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1. 发明公开

EP3550040A1 WET METALLURGY METHOD FOR NICKEL OXIDE ORE 审中-公开
公开(公告)号：EP3550040A1
公开(公告)日：2019-10-09
申请号：EP17876261.3
申请日：2017-11-16
申请人： Sumitomo Metal Mining Co., Ltd.
发明人： YONEYAMA Tomoaki , SHIBAYAMA Keisuke
IPC分类号： C22B23/00 , C22B3/06 , C22B3/44
摘要： Disclosed herein is a hydrometallurgical method for nickel oxide ore based on high pressure acid leaching which is capable of increasing the recovery rate of nickel in a dezincification step of removing zinc contained in the ore.
The hydrometallurgical method includes: a leaching step S1 in which nickel oxide ore is subjected to acid leaching under high pressure to obtain a leachate; a neutralization step S3 in which a neutralizer is added to the leachate to generate a neutralized precipitate, and the neutralized precipitate is removed to obtain a post-neutralization solution; a dezincification step S4 in which hydrogen sulfide gas is blown into the post-neutralization solution to generate a zinc precipitate, and the zinc precipitate is removed to obtain a post-dezincification solution; and a nickel recovery step S5 in which a sulfurizing agent is added to the post-dezincification solution to recover nickel as a sulfide, wherein the hydrogen sulfide gas is blown into two or more reaction tanks connected in series to allow the post-neutralization solution to flow therethrough in order in such a manner that an amount of the hydrogen sulfide gas blown into the second and following reaction tanks from top is adjusted to 50% or more but 90% or less of a total amount of the hydrogen sulfide gas blown into all the reaction tanks.

2. 发明授权

EP2599885B1 PROCESS FOR PRODUCTION OF FERRONICKEL SMELTING RAW MATERIAL FROM LOW GRADE LATERITIC NICKEL ORE 有权
标题翻译：方法用于生产镍铁RAW MELTING材料从红土镍矿低次
公开(公告)号：EP2599885B1
公开(公告)日：2016-03-02
申请号：EP11812277.9
申请日：2011-07-13
申请人： Sumitomo Metal Mining Co., Ltd.
发明人： KOBAYASHI Hiroshi , NAKAI Osamu , SHIBAYAMA Keisuke , NAKAI Takayuki , OZAKI Yoshitomo , TOKI Norihisa , TAKAHASHI Junichi , TAN Toshirou
IPC分类号： C22B23/00 , C22B1/02 , C22B1/16 , C22B3/04 , C22B3/20 , C22B3/44 , C22B7/00 , C22B23/02 , C22C33/04
CPC分类号： C22B1/02 , C22B3/0005 , C22B3/12 , C22B3/44 , C22B23/005 , C22B23/021 , C22B23/023 , C22B23/0461 , Y02P10/234

3. 发明公开

EP3524700A1 HYDROMETALLURGICAL METHOD FOR REFINING NICKEL OXIDE ORE 审中-公开
公开(公告)号：EP3524700A1
公开(公告)日：2019-08-14
申请号：EP17858474.4
申请日：2017-10-05
申请人： Sumitomo Metal Mining Co., Ltd.
发明人： MIYAMOTO Takashi , SHIBAYAMA Keisuke
IPC分类号： C22B23/00
摘要： Disclosed herein is a hydrometallurgical method for refining nickel oxide ore in which a filtration device is prevented from being quickly clogged to improve production efficiency.
The hydrometallurgical method for refining nickel oxide ore includes: a leaching step in which nickel oxide ore is subjected to acid leaching under high pressure; a solid-liquid separation step in which an obtained leach slurry is washed and then subjected to solid-liquid separation to obtain a leachate containing the nickel; a neutralization step in which a neutralizer and a flocculant are added to the leachate to obtain a neutralized precipitate, and then the neutralized precipitate is separated by solid-liquid separation from a post-neutralization solution containing nickel; a dezincification step in which a sulfurizing agent is added to the post-neutralization solution to obtain a slurry containing zinc sulfide, and the slurry is subjected to solid-liquid separation to obtain the zinc sulfide and a post-dezincification solution; and a nickel recovery step in which a sulfurizing agent is added to the post-dezincification solution to obtain a mixed sulfide containing the nickel, and the mixed sulfide is separated by solid-liquid separation from a post-sulfurization solution, wherein an amount of the neutralizer added is adjusted so that a Fe concentration of the post-neutralization solution obtained in the neutralization step is 1.25 g/L or less.

4. 发明公开

EP2599885A1 PROCESS FOR PRODUCTION OF FERRONICKEL SMELTING RAW MATERIAL FROM LOW GRADE LATERITIC NICKEL ORE 有权
标题翻译：方法用于生产镍铁RAW MELTING材料从红土镍矿低次
公开(公告)号：EP2599885A1
公开(公告)日：2013-06-05
申请号：EP11812277.9
申请日：2011-07-13
申请人： Sumitomo Metal Mining Co., Ltd.
发明人： KOBAYASHI Hiroshi , NAKAI Osamu , SHIBAYAMA Keisuke , NAKAI Takayuki , OZAKI Yoshitomo , TOKI Norihisa , TAKAHASHI Junichi , TAN Toshirou
IPC分类号： C22B23/00 , C22B1/02 , C22B1/16 , C22B3/04 , C22B3/20 , C22B3/44 , C22B7/00 , C22B23/02 , C22C33/04
CPC分类号： C22B1/02 , C22B3/0005 , C22B3/12 , C22B3/44 , C22B23/005 , C22B23/021 , C22B23/023 , C22B23/0461 , Y02P10/234
摘要： Provided is a method for producing ferronickel from a nickel sulfide or a mixed sulfide containing nickel and cobalt, obtained by hydrometallurgy of nickel oxide ore or obtained from scraps or products in process. The method for producing a ferronickel raw material is to form the ferronickel raw material from a nickel sulfide or a mixed sulfide containing nickel sulfide and cobalt sulfide, wherein treatments are performed through the following steps: (1) redissolution step, (2) deferrization step, (3) solvent extraction step, (4) hydroxylation step, (5) roasting step, and (6) washing and calcining step.
摘要翻译：提供了一种用于由镍硫化物或混合硫化物含有镍和钴镍铁制造的方法，通过氧化镍矿的湿法冶金获得或从工艺废料或产物获得。用于制造镍铁原料的方法是塑造由镍硫化物或混合硫化物含镍硫化物和硫化钴镍铁原料，worin处理通过下列步骤实施：（1）再溶解步骤，（2）除铁步骤，（3）溶剂萃取步骤，（4）氢氧化工序，（5）焙烧步骤，和（6）洗涤和煅烧步骤。

5. 发明公开

EP2492364A1 WET SMELTING PLANT FOR NICKEL OXIDE ORE AND METHOD FOR OPERATING SAME 审中-公开
标题翻译： HYDROMETALLURGISCHE ANLAGEFÜRNICKELOXIDERZ UND BETRIEBSVERFAHRENDAFÜR
公开(公告)号：EP2492364A1
公开(公告)日：2012-08-29
申请号：EP10824776.8
申请日：2010-10-01
申请人： Sumitomo Metal Mining Co., Ltd.
发明人： NAKAI Osamu , KITAZAKI Toru , HEGURI Shinichi , OZAKI Yoshitomo , SHIBAYAMA Keisuke
IPC分类号： C22B23/00 , C22B3/44
CPC分类号： C22B23/04 , C22B3/02 , C22B23/0407 , Y02P10/234
摘要： In a hydrometallurgical plant of a nickel laterite ore having a plurality of lines of treatment facilities, the hydrometallurgical plant of the nickel laterite ore which is, even when a serious trouble will occur in said treatment facilities, capable of minimizing decrease in throughput caused by this, and restoring a normal operation state early, after eliminating the serious trouble, and an operation method thereof.
A hydrometallurgical plant of a nickel laterite ore having a plurality of lines, as treatment facilities including a pretreatment step, a leaching step, a solid-liquid separation step, a neutralization step, a zinc removal step, a sulfurization step and a detoxification step as one line, wherein a coupling pipeline having a valve is installed between a liquid sending pipeline from the solid-liquid separation step to the neutralization step in each line and/or between a liquid sending pipeline from the sulfurization step to the detoxification step in each line.
摘要翻译：在具有多条处理设备的镍红土矿的湿法冶金设备中，即使在所述处理设备中将发生严重故障的镍红土矿石的湿法冶金设备也能够最小化由此产生的吞吐量降低并且在消除严重故障之后提前恢复正常操作状态及其操作方法。一种具有多条线的镍红土矿的湿法冶金装置，作为包括预处理步骤，浸出步骤，固液分离步骤，中和步骤，除锌步骤，硫化步骤和解毒步骤的处理设备，作为一条线，其中具有阀的联接管道安装在从固液分离步骤到每条生产线中的中和步骤的送液管道之间和/或从每个生产线中的硫化步骤到排毒步骤的送液管道之间。

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