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金属矿山 ›› 2019, Vol. 48 ›› Issue (05): 79-83.

• 矿物工程 • 上一篇    下一篇

赞比亚某氧化铜矿石的硫酸酸浸研究

杨思敏1,2,寇珏1,2,张晓亮1,2,孙春宝1,2   

  1. 1. 北京科技大学土木与资源工程学院,北京100083;2. 金属矿山高效开采与安全教育部重点实验室,北京100083
  • 出版日期:2019-05-15 发布日期:2019-07-03
  • 基金资助:

    国家自然基金科学资助项目(编号:51574018)。

Study on Sulfuric Acid Leaching of Copper Oxide Ores in Zambia

Yang Simin1,2,Kou Jue1,2,Zhang Xiaoliang1,2,Sun Chunbao1,2   

  1. 1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China ;2. Key Laboratory of High-efficient Mining and Safety of Metal Mines,Ministry of Education,Beijing 100083,China
  • Online:2019-05-15 Published:2019-07-03

摘要: 赞比亚某低品位高结合率难处理氧化铜矿石铜品位为1.56%,主要铜矿物为赤铜矿、黄铜矿、铜蓝、水胆矾;主要脉石矿物为石英、云母、铁白云石等。铜氧化率高达82.85%,以结合氧化铜为主;硫化铜仅占17.15%,主要为原生硫化铜。为确定该矿石的合理开发利用工艺,进行了系统的硫酸酸浸试验。结果表明:①提高浸出试样细度,延长浸出时间,提高浸出温度,增大液固质量比和搅拌速度均有利于改善氧化铜矿石的浸出效果。②矿石在磨矿细度为-200目占60%、硫酸浓度为50 g/L、液固质量比为3、浸出温度为65 ℃、搅拌速度为300 r/min,浸出时间为120 min情况下,铜的浸出率达78.64%。③硫酸浸出该矿石的浸出动力学受化学反应模型控制,反应的表观活化能为37.83 kJ/mol。

关键词: 氧化铜矿石, 硫酸酸浸, 铜浸出率, 动力学, 表观活化能

Abstract: The copper grade of refractory copper oxide ores with low grade and high binding rate in Zambia is 1.56%. The major copper ores are cuprite, chalcopyrite, covellite and brochantite. The major gangue minerals are quartz, mica, ankerite and so on. The oxidation rate of copper reaches up to 82.85%, mainly combined copper oxide. Copper sulfide accounts for only 17.15%, mainly with primary copper sulfide ores. In order to determine the reasonable development and utilization technology of the ores, systematic sulfuric acid leaching experiments were carried out. The results showed that: ①Improving the fineness of leaching samples, increasing the leaching time, improving the leaching temperature, and increasing the liquid-solid mass ratio and stirring speed are beneficial to improve the leaching effect of copper oxide ores.② In the case of grinding fineness of -0.074 mm 60%, sulfuric acid concentration of 50 g/L, liquid-solid mass ratio of 3, leaching temperature at 65 ℃, stirring speed at 300 r/min, and the leaching time for 120 min, the leaching rate of copper is up to 78.64%.③ Sulfuric acid leaching kinetics of the ores is controlled by the chemical reaction model, and the apparent activation energy of the reaction is 37.83 kJ/mol.

Key words: Copper oxide ores, Sulfuric acid leaching, Copper leaching rate, Kinetics, Apparent activation energy