一种综合回收富钴冰铜浸出渣中有价金属的方法

正一种综合回收富钴冰铜浸出渣中有价金属的方法,涉及一种从镍冶炼转炉渣中提钴后的富钴冰铜渣中综合回收镍、铜、钴、铂、钯、金、银的方法。其特征在于其综合回收过程的步骤包括:(1)先将富钴冰铜浸出渣进行水洗,除去渣中夹带的硫酸盐;(2)然后用浮选工艺选出渣中的硫化相物质,回收有价     

一种浸出海绵铜的方法

正一种浸出海绵铜的方法,涉及一种从铜镍冶炼和精炼产生含铜渣-海绵铜中浸出镍、钴、铜的方法。其特征在于其浸出过程是以硫酸为浸出试剂,以氧为浸出氧化剂,加压氧化浸出海绵铜物料中的镍、钴、铜。本发明的优点是在此条件下进行海绵铜加压氧化浸出,铜、镍、钴的浸出率都能达到99%以上,同时浸出液中铜离子浓度可达90 g/L     

富钴结壳湿法冶金工艺中硫化渣的加压浸出

富钴结壳活化硫酸浸出液经过中和除铁、硫化沉淀后得到的渣采用加压浸出工艺处理,考察了温度、压力、酸度、液固比等因素对加压浸出过程的影响,确定了加压浸出条件,此时镍、钴的浸出率大于99.8%,铜的浸出率大于98%,加压浸出得到的镍、钴、铜混合溶液可进一步萃取分离得到纯净的金属溶液。     

稀贵金属加压浸出技术现状及展望

加压浸出属于湿法冶金过程强化技术,与常规湿法浸出相比,具有反应速度快、浸出率高、环境友好等优点,自1887年工业化以来,已在铀、铜、铝、锌、镍、钴、钼、黄金等行业得到推广应用。总结了加压浸出技术在稀贵金属行业的应用和研究现状,包括钼、黄金和铂族金属等原生矿产,以及铜阳极泥、镓锗富集渣、含砷固废等二次资源。在总结归纳技术现状基础上,对加压浸出技术在稀贵金属行业未来发展趋势进行了展望。     

含镍硫化物湿法冶金技术应用及研究进展

随着新型电动汽车和插电式混合动力汽车的批量生产,镍的需求将出现激增态势。湿法冶金技术在处理低品位、复杂难选的硫化镍矿或火法冶炼镍中间产品等资源方面具有优势。文中对氨体系加压浸出、酸体系加压浸出、氯化浸出、常压浸出及生物浸出工艺分别从原料特性、工艺特征、过程化学、工业实践、研究现状等角度进行了分析。高镍锍酸体系加压浸出工艺在镍湿法冶炼中占有重要地位,工艺较为成熟,应用也越来越广;氨体系加压浸出工艺在工艺方面仍有进步空间;含镍硫化物常压浸出和生物浸出工艺技术是未来的研究方向,但尚处于起步阶段。实际生产中,需要结合含镍硫化物资源特点、工艺适用性、市场产品需求等因素,因地制宜发展湿法冶炼提镍工艺。     

锌冶炼铜渣中有价金属综合回收技术研究

为了解决锌冶炼铜渣综合利用的问题,研究了铜渣综合回收有价金属工艺,在生产一级品五水硫酸铜同时回收铅、锌、银、锗等有价金属。采用的工艺流程为：铜渣通过氧压酸浸使铜、锌、锗进入浸出液,铅、银留在浸出渣中,浸出渣送铅冶炼系统回收铅、银,浸出液经过冷却萃取回收锗、萃余液盐析结晶、逆流洗涤结晶、烘干产出五水硫酸铜产品,锌、镉在结晶母液富集之后返回锌冶炼系统回收,实现了资源的最大化综合回收。铜、铅、银、锌、锗回收率分别达到 96.87%、99.9%、97.88%、93.61%、61.72%。     

钴铜原料生产新能源材料固废资源化研究

铜冶炼行业产生铅浮渣、铜镉渣、置换铜渣等固废,本文通过对物料化学性质进行研究,通过破碎磨矿、常压浸出、氧压浸出、高效+旋流选择性电积、沉淀开路、萃取、蒸发结晶等化工工艺流程,生产新能源材料,回收铜与硫酸钴产品,实现固体废物资源化综合利用研究。     

镍羰化渣浸出试验研究北大核心

镍羰化渣中含有铜、镍、钴、铁、硫、砷、金、银及铂族金属等,具有极大的回收价值。本文进行了羰化渣常压浸出-加压浸出小型试验,镍浸出率在98%以上,实现了羰化渣中镍金属的有效提取。     

高镍锍浸出渣高效清洁利用工艺

高镍锍是镍冶炼过程的重要中间产品,通过高镍锍可以使镍铁、电镍、硫酸镍等镍产品在市场中进行相互转化和维持平衡,对于镍产业的稳健发展具有十分重要的意义。高镍锍经湿法提镍后产生大量含镍、铜、钴及金、银、铂、钯等贵金属的浸出渣,具有巨大的综合利用价值。科研人员攻克了高镍锍浸出渣有价组分分离提取关键技术,实现了企业从最初的单一电解镍生产发展为镍、铜、钴和金、银、铂、钯等贵金属综合回收。近年来,在环保政策愈趋严格以及冶炼工艺低碳转型的形势驱动下,进一步提出了热压浸出降低渣含镍量、氧压浸出替代回转窑焙烧处理浸铜后渣、含钠高盐废水乏汽蒸发及资源化利用等技术对现有工艺进行优化升级和提质增效。本文主要介绍高镍锍浸出渣冶金工艺现状,剖析存在的问题,阐述改进工艺最新进展及其涉及的反应原理和工业实践情况,为相关企业提供参考。     

镍羰化渣浸出试验研究

镍羰化渣中含有铜、镍、钴、铁、硫、砷、金、银及铂族金属等,具有极大的回收价值。本文进行了羰化渣常压浸出-加压浸出小型试验,镍浸出率在98%以上,实现了羰化渣中镍金属的有效提取。     

Organic acid leaching of base metals from copper granulated slag and evaluation of mechanism

A hydrometallurgical method is discussed to selectively extract base metals such as copper, cobalt, nickel and iron from the copper granulated slag (0.53% Cu) at atmospheric pressure. It involves first-stage leaching of slag with organic (citric acid) to selectively recover cobalt, nickel and iron. The residue containing high copper was subjected to second-stage leaching with inorganic (sulphuric) acid. Leaching parameters such as acid concentration, pulp density, temperature and time were optimised to extract metals from the granulated slag. A maximum recovery of 4.47% Cu, 88.3% Co, 95% Ni and 93.8% Fe were obtained in first-stage leaching with 2?N citric acid at room temperature using 10% pulp density (w/v) in 8–9?h. On subjecting the leach residue to the second-stage leaching with 2?M sulphuric acid, 66–72% Cu was recovered in 4?h. The kinetics of the metal leaching from the slag was established by the XRD and SEM–EDAX studies of the residues.     

低冰镍氧压水浸试验研究

针对低冰镍现有处理工艺的不足,研究了低冰镍一种新的处理工艺——氧压直接水浸低冰镍,并对水浸的条件进行了条件优化实验。优化后水浸条件以温度175±5℃,浸出时间2.5 h,氧分压1.6 MPa,转速600r/min为宜。在优化条件下,低冰镍浸出率:Ni≥98%,Cu≥99%,Co≥99%,Fe<16%,为后续镍、铜、钴的分离创造了有利条件。     

高冰镍浸出渣冶金过程多金属走向行为探究

高冰镍浸出渣是镍湿法冶金过程的重要中间产物,含有铜、镍、钴和金、银、铂、钯等有价金属,具有重要的综合回收价值。探究高冰镍浸出渣冶金过程多金属的走向行为对于提高金属综合回收率、优化系统物料平衡和推动工艺技术升级具有重要意义。基于新疆阜康冶炼厂高冰镍浸出渣的典型冶金工艺,结合文献调研和工业生产实践,阐释高冰镍浸出渣中主要金属铜、镍、钴、铁和贵金属金、银、铂、钯的迁移走向,揭示各金属形态变化历程,分析各金属在渣相和液相的分配行为,为工艺设计和优化提供支撑。     

镍精矿加压酸浸新工艺研究

研究了金川镍精矿加压一步全浸镍、钴、铜新工艺,浸出液中和除铜后萃取分离镍钴,镍、钴、铜的浸出率可分别达到99.5%、98%和98%以上。该工艺与硫酸选择性浸出相比具有金属浸出率高、分离彻底、易分别回收等优点。     

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。     

LEACHING OF MASSIVE RICH COPPER ORE WITH ACIDIFIED FERRIC CHLORIDE

Massive rich copper ore, taken from the Küre region of Turkey and containing 7.95% Cu, 2.13% Pb, 0.341% Zn, 0.087% Co, 0.039% Ni, 0.9 (g/t) Au, and 17 (g/t) Ag, was subjected to the experimental study. Effects of leaching time, ferric ion concentration, solid/liquid ratio, acid concentration and temperature on the metal dissolution efficiencies were investigated in order to determine optimum leaching conditions and related leaching kinetics. As a result of these experiments carried out under the optimum leaching conditions, 76% of Cu, 55% of Co, 96% of Ni, 100% of Pb, and 91% of Zn were extracted. The value of apparent activation energy for copper dissolution was found as 43.8?kJ/mole, which is in agreement with the published data. The rate-controlling step was found as the diffusion of ferric ions into the sulfur layer formed on the surface of partially leached ore particles.     

铜旋浮冶炼电收尘烟灰脱砷工艺研究

阳谷祥光铜业有限公司采用旋浮熔炼工艺冶炼铜精矿,随着入炉铜精矿含砷的提高,电收尘烟灰中的含砷量也随之提高,砷在系统中不断循环,使阳极板中砷含量超标,影响阴极铜的质量.公司利用前期试验期间的保存样品进行了砷提炼试验,该提炼工艺包含水浸和酸浸两个过程.水浸试验表明铜烟尘经过水浸,烟灰中67.5％的铜和69.9％的锌被优先脱...     

影响赤泥中浸出锌铜钒铬的主要因素探讨

重金属元素的浸出研究对提高赤泥中元素的综合回收和环境保护具有重要意义,因此需要对赤泥中Zn、Cu、V、Cr元素的主要浸出因素进行探讨。实验以盐酸浓度、浸出温度、浸出时间为考察因素,各元素浸出量为考察指标,采用L₁₆(4³)的正交试验,借助电感耦合等离子体原子发射光谱法(ICP-AES),对影响赤泥中浸出Zn、Cu、V、Cr的主要因素进行探讨。结果显示,各待测元素校准曲线的线性相关系数均大于0.999 7。盐酸浓度与浸出温度对元素的浸出影响较为显著,而浸出时间影响较弱,4种元素浸出的最佳条件为盐酸浓度9 mol/L、浸出温度100 ℃、浸出时间60 min。上述浸出条件下,赤泥样品中Zn、Cu、V、Cr的浸出率分别为86.67%、85.88%、88.55%和87.57%。研究表明,合理控制盐酸浓度、浸出温度和浸出时间,可以有效地提高赤泥中Zn、Cu、V、Cr浸出量,为赤泥中重金属元素的回收提供参考。     

Factors affecting the leachability of Ni/Co/Cu slags at high temperature

An oxidative pressure acid leaching process was investigated for the extraction of Ni/Co/Cu/Zn metal values from base metal smelter slags. The process is applicable to smelting furnace dump slags, as well as to mid-stream converter slags. In addition to the economical advantages, extracting the base metal values from the dump slags produces an environmentally benign residue. To produce high level of extraction for the metal values, it is necessary to have the slag in crystalline structure. This, in turn, requires cooling the molten smelter slags sufficiently slowly during solidification. It was shown that if the same slags are quenched in water thereby producing an amorphous structure, the resulting metal extractions are substantially lower. The role of oxygen in the leaching reactions was also tested. The presence of oxygen is necessary for successful leaching of the metal values. After fine grinding, the slags were subjected to pressure acid leaching at 250 °C with an oxygen overpressure of 520 kPa. Sulfuric acid at a typical 0.3 acid to slag ratio was employed. Extractions higher than 90% of each of the nickel, cobalt, copper and zinc were achieved. Operating at 250 °C ensures that the concentration of Fe and Al impurity metals in leached solution remains very low. It was finally found that for high concentrations of divalent metals (Ni + Co + Cu + Mg) in the slag, a much higher quantity of sulfuric acid than the stoichiometric value is required. The latter is due to the drop of hydrogen ion concentration due to bisulphate formation.