电位调控快速浮选技术在铅锌矿中的应用实践  

Application of potential-controlled rapid flotation technology in lead-zinc mine

作　　者：王洋 赵彦杰 左可胜[2] 张志 范松 吴丽丽 王晨 WANG Yang;ZHAO Yanjie;ZUO Kesheng;ZHANG Zhi;FAN Song;WU Lili;WANG Chen(Northwest Shaanxi nonferrous lead and Zinc Group Limited,Baoji 721000,Shaanxi,China;School of Earth Science and Resources,Chang′an University,Xi′an 710000,China;Management Committee of Baoji Hi-tech Industry Development Zone,Baoji 721000,Shaanxi,China)

机构地区：[1]陕西西北有色铅锌集团有限公司,陕西宝鸡721000 [2]长安大学地球科学与资源学院,西安710000 [3]宝鸡市高新技术产业开发区管理委员会,陕西宝鸡721000

出　　处：《矿冶》2024年第2期217-224,共8页Mining And Metallurgy

摘　　要：电位调控快速浮选技术主要是通过调节矿浆电位,改变不同矿物的可浮性,提高选矿药剂的活性,提高浮选速度,缩短浮选时间,实现有用矿物与脉石矿物的快速分离浮选。以陕西东塘子铅锌矿工业应用为例进行阐述。该矿应用电位调控快速浮选技术前,处理能力为1000 t/d的选矿厂采用两个独立的磨浮系列进行生产,选矿成本较高;药剂制度采用重拉重压的方式,铅精矿质量不好、铅锌回收率尚有提升空间。为有效降低选矿成本、提高铅精矿质量及铅锌回收率,该矿引进电位调控快速浮选技术,对其中一个浮选系列进行了设备改造,提高该浮选系列的过浆能力;将石灰添加进球磨机,通过石灰将矿浆pH值调节为12.5,使矿浆电位降低并稳定在-170 mV;同时,应用乙硫氮、Z-1浮选剂等浮选药剂,并对相应的药剂制度进行调整优化后进行了工业应用。工业应用非常成功,实现了铅锌快速分离浮选,在产能不变的情况下,浮选作业由两个系列改为单系列运行,浮选时间由77.91 min缩短到47.66 min;取得的效果也非常明显,铅精矿主品位由56%提高到65%,铅锌回收率分别提高了0.16和0.64个百分点;停用一个浮选系列,减少装机容量400 kW,减少浮选岗位人员8名;降低药剂成本2.19元/t;年产生经济效益500余万元,经济效益和社会效益可观。The potential controlled rapid flotation technology mainly adjusts the slurry potential,which can influence the floatation performances of different minerals,improve the activity of beneficiation agents,increase flotation speed,shorten flotation time,and achieve the goals of rapid separation flotation of useful minerals and gangue minerals.This paper taking the industrial application of Dongtangzi lead-zinc mine in Shaanxi as an example.Before the application of potential controlled rapid flotation technology,a beneficiation plant with a processing capacity of 1000 t/d was used,which consists of two independent grinding and flotation series for production,resulting in high beneficiation costs,besides the processing system adopts heavy pulling and pressing method,while the quality of lead concentrate is poor and there is still room for improvement of the lead-zinc recovery rate.In order to effectively reduce the cost of mineral processing,and improve the quality of lead concentrate and lead-zinc recovery rate,the mine has introduced potential controlled rapid flotation technology and carried out equipment transformation on one of the flotation series to improve its slurry capacity.Then the mine added lime to the ball mill and adjusted the pH value of the slurry to 12.5,therefore the slurry potential canbe decreased and stabilized it at-170 mV.At the same time,flotation reagents such as ethionium nitrogen and Z-1 flotation agent were applied,and the corresponding reagent system was adjusted and optimized for industrial application.The industrial application was very successful,achieving the goal of rapid separation and flotation of lead and zinc.Under the same production capacity,the flotation operation was changed from two series to a single series,and the flotation time was shortened from 77.91 min to 47.66 min.The results are also very noble,the main grade of lead concentrate increased from 56% to 65%;the lead and zinc recovery rates increased by 0.16 and 0.64 percentage respectively;a flotation series has been

关 键 词：铅锌矿 电位调控 电化学浮选 快速浮选 矿浆pH值 矿浆电位 药剂制度 浮选时间 

分 类 号：TD952[矿业工程—选矿] TD923