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Metal Mine ›› 2015, Vol. 44 ›› Issue (12): 83-88.

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Research on Rubidium Extraction from a Refractory Rubidium Ore

Cao Yaohua1,2,3,Gao Zhaoguo1,2,3,Wang Shoujing1,2,3,Wang Wei1,2,3,Liu Hongzhao1,2,3   

  1. 1.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450006,China;2.Key Laboratory for Polymetallic Evaluation and Utilization,MLR,Zhengzhou 450006,China;3.Comprehensive Utilization Key Laboratory of Gold Resource in Henan Province,Zhengzhou 450006,China
  • Online:2015-12-15 Published:2016-03-09

Abstract: The structure of a refractory rubidium ore is granite,and the content of Rb2O was 0.13%.Rubidium mainly occurred in zinnwaldite and potassium feldspar in a decentralized state,the rubidium-bearing minerals were very difficult to be enriched by beneficiation methods.In order to develop and utilize the ore,the pyrometallurgical method and hydrometallurgical method were adopted to extract rubidium.Results showed that the leaching rate of rubidium was 93.87% after five-stage counter-current leaching,total extraction rate was 98.50% after two-round four-stage extracting,back-extraction rate was 99.75% after three-stage back-extracting,and total recovery rate of rubidium was 92.23%.The purity of rubidium chloride product was 99.75% and can meet with market quality standard.Multistage counter-current leaching technology and removing calcium leaching process can simplify the rubidium extraction process,which is an innovative method to deal with this type of ore.

Key words: Rubidium ore, Roasting, Leaching, Extraction, Rubidium chloride