粘土原鉱中の微細硫化鉱物粒子の油相分離　Ｉ　　亜鉛鉱床に生成するセリサイトの精製

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  • 林 剛
    東京工業大学工学部無機材料工学科

書誌事項

タイトル別名
  • Refinement of Sericite Formed in Zinc Ore Deposit
  • ネンド ゲンコウチュウ ノ ビサイ リュウカ コウブツ リュウシ ノ ユソウ
  • 粘土原鉱中の微細硫化鉱物粒子の油相分離, 第1報

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The flushing method was adopted to separate the very fine sulfide mineral particles of sphalerite and arsenopyrite from the sericite which is formed in the zinc ore deposit at Tagokura mine, Fukushima prefecture. Since the sulfide minerals of fine particle size concentrate at the oil/water interface more easily than at the air/water interface, the method which transferred directly the fine sulfide mineral particles from the sericite slurry into kerosene was very favorable compared with the conventional flotation. method<br>The most important factor influenced the efficiency for separation of sulfide minerals was the dispersing state of the slurry. On this factor the elimination of the influences caused by the oxidized substances of sulfide minerals formed in natural circumstance or in condition of ore storage increased remarkably the dispersion of the slurry by addition of reductant and chelating agent with the pH control. Sphalerite showed the best condition for removing at pH 8 and the presence of sodium citrate. However, arsenopyrite was removed more effectively at the conditions of pH 3 and the presence of sodium citrate where the dissolved metal ions can exist favorably in solution than at the condition of pH 8.<br>Aerofloat 208 and fatty acid soap were used to increase the lyophilic property of the surface of the sulfide minerals. MIBK did the promotive action of separating sulfide-oil drops smoothly from the sericite slurry and controlled the emulsification of the slurry by the excess addition of the collector. By the refining treatment, more than 90% of zinc and arsenic were removed from the raw sericite and each contents were decreased less than 100 ppm and 5 ppm, respectively.

収録刊行物

  • 窯業協會誌

    窯業協會誌 87 (1006), 290-300, 1979

    公益社団法人 日本セラミックス協会

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