Study on leaching vanadium from roasted residue of stone coal

Journal Article · Sat Nov 15 04:00:00 EST 2008 · Minerals and Metallurgical Processing

OSTI ID:21222467

He, D; Feng, Q; Zhang, G; Luo, W; Ou, L ^[1]

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1. Central South University, Changsha (China)

In China, the total reserves of vanadium, reported as V{sub 2}O{sub 5}, in stone coal is 118 Mt (130 million st). Recovering vanadium from such a large resource is very important to China's vanadium industry. The technology now being used to recover vanadium from stone coal has the following two problems in the leaching process: a low recovery of vanadium and high acid consumption. To resolve these problems, a new leaching technology is proposed. The effects of factors such as H{sub 2}SO{sub 4} concentration, liquid-solid ratio, temperature and time, and the types and additions of additives were studied. By adding 1.5% (by weight) CaF2 and leaching the roasted residue of stone coal with 5.4% (by weight) sulfuric acid at 90{sup o}C for 12 hours at a liquid-solid ratio of 2 mL/g, the leaching degree of vanadium reached 83.10%. This proposed leaching technology gives a feasible alternative for the processing of roasting residue of stone coal and can be applied in the comprehensive utilization of stone coal ores in China.

• OSTI ID: 21222467
• Journal Information: Minerals and Metallurgical Processing, Journal Name: Minerals and Metallurgical Processing Journal Issue: 4 Vol. 25; ISSN MMPRE8; ISSN 0747-9182
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CALCIUM FLUORIDES
CHINA
COAL
LEACHING
MATERIALS RECOVERY
PARAMETRIC ANALYSIS
RESIDUES
ROASTING
SULFURIC ACID
VANADIUM