CN104561451A - Alloying method by adding manganese ore in RH refining process - Google Patents
Alloying method by adding manganese ore in RH refining process Download PDFInfo
- Publication number
- CN104561451A CN104561451A CN201310468751.1A CN201310468751A CN104561451A CN 104561451 A CN104561451 A CN 104561451A CN 201310468751 A CN201310468751 A CN 201310468751A CN 104561451 A CN104561451 A CN 104561451A
- Authority
- CN
- China
- Prior art keywords
- manganese ore
- manganese
- steel
- alloying
- ore
- 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.)
- Pending
Links
- 239000011572 manganese Substances 0.000 title claims abstract description 116
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005275 alloying Methods 0.000 title claims abstract description 24
- 238000007670 refining Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011574 phosphorus Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 5
- 230000001351 cycling effect Effects 0.000 claims description 5
- 238000004886 process control Methods 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000011112 process operation Methods 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 230000002829 reductive effect Effects 0.000 description 13
- 239000002893 slag Substances 0.000 description 13
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 12
- 238000003723 Smelting Methods 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 229910000640 Fe alloy Inorganic materials 0.000 description 8
- 229910000616 Ferromanganese Inorganic materials 0.000 description 8
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 229910000720 Silicomanganese Inorganic materials 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000011651 chromium Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 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 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000005453 pelletization Methods 0.000 description 5
- 229910000914 Mn alloy Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005262 decarbonization Methods 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 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
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 229910018619 Si-Fe Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910008455 Si—Ca Inorganic materials 0.000 description 1
- 229910008289 Si—Fe Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- ZWXOQTHCXRZUJP-UHFFFAOYSA-N manganese(2+);manganese(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Mn+2].[Mn+3].[Mn+3] ZWXOQTHCXRZUJP-UHFFFAOYSA-N 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a manganese ore adding alloying method in the RH refining process, 1) the RH treatment initial molten steel temperature is controlled at 1580-; 2) before RH alloying, adding manganese ore into the alloy chute in 2-5 batches, wherein the particle size of the added manganese ore is required to be 10-50mm, the mass percentage content of manganese ore phosphorus and sulfur is required to be less than 0.05%, and the addition amount of the manganese ore is not more than 15kg per ton of steel; 3) after adding manganese ore, the RH ascending pipe promotes the gas flow to be controlled at 130-150NM3Between/h; the circulation time is controlled to be 6-10 min; the vacuum chamber pressure is less than 150 Pa; 4) and (4) after the circulation operation is finished, performing deoxidation alloying, and adjusting the components of the molten steel to the target value of the steel grade. The invention has simple process operation, does not need to improve the original equipment, does not influence other production operations, and can obviously reduce the steelmaking cost.
Description
Technical field
The present invention relates to a kind of smelting containing manganese steel method, particularly a kind of process for making adopting manganese ore alloying.
Background technology
Manganese is one of main alloy element in ferrous materials, has important effect for strengthening steel performance, when manganese element alloying is carried out in steel-making usually, adopts iron alloy such as ferromanganese, ferro-silico-manganese etc. containing manganese to carry out alloying of manganese in tapping or refining process.But the iron alloy such as ferromanganese, ferro-silico-manganese that alloying uses all need adopt manganese ore to obtain in ferroalloy works, the process manufacturing the iron alloy such as ferromanganese, ferro-silico-manganese is the process of a high energy consumption, high pollution, causes environmental pollution and STEELMAKING PRODUCTION cost to increase the most at last.
Manganese ore kind is more, different according to mineral composition, can be divided into pyrolusite, brunite, hausmannite, manganite, psilomelane, rhodochrosite, calcimangite etc., except containing except useful Mn oxide in manganese ore, also containing SiO
2, Al
2o
3, MgO, CaO, P, S etc.In order to reduce steel-making cost and reduce environmental pollution, some steel-making enterprises add manganese ore and carry out alloying of manganese in steel melting furnace, but the recovery rate of manganese is lower, be only 40%-60%, and make the oxidisability of slag improve after adding manganese ore in steel melting furnace, lining erosion is serious, two slag or duplex technique usually also to be coordinated in addition, therefore comprehensive cost is higher, is difficult to realize industrialization; Also have some enterprises to adopt molten steel to add and carry out alloying containing the pelletizing of manganese ore and reductive agent or block simultaneously, but ball processed or block cost higher, be difficult to industrial production and apply.
Patent " duplex steelmaking technique of revolving furnace ", (publication number: CN101294230A) discloses a kind of duplex steelmaking technique of revolving furnace, and in decarbonizing furnace, use manganese ore to carry out alloying.Converter smelting comprises dephosphorization technology and decarbonization process, converter smelting completes in two converters, wherein dephosphorization technology completes in converter I, decarbonization process completes in converter II, manganese ore can be added to regulate thermal equilibrium and to improve terminal Fe content in decarbonization process, the consumption of tapping process manganeseirom can be reduced, more outstanding to the smelting superiority of high mangaenese steel, ultra-low phosphoretic steel etc., reduce smelting cost.This invention can save iron alloy containing manganese as the consumption such as ferromanganese, ferro-silico-manganese.But adopt duplex technique, need equipment support, dephosphorization converter and decarburization converter must be had to coordinate, and for the enterprise not having duplex processing unit, be obviously not suitable for, application limitation is larger.
Patent " producing the method containing manganese, chromium low alloy steel with dephosphorization molten iron and manganese ore, chrome ore ", (publication number: CN101570805A) discloses a kind of dephosphorization molten iron and manganese ore, chrome ore of adopting and produces the converter steel making method containing manganese, chromium low alloy steel.According to the requirement of steel grade to manganese, chromium content before blowing, by, lower limit calculates the usage quantity of manganese ore and chrome ore, adds manganese ore and chrome ore continuously after starting to blow 3-10 minute; Blowing, after terminal, stops top blast, retains bottom blowing with molten steel in rabbling roaster and slag; Manganese, chromium content in sampling analysis steel, and calculate the middle Cr that slags tap accordingly
2o
3and the quantity of FeO, calculate required reductive agent quantity and the corresponding amount of lime added; Ferrosilicon and lime are dropped in stove, continues bottom blowing and blow as reductibility; Through the blowing of 3-12 minute reductibility, make the manganese of 95%-98% weight in manganese ore and chrome ore and chromium absorb by molten steel, achieve and replace ferromanganese, ferrochrome with manganese ore, chrome ore.Advantage is, can maximally utilise manganese, chromium resource, also can eliminate the pollution of hexavalent chromium to environment.But this technique is comparatively large due to the converter quantity of slag, needing to consume relatively large reductive agent could be reduced to manganese by part manganese oxide in manganese ore, and therefore cost advantage is not given prominence to.
Patent " a kind of Mn oxide DIRECT ALLOYING process for making ", (publication number: CN1470667A) discloses a kind of molten steel high temperature that utilizes and manganese direct melting from Mn oxide is reduced into manganese metal and molten steel is carried out to the method for DIRECT ALLOYING, this technique comprises Mn oxide is mixed with manganese alloy pelletizing, in electric furnace or converter tapping process, manganese alloy pelletizing is joined in molten steel in batches, molten steel high temperature is utilized manganese direct melting from Mn oxide to be reduced into manganese metal and to carry out DIRECT ALLOYING to molten steel, simultaneously by blowing hydrogen or other refining route to improve and the rate of recovery of stable manganese.To be the Mn oxide that is greater than 40% by Fe content become 50-200 object powder with addition of the reductive agent of 5%-15%, 1%-5% heat-generating agent, 1%-2% catalyzer through crushing grinding to described manganese alloy pelletizing, then mixing to be made by binding agent, reductive agent is metal A l, Si, Ca etc., heat-generating agent is Al, SiC, Si-Fe, Si-Ca etc., catalyzer is gac etc.The advantage of this technique is to eliminate production process Smelting Plant being become including Mn-Fe alloy, thus significantly save energy and alleviate environmental pollution, also considerably reduce the production cost of molten steel alloying of manganese.But, although the method eliminates operation Smelting Plant being become manganeseirom, need manganese ore to coordinate with reductive agent, heat-generating agent and catalyzer etc. and make manganese alloy pelletizing to use, still there is complex process, shortcoming that cost is high.
According to thermodynamic principles, under the conventional smelting condition of converter, realize manganese ore direct Reducing and Alloying there is reality possibility, but the factors such as traditional converter smelting quantity of slag is too large, the oxidisability of slag is too strong, endpoint carbon content is too low all will reduce the recovery rate of manganese, general converter smelting manganese yield lower than 30% level, accordingly, if adopt two slag or duplex technique, although converter finishing slag amount can be reduced, but too increase smelting operation difficulty, add tap to tap time simultaneously, steel-making cost is increased, technique is connected and also can causes certain influence.
In addition, no matter be that manganese ore, in mineral, Mn oxide exists, as MnO with value Mn oxide compound usually
2, Mn
2o
3deng, these value Mn oxide compounds can be decomposed into MnO at a low price and discharge oxygen simultaneously more than 1200 DEG C.Therefore, after molten steel directly adds manganese ore, by high-temperature molten steel effect (molten steel temperature is usually more than 1500 DEG C), manganese ore decomposes, direct releasing oxygen, in molten steel, causes molten steel oxygen level sharply to increase, this will significantly increase the consumption of reductive agent, and very easily causes steel inclusion to exceed standard.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of RH refining process and adds manganese ore alloyage process, based on traditional converter sweetening process, when not affecting metallurgical effect, drop into manganese ore at RH vacuum chamber, manganese ore decomposes the oxygen that discharges can carry out molten steel decarburization by the rifle oxygen that is blown in Substitute For Partial top.In addition under vacuum, in steel, the reductibility of C will significantly improve, and its reducing power is better than aluminium in theory, therefore only rely on C in steel to reduce to low price Mn oxide, without the need to additional reducing agent reduction Mn oxide, realize the process for making making manganese ore direct Reducing and Alloying.
In order to achieve the above object, concrete scheme of the present invention comprises the steps:
1) the initial molten steel temperature of RH process controls at 1580-1600 DEG C;
2) before RH alloying, point 2-5 batch, adds manganese ore by alloy chute, and added manganese ore requires that particle diameter is at 10-50mm, and manganese ore phosphorus, sulphur mass percentage all require to be less than 0.05%, prevents phosphorus in steel, sulphur exceeds standard.Manganese ore add-on can according to Fe content in manganese ore, by limit in institute's steelmaking kind requirement Fe content following with addition of, prevent manganese in steel from exceeding standard, but manganese ore weight should not more than 15kg/ ton steel;
3), after adding manganese ore, the flow control of RH upcast lift gas is at 130-150NM
3between/h; Control cycling time at 6-10min; Vacuum chamber pressure is less than 150Pa.
4) cycle operation carries out deoxidation alloying after terminating, and adjustment molten steel composition is to steel grade target value.
In step 1), temperature controls at 1580-1600 DEG C, and temperature is conducive in molten steel higher than 1580 DEG C that C is to the reduction of manganese ore, and however, for preventing refractory corrosion and continuous casting steel temperature connection problem, liquid steel temperature should control below 1600 DEG C.
Step 2) manganese ore granularity is 10-50mm, is conducive to manganese ore rapid melting; Point 2-5 criticizes and adds manganese ore and be conducive to the reaction of slag continuous uniform.
In step 3), promote the flow control of argon gas at 130-150NM
3between/h, can ensure that melting manganese ore enters ladle by downtake, strengthen slag-metal reaction effect.Control cycling time at 6-10min, can ensure that slag fully reacts.It is reducing power in order to improve C that vacuum chamber pressure is less than 150Pa.
In step 4), if when Fe content requires lower than steel grade in steel, add appropriate iron alloy such as ferromanganese, ferro-silico-manganese etc. containing manganese and adjust, add other alloy adjustment molten steel component simultaneously and meet steel grade requirement.
Adopt method of the present invention, on the one hand, because molten steel in vacuum chamber is without Slag Layer, after adding manganese ore, manganese ore directly contacts with molten steel, significantly can promote the recovery rate of manganese; On the other hand, due under vacuum, in steel, the reducing power of C significantly improves, the Mn oxide that therefore in steel, C can reduce in manganese ore to greatest extent, promotes the recovery rate of manganese.Solve in existing process for making is that the alloying route cost of raw material is high and Mn series alloy production process energy consumption is high, pollute the problems such as large with Mn series alloy.Also solve adopt in two slag or duplex technique stove add that manganese ore causes that smelting operation difficulty is large, tap to tap time length, complex process, manganese yield is low and lining erosion is serious problem.The present invention removes Mn oxide in reduction manganese ore without the need to additionally adding reductive agent, only both can realize Mn oxide reduction by carbon in molten steel; Simultaneously due to manganese ore decomposes release part of oxygen, can carry out molten steel decarburization by the rifle oxygen that is blown in Substitute For Partial top, in manganese ore, the recovery rate of manganese can reach more than 95%; Can significantly reduce oxygen consumption in addition, technological operation is simple, does not need to improve original equipment, do not affect other production operation, significantly can reduce steel-making cost.
Embodiment
The invention will be further described below:
Embodiment 1:
Embodiment steel grade chemical composition is:
C:0.0015%-0.0035%;Si:0.01%-0.03%;Mn:0.10%-0.20%;P:≤0.015%;S:≤0.010%;Als:0.015%-0.045%;Ti:0.05%-0.08%。
1) RH process starting temperature is 1590 DEG C.
2), before RH alloying, divide 3 batches, add manganese ore by alloy chute, added manganese ore particle diameter is between 15-35mm, and manganese ore phosphorus, sulphur content are all less than 0.05%.Manganese ore add-on 400kg, be 100 tons of calculating according to tap, actual manganese ore add-on is 4kg/ ton steel.
3), after adding manganese ore, the flow control of RH upcast lift gas is at 135NM
3/ h; Cycling time is 7min; Vacuum chamber pressure is 50Pa.
4) after cycle operation terminates, because in steel, Fe content reaches 0.14%, met the requirement of steel grade lower limit, therefore adjusted without the need to iron alloy such as ferromanganese, the ferro-silico-manganese etc. added containing manganese.Add other alloy adjustment molten steel component and meet steel grade requirement.Molten steel terminal composition is: C:0.0022%; Si:0.02%; Mn:0.14%; P:0.014%; S:0.009%; Als:0.033%; Ti:0.06%.
The final recovery rate analyzing manganese in manganese ore after testing reaches 95%.
Embodiment 2:
C:0.01%-0.03%;Si:0.01%-0.03%;Mn:0.18%-0.25%;P:≤0.015%;S:≤0.015%;Als:0.025%-0.055%。
1) RH process starting temperature is 1595 DEG C.
2), before RH alloying, divide 5 batches, add manganese ore by alloy chute, added manganese ore particle diameter is between 15-35mm, and manganese ore phosphorus, sulphur content are all less than 0.05%.Manganese ore add-on 550kg, be 100 tons of calculating according to tap, actual manganese ore add-on is 5.5kg/ ton steel.
3), after adding manganese ore, the flow control of RH upcast lift gas is at 145NM
3/ h, cycling time is 9min; Vacuum chamber pressure is 140Pa.
4) after cycle operation terminates, because in steel, Fe content reaches 0.20%, met the requirement of steel grade lower limit, therefore adjusted without the need to iron alloy such as ferromanganese, the ferro-silico-manganese etc. added containing manganese.Add other alloy adjustment molten steel component and meet steel grade requirement.Molten steel terminal composition: 0.02%; Si:0.02%; Mn:0.20%; P:0.015%; S:0.011%; Als:0.041%.
The final recovery rate analyzing manganese in manganese ore after testing reaches 96%.
Claims (1)
1. RH refining process adds a manganese ore alloyage process, it is characterized in that comprising the steps:
1) the initial molten steel temperature of RH process controls at 1580-1600 DEG C;
2) before RH alloying, point 2-5 batch, adds manganese ore by alloy chute, and added manganese ore requires that particle diameter is at 10-50mm, and manganese ore phosphorus, sulphur mass percentage all require to be less than 0.05%, and manganese ore add-on is no more than 15kg/ ton steel;
3), after adding manganese ore, the flow control of RH upcast lift gas is at 130-150NM
3between/h; Control cycling time at 6-10min; Vacuum chamber pressure is less than 150Pa;
4) cycle operation carries out deoxidation alloying after terminating, and adjustment molten steel composition is to steel grade target value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310468751.1A CN104561451A (en) | 2013-10-10 | 2013-10-10 | Alloying method by adding manganese ore in RH refining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310468751.1A CN104561451A (en) | 2013-10-10 | 2013-10-10 | Alloying method by adding manganese ore in RH refining process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104561451A true CN104561451A (en) | 2015-04-29 |
Family
ID=53078524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310468751.1A Pending CN104561451A (en) | 2013-10-10 | 2013-10-10 | Alloying method by adding manganese ore in RH refining process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104561451A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109897931A (en) * | 2019-04-01 | 2019-06-18 | 山东钢铁集团日照有限公司 | A kind of oxidizable element steel grade bof process production alloy addition optimization method of big alloy amount |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005015890A (en) * | 2003-06-27 | 2005-01-20 | Jfe Steel Kk | Method for producing low-carbon high-manganese steel |
| CN102828098A (en) * | 2012-09-25 | 2012-12-19 | 鞍钢股份有限公司 | Method for increasing molten steel terminal manganese content by adding manganese ore outside furnace |
| CN103276152A (en) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | Method for decarbonizing manganese ore added with RH |
-
2013
- 2013-10-10 CN CN201310468751.1A patent/CN104561451A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005015890A (en) * | 2003-06-27 | 2005-01-20 | Jfe Steel Kk | Method for producing low-carbon high-manganese steel |
| CN102828098A (en) * | 2012-09-25 | 2012-12-19 | 鞍钢股份有限公司 | Method for increasing molten steel terminal manganese content by adding manganese ore outside furnace |
| CN103276152A (en) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | Method for decarbonizing manganese ore added with RH |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109897931A (en) * | 2019-04-01 | 2019-06-18 | 山东钢铁集团日照有限公司 | A kind of oxidizable element steel grade bof process production alloy addition optimization method of big alloy amount |
| CN109897931B (en) * | 2019-04-01 | 2021-07-09 | 山东钢铁集团日照有限公司 | Method for optimizing alloy addition in converter process production of high-alloy-quantity easily-oxidizable element steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103882181B (en) | Manganese-containing steel alloying process | |
| CN102787196B (en) | Method for smelting stainless steel by direct reduced iron | |
| CN102828098A (en) | Method for increasing molten steel terminal manganese content by adding manganese ore outside furnace | |
| CN103469049B (en) | Molybdenum oxide DIRECT ALLOYING process for making | |
| CN101775508B (en) | Production method of low-carbon ferromanganese | |
| CN103627842B (en) | Method for enhancing end point carbon content in smelting medium-carbon steel from semisteel and semisteel steelmaking method | |
| CN102134628A (en) | Smelting method of low-carbon aluminium killed steel with low silicon content | |
| CN105039648A (en) | Method for smelting low-carbon and high-manganese-content molten steel through argon oxygen decarburizing furnace | |
| CN103627839B (en) | Semisteel steelmaking carbon content control method and semisteel steelmaking method | |
| CN103627971A (en) | Alloy structural steel for large-specification soldering tools and smelting method thereof | |
| CN103642971A (en) | Method for improving steelmaking end-point carbon content of semisteel and semisteel steelmaking method | |
| CN107365949A (en) | A kind of method of smelting ultralow-carbon high-alloy stainless steel | |
| CN106148631A (en) | A kind of method of converter smelting low-sulfur ultralow nitrogen molten steel | |
| CN105506226A (en) | Method for carrying out pre-desiliconization, pre-decarburization and pre-dephosphorization on molten iron in molten iron tank | |
| CN103627851B (en) | Semisteel steelmaking temperature control method and semisteel steelmaking method | |
| CN103642966B (en) | Method for improving high-carbon high-manganese steel converter smelting endpoint carbon content and steelmaking method | |
| CN103215408B (en) | A kind ofly add the method that slag block carries out converter steelmaking | |
| CN103031401A (en) | Method for converter steelmaking by LF (Ladle Furnace) refining furnace reducing slag | |
| CN101899604B (en) | Direct alloying steelmaking process for manganese oxide composite briquettes used for re-blowing revolving furnace | |
| CN104946845A (en) | Method for producing high-carbon-chrome bearing steel from vanadium-titanium-containing molten iron | |
| CN113430334A (en) | GOR smelting method for improving scrap steel ratio of 200 series stainless steel | |
| CN105506271B (en) | Chrome ore composite pellet and its production method and application are used in a kind of argon oxygen decarburizing furnace reduction | |
| CN103031409B (en) | Novel process of steelmaking deoxidization by utilizing precipitator dust of refining furnace | |
| CN105483316A (en) | Direct alloying method of chrome ores in converter | |
| CN104561451A (en) | Alloying method by adding manganese ore in RH refining process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |