Can titanium, barium sulfate, calcium carbonate, wollastonite powder and talcum powder be transported by ordinary vehicles?
Occupational protection is recommended from the above quality, grade, comfort, economy to assess, choose a good mask to prevent pneumoconiosis.At present, China has KN100 grade products, and the use of comprehensive costs of about one yuan per day.
Therefore, masks must be divided into size, size, masks and facial leakage rate varies from person to person.The dust of the road: scientific selection of certified GB2626-2006 standard anti-dust masks, contribute to the prevention of lung injury.1, choose double mask type. Disposable respirators are not suitable for long-term or occupational protection due to high leak rate.2, select the KN100 level. High dust environment, low protection rate will lead to physical damage.3, choose silicone mask, the service life is relatively long, soft and comfortable. Wear for a long time, it is not easy to cause allergic reactions. A mask with a high hardness can easily cause a facial impression.4, mask size, this is extremely important. It is not recommended to buy so-called universal models of masks that are prone to leakage.5, mask covered with nose and mouth, covering the mouth and nose and jaw 2 kinds, it is recommended to use the latter, relatively comfortable.6, it is recommended to choose breathing smooth mask. Some masks use double filter cotton + double filter surface design, relatively smooth breathing, and long service life.
The dust of the road: now anti-dust masks must implement the GB2626-2006 standard. Dust masks are divided into three grades: KN100, KN95 and KN90. Among them, KN100 can reach nearly 100% (99.97% of above) dust protection effect. For large particles, the KN95 grade can be used. The protection effect depends on 2 aspects. One is the filtration efficiency of filter cotton. The two is the leakage rate of the mask and face.
