摘要
为了确定羊拉铜矿搅浸工艺参数最优组合,进行了高含泥氧化铜矿浸出性能试验研究。首先采用均匀设计法进行试验方案设计,并对试验结果进行回归分析。数据表明:液固比、酸度对铜浸出率影响较大,搅拌时间、酸度对酸耗增加影响较大。然后,对3.75:1、4:1和4.25:1三种液固比下氧化铜矿搅拌浸出效果进行试验。多组试验结果对比分析显示:液固比的增加虽能提高铜的浸出率,却导致酸耗增加;硫酸浓度大幅增加并不能提高铜的浸出率,却可加快铁的浸出,而且大量的硫酸会消耗在与脉石矿物的反应中;当液固比为4:1,酸度为50～55g/L时,铜、铁浸出率和酸耗有较好的组合关系。现场应用表明,加热条件下氧化铜矿的浸出率明显提高。
In order to determine the optimal process parameters of agitation leaching in Yangla copper mine,experiments were carried out on leaching behaviors of copper oxide ore with high mud content.First,the uniform design method was used to design test schemes and regression analysis was performed on the results.It is shown that the liquid-solid ratio and acidity have greater contributions to the copper leaching efficiency,and agitation time and acidity have greater effects on the acid consumption.Then,the agitation leaching effects were tested for three liquid-solid ratios,namely,3.75：1,4：1 and 4.25：1.The results show that the increase in liquid-solid ratio can improve the leaching efficiency of copper,but result in increased acid consumption.Increase of the sulfuric acid concentration can not improve the leaching efficiency of copper,but can accelerate the leaching of ferrous.In addition,a large amount of sulfuric acid is consumed by the reaction with gangue minerals.When the liquid-solid ratio is 4：1 and the acidity is 50-55 g/L,copper or iron leaching efficiency and acid consumption are a good combination.Field applications indicate that leaching efficiency of copper oxide ore can be greatly improved under the condition of heating.
基金
高等学校博士学科点专项科研基金资助项目(20070008038)
国家自然科学基金重点项目(50934002)
关键词
均匀设计法
酸度
浸出率
酸耗
uniform design method
acidity
leaching efficiency
acid consumption
