本研究針對鉬鐵爐碴中鉬資源再生建立一套回收系統，鉬鐵爐碴中含有1.85wt%的氧化鉬含量，極具有回收再利用之價值，採提煉冶金資源化技術，其內容可分為焙燒預處理、浸漬、純化與分離、金屬化合物採取。
鉬鐵爐碴是一種由鉬、矽、鐵、鋁、鈣、鎂、鈉和鉀等金屬氧化物組成的氧化碴，經氫氧化鈉鹼焙燒，可將鉬、矽和鋁等氧化物會轉化為易溶於水的鈉鹽類，在鹼礦比4(g/g)、焙燒溫度600℃、焙燒2小時的操作條件下，鉬鐵爐碴中鉬氧化物優先轉化為鉬酸鈉鹽，鉬轉化率達98%；在浸漬階段，以水浸漬可選擇性使鉬溶出率達99.5%以上，並將鐵、鈣、鎂等不溶於水之雜質金屬留於渣相中。
溶媒萃取法分離鉬與其他雜質金屬，選用胺類萃取劑TOA(trioctylamine)、改質劑TBP(Tributyl phosphate)溶於煤油，在萃取階段以TOA濃度為0.1M、TBP/TOA=3、水油比=5、震盪時間10分鐘、萃取平衡酸鹼度=2.8的操作條件下，鉬有最佳萃取效率達99.5%；反萃取階段，以氨水濃度2M、油水比=2、震盪時間10分鐘，鉬反萃率達99.5%。反萃水相中雜質含量極低，加入硝酸使鉬酸銨沉澱，低溫結晶蒸發得鉬酸銨晶體，再經400℃鍛燒得純度99%以上的三氧化鉬。鉬鐵爐碴鉬資源化之總體回收率約97%。

Upon the development of industry, the exploitation of molybdenum will be exhausted soon than later. Ferro-molybdenum is an additive in producing HSLA. The procedure of manufacturing Fe-Mo would generated Fe-Mo slag which was consist with 1.85 wt% MoO3. This study described a metallurgical route for recovering Mo from Fe-Mo slag using NaOH molten salt roasting, water leaching, amine solvent extraction and preparation of MoO3 process was investigated. Through NaOH molten salt roasting process, MoO3 was converted to Na-type structure in priority which was leached easily by water and left unconverted impurities in solid phase. Mo (VI) formed cationic, neutral and anionic structures because of different from pH, so it was important to control suitable pH equilibrium to achieve optimal Mo extraction efficiency. Solvent extraction choosing amine extractant TOA and stripping using ammonia could concentrate plenty of Mo to produce Mo metallic compound like ammonium molybdate and molybdenum oxide. Overall, the total Mo recovery efficiency from Fe-Mo slag was about 97%.

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