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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
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hideki Sasaki , Yasumasa Kan , Hiroyuki Mitsui
CPC classification number: C01G49/06 , C01P2006/80 , C22B23/043 , C22B23/0461 , Y02P10/212
Abstract: 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：US09752211B2
公开(公告)日：2017-09-05
申请号：US14382737
申请日：2013-03-01
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroyuki Mitsui , Osamu Nakai , Satoshi Matsubara
CPC classification number: C22B23/0461 , C22B3/04 , C22B23/0423 , Y02P10/234
Abstract: A method for improving the filterability in separating a zinc sulfide, produced by applying sulfurization treatment to a post-neutralization solution containing zinc together with nickel and cobalt in a dezincification step in a hydrometallurgical process for nickel oxide ore. The method includes a neutralization reaction step of neutralizing leachate in a neutralization tank, a separation step of separating neutralized slurry into a neutralized sediment and a post-neutralization solution by adding flocculant to the neutralized slurry, a measuring step of measuring the viscosity of the post-neutralization solution, a step of storing the post-neutralization solution in a storage tank, and a transfer step of transferring the stored post-neutralization solution to a dezincification reaction tank used in a dezincification step subsequent to a neutralization step.
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公开(公告)号：US09651200B2
公开(公告)日：2017-05-16
申请号：US14760020
申请日：2013-12-10
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Osamu Nakai , Satoshi Matsubara , Hiroyuki Mitsui , Kenji Tachi , Masayuki Oku
IPC: F17D3/01 , F17D1/08 , F04B41/06 , C22B3/00 , F04B15/02 , F17D1/14 , B01J3/02 , C22B23/00 , F04B49/08
CPC classification number: F17D3/01 , B01J3/02 , C22B23/00 , C22B23/043 , F04B15/02 , F04B41/06 , F04B49/08 , F17D1/088 , F17D1/14 , Y10T137/0352 , Y10T137/0379 , Y10T137/776 , Y10T137/85978 , Y10T137/86163 , Y10T137/87314 , Y10T137/87507
Abstract: A slurry-transporting facility equipped with a plurality of pump-equipment circuits, whereby a stop of slurry supply to a transport destination at the time of switchover between the pump-equipment circuits for use is prevented to make an efficient operation possible. The slurry-transporting facility includes: pipe arrangements which branch out from a feed tank into the plurality of circuits; a transport pump provided in each of the pipe arrangement; a first valve provided upstream from the transport pump; a second valve provided downstream from the transport pump; and a uniting pipe arrangement formed by joining of the pipe arrangements at a predetermined position and connected to a LT heater. The uniting pipe arrangement is provided with a third valve configured to control the transportation of ore slurry to the LT heater and a pressure gauge configured to measure a pressure in the uniting pipe arrangement.
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公开(公告)号：US09410226B2
公开(公告)日：2016-08-09
申请号：US14237593
申请日：2012-11-01
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroyuki Mitsui , Keisuke Shibayama , Hirofumi Shoji , Tatsuya Higaki , Yoji Kyoda , Osamu Nakai
CPC classification number: C22B23/0407 , B02C19/00 , C22B1/00 , C22B23/005
Abstract: Disclosed is a method for producing an ore slurry that can suppress a rise in the viscosity of the ore slurry and consequently prevent a failure in transporting the slurry, and also to provide a metal refining method utilizing such a slurry producing method. The present invention includes: a pulverizing/classifying step of pulverizing raw material ores and classifying the resulting ores at a predetermined classifying point so that oversized ore particles are removed so as to obtain a coarse ore slurry composed of undersized ore particles; a grain size measuring step of measuring the grain size of the resulting coarse ore slurry; and an ore slurry condensing step of loading the coarse ore slurry to a solid-liquid separation device and separating and removing moisture contained in the coarse ore slurry therefrom so as to condense ore components.
Abstract translation: 公开了一种能够抑制矿浆的粘度上升的矿石浆料的制造方法，防止了浆料的输送失败，并且提供了利用这种浆料生产方法的金属精炼方法。 本发明包括：粉碎/分级步骤，将原料矿石粉碎并在预定分级点对所得矿石进行分级，以便除去过大的矿石颗粒，以获得由过小的矿石颗粒组成的粗矿浆料; 测定所得粗矿浆料的粒径的粒度测定工序; 以及将粗矿石浆料装载到固液分离装置并从其中分离除去粗矿浆中含有的水分，以使矿石成分浓缩的矿浆冷凝工序。
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公开(公告)号：US10442715B2
公开(公告)日：2019-10-15
申请号：US15542485
申请日：2015-09-15
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroyuki Mitsui , Osamu Nakai , Keisuke Shibayama , Sho Shirai
Abstract: The present invention provides a chromium-containing water treatment method that allows treatment of water that contains chromium (chromium-containing water) at low cost. A chromium-containing water treatment method according to the present invention comprises: a reduction step in which chromium-containing water 11 and a liquid 12 containing 5-50 ppm of hydrogen sulfide are mixed, and the mixture is adjusted to pH 3.5 or lower and ORP 200-400 mV by adding an acid 13 thereto, so as to reduce chromium contained in the water; and a precipitation separation step in which a neutralizing agent is added to a solution 11′ obtained via the reduction step so as to adjust the solution 11′ to pH 8-9, thereby precipitating and separating, as a hydroxide, the reduced chromium contained in the solution.
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Patent Agency Ranking
公开(公告)号：US09945007B2
公开(公告)日：2018-04-17
申请号：US14382632
申请日：2013-03-01
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroyuki Mitsui , Osamu Nakai , Satoshi Matsubara
CPC classification number: C22B23/043 , C22B3/04 , C22B23/0461 , C22B23/0469 , Y02P10/234
Abstract: The present invention provides a hydrometallurgical method for nickel oxide ore, wherein the plant can be smoothly started up without imposing a load onto a filter cloth for a separation treatment of zinc sulfide, and the amount of residual zinc in a mother liquor for nickel recovery can be reduced to 1 mg/L. In the plant start-up after the completion of a periodic inspection, a post-neutralization solution is controlled to return to a neutralization reaction tank via circulation piping by adjustment of a switching valve in flow piping without sulfurizing post-neutralization solution. When the flow rate and/or the temperature of the post-neutralization solution circulated reaches a predetermined value, a sulfurization treatment is applied to the post-neutralization solution in the dezincification reaction tank to form zinc-sulfide-containing mother liquor for nickel recovery and adjust the switching valve. Zinc-sulfide-containing mother liquor for nickel recovery is transferred to a filter apparatus via transfer piping.
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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
Applicant: Sumitomo Metal Mining Co., Ltd.
Inventor： Hideki Sasaki , Yoshitomo Ozaki , Manabu Enomoto , Hirofumi Shouji , Tatsuya Higaki , Hiroyuki Mitsui , Yasumasa Kan
IPC: C01G49/06
CPC classification number: C01G49/06 , C01P2004/61 , C22B3/44 , Y02P10/234
Abstract: 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)
Abstract translation: 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：US10457565B2
公开(公告)日：2019-10-29
申请号：US15724624
申请日：2017-10-04
Applicant: Sumitomo Metal Mining Co., Ltd.
Inventor： Hideki Sasaki , Hiroyuki Mitsui , Yasumasa Kan
Abstract: 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：US10125408B2
公开(公告)日：2018-11-13
申请号：US15561695
申请日：2015-12-08
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tomoaki Yoneyama , Hiroyuki Mitsui , Manabu Enomoto
Abstract: Provided is a method for manufacturing a nickel and cobalt mixed sulfide that is capable of stabilizing nickel and cobalt concentrations in the sulfidation end solution at low levels and of limiting decreases in nickel and cobalt recovery rates without increasing cost even when processing with a sulfuric acid acidic solution containing nickel and cobalt and a high iron ions concentration as the sulfidation start solution. This method generates a sulfidation reaction by blowing hydrogen sulfide gas into a sulfuric acid acidic solution comprising nickel and cobalt to obtain a mixed sulfide, wherein: the sulfuric acid acidic solution, which is the sulfidation start solution, contains iron ions at a rate of 1.0-4.0 g/L; and the sulfidation reaction is generated by blowing hydrogen sulfide gas into the sulfidation start solution and adding sodium hydrogensulfide (NaHS) obtained by absorbing hydrogen sulfide gas-containing exhaust gas, generated by the sulfidation, in an alkaline solution.
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公开(公告)号：US20180273411A1
公开(公告)日：2018-09-27
申请号：US15542485
申请日：2015-09-15
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroyuki Mitsui , Osamu Nakai , Keisuke Shibayama , Sho Shirai
CPC classification number: C02F9/00 , C02F1/5236 , C02F1/66 , C02F1/70 , C02F2101/22 , C22B3/44
Abstract: The present invention provides a chromium-containing water treatment method that allows treatment of water that contains chromium (chromium-containing water) at low cost. A chromium-containing water treatment method according to the present invention comprises: a reduction step in which chromium-containing water 11 and a liquid 12 containing 5-50 ppm of hydrogen sulfide are mixed, and the mixture is adjusted to pH 3.5 or lower and ORP 200-400 mV by adding an acid 13 thereto, so as to reduce chromium contained in the water; and a precipitation separation step in which a neutralizing agent is added to a solution 11′ obtained via the reduction step so as to adjust the solution 11′ to pH 8-9, thereby precipitating and separating, as a hydroxide, the reduced chromium contained in the solution.
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