FOERFARANDE FOER FRAMSTAELLNING AV EN MELLANPRODUKT FOER PRODUKTION AV KISEL OCH/ELLER KISELKARBID

摘要

A method of preparing an intermediate composition for the production of silicon or silicon carbide, wherein silicon dioxide particles (quartz sand) are coated with carbonaceous material in a fluidized bed from which the coated particles are extracted as they fall to the bottom of the fluidized bed by virtue of an increase in mass by the coating process. The carbon in the coating should be stoichiometrically equivalent to that required for the ultimate reaction of the silicon dioxide to form either elemental silicon or silicon carbide.