AU2002333937A1 - A method for purifying the solution in the hydrometallurgical processing of copper - Google Patents
A method for purifying the solution in the hydrometallurgical processing of copperInfo
- Publication number
- AU2002333937A1 AU2002333937A1 AU2002333937A AU2002333937A AU2002333937A1 AU 2002333937 A1 AU2002333937 A1 AU 2002333937A1 AU 2002333937 A AU2002333937 A AU 2002333937A AU 2002333937 A AU2002333937 A AU 2002333937A AU 2002333937 A1 AU2002333937 A1 AU 2002333937A1
- Authority
- AU
- Australia
- Prior art keywords
- copper
- chloride
- solution
- chloride solution
- alkaline
- 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.)
- Granted
Links
- 239000010949 copper Substances 0.000 title claims description 92
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 89
- 229910052802 copper Inorganic materials 0.000 title claims description 89
- 238000000034 method Methods 0.000 title claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 42
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 38
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 29
- 238000002386 leaching Methods 0.000 claims description 23
- 238000001556 precipitation Methods 0.000 claims description 23
- 239000002994 raw material Substances 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 235000019738 Limestone Nutrition 0.000 claims description 8
- 239000006028 limestone Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 150000001805 chlorine compounds Chemical group 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 239000000243 solution Substances 0.000 description 35
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 9
- 239000003153 chemical reaction reagent Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 5
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 2
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 2
- 229960003280 cupric chloride Drugs 0.000 description 2
- 229940045803 cuprous chloride Drugs 0.000 description 2
- 239000012527 feed solution Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- QYFMQRSFRCFZNM-UHFFFAOYSA-K copper;sodium;trichloride Chemical compound [Na+].[Cl-].[Cl-].[Cl-].[Cu+2] QYFMQRSFRCFZNM-UHFFFAOYSA-K 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Description
A METHOD FOR PURIFYING THE SOLUTION IN THE HYDROMETALLURGICAL PROCESSING OF COPPER
The invention relates to the removal of bivalent copper from copper chloride solution in connection with the hydrometallurgical production of copper. In the production process of copper, a copper-bearing raw material is leached into a chloride-bearing solution. The copper chloride solution formed in the leaching, which contains both mono- and bivalent copper, undergoes bivalent copper removal at least in part by precipitation, and the copper(l) chloride solution is conducted to further treatment. Precipitation of the bivalent copper takes place as alkaline copper chloride precipitation. The alkaline copper chloride formed is leached as copper(ll) chloride either separately or in connection with raw material leaching, and is used in copper raw material leaching.
In US patent publication 6,007,600 is described a method for the hydrometallurgical production of copper from a copper-bearing raw material such as copper sulfide concentrate. According to the method, the raw material is leached as counter current leaching with a sodium chloride- copper chloride solution, in several stages, to achieve monovalent copper(l) chloride solution. As there always remains an amount of both bivalent copper chloride and impurities composed of other metals, the solution undergoes bivalent copper reduction and solution purification. The pure cuprous chloride solution is precipitated with the aid of sodium hydroxide into copper oxidule, and the oxidule is further reduced into elemental copper. The sodium chloride solution formed in connection with copper oxidule precipitation is further treated in chlorine alkali electrolysis, from where the chlorine gas and/or chloride solution obtained is used in raw-material leaching, the sodium hydroxide produced in electrolysis is used in oxidule precipitation, and the hydrogen produced is used in the reduction of elemental copper.
In the method described above, the copper chloride solution produced as a result of the raw material leaching also contains some copper(ll) chloride, or cupric chloride. The cupric chloride is reduced into monovalent cuprous chloride with the aid of granular copper. The method is often quite practicable, but removal of impurities does not substantially take place in connection with reduction.
The method now developed relates to the further treatment of copper chloride solution produced in the chloride leaching of a copper raw material, such as copper sulfide concentrate. According to this method, at least part of the bivalent copper chloride (CuCI2) contained in the copper chloride solution is removed from the solution by precipitating the copper, with the aid of a suitable reagent as alkaline copper(ll) chloride or copper(ll) oxychloride. Sodium hydroxide and limestone are at least preferable reagents. The precipitated alkaline copper chloride is leached either separately or it is leached in connection with the raw material leaching, and the copper(ll) chloride solution produced is used in raw-material leaching. The copper(l) chloride solution (CuCI), from which the bivalent copper has been removed, is conducted via solution purification to further treatment for elemental copper production.
The copper(ll) chloride contained in the copper chloride solution can be precipitated from the solution, for example with the aid of sodium hydroxide. Precipitation takes place according to the following reaction: 2 CuCI2 + 3 NaOH => Cu2CI(OH)3 + 3 NaCl (1)
It is preferable to precipitate the produced copper(ll) oxychloride again, in oxychloride leaching, by means of which the precipitated Cu2+ is leached as copper(ll) chloride, CuCI2. The following reaction takes place in the leaching: Cu2CI(OH)3 + 3 HCI => 2 CuCI2 + 3 H20 (2)
It is clear that leaching does not necessarily require its own process step, but can be performed in connection with copper raw material leaching.
Bivalent copper is well known as a good oxidizing agent, and copper(ll) chloride can thereby be used, together with sodium chloride, in raw material leaching. The use of bivalent copper in sulfide raw material leaching is described, for example in US patent 5,487,819. Similarly, in connection with US patent 6,007,600, Figure 3 it is also suggested that a part of the copper(l) chloride solution is oxidized with the aid of chlorine gas into copper(ll) chloride and is conducted back to leaching. In the method according to this invention, copper(ll) chloride is not first reduced as monovalent and then re- oxidized, but the bivalent copper is precipitated out of a solution containing mainly the copper chloride and thereafter leached as copper(ll) chloride so that it can be utilized in copper raw material leaching.
If precipitation of copper(ll) chloride is performed in a copper hydro- metallurgical manufacturing process to which is connected alkali electrolysis, the required sodium hydroxide will be obtained as the product of electrolysis. The hydrochloric acid necessary for leaching can also be produced from the hydrogen and chlorine generated in the alkali electrolysis. Sodium hydroxide and hydrochloric acid are, however, inexpensive reagents and they can be used even though they might not be produced in the process.
Copper(ll) oxychloride precipitation can be carried out not only with the aid of sodium hydroxide: it is also possible - and economical - to be done with the aid of limestone, CaC03. As is well-known, limestone is a cheap reagent. Then, instead of reaction (1), the following reaction takes place:
2 CuCI2 + 1.5 CaCO3 + 1.5 H20 => Cu2CI(OH)3 + 1.5 CaCI2 + 1.5 C02 (3) When the copper raw material is a sulfidic material such as sulfide concentrate, the final product will be an iron-bearing precipitate, which also contains the sulfur contained in the concentrate, mainly as elemental sulfur. Part of the sulfur may oxidize, however, and form sulfates in the solution. When copper(ll) oxychloride precipitation is performed with the aid of limestone, the calcium chloride produced in the precipitation removes the
sulfates from the copper(l) chloride solution according to the following reaction:
Ca2+ + S04 2" + n H20 => CaS04 H20 (4)
In practical tests, it has been found that, in addition to bivalent copper precipitation, iron precipitation also takes place. Thus, by means of alkaline copper chloride precipitation, it is possible to remove the sulfates and iron, as well as the bivalent copper, from copper(l) chloride solution. Copper(ll) oxychloride precipitation, or alkaline copper(ll) chloride precipitation, can be carried out in two stages, where sodium hydroxide is used as the reagent in one stage and limestone in the other. When the iron and sulfates are already removed at this stage, they do not disturb the solution purification, where the copper(l) chloride solution is purified of other metals in order to achieve metallic copper with as high purity as possible.
When a copper raw material such as sulfide concentrate is leached with chloride solution, forming a copper chloride solution of which the further processing is based on monovalent copper chloride treatment, it is preferable to remove the bivalent copper from the solution as thoroughly as possible. A means for the reduction of bivalent copper has previously been presented, and above is described the precipitation of bivalent copper. In some cases it is, however, preferable to combine these two separation methods in such a way, that part of the bivalent copper is removed, for example with the aid of scrap copper, and the rest is removed by precipitation in the manner described above.
The invention is described further by means of the enclosed example:
Example
Copper(ll) oxychloride precipitation was carried out in a continuously- operating, laboratory-scale arrangement. The equipment included two consecutive mixing reactors, R1 and R2. The operating temperature was 80°C and the delay 2h/reactor.
The feed solution, the contents of which can be seen in Table 1 , was conducted to the first reactor, R1. The NaCl content of the feed solution was 300 g/l. A precipitation reagent containing 250 g/l CaC03 and 150 g/l NaCl, was fed into reactor R1. The amount of limestone was according to the stoichiometry of reaction (3). A precipitation reagent containing 160 g/l NaOH and 150 g/l NaCl was fed into reactor R2, so that the pH of the reactor remained at the value of 4.
The concentrations of the product solution obtained from the latter reactor, R2, can be seen in Table 1. It can be seen from the results that copper(ll) oxychloride precipitation removed totally the bivalent copper and iron and also 80% of the sulfates from the copper chloride solution. Zinc, on the other hand, did not essentially precipitate at all, and it should be removed in connection with solution purification.
Table 1
Alkaline copper chloride and gypsum were identified by X-ray diffraction from the deposit obtained from reactor R2. The copper(ll) oxychloride sediment was recovered as thickened slime. The slime was leached at a temperature of 25°C in HCI solution, so that the pH was maintained at a value of 0.7 for about an hour. The slime was easy to dissolve, and the leaching waste contained about 0.5 % copper.
Claims (7)
1. A method for the removal of copper(ll) chloride from a mainly copper(l) chloride-bearing copper chloride solution, which solution is formed by leaching a sulfidic copper raw material counter current chloride leaching characterized in that the copper(ll) chloride contained in the copper chloride solution is removed by precipitation, at least partly, as alkaline copper(ll) chloride under atmospheric conditions; the copper(l) chloride solution is conducted to further treatment for the production of metallic copper, the alkaline copper(ll) chloride is leached and the copper(ll) chloride solution formed is conducted to copper raw material leaching.
2. A method according to claim 1 , characterized in that copper(ll) chloride is precipitated from a copper chloride solution as alkaline copper(ll) chloride with the aid of sodium hydroxide, NaOH.
3. A method according to claim 1 , characterized in that copper(ll) chloride is precipitated from a copper chloride solution as alkaline copper(ll) chloride with the aid of limestone, CaC03.
4. A method according to claim 1 , characterized in that the iron contained in the copper chloride solution is removed.
5. A method according to claim 1 , characterized in that the sulfate contained in the copper chloride solution is mainly removed.
6. A method according to claim 1 , characterized in that copper(ll) chloride is precipitated from a copper chloride solution as alkaline copper(ll) chloride with the aid of limestone, CaC03, and sodium hydroxide, NaOH.
7. A method according to claim 1 , characterized in that bivalent copper is removed by reduction from the copper chloride solution, first with a copper-bearing material and thereafter by precipitation of the remaining bivalent copper as alkaline copper(ll) chloride.
A method according to claim 1 , characterized in that the alkaline copper(ll) chloride formed is leached as its own process step.
A method according to claim 1 , characterized in that that the alkaline copper(ll) chloride formed is leached in connection with copper raw material leaching.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20012055 | 2001-10-24 | ||
| FI20012055A FI110953B (en) | 2001-10-24 | 2001-10-24 | A process for purifying a solution in a copper hydrometallurgical process |
| PCT/FI2002/000819 WO2003035916A1 (en) | 2001-10-24 | 2002-10-23 | A method for purifying the solution in the hydrometallurgical processing of copper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2002333937A1 true AU2002333937A1 (en) | 2003-07-03 |
| AU2002333937B2 AU2002333937B2 (en) | 2007-11-29 |
Family
ID=8562109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2002333937A Expired AU2002333937B2 (en) | 2001-10-24 | 2002-10-23 | A method for purifying the solution in the hydrometallurgical processing of copper |
Country Status (21)
| Country | Link |
|---|---|
| US (1) | US7294168B2 (en) |
| EP (1) | EP1438439B1 (en) |
| JP (1) | JP2005506449A (en) |
| KR (1) | KR20040060939A (en) |
| CN (1) | CN1266291C (en) |
| AR (1) | AR036941A1 (en) |
| AT (1) | ATE318938T1 (en) |
| AU (1) | AU2002333937B2 (en) |
| BR (1) | BR0213341B1 (en) |
| CA (1) | CA2464398C (en) |
| DE (1) | DE60209566D1 (en) |
| EA (1) | EA005989B1 (en) |
| ES (1) | ES2258667T3 (en) |
| FI (1) | FI110953B (en) |
| MX (1) | MXPA04003776A (en) |
| PE (1) | PE20030482A1 (en) |
| PL (1) | PL196483B1 (en) |
| PT (1) | PT1438439E (en) |
| WO (1) | WO2003035916A1 (en) |
| YU (1) | YU31504A (en) |
| ZA (1) | ZA200402337B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1727916B1 (en) * | 2004-03-25 | 2014-11-12 | Intec International Projects Pty Ltd | Recovery of metals from oxidised metalliferous materials |
| FI117138B (en) * | 2004-10-14 | 2006-06-30 | Outokumpu Oy | Production of metallic copper by reducing copper (I) oxide by hydrogen |
| FI117389B (en) * | 2004-12-28 | 2006-09-29 | Outokumpu Oy | A process for hydrometallurgical treatment of a sulphide concentrate containing several precious metals |
| TWI421492B (en) * | 2007-09-28 | 2014-01-01 | Hitachi Chemical Co Ltd | Metal ion sensor, metal ion sensor system and portable metal ion sensor system |
| CN102345013B (en) * | 2010-08-06 | 2013-03-06 | 沈阳有色金属研究院 | Method for producing blister copper by reduction smelting of cuprous oxide converted from cuprous chloride |
| CN106995887B (en) * | 2017-05-09 | 2018-11-09 | 刘慧南 | A kind of copper sulfide produces the technique and its system of metallic copper or copper compound |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL31921A (en) * | 1969-03-27 | 1973-03-30 | Elstein B | Production of copper compounds and copper powder |
| SE352107B (en) * | 1969-07-01 | 1972-12-18 | Montedison Spa | |
| CA1063809A (en) * | 1975-12-11 | 1979-10-09 | Godefridus M. Swinkels | Hydrometallurgical process for metal sulphides |
| US4632738A (en) * | 1982-09-03 | 1986-12-30 | Great Central Mines Ltd. | Hydrometallurgical copper process |
| US4594132A (en) * | 1984-06-27 | 1986-06-10 | Phelps Dodge Corporation | Chloride hydrometallurgical process for production of copper |
| AP538A (en) | 1992-06-26 | 1996-09-18 | Intec Pty Ltd | Production of metal from minerals |
| FI104837B (en) * | 1997-08-29 | 2000-04-14 | Outokumpu Oy | Process for Hydrometallurgical Copper Production |
| FI108864B (en) * | 2000-12-20 | 2002-04-15 | Outokumpu Oy | Process for dissolving copper concentrate |
-
2001
- 2001-10-24 FI FI20012055A patent/FI110953B/en not_active IP Right Cessation
-
2002
- 2002-10-10 PE PE2002001000A patent/PE20030482A1/en active IP Right Grant
- 2002-10-23 CA CA2464398A patent/CA2464398C/en not_active Expired - Lifetime
- 2002-10-23 CN CNB028211138A patent/CN1266291C/en not_active Expired - Lifetime
- 2002-10-23 MX MXPA04003776A patent/MXPA04003776A/en active IP Right Grant
- 2002-10-23 PL PL368526A patent/PL196483B1/en unknown
- 2002-10-23 EP EP02801925A patent/EP1438439B1/en not_active Expired - Lifetime
- 2002-10-23 US US10/492,893 patent/US7294168B2/en not_active Expired - Lifetime
- 2002-10-23 JP JP2003538416A patent/JP2005506449A/en active Pending
- 2002-10-23 AU AU2002333937A patent/AU2002333937B2/en not_active Expired
- 2002-10-23 WO PCT/FI2002/000819 patent/WO2003035916A1/en not_active Ceased
- 2002-10-23 BR BRPI0213341-5A patent/BR0213341B1/en active IP Right Grant
- 2002-10-23 PT PT02801925T patent/PT1438439E/en unknown
- 2002-10-23 AT AT02801925T patent/ATE318938T1/en not_active IP Right Cessation
- 2002-10-23 AR ARP020104008A patent/AR036941A1/en unknown
- 2002-10-23 KR KR10-2004-7005727A patent/KR20040060939A/en not_active Withdrawn
- 2002-10-23 EA EA200400353A patent/EA005989B1/en not_active IP Right Cessation
- 2002-10-23 DE DE60209566T patent/DE60209566D1/en not_active Expired - Lifetime
- 2002-10-23 ES ES02801925T patent/ES2258667T3/en not_active Expired - Lifetime
- 2002-10-23 YU YU31504A patent/YU31504A/en unknown
-
2004
- 2004-03-25 ZA ZA200402337A patent/ZA200402337B/en unknown
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