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Title:
ORE DRESSING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/112734
Kind Code:
A1
Abstract:
Provided is an ore dressing method that can obtain a low-arsenic-grade concentrate from a high-arsenic-grade starting material.　The ore dressing method has: a repulping step for obtaining a mineral slurry by adding water to a starting material that contains an arsenic-free sulfide mineral, i.e., a sulfide mineral that does not contain arsenic, and an arsenic-containing sulfide mineral, i.e., a copper sulfide mineral that contains arsenic; a pH adjustment step for adjusting the pH of the liquid phase of the mineral slurry to at least 10; a conditioning step for adding an oxidizing agent and an alkali metal xanthate to the mineral slurry; and a flotation step for carrying out flotation using the mineral slurry to effect separation of the starting material into: a floating ore that has a higher grade of arsenic-free sulfide mineral than the starting material, and a sedimented ore that has a higher grade of arsenic-containing sulfide mineral than the starting material. The starting material contains 4.4-5.8 weight parts of arsenic per 100 weight parts of copper.

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Inventors:
HIRAJIMA TSUYOSHI (JP)
MIKI HAJIME (JP)
SUYANTARA GDE PANDHE WISNU (JP)
SASAKI KEIKO (JP)
TANAKA YOSHIYUKI (JP)
TAKIDA ERI (JP)
Application Number:
PCT/JP2022/044657
Publication Date:
June 22, 2023
Filing Date:
December 05, 2022
Export Citation:
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Assignee:
UNIV KYUSHU NAT UNIV CORP (JP)
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B1/11; B03D1/008; B03D1/012; C22B1/00; C22B15/00; B03D101/02; B03D103/02
Foreign References:
JP2020104095A2020-07-09
JP2011156521A2011-08-18
JP2010133004A2010-06-17
JP2012241249A2012-12-10
JP2021074640A2021-05-20
JP2006239553A2006-09-14
Attorney, Agent or Firm:
YAMAUCHI PATENT ATTORNEYS (JP)
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