression strength of industrial briquette. This standard is applicable to various industrial briquette. MT/T 748-1997 Method for determining the cold compression strength of industrial briquette MT/T748-1997 Standard download decompression password: www.bzxz.net

IC5 75- 165. 0
Registration No.: 1065--1998
Coal Industry Standard of the People's Republic of China
MT/T748—1997
Determination of cold compressive strength of industrial briquettes
Determination of cold compressive strength of industrial briquettes
Published on December 12, 1997
Implemented on July 1, 1998
wiMTT748—1957
The cold compressive strength of industrial briquettes is one of the various cold strengths of industrial briquettes and an important quality indicator of briquettes. This standard was developed by the Beijing Institute of Baking Chemistry, the Ministry of Coal Industry, the Beijing University of Mining and Technology, and the Ministry of Domestic Trade Energy Saving Technology Service Center through joint experiments. This standard is the last time it was revised: This standard is also the second standard of the Ministry of Science and Technology of Coal Industry. This standard is under the jurisdiction of the National Coal Standardization Technical Committee, and is the standard of the Ministry of Science and Technology of Coal Industry. The standard is entrusted to the Ministry of Science and Technology of Coal Industry by the Beijing Coal Chemistry Research Institute, the Beijing Mining Research Institute, and the Ministry of Energy Conservation Technical Service Center. Chen Liqiu, the first person to speak, and Huang Chengmin, the first person to speak, this standard is entrusted to the Ministry of Science and Technology of Coal Industry. 1 Scope
Carbon ore industry standard of the People's Republic of China
Determination of cald compressive strength of industrial briquette
This standard specifies the determination method of cald compressive strength of industrial briquette. This standard is applicable to various industrial briquettes.
2 Referenced standardswwW.bzxz.Net
MT/T 748—1997
The following standards contain official texts, which are quoted in this standard and become the provisions of this standard. When this standard is printed, the versions shown are all valid. All standards are subject to revision. The following new versions of the standards should be used: GH47-1996 Preparation of coal samples
CB475-1006 Preparation of coal samples 3.1 Industrial shaped coal
The coal products made of white coal are called shaped coal, and the industrial raw coal and other industrial shaped coal are called industrial shaped coal.
3.2 Cold pressure
The shaped coal is subjected to unidirectional force at a specified uniform speed on a specified testing machine under ambient temperature until it is opened. The cracking strength during cold pressing is called the rate of cold pressing.
1 Method:
A certain number of shaped coals are subjected to the force of the test machine, and the value displayed by the test machine during the cracking is recorded, and the arithmetic mean value of the measured values ​​of each shaped coal is taken as the cold strength. 5 Diameter equipment
5.1 Test conditions:
Can apply force at a speed of sn~m
The contact surface of the shaped coal is not affected by the force
c) Maximum range: 2. 5 kN--5 k>
Small difference 10
) Can accurately display the force that the shaped coal bears when it is opened. Ministry of Coal Industry of the People's Republic of China approved on December 12, 1997, implemented on July 1, 1998
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MI/T 748
with reverse forming machine, and equipped with white moving equipment, the temperature is maintained at (105 above 5℃. 5.3, the total sample is 5km5g
6. The total sample is taken
61. The briquette produced in each shift is a mining unit, and the actual daily shipping volume is used as the deep sampling unit. The sample mine is to be dried and the briquette is transported through the lower part, and the top of the conveyor or the finished product pile is read. The "GB475\product coal sampling method" is determined. The mass of each sub-sample is (2~3) kg. 6.2 Trial division:
The collected briquette sample room is rectangular, divided into two rows of small squares of equal size, and then collected and discarded alternately. The shrinkage is carried out in a shrinking manner, and the mass of the sample is about 4kg (as shown in Figure 1). Figure 10 shows the exact mass of the sample. Note: There should be at least 63 complete samples, especially those with cracks and basic cracks. The remaining samples should be fixed step by step. 7.1 Determination of the integrity and average weight of the test: Weigh the mass of the test rod (accurate to 5g), and then select the basically intact samples from them. Weigh their mass (accurate to 5g): Calculate the percentage of the integrity of the sample in the total sample mass, and calculate the average mass of the basic intact sample. 7.2 Sample extraction: Spread out or lengthen the invalid, basically intact, and air-dried samples. Strip, and then divide it into 15 small pieces with equal surface and root. Take out one mold from each small strip - a total of 13 molds for one measurement. If so, take out 15 more molds for another measurement. 7.3 Finish.
Use the new machine to connect the mold to the center position of the mold (51) and open the mold vertically on the short axis force surface. Start the test machine and apply force at a uniform displacement of (1-15) mm/min. 7.4 Record the force that the single mold is subjected to and the value when the test machine stops for the first time or reaches the first end. The cold strength of a group of 10 briquettes is measured by the above steps. 8 Conclusion 81 Result calculation: The arithmetic mean of two values ​​of 10 shaped coals is taken as the group measurement value, and the average value of the group is rounded to an integer as the final result, which is expressed as SCC, with the unit of \N/piece\. 8.2 Test report: The test report should include the following contents: a) The test results of the test station: b) The test results of the test station: a) The test results of the test station: b) The test results of the test station: c) The test results of the test station: c) The test results of the test station: d ...
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