CMC在硫化矿浮选中的抑制作用及其抑制性能影响因素

抑制剂在浮选过程中对矿物的选择性分离起着重要作用.羧甲基纤维素(CMC)是一种高效无污染的选矿抑制剂,广泛应用于典型硫化矿的选择性浮选.尽管过去研究者对CMC在选矿中的应用进行了大量研究,但CMC在硫化矿浮选中的抑制作用及抑制效果的影响因素并未进行系统地总结.本文综述了CMC对方铅矿、黄铜矿、黄铁矿等硫化矿以及硫化矿浮选中含镁硅酸盐脉石矿物的抑制作用机理,总结了在硫化矿浮选中,CMC自身性质、矿浆p H、其他金属离子的存在、药剂用量、药剂添加顺序等因素对CMC抑制性能的影响,旨在为硫化矿高效浮选分离提供参考.     

三种含钙矿物抑制剂研究进展及机理

白钨矿与萤石、方解石等含钙矿物表面性质相似,可浮性相近,在浮选体系中难以实现白钨矿与它们的高效分离和有效回收,因此在研究白钨选矿浮选捕收剂的同时,开展对含钙脉石矿物高效分离抑制剂的研究至关重要。文章综述了近年来白钨矿与含钙脉石矿物分离抑制剂的研究现状,详细阐述了多种无机抑制剂和有机抑制剂的抑制机理和应用,并结合当前白钨矿与含钙矿物抑制剂的研究进展,认为开发对含钙矿物具有高效抑制性能的药剂引入特性基团增强抑制剂的亲水性,能达到提高其选择性的目的,最后探讨了抑制剂研究的新方向。     

萤石矿低温浮选高效捕收剂的研究与选矿应用

为解决萤石矿浮选捕收剂油酸在常温下水溶性及分散性差、能耗高的问题,本项目以内蒙古某萤石矿为试验研究样品,进行萤石矿低温浮选药剂的研发,研制的新药剂YS103能够在矿浆温度5-10℃条件实现对萤石矿的有效捕收及萤石与杂质矿物的有效分离。对新药剂YS103开展了浮选性能研究、小型试验及工业应用试验,用YS103替代现场使用的油酸,在无需加温的情况下均取得了良好的选矿指标。     

某钨尾矿综合回收低品位萤石浮选试验研究

某钨尾矿有用矿物萤石嵌布粒度细,萤石含量低,单体解离难,石英、方解石等脉石矿物含量高,试验研究了该钨尾矿萤石和脉石矿物的浮选分离行为,通过条件试验,选择HY为萤石捕收剂,酸化水玻璃+HF为脉石矿物抑制剂,研究最终确定了一段一次粗选.七次精选工艺流程.结果表明:在钨尾矿含萤石8.12%的条件下,闭路试验获得了精矿CaF₂品位95.36%,回收率61.39%的选矿指标,实现了资源的综合回收.      

钨矿浮选残余药剂对伴生萤石浮选的影响研究及实践

钨、萤石共伴生资源浮选过程中,前端钨矿浮选作业对后续萤石浮选必然会存在一定影响,特别是残余药剂.针对钨浮选尾矿中萤石与方解石、石英浮选分离难题,通过单矿物浮选试验,研究了油酸钠作用下钨矿选别过程中硝酸铅和苯甲羟肟酸及其配合物对尾矿中不同矿物浮选的影响.结果表明,铅离子和铅离子与苯甲羟肟酸形成的配合物(Pb-BHA)是影...     

四川某地铂镍矿选矿试验的研究

本文介绍铂镍矿的选矿试验研究。根据该矿石性质特点,拟定了细磨－混合浮选－铜镍分离的选矿工艺流程,强化对易浮脉石矿的的有效抑制,获得良好的铜镍分选指标,同时伴生贵金属铂族元素和金银等均得到的综合回收。     

从某硫化矿浮选尾矿中回收白钨的研究

对某硫化矿浮选尾矿采用石灰浮选法粗选，浓浆加温搅拌法精选浮选白鸽，成功地进行了白钨矿与萤石、方解石等脉石矿物的分离，获得了国标一级白鸽精矿，钨总回收率达82.93％。     

伟晶岩型锂辉石矿浮选研究综述

基于对伟晶岩型锂辉石矿资源现状,锂辉石矿中主要组成矿物的理化性质与可浮性,锂辉石矿浮选基础研究和工艺现状的分析和总结,指出了伟晶岩型锂辉石矿浮选过程中的主要影响因素及所面临的主要问题。主要影响因素包括:磨矿细度、矿泥及易浮杂质、水质影响、搅拌强度、温度影响和合理用药;所面临的主要问题表现在:锂辉石矿中主要矿物浮选行为的研究有待加强、浮选捕收剂的捕收性和浮选分离抑制剂的选择性有待进一步提高、矿泥的浮选行为及其对锂辉石浮选行为的影响以及矿泥高效处置技术的研究有待加强、高海拔地区锂辉石矿浮选行为及其影响因素有待加强研究。提出锂辉石矿浮选应着重对锂辉石浮选动力学、锂辉石浮选药剂构效关系、泥质矿物浮选行为及对锂辉石浮选行为影响等方面的研究。     

高分子抑制剂在钨伴生硫化矿浮选分离中的影响

我国钨矿大量伴生有铜、铅、锌、钼、铋等有价金属,这类资源在综合回收利用时普遍存在浮选分离效果差,选矿回收率低的问题.通过浮选试验,研究了四种高分子有机抑制剂对方铅矿、闪锌矿两种钨伴生硫化矿物使用KMnO4氧化前后浮选的影响.浮选试验结果表明:单用高分子有机抑制剂对钨伴生硫化矿的浮选分离效果较差,而引入KMnO4后,高分...     

提高陕西某镍矿回收率的选矿试验研究

陕西某镍矿矿物组成和结构构造复杂,其中脉石矿物种类较多,主要为滑石、蛇纹石、菱镁矿、白云石、高岭石、石英、角闪石和绿泥石等。镍主要以镍黄铁矿的形式存在。除黄铁矿粒度较粗外,其它泥质矿物粒度较细,矿石中滑石和蛇纹石等脉石矿物可浮性较好,不易与硫化物分离。针对该矿石的性质特点,进行了选矿工艺流程及药剂制度的试验研究。试验结果表明:对该矿石采用磨矿-浮选预先脱泥-浮选矿砂中镍的工艺流程可获得镍品位为5.74%、回收率为73.03%的选矿指标。     

我国西南部某低品位钨多金属矿工艺矿物学研究

某钨多金属矿赋存于辉石-石榴石夕卡岩中,以有用金属种类多,钨与铜、铋、钼等伴生,各有用金属品位均偏低为特征,其脉石矿物组合也较为特殊,大量的普通辉石和钙铁榴石,并伴有方解石、萤石等高钙矿物。本文从工艺矿物学的角度,研究该低品位钨多金属矿的矿物学特征与选矿的关系,重点查明该矿石矿物组成、钨、铜、铋、钼的赋存状态,为制定合理的选矿工艺流程提供充分的依据,对此类矿石的开发利用具有重要意义。     

难选氧化铜矿的浮选试验研究

针对某难选氧化铜矿石氧化率和结合率高，原矿品位低，脉石矿以钙镁含量高的碳酸盐碱性为主的特点，考查了不同的捕收剂回收氧化铜的效果，表明采用提高磨矿细度。组合捕收剂，深化活度，强化连生体和细粒铜矿物的有效选别，在保证铜精矿品位波动不大的情况下，提高选矿回收率7．82％，选矿工艺流程简单易行，具有应用价值。     

某钼铜硫多金属矿钼铜混合浮选分离研究

对某铜钼硫多金属矿进行了选矿试验。采用钼铜混合浮选再分离工艺流程,在原矿含 Mo 0．17％、Cu 0．137％、S 5．36％、Pb 0．067％的条件下,获得了含钼49．26％、钼回收率82．66％的钼精矿及含铜15．45％、铜回收率53．52％的铜精矿。实现了钼铜硫矿物与脉石及钼铜硫矿物之间的有效分离,获得了良好的技术指标。     

Microbes Assisted Mineral Flotation a Future Prospective for Mineral Processing Industries: A Review

The latest advancements in mineral biotechnology developed environmental benign microbial flotation processes for mineral beneficiation. Several studies were conducted to evaluate the microbes and microbial metabolites as flotation reagents for separation of gangue materials from valuable minerals. The available scientific literatures on microbial flotation process suggest that, interactions of minerals with cells of certain bacteria and microbial metabolites have a significant effect on their surface properties. As a consequence, bacterial cells belong to genera Acidithiobacillus, Leptospirillum, Mycobacterium, Staphylococcus, and Bacillus, etc., and microbial metabolites such as bio-surfactants, extracellular polymeric substances (EPS) and nucleic acid have been used as collectors and surface modifiers in the mineral flotation process. The characteristic properties of the microbial surfactants such as their abilities to lower surface tensions and foaming capacity prompted their application as frother in mineral flotation process. To date, microbial flotations have primarily studied in laboratory scale; however, there is ample scope to expand this eco-friendly process for mineral processing industries. The current review addresses the recent developments and applications of microorganisms and bio-molecules in mineral flotation processes.     

Developments in Selective Flotation of Complex Copper-Lead-Zinc

Sulphur dioxide has been successfully used as a depressant for galena and sphalerite in selective copper flotation of complex fine-grained sulphide ores. Dosage of the gas demands care and that is why it is not used as often as it could be. The sulphur dioxide gas has been replaced by a solution of sulphur dioxide forming salt with improved selectivity. Easy dosage of the reagent and use of selective copper mineral collectors has demonstrated better process control with upgraded products. On an Australian Cu-Pb-Zn ore the key to improved process was the finding that gangue minerals of the ore have buffer capacity to allow the stagewise addition of acidic reagent solution and still maintain the narrow pH range of selective separation of chalcopyrite and galena even with simple manual process control.

On a Russian Cu-Pb-Zn ore good selectivity against galena and sphalerite was obtained in the flotation of bornite and chalcopyrite as a high grade copper concentrate. Stagewise grinding-flotation with three grinding steps were used to obtain reasonable liberation of copper minerals and to maintain the optimum selectivity.     

陕西某低品位铜钼矿选矿试验研究

The copper grade the low-grade copper-molybdenum ore in Shaanxi is 0.32% and the molybdenum grade is 0.048%.The copper and molybdenum minerals mainly exist in the form of sulfide ore. The properties are complex that there are many kinds of minerals in the ore, which are closely distributed and fine dissemination size. According to the properties of the ore, the technological process of bulk flotation and separation of copper and molybdenum was adopted in the experiment. With lime as regulator and reagent L03 as collector, the mixed concentrate of copper and molybdenum was obtained by the bulk flotation which flow-sheet is one roughing, three refining and two scavenging process. Then regrinding the mixed concentrate, use sodium sulfide as inhibitor of copper minerals, sodium silicate as slurry dispersant and inhibitor of silicate gangue minerals , kerosene as collector, can separate copper and molybdenum with the flow-sheet which one roughing, five refining and three scavenging. The copper concentrate with copper grade of 18.82% and copper recovery rate of 85.35% and molybdenum concentrate with molybdenum grade of 47.14% and molybdenum recovery rate of 79.24% were obtained by the final closed-circuit flotation test process, the indicator is nearly ideal.     

某微细粒难选铁矿选矿试验研究

某铁矿为微细粒弱磁性铁矿,有用矿物主要是赤铁矿和磁铁矿,脉石矿物主要是石英．在磨矿中产生许多矿泥,影响其可浮性．采用重选、磁选、浮选、选择性絮凝和磁化焙烧等工艺处理该矿石．结果表明,采用选择性絮凝脱除矿泥,阳离子反浮选工艺最合适．在原矿含铁45．27％的情况下,获得铁品位59．67％,回收率78．84％的铁精矿．     

云南某赤铁矿选矿工艺研究

云南某赤铁矿金属矿物以赤铁矿为主,另含少量磷铁矿。对该矿石进行了选矿工艺试验研究。研究结果表明：采用全反浮选工艺流程可使该矿石获得较好的分选指标。     

江西宜丰圳口里低品位锂瓷石矿选矿试验研究

锂是实现“碳达峰碳中和”战略目标的重要支撑原料,江西宜春地区锂云母资源丰富,并成为国内重要的锂电原材料供应基地。随着采选规模的扩大,低品位难处理锂瓷石资源的开发利用问题亟需解决。以宜丰圳口里矿区低品位锂瓷石矿为研究对象,开展了工艺矿物学研究与选矿试验研究,结果表明,该类矿石中云母矿物晶格中钾含量较高（9.78%）,而Li₂O理论品位较低,仅1.72%左右,表现出白云母/绢云母性质;此外,矿石存在一定风化蚀变现象,不利于锂云母矿物浮选分离。针对该矿石的阴阳离子组合捕收剂JYM具有良好的选择性与捕收能力,在该捕收剂体系下,采用脱泥-浮选工艺,经“一粗两精两扫”工艺流程,获得了Li₂O品位1.75%、回收率80.70%的选别指标,锂云母与脉石实现了良好的浮选分离。