WO2015093363A1 - Procédé pour supprimer l'élution du manganèse - Google Patents

Procédé pour supprimer l'élution du manganèse Download PDF

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Publication number
WO2015093363A1
WO2015093363A1 PCT/JP2014/082647 JP2014082647W WO2015093363A1 WO 2015093363 A1 WO2015093363 A1 WO 2015093363A1 JP 2014082647 W JP2014082647 W JP 2014082647W WO 2015093363 A1 WO2015093363 A1 WO 2015093363A1
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WO
WIPO (PCT)
Prior art keywords
manganese
slurry
elution
sedimentation basin
nickel
Prior art date
Application number
PCT/JP2014/082647
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English (en)
Japanese (ja)
Inventor
友彦 横川
服部　靖匡
Original Assignee
住友金属鉱山株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 住友金属鉱山株式会社 filed Critical 住友金属鉱山株式会社
Publication of WO2015093363A1 publication Critical patent/WO2015093363A1/fr
Priority to PH12016501165A priority Critical patent/PH12016501165A1/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/206—Manganese or manganese compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities

Definitions

  • the present invention relates to a method for suppressing elution of manganese, which suppresses elution of manganese from manganese precipitates in a slurry containing manganese precipitates stored in a sedimentation basin.
  • the hydrometallurgical method of nickel oxide ore using this high-pressure acid leaching method is an ore treatment step in which nickel oxide ore is pulverized to a predetermined size to form a slurry, and sulfuric acid is added to the ore slurry under high temperature and high pressure.
  • a leaching process high pressure acid
  • pre-neutralization a pre-neutralization process for performing a neutralization (hereinafter also referred to as “pre-neutralization”) treatment before the leaching slurry is washed in multiple stages, and a pre-neutralization process.
  • a solid-liquid separation process (hereinafter also referred to as “CCD process”) in which the leaching slurry thus obtained is subjected to solid-liquid separation into a leaching residue and a leachate containing an impurity element together with nickel and cobalt while being washed in multiple stages.
  • the high-pressure acid leaching method has been put to practical use as a method for recovering metal from low-grade nickel oxide ore.
  • impurity components such as manganese and magnesium are leached in the leaching slurry, in addition to elements for recovery purposes such as nickel and cobalt.
  • the leached manganese and the like are neutralized by adding an alkali after recovering nickel and cobalt.
  • the sediment such as manganese is finally transferred as a slurry to a sedimentation basin called a tailing dam. In the sedimentation basin, the sediment is settled and the supernatant liquid is released into the sea.
  • Patent Document 2 describes a method for selectively and efficiently precipitating manganese.
  • Patent Document 3 describes a method of promoting aggregation and precipitation by adding a heavy metal inorganic compound during the neutralization treatment. However, Patent Document 3 does not mention the behavior of heavy metal concentration during solid-liquid separation after precipitation.
  • the manganese concentration is usually controlled to a concentration that does not affect the environment.
  • the manganese concentration may fluctuate rapidly, especially the concentration may increase, and the cause is unknown. This makes it difficult to control the manganese concentration. Therefore, in the sedimentation basin, it is required to control the manganese concentration based on knowledge about the change in manganese concentration during solid-liquid separation.
  • This invention is proposed in view of such a situation, and it aims at providing the elution suppression method of manganese which suppresses that manganese elutes from a manganese deposit in a sedimentation basin.
  • the manganese elution suppression method according to the present invention is a manganese elution suppression method for suppressing manganese elution from the manganese precipitate in the slurry containing manganese precipitate stored in the sedimentation basin.
  • the pH of the slurry is 8.0 to 9.0.
  • the present invention by setting the pH of the slurry containing manganese precipitates stored in the sedimentation basin to 8.0 to 9.0, it is possible to suppress manganese elution from the manganese precipitates, and to precipitate the manganese precipitates.
  • the manganese concentration of the obtained supernatant can be lowered.
  • FIG. 1 is a diagram showing the relationship between changes in manganese concentration and pH of slurry stored in a sedimentation basin.
  • FIG. 2 is a graph showing the relationship between the manganese concentration and the pH of the slurry from which the solid content has been removed from the sedimentation basin.
  • the manganese elution suppression method is a method for suppressing elution of manganese from the manganese precipitate by setting the pH of the slurry containing the manganese precipitate stored in the sedimentation basin to 8.0 to 9.0.
  • the slurry stored in the settling basin is, for example, limestone in the leaching residue after the nickel and cobalt are recovered from the leach residue and leachate produced when high pressure acid leaching of nickel and cobalt from nickel oxide ore It is a slurry containing a precipitate produced by neutralization with powder and slaked lime powder. That is, in order to prevent the manganese concentration in the wastewater stored in the settling basin after the neutralization treatment of the wastewater containing leaching residue and filtrate produced by, for example, nickel oxide ore hydrometallurgy, It can be applied to suppress elution of manganese.
  • Nickel oxide ore contains manganese and aluminum as impurities in addition to nickel and cobalt. For this reason, when leaching residue and filtrate are neutralized with limestone powder or slaked lime powder, precipitates such as manganese and aluminum are generated.
  • the pH of the waste water containing the leach residue and filtrate is preferably 8.0 to 10.0. If the pH of the wastewater is too low, poor manganese precipitation occurs. If the pH is too high, the amount of neutralizing agent used is increased, which is not preferable.
  • Slurry containing precipitates such as manganese and aluminum is once stored in a sedimentation basin before being discharged into the sea or river.
  • the sedimentation basin includes a dam.
  • a slurry containing manganese precipitates is stored for a while to deposit sediments such as manganese precipitates. Then, after the sediment is settled, the detoxified supernatant is pumped up and discharged to the outside such as the sea or river.
  • manganese is preferably precipitated as a precipitate and not dissolved in the supernatant, but the manganese concentration in the supernatant is increased.
  • the increase in manganese concentration is related to the pH of the slurry.
  • the manganese concentration increases as the pH of the slurry decreases.
  • the pH of the slurry is considered to decrease as carbon dioxide in the air dissolves and generates protons.
  • the relationship between the pH of the slurry and the manganese concentration can also be seen from the measurement results of the pH and manganese concentration shown in FIG.
  • FIG. 1 shows the results of measuring the pH and manganese concentration of the slurry in the sedimentation basin for about 70 days.
  • the ultimate pH due to the dissolution of carbon dioxide is about 7.7.
  • manganese elution starts when the pH of the slurry falls below 8.5, and the manganese concentration exceeds 1 mg / L when the pH falls below 8.0.
  • This 1 mg / L is a specified value defined by, for example, the National Pollution Control Committee (NPCC) in the Philippines. Therefore, it is necessary to suppress the manganese concentration in the slurry to less than 1 mg / L.
  • NPCC National Pollution Control Committee
  • the time for the slurry pH to reach 8.5 is about 20 days, and after 20 days, elution of manganese due to the decrease in pH starts abruptly, and on the 30th day, manganese elution It can be seen that the concentration of 1 mg / L.
  • the discharge from the sedimentation basin is performed before the pH of the stored slurry falls below 8.0, preferably 8.25. That is, if the slurry pH is maintained within the range of 8.0 to 9.0, preferably within the range of 8.25 to 8.75, elution of manganese is suppressed, and the manganese concentration is 1 mg / L. It can be discharged in a state where the specified value of NPCC is satisfied.
  • the slurry is stored for 30 days or less, preferably 20 days or less, as a method for making the pH of the slurry less than 8.0, preferably less than 8.25.
  • the storage time is 30 days or less, the elution of manganese is suppressed, and the manganese concentration can satisfy less than 1 mg / L.
  • the pH of the slurry is preferably 8.0 to 10.0 when the slurry is discharged to the sedimentation basin.
  • the pH of the slurry is preferably 8.0 to 10.0 when the slurry is discharged to the sedimentation basin.
  • the manganese elution suppression method can suppress an increase in manganese concentration even if the slurry before being discharged into the sea or river is stored in a sedimentation basin that comes into contact with the outside air. Thereby, the method for suppressing elution of manganese can suppress the influence on the environment, and its effect is very large.
  • Example> limestone powder and slaked lime powder are added to wastewater containing manganese produced by high pressure acid leaching for leaching nickel and cobalt from nickel oxide ore to perform neutralization treatment, and slurry containing manganese precipitates is obtained. Obtained.
  • the slurry was discharged into a sedimentation basin.
  • the pH of the slurry when the slurry was discharged into the sedimentation basin was 9.10, and the manganese concentration was 0.3 mg / L.
  • the slurry was allowed to stand for 15 days in a sedimentation basin in an air atmosphere. Thereafter, the supernatant was pumped up to the sea.
  • the pH of the slurry at this time was 8.5, and the manganese concentration was 0.1 mg / L.
  • the slurry was allowed to stand for 40 days in a sedimentation basin in an air atmosphere.
  • the manganese concentration of the slurry was 2.5 mg / L.

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

La présente invention supprime l'élution du manganèse se trouvant dans des sédiments de manganèse présents dans une boue accumulée dans un réservoir de sédimentation. La présente invention règle le pH de la boue comprenant des sédiments de manganèse accumulés dans le réservoir de sédimentation à 8,0 -9,0 et supprime l'élution de manganèse.
PCT/JP2014/082647 2013-12-16 2014-12-10 Procédé pour supprimer l'élution du manganèse WO2015093363A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PH12016501165A PH12016501165A1 (en) 2013-12-16 2016-06-16 Process for suppressing elution of manganese

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-259175 2013-12-16
JP2013259175A JP5861694B2 (ja) 2013-12-16 2013-12-16 マンガンの溶出抑制方法

Publications (1)

Publication Number Publication Date
WO2015093363A1 true WO2015093363A1 (fr) 2015-06-25

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PCT/JP2014/082647 WO2015093363A1 (fr) 2013-12-16 2014-12-10 Procédé pour supprimer l'élution du manganèse

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JP (1) JP5861694B2 (fr)
PH (1) PH12016501165A1 (fr)
WO (1) WO2015093363A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018100809A1 (fr) * 2016-12-01 2018-06-07 住友金属鉱山株式会社 Installation pour évacuer une bouillie de résidus de lixiviation
CN109626461A (zh) * 2018-11-13 2019-04-16 核工业北京化工冶金研究院 一种酸法地浸采铀蒸发池废液加速蒸发的装置及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09248576A (ja) * 1996-03-14 1997-09-22 Taiheiyo Kinzoku Kk マグネシュウムを含有するマンガン酸性溶液からのマンガンの優先的除去法
JP2004049933A (ja) * 2002-07-16 2004-02-19 Ohbayashi Corp 浚渫泥土の処理方法
JP2005350766A (ja) * 2004-05-13 2005-12-22 Sumitomo Metal Mining Co Ltd ニッケル酸化鉱石の湿式製錬方法
JP2010207674A (ja) * 2009-03-09 2010-09-24 Sumitomo Metal Mining Co Ltd 排水からのマンガンの除去方法
JP2011206757A (ja) * 2010-03-10 2011-10-20 Sumitomo Metal Mining Co Ltd アルミニウム、マグネシウムおよびマンガンを含む排水の排水処理方法
JP2012250226A (ja) * 2011-06-01 2012-12-20 Nippon Filter Kk 水処理用固液分離方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09248576A (ja) * 1996-03-14 1997-09-22 Taiheiyo Kinzoku Kk マグネシュウムを含有するマンガン酸性溶液からのマンガンの優先的除去法
JP2004049933A (ja) * 2002-07-16 2004-02-19 Ohbayashi Corp 浚渫泥土の処理方法
JP2005350766A (ja) * 2004-05-13 2005-12-22 Sumitomo Metal Mining Co Ltd ニッケル酸化鉱石の湿式製錬方法
JP2010207674A (ja) * 2009-03-09 2010-09-24 Sumitomo Metal Mining Co Ltd 排水からのマンガンの除去方法
JP2011206757A (ja) * 2010-03-10 2011-10-20 Sumitomo Metal Mining Co Ltd アルミニウム、マグネシウムおよびマンガンを含む排水の排水処理方法
JP2012250226A (ja) * 2011-06-01 2012-12-20 Nippon Filter Kk 水処理用固液分離方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018100809A1 (fr) * 2016-12-01 2018-06-07 住友金属鉱山株式会社 Installation pour évacuer une bouillie de résidus de lixiviation
JP2018090999A (ja) * 2016-12-01 2018-06-14 住友金属鉱山株式会社 浸出残渣スラリーの排出施設
CN109626461A (zh) * 2018-11-13 2019-04-16 核工业北京化工冶金研究院 一种酸法地浸采铀蒸发池废液加速蒸发的装置及方法

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PH12016501165B1 (en) 2016-08-15
PH12016501165A1 (en) 2016-08-15
JP5861694B2 (ja) 2016-02-16
JP2015112590A (ja) 2015-06-22

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