کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6659243 462021 2016 32 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An efficient method of chromium extraction from chromium-containing slag with a high silicon content
ترجمه فارسی عنوان
روش کارآمد استخراج کروم از سرب حاوی کروم با محتوای سیلیکونی بالا
کلمات کلیدی
سرم حاوی کروم، تمیزکاری، سینتیک، کباب کردن بدون آهک،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
An efficient process was proposed for extracting chromium from chromium-containing slag after desilication with aqueous NaOH solution. The effect of the NaOH concentration, liquid-to-solid mass ratio, and leaching temperature on the leaching rate of silicon was investigated. The results showed that 83.78% of the silicon, 41.87% of the aluminum, and 46.42% of the vanadium were removed from the slag under suitable conditions. The kinetic analysis results showed that the leaching rate of silicon is controlled by a chemical reaction under two regimes due to the two silicon-bearing minerals presented in the slag. The first stage is limited by the reaction between NaOH and SiO2, whereas the second stage is subject to the reaction between NaOH and 2MgO·2Al2O3·5SiO2. The corresponding apparent activation energies were calculated to be 67.27 kJ/mol and 35.82 kJ/mol, respectively. The extraction rate of chromium from the leaching residue using lime-free roasting reached 98.41%, which was highly superior to the 9.85% obtained from the slag without desilication.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 162, June 2016, Pages 86-93
نویسندگان
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