タングステン鉱石の高圧分解抽出

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書誌事項

タイトル別名
  • Autoclave Extraction of Tungsten Ore
  • タングステン コウセキ ノ コウアツ ブンカイ チュウシュツ
  • 分解剤の影響
  • Effects of conditions of extraction reagent

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抄録

In the cource of autoclave extraction of scheelite with Na2CO3 solution, the effects of conditions of extraction reagent to the WO3 recovery are fully discussed.<BR>Increase of Na2CO3 equivalent to CaWO4 promotes WO3 extraction. Rate of increase of WO3 extraction is 5-7% per 0.1 Na2CO3 equivalent.<BR>Increase of Na2CO3 concentration decreases WO3 extraction and rate of decrease is about 3% per 10g/l of Na2CO3. Necessary amount of Na2CO3 is minimum when Na2CO3 concentration is 30-50g/l, and 2.7 equivalent at 197°C of reaction temperature.<BR>By determing Na2CO3 equivalent and concentration of Na2CO3 solution as intial conditions, we could have obtained general conditions available for all grades of scheelite.<BR>Addition of small amount of NaOH, NaHCO3 or K2CO3 in Na2CO3 solution promotes WO3 extraction. Especially K2CO3 is effective both as promoter of Na2CO3 and as extratcion reagent itself.

収録刊行物

  • 日本鑛業會誌

    日本鑛業會誌 78 (892), 745-750, 1962

    一般社団法人 資源・素材学会

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