FI93745B - Förfarande för kontrollering av svavel- och kiselhalten vid framställning av ferrokrom - Google Patents
Förfarande för kontrollering av svavel- och kiselhalten vid framställning av ferrokrom Download PDFInfo
- Publication number
- FI93745B FI93745B FI890003A FI890003A FI93745B FI 93745 B FI93745 B FI 93745B FI 890003 A FI890003 A FI 890003A FI 890003 A FI890003 A FI 890003A FI 93745 B FI93745 B FI 93745B
- Authority
- FI
- Finland
- Prior art keywords
- slag
- reduction
- ferrochrome
- heating vessel
- carbonaceous
- Prior art date
Links
- 229910000604 Ferrochrome Inorganic materials 0.000 title claims description 37
- 238000000034 method Methods 0.000 title claims description 23
- 229910052717 sulfur Inorganic materials 0.000 title claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 17
- 229910052710 silicon Inorganic materials 0.000 title claims description 17
- 239000010703 silicon Substances 0.000 title claims description 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims description 16
- 239000011593 sulfur Substances 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title description 3
- 239000002893 slag Substances 0.000 claims description 37
- 239000000292 calcium oxide Substances 0.000 claims description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000003575 carbonaceous material Substances 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 238000011946 reduction process Methods 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims 1
- 229910052906 cristobalite Inorganic materials 0.000 claims 1
- 230000007717 exclusion Effects 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 229910052682 stishovite Inorganic materials 0.000 claims 1
- 229910052905 tridymite Inorganic materials 0.000 claims 1
- 239000003245 coal Substances 0.000 description 12
- 239000000155 melt Substances 0.000 description 9
- 238000006477 desulfuration reaction Methods 0.000 description 8
- 230000023556 desulfurization Effects 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 238000003723 Smelting Methods 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 206010011416 Croup infectious Diseases 0.000 description 4
- 238000007792 addition Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- IUHFWCGCSVTMPG-UHFFFAOYSA-N [C].[C] Chemical group [C].[C] IUHFWCGCSVTMPG-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 101000652337 Homo sapiens Transcription factor SOX-21 Proteins 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 102100030247 Transcription factor SOX-21 Human genes 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- -1 carbon-10 lipid Chemical class 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance 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
- 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
- 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
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Silicon Compounds (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture Of Iron (AREA)
Claims (9)
1. Förfarande för avlägsning av svavel frän ferro-krom som framställts genom ett förfarande, i vilket en 5 kromitmalm är starkt förreducerad med kolhaltiga reduce-ringsmedel, kännetecknat därav, att nämnda förreducerade kromitmalm tillsammans med samtliga slagg-bildande komponenter och kolhaltigt restreduceringsmedel, som erhälls frän förreduceringsprocessen, mätäs tili ett 10 uppvärmningskärl och smälts däri i närvaro av kalciumoxid och ett kolhaltigt material, vilket minst delvis bestär av det kolhaltiga restreduceringsmedlet frän förreduceringsprocessen.
2. Förfarande enligt patentkrav 1, kanne-15 tecknat därav, att uppvärmningskärlet har en exakt kontroll av reduceringsförhällandena genom att slaggets reducerings/oxideringspotential kontrolleras.
3. Förfarande enligt patentkrav 2, kännetecknat därav, att kontrollen över slaggets reduce- 20 rings/oxideringspotential uppnäs genom att uppvärmningskärlet stängs antingen för uteslutning eller kontrollerat insläpp av luft i jämvikt med en tillsats av kolhaltigt material eller kromitmalm däri.
4. Förfarande enligt patentkrav 1, k ä n n e -25 tecknat därav, att slagget i uppvärmningskärlet innehäller minst 7 massa-% av kalciumoxid.
5. Förfarande enligt patentkrav 1, kännetecknat därav, att slaggets basicitetsförhällande, vilket bestäms som kvoten 30 massa-% CaO + massa-% MqO massa-% Si02 är minst 1,2.
6. Förfarande enligt patentkrav 1, k ä n n e -35 tecknat därav, att kiselhalten hos ferrokrom regie- k 93745 ras med ett kontrollerat luftinsläpp i det tillslutna upp-värmningskärlet för att ästadkomma en förhöjning eller minskning av slaggets reducerings/oxideringspotentialnivä.
7. Förfarande enligt patentkrav 1, känne- 5 tecknat därav, att kontrollen av kiseln i ferrokrom regleras genom att kiseldioxidens aktivitet eller relative koncentration i slagget kontrolleras.
8. Förfarande enligt patentkrav 7, känne- tecknat därav, att kontrollen av kiseldioxidens 10 aktivitet eller relativa koncentration i slagget ästadkoms genom att större eller mindre mängder CaO tillsätts tili slagget.
9. Förfarande enligt patentkrav 1, känne- tecknat därav, att metalliserad krom, som ingär i 15 produkten som inmatats i uppvärmningskärlet, bildar minst 80 % av den krom som ursprungligen är närvarande i kromit-malmen, vilken används i förreduceringsprocessen. M
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA878300 | 1988-01-05 | ||
| ZA8708300 | 1988-01-05 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI890003A0 FI890003A0 (sv) | 1989-01-02 |
| FI890003L FI890003L (sv) | 1989-07-06 |
| FI93745B true FI93745B (sv) | 1995-02-15 |
| FI93745C FI93745C (sv) | 1995-05-26 |
Family
ID=25579050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI890003A FI93745C (sv) | 1988-01-05 | 1989-01-02 | Förfarande för kontrollering av svavel- och kiselhalten vid framställning av ferrokrom |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4971622A (sv) |
| JP (1) | JPH01215950A (sv) |
| BR (1) | BR8900022A (sv) |
| FI (1) | FI93745C (sv) |
| GR (1) | GR1000523B (sv) |
| IT (1) | IT1230456B (sv) |
| PH (1) | PH26423A (sv) |
| SE (1) | SE466315B (sv) |
| TR (1) | TR27725A (sv) |
| ZW (1) | ZW18288A1 (sv) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5575829A (en) * | 1995-06-06 | 1996-11-19 | Armco Inc. | Direct use of sulfur-bearing nickel concentrate in making Ni alloyed stainless steel |
| US5567224A (en) * | 1995-06-06 | 1996-10-22 | Armco Inc. | Method of reducing metal oxide in a rotary hearth furnace heated by an oxidizing flame |
| AUPN461695A0 (en) * | 1995-08-07 | 1995-08-31 | Technological Resources Pty Limited | A process for reducing iron oxides |
| BR112015028930A2 (pt) * | 2013-06-03 | 2017-07-25 | Midrex Technologies Inc | método para produzir um produto cromo em fusão com alto teor de carbono e alta pureza |
| JP7566743B2 (ja) * | 2019-07-12 | 2024-10-15 | Ｊｆｅマテリアル株式会社 | スラグの無害化方法及び低炭素フェロクロムの製造方法 |
| JP7035280B2 (ja) * | 2019-07-12 | 2022-03-14 | Ｊｆｅマテリアル株式会社 | 低炭素フェロクロムの製造方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2098176A (en) * | 1934-03-19 | 1937-11-02 | Marvin J Udy | Manufacture of chrome ore preparations |
| US3865574A (en) * | 1972-07-20 | 1975-02-11 | Lummus Co | Process for the production of low-sulfur prereduced iron pellets |
| JPS5019486A (sv) * | 1973-06-01 | 1975-02-28 | ||
| JPS5770219A (en) * | 1980-10-21 | 1982-04-30 | Nisshin Steel Co Ltd | Method for dephosphorizing, desulfurizing and denitrifying iron alloy |
| JPS58151416A (ja) * | 1982-03-03 | 1983-09-08 | Sumitomo Metal Ind Ltd | クロムを含む溶融鉄合金の脱燐・脱硫方法 |
| JPS5985841A (ja) * | 1982-11-09 | 1984-05-17 | Nippon Kokan Kk <Nkk> | フエロクロムの製造方法 |
| JPS60121211A (ja) * | 1983-12-02 | 1985-06-28 | Nippon Steel Corp | 含クロム溶鋼の還元脱硫法 |
| DE3347686C1 (de) * | 1983-12-31 | 1985-04-18 | Fried. Krupp Gmbh, 4300 Essen | Verfahren zur Herstellung von Ferrochrom |
| PH22151A (en) * | 1983-12-31 | 1988-06-01 | Krupp Gmbh | Process for the production of ferrochromium |
| DE3442245A1 (de) * | 1984-11-19 | 1986-05-28 | Japan Metals & Chemicals Co., Ltd., Tokio/Tokyo | Verfahren zur herstellung einer legierung mit hohem chromgehalt durch schmelzreduktion |
| US4783219A (en) * | 1985-11-13 | 1988-11-08 | Nippon Kokan Kabushiki Kaisha | Method for melting and reducing chrome ore |
| US4790872A (en) * | 1988-01-19 | 1988-12-13 | Hamilton Specialty Bar Division Of Slater Industries, Inc. | Additive for promoting slag formation in steel refining ladle |
-
1988
- 1988-12-30 ZW ZW182/88A patent/ZW18288A1/xx unknown
- 1988-12-30 SE SE8804710A patent/SE466315B/sv not_active IP Right Cessation
-
1989
- 1989-01-02 FI FI890003A patent/FI93745C/sv not_active IP Right Cessation
- 1989-01-04 GR GR890100004A patent/GR1000523B/el not_active IP Right Cessation
- 1989-01-04 PH PH38001A patent/PH26423A/en unknown
- 1989-01-04 US US07/293,368 patent/US4971622A/en not_active Expired - Fee Related
- 1989-01-04 IT IT8947503A patent/IT1230456B/it active
- 1989-01-04 BR BR898900022A patent/BR8900022A/pt not_active IP Right Cessation
- 1989-01-05 TR TR00034/89A patent/TR27725A/xx unknown
- 1989-01-05 JP JP64000816A patent/JPH01215950A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| PH26423A (en) | 1992-07-15 |
| SE8804710L (sv) | 1989-07-06 |
| FI890003L (sv) | 1989-07-06 |
| FI93745C (sv) | 1995-05-26 |
| IT8947503A0 (it) | 1989-01-04 |
| JPH0563541B2 (sv) | 1993-09-10 |
| SE8804710D0 (sv) | 1988-12-30 |
| GR1000523B (el) | 1992-08-25 |
| JPH01215950A (ja) | 1989-08-29 |
| ZW18288A1 (en) | 1989-04-19 |
| TR27725A (tr) | 1995-06-22 |
| IT1230456B (it) | 1991-10-23 |
| FI890003A0 (sv) | 1989-01-02 |
| US4971622A (en) | 1990-11-20 |
| BR8900022A (pt) | 1989-08-15 |
| SE466315B (sv) | 1992-01-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BB | Publication of examined application | ||
| MM | Patent lapsed |
Owner name: MIDDELBURG STEEL AND ALLOYS |