How can quartz sand and silica be distinguished?
Quartz sand is a kind of non metallic minerals, is a hard, wear-resistant, stable chemical properties of silicate minerals, its main mineral composition is silica, quartz sand, the color is white or colorless and translucent, hardness 7, quartz sand is an important industrial mineral raw material, non hazardous chemicals, widely used in glass, casting, ceramic and refractory materials, smelting, metallurgy, metallurgy, construction, chemical solvent, plastic, rubber, abrasive and other industries.
Quartz sand is a very important and widely used mineral. It is forbidden to be exported in many countries, including our countrySilicon dioxide is a compound of oxygen and silicon. It is the main component of quartz, crystal, quartz sand, ceramics, glass and so on.It's purely chemical. Neither toxic nor burning nor corrosive and not subject to controlled substances.
Their database should have a contrast picture of quartz sand, depending on whether they're serious or not.It's better if you have a relationship with the customs and then declare it as you said. The symbolic inspection of the customs will be over.Customs inspection of goods in accordance with the declaration of the document is generally instrument scanning, encountered unclear, or suspected of goods, to open the box, open package inspection. After checking the machine, but also random checks, that is, unpacking, open the luggage, open the package to view. This is random, see a few finished, and not one by one to see. Accidental circumstances. It's very busy. I've seen the machine sweep it, too.
