双层桨耦合混沌搅拌强化铜渣提取有价金属模拟研究  

Simulation of Extracting Valuable Metal Elements from Copper Metallurgical Slag Enhanced by Chaos Stirring Coupled with Double-Layer Impeller

作　　者：姚钦文 杨凯[1,2] 张晓雪 许威 肖清泰 YAO Qinwen;YANG Kai;ZHANG Xiaoxue;XU Wei;XIAO Qingtai(State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Metallurgical and Energy Engineering,Kunming Univer-sity of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室,云南昆明650093 [2]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《铜业工程》2024年第4期55-64,共10页Copper Engineering

基　　金：国家环境保护矿冶资源利用与污染控制重点实验室开放基金课题(ZZ2023Z6001A);昆明理工大学学科交叉研究专项(KUST-xk2022001)资助。

摘　　要：铜冶炼渣作为火法炼铜生产过程中产生的固体废弃物之一,经常需要大量堆存且难以处理。为了强化铜冶炼渣提取有价金属元素的过程,结合双层刚性组合桨与混沌转速方法,对铜冶炼渣湿法提取有价金属元素工艺过程的固-液混合性能进行水模型研究。结果表明:下层叶轮叶片数量的增加有利于卷起沉底颗粒加快混合过程,但增强复杂的上升流场与均相流场之间的干涉会对固相悬浮产生影响,下层叶轮的上升流场对稳定悬浮时间的影响强于上层叶轮的均相流场,在转速阈值为200 r/min,换速间隔为5 s的Logistic混沌转速条件下,上层桨叶为圆二叶、下层桨叶为圆四叶的搅拌桨对湿法浸出有利,达到稳定悬浮的时间为55.2 s,最多悬浮颗粒数为120粒,混合能耗W、单位混合能耗W*以及单位混合功率P*分别为322.38 J,2.69 J和487.78×10^(-4) J/s,对比各项指标最低值,优化幅度均在10%以上,可在较低能耗下,有效提高铜冶炼渣与浸出液的混合程度,并通过增大反应接触面积,提高有价金属元素的提取效率。Copper metallurgical slag is one of the solid wastes produced by the copper metallurgical process,and a large amount of copper metallurgical slag is deposited and difficult to dispose of every year.To strengthen the process of extracting valuable metal elements from copper metallurgical slag,the solid-liquid mixing performance of the process of extracting valuable metal elements from copper metallurgical slag by a water model in combination with double-layer rigid impeller and chaotic rotational speed method.The results show that increasing the number of blades in the lower impeller is conducive to accelerating the mixing process of the convolution bottom particles,but enhancing the interference between the complex convolutional flow field and the suspended flow field will affect the solid phase suspension.The effect of the convolution flow field in the lower impeller on the stable suspension time is stronger than that in the upper impeller.Under the Logistic chaotic speed condition with a speed change interval of 5 s,the mixing impeller with two-round-blade on the upper blade and four-round-blade on the lower blade has a better effect on wet leaching.The time to achieve stable suspension is 55.2s,the maximum number of suspended particles is 120,the mixing energy consumption W,the unit mixing energy consumption W*and the unit mixing power P*are 322.38 J,2.69 J and 487.78×10^(-4) J/s,respectively.Compared with the lowest value of each group,the optimization range is more than 10%,which can effectively improve the mixing degree of copper metallurgical slag in the leaching solution under low energy consumption,and strengthen the process of extracting valuable metal elements from copper metallurgical slag by increasing the reaction contact area.

关 键 词：铜冶炼渣 固-液两相 混沌搅拌 双层桨 混合能耗 

分 类 号：TD982[矿业工程—选矿] X758[环境科学与工程—环境工程]