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中文摘要：
采用混合水平均匀设计方案进行变水头法高碱低渗透性氧化铜矿柱浸试验,探讨了初始浸出酸度、喷淋强度和矿石粒径对矿堆渗透速度的影响,3因素对回归方程的贡献分别为0、15.6%和83.6%。采用电子探针分析、电子显微镜扫描等方法,确定了不同浸出阶段影响矿堆渗透性的主导因素分别为浸出前期为松散颗粒的物理堵塞作用,中期为悬浮液淤塞作用,后期为化学结垢和机械压实作用。渗透动力学分析结果表明,粗颗粒、细颗粒和粉末矿堆的渗透速度均随浸出时间的延长而呈指数级减小,且不同粒径矿堆的渗透速度及下降速率相差很大。
英文摘要：
Level-mixed uniform design method was adopted to carry out column leaching of alkaline low-permeability copper oxide ore on basis of variable-water-level method.Initial acid concentration,spray strength and ore particle size were selected as influencing factors.The results showed that these factors＇ contributions to regression equation were sequentially 0,15.6% and 83.6%.The results of electronic scanning and electron probe indicated that dominant influencing factors were different corresponding to leaching periods,during which physical blocking by loose particle in earlier stage,suspension stoppage in medium term and a combination of chemical sedimentation and mechanical compaction in later period.Permeability dynamics showed that the permeability velocity of coarse particle,fine particle and powder all decreased exponentially with time,and permeability velocity and decline rate for all ore piles were obvious different.
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