PH12019000428A1 - Hydrometallurgical method for nickel oxide ore with reduced precipitation of gypsum scale - Google Patents

Hydrometallurgical method for nickel oxide ore with reduced precipitation of gypsum scale

Info

Publication number
PH12019000428A1
PH12019000428A1 PH12019000428A PH12019000428A PH12019000428A1 PH 12019000428 A1 PH12019000428 A1 PH 12019000428A1 PH 12019000428 A PH12019000428 A PH 12019000428A PH 12019000428 A PH12019000428 A PH 12019000428A PH 12019000428 A1 PH12019000428 A1 PH 12019000428A1
Authority
PH
Philippines
Prior art keywords
neutralization step
nickel oxide
oxide ore
neutralizing agent
sulfuric acid
Prior art date
Application number
PH12019000428A
Inventor
Noriyuki Nagase
Jiro Hayata
Original Assignee
Sumitomo Metal Mining Co
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.)
Filing date
Publication date
Application filed by Sumitomo Metal Mining Co filed Critical Sumitomo Metal Mining Co
Publication of PH12019000428A1 publication Critical patent/PH12019000428A1/en

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Manufacture And Refinement Of Metals (AREA)

Abstract

A method of suppressing precipitation of gypsum as scale caused by calcium contained in a neutralizing agent added in a preliminary neutralization step or a neutralization step is provided. A hydrometallurgical method for nickel oxide ore includes a HPAL step of adding sulfuric acid to a slurry of nickel oxide ore to perform acid leaching under a high temperature and pressure condition, a preliminary neutralization step of adding a neutralizing agent containing a calcium salt to a leach slurry obtained by the acid leaching process to adjust a pH to 3.0 or more and 3.4 or less, a countercurrent type water washing step of introducing the pH-adjusted leach slurry in the preliminary neutralization step into a countercurrent multistage water washing device to remove a precipitated gypsum together with a leach residue so as to obtain a sulfuric acid aqueous solution containing nickel etc. and having calcium concentration suppressed to not more than its solubility, and a neutralization step of adding a neutralizing agent containing a calcium salt to the sulfuric acid aqueous solution.
PH12019000428A 2018-11-08 2019-11-08 Hydrometallurgical method for nickel oxide ore with reduced precipitation of gypsum scale PH12019000428A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018210405A JP2020076129A (en) 2018-11-08 2018-11-08 Wet smelting method for nickel oxide ore suppressing precipitation of gypsum scale

Publications (1)

Publication Number Publication Date
PH12019000428A1 true PH12019000428A1 (en) 2020-07-06

Family

ID=70723655

Family Applications (1)

Application Number Title Priority Date Filing Date
PH12019000428A PH12019000428A1 (en) 2018-11-08 2019-11-08 Hydrometallurgical method for nickel oxide ore with reduced precipitation of gypsum scale

Country Status (2)

Country Link
JP (1) JP2020076129A (en)
PH (1) PH12019000428A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7296048B1 (en) 2022-03-31 2023-06-22 住友金属鉱山株式会社 Scaling prevention method
JP7273269B1 (en) * 2022-07-28 2023-05-15 住友金属鉱山株式会社 Hydrometallurgical method for nickel oxide ore

Also Published As

Publication number Publication date
JP2020076129A (en) 2020-05-21

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