(1. 北京科技大學 土木與環(huán)境工程學院，北京 100083；
2. 北京科技大學 金屬礦山高效開采與安全教育部重點實驗室，北京 100083；
3. 云南銅業(yè)集團公司，昆明 650051)
摘 要: 通過室內實驗分析高泥礦堆滲透性影響因素，探明入堆顆粒粒徑、顆粒結構、泥質對浸堆滲透性的影響規(guī)律。結果表明：-1 mm的粒級的物料對浸堆滲透性具有惡化作用，去除后浸堆的滲透系數(shù)可增加19~47倍；入堆顆粒粒徑與礦堆滲透系數(shù)呈二階指數(shù)函數(shù)關系，當粒徑小于10 mm時，滲透系數(shù)隨粒徑增大而緩慢增加；當粒徑大于10 mm時，滲透系數(shù)隨著粒徑的增大而迅速增加。最后，提出采用水洗-分級工藝將-1 mm粒級物料進行槽浸和攪拌浸出，將+1~-5 mm和+5~-25 mm的物料進行分級筑堆、分區(qū)噴淋的堆浸方式。采用此工藝后，浸堆的滲透系數(shù)增加為原礦的8~50倍，綜合浸出率由不到10%提高到63.98%，使高含泥氧化銅礦得到成功堆浸。
關鍵字: 高含泥；低滲透性；堆浸；水洗-分級；浸出率
（1. School of Civil and Environment Engineering,
University of Science and Technology Beijing, Beijing 100083, China;
2. Key Laboratory of High-Efficient Mining and Safety of Metal, Ministry）
Abstract:The factors which affect the permeability of high-clay heap were analyzed. The laws of permeability affected by particle nature, particle structure and gain size were discussed through room experiments. The results show that the ore particles with size of -1 mm play worsen effect on permeability. After removing these particles, the coefficient of permeability will increase by 19~47 times; exponential function relation is also found between particle diameter and permeability coefficient of permeability. When the size is less than 10 mm, the permeability coefficient increases slowly; when the size is bigger than 10 mm, the permeability increases quickly. Finally, the craft of wash-classification is brought, which is consisted of that the ore particles with size of ?1 mm are in tank leaching and agitation leaching, the ore particles with sizes of +1~ -5 mm and +5 ~ -25 mm are in heap leaching with classification dump and partition liquid arrangement. After the craft is used, the permeability coefficient of heap is 8~50 times as that of crude ore, and the comprehensive leaching rate increases from 10% up to 63.98%. The high-clay copper oxide ore is leached successfully.
Key words: high-clay; poor permeability; heap leaching; washing-classification; leaching rate
