Zinc Extraction from Electric Arc Furnace Dust via Thermal Treatment with Plastic Materials, Jordan University of Science and Technology, Chemical Engineering Department, CHE592 - GRADUATION PROJECT (II)
Al-Nu'airat, J., Aljabali, H.K., Alhammouri, I.M., Alzoubi, M.T. and Abu Al-Asal, S.I. (2013) Zinc Extraction from Electric Arc Furnace Dust via Thermal Treatment with Plastic Materials, Jordan University of Science and Technology, Chemical Engineering Department, CHE592 - GRADUATION PROJECT (II).
This project aims at resolving two significant industrial and environmental problems that face many parts of the world today: The emission of electric arc furnace dust (EAFD) and the disposal of poly(vinyl chloride) (PVC) waste. EAFD is an industrial metal waste originated from the steel industry, while PVC waste is accumulated due to the formation of many waste sources, particularly from the construction business. Both wastes are hazardous and have a high leachability propensity to the surrounding environment. Thus the regulations of disposal of these materials have become highly strict
EAFD contains valuable metals such as zinc, lead and iron. In addition, PVC can be used as a source of hydrochloric acid (HCl) when pyrolyzed. Since zinc and iron are found within EAFD mainly as oxides, the main concept utilized in this study is to use HCl produced from PVC to react with these metal oxides to form zinc and iron chlorides. Once zinc and iron chlorides are formed, the separation of iron chloride and zinc chloride in water can be achieved since they have different solubility in water. Zinc chloride has a higher solubility in water than iron chloride. This process would be carried out through thermal treatment of the EAFD with the PVC waste. However, the advantage of this project is that thermal treatment is carried out at low temperatures compared with that found in the literature.
The major results of the research that high zinc recovery was achieved (about 97%). Additionally, some other valuable metals such as lead, cadmium were recovered with acceptable percentages.
Therefore, it is clear that the Pyrolysis-Leaching-Extraction technique have success in the recovering of high percentage of zinc, with two major benefits, firstly, the treatments of two hazardous wastes (EAFD and Plastic wastes), secondly, the economic profit of high zinc recovery.
|Notes:||Jordan University of Science and Technology Chemical Engineering Department CHE592 - GRADUATION PROJECT (II)|
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