Recovery of tungsten from wolframite from the Igarapé Manteiga mine (Rondônia - Brazil) via acidic leaching

Química Nova

Afonso, Julio Carlos¹  Cunha, José Waldemar Silva Dias da¹  Instituto de Engenharia Nuclear, Rio de Janeiro, Brasil¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Paulino, Jéssica Frontino¹  Vianna, Cláudio Augusto¹  Mantovano, José Luiz¹ 

关键词: tungsten;    wolframite;    acid leaching.;   

DOI  :  10.1590/S0100-40422012000900026

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown