| 摘要 |
<p>PURPOSE:To produce metallic Mg at a low cost by heating and reducing the compounded material of dolomite clinker and CaC2 in a vacuum, recovering Mg vapor, and recycling the CaC2 produced from the residue. CONSTITUTION:CaC2 is compounded as a reducing agent with dolomite clinker, and the compounded material is heated and reduced in a vacuum in a reducing furnace, then metallic Mg is separated and recovered as a gaseous phase. On the other hand, a carbon material is compounded with a part of the residue in the reducing furnace contg. CaO and carbon and the residue is subjected to arc heating in a carbide furnace, by which CaC2 is produced. The CaC2 is recycled as the reducing agent for said dolomite clinker. The remaining part of the residue of the reducing furnace is charged, if necessary, into a combustion furnace to burn the carbon-contg. material in the residue, thereby making the residue consisting essentially of CaO. Iron oxide is compounded with such residue and the residue is melted in a melting furnace, by which calcium ferrite is produced.</p> |
