کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
229155 | 464861 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of high concentrations of calcium hydroxide in neutralised synthetic supernatant liquor—Implications for alumina refinery residues
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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![عکس صفحه اول مقاله: The effect of high concentrations of calcium hydroxide in neutralised synthetic supernatant liquor—Implications for alumina refinery residues The effect of high concentrations of calcium hydroxide in neutralised synthetic supernatant liquor—Implications for alumina refinery residues](/preview/png/229155.png)
چکیده انگلیسی
The presence of calcium hydroxide in Bayer residue slurry inhibits the effectiveness of seawater neutralisation. An increase in the slurry pH, after neutralisation, is caused by the dissolution of calcium hydroxide and hydrocalumite (both components are found in the solid residue). At increased calcium hydroxide concentrations, additional hydrocalumite forms. Hydrocalumite has been found to be unstable when the solution pH is less than 10.5, releasing OH− ions and aluminium ions back into solution (pH and aluminium reversion). Through this mechanism, the concentration of calcium hydroxide in alumina refinery residues has an impact on seawater neutralisation process efficiency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 17, Issue 1, 25 January 2011, Pages 56–61
Journal: Journal of Industrial and Engineering Chemistry - Volume 17, Issue 1, 25 January 2011, Pages 56–61
نویسندگان
Sara J. Palmer, Matthew K. Smith, Ray L. Frost,