Dust test box test dust classification

The types of dust used in the sand dust test box can be divided into: dry talcum powder, Portland cement, smoked ash and so on. The type of dust used in the test can be subdivided into:

Class A dust: consists of 97% inorganic minerals and 3% cotton fibers by mass.

Minerals should contain 65% to 70% SiO 2 and the rest are natural impurities.

The particle size distribution by mass is:

5μm or less: ≥39%;

5 to 10 μm: <18%;

10 to 20 μm: <16%;

20 to 40 μm: <18%;

40 to 80 μm: <9%.

Cotton fibers should contain small amounts of fine impurities from the shell of the cotton. The length after grinding is generally not more than 10mm.

Class B dust: consists of 100% inorganic minerals by mass.

Minerals should contain: by mass:

SiO2: 34% to 40%;

Fe2O3: 17% to 23%;

Al2O3: 26% to 32%.

The rest are natural impurities.

The particle size distribution by mass is:

10μm or less: about 68%;

10 to 20 μm: about 12%;

20 to 50 μm: about 14%;

50 to 100 μm: about 6%;

Beijing Yashilin Testing Equipment Co., Ltd. Technical Information

砂尘试验箱试验用尘等级分类

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Note: The technical specifications herein are for reference only. We remain the rights to upgrade without prior notice.

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