共查询到18条相似文献,搜索用时 125 毫秒
1.
阜康镍冶炼厂含镍铜渣冶炼工艺研究 总被引:1,自引:0,他引:1
采用焙烧—浸出—电积工艺处理阜康镍冶炼厂含镍铜渣。在焙烧温度 80 0~90 0℃、浸出温度 6 5~ 70℃、浸出时间 12 0min的条件下 ,可得到铜浸出率为 97%。由于浸出液含铁极低、含镍低于 1g/L ,不需净化可直接电积。工业生产中可抽取一定量的铜电积老液送镍冶炼系统 ,防止铁、镍累积。含镍铜渣中的贵金属全部进入浸出渣 ,浸出渣率很低有利于贵金属富集。该工艺流程结构简单 ,金属回收率高 ,含镍铜渣中有价金属可综合回收 ,无环境污染 相似文献
2.
3.
4.
针对含贵金属热滤渣物料的物相及元素组成, 提出了氧化焙烧脱硫-硫酸选择性浸出贱金属铜和镍富集贵金属工艺, 讨论了物料粒度、焙烧时间、焙烧温度、硫酸浓度、浸出时间、浸出温度等因素对贵金属富集比的影响。获得最佳工艺参数为: 热滤渣粒度0.080~0.106 mm, 焙烧时间6 h, 焙烧温度700 ℃, 硫酸浓度45%, 浸出时间5 h, 浸出温度95 ℃。在此条件下, 脱硫率达到98.89%, 铜、镍浸出率分别为98.33%和98.12%, 硫酸浸出渣中Au含量1 198.60 g/t, Ag含量1 807.79 g/t, Pt含量1 801.27 g/t, Pd含量1 937.66 g/t。从原料到硫酸浸出渣, 贵金属富集比达到14.19倍。该工艺流程操作简单、富集比高、回收率高、成本低, 可为从热渣中富集贵金属提供借鉴作用。 相似文献
5.
贵金属业炼工艺被分为5个阶段:1.铜/镍在高压釜中的浸出;2.硒焙烧;3.多尔(金银)熔炼;4.银电解;5.金回收体系。该工艺近几年在奥托昆普公司的哈雅瓦尔塔金属冶炼厂得到发展,该厂每年处理大约600,000kg铜阳极泥。奥托昆普的波利(Pori)工厂阳极泥处理工艺流程从1941年以来不断取得进展并发展迅速。主要的变化是将常压浸出改成高压浸出,将硫酸焙烧改成二氧化硫/氧气焙烧,老式金银熔化炉改为转 相似文献
6.
应用浮选和与黄铁矿焙烧工艺从铜渣中回收有价金属 总被引:2,自引:0,他引:2
研究了从土耳其Kure地区堆存的老铜渣中回收铜和钴的工艺.所研究的铁橄榄石类型的堆存老铜渣含有1.24%Cu、0.53%Co和51.63?.研究了两个不同回收有价金属的方法.第一个方法是铜渣与黄铁矿一起焙烧,然后浸出.第二个方法是铜渣先浮选回收铜,浮选尾矿与黄铁矿一起焙烧,焙砂浸出.试验结果表明,第二个方法适于处理这种类型的铜渣.在浮选阶段获得的铜精矿铜品位为11%,铜回收率为77%.浮选尾矿的钴回收率为93%.在焙烧试验中研究了焙烧时间、焙烧温度和黄铁矿与铜渣重量比对铜和钴溶解率的影响,并确定了最佳的焙烧条件.在500℃温度下和黄铁矿与铜渣重量比为3:1时焙烧1h后,钴的溶解率为87%,铜的溶解率为31%.根据本试验结果,推荐了处理这种铜渣的工艺流程. 相似文献
7.
研究了从土耳其Kure地区堆存的老铜渣中回收铜和钻的工艺.所研究的铁橄榄石类型的堆存老铜渣含有1.24%Cu、0.53%Co和51.63%Fe.研究了两个不同回收有价金属的方法.第一个方法是铜渣与黄铁矿一起焙烧,然后浸出.第二个方法是铜渣先浮选回收铜.浮选尾矿与黄铁矿一起焙烧,焙砂浸出.试验结果表明,第二个方法适于处理这种类型的铜渣.在浮选阶段获得的铜精矿铜品位为11%,铜回收率为77%.浮选尾矿的钴回收率为93%.在焙烧试验中研究了焙烧时间、焙烧温度和黄铁矿与铜渣重量比对铜和钴溶解率的影响,并确定了最佳的焙烧条件.在500℃温度下和黄铁矿与铜渣重量比为3:1时焙烧1h后,钴的溶解率为87%,铜的溶解率为31%.根据本试验结果,推荐了处理这种铜渣的工艺流程. 相似文献
8.
9.
10.
11.
我国镍冶金的发展与工艺技术进步 总被引:2,自引:6,他引:2
我国的镍冶金生产近30年来取得了巨大的发展,工艺技术的进步尤为突出。本文重点论述了我国镍冶金现有的电炉、闪速炉熔炼低冰镍-转炉吹炼高冰镍-铜镍磨浮分离-硫化镍阳极电解;高冰镍两段逆流硫酸选择性浸出-黑镍沉钴-电积;二次镍精矿制粒-沸腾焙烧生产氧化镍等工艺流程。同时,介绍了我国自行研究开发的高冰镍氯化精炼;焙烧-氨浸-氢还原;镍精矿微波脱硫-热等离子体熔炼高冰镍;大洋多金属结核常压氨浸和硫酸选择性浸出回收镍等有价金属的新工艺新技术。 相似文献
12.
13.
硫化镍是镍冶炼的重要原料,加压浸出技术在硫化镍冶炼中占有重要地位。本文对硫化镍加压浸出研究及应用进行了简单的介绍。根据反应体系的不同,镍加压浸出分为酸性加压浸出和氨性加压浸出两大类,工业生产中氨性加压浸出应用较少,以酸性加压浸出为主。硫化镍加压浸出处理原料灵活多样,主要包括硫化镍精矿、镍锍、镍钴硫化物等。另外,其在镍冶炼渣、低品位复杂物料处理方面也有一定的研究应用。加压浸出工艺灵活,综合回收率高,可同时生产镍、钴、铜、铂族金属等多种产品,主产品即可为硫酸镍,也可为电镍或镍粉,产品质量高,环境污染小,具有一定的市场竞争力。 相似文献
14.
15.
《Minerals Engineering》2007,20(8):753-760
Acidic polymetallic wastewaters are generated during the pyrometallurgical treatment of chalcopyrite for the production of primary copper. The most important wastewater streams originate from the copper refining and the electrolyte regeneration stages, as well as the sulphuric acid and the precious metals plants. These wastewaters are characterized by medium to high concentration of residual sulphuric acid and heavy metals such Cu, Ni, Pb, Zn, Fe, As, Sb, Bi, etc. Taking into account that the outflows of these industrial streams are usually high, a large amount of valuable metals such as copper and nickel are potentially lost. Thus, it is of great importance to treat properly the wastewaters so that the contained valuable metals to be recovered. This paper is dealing with the treatment of synthetic solutions simulating industrial wastewaters from the copper pyrometallurgical plant in Bor, Serbia. The basic concept includes copper electrorecovery followed by nickel precipitation through neutralization. The feasibility of this treatment was proved theoretically with the thermodynamic analysis of electrochemical and precipitation reactions in this system, as well as experimentally under various conditions. The main conclusion is that copper can be recovered electrolytically followed by bismuth and the two metalloids arsenic and antimony that exhibits almost the same electronegativity with copper. The other high electropositive metals Ni, Pb, Zn, Fe remain, as it was expected, in the solution from which nickel can be recovered with neutralization, contaminated with Cu, Fe, Zn and traces of bismuth, arsenic and antimony. The proposed treatment technology has innovative character because it can mitigate environmental impacts and eliminate solid waste generation while at the same time can recover valuable metals. 相似文献
16.
矿浆电解法浸出大洋多金属结核的研究 总被引:4,自引:1,他引:4
矿浆电解是近年来新兴的一种湿法冶金技术。本文阐述了多金属结核矿浆电解浸出原理,以及浸出电量、酸度、粒度等工艺参数对有价金属浸出率的影响。研究结果表明,采用矿浆电解法在HCl-NaCl体系中处理多金属结核矿是完全可行的,在优化条件下锰、钴、铜、镍有价金属的浸出率均为97%;同时,阳极产出合格的电解二氧化锰。 相似文献
17.
大洋富钴结壳熔炼合金的锈蚀浸出及除铁研究 总被引:1,自引:0,他引:1
采用锈蚀浸出工艺处理DY95-9 航次大洋富钴结壳熔炼合金粉末, 研究了浸出酸量、浸出时间及催化剂对合金中钴镍铜等有价金属浸出率的影响。在最佳锈蚀浸出条件及经除去浸出液中的少量铁后钴镍铜锰的浸出直收率分别为93.68%、94.55%、91 .73%和95 .62%, 而几乎全部的铁、磷、碳和钼等进入浸出渣中, 锈蚀浸出过程中铁基本不耗酸。 相似文献
18.
Hydrometallurgical process routes are typically used for separation of platinum group metals (PGMs) from base metals in Ni-Cu converter matte. Nickel dissolution is primarily achieved in the first stage leach (high pressure or atmospheric leaching, or a combination of the two), which is followed by second stage high pressure sulphuric acid/oxygen leaching to dissolve copper and the remaining nickel. PGMs are recovered from the leaching residue, and their dissolution must hence be limited. The leaching of base metals in the first stage has been characterised, but there is a limited understanding of the behaviour of metals, and more specifically PGMs, in the second stage pressure leach. This research presents the results of laboratory work performed to investigate the kinetics of leaching in the second stage pressure leach. The influence of key operating parameters such as the temperature, pressure, and initial acid concentration on PGM dissolution was investigated. 相似文献