WHAT IS THE MICROSILICA?
Silicon powder is a mineral composed of ultrafine, amorphous glassy spheres of Silicon Dioxide (SiO2). Microsilicais a byproduct of producing Silicon metal or Ferrosilicon alloys. The individual particles are extremely small, approximately 1/100th the size of an average cement grain.Silicon metal and alloys are produced in electric furnaces. The raw materials are quartz, coal, and woodchips. The Microsilica is formed when SiO2 gas. given off as the quartz reduces, mixes with oxygen in the upper parts of the furnace. Here the SiO2 is oxidised to SIO2. condensing into the pure spherical particles of microsilica that form the major part of the smoke or fume from the furnace.
The fumes from the furnace are drawn through cooling pipes, through a pre-collector and cyclone to remove coarse particles that may have been carried over from the furnace-and then blown into specially designed baghouse filters where it is colloected.The quality of the raw materials and the operation of the furnaces determine the purity of the Although the material is collected as a very fine powder with a bulk density in the of 200kg/m1, silicon powder can be processed to density it, making the B/D around 250-700kg/m³.