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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 754 pages |
| ISBN: | 978-0-9879917-3-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Zinc Recovery Form Hard Zinc
Ricardo Sanchez-Alvarado1; Chavez-Alcala Jose-Federico1; Alejandro Cruz-Rami�rez1;1ESIQIE-IPN, Mexico City, Mexico;
Type of Paper: Regular
Id Paper: 208
Topic: 12
Abstract:
In the Deep Galvanizing Process the two zinc containing residues are: zinc ash and hard zinc. The amount of produced zinc ash is approximately 13 wt.-% and of hard zinc around 12 wt.-% of the zinc input.The aim of the presented work is the recovery of the metallic zinc hard zinc by using the ceramic filtering technology. Aluminum is used as refining agent. Between 1 to 4 % weight has been added to melted hard zinc to form intermetalic phases Fex-Aly at temperatures between 450 and 550°C. Argon gas was used in the process to obtain an inert atmosphere. Absorption atomic spectroscopy, Scanning Electronic and Optical Microscopy were used to analyze the refining and liberation of Zinc form Hard Zinc. The results applying the best process parameters of laboratory scale tests are resulting in a zinc recovery of 65 % by separating the intermetallic phases from hard zinc.