کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1636417 1516956 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of high purity cadmium with micro-spherical architecture from zinc flue dust
ترجمه فارسی عنوان
آماده سازی کادمیوم با خلوص بالا با معماری میکرو کروی از گرد و غبار ذوب روی
کلمات کلیدی
گرد و غبار ذوب روی، حذف ناخالصی، میکرو کروی، پودر کادمیوم،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
This research has focused on the treatment of zinc flue dust by an acid leach process, combining an environmentally suitable impurity removal process to recover cadmium. Optimum conditions were found as follows: H2SO4 concentration 90 g/L, liquid/solid ratio 6:1, leaching temperature 60 °C and leaching time 1.0 h. Under these conditions, 95.8% cadmium was recovered. FeAsO4 and Fe(OH)3 precipitates with FeCl3 are found to be highly effective to obtain a high degree of separation of heavy metals and the oxyanions of arsenic from the leachate. The overall separation of arsenic and other heavy metals and precipitate settling rates are optimum at n(Fe)/n(As) ratio of 3:1 and pH 6. The removal rates of Fe, Pb and Cu from the solution were greater than 98.9%, and As removal rate was 99.6%. A solvent extraction with P204 was used for the separation of zinc and cadmium. Optimum conditions are obtained as follows: 20% P204 (volume fraction) diluted with kerosene at room temperature, pH 3.0, and varying organic/aqueous (O/A) phase ratio 1:1. The extraction rate of zinc is 99.2% under these conditions. Spherical cadmium particles showing nearly uniform size were produced by hydrogen reduction at 310 °C and the crystal structure was cubic. In addition, the purity of the recovered cadmium powder is more than 99.99%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 6, June 2015, Pages 2073-2080
نویسندگان
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