US20140116202A1 - Method for improving the reduction degree in the smelting of ferroalloy - Google Patents
Method for improving the reduction degree in the smelting of ferroalloy Download PDFInfo
- Publication number
- US20140116202A1 US20140116202A1 US14/125,657 US201214125657A US2014116202A1 US 20140116202 A1 US20140116202 A1 US 20140116202A1 US 201214125657 A US201214125657 A US 201214125657A US 2014116202 A1 US2014116202 A1 US 2014116202A1
- Authority
- US
- United States
- Prior art keywords
- nickel
- fed
- smelting furnace
- raw material
- partly
- 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.)
- Abandoned
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910001021 Ferroalloy Inorganic materials 0.000 title claims abstract description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 245
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 120
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 239000012141 concentrate Substances 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 9
- 239000010935 stainless steel Substances 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 239000008188 pellet Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 23
- 239000011651 chromium Substances 0.000 claims description 19
- 239000013067 intermediate product Substances 0.000 claims description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 14
- 229910052804 chromium Inorganic materials 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 239000000047 product Substances 0.000 claims description 10
- 238000002386 leaching Methods 0.000 claims description 9
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000000638 solvent extraction Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 11
- 239000000306 component Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000012925 reference material Substances 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- 229910000604 Ferrochrome Inorganic materials 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 238000001354 calcination Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/005—Manufacture of stainless steel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-alloys
-
- 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
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- This invention relates to a method for improving the reduction degree of metal components in a material to be treated when smelting ferroalloy, as ferrochrome suitable for manufacturing of stainless steel. According to the method nickel-bearing material is fed into ferroalloy.
- Heat treated objects can be downsized, when desired, when conveying object between separate process stages or process units.
- Sintered and thus strengthened pellets are used as material in a smelting process carried out in reducing conditions, in which case it is received as a smelting product nickel-containing ferroalloy, ferrochromenickel.
- WO patent publication 2010/092234 thus relates mainly to the production of nickel-containing pellets by sintering. Instead, smelting conditions of the sintered pellets are not exactly described.
- nickel containing in pellets catalyses chromium reduction in pellets and thus decreases the specific consumption, advantageous carbon, of the reducing agent in the ferroalloy production.
- nickel containing in pellets not only catalyses the reduction of chromium in chromite pellets, but nickel containing in the feed of a furnace used for smelting of chromite improves in the smelting process the reduction of all essential metal components, iron, chromium and nickel, containing in the feed of the smelting furnace.
- the object of the present invention is to utilize this surprising finding and to achieve a more effective method than before for increasing the reduction degree in the smelting process of chromite material in which method the reduction of metal components in chromite during the smelting is improved by alloying into the material to be gone into smelting nickel-containing material and simultaneously to achieve a prealloy, ferrochromenickel, suitable to the production of stainless steel.
- the essential features are enlisted in the appended claims.
- the invention is alloyed into the raw material, as chromite, to be smelted in the ferroalloy production before the smelting nickel-containing material, in which case nickel-containing improves the reduction of metal components containing in the feed material simultaneously when nickel-containing material itself is managed to be reduced as a metallic component in the ferroalloy.
- nickel-containing improves the reduction of metal components containing in the feed material simultaneously when nickel-containing material itself is managed to be reduced as a metallic component in the ferroalloy.
- the nickel amount to be added into the ferroalloy it can advantageously be adjusted the reduction degree of metal components in the ferroalloy and simultaneously be achieved a ferroalloy containing the desired nickel content, as ferrochromenickel alloys having different nickel contents.
- Ferrochromenickel alloys containing desired nickel contents can be used for instance for the production of different stainless steels, as austenitic or duplex stainless steels.
- the method according to the invention can be used as a nickel-containing raw material at least partly nickel oxide, at least partly nickel ore and/or nickel concentrate or at least partly a nickel-containing intermediate product achieved by the leaching and/or by precipitating of nickel ores and/or nickel concentrates.
- the nickel-containing raw material is fed into a smelting process together with ferrochrome raw material. Before feeding into a smelting furnace the nickel-containing raw material is pretreated either so that sintered pellets are formed from the nickel-containing material together with the ferrochrome raw material or so that the nickel-containing raw material is pretreated separately to chromite pellets.
- the pretreatment of the nickel-containing raw material also so that one part of the nickel-containing raw material to be fed into the smelting furnace is pretreated together with chromite pellets and one part of the nickel-containing raw material is pretreated separately to chromite pellets. Thanks to different pretreatments the nickel-containing raw material to be fed into the smelting furnace and promoting the reduction of different metal components can be for instance partly nickel-containing hydroxide intermediate product, partly sulphidic or lateritic nickel concentrate.
- the nickel-containing raw material to be utilized in the method according to the invention is advantageously a nickel-containing hydroxide intermediate product from mines or other hydrometallurgical processes, which intermediate product is precipitated from solutions of lateritic and/or sulphidic nickel ores and/or nickel-containing concentrates of sulphidic ores.
- This kind of nickel-containing hydroxide intermediate product is for instance a nickel-containing intermediate product from pressure leaching, atmosphere leaching or heap leaching of lateritic or sulphidic nickel ores or nickel concentrates as well as a nickel-containing precipitated product of solvent extraction solutions, stripping solutions or refining solutions received from solvent extraction processes or ion exchange processes of nickel-containing materials.
- a raw material in the method of the invention it can as a raw material be used also carbonate or sulphate nickel materials. Further, a sulphidic nickel concentrate itself and a hydrometallurgically precipitated nickel sulphide intermediate product are suited for the nickel-containing raw material of the method.
- the amount of the nickel-containing material to be fed into a smelting furnace is adjusted in the range of 5-25 weight %, preferably 10-20 weight %, from the total mass of the pretreated material to be fed into the smelting furnace.
- the amount of the nickel-containing to be fed into the smelting furnace it is considered the achievement of the energy-economically favourable reduction conditions and/or the production of a prealloy, ferrochromenickel, suitable the production of favourable stainless steel in each case.
- the reduction degree remains low, in which case it is created a ferroalloy with low nickel content, ferrochromenickel.
- This kind of ferroalloy with a low nickel content is a favourable prealloy especially to the production of duplex stainless steel grades. Using a greater addition of nickel-containing raw material the reduction degree increases and also the nickel content in the smelting product is greater. This kind of ferrochromenickel with a greater nickel content is favourable to use to the production of austenitic stainless steel grades having a high nickel content.
- the pretreatment of nickel-containing raw material to be fed into a smelting furnace in accordance with the method of the invention it is advantageously considered the composition and the microstructure of the nickel raw material.
- the nickel-containing raw material is for instance a nickel-containing intermediate product of mines or other hydrometallurgical processes precipitated from solutions of nickel-containing solutions, which intermediate product requires to carry out as a pretreatment among others calcination at a higher temperature
- the pretreatment of the nickel-containing raw material is carried out together with the production of chromite pellets and sintering of pellets.
- the nickel-containing raw material of the method according to the invention is material, as for instance nickel oxide, nickel ore and/or nickel concentrate, which does not require in addition to a possible drying any other essential pretreatment at a higher temperature
- the nickel-containing raw material is possible to feed into a smelting furnace with the feeding of chromite pellets.
- the microstructure and composition of the nickel-containing raw material can also be such that it is advantageous to pretreat the raw material separately from chromite pelletizing and to feed the nickel-containing raw material into sintering of chromite pellets before feeding into a smelting furnace.
- the method according to the invention is used advantageously a smelting furnace which is provided with a preheating equipment so that the feed going into the smelting furnace is conducted through the preheating equipment into the smelting furnace.
- the pretreated nickel-containing raw material is conducted also into the preheating equipment wherein the nickel-containing will come at the latest into contact with other material to be fed into the smelting furnace.
- the nickel-containing together with chromite pellets are smelted to ferrochromenickel having a desired composition, which ferrochromenickel can be utilized in accordance with its composition advantageously for instance in the production of austenitic or duplex stainless steels.
- carbon monoxide gases generated in the reduction and smelting can be utilized in one hand for instance in the sintering of chromite pellets and in possible other pretreatment and preheating, in another hand for instance in different steps of the production path of stainless steel produced from the smelting product, ferrochromenickel.
- chromite concentrate containing iron and chromium and an intermediate product containing nickel it was formed a mixture, into which mixture it was added as a binder 1,2 weight % bentonite and 3 weight % slag forming material, flux, either limestone or wollastonite.
- table 1 it is presented the contents of chromium, iron, nickel, carbon and sulphur as weight % in mixtures, into which was added 10 weight % (Test 1) and 20 weight % (Test 2) nickel hydroxide. Further, in the table 1 it has as a reference material (REF) a mixture, into which mixture nickel hydroxide was not added.
- REF reference material
- the mixtures containing a binder and representing each material of the table 1 were pelletized and sintered. A part of sintered pellets was fed representatively into a smelting furnace with a slag former and a reducing agent.
- the materials according to the table 1 were smelted, and in the table 2 it is presented the contents of chromium, iron, nickel, carbon and silicon in smelting products in question and further the recovery of the metal components, chromium, iron and nickel, into the smelting product.
- the carbon content is composed in accordance with the composition and the equilibrium of the metal alloy.
- the feed batch has carbon so much that carbon is some enough also for the reduction of silicon into the smelting product.
- the feed alloy has silicon oxide in raw material and in production bulk supplies.
- thermogravimetric measurements for one part of sintered pellets it was made in the laboratory scale thermogravimetric measurements in order to monitor the reduction degree of the metal components, chromium, iron and nickel, of pellets in the conditions representing the smelting process at different temperature zones with the maximum temperature of 1550° C.
- Table 3 it is presented the results of the thermogravimetric measurements for the reduction degree of chromium (Cr met /Cr tot ), iron (Fe met /Fe tot ) and nickel (Ni met /Ni tot ) at the temperatures of 1400° C. and 1550° C.
- the addition of the nickel-containing raw material into pellets increases the reduction degree of chromium and iron at the temperature of 1550° C. substantially, chromium more than 15% and iron more than 70% simultaneously when the reduction degree of nickel increases near to 100% with the Test 2 nickel content.
- the increase of the reduction degree for all metal components, chromium, iron and nickel in sintered pellets by means of the addition of a nickel-containing raw material simultaneously decreases the need of coke used as reducing agent in the achievement of the reduction conditions of the smelting process.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20110200 | 2011-06-13 | ||
FI20110200A FI123241B (fi) | 2011-06-13 | 2011-06-13 | Menetelmä pelkistymisasteen parantamiseksi ferroseosta sulatettaessa |
PCT/FI2012/050580 WO2012172168A1 (en) | 2011-06-13 | 2012-06-08 | Method for improving the reduction degree in the smelting of ferroalloy |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140116202A1 true US20140116202A1 (en) | 2014-05-01 |
Family
ID=44206736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/125,657 Abandoned US20140116202A1 (en) | 2011-06-13 | 2012-06-08 | Method for improving the reduction degree in the smelting of ferroalloy |
Country Status (20)
Country | Link |
---|---|
US (1) | US20140116202A1 (es) |
EP (1) | EP2718476A4 (es) |
JP (1) | JP6148230B2 (es) |
KR (2) | KR20160087397A (es) |
CN (1) | CN103732774A (es) |
AP (1) | AP3866A (es) |
AT (1) | AT513441B1 (es) |
AU (1) | AU2012270290B2 (es) |
BR (1) | BR112013031991A8 (es) |
CA (1) | CA2843210A1 (es) |
DE (1) | DE112012002439T5 (es) |
FI (1) | FI123241B (es) |
MX (1) | MX2013014524A (es) |
NO (1) | NO347489B1 (es) |
RU (1) | RU2600788C2 (es) |
SE (1) | SE538994C2 (es) |
TW (1) | TWI612147B (es) |
UA (1) | UA115863C2 (es) |
WO (1) | WO2012172168A1 (es) |
ZA (1) | ZA201309401B (es) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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ES2950362T3 (es) | 2010-12-03 | 2023-10-09 | Interdigital Patent Holdings Inc | Método y aparato para realizar agregación de portadora de tecnología de acceso multi-radio |
WO2013019501A1 (en) | 2011-07-29 | 2013-02-07 | Interdigital Patent Holdings, Inc. | Method and apparatus for radio resources management in multi-radio access technology wireless systems |
FI126718B (fi) * | 2013-12-17 | 2017-04-28 | Outotec Finland Oy | Menetelmä ferronikkeliprosessista tulevien pölyjen hyödyntämiseksi ja menetelmällä valmistetut sintratut pelletit |
CN105506271B (zh) * | 2014-09-24 | 2018-05-08 | 宝钢不锈钢有限公司 | 一种氩氧精炼炉还原用铬矿复合球团及其生产方法和应用 |
BR112019000149B1 (pt) * | 2016-07-11 | 2023-02-23 | Outotec (Finland) Oy | Processo para fabricar aglomerados contendo cromo e ferro com diferente adição de materiais contendo manganês, níquel e molibdênio |
CN109477155A (zh) * | 2016-07-11 | 2019-03-15 | 奥图泰(芬兰)公司 | 制造具有所需的含量的锰、镍、钼的铁铬合金的方法 |
FI128814B (fi) * | 2016-12-30 | 2020-12-31 | Outotec Finland Oy | Menetelmä nikkeliä sisältävien kovetettujen kromiittipellettien tuottamiseksi, menetelmä ferrokrominikkeliseoksen tuottamiseksi ja kovetettu kromiittipelletti |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3525604A (en) * | 1966-10-21 | 1970-08-25 | Edward M Van Dornick | Process for refining pelletized metalliferous materials |
US3847601A (en) * | 1972-05-29 | 1974-11-12 | Nippon Yakin Kogyo Co Ltd | Reduced pellets for making alloys containing nickel and chromium |
WO2006050658A1 (fr) * | 2005-09-16 | 2006-05-18 | Shenjie Liu | Procede de preparation de ferronickel par fusion en haut fourneau de minerai d’oxyde de nickel depourvu d’eau cristalline |
Family Cites Families (8)
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GB759085A (en) * | 1953-06-05 | 1956-10-10 | Chromium Mining & Smelting Cor | Improvements in or relating to ferroalloying materials and process of preparing the same |
ZW9893A1 (en) * | 1992-08-11 | 1993-09-15 | Mintek | The production of stainless steel |
WO1997020954A1 (en) * | 1995-12-06 | 1997-06-12 | Wmc Resources Ltd. | Simplified duplex processing of nickel ores and/or concentrates for the production of ferronickels, nickel irons and stainless steels |
US5749939A (en) * | 1996-12-04 | 1998-05-12 | Armco Inc. | Melting of NI laterite in making NI alloyed iron or steel |
RU2190034C2 (ru) * | 2000-06-26 | 2002-09-27 | Региональное Уральское отделение Академии инженерных наук Российской Федерации | Способ выплавки сплавов из оксидосодержащих материалов |
CN1847440A (zh) * | 2006-04-25 | 2006-10-18 | 吴江市东大铸造有限公司 | 镍铬铁合金及生产方法 |
FI127721B (fi) * | 2009-02-11 | 2019-01-15 | Outokumpu Oy | Menetelmä nikkeliä sisältävän ferroseoksen valmistamiseksi |
RU2406767C1 (ru) * | 2009-04-08 | 2010-12-20 | Александр Валерьевич Кольба | Способ металлотермической плавки металлов и сплавов |
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2012
- 2012-06-08 RU RU2013154744/02A patent/RU2600788C2/ru active
- 2012-06-08 CN CN201280029431.XA patent/CN103732774A/zh active Pending
- 2012-06-08 US US14/125,657 patent/US20140116202A1/en not_active Abandoned
- 2012-06-08 WO PCT/FI2012/050580 patent/WO2012172168A1/en active Application Filing
- 2012-06-08 JP JP2014515237A patent/JP6148230B2/ja active Active
- 2012-06-08 BR BR112013031991A patent/BR112013031991A8/pt not_active Application Discontinuation
- 2012-06-08 EP EP12799733.6A patent/EP2718476A4/en not_active Withdrawn
- 2012-06-08 UA UAA201400170A patent/UA115863C2/uk unknown
- 2012-06-08 DE DE112012002439.7T patent/DE112012002439T5/de active Pending
- 2012-06-08 CA CA2843210A patent/CA2843210A1/en not_active Abandoned
- 2012-06-08 KR KR1020167018517A patent/KR20160087397A/ko active Search and Examination
- 2012-06-08 AU AU2012270290A patent/AU2012270290B2/en active Active
- 2012-06-08 SE SE1351487A patent/SE538994C2/sv unknown
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- 2012-06-08 KR KR1020137033113A patent/KR20140012754A/ko active Application Filing
- 2012-06-08 AP AP2013007314A patent/AP3866A/en active
- 2012-06-08 AT ATA9268/2012A patent/AT513441B1/de active
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- 2012-06-13 TW TW101121078A patent/TWI612147B/zh active
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Patent Citations (4)
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US3525604A (en) * | 1966-10-21 | 1970-08-25 | Edward M Van Dornick | Process for refining pelletized metalliferous materials |
US3847601A (en) * | 1972-05-29 | 1974-11-12 | Nippon Yakin Kogyo Co Ltd | Reduced pellets for making alloys containing nickel and chromium |
WO2006050658A1 (fr) * | 2005-09-16 | 2006-05-18 | Shenjie Liu | Procede de preparation de ferronickel par fusion en haut fourneau de minerai d’oxyde de nickel depourvu d’eau cristalline |
AU2005304190B2 (en) * | 2005-09-16 | 2009-09-17 | Shenjie Liu | A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace |
Also Published As
Publication number | Publication date |
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SE1351487A1 (sv) | 2014-03-04 |
EP2718476A4 (en) | 2014-11-05 |
NO20140016A1 (no) | 2014-01-08 |
SE538994C2 (sv) | 2017-03-14 |
FI20110200A0 (fi) | 2011-06-13 |
RU2600788C2 (ru) | 2016-10-27 |
DE112012002439T5 (de) | 2014-04-03 |
AT513441A2 (de) | 2014-04-15 |
FI20110200L (fi) | 2012-12-14 |
JP6148230B2 (ja) | 2017-06-14 |
JP2014523966A (ja) | 2014-09-18 |
KR20140012754A (ko) | 2014-02-03 |
MX2013014524A (es) | 2014-02-19 |
TW201303037A (zh) | 2013-01-16 |
NO347489B1 (no) | 2023-11-20 |
BR112013031991A8 (pt) | 2018-04-03 |
UA115863C2 (uk) | 2018-01-10 |
CA2843210A1 (en) | 2012-12-20 |
WO2012172168A1 (en) | 2012-12-20 |
ZA201309401B (en) | 2015-04-29 |
TWI612147B (zh) | 2018-01-21 |
KR20160087397A (ko) | 2016-07-21 |
RU2013154744A (ru) | 2015-07-20 |
BR112013031991A2 (pt) | 2016-12-20 |
AU2012270290B2 (en) | 2017-02-02 |
CN103732774A (zh) | 2014-04-16 |
EP2718476A1 (en) | 2014-04-16 |
AP3866A (en) | 2016-10-31 |
AP2013007314A0 (en) | 2013-12-31 |
FI123241B (fi) | 2013-01-15 |
AT513441A3 (de) | 2020-03-15 |
AT513441B1 (de) | 2020-03-15 |
AU2012270290A1 (en) | 2014-01-09 |
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