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WO2018127979A1 - Procédé de traitement de minéral de cuivre contenant de l'arsenic - Google Patents

Procédé de traitement de minéral de cuivre contenant de l'arsenic Download PDF

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Publication number
WO2018127979A1
WO2018127979A1 PCT/JP2017/000324 JP2017000324W WO2018127979A1 WO 2018127979 A1 WO2018127979 A1 WO 2018127979A1 JP 2017000324 W JP2017000324 W JP 2017000324W WO 2018127979 A1 WO2018127979 A1 WO 2018127979A1
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WO
WIPO (PCT)
Prior art keywords
copper
arsenic
leaching
treating
sulfuric acid
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2017/000324
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English (en)
Japanese (ja)
Inventor
良介 辰巳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JX Nippon Mining and Metals Corp
Original Assignee
JX Nippon Mining and Metals Corp
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 JX Nippon Mining and Metals Corp filed Critical JX Nippon Mining and Metals Corp
Priority to PCT/JP2017/000324 priority Critical patent/WO2018127979A1/fr
Publication of WO2018127979A1 publication Critical patent/WO2018127979A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
    • C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • 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

Definitions

  • the present invention relates to a method for treating arsenic-containing copper minerals (arsenous pyrite, arsenic tetrahedral copper or the like).
  • An oxidation roasting method and a non-oxidation roasting method are known in which copper concentrate is roasted in an oxidizing atmosphere or a non-oxidizing atmosphere to volatilize and remove arsenic. The obtained roasted ore is used as a raw material for dry smelting to recover copper. Further, a sulfuric acid roasting method (treatment method for converting to sulfate) in which concentrate and sulfuric acid are kneaded and roasted in a furnace has been reported (Non-Patent Documents 1 to 3). Arsenic in the copper mineral is dissolved in the leachate and recovered, or volatilized and removed by high-temperature roasting.
  • Non-Patent Document 4 Arsenic in the copper mineral forms scorodite with Fe that coexists during leaching, and is precipitated and removed in the residue.
  • an object of the present invention is to provide a method for treating an arsenic-containing copper mineral that efficiently leaches copper from an arsenic-containing copper mineral and easily recovers arsenic.
  • the present invention completed on the basis of the above knowledge is, in one aspect, a method for treating an arsenic-containing copper mineral including a step of leaching copper from an arsenic-containing copper mineral with sulfuric acid at 100 to 290 ° C.
  • the step of leaching the copper is performed under atmospheric pressure.
  • copper is leached with sulfuric acid at 150 to 200 ° C. in the step of leaching copper.
  • the copper leaching rate in the step of leaching copper is 50% or more.
  • the copper leaching time is 1 to 5 hours in the step of leaching copper.
  • the pulp concentration of the sulfuric acid solution in the step of leaching the copper is 40% or less.
  • the leachate obtained in the step of leaching copper is diluted, neutralized, and then heated while oxidizing to synthesize scorodite.
  • the method further includes the step of:
  • the method for treating an arsenic-containing copper mineral of the present invention further includes a step of recovering copper by solvent extraction from the liquid remaining after removing the scorodite obtained in the step of synthesizing the scorodite.
  • an impurity removal treatment is performed on the post-extraction solution after solvent extraction of copper in the step of recovering copper by the solvent extraction.
  • the method further includes the step of using the obtained liquid as a diluent when diluting the leachate obtained in the step of leaching copper.
  • FIG. 1 is a flowchart showing an embodiment of a method for treating an arsenic-containing copper mineral of the present invention.
  • Arsenic-containing copper minerals to be treated in the present invention are arsenous copper ore (Cu 3 AsS 4 ), arsenic tetrahedral copper (Cu 12 As 4 S 13 ), chalcopyrite (CuFeS 2 ), arsenite (FeAsS) and sulfide. It is a copper mineral containing an arsenic component, such as a mineral mixed with arsenic.
  • copper is leached from sulfuric acid at 100 to 290 ° C. from the arsenic-containing copper mineral.
  • a reaction represented by the following formula occurs, and for example, arsenite can be oxidized and decomposed into copper sulfate and arsenous acid by the oxidizing power of sulfuric acid.
  • the leaching temperature is preferably 150 ° C. or higher, and more preferably 180 ° C. or higher.
  • an arsenic-containing copper mineral of the present invention it becomes possible to treat at a lower temperature than the conventional dry method, and arsenic can be easily recovered by being dissolved in a leachate without volatilizing. it can.
  • pressure and air blowing are indispensable as described above, and thus a pressure-resistant and acid-resistant device such as an autoclave is necessary. Blowing (or blowing of oxygen-containing gas) is unnecessary, and the arsenic-containing copper mineral can be satisfactorily treated even under atmospheric pressure. Therefore, according to the present invention, copper and arsenic can be efficiently separated and recovered from a copper mineral containing arsenic.
  • the sulfuric acid used in the present invention is preferably concentrated sulfuric acid having a concentration of 95% or more, more preferably concentrated sulfuric acid having a concentration of 98% or more. That is, the sulfuric acid used in the present invention is preferably hot concentrated sulfuric acid at a temperature of 100 to 290 ° C. and a concentration of 95% or more.
  • the reaction represented by the above formula proceeds better, and arsenous copper ore can be oxidized and decomposed into copper sulfate and arsenous acid better.
  • copper is leached from the arsenic-containing copper mineral.
  • copper can be leached at a leaching rate of 50% or more.
  • copper can be further leached at a leaching rate of 60% or more, 70% or more, 80% or more, or 90% or more.
  • the copper leaching time may be 1 to 10 hours, may be 1 to 6 hours, or may be 1 to 5 hours.
  • the pulp concentration of the sulfuric acid solution in the step of leaching copper is preferably 40% or less.
  • the pulp concentration of the sulfuric acid solution is 40% or less, the copper leaching rate is further improved.
  • sulfuric acid may be consumed by reaction, and there exists a possibility that a sulfuric acid may be depleted and it may become a form of a roasting process instead of a leaching.
  • Pulp concentration concentrate mass (g) ⁇ (concentrate mass + concentrated sulfuric acid mass (g)) x 100 (%)
  • concentration of concentrated sulfuric acid mass is calculated by the amount of concentrated sulfuric acid solution (mL) ⁇ the concentration of concentrated sulfuric acid (g / cm 3 ).
  • the gas generated during the leaching process is converted to SO 2 through an exhaust gas process, and may be used again as a sulfuric acid raw material for leaching copper from the sulfuric acid plant.
  • the residue includes, for example, gangue and gypsum.
  • Test Example 1 250 g of copper concentrate containing copper mineral containing arsenic was dissolved in 500 ml of sulfuric acid (concentration 98%), and leaching treatment was performed for 3 hours.
  • the chemical analysis value of the copper concentrate was 21% for Cu grade and 7% for As.
  • MLA mineral analysis system
  • 85 mass% or more 85 mass% or more was in the form of arsenite.
  • the pulp concentration of the sulfuric acid solution was 20%.
  • leaching temperatures 120 ° C., 150 ° C., and 180 ° C. Further, the leaching process was performed under atmospheric pressure without blowing oxygen-containing gas. Copper and arsenic were collected from the obtained copper leaching solution, and their leaching rate was measured. The test results are shown in Table 1 and FIG.
  • Test Example 2 When 25 g of copper concentrate containing arsenic similar to Test Example 1 was oxidized and roasted in air at 200 ° C., the leaching rate of copper into water was 4 to 6%. Moreover, when oxidative roasting was performed in air at 400 ° C., the leaching rate of copper into water was 22%. Further, when 25 g of copper concentrate containing arsenic similar to Test Example 1 was non-oxidized and roasted, the volatilization reaction of arsenic did not proceed unless it was 550 ° C. or higher. As can be seen from Test Examples 1 and 2, according to the present invention, copper leaching treatment can be performed at a lower temperature than in the dry method.
  • Test Example 4 The copper leaching solution obtained in Test Example 1 was controlled to pH 1.5 with Ca (OH) 2 and subjected to solvent extraction with Covolis Japan Co., Ltd. 20 vol% -LIX984N, confirming that copper was extracted. did.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé de traitement d'un minéral de cuivre contenant de l'arsenic, qui permet de lixivier efficacement le cuivre à partir d'un minéral de cuivre contenant de l'arsenic et de récupérer facilement l'arsenic. Ce procédé de traitement de minéral de cuivre contenant de l'arsenic comprend une étape de lixiviation de cuivre à partir d'un minéral de cuivre contenant de l'arsenic à l'aide d'acide sulfurique à une température de 100 à 290 °C.
PCT/JP2017/000324 2017-01-06 2017-01-06 Procédé de traitement de minéral de cuivre contenant de l'arsenic Ceased WO2018127979A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/000324 WO2018127979A1 (fr) 2017-01-06 2017-01-06 Procédé de traitement de minéral de cuivre contenant de l'arsenic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/000324 WO2018127979A1 (fr) 2017-01-06 2017-01-06 Procédé de traitement de minéral de cuivre contenant de l'arsenic

Publications (1)

Publication Number Publication Date
WO2018127979A1 true WO2018127979A1 (fr) 2018-07-12

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4720011Y1 (fr) * 1967-02-01 1972-07-06
JPS52101630A (en) * 1976-02-23 1977-08-25 Sumitomo Metal Mining Co Treating method of sulphide deposits on copper refining process
JP2008031504A (ja) * 2006-07-27 2008-02-14 Nikko Kinzoku Kk 黄銅鉱を含有する硫化銅鉱の浸出方法
JP2011144437A (ja) * 2010-01-18 2011-07-28 Sumitomo Metal Mining Co Ltd 含銅鉄硫化物からの銅の分離回収方法
JP2011195878A (ja) * 2010-03-18 2011-10-06 Sumitomo Metal Mining Co Ltd 銅硫化物からの銅の回収方法
JP2015017010A (ja) * 2013-07-10 2015-01-29 住友金属鉱山株式会社 スコロダイトの製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4720011Y1 (fr) * 1967-02-01 1972-07-06
JPS52101630A (en) * 1976-02-23 1977-08-25 Sumitomo Metal Mining Co Treating method of sulphide deposits on copper refining process
JP2008031504A (ja) * 2006-07-27 2008-02-14 Nikko Kinzoku Kk 黄銅鉱を含有する硫化銅鉱の浸出方法
JP2011144437A (ja) * 2010-01-18 2011-07-28 Sumitomo Metal Mining Co Ltd 含銅鉄硫化物からの銅の分離回収方法
JP2011195878A (ja) * 2010-03-18 2011-10-06 Sumitomo Metal Mining Co Ltd 銅硫化物からの銅の回収方法
JP2015017010A (ja) * 2013-07-10 2015-01-29 住友金属鉱山株式会社 スコロダイトの製造方法

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