In this study, effect of activation conditions on the recovery of aluminum (Al) obtained by acid
leaching from Pütürge (Malatya) pyrophyllite ore containing 23.6% Al2O3 was investigated. In this
context, the initially non-activated ore and later activated ore samples using calcining and intensive
milling were leached with HCl, separately. According to the experimental results, Al-recovery in
the leachate for the raw, calcined and intensively milled ore samples were found to be 10.57%,
33.63% and 86.5%, respectively. It was also found that there was not sufficient dilation between
the clay layers during calcination and the porous structure could not be obtained, also the new
mineral phases which resist to dissolution in acidic media were formed at high temperatures. For
this reason, the aluminum recovery of thermally activated ore was relatively low. However, it was
confirmed that mechanical activation by intensive milling led to amorphization of clay minerals,
and thus, the mechanical activation significantly improved the dissolution behavior of aluminum.
As a result of this study, it is concluded that while Al recovery is slightly increased by thermal
activation, it is dramatically increased by mechanical activation.
Pyrophyllite Aluminum Acid leaching Calcination Intensive milling
Birincil Dil | Türkçe |
---|---|
Bölüm | Araştırma Makalesi |
Yazarlar | |
Yayımlanma Tarihi | 1 Haziran 2019 |
Gönderilme Tarihi | 13 Aralık 2018 |
Yayımlandığı Sayı | Yıl 2019 Cilt: 58 Sayı: 2 |