Drywall sanding produces vast amounts of dust. Most dusts are flammable and explosive at the right PPM.Click to see full answer. Also, can salt dust explode?The dust also must be combustible. Some dusts, such as quartz sand or table salt no matter how finely ground will not burn because they are not combustible. Many metal powders will burn and could form explosive mixtures if suspended in air.Furthermore, what causes dust to explode? Dust explosions occur when combustible dusts build up in the air and combust rapidly, causing a strong pressure wave to form. They are a deadly hazard in a variety of workplaces, from grain silos to plastics factories. A combustible dust at the right concentration level. Oxygen. Also asked, how do you get drywall dust? Step 1 – Sheeting. Before doing any type of drywall sanding, you should always put on a dust mask and safety goggles. Step 2 – Wet Sanding. One way to eliminate drywall dust is to use the technique known as wet sanding. Step 3 – Wet/Dry Vac. Step 4 – Drywall Vacuum Sander. What size is drywall dust?First, drywall dust is very fine – about 10 microns, or micrometers, in diameter. To give you an idea of how small that is, the diameter of the average human hair is about 75 microns. Drywall dust particles are extremely small and can easily travel through the airways.