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公开(公告)号：US09752209B2
公开(公告)日：2017-09-05
申请号：US14784336
申请日：2014-04-14
发明人： Go Ohara , Hideki Sasaki , Yasumasa Kan , Masaki Imamura
CPC分类号： C22B3/22 , B03B5/34 , B03B7/00 , B03C1/025 , B03C1/30 , B03C2201/20 , C01G49/06 , C22B7/005 , Y02P10/234
摘要： A method is provided for separating a leach residue from which a hematite-containing material capable of being used as a raw material for ironmaking can be obtained. A method also is provided for producing hematite for ironmaking from the leach residue. The method utilizes a leach residue as a raw material, the leach residue being obtained from a hydrometallurgical refining plant where a nickel oxide ore treated by a high pressure acid leach process. The method includes, in sequence: a separation step of separating the leach residue into an overflow and an underflow with a wet cyclone; and another separation step of separating the separated overflow into a strong magnetic substance and a weak magnetic substance using magnetic force, wherein a strong-magnetic-field magnetic separator is used in the another separation step using the magnetic force.
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公开(公告)号：US20150023851A1
公开(公告)日：2015-01-22
申请号：US14386172
申请日：2013-01-16
发明人： Hideki Sasaki , Yoshitomo Ozaki , Manabu Enomoto , Hirofumi Shouji , Tatsuya Higaki , Hiroyuki Mitsui , Yasumasa Kan
IPC分类号： C01G49/06
CPC分类号： C01G49/06 , C01P2004/61 , C22B3/44 , Y02P10/234
摘要： Provided is a method for producing hematite for ironmaking, wherein high purity hematite, which can be used as an iron-making raw material, is cheaply and efficiently recovered from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. This method for producing (high purity) hematite for ironmaking in a process of adding a mineral acid and an oxidant to ore containing iron and valuable metals and then leaching the valuable metals under high pressure and high temperature includes (1) a neutralization step of adding a neutralizer to a leachate obtained under high pressure and high temperature to form a leach slurry, (2) a solid-liquid separation step of separating the leach slurry obtained in the neutralization step (1) into a leach residue and the leachate, and (3) a classification step of classifying the leach residue into the hematite and gangue components. (145 words)
摘要翻译： 提供一种用于制造用于炼铁的赤铁矿的方法，其中可以用作制铁原料的高纯度赤铁矿从通过高压酸浸（HPAL）方法生产的含有氧化铁的浸出残渣中被廉价和有效地回收 。 在将含有铁和贵重金属的矿石中添加无机酸和氧化剂，然后在高压和高温下浸出有价值金属的方法中，用于制造（高纯度）赤铁矿的方法包括：（1）中和步骤， 在高压和高温下获得的浸出液的中和剂以形成浸出浆料;（2）将在中和步骤（1）中获得的浸出浆料分离成浸出残渣和渗滤液的固液分离步骤，和 3）将浸出残渣分类为赤铁矿和ang石成分的分级步骤。 （145字）
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公开(公告)号：US09828256B2
公开(公告)日：2017-11-28
申请号：US14777561
申请日：2013-12-12
发明人： Go Ohara , Hideki Sasaki , Yasumasa Kan , Masaki Imamura
CPC分类号： C01G49/06 , C22B3/06 , C22B3/44 , C22B23/00 , Y02P10/234
摘要： Provided is a method for producing hematite for ironmaking, capable of using a conventional Ca-based neutralizing agent and a base rock-derived neutralizing agent other than the Ca-based neutralizing agent. The method is performed by a process of adding a mineral acid and an oxidizing agent to an ore containing iron and a valuable metal and then leaching the valuable metal under high temperature and pressure, and includes (1) a high-pressure acid leaching step, (2) a preliminary neutralization step, (3) a first solid-liquid separation step, (4) a neutralization step, (5) a second neutralization step, (6) a third solid-liquid separation step, (7) a step of adding part of the Fe-enriched slurry as a seed crystal in the neutralization step (4), and (8) a second solid-liquid separation step.
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公开(公告)号：US20160194215A1
公开(公告)日：2016-07-07
申请号：US14915698
申请日：2014-09-04
发明人： Hideki Sasaki , Yasumasa Kan , Hiroyuki Mitsui
IPC分类号： C01G49/06
CPC分类号： C01G49/06 , C01P2006/80 , C22B23/043 , C22B23/0461 , Y02P10/212
摘要： A method of producing (high-purity) hematite for ironmaking includes adding an oxidant and sulfuric acid to nickel oxide ore and then leaching nickel. The method further includes forming a neutralized residue having a sulfur grade exceeding 1.0% by weight by adding a neutralizing agent to leach slurry and being subjected to solid-liquid separation. The neutralizing agent functions to form plaster by reaction with a free sulfuric acid of surplus acid contained in the leach slurry. The leach slurry is a mixture of a leachate and a leach residue obtained after leaching the nickel. The method then includes heating the neutralized residue at a heating temperature of 600° C. or more and 1400° C. or less to form hematite having a sulfur grade of 1.0% or less by weight.
摘要翻译： 制造用于炼铁的（高纯度）赤铁矿的方法包括向氧化镍矿中加入氧化剂和硫酸，然后浸出镍。 该方法还包括通过向浸出浆料中加入中和剂并进行固液分离，形成硫等级超过1.0重量％的中和残渣。 中和剂通过与浸出浆料中所含的剩余酸的游离硫酸反应形成石膏。 浸出浆液是浸出镍后获得的浸出液和浸出残渣的混合物。 然后，该方法包括在600℃以上且1400℃以下的加热温度下加热中和的残渣，形成硫等级为1.0％以下的赤铁矿。
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公开(公告)号：US20160076121A1
公开(公告)日：2016-03-17
申请号：US14785695
申请日：2014-04-14
发明人： Go Ohara , Hideki Sasaki , Yasumasa Kan , Masaki Imamura
CPC分类号： C22B23/043 , C22B3/08 , C22B3/22 , C22B3/44 , C22B23/0415 , C22B23/0461 , C22B34/32 , Y02P10/234
摘要： Provided is a hydrometallurgical process for nickel oxide ore using high pressure acid leaching to be capable of achieving improvement of durability of production facilities, simplification of the production facilities, suppression of the cost and environmental risks caused by compression of the volume of a tailings dam that stores wastes, and separation and recovery of impurity components which can be utilized as a resource. The hydrometallurgical process for nickel oxide ore of recovering nickel and cobalt using the high pressure acid leaching is characterized by including at least one step selected from step (A) (a step of separating and recovering chromite particles), step (B-1) (a step of neutralizing a leachate with a magnesium-based neutralizing agent), and step (B-2) (a step of neutralizing a leach residue slurry with the magnesium-based neutralizing agent).
摘要翻译： 提供了一种使用高压酸浸法的氧化镍矿石的湿法冶金方法，其能够实现生产设备的耐久性的提高，生产设施的简化，成本的抑制以及尾矿坝体积压缩引起的环境风险， 储存废物，分离和回收可用作资源的杂质成分。 使用高压酸浸法回收镍和钴的氧化镍矿的湿法冶金工艺的特征在于包括选自步骤（A）中的至少一个步骤（分离和回收铬铁矿颗粒的步骤），步骤（B-1）（ 使用镁系中和剂中和浸出液的工序）和工序（B-2）（使用镁系中和剂中和浸出残渣的工序）。
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公开(公告)号：US20160289084A1
公开(公告)日：2016-10-06
申请号：US14777561
申请日：2013-12-12
发明人： Go Ohara , Hideki Sasaki , Yasumasa Kan , Masaki Imamura
IPC分类号： C01G49/06
CPC分类号： C01G49/06 , C22B3/06 , C22B3/44 , C22B23/00 , Y02P10/234
摘要： Provided is a method for producing hematite for ironmaking, capable of using a conventional Ca-based neutralizing agent and a base rock-derived neutralizing agent other than the Ca-based neutralizing agent. The method is performed by a process of adding a mineral acid and an oxidizing agent to an ore containing iron and a valuable metal and then leaching the valuable metal under high temperature and pressure, and includes (1) a high-pressure acid leaching step, (2) a preliminary neutralization step, (3) a first solid-liquid separation step, (4) a neutralization step, (5) a second neutralization step, (6) a third solid-liquid separation step, (7) a step of adding part of the Fe-enriched slurry as a seed crystal in the neutralization step (4), and (8) a second solid-liquid separation step.
摘要翻译： 本发明提供一种生产用于炼铁的赤铁矿的方法，其能够使用除Ca基中和剂以外的常规Ca类中和剂和碱岩衍生的中和剂。 该方法是通过向含铁和有价值金属的矿石中添加无机酸和氧化剂，然后在高温高压下浸出有价金属的方法进行的，其包括（1）高压酸浸提工序， （2）初步中和步骤，（3）第一固液分离步骤，（4）中和步骤，（5）第二中和步骤，（6）第三固液分离步骤，（7） 在中和步骤（4）中加入一部分富Fe浆料作为晶种，和（8）第二固液分离步骤。
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公开(公告)号：US09255013B2
公开(公告)日：2016-02-09
申请号：US14386172
申请日：2013-01-16
发明人： Hideki Sasaki , Yoshitomo Ozaki , Manabu Enomoto , Hirofumi Shouji , Tatsuya Higaki , Hiroyuki Mitsui , Yasumasa Kan
CPC分类号： C01G49/06 , C01P2004/61 , C22B3/44 , Y02P10/234
摘要： Provided is a method for producing hematite for ironmaking, wherein high purity hematite, which can be used as an iron-making raw material, is cheaply and efficiently recovered from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. This method for producing (high purity) hematite for ironmaking in a process of adding a mineral acid and an oxidant to ore containing iron and valuable metals and then leaching the valuable metals under high pressure and high temperature includes (1) a neutralization step of adding a neutralizer to a leachate obtained under high pressure and high temperature to form a leach slurry, (2) a solid-liquid separation step of separating the leach slurry obtained in the neutralization step (1) into a leach residue and the leachate, and (3) a classification step of classifying the leach residue into the hematite and gangue components.
摘要翻译： 提供一种用于制造用于炼铁的赤铁矿的方法，其中可以用作制铁原料的高纯度赤铁矿从通过高压酸浸（HPAL）方法生产的含有氧化铁的浸出残渣中被廉价和有效地回收 。 在将含有铁和贵重金属的矿石中添加无机酸和氧化剂，然后在高压和高温下浸出有价值金属的方法中，用于制造（高纯度）赤铁矿的方法包括：（1）中和步骤， 在高压和高温下获得的浸出液的中和剂以形成浸出浆料;（2）将在中和步骤（1）中获得的浸出浆料分离成浸出残渣和渗滤液的固液分离步骤，和 3）将浸出残渣分类为赤铁矿和ang石成分的分级步骤。
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公开(公告)号：US09890055B2
公开(公告)日：2018-02-13
申请号：US14915698
申请日：2014-09-04
发明人： Hideki Sasaki , Yasumasa Kan , Hiroyuki Mitsui
CPC分类号： C01G49/06 , C01P2006/80 , C22B23/043 , C22B23/0461 , Y02P10/212
摘要： A method of producing (high-purity) hematite for ironmaking includes adding an oxidant and sulfuric acid to nickel oxide ore and then leaching nickel. The method further includes forming a neutralized residue having a sulfur grade exceeding 1.0% by weight by adding a neutralizing agent to leach slurry and being subjected to solid-liquid separation. The neutralizing agent functions to form plaster by reaction with a free sulfuric acid of surplus acid contained in the leach slurry. The leach slurry is a mixture of a leachate and a leach residue obtained after leaching the nickel. The method then includes heating the neutralized residue at a heating temperature of 600° C. or more and 1400° C. or less to form hematite having a sulfur grade of 1.0% or less by weight.
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公开(公告)号：US10457565B2
公开(公告)日：2019-10-29
申请号：US15724624
申请日：2017-10-04
发明人： Hideki Sasaki , Hiroyuki Mitsui , Yasumasa Kan
摘要： Provided is a production method for refining iron oxide (hematite), which has such a low sulfur content as to be used as a raw material for ironmaking from a leach residue containing iron oxide, the leach residue being produced by a high pressure acid leach (HPAL) process and being a raw material that can be cheaply and stably procured. In the method of producing (high purity) hematite for ironmaking by a process of adding an oxidant and sulfuric acid to nickel oxide ore and then leaching nickel, a leach residue obtained after the leaching of nickel is heated to 600° C. or more, and preferably 800° C. or more and 1400° C. or less.
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公开(公告)号：US20180037470A1
公开(公告)日：2018-02-08
申请号：US15724624
申请日：2017-10-04
发明人： Hideki Sasaki , Hiroyuki Mitsui , Yasumasa Kan
CPC分类号： C01G49/06 , C01P2006/80 , C22B3/22 , C22B23/043 , Y02P10/212
摘要： Provided is a production method for refining iron oxide (hematite), which has such a low sulfur content as to be used as a raw material for ironmaking from a leach residue containing iron oxide, the leach residue being produced by a high pressure acid leach (HPAL) process and being a raw material that can be cheaply and stably procured. In the method of producing (high purity) hematite for ironmaking by a process of adding an oxidant and sulfuric acid to nickel oxide ore and then leaching nickel, a leach residue obtained after the leaching of nickel is heated to 600° C. or more, and preferably 800° C. or more and 1400° C. or less.
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