HG/T 2223-1991 Determination of particle size of granular triple superphosphate HG/T2223-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG2223-91
Determination of the particle size of granular heavy superphosphate
Issued on November 15, 1991
Ministry of Chemical Industry of the People's Republic of China
Implementation on July 1, 1992
W Chemical Industry Standard of the People's Republic of China
Determination of the particle size of granular heavy superphosphatebzxz.net
1 Subject content and scope of application
This standard specifies the determination of the particle size of granular heavy superphosphate by sieving method. This standard is applicable to the determination of the particle size of granular heavy superphosphate. 2 Reference standards
GB6003
Test sieve
3 Summary of method
Use sieving method to separate granular heavy superphosphate into different particle sizes, weigh and calculate their percentages. 4 Instruments
Usually laboratory instruments and
HG2223-91
4.1 Test sieve: sieve hole size 1.0, 2.0, 2.8 and 4.0mm, with sieve cover and bottom plate, in accordance with the R40/3 series regulations in GB6003; 4.2 Vibrating sieve machine: can vibrate vertically and horizontally. 5 Operating steps
Stack the test sieves with sieve cover and bottom plate in order according to the sieve hole size. Weigh 200g of the reduced sample (accurate to 0.5g), place it on the 4.0mm sieve, cover the sieve cover, place it on the vibrating sieve machine, clamp it, and vibrate it for 5 minutes. Weigh the sample that does not pass through the 4.0mm sieve hole and the sample in the bottom plate, and the particles clamped in the sieve hole are measured as the part that does not pass through the sieve hole. Keep the fertilizer particles between 2.0 and 2.8mm for the determination of the average compressive strength of the particles.
Note: If there is no vibrating screen, manual screening can be used. 6 Result Expression
The content X of granular fertilizer with 1.0~4.0mm expressed as mass percentage is calculated as follows: mo-m1x100
Wherein: m1——the sum of the mass of the sample that does not pass through the 4.0mm sieve hole and the sample in the bottom plate, g, mo
——the mass of the sample, g.
The result should be expressed to one decimal place.
Approved by the Ministry of Chemical Industry of the People's Republic of China on November 15, 1991 and implemented on July 1, 1992
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Additional Notes:
HG 2223-91
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Shanghai Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by the Shanghai Chemical Industry Research Institute of the Ministry of Chemical Industry and Yunnan Phosphate Fertilizer Factory. The main drafters of this standard are Yin Yongkang, Chen Xuezhi and Xie Ruiming.
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