Extraction of potassium from feldspar by roasting with CaCl2 obtained from the acidic leaching of wollastonite-calcite ore

Tülay Türk, Zeynep Üçerler, Fırat Burat, Gülay Bulut, Murat Olgaç Kangal*

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Araştırma sonucu: ???type-name???Makalebilirkişi

11 Atıf (Scopus)

Özet

Potassium, which is included in certain contents in the structure of K-feldspar minerals, has a very important function in the growth of plants. Turkey hosts the largest feldspar reserves in the world and is by far the leader in feldspar mining. The production of potassium salts from local natural sources can provide great contributions both socially and economically in the agriculture industry along with glass production, cleaning materials, paint, bleaching powders, and general laboratory purposes. In this study, potassium extraction from K-feldspar ore with an 8.42% K2O content was studied using chloridizing (CaCl2) roasting followed by water leaching. Initially, to produce wollastonite and calcite concentrates, froth flotation tests were conducted on wollastonite-calcite ore after comminution. Thus, wollastonite and calcite concentrates with purities of 99.4% and 91.96% were successfully produced. Then, a calcite concentrate was combined with hydrochloric acid (HCl) under optimal conditions of a 1 mol/L HCl acid concentration, a 60C leaching temperature, and a 10 min leaching time to produce CaCl2. To bring out the importance of roasting before the dissolution process, different parameters such as roasting temperature, duration, and feldspar—CaCl2 ratios were tested. Under optimal conditions (a 900C roasting temperature, a 60 min duration, and a 1:1.5 feldspar—CaCl2 ratio), 98.6% of the potassium was successfully extracted by the water leaching process described in this article.

Orijinal dilİngilizce
Makale numarası1369
DergiMinerals
Hacim11
Basın numarası12
DOI'lar
Yayın durumuYayınlandı - Ara 2021

Bibliyografik not

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Finansman

Acknowledgments: The authors express their sincere thanks and appreciation to Istanbul Technical University Circulating Capital Enterprise R&D and BS Invest Co. for financial support and for kindly providing the feldspar samples. Funding: This research was funded by Istanbul Technical University Circulating Capital Enterprise R&D, Project ID: 42017.

FinansörlerFinansör numarası
Istanbul Technical University Circulating Capital Enterprise R&D42017

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