从金宝山铂钯浮选尾矿中再回收铂钯的研究

根据金宝山铂钯浮选尾矿的矿石性质，采用磁选－磨矿－浮选工艺能有效地回收铂钯。在铂钯浮选中用丁黄药和丁胺黑药作联合捕收剂，用L101作微细脉石抑制剂，选别效果理想。在给矿品位为Pt0．216g/t和Pd0.603g/t时，获得精矿品位为Pt16.540g/t和Pd19.530g/t， 回收率为Pt41.64%和Pd23.37%.     

从金宝山铂钯浮选尾矿中再回收铂钯的研究

根据金宝山铂钯浮选尾矿的矿石性质,采用磁选-磨矿-浮选工艺能有效地回收铂钯.在铂钯浮选中用丁黄药和丁胺黑药作联合捕收剂,用L101作微细脉石抑制剂,选别效果理想.在给矿品位为Pt 0.216 g/t和Pd 0.603 g/t时,获得精矿品位为Pt 16.540 g/t和Pd 19.530 g/t,回收率为Pt 41.64%和Pd 23.37%.     

从铂钯精矿中提取金铂钯的研究——铂钯精矿的预处理

针对从铜阳极泥生产的铂钯精矿，采用氨水浸出和硫酸浸出预处理工艺除去杂质元素，富集金铂钯，研究结果表明，采用单一的氨水浸出和硫酸浸出均不能达到理想的除去杂质元素的效果；采用浸出-硫酸浸出，不但可除去95%的杂质元素，而且可把金铂钯的溶解损失率均降低到1%以下，同时金铂钯的富集比可达20倍。     

用尼尔森离心选矿机从克拉哈贝勒选厂磨矿回路中回收铂族金属和黄金

用尼尔森离心选矿机处理加拿大鹰桥公司克拉哈贝勒选厂磨矿回路产品，回收铂族金属和黄金。试验结果表明，铂族金属和金选择性地富集于球磨机排矿和水力旋流器底流中，采用常规尼尔森离心选矿机和可变速尼尔森离心选矿机的联合工艺，获得了满意的分选指标。球磨机排矿离心机二段分选精矿Pt，Pd和Au总回收率分别为84．70％，56．39％和80．50％；Pt，Pd和Au品位分别为137．67g／t，54．27g／t和155．93g／t；Pt，Pd和Au富集比为49．6，31．9和47．7。旋流器底流离心机二段分选精矿Pt，Pd和Au总回收率分别为76．52％，49．93％和77．79％；Pt，Pd和Au品位分别为112．70g／t，47．86g／t和120．81g／t；Pt，Pd和Au富集比为42．3，27．9和43．2。     

含铂钯铜镍精矿湿法冶金处理新工艺

云南省金宝山铂钯矿资源目前为我国仅次于甘肃省金川的第二个大型铂族资源矿产。其原矿铂族金属品位相对较富,Ｐｔ＋Ｐｄ＞２ｇ／ｔ的储量就占矿区总储量的３５．９％,块段平均品位达２．３３ｇ／ｔ。主要有用金属矿物为紫硫镍矿、镍黄铁矿、辉钴矿、辉铁镍矿、黄铜矿;贵金属矿物主要有砷铂矿、碲铂矿、铁铂金属互化物及钯银矿物与硫铂矿连生体等;非金属矿物主要是蛇纹石。原矿经选矿采用浮选工艺流程,在选别铜镍硫化矿物的同时,铂钯贵金属矿物也在精矿中得到富集,其精矿中主要有用金属品位为：Ｃｕ５．１０％,Ｎｉ３．７４％,Ｐｔ…     

红石砬铂钯矿选矿试验研究

针对红石砬铂钯矿,通过对铂钯矿工艺矿物学研究,根据矿石的工艺特性,确定了铂钯优选浮选,再进行磷灰石的选别和磁铁矿回收的工艺流程。在原矿含铂0.65 g/t,钯0.17 g/t,磷2.09%,铁9.95%的条件下,采用"优先浮铂—浮磷—磁选"的工艺流程,在磨矿细度为-74μm占81%时,可获得铂钯精矿铂品位138.40 g/t、回收率85.17%,钯品位22.40 g/t、回收率为52.71%的铂钯精矿;P2O5品位26.95%、回收率87.17%的磷精矿和铁品位54.20%、回收率36.50%的铁精矿。     

云南某尾矿回收贵金属铂钯的试验研究

根据尾矿中的铂钯矿物绝大多数与铁矿物结合的特点,本试验采用磁选+浮选的联合流程来回收尾矿中的铂钯金属。采用推荐流程,可获得铂钯精矿中铂、钯品位分别为11.20 g/t、28.37 g/t,回收率分别为54.70%、57.19%技术指标,充分回收了铂族金属。本研究对宝贵铂钯资源的开发利用具有重要意义。     

回收云南某尾矿贵金属铂钯的试验研究

根据尾矿中的铂钯矿物绝大多数与铁矿物结合的特点,本试验采用磁选+浮选的联合流程来回收尾矿中的铂钯金属。采用推荐流程,可获得铂钯精矿中铂、钯品位分别为11.20 g/t、28.37 g/t,回收率分别为54.70%、57.19%技术指标,充分回收了铂族金属。本研究对宝贵铂钯资源的开发利用具有重要意义。     

金宝山铂钯矿多元素的相关关系与铂族矿物的产出形式

从元素的相关关系入手 ,对金宝山铂钯矿石的 Cu、Ni、Pt、Pd相关关系进行了研究。结果表明 :Pt、Pd与 Ni的相关关系远较 Cu密切 ,Pt— Fe密切相关性远大于 Pd— Fe,而 Pd— S的密切相关性远大于 Pt— S。在矿物组合方面 ,Pt主要以 Pt— Pd— Sn、Pt— Fe金属互化物形式产出 ,而 Pd绝大多数以与亲硫元素 Sb、As、Te、Bi化合物形式产出。 Pt、Pd矿物产于含 Ni的蛇纹石矿物间     

铜陵有色卡尔多炉渣中稀贵元素的预富集试验

富含Au、Ag、Pt、Pd、Se等稀贵元素的卡尔多炉渣在返回卡尔多炉再提金、银前,进行预富集可以提高卡尔多炉的工作效率,降低卡尔多炉的生产成本,解决返回料越积越多问题。铜陵有色金属公司对其卡尔多炉渣进行了浮选预富集工艺研究,结果表明：以硫酸亚铁为硫化矿物的活化剂、硫化钠为氧化矿物的活化剂,采用粗选1重点回收硫化矿、粗选2重点回收氧化矿的2粗2精2扫、中矿顺序返回浮选流程,可获得Au、Ag、Pt、Pd、Se品位分别为508.76 g/t、55.78%、9.36 g/t、16.92 g/t、2.94%,Au、Ag、Pt、Pd、Se回收率分别为95.60%、90.09%、78.00%、88.50%、86.70%的浮选精矿;浮选尾矿采用SLon-400型离心选矿机重选,可获得金、银品位分别为9.45 g/t和1 600 00 g/t,金、银流程回收率分别为2.27%和3.28%的重选精矿;全流程的金、银回收率分别达9787%和9337%。因此,浮选-重选工艺是卡尔多炉渣的高效回收工艺,重选尾矿中的金、银可考虑采用化学选矿方法回收。     

铜铅锌硫矿提高铜回收率、精矿质量试验研究

针对某铜铅锌硫矿实际生产中存在的问题:铜浮选作业中有13.35%的铜损失在铜尾矿中;硫精矿含锌1.10%,杂质锌含量超标;锌精矿产品质量不合格(锌品位为18.38%),对铜浮选作业进行了多流程方案对比开路试验以及主要工艺条件的调整与优化,可获得铜精矿铜品位15.11%,铜回收率92.30%指标,较现场铜回收率提高了5.65%。采用抑锌浮硫工艺流程,可将现场硫精矿中锌品位由1.16%降至0.41%。对现场锌精矿采用不再磨、再磨工艺均显著提高了锌品位(锌品位最高可达48.71%),同时对该流程下浮选尾矿可作为单独的硫精矿产品进行回收。     

新型硫醚萃取剂萃取分离钯、铂的性能

介绍了一种新型萃取剂--丁基苯并噻唑硫醚(简写为S_N)对钯、铂的萃取性能。结果表明: S_N对钯的萃取性能很好。并通过正交试验方法确定了S_N萃取分离钯、铂的最佳萃取条件为: CCl₄作稀释剂; φ(S_N)=12%; c(HCl)=3 mol/L; 萃取时间为10 min; 相比O/W=1∶1。在该条件下可以有效地分离钯和铂, 且钯的一次萃取率可高达99%, 铂的萃取率仅为1.4%。载钯有机相用NH₃·H₂O进行反萃取, 一次反萃取率也达99%。     

Hydrometallurgical processing of Platreef flotation concentrate

Platinum producers are evaluating hydrometallurgical process routes to extract platinum group metals (PGM) and base metals (BM) from flotation concentrate that are alternative to conventional pyrometallurgical matte smelting treatment of flotation concentrates. This approach would attract several potential benefits to the cost-effective processing of lower-grade and high-chromium concentrates. Ivanhoe Nickel and Platinum Ltd. wished to investigate this option on samples arising from their Platreef project in the northern limb of the Bushveld Complex in South Africa, from concentrate containing 1.5 g/t Pt, 2.5 g/t Pd and 0.5 g/t Au, as well as 1.5% Ni and 1.2% Cu. Other PGMs assayed rather low grades in the concentrate (Rh 128 ppb; Ru 153 ppb; Os 18 ppb; Ir 31 ppb) so the focus was on Pt, Pd and Au in this study. Some twenty-two hydrometallurgical process flowsheet variants were considered for evaluation in a testwork programme combining several conventional and proprietary unit process technologies.The testwork outcomes suggested that a hydrometallurgical flowsheet alternative to smelting (the patented Kell Process) is potentially a practical, environmentally benign and energy-efficient approach for treating low-grade Platreef concentrate with relatively low risk. This process broadly comprises selective leaching of base metals by pressure oxidation, followed by leaching of PGMs after a roasting pretreatment step shown to render PGMs and particularly Pt amenable to leaching. The process embodies separation of the value metals (PGM and base metals) into separate chloride and sulfate solution streams, respectively, and impurity elements (Fe, Al and gangue) into a tailings product. Key elemental deportments from the un-optimized process were Ni 96%, Co 94%, Cu 94%, Pt 96%, Pd 94% and Au 87%.Preliminary work indicated that further improvements in value metal recoveries, impurity separations and reagent consumptions may be gained from further optimization of the individual unit processes. Moreover, the recycle of key reagents uses existing proven technologies, rendering the process more economically and environmentally favourable. Initial assessment suggests that the Kell Process should offer both economic and environmental benefits over conventional pyrometallurgical matte smelting treatment of Platreef flotation concentrate.     

Design and measurement of small recovery gains: A case study at Raglan concentrator

The appearance of a significant amount of liberated fine pentlandite in the Raglan tailings, during a campaign to demonstrate future ore behaviour, called attention to a recovery opportunity. This opportunity was identified by a statistical benchmark survey of the operation during that campaign, and QEMSCAN measurement of these survey samples. This development was caused by escalating ore treatment rates and different characteristics in future ore sources. It was thus proposed to change the selection of collector from potassium amyl xanthate (PAX) to potassium isobutyl xanthate (PIBX). Laboratory scale flotation testwork, using high-confidence flotation testing, followed. The PIBX showed much faster flotation than the PAX. Nickel yield to first rougher concentrate was increased from 23.5% to 44.2%. The Raglan flowsheet bypasses this first rougher concentrate directly to final concentrate. Thus there was an expectation that overall performance would improve at plant scale when using PIBX. A designed plant trial was implemented in 2007 to measure and confirm the performance gain. This trial design used on–off switching following a 3-month baseline data block of normal operations using PAX. This layout provided checking of standard PAX performance prior to and during the trial. Thereafter, they were used to evaluate the trial blocks using PIBX. This trial format was deliberately designed so as to overcome the effects of autocorrelation in the operations data. In this way, small but significant metal recovery gains may be measured and proven in a plant trial. The paper describes the case study to show that this approach successfully blocks out autocorrelation in time, which is an obstacle in analysing concentrator operations data. The results showed that the PIBX had produced clear and statistically significant recovery gains for Ni, Cu, Pt and Pd. Adjusted for feed and concentrate grades, these recovery gains were: Ni: 1.04%, Cu: 1.01%, Pt: 2.67% and Pd: 1.79% in absolute terms.     

基于物元分析的铅精矿质量评价方法研究

由于铅精矿中含有多种金属矿 ,给铅精矿质量等级的评价带来很大困难。本文采用物元分析理论 ,建立了铅精矿质量综合评定模型 ,解决了铅精矿质量评定问题 ,该模型对其它有关质量评定问题有借鉴意义。