Doral produces a high purity silica fume during the manufacture of fused Zirconia. Silica fume is derived from the same zircon used to make fused Zirconia, and is captured from the furnace during the fusion process.
Doral's silica fume is a pure white colour due to minimal carbon levels and is called 'SF- 98' to reflect the high combined purity of silica and Zirconia. It is characterized by a particle size less than 1 micron and high specific surface area which makes it a particularly high quality product.
The major use for silica fume is in low cement castable refractories used for steel making and construction applications such as the construction of high rise buildings and bridges.