This standard specifies the method for determining the bulk density of coal in a small container. This standard applies to lignite, bituminous coal and anthracite with a particle size of less than 150 mm. MT/T 739-1997 Method for determining the bulk density of coal in a small container MT/T739-1997 Standard download decompression password: www.bzxz.net

ICS.73.040
Record number: 1059—1998
Coal Industry Standard of the People's Republic of ChinawwW.bzxz.Net
MT/T739-1997
Determination of the bulk density of coal in a small container
Published on December 12, 1997
Ministry of Coal Industry of the People's Republic of China
Implemented on July 1, 1998
MT/T739—1997
Determination of the bulk density of coal in a small container There is no standard at home and abroad at present. This standard is equivalent to ISO567:1974 "Determination of the bulk density of coke in a small container".
This standard specifies the instrumentation, test steps, result calculation and expression methods for the determination of the bulk density of coal in a small container. Its purpose is to unify and standardize the determination method of the bulk density of coal, which is conducive to the design of coal storage and transportation and coal processing and conversion technology. This standard is formulated for the first time. This standard is proposed by the Science and Technology Education Department of the Ministry of Coal Industry. This standard is under the jurisdiction of the National Coal Standardization Technical Committee. The drafting unit of this standard is the Xi'an Branch of the China Coal Research Institute. The main drafters of this standard are Zhang Cairong and Zhang Hui. This standard is interpreted by the Xi'an Branch of the China Coal Research Institute. 1 Scope
Coal Industry Standard of the People's Republic of China
Determination of the bulk density of coal in a small container
Determination of the bulk density of coal in a small container
This standard specifies the determination method of the bulk density of coal in a small container. This standard is applicable to lignite, bituminous coal and anthracite with a particle size of less than 150mm. 2 Referenced Standards
MT/T739-1997
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/T211—1996 Determination of total moisture in coal GB475-—1996 Commercial coal sampling method 3 Method summary
Carefully put the coal sample into a container of known mass and volume, weigh it, and calculate the bulk density. 4 Equipment
4.1 Container: A cubic container with a volume of 200L (0.200m3) and an inner side length of 585mm. The structure is solid and the inner surface is smooth. 4.2 Scale: The maximum range is 500kg, and the weighing accuracy is greater than or equal to 0.1%. 5 Coal sample
The coal sample should be representative and have sufficient quantity to ensure repeated measurements. 6 Determination steps
Weigh the container (4.1) with a platform scale (4.2) to the nearest 0.5kg: Carefully place the coal sample in the container with a shovel. The coal sample should fall as low as possible and should not exceed 0.6m at most. The coal sample should be placed about 100mm above the top of the container. Remove the coal sample that is above the container with a hard straight plate so that the surface of the coal sample is flush with the top of the container. Weigh the container containing the coal sample. Repeat the above steps with another part of the coal sample. Take commercial coal samples according to GB475 and determine the total moisture according to GB/T211. 7 Calculation and expression of results
Bulk density is calculated according to formula (1) and (2):
Ds,ar
Approved by the Ministry of Coal Industry of the People's Republic of China on December 12, 1997 mi-mo
(1)
Implemented on July 1, 1998
MT/T739-1997
Da = m=mo ×
Where: D..r--bulk density of coal on as-received basis, t/m; D..d----bulk density of coal on dry basis, t/m; mi--mass of container containing coal sample, kg; mo-mass of container, kg;
V-volume of container, L;
M-total moisture content of coal sample, %.
The arithmetic mean of repeated measurements is rounded to two decimal places as the final result. The report should indicate the measurement location, coal particle size and coal type. 8
Precision
Repeatability 0.03t/m2.
（2）
Coal
Industry Standard of the People's Republic of China
Method for determination of bulk density of coal in small container
MT/T739—1997
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68522112
Printed by Qinhuangdao Printing Factory of China Standards Press Distributed by Xinhua Bookstore in Beijing; sold by Xinhua Bookstores in all regions; copyright reserved; no reproduction allowed
Format: 880×1230
First edition in July 1998
Printing sheet: 1/2
Number of words: 4,000
First printing in July 1998
Print run: 1-1500
Book number: 155066·2-12277; List price: RMB 6.00*
Headings: 341-45
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