某含钴硫酸镍溶液除钴实验

考查某含钴中间产物碳酸镍硫酸溶解所得硫酸镍溶液黑镍除钴和溶剂萃取法净化除钴的效果。黑镍除钴和溶剂萃取都能达到净化硫酸镍溶液的目的 ,得到符合电解沉积的阴极液。黑镍除钴需 3段重复作业且黑镍制备成本高。溶剂萃取成本低、对环境友好 ,是比较理想的处理此含镍物料的方法。     

某含钴硫酸镍溶液除钴实验

考查某含钴中间产物碳酸镍硫酸溶解所得硫酸镍溶液黑镍除钴和溶剂萃取法净化除钴的效果。黑镍除钴和溶剂萃取都能达到净化硫酸镍溶液的目的，得到符合电解沉积的阴极液。黑镍除钴需3段重复作业且黑镍制备成本高。溶剂萃取成本低、对环境友好，是比较理想的处理此含镍物料的方法。     

Cyanex272在镍钴分离中的应用

研究黑镍除钴渣酸溶后溶液用Cyanex272萃取钴,实现钴、镍的深度分离,并介绍其工业生产应用.试验结果表明混合时间3rnin,Co的萃取率可达98%以上;经2级萃取溶液中的Co2+由4.5降至0.01g/L以下;负载有机相经三级洗涤[Co]/[Ni]达到529.20;通过三级萃取,三级洗涤,钴的萃取率达99.90%以上,镍钴分离系数βCo/Ni为2.50×105;两级反萃使有机相含Co2+降至0.020g/L以下;采用去离子水二级洗涤,Cl-几乎100%被洗掉,不会进入硫酸镍溶液中循环积累.工业实践中黑镍除钴渣酸溶后溶液经P204萃取除铜、铁-Cyanex272萃取分离镍钴-氯化钴溶液草酸沉淀-草酸钴煅烧,产出的精制氧化钴粉达到国家Y1级标准,产出的硫酸镍溶液完全满足生产1#电镍的要求.     

采用离心萃取器萃取净化氯化浸出镍溶液

本研究了氯化浸出含镍物料所得的含钴铁量的高的镍溶液的净化和钴铁回收工艺，采用Ｎ２３５－异辛醇－煤油萃取体系在离心萃取器中分离镍与钴，铜，铁，锌，用离子交换除铅，用活性碳除有机物，得到可用于生产１号标准电镍的氯化镍溶液以及含Ｃｏ大于１００ｇ／Ｌ，Ｃｏ／Ｎｉ大于４０００的氯化钴溶液和含Ｆｅ大于２５ｇ／Ｌ，Ｆｅ／Ｎｉ大于１０００的氯化铁溶液，镍，钴回收率分别大于９９％和９７％。     

水淬金属化高冰镍选择性浸出镍钴过程中的相转变

<正> 前言高冰镍湿法冶金自五十年代兴起后又有新发展,由高锍磨浮-硫化镍阳极电解-阳极液净化流程,进展为金属化高冰镍水淬常压或加压浸出-黑镍除钴-不溶阳极电积铜及镍的工艺流程。吸取国内外各流程的优点,我院采取了水淬金属化高冰镍用硫酸硫酸铜溶液     

氯化浸出镍溶液净化全流程研究

本文针对镍精矿、铜渣与一次合金氯化浸出镍溶液的净化和钴、铁的富集回收，就萃取体系的选择，流程设计、分离技术等进行了研究。用单一的Ｎ＿（２３５）（三辛胺）萃取体系同时去除溶液中的铁、铜、钴等杂质，用离子交换法去除溶液中的铅，净化后溶液可满足生产１号电镍的要求，镍收率大于９９％。钻溶液含钴大于ｕ０ｇ／Ｌ，Ｃｏ／Ｎｉ＞５６００，钴收率大于９７％。铁溶液含铁４０～７０ｇ／Ｌ，Ｆｏ／Ｎｉ＞１０００。本流程进行了萃取平衡试验，并用离心萃取器进行了台架试验和半工业试验，结果表明，本流程是切实可行的。     

镓锗铜萃余液综合回收工艺流程设计与完善

针对湿法炼锌镓锗铜综合回收系统产出的萃余液,根据溶液含有锰、镉、钴、锌、钠、砷、铝、铁等元素的特点,工艺流程设计采用中和氧化除砷铝铁锰、锌粉置换除镉、有机试剂除钴镍、纯碱法生产工业碱式碳酸锌、高温煅烧生产工业活性氧化锌和一步法生产工业无水硫酸钠,将镓锗铜萃余液中有价离子元素分步分离、富集回收,最终可产出含Cd20%的除镉渣、含Co1.2%,Ni1%的钴镍渣,符合化工行业标准HG/T 2523—2016的工业碱式碳酸锌,符合化工行业标准HG/T 2572—2012的工业活性氧化锌,以及符合国家标准GB/T 6009—2014的工业无水硫酸钠产品,进一步完善了综合回收工艺流程。     

钴渣选择性酸溶抑制铜铁的研究与实践

阜康冶炼厂高冰镍的常压浸出液因含浸出渣悬浮物,导致黑镍除钴工序中所产的钴渣含铜、铁量偏高。在新建的钴车间没有除铁设施的条件下,如按常规方法溶解钴渣,Ｐ２０４萃取除杂系统难以正常运行。研究人员用镍、钴、铁的电位－ｐＨ图确定出选择性溶解镍、钴的操作区域及操作方法,获得了合格的镍钴溶解液,使投产顺利进行。     

氨性溶液中铜镍钴的萃取分离

采用PT5050萃取剂，分离和富集镍矿氨液中的铜、镍、钴。采用2级萃取，溶液中铜、镍的萃取率可达99．5％以上，钴不被萃取，经3级低酸选择性反萃镍，镍的反萃率达99％以上，镍反萃液中铜含量小于0．001g/L，满足电镍生产要求。有机相经高酸（180g/L H2SO4)反萃铜，铜反萃液生产电铜或结晶硫酸铜。用硫化钠沉淀萃余液中的钴，钴的沉淀率大于96％，所得到的钴硫精矿含钴大于40％。     

应用离子浮选从二氧化硫浸出锰矿溶液中分离钴镍铜

本文叙述从二氧化硫浸出锰矿溶液中分离钴、镍、铜的离子浮选方法。从溶液(42.05Mn,3.24Fe,0.0996Co,0.128Ni和0.148Cu克/升)中,以硫化钠、乙基黄原酸盐作为沉淀剂,实现钴,镍、铜的分离。由于硫化铜、钴镍的黄原酸盐具有强烈疏水性,可用离子浮选方法从溶液中除去硫化铜、钴镍黄原酸盐的沉淀物。铜在硫化铜精矿中,钴、镍在钴镍的黄原酸盐精矿中,均有98％得到回收。扩大试验取得了和小型试验相同的指标。该过程包括分两段加入6％NaOH到钴、镍黄原酸盐中,使钴镍获得有效的分离,约60％的乙基黄原酸盐得到回收。     

Recovery of nickel and cobalt from leach solutions of nickel laterites using a synergistic system consisting of Versatic 10 and Acorga CLX 50

A direct solvent extraction (DSX) process to recover nickel and cobalt from laterite leach solutions is potentially more cost effective compared to the traditional precipitation and re-leaching method. A synergistic solvent extraction (SSX) system consisting of Versatic 10 and Acorga CLX 50 in ShellSol 2046 was studied for DSX nickel and cobalt recovery from a synthetic solution using semi-continuous tests. The effect of pH on the metal distribution profile and metal separation were investigated. It was found that the SSX system can effectively recover nickel and cobalt and separate them from manganese, calcium and magnesium. Over 99% of Ni and Co was extracted using four stages of semi-continuous extraction from the synthetic laterite solution at pH 6.3 and an A/O flowrate ratio of 1:1. More than 80% of the manganese was rejected to the raffinate. The co-extraction of calcium was less than 5% and the co-extraction of magnesium was negligible under these conditions. The co-extracted manganese and calcium were readily scrubbed in three stages semi-continuous scrubbing. The loaded strip liquor with a high concentration of nickel (71.3 g/L Ni) was obtained after two-stage continuous stripping. The final strip solution pH of 3 would be suitable for nickel electrowinning. A conceptual DSX process flowsheet using the SSX system to recover nickel and cobalt from laterite leach solutions after iron removal has been proposed.     

Hydrometallurgical processing of nontronite type lateritic nickel ores by MHP process

The research work presented in this paper determined the optimum conditions at which nickel and cobalt could be obtained at maximum efficiency from the column leach liquor of the lateritic nickel ore existing in Gördes region of Manisa in Turkey by performing effective hydrometallurgical methods. This column leach solution was initially neutralized and purified from its basic impurities by a two-stage iron removal process, nickel and cobalt were precipitated in the form of mixed hydroxide precipitate from the purified leach solution by a two-stage precipitation method called “MHP” and a manganese removal process was performed at the optimum conditions determined experimentally. By decreasing manganese concentration with this process to an acceptable level yielding at most 10% Mn in hydroxide precipitate, it was possible to produce a qualified MHP product suitable to the current marketing and standard conditions. The experiments conducted showed that by maintaining recycle leaching with sulfuric acid at which 95% of Ni-Co could be recovered from the precipitates, about 81% of Ni and 63% of Co in the lateritic nickel ore (9.72 kg Ni/ton of ore and 0.28 kg Co/ton of ore) could be extracted as mixed hydroxide precipitate by MHP process.     

废旧三元锂电池回收中间产物铝渣的资源化研究

采用氢氧化钠碱浸-碳分工艺处理废旧电池回收中间产物——铝渣, 实现了废渣中的镍钴锰与铝分离并分步回收。结果表明, 在反应温度200 ℃、氢氧化钠浓度6 mol/L、苛性比为5、碱浸5 h条件下, 碱浸液中铝浸出率可达97.70%, 镍钴锰浸出率小于0.23%; 碱浸渣经浸出-除杂-萃取后, 得到Ni、Co、Mn含量均大于100 g/L, Fe、Al含量均小于0.001 g/L的纯净硫酸镍、硫酸钴、硫酸锰溶液, 从而实现废旧三元锂电池中铝与镍钴锰的资源化高效回收利用。     

Cyanex 272萃取分离硫酸钴溶液中镍钴的试验研究

采用Cyanex 272萃取剂从硫酸钴溶液中分离去除镍,在有机相组成为25%Cyanex 272+75%航空煤油(用30%NaOH皂化,皂化率75%)、萃原液pH值4.5～5.0、温度25～35 ℃、相比1.5～2条件下,经5级逆流萃取,混合萃取时间5 min,然后用1 mol/L硫酸溶液4级反萃取获得反萃取液,钴直收率达99.86%,Ni去除率达95.20%,钴镍分离效果较好。反萃取后的硫酸钴溶液中杂质含量很低,Co/Ni比达368 95,可以满足生产精制CoSO₄·7H₂O和电钴的要求。     

Electrolytic nickel recovery from lithium-ion batteries

Lithium/cobalt/nickel oxide (LiCo_xNi_1−xO₂, 0<x<1) is one of the cathode materials currently used in commercial Li-ion batteries. The direct Ni recovery by electrochemical methods from leach liquor obtained by dissolution of this cathode is not possible because of cobalt anomalous co-deposition.After separating Ni from Co by SX methods, nickel has been recovered by means of both galvanostatic and potentiostatic electrowinning. Operative conditions such as solution pH, temperature, Ni concentration, bath agitation and, in the case of galvanostatic operation, current density have been determined for the selected cathode and anode material.The use of galvanostatic conditions enables a good Ni metal deposit to be obtained, while potentiostatic conditions result in an almost complete depletion of nickel in the electrolyte.     

应用新一代萃取剂Cyanex272进行钴镍分离的研究

Ｃｙａｎｅｘ２７２是新一代在硫酸盐溶液中分离钴、镍的萃取剂。本文研究了各种因素对Ｃｙａｎｅｘ２７２分离钴、镍的影响,探寻了Ｃｙａｎｅｘ２７２在镍电解净液钴渣处理工艺和高冰镍精炼新工艺中的应用前景。     

N235萃取净化氯化镍溶液的有机相组成及其工艺的研究

镍精矿氯气浸出液经除铁后,用萃取剂N     

Leaching of limonitic laterite ore by acidic thiosulfate solution

Cobalt is usually recovered as a by-product of copper and nickel processing, and only a small amount of cobalt is derived from laterites although a vast majority of cobalt resources in them. The exploitation of limonitic laterite containing high content of cobalt is becoming increasingly important. The mineralogy of a limonitic laterite ore was characterized by environmental scanning electron microscope (ESEM) and X-ray diffraction (XRD) in this paper. The results show that nickel occurs in goethite mainly, while cobalt is predominantly associated with manganiferous minerals. Thiosulfate is found to be able to selectively leach cobalt from limonitic laterite in the presence of sulfuric acid, and 91% Co, 22% Ni, 10% Fe are leached from an ore containing 0.13% Co, 1.03% Ni within the first 5 min at 90 °C under the conditions of 10 g/L sodium thiosulfate, 8% (w/w) sulfuric acid and 10:1 L/S ratio. The leaching kinetics of Mn and Co by acidic sodium thiosulfate solution can be characterized by the Avrami equation. In acidic solution, thiosulfate readily decomposes into sulfur and sulfur dioxide as intermediary reagents to reduce pyrolusite (MnO₂) and goethite (FeOOH); therefore, nickel and cobalt associated with goethite and pyrolusite respectively are extracted due to reduction dissolution. Furthermore, cobalt is selectively leached over iron and nickel because pyrolusite is preferentially reduced by acidic thiosulfate rather than goethite. The novel process may give an alternative method to selectively recover cobalt as the primary product from limonitic laterites at atmospheric pressure.     

Selective extraction of nickel from ammoniacal solutions containing nickel and cobalt by emulsion liquid membrane using 5,7-dibromo-8-hydroxyquinoline (DBHQ) as extractant

The selective extraction and concentration of nickel from ammoniacal solutions containing nickel and cobalt by an emulsion liquid membrane (ELM) technique using 5,7-dibromo-8-hydroxyquinoline (DBHQ) as extractant has been presented. ELM consists of a diluent (kerosene), a surfactant (Span 80), an extractant (DBHQ), a modifier (tributyl phosphate), and a stripping solution (very dilute sulfuric acid solution containing EDTA as complexing agent, buffered at pH 4.25). Cobalt (II) in feed solution with 6 mol/L ammonia was oxidised to Cobalt (III) by H₂O₂ and pH of this ammoniacal solution was adjusted to 10.0 with the addition of hydrochloric acid (HCl). The important variables governing the permeation of nickel and their effect on the separation process have been studied. These variables were membrane composition, ammonia concentration in the feed solution, mixing speed, surfactant concentration, extractant concentration, pH of the feed and the stripping solutions, complexing agent concentration in the stripping solution, and phase ratio. After the optimum conditions had been determined, it was possible to selectively extract 99% of nickel from the ammoniacal solutions containing Ni and Co. The separation factors of nickel with respect to cobalt, based on initial feed concentration, have experimentally found to be of as high as 88.1 for about equimolar Co–Ni feed solutions.