| 摘要 |
PURPOSE:To produce high-quality rock wool, etc., having improved durability in good productivity, by using the titled spinner wheel wherein at least the circumferential surface of cylindrical or conic hollow material made of metal is covered with a specific flame spray coating layer. CONSTITUTION:For example, at least a circumferential surface 4 of a cylindrical or conic, metallic hollow material made of carbon steel, etc., is covered with a flame spray coating layer of a metal having both heat resistance and corrosion resistance such as stainless steel, a blend of it and SiC, etc., stabilized zirconia, etc., cermet or ceramic having >=0.1mm thickness by flame spray method to give the titled spinner wheels 3. The two wheels 3 are equipped with horizontally rotary shafts in parallel to the rotary direction in such a way that the distance between both circumferential surfaces 4 is about 10mm and cooled by cooling water through a refrigerant circulating pipes 7. On the other hand, melt 2 of inorganic composition melted by an electric furnace 1 is fed through a trough 5 to the circumferential surfaces 4 of the wheels 3 rotating at high speed and projected on high-speed air flow jetted from a high-speed air flow feed opening 6 to obtain rock wool, slug wool, etc. |
