US3868248A - Deoxidising molten non-ferrous metals - Google Patents
Deoxidising molten non-ferrous metals Download PDFInfo
- Publication number
- US3868248A US3868248A US294071A US29407172A US3868248A US 3868248 A US3868248 A US 3868248A US 294071 A US294071 A US 294071A US 29407172 A US29407172 A US 29407172A US 3868248 A US3868248 A US 3868248A
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- US
- United States
- Prior art keywords
- copper
- oxygen
- molten
- percent
- matte
- 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
Links
- 229910052751 metal Inorganic materials 0.000 title abstract description 23
- 239000002184 metal Substances 0.000 title abstract description 23
- -1 ferrous metals Chemical class 0.000 title abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052802 copper Inorganic materials 0.000 claims abstract description 51
- 239000010949 copper Substances 0.000 claims abstract description 51
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 17
- 239000011777 magnesium Substances 0.000 claims abstract description 17
- 239000000571 coke Substances 0.000 claims abstract description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 8
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 8
- 239000011734 sodium Substances 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 33
- 229910052760 oxygen Inorganic materials 0.000 claims description 33
- 239000001301 oxygen Substances 0.000 claims description 33
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 19
- 239000005864 Sulphur Substances 0.000 claims description 19
- 238000007670 refining Methods 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- 239000011591 potassium Substances 0.000 claims description 6
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 3
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 2
- 150000001340 alkali metals Chemical class 0.000 abstract description 2
- 150000001342 alkaline earth metals Chemical class 0.000 abstract description 2
- 229940108928 copper Drugs 0.000 description 42
- 238000000034 method Methods 0.000 description 11
- 238000007664 blowing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical class [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 240000003936 Plumbago auriculata Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- IXHOXXFTTQTNQS-UHFFFAOYSA-N [Ca].[Na].[K] Chemical compound [Ca].[Na].[K] IXHOXXFTTQTNQS-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 235000014987 copper Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
Definitions
- This invention relates to deoxidising and/or desulphurising molten non-ferrous metals or alloys, particularly molten copper or copper matte.
- blowing is discontinued when the blister copper stage has been reached, at which stage the sulphur content is usually less than 0.01 percent and the oxygen content less than 1 percent. Although not generally practised blowing may be discontinued at any other stage of the converter process.
- Blister copper must be further refined before use ir-' OBJECTS OF THIS INVENTION It is accordingly a principal object of the present invention to provide a method of refining non-ferrous metals to remove sulphur and/or oxygen therefrom with greater efficiency than the aforementioned processes.
- Oxygen is customarily removed by poling immersing the ends of green hardwood trees into the molten metal bath and optionally aided by covering the bath with coke or other carbonaceous material. This method is difficult and inconvenient to carry out and is fundamentally inefficient. It is also prodigal of trees.
- the step of adding to the melt a treatment agent in the form of a body of porous earbonaceous refractory material impregnated with sodium. potassium. calcium or magnesium or an alloy containing at least 20 percent by weight of one or more of these.
- a process for the refining of copper which comprises blowing air or air enriched with oxygen into molten copper or matte until the residual oxygen content of the molten copper reaches a value of not more than 0.3 percent by weight, and adding to the molten copper a treatment agent in the form of a body of porous carbonaceous refractory material impregnated with sodium, potassium, calcium or magnesium or an alloy containing at least 20 percent by weight of one or more of these.
- a process for the production of copper which comprises blowing air or air enriched with oxygen into molten copper or matte until the residual sulphur content of the molten copper has been reduced to not more than 1 percent and adding to the molten cop per a treatment agent in the form of a body of porous carbonaceous refractory material impregnated with sodium potassium calcium or magnesium. or an alloy containing at least 20 percent of one or more of these.
- the preferred porous carbonaceous refractory material is coke and the preferred impregnants are sodium and magnesium.
- Treatment agents as just defined are preferably used bu immersing them in the molten metal under treatment, for example, by plunging. Because of the heat in the molten metal, the impregnant metal vaporises and the vapour effects a deoxidising and desulphurising action on the molten metal.
- the efficiency of sulphur and/or oxygen removal using treatment agents according to the invention will depend on such factors as molten metal temperature. configuration of the treatment vessel and treatment time may vary from 40 percent to percent.
- metal-impregnated treatment agents as defined above, it may even be possible to dispense with one or more separate refining operations at present considered necessary in copper or other non-ferrous metal production, For instance in the copper refining sequence noted above, the purity of copper from the converter may be so raised that anodes for electrolytic refining may be cast directly from the converter without further need for fire refining.
- the oxygen content of the molten copper can easily be reduced to below 0.05 percent by weight.
- the process of the invention has been described with reference to the smelting or refining of a copper containing melt, it may also be used in the processing of mattes and matte-like materials containing one or more of the following metals nickel, cobalt, zinc, lead, gold, silver and platinum, or in the treatment of metals such as nickel and nickel alloys.
- EXAMPLE I containing 44 percent magnesium were then plunged into the molten copper using a plumbago plunger until reaction was complete. After reaction had taken place the melt was allowed to stand for 5 minutes in order that solid desulphurisation products could rise tothe surface of the molten copper. Further suction samples of molten copper were then taken from the lower part of the crucible.
- Oxygen content before treatment Oxygen content after treatment EXAMPLE lll Molten copper from a converter was transferred into a 25 tonne treatment ladle, and was treated at a temperature of l,23()C with 350kg magnesium impregnated coke containing 44 percent magnesium. The treatment time was 20 minutes.
- the improvement which comprises continuing to blow air optionally enriched with oxygen into the molten copper or matte until the residual oxygen content of the molten copper reaches a value of not more than 0.3 percent by weight, and thereafter adding to the molten copper a treatment agent in the form of a body of porous coke impregnated with sodium, potassium, calcium, magnesium or an alloy containing at least 20 percent of one or more of these.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Molten non-ferrous metals, particularly copper, are refined by treatment with a porous carbonaceous refractory such as coke impregnated with an alkali metal, alkaline earth metal or magnesium. Sodium and magnesium are the preferred impregnants.
Description
zl= United States atent 11 1 1111 3,868,248
Neu Feb. 25, 1975 [54] DEOXlDISING MOLTEN NON-FERROUS 2,003,889 6/1935 .lennison et al. 75/76 METALS 2,03l,5l8 2/l936 Forster et al. 75/76 2,265,150 l2/l94l Critchett et al 75/58 Inventor: Max Gerhard l' s, 2,540,173 2/1951 OiiVO 75/58 England 2,988,445 6/1961 Hurum v. 75/l30 A 3,326,671 6 1967 W t .i 75 73 [73] Asslgnee: 9 Imemamna' L'mltedt 3,492,114 1i1970 56221 1361 7515s Blrmmgham, gland 3,656,989 4/1972 Layland 117/16 [22] Filed: Oct. 2, 1972 21 A L N I 294 071 Primary ExaminerWalter R. Satterfield 1 pp 0 Attorney, Agent, or Firm-Cushman, Darby &
Cushman [30] Foreign Application Priority Data Oct. 6, 1971 Great Britain 46500/71 [57] ABSTRACT [52] US. Cl. 75/276, 75/93 Molten nomferrous metals, particularly copper are Illt. C refined treatment with a porous carbonaceous [58] Fleld of Search 75/76 9 fractory such as coke impregnated with an alkali 75/73 117/16 meta], alkaline earth metal or magnesium. Sodium and References Cited magnesium are the preferred impregnants.
UNITED STATES PATENTS 2 Claims, N0 Drawings l,869 498 8/l932 Osborg 7 5/76 DEOXIDISING MOLTEN NON-FERROUS METALS FIELD OF THE INVENTION This invention relates to deoxidising and/or desulphurising molten non-ferrous metals or alloys, particularly molten copper or copper matte.
PRIOR ART In the manufacture of pure copper from its ores a large number of extractive refining steps are carried out. Some of these stages are expensive and time consuming, and efforts are constantly being directed to making them faster and more efficient.
Thus. in the manufacture of copper, concentrated ore and fluxes are heated together in areverberatory furnace to convert the ore, usually in the form of sulphides. to copper matte, which is a fusion of copper and iron sulphides. In order to remove from the matte undesired iron and sulphur. the molten matte is introduced into a converter. In the converter air or air enriched with oxygen is blown through the molten matte and the oxygen combines with the iron, and with silica contained in an added flux to produce iron silicate in the form of a removable slag. At this stage the sulphur content of the matte is of the order of percent and the oxygen content is negligible. Further blowing of air or air enriched with oxygen removes the sulphur from the matte in the form of gaseous sulphur oxides. The usual product ofthe converter, which is known as blister copper on account of the appearance of its upper surface if cast, contains oxygen. sulphur and frequently a wide variety of other impurities.
During the course of blowing air through the molten matte contained in the converter the sulphur level of the matte is gradually reduced by oxidation, and the level of retained oxygen is gradually increased. Nor-' mally blowing is discontinued when the blister copper stage has been reached, at which stage the sulphur content is usually less than 0.01 percent and the oxygen content less than 1 percent. Although not generally practised blowing may be discontinued at any other stage of the converter process.
Blister copper must be further refined before use ir-' OBJECTS OF THIS INVENTION It is accordingly a principal object of the present invention to provide a method of refining non-ferrous metals to remove sulphur and/or oxygen therefrom with greater efficiency than the aforementioned processes.
content. Oxygen is customarily removed by poling immersing the ends of green hardwood trees into the molten metal bath and optionally aided by covering the bath with coke or other carbonaceous material. This method is difficult and inconvenient to carry out and is fundamentally inefficient. It is also prodigal of trees.
All these copper smelting and refining operations are expensive in terms of air, power and refractory usage and are time-consuming. They suffer from the disadvantage that the further smelting or refining proceeds, the slower the process becomes. i.e., the efficiency of, for example, sulphur or oxygen removal drops away rapidly. In order to work an economic compromise, therefore. the converter operation is often curtailed with undesirably high oxygen, sulphur or other impurity contents in the molten metal. This leads to longer subsequent treatment times in the next refining. or smelting stage It is a further specific object of the invention to provide a process for desulphurising copper efficiently and without the drawbacks noted above.
GENERAL DESCRIPTION OF THE INVENTION I have now found that in copper production and in analogous processes in other non-ferrous metal smelting and refining operations, the metal production processes may be more economic and rapid by the use of additives comprising alkali metals, alkali earth metals or magnesium.
According, therefore, to the present invention there is provided, in a process of smelting or refining a nonferrous metal or alloy melt, particularly a coppercontaining melt, the step of adding to the melt a treatment agent in the form of a body of porous earbonaceous refractory material impregnated with sodium. potassium. calcium or magnesium or an alloy containing at least 20 percent by weight of one or more of these.
According to a further feature of the invention there is provided a process for the refining of copper which comprises blowing air or air enriched with oxygen into molten copper or matte until the residual oxygen content of the molten copper reaches a value of not more than 0.3 percent by weight, and adding to the molten copper a treatment agent in the form of a body of porous carbonaceous refractory material impregnated with sodium, potassium, calcium or magnesium or an alloy containing at least 20 percent by weight of one or more of these.
According to a further feature of the invention there is provided a process for the production of copper which comprises blowing air or air enriched with oxygen into molten copper or matte until the residual sulphur content of the molten copper has been reduced to not more than 1 percent and adding to the molten cop per a treatment agent in the form of a body of porous carbonaceous refractory material impregnated with sodium potassium calcium or magnesium. or an alloy containing at least 20 percent of one or more of these.
The preferred porous carbonaceous refractory material is coke and the preferred impregnants are sodium and magnesium.
Treatment agents as just defined are preferably used bu immersing them in the molten metal under treatment, for example, by plunging. Because of the heat in the molten metal, the impregnant metal vaporises and the vapour effects a deoxidising and desulphurising action on the molten metal.
The efficiency of sulphur and/or oxygen removal using treatment agents according to the invention will depend on such factors as molten metal temperature. configuration of the treatment vessel and treatment time may vary from 40 percent to percent.
The use oftreatment agent as just defined is of particular value in copper production as noted above. In particular magnesium-impregnated coke may be immersed in the molten metal towards the end of a converter cycle in order rapidly to reduce the remaining sulphur content and to remove excess oxygen, introduced during the conversion. Plunging magnesium impregnated coke may also reduce or replace poling to deoxidise copper in a refining furnace or other vessel. By the careful use of metal-impregnated treatment agents as defined above, it may even be possible to dispense with one or more separate refining operations at present considered necessary in copper or other non-ferrous metal production, For instance in the copper refining sequence noted above, the purity of copper from the converter may be so raised that anodes for electrolytic refining may be cast directly from the converter without further need for fire refining. By use of a sufficient quantity of treatment agent, the oxygen content of the molten copper can easily be reduced to below 0.05 percent by weight.
Although the process of the invention has been described with reference to the smelting or refining of a copper containing melt, it may also be used in the processing of mattes and matte-like materials containing one or more of the following metals nickel, cobalt, zinc, lead, gold, silver and platinum, or in the treatment of metals such as nickel and nickel alloys.
SPECIFIC EXAMPLES In these examples, all percentages are by weight.
EXAMPLE I containing 44 percent magnesium were then plunged into the molten copper using a plumbago plunger until reaction was complete. After reaction had taken place the melt was allowed to stand for 5 minutes in order that solid desulphurisation products could rise tothe surface of the molten copper. Further suction samples of molten copper were then taken from the lower part of the crucible.
All the metal samples were analysed, and the followl ing results were obtained:
Sulphur content before treatment Sulphur content after treatment EXAMPLE ll kg of cathode copper were melted, under a reducing flux cover, in a crucible in an oil-fired lift out furnace. After melting and at a temperature of 1,200C the flux cover was removed, and oxygen was added to the molten copper by blowing air into the melt. Suction ten copper were then taken from the lower part of the crucible.
All the metal samples were analysed, and the following results were obtained:
Oxygen content before treatment Oxygen content after treatment EXAMPLE lll Molten copper from a converter was transferred into a 25 tonne treatment ladle, and was treated at a temperature of l,23()C with 350kg magnesium impregnated coke containing 44 percent magnesium. The treatment time was 20 minutes.
The copper was analysed for sulphur and oxygen before and after treatment and the following results were obtained:
Oxygen content before treatment 0.319 Oxygen content after treatment 0.02% Sulphur content before treatment 0.06% Sulphur content after treatment less than 001% I claim as my invention 1. In the refining of copper wherein air optionally enriched with oxygen is blown into molten copper or matte, the improvement which comprises continuing to blow air optionally enriched with oxygen into the molten copper or matte until the residual oxygen content of the molten copper reaches a value of not more than 0.3 percent by weight, and thereafter adding to the molten copper a treatment agent in the form of a body of porous coke impregnated with sodium, potassium, calcium, magnesium or an alloy containing at least 20 percent of one or more of these.
2. In the refining of copper wherein air optionally enriched with oxygen is blown into molten copper or matte, the improvement which comprises continuing to blow air optionally enriched with oxygen into the molten copper or matte until the sulphur content of the copper is 1 percent by weight or less, and thereafter adding to the molten copper a treatment agent in the form of a body of porous coke impregnated with sov dium, potassium, calcium, magnesium or an alloy containing at least 20 percent of one or more of these.
Claims (2)
1. IN THE REFINING OF COPPER WHEREIN AIR OPTIONALLY ENRICHED WITH OXYGEN IS BLOWN INTO MOLTEN COPPER OR MATTE, THE IMPROVEMENT WHICH COMPRISES CONTINUING TO BLOW AIR OPTIONALLY ENRICHED WITH OXYGEN INTO THE MOLTEN COPPER OR MATTE UNTIL THE RESIDUAL OXYGEN CONTENT OF THE MOLTEN COPPER REACHES A VALUE OF NOT MORE THAN 0.3 PERCENT BY WEIGHT, AND THEREAFTER ADDING TO THE MOLTEN COPPER A TREATMENT AGENT IN THE FORM OF A BODY OF POROUS COKE IMPREGNATED WITH SODIUM, POTASSIUM, CALCIUM, MAGNESIUM OR AN ALLOY CONTAINING AT LEAST 20 PERCENT OF ONE OR MORE OF THESE.
2. In the refining of copper wherein air optionally enriched with oxygen is blown into molten copper or matte, the improvement which comprises continuing to blow air optionally enriched with oxygen into the molten copper or matte until the sulphur content of the copper is 1 percent by weight or less, and thereafter adding to the molten copper a treatment agent in the form of a body of porous coke impregnated with sodium, potassium, calcium, magnesium or an alloy containing at least 20 percent of one or more of these.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4650071A GB1369494A (en) | 1971-10-06 | 1971-10-06 | Deoxidisation and desulphurisation of non-ferrous metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3868248A true US3868248A (en) | 1975-02-25 |
Family
ID=10441510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US294071A Expired - Lifetime US3868248A (en) | 1971-10-06 | 1972-10-02 | Deoxidising molten non-ferrous metals |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3868248A (en) |
| JP (1) | JPS4845422A (en) |
| CA (1) | CA997936A (en) |
| FR (1) | FR2155601A5 (en) |
| GB (1) | GB1369494A (en) |
| ZM (1) | ZM16272A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050178668A1 (en) * | 2003-11-21 | 2005-08-18 | Andreas Mobius | Method for depositing nickel- and chromium (VI) -free metal matte layers |
| WO2006029162A1 (en) * | 2004-09-07 | 2006-03-16 | Universidad De Chile | Method of continuous fire refining of copper |
| WO2006029246A1 (en) * | 2004-09-07 | 2006-03-16 | Universidad De Chile | Installation for continuous fire refining of copper |
| WO2009077851A1 (en) * | 2007-12-19 | 2009-06-25 | Universidad De Chile | Continuous fire reduction of liquid copper |
| CN102140584A (en) * | 2011-03-22 | 2011-08-03 | 富威科技（吴江）有限公司 | Method for deoxidizing copper solution |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1869498A (en) * | 1931-06-26 | 1932-08-02 | Osborg Hans | Process of treating molten copper and copper alloys with compositions containing "lithium-alkali" alloys and products resulting from such treatments |
| US2003889A (en) * | 1933-10-20 | 1935-06-04 | American Brass Co | Method of making deoxidized copper and copper alloys |
| US2031518A (en) * | 1934-06-27 | 1936-02-18 | American Lurgi Corp | Method of producing copper having high electrical conductivity and being free from oxygen |
| US2265150A (en) * | 1940-10-23 | 1941-12-09 | Electro Metallurg Co | Addition agent and its use in treating molten iron and steel |
| US2540173A (en) * | 1948-01-30 | 1951-02-06 | Olivo Mario | Cupola briquette |
| US2988445A (en) * | 1952-05-29 | 1961-06-13 | Hurum Fredrik Jorgen Ording | Method for making briquettes for the treatment of molten metals and alloys |
| US3326671A (en) * | 1963-02-21 | 1967-06-20 | Howard K Worner | Direct smelting of metallic ores |
| US3492114A (en) * | 1966-10-19 | 1970-01-27 | Sulzer Ag | Method for alloying highly reactive alloying constituents |
| US3656989A (en) * | 1969-03-19 | 1972-04-18 | Foseco Int | Production of metal-impregnated porous coke materials |
-
1971
- 1971-10-06 GB GB4650071A patent/GB1369494A/en not_active Expired
-
1972
- 1972-10-02 US US294071A patent/US3868248A/en not_active Expired - Lifetime
- 1972-10-05 CA CA153,331A patent/CA997936A/en not_active Expired
- 1972-10-05 FR FR7235342A patent/FR2155601A5/fr not_active Expired
- 1972-10-05 JP JP47100259A patent/JPS4845422A/ja active Pending
- 1972-10-06 ZM ZM162/72*UA patent/ZM16272A1/en unknown
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1869498A (en) * | 1931-06-26 | 1932-08-02 | Osborg Hans | Process of treating molten copper and copper alloys with compositions containing "lithium-alkali" alloys and products resulting from such treatments |
| US2003889A (en) * | 1933-10-20 | 1935-06-04 | American Brass Co | Method of making deoxidized copper and copper alloys |
| US2031518A (en) * | 1934-06-27 | 1936-02-18 | American Lurgi Corp | Method of producing copper having high electrical conductivity and being free from oxygen |
| US2265150A (en) * | 1940-10-23 | 1941-12-09 | Electro Metallurg Co | Addition agent and its use in treating molten iron and steel |
| US2540173A (en) * | 1948-01-30 | 1951-02-06 | Olivo Mario | Cupola briquette |
| US2988445A (en) * | 1952-05-29 | 1961-06-13 | Hurum Fredrik Jorgen Ording | Method for making briquettes for the treatment of molten metals and alloys |
| US3326671A (en) * | 1963-02-21 | 1967-06-20 | Howard K Worner | Direct smelting of metallic ores |
| US3492114A (en) * | 1966-10-19 | 1970-01-27 | Sulzer Ag | Method for alloying highly reactive alloying constituents |
| US3656989A (en) * | 1969-03-19 | 1972-04-18 | Foseco Int | Production of metal-impregnated porous coke materials |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050178668A1 (en) * | 2003-11-21 | 2005-08-18 | Andreas Mobius | Method for depositing nickel- and chromium (VI) -free metal matte layers |
| WO2006029162A1 (en) * | 2004-09-07 | 2006-03-16 | Universidad De Chile | Method of continuous fire refining of copper |
| WO2006029246A1 (en) * | 2004-09-07 | 2006-03-16 | Universidad De Chile | Installation for continuous fire refining of copper |
| AU2005282475B2 (en) * | 2004-09-07 | 2011-03-31 | Empressa Nacional De Mineria Enami | Method of continuous fire refining of copper |
| WO2009077851A1 (en) * | 2007-12-19 | 2009-06-25 | Universidad De Chile | Continuous fire reduction of liquid copper |
| US8801830B2 (en) | 2007-12-19 | 2014-08-12 | Universidad De Chile | Continuous fire reduction of liquid copper |
| CN102140584A (en) * | 2011-03-22 | 2011-08-03 | 富威科技（吴江）有限公司 | Method for deoxidizing copper solution |
| CN102140584B (en) * | 2011-03-22 | 2012-12-26 | 富威科技（吴江）有限公司 | Method for deoxidizing copper solution |
Also Published As
| Publication number | Publication date |
|---|---|
| CA997936A (en) | 1976-10-05 |
| GB1369494A (en) | 1974-10-09 |
| ZM16272A1 (en) | 1973-06-21 |
| JPS4845422A (en) | 1973-06-29 |
| FR2155601A5 (en) | 1973-05-18 |
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