The difference between dust blowing and sand blowing in sand dust test chamber

First, sand dust test box blowing sand: sand particles should be quartz crystal with sub-angular structure, the average roundness factor is 0.2, Mohs hardness is 7. It has a silica content of 95% or more by mass and consists of the following dimensions:
1, 0.5% to 1.5% pass through the screen with a pore size of 850um 2, 1.2% to 2.2% pass through the screen with a pore size of 600um 3, 13.8% to 15.8% pass through the screen with a pore size of 425um 4, 36% ~ 38% pass through the screen with a pore size of 300um, 5, 27.6% to 29.6% pass through the screen with a pore size of 212um, 6.11.7% to 13.7% pass through the screen with a pore size of 150um, 7.4.2% to 6.2% pass the aperture For 150um screen 2, sand dust test box dust: dust particles are angular silica powder, its mass content is 97% ~ 99% by mass, composed of the following dimensions:
1. 100% pass through a screen with a pore size of 150um, 2, 96% to 100% pass through a screen with a pore size of 106um, 3, 88% to 92% pass through a screen with a pore size of 75um, 4, 73% to 77% pass Screen with a hole diameter of 45um

Chalk With Black Frame

WENYANG STATIONERY MANUFACTURING CO.,LTD. , https://www.marvelousboard.com

Posted on