CS271729B1 - Method of refining ferrochromium production in electric arc furnace - Google Patents
Method of refining ferrochromium production in electric arc furnace Download PDFInfo
- Publication number
- CS271729B1 CS271729B1 CS884314A CS431488A CS271729B1 CS 271729 B1 CS271729 B1 CS 271729B1 CS 884314 A CS884314 A CS 884314A CS 431488 A CS431488 A CS 431488A CS 271729 B1 CS271729 B1 CS 271729B1
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- CS
- Czechoslovakia
- Prior art keywords
- chromium
- silicon
- ferrochromium
- per
- charge
- Prior art date
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- 229910000604 Ferrochrome Inorganic materials 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000010891 electric arc Methods 0.000 title claims abstract description 5
- 238000007670 refining Methods 0.000 title abstract 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 239000011651 chromium Substances 0.000 claims abstract description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 239000004571 lime Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 150000001720 carbohydrates Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- DYRBFMPPJATHRF-UHFFFAOYSA-N chromium silicon Chemical compound [Si].[Cr] DYRBFMPPJATHRF-UHFFFAOYSA-N 0.000 claims 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 229940117975 chromium trioxide Drugs 0.000 description 2
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 206010043183 Teething Diseases 0.000 description 1
- CWVZGJORVTZXFW-UHFFFAOYSA-N [benzyl(dimethyl)silyl]methyl carbamate Chemical compound NC(=O)OC[Si](C)(C)CC1=CC=CC=C1 CWVZGJORVTZXFW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Vynález se týká výroby raflnačného ferochrómz eilikotermickým epoeobom v elektricje oblúkovej peci, ktorý je kombinovaný a postupom doredukovania troeky mimopecným spísobom ·BACKGROUND OF THE INVENTION 1. Field of the Invention
V súčasnosti používané sposoby výroby raflnačného ferochrómu v slektrickej oblúkovej peci sú zamerané na maximálně možné využitie chrómu a tým redukciu trosky v elektrickej oblúkovej peci na nízký obsah kyeličníka chromitého, ktorého obsah sa pohybuje okolo 4 až 6 %· V inom spoaobo sa v elektrickoj peci netaví rudnovápenatá zmes, ktorá sa mimopecne doredukováva silikochrómom· Nedostatkom postupu v slektrickej peci je riziko nakremičenia kovu pri hlbokej redukcii trosky a z toho dovodu náročné dokončovanie * tavby, pričom ea navylúči výmět čaeti výroby pre vysoký obeah kremíka v kove. Mimo to uvedený spósob výroby vyžaduje vedenie tavby pod troskou s vysokou zásaditoetou, mini- .The currently used methods for the production of refractory ferochrome in the sleeve arc furnace are aimed at maximizing the use of chromium and thereby reducing the slag in the electric arc furnace to a low chromium trioxide content of about 4 to 6%. Reductive lime mixture, which is inherently reduced by silicochrome · A drawback in the slewing furnace is the risk of metal sputtering during deep slag reduction and consequently difficult finishing * of the smelting, while increasing the discard of production for high obeah silicon in the metal. In addition, the aforesaid method of production requires conduction of the melting under the slag with a high alkali, mini- mum.
málne 2,0 vyjádřenou pomerom kysličnika vápenatého ku kyeličníku křemičitému, čím sa zvyšuje energetická náročnost výroby·at least 2.0 expressed as the ratio of calcium oxide to silica, which increases the energy
Uvedené nevýhody odstraňuje eposob výroby raflnačného ferochrómu a obsahom kremíka do 1 % hmotnosti v slektrickej oblúkovej peci, podlá vynálezu· Podetata vynálezu tkvie v tom, že sa najprv roztaví prvá čaet veádzky o hmotnostnom zložení 63 až 80 kg kyeličnika vápenatého vo formě vápna a 5,3 až 8,5 kg kremíka vo formo silikochrómu na 100 kg chrómovéJ rudy a potom ea do tavby přidává druhá čest veádzky tvořená 6,4 až 11 kg kremika vo formě silikochrómu na 100 kg chrómovej rudy· Pri výrobě ferochrómu a obsahom uhlíka 0,15 až 4 % hmotnosti ea do prvej čaeti veádzky přidává nauhličovadlo vo formo ferochrómu uhlíkatého alebo vrotného odpadu z výroby, v množstva 0,5 až 20 kg na 100 kg chrómovej rudy· rVýhodou poetupu podle vynálezu js; že pri stanovených množetvách kysličnika vápenatého a kremíka vo veádzke a postupu vedsnia tavby js zaručený obsah kysličnika chromitého 6 až 15 % hmot· V troska a tým podmienky pre výrobu zliatiny e nízký obeahom kremíka, do 1,0 % hmotnosti· Ookončovanie tavby je nenáročné a pri nižéej záeaditoeti troeky je súčasne energeticky menej náročné· Ooredukovanim trosky tekutým sillkochrómom ea zleka obohatený eilikochróm· Pri použití takto získaného silikochrómu do veádzky v elektrickej oblúkovej peci ea získá ferochróm s nízký obeahom uhlíka, napr· 0,05 % hmotnosti a fosforu napr. 0,025 % hmotnosti· Uvedený postup je vhodný tiež pra výrobu raflnačného ferochrómu e uhlikom od 0,15 do 4 %, pričom potřebné množstvo nauhličovadla vo formě uhlíkatého ferochrómu alebo vratného odpadu ee vaádzkuje do prvej časti tavby·The present invention is based on the fact that the first batch of a mass of 63 to 80 kg of calcium cyanide in the form of lime and 5 is melted first, and the silicon content of up to 1% by weight in a sleeve-type arc furnace is eliminated. 3 to 8.5 kg silicon in the form of silicochrome for 100 kg of chrome ore and then adds a second honor of 6.4-11 kg of silicon in the form of silicochrome for 100 kg of chrome ore up to 4% by weight ea adds a carbohydrate in the form of ferro-chromium carbon or wastes from the production, in the amount of 0.5 to 20 kg per 100 kg of chrome ore, to the first part of the process. that at specified amounts of calcium oxide and silicon in the process and process, the melting side is guaranteed to have a chromium trioxide content of 6 to 15% by weight · slag and thus alloying conditions e low silicon content, up to 1.0% by weight · at the same time, it is less energy intensive at the same time · Reducing the slag with liquid sillochrome e and slightly enriched eilicochrome · Using the thus obtained silicochrome in the furnace in an electric arc furnace e, it obtains a low-carbon ferrochromium, e.g. 0.025% by weight · The process is also suitable for the production of refractory ferochrome e with a carbon of from 0.15 to 4%, while the required amount of carbohydrate in the form of carbonaceous ferochrome or return waste is fed into the first part of the melt ·
Příklad 1Example 1
Vsádzka ea do slektrickej oblúkovej pece dává po čaatiach· V prvej čaeti bol nadávkovaný na dno pece eilikochróm v množstve 900 kg s obsahom 50 % hmotnosti kremíka· Po zapnutí sa zavezlo zvyéok prvej čaeti tj· 7 000 kg chrómovej rudy s hmotnostným obeahom 52,06 % kysličnika chromitého, 5,77 % kysličnika křemičitého, 11,79 % kyeličníka želez- 1 natého, 7,34 % kyeličníka hlinitého,4 18,68 % kyeličníka horečnatého, 0,82 % kyeličníka vápenatého; zbytok kysličníky otopových prvkov ako niklu, vanadu, manganu apod· S chró- | movou rudou sa zaváža 5 900 kg vápna, záeaditoet vytvorenej troeky činí 1,61· Po roztavení uvedenej prvej čaeti veádzky sa do pece zaváža druhé čaet tvořená 1200 kg eilikochrómu obeahujúceho 50 % hmotnosti kremíka a to nadvakrát· Odpíchne ea ferochróm a troska, z ktorej es mimopecne doredukuje chróm až na obsah 0,89 % hmotnosti kysličnika chromltého. Získaný ferochróm obsahuje v hmotnostných podleloch 0,06 % uhlíku; 0,52 % křemíku, 70,3 % chrómu, 0,027 % fosforu, 0,003 % eíry, zvyéok železo.Charging ea into the sleeve arc furnace after teething · In the first stage, 900 kg of eilicochrome was loaded onto the bottom of the furnace containing 50% by weight of silicon. % of chromium oxide, 5.77% of silica, 11.79% of iron (II) oxide, 7.34% of aluminum (III), 4 18.68% of magnesium (II), 0.82% of calcium (II); the rest of the oxides of heating elements such as nickel, vanadium, manganese, etc. · With chromium | 5 900 kg of lime is charged, the amount of tiny lime is 1.61 · After melting the first part of the plant, a second portion of 1200 kg of eilicochrome containing 50% of the silicon is charged to the furnace twice. In addition, chromium reduces the chromium to a content of 0.89% by weight of chromium oxide. The ferro-chromium obtained contains 0.06% carbon by weight; 0.52% silicon, 70.3% chromium, 0.027% phosphorus, 0.003% er, residual iron.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS884314A CS271729B1 (en) | 1988-06-21 | 1988-06-21 | Method of refining ferrochromium production in electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS884314A CS271729B1 (en) | 1988-06-21 | 1988-06-21 | Method of refining ferrochromium production in electric arc furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS431488A1 CS431488A1 (en) | 1990-03-14 |
| CS271729B1 true CS271729B1 (en) | 1990-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS884314A CS271729B1 (en) | 1988-06-21 | 1988-06-21 | Method of refining ferrochromium production in electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS271729B1 (en) |
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1988
- 1988-06-21 CS CS884314A patent/CS271729B1/en unknown
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| Publication number | Publication date |
|---|---|
| CS431488A1 (en) | 1990-03-14 |
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