November 2023
Volume 75    Issue 11

Aluminum recovery by acid leaching of variously enriched pyrophyllite ore: Effects of pretreatment methods for activation

Aydogmus, Ramazan; Erdemoglu, Murat; Uysal, Turan


The effects of calcination for thermal activation, and intensive milling for mechanical activation, on the aluminum (Al) recovery by acid leaching of a pyrophyllite ore enriched via attrition scrubbing and froth flotation are investigated in this study. Specific thermal and milling energies consumed per unit amount of the ore are calculated, and an ideal activation method is proposed by comparing the activation methods in terms of energy consumption. Mechanical activation of the concentrate obtained by attrition scrubbing is suggested for higher aluminum recoveries. In terms of energy, the operating cost of mechanical activation is determined to be lower, and its aluminum recovery is higher than with thermal activation. It is concluded that mechanical activation is a more economical and environmentally friendly method.

Full-text paper:
Mining, Metallurgy & Exploration (2023) 40:1333–1343,


Follow these easy steps if you are an SME member:
  • Go to . Sign in with your email address and password.
  • Hover your mouse over “Publications and Resources” in the top banner. Click on “Mining, Metallurgy & Exploration (MME) Journal” in the pull-down menu.
  • Scroll down and click on the “Read the MME Journal Online” button, which will take you to the Springer site as an SME member who is eligible for free access. (To see published papers on the Springer site, click on “Browse Volumes & Issues” in the blue banner.)
If you are not an SME member, go to for paid access. Or join SME at