Author/Authors

Guo، نويسنده , , Yanxia and Yan، نويسنده , , Kezhou and Cui، نويسنده , , Li and Cheng، نويسنده , , Fangqin and Lou، نويسنده , , Helen H.، نويسنده ,

DocumentNumber

3269038

Title Of Article

Effect of Na2CO3 additive on the activation of coal gangue for alumina extraction

شماره ركورد

9734

Latin Abstract

The effect of Na2CO3 additive on the activation of coal gangue for alumina extraction was investigated. The discussion on the action mechanisms was performed by the means of TG-DSC, XRD and XRF. The results showed that the calcined coal gangue with the addition of Na2CO3 improved the alumina extraction significantly. At the calcination temperatures of 800–900 °C with Na2CO3 to coal gangue weight ratios of 0.8–1, the alumina extractions of > 90% were obtained. There were reactions between Na2CO3 and coal gangue during the calcination to form nepheline, which improved the dissolution of Al2O3 in acid and enriched SiO2 concentration in the residue during the acid leaching process. Na2CO3 could attack AlO6 and SiO4 network in coal gangue owing to the compensation charge effect, and therefore facilitate the decomposition of coal gangue.

From Page

51

NaturalLanguageKeyword

Coal gangue , Alumina extraction , Na2CO3 , activation

JournalTitle

Studia Iranica

To Page

57

To Page

57