Determination of the Optimum Conditions for Leaching of Malachite Ore in H2SO4 Solutions

✍ Scribed by O. N. Ata; S. Çolak; Z. Ekinci; M. Çopur

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 157 KB
• Volume: 24
• Category: Article
• ISSN: 0930-7516
• DOI: 10.1002/1521-4125(200104)24:4<409::aid-ceat409>3.0.co;2-0

✦ Synopsis

The Taguchi method has been used to determine the optimum conditions for the dissolution of malachite ore in H 2 SO 4 solutions. The chosen experimental parameters and their range were (i) reaction temperature: 15 to 45 C, (ii) solid-to-liquid ratio: 1/10 to 1/3 g cm ±3 , (iii) acid concentration (in weight): 2 % to 10 %, (iv) particle size: ±40 to ±3.5 mesh, (v) stirring speed: 240 to 720 rpm, and (vi) reaction time: 5 to 45 minutes. The optimum conditions were found to be reaction temperature: 40 C, solid-to-liquid ratio: 1/3 g cm ±3 , acid concentration (in weight): 10 %, particle size: ±30 mesh, stirring speed: 480 rpm, and reaction time: 45 minutes. Under these optimum working conditions, the dissolution of copper and iron in malachite ore was 100 % and 58 %, respectively. Besides, alternative working conditions reducing the total cost and dissolution of iron were found.