Difference between free silica and silicon dioxide
Silica (chemical formula: SiO2) is an acidic oxide hydrate, corresponding silicate (H2SiO3). Silicon dioxide is the most important compound of silicon. The natural silica present on the earth accounts for about 12% of the earth's crust quality. There are two major forms of crystalline silica, amorphous and amorphous.
In the determination of general ore composition:Silica refers to total silicon content, while free silica refers to the content of quartz.That is to say, the total silicon content includes not only the amount of free silica, but also some silicon content in some other silicon minerals, such as tourmaline, beryl, opal and so on.Therefore, the difference between the two components of the ore is very large, and it depends on whether the silica in the ore exists mainly in the form of free silica.Welcome to exchange messages.
A free silica in rocks or minerals that is not bound to a metal or a metallic compound. Free silica can be divided into three types: crystalline, amorphous and amorphous according to their crystal structure.