滇东北某高硫铅锌矿流程优化试验研究  

Experimental Study on Process Optimization of a High Sulfur Lead-Zinc Mine in the Northeast Yunnan

作　　者：吕超 谢峰 谢立志 李博 马原琳 Lü Chao;XIE Feng;XIE Lizhi;LI Bo;MA Yuanlin(Kunming Metallurgy Institute Co.,Ltd.,Kunming 650031,China;Yunnan Key Laboratory for New Technology of Beneficiation Metallurgy,Kunming 650031,China;State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources,Kunming 650031,China;Yiliang Chihong Mining Co.,Ltd.,Zhaotong 657602,China)

机构地区：[1]昆明冶金研究院有限公司,云南昆明650031 [2]云南省选冶新技术重点实验室,云南昆明650031 [3]共伴生有色金属资源加压湿法冶金技术国家重点实验室,云南昆明650031 [4]彝良驰宏矿业有限公司,云南昭通657602

出　　处：《金属矿山》2021年第3期110-115,共6页Metal Mine

摘　　要：针对滇东北某铅锌选厂产出铅精矿含锌和硫精矿含铅、锌较高的问题,在对矿石进行工艺矿物学研究的基础上进行了流程优化试验研究。结果表明,该矿石矿物种类复杂,其中方铅矿、闪锌矿的粒度嵌布极不均匀,现场采用"铅硫混合浮选—铅硫混合精矿抑硫浮铅分离—铅硫混合浮选尾矿选锌"的一段磨选工艺流程,嵌布粒度较细的方铅矿、闪锌矿、黄铁矿得不到充分单体解离。本研究提出采用"阶段磨矿、阶段选别"工艺进行流程优化,对铅硫混合精矿再磨再选,在铅硫混合精矿再磨细度为-0.045 mm占70%的条件下,得到Pb品位为61.89%、Pb回收率为85.43%的铅精矿及Zn品位为49.05%、Zn回收率为93.91%的锌精矿。与优化前相比,铅精矿中Pb品位提高1.57个百分点,同时Zn含量下降1.35个百分点,硫精矿中Pb、Zn含量均有所降低,锌精矿中Zn的回收率提高2.43个百分点。目前,现场依据优化工艺完成了选厂改造,采用立式螺旋搅拌磨机进行二段磨矿,生产运营良好,较之前生产指标有一定提高。Aiming at the problem of the high zinc contents in the lead concentrate and high lead-zinc contents in the sulfur concentrate of a lead-zinc concentrator in the northeast Yunnan,the experimental study on process optimization was carried out on the basis of the study on process mineralogy of the ores. The results showed that mineral species of the ores are complex,of which the granularity of galena and sphalerite are unevenly disseminated. The one-stage grinding process of "lead-sulfide mixed flotation,separation of the lead-sulfur mixed concentrate with sulfur inhibition and lead flotation,and zinc selection from the flotation tailings after sulfur-lead selection" was obtained on site. While galena,sphalerite and pyrite with fine-disseminated is not fully monomer dissociated. The study puts forward the process of "stage grinding and stage selection" for process optimization. The bulk lead-sulfur concentrate was regrinded and reselected. In the condition of regrinding fineness of-0.045 mm accounting for 70%,the lead concentrate of lead grade of 61.89% and lead recovery rate of85.43%,and zinc concentrate of zinc grade of 49.05% and zinc recovery rate of 93.91% were obtained enventually. Compared with the indexes before optimization,the lead grade increased by 1.57% in lead concentrate and zinc contents decreased by 1.35% at the same time. The lead and zinc in the sulphur concentrate were lower,and zinc recovery rate of the zinc concentrate increased by 2.43%. At present,the site has completed the transformation of the dressing plant according to the optimized process. The vertical spiral mixing mill has been used for the two-stage grinding. The production operation is good,and the production indexes have been improved compared with the previous production.

关 键 词：铅锌矿 流程优化 阶段磨矿 阶段选别 

分 类 号：TD923[矿业工程—选矿] TD952