离子型稀土多孔注液湿润体单向交汇入渗特征及关系模型  

Single-line interference infiltration characterization and relationship model of wet body for ionic rare earth porous injection

作　　者：王晓军[1,2] 王宇 汪豪 胡凯建 钟文 郭钟群[3] WANG Xiao-jun;WANG Yu;WANG Hao;HU Kai-jian;ZHONG Wen;GUO Zhong-qun(School of Resources and Environment Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Jiangxi Key Laboratory of Mining Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Architectural and Surveying and Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学资源与环境工程学院,赣州341000 [2]江西理工大学江西省矿业工程重点实验室,赣州341000 [3]江西理工大学建筑与测绘工程学院,赣州341000

出　　处：《中国有色金属学报》2023年第4期1266-1277,共12页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51874148,52174113,51904119,52004106);江西省杰出青年人才计划资助项目(20192BCBL23010);江西省青年井冈学者奖励计划资助项目(QNJG2018051);江西省“双千计划”资助项目(JXSQ2019201043);赣州市创新领军人才计划资助项目([2020]60)。

摘　　要：离子型稀土矿主要采用原地浸矿法实施资源回收,合理设置注液孔网可有效提高浸矿均匀性和浸矿液渗流速度。而合理孔网参数设定与多孔注液入渗过程中湿润体和湿润峰变化特征密切相关。对不同间距单向交汇入渗试验和单孔入渗试验进行了对比和分析。结果表明:湿润体交汇前,两种试验的湿润峰运移曲线基本重合,湿润体形状近似为八分之一椭球体;湿润体交汇后,交汇处湿润峰比注液孔正下方湿润峰运移快,湿润体形状逐渐变成椭圆柱体,交汇作用明显加快注液孔正下方湿润峰的运移,提高浸矿速度和浸矿的均匀性。交汇处和注液孔正下方湿润峰运移距离与入渗时间的关系曲线符合幂函数变化规律。在入渗过程中,湿润体体积和累计入渗量有明显的线性关系,且注液孔间距越小,湿润体含水率越高。基于Green-Ampt模型和质量守恒定律推导了单向交汇入渗条件下湿润峰运移距离与入渗时间关系模型,模型与试验结果吻合度高。Ionic rare earth ore mainly adopts in-situ leaching method to implement resource recovery,reasonable setting of liquid injection hole network can effectively improve the leaching uniformity and leaching liquid flow rate.And the reasonable hole network parameter setting is closely related to the change characteristics of wet body and wetting front during the infiltration of porous injection fluid.The single-line interference infiltration experiment with different spacings and single-hole infiltration experiment were compared and analyzed.The results show that,before the interference infiltration of the wet body,the migration curves of the two wetting fronts basically overlap,and the shape of the wet body is approximately one-eighth ellipsoid.After the interference infiltration of the wet body,the wetting front migration of interference is faster than that just below the injection hole,and the wet body shape gradually becomes cylindrical.And the interference can obviously accelerate the wetting front migration just below the injection hole,improving the leaching speed and the uniformity of leaching ore.The relationship curves between the migration distance and infiltration time of the wetting front at the interference and just below the injection hole conform to the law of power function.During the infiltration process,there is an obvious linear relationship between the wetted soil volume and the cumulative infiltration volume,and the smaller the spacing,the higher the water content of the wetted soil.Based on the Green-Ampt model and the conservation of mass,the relationship model between the migration distance and infiltration time of wetting fronts under the single-line interference infiltration is derived,the model is in good agreement with the experimental results.

关 键 词：湿润峰 单向交汇作用 离子型稀土 零通量面 计算模型 

分 类 号：TD865[矿业工程—金属矿开采]