کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8011982 1516934 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of iron-containing phases on transformation of sulfur-bearing ions in sodium aluminate solution
ترجمه فارسی عنوان
اثرات فازهای حاوی آهن در تبدیل یون های گوگرد در محلول آلومینات سدیم
کلمات کلیدی
بوکسیت بالا گوگرد، محلول سدیم آلومینات، یون گوگرد، آهن حاوی فاز، دگرگونی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
Sulfides in the high-sulfur bauxite lead to serious steel equipment corrosion and alumina product degradation via the Bayer process, owing to the reactions of sulfur and iron-containing phases in the sodium aluminate solution. The effects of iron-containing phases on the transformation of sulfur-bearing ions (S2-, S2O32−, SO32− and SO42−) in sodium aluminate solution were investigated. Fe, Fe2O3 and Fe3O4 barely react with SO32− and SO42−, but all of them, particularly Fe, can promote the conversion of S2O32− to SO32− and S2- in sodium aluminate solution. Fe can convert to Fe(OH)3− in solution at elevated temperatures, and further react with S2- to form FeS2, but Fe2O3 and Fe3O4 have little influence on the reaction behavior of S2- in sodium aluminate solution. Increasing temperature, duration, dosage of Fe, mole ratio of Na2Ok to Al2O3 and caustic soda concentration are beneficial to the transformation of S2O32− to SO32− and S2-. The results may contribute to the development of technologies for alleviating the equipment corrosion and reducing caustic consumption during the high-sulfur bauxite treatment by the Bayer process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 27, Issue 4, April 2017, Pages 908-916
نویسندگان
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