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金属矿山 ›› 2017, Vol. 46 ›› Issue (06): 104-108.

• 矿物工程 • 上一篇    下一篇

明矾石精矿焙烧—酸浸提取K和Al

张永康1,2,3,胡四春1,2,3,张耀1,2,3,马化龙1,2,3,冯乃琦1,2,3   

  1. 1.中国地质科学院郑州矿产综合利用研究所,河南 郑州 450006;2.国家非金属矿产资源综合利用工程技术研究中心,河南 郑州 450006;3.河南省黄金资源综合利用重点实验室,河南 郑州 450006
  • 出版日期:2017-06-15 发布日期:2017-09-27
  • 基金资助:

    中国地质调查局地质调查项目(编号:12120101700015000104)。

Roasting-acid Leaching of K and Al from Alunite Concentrate

Zhang Yongkang1,2,3,Hu Sichun1,2,3,Zhang Yao1,2,3,Ma Hualong1,2,3,Feng Naiqi1,2,3   

  1. 1.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,Chinese Academy of Geological Sciences,Zhengzhou 450006,China;2.National Research Center of Multipurpose Utilization of Non-metallic Mineral Resources,Zhengzhou 450006,China;3.Key Laboratory of Gold Resource Comprehensive Utilization in Henan Province,Zhengzhou 450006,China
  • Online:2017-06-15 Published:2017-09-27

摘要: 福建紫金山选铜尾矿浮选得到的明矾石精矿主要化学组成为Al2O3、SiO2、K2O和SO3,主要矿物组成是明矾石、石英、地开石。为从该明矾石精矿中提取有价元素Al、K,进行了焙烧—浸出试验。结果表明:明矾石精矿在600 ℃焙烧1 h,焙烧产品在硫酸浓度为60 g/L、浸出温度为80 ℃、液固比为6、浸出时间为0.5 h条件下搅拌浸出,K的浸出率为98.47%,Al的浸出率为94.35%;浸出后浸渣的主要化学成分是二氧化硅和氧化铝,二者含量合计达到90.44%,可作为建筑原料。试验结果可以为酸法综合利用明矾石精矿提供技术指导。

关键词: 明矾石精矿, 焙烧, 浸出

Abstract: Main chemical composition of alunite concentrate,which was recovered from Zijinshan copper tailings in Fujian by flotation,were Al2O3,SiO2,K2O and SO3.Main mineral composition of alunite concentrate were alunite,quartz and dickite.Roasting-leaching tests were studied to extract valuable elements of Al and K from alunite concentrate.Results showed:alunite concentrate roasting at 600 ℃ for 1 h,roasted products leaching with sulfuric acid concentration of 60 g/L,leaching temperature of 80 ℃,liquid-solid ratio of 6,leaching time of 0.5 h,leaching rate of potassium was 98.47% and leaching rate of aluminum was 94.35%;Main chemical compositions of residue from leaching process were Al2O3 and SiO2,whose contents totaled to 90.44%.The residue was suitable as construction materials.Test results could provide technical support for the multipurpose utilization of the alunite concentrate by acid leaching process.

Key words: Alunite concentrate, Roasting, Leaching rate