Synthetic of pure alumina from aluminum scrap

Abdul Najib Khan, A. Shafiq Khan and Othman, Nur Ezzah Faezah and Purwanto, Hadi and Abdul halim, Hafasihah and Shamsul Baharin, Ahmad Firdaus (2015) Synthetic of pure alumina from aluminum scrap. In: International Conference in Advances in Manufacturing And Materials Engineering, 23-25 sep 2014, Kuala Lumpur.

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Abstract

Abundance in aluminum scrap metals can cause problem such as limited space allocation and pollution. The solution to solve these problems were by recycling the aluminum scrap metal as secondary production of aluminum. Among the recycling process alternative is smelting, However, the process consumes high energy with low productivity. This study focuses on alumina production from aluminum scrap waste. Dissolution process of Al scrap with 0.5M sodium hydroxide (NaOH) yields Al (OH) 3 and hydrogen gas. Results show that the temperature gradually decreased from 40°C to 35.7°C as the reaction took place. The pH of the solution during dissolution process increased from 12.08 to 12.38. The XRD results show that after calcination of Al (OH)3 powders at 1500°C, α-Al2O3 peaks could be observed. SEM morphology shows that the calcination process changes the Al (OH)3 powders from hexagonal shape to form α-Al2O3 with rounded shape.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	5804/41103 ISSN: 1662-8985 pp: 170-173
Uncontrolled Keywords:	Aluminum scrap, dissolution, precipitation, calcination, alumina
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction T Technology > TN Mining engineering. Metallurgy > TN600 Metallurgy
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Hadi Purwanto
Date Deposited:	04 Jun 2015 09:33
Last Modified:	19 Dec 2016 10:27
URI:	http://irep.iium.edu.my/id/eprint/41103

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