Decomposition Behaviors of Tantalum-Niobium Ore in Sodium Hydroxide System

Abstract:

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A new method for the decomposition of low-grade refractory tantalum-niobium ores using sodium hydroxide fusion was proposed. The effects of initial mineral particle size, alkali to ore mass ratio, decomposition temperature and decomposition time on the decomposition rate of the tantalum-niobium ore were investigated. The alkali to ore mass ratio, decomposition temperature and initial mineral particle size showed significant influence on the decomposition of tantalum-niobium ore. The results show that the decomposition rates of cassiterotantalite and pyrochlore in the ore can be above 98% and 99% respectively when the initial mineral particle size is less than 75µm, the mass ratio of alkali to ore is 1:1, the decomposition temperature is 650°C and the decomposition time is 30min.

Info:

Periodical:

Advanced Materials Research (Volumes 361-363)

Edited by:

Qunjie Xu, Honghua Ge and Junxi Zhang

Pages:

644-649

DOI:

10.4028/www.scientific.net/AMR.361-363.644

Citation:

X. L. Yang et al., "Decomposition Behaviors of Tantalum-Niobium Ore in Sodium Hydroxide System", Advanced Materials Research, Vols. 361-363, pp. 644-649, 2012

Online since:

October 2011

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$35.00

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