This standard specifies the material sources, basic physical properties, packaging, storage and use conditions of two types of coal fly ash test dust. The two types of coal fly ash test dust specified in this standard are suitable for dust removal performance test and product quality inspection of dust collectors. GB/T 13269-1991 Standard sample of atmospheric test dust coal fly ash GB/T13269-1991 Standard download decompression password: www.bzxz.net
This standard specifies the material sources, basic physical properties, packaging, storage and use conditions of two types of coal fly ash test dust. The two types of coal fly ash test dust specified in this standard are suitable for dust removal performance test and product quality inspection of dust collectors.

National Standard of the People's Republic of China
Atmospheric air-Test dust standard sample -Fly ash
1 Subject content and scope of application
CB 13269-91
1.1 This standard specifies the material sources, basic physical properties, packaging, storage and use conditions of two types of coal fly ash test dust. 1.2 The two types of coal fly ash test dust specified in this standard are suitable for dust removal performance test and product quality inspection of dust collector. 2 Reference standards
GB 176 Chemical analysis methods for cement
GB5161 Determination of effective density of metal powders by body penetration method G136524 Determination of particle size distribution of metal powders by light penetration method 3 Terms, symbols, definitions
3.1 Particle size dp----refers to the Stokes equivalent diameter of dust particles measured by liquid sedimentation method, expressed in μm, 3.2 Particle size distribution--refers to the proportion of dust components in each particle size classification interval. This standard refers to the mass percentage relationship, and the total (i.e. the sum of each component) is 100%,
3.3 Sieve rate R (%) refers to the percentage of the cumulative mass of the particles larger than a certain particle size d to the total mass of dust. 3.4 Undersize rate D (%)--refers to the percentage of the cumulative mass of the particles smaller than the base particle size d to the total mass of dust. R and D are complementary, i.e. R+D=100%).
3.5 Median diameter 50 refers to the particle size corresponding to the position where the screen rate R and the screen rate P are both 50%, expressed in μ. 3.6 Point density β refers to the ratio of the dust mass after the gas inside and between the dust particles is removed to the actual volume it occupies, expressed in g/cm.
4 Technical requirements
4.1 Raw materials and their main chemical composition
4.1.1 The raw material is coal fly ash. bzxz.net
4.1.2 The chemical composition of coal fly ash is determined according to the method specified in GB176, and its main chemical composition meets the numerical specifications specified in Table 1. Table 1 Main chemical composition of coal fly ash Chemical composition 4.2 True density and particle size distribution 45. 10--52.32 Approved by the State Environmental Protection Agency on May 1, 1991 A 24.43~34.47 7. 55~10. 87 3. 90~-5. 28 Implemented on August 1, 1992 4.2.1 True density CB 13269-91 True density is determined by the liquid penetration method specified in GB5161. The value should be: True density of coal fly ash 1 p = 2. 3 ± 0. 2 (g/cm2) True density of coal fly ash 2 e = 2.5 ± 0. 1(g/cm\) 4.2.2 Particle size distribution
According to GB6524 or similar standards, the particle size distribution of dust shall be determined by liquid sedimentation method, with Stokes equivalent diameter as the measurement unit. The particle size distribution of the two types of coal fly ash shall comply with the numerical ranges in Table 2 and Table 3. Table 2 Particle size distribution of coal fly ash 1
Particle size limit d
Sieve rate R+%
Particle size limit d
Sieve rate R,%
5 Inspection method
Particle size distribution of coal fly ash 2
5.1According to GB6524 or similar standards, the particle size distribution of dust shall be inspected by the exciter sedimentation method. 5.2Inspect the chemical composition of dust according to the method specified in GB176, 5.3Inspect the true density of dust according to the liquid penetration method specified in GB 5161. 6 Packaging marking method
17—3
Median diameter p50
12.7±1.0
Median diameter 450
7. 5—1. 0
6.1 The two types of coal fly ash are packaged in two specifications: 4kg/barrel and 808/bottle, and should be accompanied by the certification mark issued by the state and the main technical indicators provided by the supervision unit.
6.2 Marking method of fly ash 1
Fly ash (Fly ash)
Standard sample number GSB250023—91
Main technical indicators
P=2.3±0.2(g/cm)
dp50=12.7±1-0(um)
6.3 Marking method of fly ash 2
Fly ash (Fly ash)
Standard sample number GSBZ 50024—91
Main technical indicators
p -2.5±0. 1 (g/cm*)
dp 50=7. 5±1.0 (μm)
7 Storage and use cases
Fly ash should be stored in a sealed container at room temperature with a validity period of 1. 5 Before use, take out the amount to be used and dry it at 105-120℃ for 12 hours, then keep it dry and store it. Take it out when you need it. Additional remarks:
This standard is proposed by the Science and Technology Standard Division of the State Environmental Protection Administration. GB13269-91
This standard is drafted by the Environmental Protection Research Institute of the General Research Institute of Building Research of the Ministry of Metallurgy. The main drafter of this standard is Liu Keqin.
This standard is interpreted by the State Environmental Protection Administration.
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