| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing ferromolybdenum which produces ferromolybdenum from molybdenum-containing waste acid with high efficiency at a low cost, and to provide ferromolybdenum produced by using the production method. SOLUTION: The method comprises: a multiple oxide production stage (S1) where a CaO feeding substance is added to waste acid so as to produce a multiple oxide; a multiple oxide pulverization stage (S2) where the multiple oxide is pulverized; a mixing stage (S3) where an iron oxide feeding substance, a carbonaceous reducing agent and an Al<SB>2</SB>O<SB>3</SB>feeding substance are added to the pulverized multiple oxide, and mixing is performed; a melting stage (S4) where the resultant mixture is heated under the conditions where the final arrival temperature is 1,450 to 1,550°C so as to form a melt; and a ferromolybdenum separation stage (S5) where ferromolybdenum is separated from the slag produced by cooling the melt, and the ratio of CaO to Al<SB>2</SB>O<SB>3</SB>in the mixture, (CaO/Al<SB>2</SB>O<SB>3</SB>) is 0.81 to 1.22 by mass ratio. COPYRIGHT: (C)2010,JPO&INPIT
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