US3767383A - Refining copper pyrometallurgically by two-stage subatmospheric treatment - Google Patents
Refining copper pyrometallurgically by two-stage subatmospheric treatment Download PDFInfo
- Publication number
- US3767383A US3767383A US00198984A US3767383DA US3767383A US 3767383 A US3767383 A US 3767383A US 00198984 A US00198984 A US 00198984A US 3767383D A US3767383D A US 3767383DA US 3767383 A US3767383 A US 3767383A
- Authority
- US
- United States
- Prior art keywords
- copper
- bath
- oxygen
- sulfur
- precipitate
- 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.)
- Expired - Lifetime
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 135
- 239000010949 copper Substances 0.000 title claims abstract description 135
- 238000011282 treatment Methods 0.000 title abstract description 11
- 238000007670 refining Methods 0.000 title description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 65
- 239000001301 oxygen Substances 0.000 claims abstract description 65
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000010926 purge Methods 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 28
- 239000012535 impurity Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 51
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 29
- 239000004568 cement Substances 0.000 claims description 28
- 239000003638 chemical reducing agent Substances 0.000 claims description 24
- 239000002244 precipitate Substances 0.000 claims description 21
- 238000006477 desulfuration reaction Methods 0.000 claims description 17
- 230000023556 desulfurization Effects 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 238000007885 magnetic separation Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 10
- 239000003570 air Substances 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 239000000295 fuel oil Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 50
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 39
- 229910052717 sulfur Inorganic materials 0.000 abstract description 39
- 239000011593 sulfur Substances 0.000 abstract description 39
- 229910052742 iron Inorganic materials 0.000 abstract description 25
- 229910052711 selenium Inorganic materials 0.000 abstract description 25
- 239000011669 selenium Substances 0.000 abstract description 25
- 229910052714 tellurium Inorganic materials 0.000 abstract description 24
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 abstract description 23
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052785 arsenic Inorganic materials 0.000 abstract description 16
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 16
- 239000011261 inert gas Substances 0.000 abstract description 16
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052797 bismuth Inorganic materials 0.000 abstract description 14
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052718 tin Inorganic materials 0.000 abstract description 14
- 229910052725 zinc Inorganic materials 0.000 abstract description 14
- 239000011701 zinc Substances 0.000 abstract description 14
- 239000002893 slag Substances 0.000 abstract description 9
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 abstract description 7
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 abstract description 7
- 229940112669 cuprous oxide Drugs 0.000 abstract description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 14
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000000155 melt Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 230000006698 induction Effects 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 238000005007 materials handling Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000009489 vacuum treatment Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- C22B15/0026—Pyrometallurgy
- C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
Definitions
- the present invention pertains to refining copper precipitated from solution, and more particularly to refining metallic copper precipitates by pyrometallurgical techniques.
- Metallic copper precipitates can also be obtained by hydrogen reduction of copper-containing process solutions at elevated pressures of 350 pounds per inch at 2- 90C. These. powders are generally finely divided and contain up to about 0.1% sulfur and 0.01% iron.
- metallic copper that contains up to about 5% iron, up to about oxygen, up to about 1% sulfur and at least one volatile impurity selected from the group consisting of arsenic, bismuth, lead, selenium, tellurium, tin, and zinc, after any preliminary beneficiation treatment, is melted in a free-oxygen-containing atmosphere to slag iron and to form a copper bath containing sulfur and oxygen, with the oxygen content being at least in excess of the sulfur content without producing a separate cuprous oxide phase, and at least one other volatile impurity selected from the group consisting of arsenic, bismuth, lead, selenium, tellurium, tin, and zinc.
- a purge gas which can contain free oxygen, is passed through the copper bath while the bath is maintained at subatmospheric pressures below about 0.001 atmosphere to rapidly lower the sulfur content to less than about 0.001%.
- the single phase copper bath contains at least about 0.1%
- the flow of the purge gas is terminated after the sulfur content of the copper bath is lowered to less than about 0.001%, and the bath is subjected to subatmospheric pressures of less than about 0.0002 atmosphere for further refining by volatilizing at least one impurity selected from the group consisting of arsenic, bismuth, lead, selenium, tellurium, tin and zinc from the bath.
- the copper bath is then deoxidized. Before casting, the copper bath can be optionally treated with phosphorus to produce oxygen-free copper.
- a solid reductant is added to the copper bath either during the entire deoxidation treatment or during the latter stages thereof, i.e., when the oxygen content of the bath falls to about 0.05% or less, to lower the oxygen content to about 0.01%, advantageously about 0.005%.
- the copper melt can optionally be completely deoxidized by phosphorus additions thereto.
- the deoxidation treatment with solid carbon is advantageously conducted at subatmospheric pressures less than about 0.01 atmosphere, e.g., between about 0.005 atmosphere and 0.0005 atmosphere.
- the bath is maintained in a state of turbulence by purging with a non-oxidizing gas, i.e., an inert or reducing gas.
- Inert gases such as nitrogen or argon, are advantageously employed as purge gases to minimize the problems associated with dissolved hydrogen at low oxygen contents.
- purge gas flow rates between about 1 and standard cubic feet per hour per square foot of bath surface area are employed to provide the re-.
- the copper bath is desulfurized, refined and deoxidized at temperatures of at least about l,200C. and advantageously at temperatures between about 1,250and 1,400C. to insure rapid and substantially complete desulfurization, refining, and deoxidation.
- the various operations can be conducted in any type of furnace but it has been found advantageous to use induction furnaces to take advantage of the stirring effect of these furnaces. Induction furnaces have the additional advantages of completely eliminating the possibility of contaminating the copper by combustion products of the fuel. An even further advantage of induction furnaces is that they can be readily equipped with appropriate vacuum equipment.
- Cement copper which was derived from the precipitation of copper from sulfate leach solutions on shredded, detinned cans and which contained 0.7% sulfur, 6% oxygen, 1.2% iron, 0.029% arsenic, 0.038% lead, 0.0023% selenium, 0.0007% tellurium and minor amounts of calcium oxide, silica and alumina, was melted in air in an induction furnace, which furnace was equipped with a vacuum unit, to slag the iron, calcium oxide, silica and alumina and to form a copper bath which contains 0.01% iron, 0.30% sulfur, and 1.49% oxygen.
- the surface of the bath was cleared of the slag, and the pressure within the vacuum unit was then lowered to 0.0003 atmosphere while nitrogen at a rate of 15 standard cubic feet per hour per square foot of bath surface area is passed through the bath to lower the sulfur'content to 0.0005%. Purging of the bath with nitrogen is then terminated, and the pressure within the furnace is lowered to 0.0001 atmosphere to further refine the bath. During this stage of the refining operation, the levels of arsenic, lead, selenium, and tellurium are lowered to 0.01%, less than 0.002%, 0.001%, and 0.0003%, respectively. Carbon is then added to the bath, and the bath is again purged with nitrogen at a flow rate of 12 standard cubic feet per square foot of melt surface per hour to lower the oxygen content of the bath to 0.02%. The bath is then cast.
- EXAMPLE I This example confirms thatmolten copper is more readily desulfurized by a simultaneous inert gas purge and vacuum treatment than by a vacuum treatment alone, even with pressures of one-tenth or less of that employed with an inert gas purge.
- the bath initially containing ppm sulfur was simultaneously subjected to subatmospheric pressures and a nitrogen purge at a rate of about 15 standard cubic feet per square foot of surface melt per hour.
- EXAMPLE III Although an inert gas purge greatly improves subatmospheric pressure desulfurization, this example confirms that the inert gas purge interferes with other refining reactions by precluding the attainment of the necessary low pressures and that two-stage subatmospheric pressure treatments are advantageous in providing an overall refining operation.
- Two copper baths one containing 19 ppm selenium and 13 ppm tellurium and the other containing 29 ppm selenium and 11.5 ppm tellurium, were established by heating cement copper to 2,300F. Both baths were oxidizing in that oxygen was present in amounts of more than 1%.
- the bath containing 19 ppm selenium was simultaneously purged with nitrogen at a rate of 15 standard cubic feet per square foot of melt surface area per hour and subjected to subatmospheric pressure between 200 and 250 microns. Samples were taken at various intervals and analyzed for selenium and tellurium contents with the results being shown in Table 2A.
- the bath initially containing 29 ppm selenium was merely subjected to subatmospheric pressures between 15 and 32 microns. Again, samples were periodically taken and analyzed for selenium and tellurium, and the results are reported in Table 2B.
- EXAMPLE IV This example confirms that molten copper is more effectively deoxidized by carbon at subatmospheric pressures with a simultaneous inert gas purge than by hdyrogen bubbled through molten copper.
- a copper bath containing 0.26% oxygen was established, and a hydrogen-nitrogen gaseous mixture containing 75% hydrogen was bubbled through the bath at a rate of 6.9 standard cubic feet per hour which was equivalent to 100 standard cubic feet per square foot of melt surface area per hour, which flow rate insured vigorous agitation of the bath.
- the oxygen content of the bath was determined at various intervals wtih the results being reported in Table 3A.
- the present invention provides a pyrometallurgical process for refining metallic copper precipitated from aqueous solutions.
- the present invention has been described in conjunction with the treatment of cement copper, those skilled in the art will appreciate that the process can be employed to refine melts of electrorefined or electrowon copper that are contaminated with sulfur during melting operations or contain objectionably high quantities of arsenic, bismuth, lead, selenium, tellurium, tin, and zinc.
- a process for refining metallic copper that contains up to about 5% iron, up to about 10% oxygen, up to about 1% sulfur and at least one volatile impurity selected from the group consisting of arsenic, bismuth, lead, selenium, tellurium, tin, and zinc which comprises: melting the metallic copper precipitate in a free-oxygen-containing atmosphere to slag the iron and to form a copper bath containing sulfur, oxygen, and at least one other volatile impurity selected from the group consisting of arsenic, bismuth, lead, selenium, tellurium, tin and zinc, the oxygen content being at least in excess of the sulfur content without forming a separate cuprous oxide phase; removing the slag from the copper bath; then passing a purge gas, which can contain free oxygen, through the copper bath while maintaining the bath at a subatmospheric pressure below about 0.01 atmosphere to rapidly lower the sulfur content of the bath to less than about 0.001%; then terminating the flow of the purge gas and lowering the pressure above the copper
- the purge gas is at least one member selected from the group consisting of nitrogen, argon, air and oxygen.
- the purge gas is at least one member selected from the group consisting of nitrogen, argon, air and oxygen and is passed through the copper bath at a rate between about 1 and 20 standard cubic feet per hour per square foot of bath surface area.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Logic Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19898471A | 1971-11-15 | 1971-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3767383A true US3767383A (en) | 1973-10-23 |
Family
ID=22735728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00198984A Expired - Lifetime US3767383A (en) | 1971-11-15 | 1971-11-15 | Refining copper pyrometallurgically by two-stage subatmospheric treatment |
Country Status (15)
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4010030A (en) * | 1975-09-08 | 1977-03-01 | Kennecott Copper Corporation | Removal of arsenic, antimony and bismuth from molten copper with sulfur hexafluoride |
| US4707185A (en) * | 1985-01-31 | 1987-11-17 | Sumitomo Metal Mining Company Limited | Method of treating the slag from a copper converter |
| EP0416738A1 (en) * | 1989-07-31 | 1991-03-13 | Inco Limited | Nickel-copper matte converters employing nitrogen enriched blast |
| US6403043B1 (en) * | 1998-03-11 | 2002-06-11 | L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Use of gaseous mixture containing an inert gas and an oxygen containing gas in desulphurization of blister copper during anode refining |
| DE4311681C2 (de) * | 1992-04-09 | 2002-07-18 | Mitsubishi Materials Corp | Verfahren zur Herstellung von besonders wenig Sauerstoff aufweisendem Kupfer |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59211541A (ja) * | 1983-05-18 | 1984-11-30 | Nippon Mining Co Ltd | 粗銅の真空精製方法 |
| JPS59226131A (ja) * | 1983-06-06 | 1984-12-19 | Nippon Mining Co Ltd | 粗銅の真空精製装置 |
| SE445361B (sv) * | 1984-12-12 | 1986-06-16 | Boliden Ab | Forfarande for upparbetning av sekundera metalliska smeltmaterial innehallande koppar |
| DE10035593A1 (de) | 2000-07-21 | 2002-01-31 | Norddeutsche Affinerie | Verfahren und Vorrichtung zur Verminderung des Sauerstoffgehaltes einer Kupferschmelze |
| CN102492959B (zh) * | 2011-12-28 | 2014-03-19 | 重庆重冶铜业有限公司 | 一种电解铜阳极的生产方法 |
| BE1027795B1 (nl) * | 2019-11-22 | 2021-06-23 | Metallo Belgium | Verbeterde werkwijze voor het uitsmelten van koper |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US103434A (en) * | 1870-05-24 | Improved process for the treatment of ores | ||
| US1348457A (en) * | 1920-02-05 | 1920-08-03 | Strasser Albert | Process for deoxidizing copper and its alloys |
| GB510861A (en) * | 1938-04-06 | 1939-08-09 | Heraeus Vacuumschmelze Ag | An improved process for the production of copper free from oxygen and other gases |
| GB698758A (en) * | 1951-05-01 | 1953-10-21 | Otto Nielsen | Improvements in and relating to the de-sulphurisation and de-gasification of copper |
| US2732294A (en) * | 1950-09-28 | 1956-01-24 | Manufacture of copper | |
| US3123466A (en) * | 1964-03-03 | crampton | ||
| US3212883A (en) * | 1963-01-02 | 1965-10-19 | Gen Electric | Copper refining process |
| US3258330A (en) * | 1961-09-27 | 1966-06-28 | Nippon Mining Co Ltd | Pyrometallurgical refining process for copper |
| US3282675A (en) * | 1964-05-27 | 1966-11-01 | Inspiration Cons Copper Compan | Up-grading cement copper |
| US3288599A (en) * | 1965-06-02 | 1966-11-29 | Harmon E Keyes | Copper recofery process |
| GB1052907A (enrdf_load_stackoverflow) * | 1964-12-01 | 1966-12-30 | ||
| US3298070A (en) * | 1965-08-13 | 1967-01-17 | Chemetals Corp | Method of producing oxygen-free high conductivity copper |
| GB1071127A (en) * | 1965-05-25 | 1967-06-07 | Ass Elect Ind | Deoxidation of copper and its alloys |
| US3424575A (en) * | 1965-08-10 | 1969-01-28 | Chemetals Corp | Recovery of copper from acid copper sulfate solutions |
| GB1160984A (en) * | 1965-08-10 | 1969-08-13 | Phelps Dodge Corp | A Method of Purifying Copper |
| US3470936A (en) * | 1966-09-12 | 1969-10-07 | Bethlehem Steel Corp | Method for producing high purity copper castings |
| US3490899A (en) * | 1966-10-18 | 1970-01-20 | Continental Copper & Steel Ind | Refined copper and process therefor |
| US3490897A (en) * | 1967-10-27 | 1970-01-20 | Olin Mathieson | Process for producing low oxygen,high conductivity copper |
| US3622304A (en) * | 1970-03-03 | 1971-11-23 | Us Interior | Ferrothermic extraction of copper |
| US3630722A (en) * | 1969-10-13 | 1971-12-28 | Frank D Chew | Copper-refining process |
| US3634065A (en) * | 1968-02-16 | 1972-01-11 | Conzinc Riotinto Ltd | Method for refining metals |
| US3664828A (en) * | 1965-11-22 | 1972-05-23 | Conzinc Riotinto Ltd | Reverberatory smelting of copper concentrates |
| US3669646A (en) * | 1969-11-21 | 1972-06-13 | John T Cullom | Process for autogenous smelting of copper ore concentrates and charge product therefor |
| US3674463A (en) * | 1970-08-04 | 1972-07-04 | Newmont Exploration Ltd | Continuous gas-atomized copper smelting and converting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1576776A (en) * | 1925-08-01 | 1926-03-16 | Nichols Copper Co | Conversion of cuprous materials |
-
0
- BE BE791287D patent/BE791287A/xx unknown
-
1971
- 1971-11-15 US US00198984A patent/US3767383A/en not_active Expired - Lifetime
-
1972
- 1972-10-02 CA CA153,029A patent/CA973720A/en not_active Expired
- 1972-11-09 ZA ZA727948A patent/ZA727948B/xx unknown
- 1972-11-10 ZM ZM177/72*UA patent/ZM17772A1/xx unknown
- 1972-11-10 PH PH14073A patent/PH9937A/en unknown
- 1972-11-14 NO NO4123/72A patent/NO131550C/no unknown
- 1972-11-14 FI FI3184/72A patent/FI60239C/fi active
- 1972-11-14 GB GB5256972A patent/GB1351089A/en not_active Expired
- 1972-11-14 SE SE7214758A patent/SE396770B/xx unknown
- 1972-11-14 FR FR7240335A patent/FR2160439B1/fr not_active Expired
- 1972-11-15 DE DE2255977A patent/DE2255977C3/de not_active Expired
- 1972-11-15 JP JP47114630A patent/JPS524250B2/ja not_active Expired
- 1972-11-15 NL NL7215477A patent/NL7215477A/xx not_active Application Discontinuation
- 1972-11-17 ES ES408574A patent/ES408574A1/es not_active Expired
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3123466A (en) * | 1964-03-03 | crampton | ||
| US103434A (en) * | 1870-05-24 | Improved process for the treatment of ores | ||
| US1348457A (en) * | 1920-02-05 | 1920-08-03 | Strasser Albert | Process for deoxidizing copper and its alloys |
| GB510861A (en) * | 1938-04-06 | 1939-08-09 | Heraeus Vacuumschmelze Ag | An improved process for the production of copper free from oxygen and other gases |
| US2732294A (en) * | 1950-09-28 | 1956-01-24 | Manufacture of copper | |
| GB698758A (en) * | 1951-05-01 | 1953-10-21 | Otto Nielsen | Improvements in and relating to the de-sulphurisation and de-gasification of copper |
| US3258330A (en) * | 1961-09-27 | 1966-06-28 | Nippon Mining Co Ltd | Pyrometallurgical refining process for copper |
| US3212883A (en) * | 1963-01-02 | 1965-10-19 | Gen Electric | Copper refining process |
| US3282675A (en) * | 1964-05-27 | 1966-11-01 | Inspiration Cons Copper Compan | Up-grading cement copper |
| GB1052907A (enrdf_load_stackoverflow) * | 1964-12-01 | 1966-12-30 | ||
| GB1071127A (en) * | 1965-05-25 | 1967-06-07 | Ass Elect Ind | Deoxidation of copper and its alloys |
| US3288599A (en) * | 1965-06-02 | 1966-11-29 | Harmon E Keyes | Copper recofery process |
| US3424575A (en) * | 1965-08-10 | 1969-01-28 | Chemetals Corp | Recovery of copper from acid copper sulfate solutions |
| GB1160984A (en) * | 1965-08-10 | 1969-08-13 | Phelps Dodge Corp | A Method of Purifying Copper |
| US3298070A (en) * | 1965-08-13 | 1967-01-17 | Chemetals Corp | Method of producing oxygen-free high conductivity copper |
| US3664828A (en) * | 1965-11-22 | 1972-05-23 | Conzinc Riotinto Ltd | Reverberatory smelting of copper concentrates |
| US3470936A (en) * | 1966-09-12 | 1969-10-07 | Bethlehem Steel Corp | Method for producing high purity copper castings |
| US3490899A (en) * | 1966-10-18 | 1970-01-20 | Continental Copper & Steel Ind | Refined copper and process therefor |
| US3490897A (en) * | 1967-10-27 | 1970-01-20 | Olin Mathieson | Process for producing low oxygen,high conductivity copper |
| US3634065A (en) * | 1968-02-16 | 1972-01-11 | Conzinc Riotinto Ltd | Method for refining metals |
| US3630722A (en) * | 1969-10-13 | 1971-12-28 | Frank D Chew | Copper-refining process |
| US3669646A (en) * | 1969-11-21 | 1972-06-13 | John T Cullom | Process for autogenous smelting of copper ore concentrates and charge product therefor |
| US3622304A (en) * | 1970-03-03 | 1971-11-23 | Us Interior | Ferrothermic extraction of copper |
| US3674463A (en) * | 1970-08-04 | 1972-07-04 | Newmont Exploration Ltd | Continuous gas-atomized copper smelting and converting |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4010030A (en) * | 1975-09-08 | 1977-03-01 | Kennecott Copper Corporation | Removal of arsenic, antimony and bismuth from molten copper with sulfur hexafluoride |
| FR2322933A1 (fr) * | 1975-09-08 | 1977-04-01 | Kennecott Copper Corp | Procede d'elimination de l'arsenic, de l'antimoine et du bismuth du cuivre fondu a l'aide d'hexafluorure de soufre |
| US4707185A (en) * | 1985-01-31 | 1987-11-17 | Sumitomo Metal Mining Company Limited | Method of treating the slag from a copper converter |
| EP0416738A1 (en) * | 1989-07-31 | 1991-03-13 | Inco Limited | Nickel-copper matte converters employing nitrogen enriched blast |
| DE4311681C2 (de) * | 1992-04-09 | 2002-07-18 | Mitsubishi Materials Corp | Verfahren zur Herstellung von besonders wenig Sauerstoff aufweisendem Kupfer |
| US6403043B1 (en) * | 1998-03-11 | 2002-06-11 | L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Use of gaseous mixture containing an inert gas and an oxygen containing gas in desulphurization of blister copper during anode refining |
Also Published As
| Publication number | Publication date |
|---|---|
| CA973720A (en) | 1975-09-02 |
| ZA727948B (en) | 1973-09-26 |
| DE2255977C3 (de) | 1974-11-28 |
| SE396770B (sv) | 1977-10-03 |
| NO131550C (enrdf_load_stackoverflow) | 1975-06-18 |
| PH9937A (en) | 1976-06-14 |
| ES408574A1 (es) | 1976-03-16 |
| AU4869872A (en) | 1973-09-27 |
| DE2255977B2 (de) | 1974-04-25 |
| BE791287A (fr) | 1973-05-14 |
| NL7215477A (enrdf_load_stackoverflow) | 1973-05-17 |
| JPS524250B2 (enrdf_load_stackoverflow) | 1977-02-02 |
| GB1351089A (en) | 1974-04-24 |
| FR2160439B1 (enrdf_load_stackoverflow) | 1975-01-03 |
| FI60239B (fi) | 1981-08-31 |
| JPS4861322A (enrdf_load_stackoverflow) | 1973-08-28 |
| FR2160439A1 (enrdf_load_stackoverflow) | 1973-06-29 |
| ZM17772A1 (en) | 1973-07-23 |
| DE2255977A1 (de) | 1973-05-30 |
| NO131550B (enrdf_load_stackoverflow) | 1975-03-10 |
| FI60239C (fi) | 1981-12-10 |
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