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THERMAL BEHA VIOR OF PYROPHYLLITE ORE DURING CALCINATION FOR THERMAL ACTIV ATION FOR ALUMINUM EXTRACTION BY ACID LEACHING

MURAT ERDEMOĞLU, MUSTAFA BIRINCI

2017enaluminacalcinationpyrophylliteacid leachingthermal behavior

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In the production of alumina (Al2O3) from clays by acid leaching, thermal activation by calcination is widely applied as a pre-treatment to enhance aluminum dissolution. This study aimed to characterize the thermal behavior of a clay ore, primarily composed of pyrophyllite, kaolinite, muscovite, quartz, and kyanite from the Pütürge clay deposits in Turkey, focusing on its potential for aluminum extraction via acid leaching. The mineralogical transformation and the corresponding aluminum recovery were investigated by analyzing the ore and its calcination products at various temperatures regarding their mineral composition, crystal structure, morphology, and thermal properties. The results indicated that aluminum recovery proportionately increased with the degree of dehydroxylation as calcination temperatures rose to 900°C, achieving a maximum extraction rate of 90.57%. However, above this temperature, a significant decline in aluminum extraction was observed, attributed to the compaction and re-crystallization of the previously exfoliated mineral layers into structures less susceptible to acid leaching. This research elucidates the critical temperature-dependent transformations affecting the viability of complex clay ores in alumina production.

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Cite This Work

@article{ca905c7d-3384-48f9-b7bc-a45d872b0b90,
  title={THERMAL BEHA VIOR OF PYROPHYLLITE ORE DURING CALCINATION FOR THERMAL ACTIV ATION FOR ALUMINUM EXTRACTION BY ACID LEACHING},
  author={MURAT ERDEMOĞLU and MUSTAFA BIRINCI},
  year={2017},
  language={en}
}
TY  - JOUR
TI  - THERMAL BEHA VIOR OF PYROPHYLLITE ORE DURING CALCINATION FOR THERMAL ACTIV ATION FOR ALUMINUM EXTRACTION BY ACID LEACHING
AU  - MURAT ERDEMOĞLU
AU  - MUSTAFA BIRINCI
PY  - 2017
LA  - en
ER  -

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