CPT浮选柱精选小型分流工业试验研究

针对浮选柱对微细粒矿物浮选和提高精矿品位方面的优越性,结合大红山铜矿铜浮选工艺流程简单灵活性,在大红山铜矿二选厂采用从生产流程中分流出一部份矿浆进行CPT浮选柱试验,结合精选尾矿MLA测试研究浮选粗精矿再磨和不磨两种情况下取得的技术经济指标,得到粗精矿不磨流程浮选柱与浮选机相比,精矿品位提高了1.00个百分点；作业回收率提高了0.45个百分点。粗精矿再磨流程浮选柱与浮选机相比,精矿品位提高了3.62个百分点；作业回收率提高了0.74个百分点。     

某难选铜铁矿综合利用工艺研究

研究了某铜铁矿矿石性质,进行了铜矿物粗选、扫选、精选条件及铁矿综合回收试验研究。结果表明:采用铜硫混合浮选、三次精选、四次扫选,铜硫分离一次粗选、三次精选、一次扫选工艺,可以获得铜精矿铜品位16.93%,回收率69.81%;硫精矿硫品位32.80%,回收率53.23%的选矿产品。浮选尾矿进行再磨除硫,获得的铁精矿品位67.49%,全铁回收率61.12%。     

浮选柱优化难选金矿流程的探索性试验研究

针对某选矿厂改造中存在的厂房空间有限、浮选机浮选时间不足的问题,展开多作业段的浮选柱适应性试验研究,以期在有限的空间条件下延长浮选时间,提升选矿效率。试验分别在中矿再磨再选、尾矿再选、三段给矿选别和精矿段四个作业段进行了试验研究。结果表明中矿再磨再选浮选柱流程可获得较高的精矿品位,但回收率较低;而浮选柱在尾矿再选试验中能够显著提升金精矿品位;给矿和精选作业段的试验中,浮选柱也能明显地提升金的回收率或是精矿品位。改造中可将浮选柱与浮选机组成"柱—机联合配置",从而提升选矿厂整体选别效率。     

西藏玉龙铜矿硫化铜矿石选矿试验研究

西藏玉龙铜矿含铜1.6%~1.8%,含硫7.0%~8.5%,矿石性质复杂,易泥化脉石含量高,属于难选矿石。为实现矿石中铜矿物的高效回收,简化现场工艺流程,采用铜优先浮选工艺处理该矿石,即以BK-404作铜矿物的捕收剂,石灰作黄铁矿的抑制剂,在矿浆p H值=9的低碱条件下分步粗选两次,粗精矿不再磨精选三次。试验结果表明,在原矿含铜1.66%的条件下,采用该工艺小型闭路试验可获得含铜20.63%、铜回收率82.24%的铜精矿。铜优先浮选工艺试验指标良好,减少精选浮选机配置容积,减少铜金属循环量和流失量,使铜矿物得到很好的回收,为现场的流程改造提供理论依据。     

某低品位金铜矿石浮选柱应用试验研究

某低品位金铜矿石含铜0.46%、金0.18 g/t,矿石中铜矿物主要以蓝辉铜矿、辉铜矿、铜蓝、硫砷铜矿等次生铜矿物存在,其可浮性好但容易过磨,造成浮选时细粒级损失较高,试验采用浮选柱+浮选机联合选别与单独采用浮选机相比,其它指标相当的情况下,铜精矿品位提高9.6%,硫精矿回收率提高9.23%,试验表明浮选柱对提高精矿品质、简化流程和强化细粒级回收方面具有较为明显地优势。     

某低品位金铜矿石浮选柱应用试验研究

某低品位金铜矿石含铜0.46%、金0.18 g/t,矿石中铜矿物主要以蓝辉铜矿、辉铜矿、铜蓝、硫砷铜矿等次生铜矿物存在,其可浮性好但容易过磨,造成浮选时细粒级损失较高,试验采用浮选柱+浮选机联合选别与单独采用浮选机相比,其它指标相当的情况下,铜精矿品位提高9.6%,硫精矿回收率提高9.23%,试验表明浮选柱对提高精矿品质、简化流程和强化细粒级回收方面具有较为明显地优势。     

CCF逆流接触充气式浮选柱在冬瓜山铜矿选矿中的试验研究

针对冬瓜山铜矿铜精选系统存在的原矿品位较低或矿石中蛇纹石等易浮脉石含量增多时,现有工艺难以产出合格铜精矿(品位小于20%)的问题,结合CCF浮选柱的分选原理及分选优势,进行了两个阶段的CCF浮选柱铜精选的半工业试验。半工业试验结果表明,在冬瓜山铜矿粗精矿(品位大于10%)的生产条件下,采用浮选柱一次精选即可分选出铜精矿品位大于21%的铜精矿产品,且选别指标要优于现场生产,浮选柱选别出的精矿中贵金属金和银的含量比现场铜精矿中的分别高0.5和12.7 g/t,CCF浮选柱对细粒级矿物具有很好的选别效果,适合用于冬瓜山铜矿铜精选作业,且能在提高铜精矿品位的同时实现资源的高效回收利用。     

某低品位铜钼矿工艺矿物学及选矿工艺研究

青海某铜钼矿含钼0.084%,铜含量0.067%。工艺矿物学研究表明,原矿中钼主要以辉钼矿形式存在,铜以黄铜矿、辉铜矿及斑铜矿等形式赋存。针对矿石性质,结合探索实验,最终采用铜钼优先浮选工艺处理该矿石。在磨矿细度为-74μm 70%条件下,经一次粗选一次扫选两次空白精选得钼粗精矿,钼粗精矿再磨后经三次精选获得了钼品位50.21%、回收率85.21%的钼精矿;钼浮选尾矿用硫酸铜活化后经一次粗选一次扫选四次精选,获得了品位15.32%、回收率54.92%的铜精矿,实现了有价元素的综合回收。     

某铜矿选铜工艺优化研究与生产实践

紫金矿业集团股份有限公司某铜矿选矿厂由于工艺流程简单,导致铜精矿品位较低且不稳定。为了实现现场铜精矿指标的改善并稳定生产过程,在分析了矿石性质和现场磨矿产品中硫化矿物解离情况的基础上,对发现的现场工艺问题进行了研究和改造。结果表明,在铜精选作业前增设搅拌作业,以强化调整剂与铜粗精矿的作用时间;同时将原三槽浮选机进行1次精选改为2次精选(精选1作业用2个浮选槽,精选2作业用1个浮选槽),可在原矿铜品位从0.457%明显下降至0.358%的情况下,将铜精矿铜品位从20.40%提高至25.54%,铜回收率小幅下降主要由原矿铜品位下降造成。此次改造每年可为企业创造1 374.33万元的经济效益。该项技改成果具有显著的推广应用价值。     

柱-机联合流程处理某铅锌矿石试验

为确定浮选精选作业用CFC浮选柱替代机械搅拌浮选机的效果,对Pb、Zn品位分别为1.92%和1.68%的某铅锌硫化矿石的机械搅拌浮选机粗精矿进行了1次精选效果对比试验,并进行了柱-机联合流程开路和闭路试验。结果表明:(1)CFC浮选柱1次精选铅、锌的选矿效率较机械搅拌浮选机分别高9.84、11.86个百分点,与机械搅拌浮选机相比,铅锌精选作业次数至少可分别减少1次。(2)在一段磨矿细度为-0.074 mm占70%,铅粗精矿、锌精矿1再磨细度均为-0.038 mm占70%的条件下,采用柱-机联合开路试验流程(仅最后1次精选用CFC浮选柱)处理矿石,可获得铅品位为62.35%、含锌4.25%、铅回收率为77.78%的铅精矿,以及锌品位为59.35%、含铅1.32%、锌回收率为49.86%的锌精矿;采用柱-机联合闭路试验流程处理矿石,可获得铅品位为53.66%、含锌4.60%、铅回收率为94.74%的铅精矿,以及锌品位为52.86%、含铅1.45%、锌回收率为79.60%的锌精矿。(3)采用柱-机联合流程处理矿石,不仅可取得理想的生产指标,而且可简化流程、减少设备数量和场地面积、节能降耗、便于生产管理。     

浮选机－浮选柱联合分选某硫铁矿尾矿试验研究

以广东云浮某硫铁矿选矿厂的浮选尾矿为样品,采用浮选机-浮选柱联合分选工艺进行分选,充分利用浮选机和浮选柱两种设备的特性,在保证粗颗粒回收的同时强化了微细颗粒的回收。对原矿样品的粒度和硫含量进行了分析,结果表明硫主要分布于+74 μm和-10 μm两个粒级中。通过浮选机两次粗选、两次扫选、粗精矿再磨后两次精选流程的闭路试验,可从含硫6.91%的浮选入料中获得品位为33.42%、回收率为63.82%的硫精矿。在相同的药剂用量下,通过浮选机-浮选柱联合分选,可获得品位为32.68%、回收率为70.84%的硫精矿。粒级回收率分析表明,与单一浮选机工艺相比,浮选机-浮选柱联合分选后,-54 μm细粒级的回收率明显提高,尤其是-20 μm粒级,回收率提高了将近10个百分点。     

Turpentine-based flotation agents in copper-nickel ore flotation

The authors present experimental data on synthesis of new flotation agents, based on the renewable vegetal resource, and their applicability to floating copper-nickel ores. It is verified experimentally that the new flotation agents efficiently improve extraction of copper minerals.     

浮选回路配置的浮选动力学探讨

本文从浮选动力学的角度,对选矿厂浮选回路配置进行了探讨.认为采用目前性能先进的短柱型浮选机,单排配置槽数少,有利于矿物浮选性能的改善.     

铜硫浮选分离药剂的研究现状

重点叙述了近些年来铜硫分离的捕收剂和抑制剂的研究成果.指出高效的硫化铜矿捕收剂以及有效的黄铁矿抑制剂是铜硫分离成功的关键,同时对它们的作用机理进行了简要的阐述.     

Two-stage fast flotation of coal tailings using reflux flotation

Low pulp density and low grade slurries in the coal and minerals industries are discharged as waste to tailings dams, incurring significant losses of valuable particles. This paper investigates the rapid processing and cleaning of hydrocyclone overflow coal slurry using two laboratory scale Reflux Flotation Cells in series as a means to economically beneficiate low quality tailings streams. The Reflux Flotation Cell incorporates a novel arrangement of inclined channels to enhance bubble-liquid segregation, enabling extremely high gas rates and liquid rates per unit of vessel area. Hence, in the first stage, fast flotation is employed to rapidly recover fine coal particles using a feed flux of 11.4 ± 0.5 cm/s, up to an order of magnitude increase in the throughput rate over conventional flotation systems. First stage product was then sent to a second stage for counter-current washing using fluidisation wash water to produce a fully deslimed product, having ash percent in agreement with the minimum ash attainable using flotation as determined through tree flotation analysis. The results demonstrate the potential for two-stage Reflux Flotation to deliver high throughput at a high separation efficiency from low quality slurry, with a fivefold reduction in the required vessel footprint, thus overcoming the principal economic deterrent of having to install banks of large-scale flotation cells.     

Bubble spargers in column flotation: Adaptation to precipitate flotation

The limiting factor for metal-organic precipitate flotation in a column is the level of aggregate stability under the turbulence created by the rising bubbles. The hydrodynamic conditions in a 75 mm diameter pilot column were optimised by using different bubble spargers (Microcel, Flotaire, Imox) and by varying the gas flow rate into the bubble sparger, feed flow rate in the column, type and concentration of frother and recirculating pump flow rate. With the bubble spargers used, the average bubble diameter ranges from 0.30 and 1.10 mm, with up to 25% gas hold-up. The parameters influencing average bubble diameter are the superficial gas velocity and the recirculating pump flow rate. For optimal concentrations (10 to 20 mg/1), the type of frother has a negligible role.Strong interaction occurs between superficial gas and feed velocities and recirculating pump flow rate for bubble size control. The optimum operating conditions must accordingly be maintained to prevent carryover of small bubbles into the recirculating pump or the purified solution. An example of the Mo precipitate flotation confirms the assumption made for the effect of bubble size and dissipation energy on the separation results. reserved.     

充气量和起泡剂对喷射式浮选机浮选效果的影响研究

为更有效的利用喷射式浮选机,利用自制的喷射式浮选装置,以可燃体回收率作为浮选指标,研究了浮选中充气量和起泡剂浓度对精矿产率及灰分的影响规律,结果表明：在矿浆浓度和起泡剂浓度不变的情况下,充气量存在一个值为400L/h的临界参数,小于临界值,浮选精矿产率随充气量的增大而增加,大于临界值,效果变差|起泡剂浓度临界参数为0.1mmol/L,在此浓度下,精矿产率高且灰分较低。因此,在喷射式浮选机工作过程中,控制充气量和起泡剂浓度,是调节精矿产率的重要方式。     

Fundamental properties of flotation frothers and their effect on flotation

Froth flotation process requires the use of frothers. These important flotation agents are commonly characterized as either “selective” or “powerful” and are chosen following general guidelines and verification by laboratory and/or pilot plant tests.Fundamental properties of the flotation frothers have been extensively studied over the last few years. These studies have led to the development of standardised procedures to characterise frothers in terms of their ability to reduce bubble size and to increase foam stability.In this research project, the performance of five frothers in flotation of coal is evaluated and related to the fundamental properties of these agents. Since the recovery of water in the concentrate is closely related to the non-selective transport of solid particles by entrainment, the tested frothers are also assessed in terms of their ability to promote the transport of water towards the froth collection zone, both in absence and in presence of solids.     

Short-cut method for flotation rates modelling of industrial flotation banks

The knowledge of the distributed performance of a flotation bank, consisting of a number of cells in series, is a key factor for different purposes such as process design, scale-up, diagnosis, operation, control and optimization. A common practice in plant operation is to develop mass balances around the whole flotation bank in order to characterize the overall recovery, typically in rougher flotation. However, testing to fit flotation rate models are seldom developed on industrial flotation banks because they are high consumers of human labor during sampling, mineral samples preparation and chemical analysis development. In this paper a short-cut method is proposed which allows obtaining the relevant information for flotation rate modeling in a flotation bank with minimum effort and cost, and within a reasonable accuracy (less than 1–2% error in estimating cell recovery along the bank). The procedure considers two mass balances, one around the first cell of the bank and the second is the overall mass balance around the whole flotation bank, with a total of only 5 sampling streams. Examples developed in four rougher flotation banks located in three industrial concentrators illustrate the merit of this procedure.     

Fahl ore flotation

The authors discuss flotation of fahl ore. It is proved that tennantite should be separated into an individual copper product in order to enhance overall copper recovery and mitigate ecological impact by means of preventing arsenic volatilization under smelting. Single mineral fractions of pyrite, chalcopyrite, tennantite, secondary sulfides, sphalerite and quartz sampled in the Ural region, as well as the samples of copper-zinc ore containing fahl ore are examined. The research involves oxidation of copper sulfides and pyrite under grinding in different conditions. Concentration of oxygen and sulfur-bearing ions is under control. The differences in oxygen consumption, oxidation of pyrite, tennantite and other sulfides are used to develop the mode of tennantite separation from other copper sulfides, sphalerite and pyrite. Based on the research findings, the authors recommend a flotation technology for copper–zinc pyritic ore with high content of tennantite to separate tennantite and secondary copper sulfides in different flotation circuits at varied pH.