Jianhua Zou, Heming Tian
The tuff, a part of coal-bearing strata, in the Zhongliangshan coal mine, Chongqing, southwestern China, hosts a rare metal deposit enriched in rare earth elements (REE), Ga and Nb. However, the extraction techniques directly related to the recovery of rare metals in coal-bearing strata have been little-studied in the literature. The purpose of this paper is to investigate the extractability of REE, Ga and Nb in the tuff in the Zhongliangshan mine using the alkaline sintering-water immersion-acid leaching (ASWIAL) method. The results show that ASWIAL can separate and extract REE, Ga and Nb effectively under the optimized conditions of calcining at 860 ◦C for 0.5 h with a sample to sintering agent ratio of 1:1.5, immersing at 90 ◦C for 2 h with 150 mL hot water dosage, and leaching using 4 mol/L HCl at 40 ◦C for 2 h with a liquid-solid ratio of 20:1 (mL:g). The final leaching efficiencies of REE and Ga are up to 85.81% and 93.37%, respectively, whereas the leaching efficiency of Nb is less than 1%, suggesting the high concentration of Nb in the leaching residue, which needs further extraction.
@article{4c09f595-4c7d-4f2d-a22d-9458861e4588,
title={2017 Zou Rare metal recovery from coal bearing tuff},
author={Jianhua Zou and Heming Tian},
year={2026},
language={en}
}TY - JOUR TI - 2017 Zou Rare metal recovery from coal bearing tuff AU - Jianhua Zou AU - Heming Tian PY - 2026 LA - en ER -
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