Silica Fume ia also called
Micro silica, it is a very fine pozzolanic material, composed of
amorphous silica produced by electric arc furnaces as a by-product
of the production of elemental silicon or ferro silicon alloys.
This micro silica used in refractory has a minimum of *4% content
of silica, the average content of SiO2 is around *6%. And this
undensified micro silica reaches national first 5 maximum of
0.3 um.
