Isolamento do tungstênio da volframita da mina de Igarapé Manteiga (Rondônia - Brasil) por lixiviação ácida

Química Nova

Jéssica Frontino Paulino²  Julio Carlos Afonso²  José Luiz Mantovano¹  Cláudio Augusto Vianna¹  José Waldemar Silva Dias Da Cunha¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Química Departamento de Química AnalíticaRio de Janeiro RJ ,Brasil

关键词: tungsten;    wolframite;    acid leaching;   

DOI  :  10.1590/S0100-40422012000900026

来源: SciELO

【 摘 要 】

We report results of the efficiency of tungsten extraction from wolframite concentrate (containing 61.5 wt % WO3) from the Igarapé Manteiga mine (state of Rondônia, Brazil) through acid leaching with strong mineral acids at 100 ºC and 400 rpm for 2-4 h. HCl yielded insoluble matter containing the highest WO3 content (90 wt %). This solid was dissolved in concentrated NH3(aq) at 25 ºC and the insoluble matter filtrated. The filtrate was slowly evaporated. 70 wt % of the tungsten present in the starting concentrate material was recovered as ammonium paratungstate (APT).

【 授权许可】

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