WO1988002408A1 - Method of concentration of difficult-to-concentrate oxidized copper ore - Google Patents

Method of concentration of difficult-to-concentrate oxidized copper ore Download PDF

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Publication number
WO1988002408A1
WO1988002408A1 PCT/SU1986/000097 SU8600097W WO8802408A1 WO 1988002408 A1 WO1988002408 A1 WO 1988002408A1 SU 8600097 W SU8600097 W SU 8600097W WO 8802408 A1 WO8802408 A1 WO 8802408A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper
ore
pulp
sulphidation
easy
Prior art date
Application number
PCT/SU1986/000097
Other languages
English (en)
French (fr)
Russian (ru)
Inventor
Nuraly Sultanovich Bekturganov
Sergei Vladimirovich Belyaev
Dzhantore Nurlanovich Abishev
Vitaly Pavlovich Malyshev
Gulzhazira Kenzhegazinovna Khairova
Svetlana Pavlovna Sim
Dmitry Vasilievich Sologub
Zhakhan Makhmutovich Makhmutov
Alexandr Fedorovih Chunin
Vladimir Ivanovich Revnivtsev
Irik Shagitovich Sataev
Marklen Yakovlevich Ryskin
Solomon Izralievich Sobol
Vladimir Vasilievich Popkov
Sergei Ivanovich Kapitonov
Petr Trofimovich Zhmurko
Nikolai Vladimirovich Matveenko
Bela Shoilevna Zadova
Ljudmila Alexandrovna Strelskaya
Vladimir Stepanovich Chechetkin
Gennady Nikolaevich Smirnov
Valery Konstantinovich Laikin
Original Assignee
Khimiko-Metallurgichesky Institut Tsentralno-Kazak
Vsesojuzny Nauchno-Issledovatelsky I Proektny Inst
Gosudarstvenny Institut Po Proektirovaniju Predpri
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
Priority to CA000514188A priority Critical patent/CA1289274C/en
Priority to FR8610972A priority patent/FR2602797B1/fr
Application filed by Khimiko-Metallurgichesky Institut Tsentralno-Kazak, Vsesojuzny Nauchno-Issledovatelsky I Proektny Inst, Gosudarstvenny Institut Po Proektirovaniju Predpri filed Critical Khimiko-Metallurgichesky Institut Tsentralno-Kazak
Priority to BR8607219A priority patent/BR8607219A/pt
Priority to AU67766/87A priority patent/AU604006B2/en
Priority to DE19863690783 priority patent/DE3690783T1/de
Priority to DE19863690783 priority patent/DE3690783C2/de
Priority to GB8812447A priority patent/GB2204507B/en
Priority to JP62500330A priority patent/JPH01501070A/ja
Priority to PCT/SU1986/000097 priority patent/WO1988002408A1/ru
Priority to CN87102448.9A priority patent/CN1011294B/zh
Publication of WO1988002408A1 publication Critical patent/WO1988002408A1/ru

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G3/00Compounds of copper
    • C01G3/12Sulfides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B1/00Conditioning for facilitating separation by altering physical properties of the matter to be treated
    • B03B1/04Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/02Froth-flotation processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00Obtaining noble metals
    • C22B11/04Obtaining noble metals by wet processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00Obtaining copper
    • C22B15/0002Preliminary treatment
    • C22B15/001Preliminary treatment with modification of the copper constituent
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Definitions

  • the prevailing level of technology of the consuming ores is dependent on the mineralogical composition of the USA divided into the following types: sulphide, mixed (oxidized-sulphide) and oxidized.
  • sulphide mixed (oxidized-sulphide)
  • oxidized oxidized
  • the enrichment of sulphide ore by conventional methods of flotation does not cause trouble. Acidic and mixed ores are, as a rule, very convenient. 5
  • the degree of extraction of copper and other valuable components to the concentrate is valuable, for example, gray.
  • oxidized copper ore is mixed with iron sulfides (alcohol or pyrrhotite) and silk or silk-earth metals. Further, the mixture is burnt at a temperature of 500-800 ° C in a neutral or industrial environment in the presence of distilled water. The purpose of this treatment is to convert the oxidized copper compounds to sulfides, which are easily excreted by selective flotation. This and the preceding process, this method is energy intensive, and its implementation releases toxic fumes and dust. The resulting concentrate extracts 82% of copper and 72% of silver.
  • the copper-containing process is separated from the solid phase by filtering.
  • this method is only used for copper recovery.
  • the method for extracting the sulfur is ineffective because the connection cannot be detected.
  • the use of hydroxide sodium is also undesirable due to its high cost of living, toxicity and the difficulty of handling it.
  • the task was solved by the method of extinguishing copper-rich, highly-processed ore, which excludes the pulp; sulphidation of the received pulp of the element gray; Flotation of pulses with the receipt of a sulphide concentrate, which is, according to the invention, is at risk of damage to the pulses.
  • the proposed method makes it possible to increase the degree of copper extraction to an increase of 92.6%. Otherwise, it is possible to take advantage of the secondary extraction method also with a high degree of extraction reaching 90.2%. Further, the invention makes it possible to significantly reduce harmful emissions into the environmental medium. In addition, the invention eliminates the cost of the process as a result of the exclusion of the stage of leaching of ore and of the copper by-product.
  • Sulphidation of pulses is recommended in the presence of a sulphate of sodium or a mineral containing a sulphate of sodium, such as a rehabilitation. This increases the degree of copper extraction and increases it by 98.6%. It is desirable to reduce the weight of the sulphate of sodium or muscle in order to reduce the damage to the environment so that there is one mass part of the element ⁇ ⁇ 88/02408 ⁇ / 51.86 / 0
  • the pulp After sulphidation, the pulp is prepared and flotated, and sulphide concentrates are obtained, from which the metal is extracted and processed, and the copper is mined.
  • the acidified, ore-rich ore is ground to a particle size of 0.74 mm_. Then, the fraction containing the indicated particles in the amount of 50-100 is mixed, mixed with water and the pulp is mixed with a solid and liquid phase (1: 3).
  • the pulp produced by this method introduces an elementary serum with a mass ratio of sulfur to an oxidized copper of 0.2–1.5: 1, which is by weight of 0.5–1% by weight. sera. Further, the pulp, according to the invention, sulphides the melted sulfur.
  • the specified quantity of sulphide which is necessary for sulphidation, is divided by the fact that its quantity is less than 0.2 parts by weight. it is not sufficient for the conversion of the residues of all copper contained in the ore, and its quantity, which is higher than the upper, results in 1.5 mass parts, does not increase the resultant loss of output.
  • the sulphidation period is 20–120 min. E ⁇ v ⁇ emya ⁇ edelyae ⁇ sya ⁇ em, ch ⁇ ⁇ i sul ⁇ i- di ⁇ vanii, ⁇ d ⁇ lzhayuschemsya least 20 min, not bude ⁇ d ⁇ s ⁇ ignu- ⁇ ⁇ ⁇ b ⁇ az ⁇ vanie sul ⁇ id ⁇ v with ⁇ shim vy ⁇ d ⁇ m and ⁇ vedenie ⁇ ea ⁇ tsii sul ⁇ idi ⁇ vaniya b ⁇ lee 120 min not ⁇ iv ⁇ di ⁇ ⁇ d ⁇ - ⁇ lni ⁇ eln ⁇ mu uzelicheniyu vy ⁇ da sul ⁇ id ⁇ v but only udlinya- e ⁇ process that is undesirable.
  • Sulshiduyu pulses can be controlled and in the presence of atrocious or tempest.
  • the addition of the indicated acids also increases the yield of honey and silver sulgides.
  • the recommended consumption of specified materials is 0.7 to 3 parts by weight. for I part by weight elemental element.
  • chlorides of sodium or calcium in quantities less than 0.7 mass parts. , there is no significant increase in the yield of sulphides.
  • va ⁇ ian ⁇ ⁇ susches ⁇ zleniya iz ⁇ b ⁇ e ⁇ eniya Isa ⁇ ⁇ dnuyu ⁇ islennuyu ⁇ udn ⁇ b ⁇ ga ⁇ imuyu copper ⁇ udu due melchayu ⁇ d ⁇ s ⁇ de ⁇ zhaniya of her 70 chas ⁇ its ⁇ azme ⁇ m meyaee 0.7 mm.
  • a hermetic reactor for example, an autoclave
  • the proposed invention commercially advantageous differs from the known methods.
  • An important advantage of the proposed method is an increase in the degree of extraction of copper. If there is a ore, gold, or platinum in the ore, the indicated metals may also be removed completely.
  • the proposed method in general minimizes the cost of the gain due to the exclusion of the graduation rate, the quick release, the rest, and the rest ⁇ ⁇ 88/02408 ⁇ ⁇ 86 / 0009
  • EXAMPLE I Sulfuric oxidized copper ore contained 1.3% of copper and 10.4 g / t of silver, including 0.93% of copper 0 contained in minerals (from % of copper was found in the form of cc. The specified ore is crushed before it contains 70% of the particles with a size less than 0.74 mm. The crushed ore is mixed with the factory with a mass ratio of ⁇ : F, equal to 1: 1.5. Due to the pulp produced in this way, the elementary system is used with a mass ratio of 0.2-1.5: 1 for copper oxide.
  • the pulp is loaded into the autoclave with a volume of I l, equipped with a stirrer, and heated to a temperature of ⁇ 60 ° ⁇ . ⁇ réelle matters ⁇ réelle ⁇ réelle ⁇ ⁇ 88/02408 ⁇ / ⁇ 86 /
  • the elementary series is, and this is, a quantity of 1.2: 1.
  • the results of copper extraction are • a flat percentage in the specified range of the variation in the cost of the sodium sulfate and the human condition is shown in Table 3.
  • the original ore contained 1.22% of copper, including 1.10% of the minerals contained in minerals (ores, malachite, and azure).
  • We were enriched under the conditions of the type I Sprint and ⁇ : W ⁇ : 0.5 and the quantity of the enterable season, equal to 0.75: 1.
  • Copper recovery was 85.0%.
  • the resulting copper-sulfide concentration in the amount of 1.5-3 of the mass of the original ore is returned to the production of the new source pulp.
  • the waste of the sulfur used for sulphidation is reduced, since the reduction of the sulfur is increased by the sulfur in the concentrate.
  • the results of ore beneficiation in the case of a waste of 0.2: 1, depending on the amount of return, are shown in Table 6. ) 88/02408 ⁇ S ⁇ / 5 ⁇ '86/0009

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrolytic Production Of Metals (AREA)
PCT/SU1986/000097 1986-07-18 1986-10-04 Method of concentration of difficult-to-concentrate oxidized copper ore WO1988002408A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
CA000514188A CA1289274C (en) 1986-07-18 1986-07-18 Method of concentration of rebellious oxidized copper ores
FR8610972A FR2602797B1 (fr) 1986-07-29 1986-07-29 Procede d'enrichissement de minerais de cuivre oxydes difficilement enrichissables
BR8607219A BR8607219A (pt) 1986-07-29 1986-10-04 Processo de concentracao de minerios de cobre oxidados complexos
AU67766/87A AU604006B2 (en) 1986-07-29 1986-10-04 Method of concentration of refractory oxidized copper ores
DE19863690783 DE3690783T1 (hu) 1986-07-29 1986-10-04
DE19863690783 DE3690783C2 (de) 1986-10-04 1986-10-04 Verfahren zur Aufbereitung oxydischer Kupfererze
GB8812447A GB2204507B (en) 1986-07-29 1986-10-04 Concentration of oxidized copper ores
JP62500330A JPH01501070A (ja) 1986-07-29 1986-10-04 処理の困難な酸化物系銅鉱石の濃縮方法
PCT/SU1986/000097 WO1988002408A1 (en) 1986-07-29 1986-10-04 Method of concentration of difficult-to-concentrate oxidized copper ore
CN87102448.9A CN1011294B (zh) 1986-07-29 1987-04-01 氧化铜矿的选矿方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8610972A FR2602797B1 (fr) 1986-07-29 1986-07-29 Procede d'enrichissement de minerais de cuivre oxydes difficilement enrichissables
PCT/SU1986/000097 WO1988002408A1 (en) 1986-07-29 1986-10-04 Method of concentration of difficult-to-concentrate oxidized copper ore

Publications (1)

Publication Number Publication Date
WO1988002408A1 true WO1988002408A1 (en) 1988-04-07

Family

ID=26225408

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SU1986/000097 WO1988002408A1 (en) 1986-07-18 1986-10-04 Method of concentration of difficult-to-concentrate oxidized copper ore

Country Status (8)

Country Link
JP (1) JPH01501070A (hu)
CN (1) CN1011294B (hu)
AU (1) AU604006B2 (hu)
BR (1) BR8607219A (hu)
DE (1) DE3690783T1 (hu)
FR (1) FR2602797B1 (hu)
GB (1) GB2204507B (hu)
WO (1) WO1988002408A1 (hu)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106733207A (zh) * 2017-03-22 2017-05-31 凉山矿业股份有限公司 一种应用于铜钼硫化矿分离浮选中的浮选调整剂及其应用方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105964411B (zh) * 2016-06-22 2018-03-13 东北大学 一种多极性基非硫化矿浮选组合捕收剂及制备和使用方法
CN108722678A (zh) * 2017-04-14 2018-11-02 武汉科技大学 一种氧化铜矿的浮选方法
CN111632749A (zh) * 2020-04-28 2020-09-08 西北矿冶研究院 一种从氧化铜酸浸渣中回收氧化铜的选矿方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU108670A1 (ru) * 1956-09-04 С.И. Соболь Метод сульфидировани никел и кобальта в окисленных рудах
SU59343A1 (ru) * 1939-10-09 1941-03-31 И.Н. Шоршер Способ подготовки олов нных руд и первичных концентратов к флотации
US2989394A (en) * 1958-12-19 1961-06-20 Newmont Exploration Ltd Heat treatment and concentration of oxide ores
SU333208A1 (ru) * 1969-12-22 1972-03-21 Государственный научно исследовательский институт цветных металлов Способ переработки окисленных и смешанныхмедных руд
US3728430A (en) * 1970-12-14 1973-04-17 Anlin Co Method for processing copper values
SU709707A1 (ru) * 1978-06-12 1980-01-15 Норильский Ордена Ленина И Ордена Трудового Красного Знамени Горно- Металлургический Комбинат Им. А.П. Завенягина Способ переработки пульпы

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2367022A (en) * 1945-01-09 norton
US2332145A (en) * 1942-05-23 1943-10-19 Harshaw Chem Corp Manufacture of copper sulphide
JPS5746125B2 (hu) * 1973-10-01 1982-10-01
GB1598454A (en) * 1977-03-15 1981-09-23 Sherritt Gordon Mines Ltd Leaching of metal sulphides
LU85385A1 (fr) * 1984-05-28 1986-01-29 Mines Fond Zinc Vieille Procede de lixiviation de sulfures contenant du zinc et du fer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU59343A1 (ru) * 1939-10-09 1941-03-31 И.Н. Шоршер Способ подготовки олов нных руд и первичных концентратов к флотации
SU108670A1 (ru) * 1956-09-04 С.И. Соболь Метод сульфидировани никел и кобальта в окисленных рудах
US2989394A (en) * 1958-12-19 1961-06-20 Newmont Exploration Ltd Heat treatment and concentration of oxide ores
SU333208A1 (ru) * 1969-12-22 1972-03-21 Государственный научно исследовательский институт цветных металлов Способ переработки окисленных и смешанныхмедных руд
US3728430A (en) * 1970-12-14 1973-04-17 Anlin Co Method for processing copper values
SU709707A1 (ru) * 1978-06-12 1980-01-15 Норильский Ордена Ленина И Ордена Трудового Красного Знамени Горно- Металлургический Комбинат Им. А.П. Завенягина Способ переработки пульпы

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
A.A. ABRAMOV, "Tekhnologia Obogaschenia Okislennykh I Smeshannykh Rud Tsvetnykh Metallov", 1986, Nedra (Moscow), pages 70-71. *
D.S. SOBOLEV et al., "Praktika Obogaschenia Rud Tsvetnykh I Redkikh Metallov", Vol. II, 1960, Gosudarstvennoe Nauchnotekhnicheskoe Izdatelstvo Literatury Po Gornomu Delu (Moscow), page 45. *
REFERATIVNY ZHURNAL "KHIMIA", 19E, PRIRODNYE I ORGANICHESKIE SOEDINENIYA I IKH SINTETICHESKIE ANALOGI, N.5, 1986, (VINITI, MOSCOW, USSR), SHIVRIN G.N. et al., "Vliyanie Sernistogo Gaza Na Sulfidi-rovanie Rastvorennykh Tsvetnykh Metallov Elementnoi Seroi", Referat N 5 L 94; & DEP. KRASNOYAR. IN-T TSV. MET. KRASNOYARSK, 1985, Rus. *
REFERATIVNY ZHURNAL "KHIMIA", 19E, PRIRODNYE I ORGANICHESKIE SOEDINENIYA I IKH SINTETICHESKIE ANALOGI, N.6, 1986, (VINITI, MOSCOW, USSR), SHIVRIN G.N. et al., "Termodinamicheskaya Otsenka Vozmozhnosti Sulfidirovania Rastvorennykh Metallov Sulfidami Metallov", Referat N 6 L 185; & DEP. KRASNOYAR. IN-T TSV. MET. KRASNOYARSK, 1985, Rus. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106733207A (zh) * 2017-03-22 2017-05-31 凉山矿业股份有限公司 一种应用于铜钼硫化矿分离浮选中的浮选调整剂及其应用方法
CN106733207B (zh) * 2017-03-22 2019-07-19 凉山矿业股份有限公司 一种应用于铜钼硫化矿分离浮选中的浮选调整剂及其应用方法

Also Published As

Publication number Publication date
JPH01501070A (ja) 1989-04-13
GB2204507B (en) 1990-06-27
AU604006B2 (en) 1990-12-06
GB8812447D0 (en) 1988-07-20
FR2602797B1 (fr) 1988-11-25
CN1011294B (zh) 1991-01-23
AU6776687A (en) 1988-04-21
BR8607219A (pt) 1988-11-01
FR2602797A1 (fr) 1988-02-19
DE3690783T1 (hu) 1989-01-19
GB2204507A (en) 1988-11-16
JPH0527696B2 (hu) 1993-04-22
CN87102448A (zh) 1988-10-12

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