青海滩间山金矿选矿工艺改造及生产实践

针对青海滩间山金矿矿石泥化严重，“全泥氰化+浮选”联合工艺指标不理想问题，进行了实验室优化试验研究，并进行了生产实践。结果表明：通过浮选将易浮金矿物、载金矿物及难抑制泥质产物优先富集至最终精矿；降低矿浆浓度，减少泥化矿物团聚对载金矿物的包覆；在确保氰化尾矿除氰效果正常的前提下，采用增加捕收剂加药点，强化对难选金矿物及载金矿物的捕收能力等3种措施，浮选作业金回收率提高了15.40百分点，精矿金品位由7.10 g/t提高至12.29 g/t;现场浮选生产指标稳定，月可增加经济效益约171万元。该工艺改进可为类似矿山生产提供指导。     

锰矿泥絮凝和浮选过程中电化学工艺的研究和应用

锰矿选别过程中产生矿泥,其含锰量达20～25％,尼科波尔和恰图拉矿区的选矿厂用浮选法处理矿泥可补充回收2～3％的锰。浮选指标较低是因为矿泥的矿物成分复杂,锰矿物和脉石矿物的物理化学性质相近,而且矿泥中-5微米的微粒含量较高。     

消除矿泥对汤丹难选氧化铜矿浮选影响的研究进展

基于汤丹矿泥的组成和浮选特性针对矿泥对汤丹难选氧化铜矿的影响进行了长时间的试验研究，主要是通过寻找新的浮选药剂及符合新药剂特性的浮选工艺，使浮选指标获得了改善。     

“洗矿泥二次分级及单独处理”新工艺在焦家金矿通过技术鉴定

一种能使矿石、矿泥分离处理的“洗矿泥二次分级及单独处理”新工艺在焦家金矿研究试验成功。12月16日,山东省黄金局,山东省经委联合组织山东冶金设计院等单位的20名专家、学者,对该项成果进行了技术鉴定。认为,该工艺设计合理、技术先进,达到了国内先进水平。焦家金矿是我国的重点黄金企业。过去,由于洗矿工艺不完善,洗矿泥分级不好,单独处理不具备条件,致使矿泥混入主流程影响操作平衡控制、污染金矿物和载体矿物表面,造成选矿回收     

“洗矿泥二次分级及单独处理”新工艺在焦家金矿通过技术鉴定

一种能使矿石、矿泥分离处理的“洗矿泥二次分级及单独处理”新工艺在焦家金矿研究试验成功.1992年12月16日,山东省黄金局,山东省经委联合组织山东冶金设计院等单位的20名专家、学者,对该项成果进行了技术监定.焦家金矿是我国的重点黄金企业.过去,由于洗矿工艺不完善,洗矿泥分级不好,单.独处理不具备条件,致使矿泥混入主流程影响操作平衡控制、污染金矿物和载体矿物表面,造成选矿回收率低.1991年初,该矿把洗矿工艺的改造作为重点攻关项目,由选矿工程技术人     

少硫化物微细粒浸染型难处理金矿石提金试验研究

陕西某金矿原生矿石为少硫化物微细粒浸染型矿石,金矿物的粒度细小,赋存状态以包裹金为主,且含有砷、碳等有害元素,常规选冶方法金回收率较低。采用强化浮选—精矿压热氧化—氰化浸出提金工艺,金的浮选回收率为82.73%,浮选精矿金的氰化浸出率可达97.27%,金总回收率为80.47%,取得了较好的技术指标。     

金矿浮选的强化脱水

金矿浮选的强化脱水俄罗斯乌拉尔的生产技术研究所进行的金矿浮选富集的研究中，采用了一种ＰＡＡＢ—８３的中性高分子絮凝剂，使浮选富集金矿的脱水得到改善，浓缩机的生产率得到提高。浓缩机生产中的液固比从１．４６降低到１：１。圆盘式过滤机的生产率提高１．８７，...     

新城金矿浮选柱空载试运行成功

近日,新城金矿选矿浮选柱安装完成,并顺利通过空载试运行。该矿井下矿泥具有粒度细,比表面积大、呈碱性、掺杂大量水泥和浓度、粒度及品位变化较大等特点,属于常规难浮选的微细级矿泥。在日常浮选过程中,对工艺流程的影响较大,回收效果不理想。如何最大程度的回收黄金,减少资源浪费,是困扰该矿选矿技术人员多年的一个难题,因此,     

浅谈矿泥对分选稀土的影响

本文对细粒矿泥的性质及矿泥就浮选指标的影响从理论上进行初步地分析、探讨。并以牦牛坪矿为例,对排除矿泥干扰,提高稀土的品位和回收率,降低浮选药剂消耗的途径。     

青海高原地区某金矿闪速浮选可行性研究

青海高原地区某金矿的原矿属于微细粒蚀变岩型金矿,浮选回收率低,调整浮选工艺参数后浮选效果也未得到明显提升。通过考察磨矿分级工艺并分析旋流器底流粒级筛析发现,旋流器的分级效率为43%～60%,且底流存在金的“反富集”现象,部分粒级金品位达到20×10-6以上,这部分已单体解离的有用矿物循环累积于闭路作业中易产生过磨和矿泥二次包裹,从而限制了有用矿物的可浮性,使得回收率难以有效提升。通过在实验室模拟选厂工艺流程,在一段旋流器底流增加闪速浮选作业进行连续闭路试验,闪速浮选精矿产率达到4.07%,精矿品位达到38.31×10-6。旋流器底流中已单体解离的有用矿物通过闪速浮选能达到“早收快收”的效果,减少了这些有用矿物过磨及矿泥二次包裹的几率。旋流器溢流再磨至选矿厂要求的浮选细度进行常规浮选闭路试验,综合回收率由常规浮选工艺下的80.90%提高至83.96%。     

Processing of Alumina-Rich Iron Ore Slimes: Is the Selective Dispersion–Flocculation–Flotation the Solution We Are Looking for the Challenging Problem Facing the Indian Iron and Steel Industry?

Beneficiation of alumina rich iron ore slimes is a major challenge for the Indian iron ore industry. Considering the limits of gravity and magnetic separation processes in the relatively finer size range in terms of achieving adequate separation efficiency, selective flotation (with and without selective flocculation) of iron ore slimes, which is being used commercially in several countries for the beneficiation of iron ores, is worth exploring for the beneficiation of Indian iron ores. Based on the extensive work carried out in our laboratories, we have concluded that the design and development of highly selective reagents to achieve satisfactory separation of hematite and goethite from alumina containing minerals (gibbsite or kaolinite) in the ore and ore slimes, is the key to solving the challenging problem of processing alumina rich iron ores. Accordingly our research work has been focused on finding/designing selective reagents for iron oxide–gibbsite–kaolinite separation based on a molecular modeling computational approach developed by us for the design of mineral processing reagents. We present in this paper the results of our density functional theory computations to evaluate the interaction energies of a wide variety of different reagent functional groups such as carboxylic acid, hydroxamic acid, phosphonic acid, iminobismethyl phosphoric acid, xanthate and starch with hematite, gibbsite and kaolinite surfaces. Among all the reagents investigated so far, starch exhibits the highest selectivity towards the hematite surface with a difference in interaction energy of ~63 kcal/mol between hematite and gibbsite surfaces. Based on our earlier work which indicated polyvinyl pyrrolidone (PVP) to be more selective dispersant for kaolinite compared to conventional sodium silicate and sodium hexametaphosphate, we have investigated selective flocculation–dispersion of natural iron ore slimes (three different samples obtained from three different mines in India) with PVP and starch reagent combination. The results are promising. While the work is still in progress, the implications of our recent results are discussed in the context of the challenging problem of processing of alumina rich iron ore slimes in India.     

Managing clay minerals in froth flotation—A critical review

Clay minerals are widely present in various ore deposits as gangue minerals. The processing of high-clay-content ores is becoming a significant challenge for the mining industry owing to the poor flotation performance caused by the presence of clay minerals. Different types of clay minerals are typically present in ore bodies, and they cause several detrimental effects to flotation that require different treatments. In this article, a comprehensive review of the studies on understanding and mitigating the negative effects of clay minerals in flotation is presented. It starts with a review of the classification and structures of clay minerals commonly occurring in ore deposits and their properties that determine the behavior of clay minerals in flotation. It is followed by a critical review of two main negative effects of clay minerals on flotation, the recent research findings mainly from The University of Queensland group. The first negative effect is the coating of clay minerals on the surface of valuable minerals that decreases the floatability of valuable minerals. The second negative effect is the formation of network structures in the slurry. Depending on the type and strength of the network structure, it can cause either high pulp viscosity or increased gangue entrainment, which reduces the flotation recovery and flotation product grade, respectively. In this section, the mechanisms and key factors behind each negative effect are presented and critically discussed. Then, the approaches and techniques developed to mitigate the different negative effects of clay minerals are reviewed. To conclude, future directions for a more complete understanding of mechanisms and problem solving are recommended.     

伴生型萤石矿浮选研究进展及发展趋势

萤石提取后可以制备氟元素和各种氟的化合物,是一种战略非金属矿物。作为非金属矿物原材料,萤石工业用途十分广泛。中国萤石资源总体储量丰富,但资源禀赋差、品位低、性质复杂,多以伴生型萤石矿床为主,主要脉石矿物有石英、重晶石、碳酸钙等矿物。由于脉石矿物的物化性质与萤石矿相似,对萤石浮选提纯干扰较大,分离困难。本文总结了近年来伴生型萤石矿浮选分离的基础理论、工艺流程、药剂制度等方面的研究进展,总结了伴生萤石矿选矿研究的工艺、技术、药剂方面存在的问题和难点,并对伴生萤石矿选矿发展趋势进行了介绍。     

鞍山式贫赤铁矿不同种类分选尾矿中铁的赋存规律

以齐大山铁矿选矿分厂铁尾矿为例,对重选尾矿、磁选尾矿、浮选尾矿和综合尾矿4种不同种类尾矿的工艺矿物学性质进行对比分析,并对尾矿中铁的可回收性进行评价。研究结果表明,尾矿中铁矿物主要为赤铁矿,脉石矿物主要是石英,有害元素S、P的含量低;尾矿中铁的金属分布率随着粒级的变化,呈两端高、中间低的规律。重选尾矿中铁矿物主要包裹在粗颗粒脉石中,浮选尾矿中铁矿物主要赋存在细颗粒连生体中,磁选尾矿中的铁矿物粒度极细,综合尾矿粒度范围宽、粒度分布极不均匀。采用单一重选和磁选方法对不同种类尾矿进行再选,浮选尾矿指标最佳,重选尾矿次之,综合尾矿最差,磁选尾矿属于不可选。鞍山式贫赤铁矿分选尾矿中铁的赋存状态决定了铁的再回收潜力,可为此类分选尾矿的处理提供理论借鉴。      

某银金矿选矿工艺研究

某银金矿矿石中有用金属甚多 ,相互关系密切 ,银主要以类质同像状态分散赋存在各种硫化矿物及铁矾类、氧化锰矿物中 ,用常规选矿方法难以选别 ,对该矿石的选别工艺流程作了研究 ,认为氧化焙烧—氯化焙烧—氰化工艺流程较适合该矿矿石性质 ,获得的指标最好。     

哈西亚图金矿选矿综合回收利用研究

哈西亚图铁多金属矿床中共生的金矿规模已达中型,可大大提高该矿床的经济效益,对金矿综合回收利用方法的研究显得尤为重要。矿石工艺类型为中硫化物矽卡岩型金矿石,矿石自然类型属混合矿。矿石中主要金属矿物为磁铁矿、磁黄铁矿和黄铁矿,贵金属矿物为自然金和银金矿。通过试验研究,浮选工艺推荐“浮选金-尾矿磁选铁-铁精矿浮硫”方案,浸出工艺推荐“全泥氰化炭浸提金-尾渣磁选铁-铁精矿浮硫”方案。试验结果表明,采用全泥氰化炭浸-磁选铁（浮选除硫）工艺处理哈西亚图金矿石效果最佳。     

西藏某难选铜铅多金属矿石铜铅浮选分离试验研究

西藏某难选铜铅多金属矿石中多种金属矿物密切共生,硫化物之间嵌连关系较为复杂,且含有大量的次生硫化铜及氧化铜矿物,铜铅分选极为困难。针对该矿石特点,进行了铜铅混合浮选—混合精矿分离、优先浮钼、优先浮铜—再浮铅等多种工艺流程探索试验。结果表明:优先浮铜—再浮铅工艺流程可获得较好指标,闭路试验获得铜品位25.01%、铜回收率81.92%、含铅6.71%的铜精矿,铅品位45.89%、铅回收率70.09%、含铜1.69%的铅精矿,实现了矿石中铜铅的有效分离。     

某复杂铜铅锌硫化矿浮选分离工艺研究

新疆某铜铅锌多金属矿属于含铜原生硫化铅锌矿,矿物种类复杂,嵌布粒度不均匀且金属矿物间共生关系密切.针对该矿石的性质特征,为了综合回收矿石中的有价金属,开展了铜铅锌浮选分离试验研究,试验结果表明:采用优先浮选工艺流程,获得铜精矿品位25.13％、铜回收率80.67％;铅精矿品位58.76％、铅回收率88.99％;锌精矿品...     

某难选铅锌矿的选矿试验研究

某铅锌矿石铅锌矿物与脉石矿物共生关系复杂、嵌布粒度较细,矿石比较难磨,锌矿物及脉石矿物比较易浮,采用常规的浮选药剂,铅、锌精矿互含高,精矿品质低。原矿中主要金属矿物Pb品位为0.78%、Zn品位为5.55%;试验研究所确定采用原矿添加石灰磨至-0.074 mm占85%后,铅经一次粗选、一次扫选、四次精选产出铅精矿(铅粗精矿再磨至0.045 mm占95%),选铅尾矿锌浮选,经一次粗选、一次扫选、三次精选产出锌精矿和尾矿的工艺流程。添加新药剂T8、D88、酯-18;最终获得了铅精矿铅品位60.50%、回收率76.26%,锌精矿锌品位50.77%、回收率为87.40%的较好指标。     

低品位多金属铜钴镍矿的开发与研究

为了给某低品位铜钴镍矿石的合理开发利用提供依据,针对该矿石性质,采用全优先浮选工艺流程。浮铜采用CMC纤维素分散并抑制矿泥、漂白粉抑制钴镍矿物及磁黄铁矿、选择性较好的甲基硫氨酯为铜捕收剂、铜粗精矿再磨等工艺;浮钴镍采用碳酸钠调整矿浆p H值、氟硅酸钠活化钴镍矿物、丁基黄药＋C－125为钴镍矿物捕收剂等工艺实验;实验获得含铜18．32％,铜回收率64．27％的铜精矿;含钴0．577％,含镍1．68％,钴回收率54.35％,镍回收率55．28％的钴精矿。此外,还得到含硫38．68％,硫回收率69．90％的硫精矿。