کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
211833 462020 2016 6 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Fluoride removal from Double Leached Waelz Oxide leach solutions as alternative feeds to Zinc Calcine leaching liquors in the electrolytic zinc production process
ترجمه فارسی عنوان
حذف فلوراید از محلول های دوگانه اشباع اکسید واکسن Waelz اشباع شده به عنوان تغذیه جایگزین برای liquors لیچینگ کلسین روی در فرآیند تولید الکترولیتیک روی
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کلمات کلیدی
فرآیند Hydrometallurgical؛ روی الکترولیتیک؛ حذف فلورید؛ متالورژی پایدار
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• To make possible the electrolytic zinc production from secondary zinc recycling
• Fluoride removal before zinc electrowinning stage avoiding the cathodic corrosion
• An improvement to increase the sustainability of the zinc and steelmaking industries
• The impurities evolution along the developed process before cementation is studied.

The most important limitation of leached Waelz Oxide from the pyrometallurgical treatment of Electric Arc Furnace Dust (EAFD) is its high fluorine content. This work deals with the reduction of the harmful effects of the Double Leached Waelz Oxide fluorine content in the hydrometallurgical process for electrolytic zinc production process when it is used as raw material directly in the leaching stage. The resulting process is a purification treatment of Double Leached Waelz Oxide leach solution to remove the dissolved fluoride in this unpurified zinc liquor. Leached fluorides from this liquor are precipitated in order to reduce their concentration until the specified values, avoiding cathode corrosion in the electrowinning cells. In this paper a selective precipitation process to maximize the fluoride removal and to minimize the zinc losses is presented, achieving the industrially specified solution composition when the Zinc Calcine is the used raw material. The formation of aluminium-fluoride complexes and the variation of their solubilities with the pH evolution are the basis of the proposed treatment. In addition, this fluoride removal has also been improved and optimized in order to be integrated in the overall industrial hydrometallurgical process and the obtained results are presented and discussed proving the viability of this improved stage.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 161, May 2016, Pages 65–70
نویسندگان
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