Manufacturing process: Take high iron and high calcium sand as the main raw material, add a certain amount of binder, and mix and press.

Main purpose: used in the bottom of AC and DC electric arc furnace.

Construction method: The construction method is very simple. Cover the bottom with 100-150mm thick ramming material. After vibrating compaction, cover the surface scraps with another layer, etc. After the bottom is installed, cover a thin steel plate to avoid loading scrap steel or Damage the surface when molten iron.