作者：Shinji MIZUHARA, Takeo URABE*, Akira YAMAGUCHI** and Tomoyuki MAEDA**
作者單位：
刊名：Journal of the Technical Association of Refractories, Japan
ISSN：
出版年：2014-03-01
卷：34
期：1
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語種：英文
關鍵詞：Chrome-containing refractories. Hexavalent chromium compounds. Characteristics. CaCrO4. Ca4Al6CrO16, Water
內容簡介The characteristics of hexavalent chromium compounds i.e. Ca4Al6CrO16 and CaCrO4. formed in the use of chrome-containing refractories, were investigated in this study. In the leachate test. the amount of Cr(VI) in the water was low in the early stage for Ca4Al6CrO16, but it increased gradually with time. On the other hand. the amount of Cr(VI) was high in the early stage of the leachate test for CaCrO4, but it decreased rapidly. Ca4Al6CrO16 was quite stable against heat treatment, whereas CaCrO4 changed its chemical form easily during heat treatment. For the practical use of chrome-containing refractories, the Cr2O3 content should be increased to form CaCrO4, which is easy to treat as waste in workability and safety.
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