CN101503743A - Production process for producing special purpose cast iron by blast furnace and electric furnace duplex weak oxidation process - Google Patents
Production process for producing special purpose cast iron by blast furnace and electric furnace duplex weak oxidation process Download PDFInfo
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- CN101503743A CN101503743A CNA200810079667XA CN200810079667A CN101503743A CN 101503743 A CN101503743 A CN 101503743A CN A200810079667X A CNA200810079667X A CN A200810079667XA CN 200810079667 A CN200810079667 A CN 200810079667A CN 101503743 A CN101503743 A CN 101503743A
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- slag
- iron
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003647 oxidation Effects 0.000 title claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 41
- 229910001018 Cast iron Inorganic materials 0.000 title claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 276
- 229910052742 iron Inorganic materials 0.000 claims abstract description 136
- 239000000203 mixture Substances 0.000 claims abstract description 103
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 57
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 54
- 239000010936 titanium Substances 0.000 claims abstract description 46
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 42
- 238000005266 casting Methods 0.000 claims abstract description 31
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 20
- 238000000746 purification Methods 0.000 claims abstract description 17
- 238000000465 moulding Methods 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 239000002893 slag Substances 0.000 claims description 89
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 56
- 229910052751 metal Inorganic materials 0.000 claims description 56
- 239000002184 metal Substances 0.000 claims description 56
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 39
- 238000010792 warming Methods 0.000 claims description 36
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 28
- 229910052786 argon Inorganic materials 0.000 claims description 28
- 238000002844 melting Methods 0.000 claims description 25
- 230000008018 melting Effects 0.000 claims description 25
- 239000011651 chromium Substances 0.000 claims description 23
- WJOVWQFKTDNBDT-UHFFFAOYSA-N [S].[P].[Cr].[Ti].[V] Chemical compound [S].[P].[Cr].[Ti].[V] WJOVWQFKTDNBDT-UHFFFAOYSA-N 0.000 claims description 22
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 18
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 18
- 239000005864 Sulphur Substances 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 17
- 229910052717 sulfur Inorganic materials 0.000 claims description 15
- CXCBJSTXZQPTLV-UHFFFAOYSA-N O.[Fe].[Ti].[V] Chemical compound O.[Fe].[Ti].[V] CXCBJSTXZQPTLV-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 13
- 238000002203 pretreatment Methods 0.000 claims description 9
- 238000010009 beating Methods 0.000 claims description 3
- 229910000805 Pig iron Inorganic materials 0.000 abstract description 20
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 229910052748 manganese Inorganic materials 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract description 2
- 230000035484 reaction time Effects 0.000 abstract description 2
- 241001062472 Stokellia anisodon Species 0.000 abstract 2
- 238000003723 Smelting Methods 0.000 abstract 1
- -1 purification Substances 0.000 abstract 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 abstract 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 16
- 229910000029 sodium carbonate Inorganic materials 0.000 description 8
- 235000017550 sodium carbonate Nutrition 0.000 description 8
- 239000011572 manganese Substances 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000011221 initial treatment Methods 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- KRBQUZKKZGAKOJ-UHFFFAOYSA-N [Ti].[P].[S] Chemical compound [Ti].[P].[S] KRBQUZKKZGAKOJ-UHFFFAOYSA-N 0.000 description 1
- NJFMNPFATSYWHB-UHFFFAOYSA-N ac1l9hgr Chemical compound [Fe].[Fe] NJFMNPFATSYWHB-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- ZFDNHUHPLXMMBR-UHFFFAOYSA-N sulfanylidenevanadium Chemical compound [V]=S ZFDNHUHPLXMMBR-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- ADDWXBZCQABCGO-UHFFFAOYSA-N titanium(iii) phosphide Chemical compound [Ti]#P ADDWXBZCQABCGO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a process for producing special purpose pig iron by a blast furnace and electric furnace duplex weak oxidation method, which comprises the steps of smelting molten iron, purification, component adjustment and cast molding, wherein the smelt molten iron is vanadium-titanium molten iron containing various elements including C, Si, Mn, PS, Ti, V and Cr; a treating agent is added into the smelt molten iron, and the mixture is subjected to purification for times and adjusted to the component content required by various types of pig iron; and finally cast molding or casting is performed. The treating agent is added in graded decrease and with unchanged gross amount, so that the reaction intensity is easy to control; a recarburizer can be used for recarburization at any moment; no converter oxygen impact exists, and the dust quantity is small; the content of the molten iron can be easily controlled to the targeted quantity by reasonable temperature, increase of the reaction time and improvement of the addition of an extracting agent; and the problem that domestic manufacturers cannot use a set of equipment to produce various types of special purpose pig iron is solved.
Description
Technical field:
The present invention relates to a kind of treated production technique that obtains special purpose cast iron of vanadium-titanium-iron-water of using, particularly relate to a kind of blast furnace and electric furnace duplex weak oxidation method and produce the production technique of special purpose cast iron, can produce the pig iron raw material that satisfies particular requirement in the Foundry Production.
Background technology:
At present the market requirement of external high quality casting is that Chinese foundry industry begins from the low side foundry goods to the high-end opportunity that strides forward gradually, and the huge quality requirements of domestic automobile engine cylinder-body cylinder head casting, wind power hub foundry goods, glass mold, pump class wearing piece, roll foundry goods is also brought business opportunity to Chinese foundry industry simultaneously.Domestic all possessed the working condition of producing high-end foundry goods from melting equipment, sand preparing machine, moulding equipment, cast equipment and casting technique etc. at present, but the supply that meets the pig iron raw material of producing these class foundry goods requirements becomes the bottleneck that restricts this development.The problem that the pig iron ubiquity impurity element of China exceeds standard makes domestic foundry enterprise can't guarantee the quality of high-quality foundry goods like this.
The special iron criteria for classification:
1) mainly comprises the pig iron of following purposes and characteristic feature composition (per-cent number)
I, the glass mold D type dag iron casting pig iron:
C≥3.4 Si≤0.7 Mn≤0.2 P≤0.05 S?0.02～0.04 V
0.1～0.18 Cr≤0.05 Ti≤0.15
II, the common A type graphite gray iron casting pig iron:
C≥3.4 Si≤0.2 Mn≤0.2 P≤0.05 S≤0.05 Ti≤0.01
V≤0.05 Cr≤0.05
III, wind-power electricity generation low temperature use " ultra-purity pig iron " Q/CBT04-2007
IV, high-ni-cr roll are with the ultralow phosphorus titanium of high vanadium sulphur pig iron:
C 〉=3.4 Si≤0.2 Mn≤0.2 P≤0.05 (or lower) S by customer requirement phosphorus
≤ 0.025 Ti≤0.01 V 〉=0.3 (or lower) Cr≤0.5 by customer requirement phosphorus
V, slag stock pump class wearing piece hang down phosphorus and sulphur pig iron with the high titanium of high vanadium:
C 〉=3.4 Si≤0.2 Mn 〉=0.1 P≤0.07 (or lower) S by customer requirement phosphorus
≤ 0.025 Ti≤0.4V 〉=0.4 Cr 〉=0.4 (or by the reduction of customer requirement chromium)
Summary of the invention:
The present invention is directed to the deficiencies in the prior art, provide a kind of blast furnace and electric furnace duplex weak oxidation method to produce the production technique of special purpose cast iron, provide complete, seriation, production technique with strong points, have energy-conservation, environmental protection, than converter process product yield height, the characteristics of waste ' s reclamation, technical problem to be solved by this invention is to utilize electric furnace to heat up, insulation, induction stirring, argon bottom-blowing stirs the characteristics that purify, use the blast furnace hot metal containing low silicon to go into the electric furnace primary treatment, through the different treatment method pig iron is purified, purification reaches the product that meets special service requirements, the technical solution used in the present invention following (50 ℃ for the treatment of processes temperature losses):
Technical scheme one,
The present invention includes melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, pour molten iron after the agent of adding desiliconization titanium in middle frequency furnace and carry out desiliconization, desiliconization titanium agent add-on adds with reference to " A ", and the slag of getting is to call " vanadium slag " in the following text, and molten iron is warming up to 1400～1450 ℃ after the slag hitting, detects hot metal composition;
3, hot metal ladle is handled: detect composition according to molten iron, in hot metal ladle, add and take off the agent of vanadium-titanium-chromium phosphorus sulphur, take off the agent of vanadium-titanium-chromium phosphorus sulphur, add-on adds with reference to " D ", the electric furnace molten iron is poured, refund electric furnace after the slag hitting and be warming up to 1400～1450 ℃, detect composition, detect composition according to molten iron, as meet I (or II or III) product basis content requirement, then continue next step, as do not meet, take off the agent of vanadium-titanium-chromium phosphorus sulphur with adding in the hot metal ladle again, add-on adds with reference to " D ", the electric furnace molten iron is poured, by that analogy, meet I (or II or III) the product basis content requirement of production needs until component content;
4, the molten iron after the processing is gone into middle frequency furnace, be warming up to 1450～1520 ℃ temperature, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ after beating slag totally and carry out deoxidation, after slag hitting, feed ten minutes argon gas, argon flow amount is 40L/Min, add alloy furnishing product I I, the required corresponding composition of III, the production product I need be blended into an amount of base iron again through adding the required corresponding composition of alloy furnishing product I;
5, to go out electric furnace casting fast or enter the casting link for molten iron.
Technical scheme two:
The present invention includes melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, pour desiliconization of hot metal after middle frequency furnace adds the agent of desiliconization titanium, add-on adds with reference to " A ", does pre-treatment for production I, II, III product, and the slag of getting is to call " vanadium slag " in the following text, and molten iron is warming up to 1400～1450 ℃ after the slag hitting, detects hot metal composition;
3, shaking ladle or rotary drum stove are handled: add in shaking ladle or the rotary drum stove and take off the agent of vanadium-titanium-chromium phosphorus sulphur, add-on adds with reference to " D ", the electric furnace molten iron is poured, detect composition according to molten iron, shaking ladle shakes or the rotary drum stove rotates, detect hot metal composition after the slag hitting, as meet I (or II or III) product basis content requirement, then continue next step, as do not meet, detect composition according to molten iron again and take off the agent of vanadium-titanium-chromium phosphorus sulphur adding in shaking ladle or the rotary drum stove, add-on adds with reference to " D ", continues to start that shaking ladle shakes or the rotary drum stove rotates, and slag hitting detects hot metal composition, by that analogy, contain requirement until the I that meets the production needs (or II or III) product basis matter;
4, the molten iron after the processing is gone into middle frequency furnace, be warming up to 1450～1520 ℃ of temperature with slag beat clean after, fork (inserting) is gone into 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire and is carried out deoxidation when being warming up to 1520 ℃, feed ten minutes argon gas once more after the slag hitting, argon flow amount is 40L/Min, alloy adds furnishing product I I, the required corresponding composition of III, and the production product I need be blended into an amount of base iron and add the required corresponding composition of furnishing product I through alloy again;
5, to go out electric furnace casting fast or enter the casting link for molten iron.
Technical scheme three:
The present invention includes melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, add " vanadium slag " in middle frequency furnace, " vanadium slag " oxygen level obtains numerical value through chemical examination, adds " vanadium slag ", add-on adds with reference to " E ", pours the desiliconization of hot metal titanium and increases vanadium, for production IV, V product are done pre-treatment, be warming up to 1300～1350 ℃ after the slag hitting, detect hot metal composition;
3, hot metal ladle is handled: detect composition according to molten iron, add the agent of dephosphorization sulphur in the hot metal ladle, add-on adds with reference to " H ", the electric furnace molten iron is poured, refund after the slag hitting and detect composition again after electric furnace is warming up to 1300～1350 ℃, as meet IV or V product basis content requirement, then continue next step, as do not meet, will add the agent of dephosphorization sulphur in the hot metal ladle again, take off vanadium-titanium-chromium phosphorus sulphur agent add-on and add with reference to " H ", the electric furnace molten iron is poured, detect composition according to molten iron, by that analogy, until IV that meets the production needs or V product basis content requirement;
4, the molten iron after the processing is gone into middle frequency furnace, intensification is beaten slag totally in 1450～1520 ℃ of temperature ranges, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas after the slag hitting, argon flow amount is 40L/Min, adds alloy furnishing product I V, the required corresponding composition of V;
5, molten iron goes out the electric furnace ingot bar or enters the casting link.
Technical scheme four:
The present invention includes melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, add " vanadium slag " at middle frequency furnace, " vanadium slag " oxygen level obtains numerical value through chemical examination, adds " vanadium slag ", add-on adds with reference to " E ", pours the desiliconization of hot metal titanium and increases vanadium, for production IV, V product are done pre-treatment, be warming up to 1300～1350 ℃ after the slag hitting, detect hot metal composition;
3, shaking ladle or rotary drum stove are handled: detect composition according to molten iron, add the agent of dephosphorization sulphur in shaking ladle or the rotary drum stove, add-on adds with reference to " H ", the electric furnace molten iron is poured, shaking ladle shakes or the rotary drum stove rotates, detect hot metal composition after the slag hitting, as meet IV or V product basis content requirement, then continue next step, as do not meet, detecting composition according to molten iron again will add the agent of dephosphorization sulphur in shaking ladle or the rotary drum stove, add-on adds with reference to " H ", continue to start that shaking ladle shakes or the rotary drum stove rotates slag hitting and detects hot metal composition, by that analogy, until IV that meets production needs or the basic content requirement of V product
4, the molten iron after the processing is gone into middle frequency furnace, intensification is beaten slag totally in 1450～1520 ℃ of temperature ranges, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas after the slag hitting, argon flow amount is 40L/Min, and alloy adds furnishing product I V, the required corresponding composition of V;
5, to go out electric furnace casting fast or enter the casting link for molten iron.
The treatment agent that the present invention relates to:
(1) desiliconization titanium agent:
The agent of desiliconization titanium uses roll scale (to suppose that iron in the roll scale is fully by Fe
2O
3Form with FeO), its main component is FeO, for ease of charge calculation in the production process with all the other Fe
2O
3Also by 1 mole of Fe
2O
3Be considered as 3 moles of FeO, thereby obtain:
The ton roll scale is amounted to iron protoxide kilogram content, (with English " I " expression)=10*{ iron protoxide chemical examination content+, (the chemical examination content of iron-iron protoxide chemical examination content * 56 ÷ 72) *, (160 ÷ 112) *, (216 ÷ 160) }=10* iron protoxide chemical examination content+10*, chemical examination content-5* iron protoxide chemical examination the content of the chemical examination content-15* iron protoxide chemical examination content=19.29* iron of (the chemical examination content of iron-0.78* iron protoxide chemical examination content) * 1.929=10* iron protoxide chemical examination content+19.29* iron.
Annotate: content refers to the numerator value in the percentage ratio in the formula.
Desiliconization titanium process is owing to have the randomness of reaction, and also there is the oxidation slagging in various degree in other element, so we have also taken into account other element when calculating the roll scale add-on.
The ferrous adding kilogram of ton desiliconization of hot metal titanium agent pure zirconia amount (with English " J " expression)=(1+20% peroxide degree) * { (144 ÷ 28) * silicone content * 10+ (144 ÷ 48) * titanium content * 10+ (180 ÷ 51) * content of vanadium * 10+ (72 ÷ 55) * manganese content * 10+1.5*72 ÷ 52* chromium content * 10}=12*{5.14* silicone content+2.48* titanium content+3.53* content of vanadium+1.31* manganese content+2.08* chromium content }
Ton iron desiliconization titanium agent roll scale adds kilogram amount (with English " A " the expression)=ferrous adding kilogram of ton desiliconization of hot metal titanium agent pure zirconia amount ÷ ton roll scale and amounts to iron protoxide kilogram content A=J ÷ I ‰
Annotate: content refers to the numerator value in the percentage ratio in the formula.
(2) take off the agent of vanadium-titanium-chromium phosphorus sulphur:
Set dephosphorization basicity 3.0.
Carbonate content in carbonate content=109.91* molten iron silicon content ÷ soda ash in ton molten iron soda ash adding kilogram amount (representing)=3.0*10* molten iron silicon content * 60 ÷ 28*106 ÷ 62 ÷ soda ash with English " B ".
Set peroxide degree 100%.
Handle ton molten iron roll scale and add kilogram amount (with English " C " expression)=20* (5.14* silicone content+2.48* titanium content+3.53* content of vanadium+1.31* manganese content+2.08* chromium content+5.81* phosphorus content) ÷ I ‰
Annotate: content refers to the numerator value in the percentage ratio in the formula.
The ton molten iron takes off the agent of vanadium-titanium-chromium phosphorus sulphur and adds kilogram amount (using English " D " expression)=ferrous adding kilogram of ton molten iron oxidation amount+ton molten iron soda ash adding kilogram amount D=B+C
Annotate: content refers to the numerator value in the percentage ratio in the formula.
(3) vanadium slag:
Ton molten iron vanadium slag add-on (with English " E " expression)=A*16 ÷ 72 ÷ vanadium slag oxygen levels
Annotate: content refers to the numerator value in the percentage ratio in the formula.
(4) dephosphorization sulphur agent:
Set dephosphorization basicity 3.0.
Carbonate content in carbonate content=109.91* molten iron silicon content ÷ soda ash in ton molten iron soda ash adding kilogram amount (representing)=3.0*10* molten iron silicon content * 60 ÷ 28*106 ÷ 62 ÷ soda ash with English " F ".Annotate: if silicon＜0.12% calculates by 0.12% in the molten iron.
Set peroxide degree 100%.
Ton molten iron roll scale adds kilogram amount (with English " G " expression)=20* (5.14* silicone content+2.48* titanium content) ÷ I% and annotates: if silicon, titanium＜0.1% all calculate by 0.1% in the molten iron.
Annotate: content refers to the numerator value in the percentage ratio in the formula.
The agent of ton dephosphorization of molten iron sulphur adds kilogram amount (with English " H " the expression)=ferrous adding kilogram of ton molten iron oxidation amount+ton molten iron soda ash and adds kilogram amount H=F+G
Annotate: content refers to the numerator value in the percentage ratio in the formula.
Compared with prior art, the invention solves the technology that domestic manufacturer can't produce multiple special purpose cast iron with a set of equipment, the present invention utilizes that electric furnace can heat up, the characteristics that purify are stirred in insulation, induction stirring, argon bottom-blowing, can use the blast furnace hot metal containing low silicon to go into the electric furnace primary treatment, make pig iron purification, purification reach the product composition that meets special service requirements through the different treatment method again.The invention provides complete, seriation, with strong points production technique, have energy-saving and environmental protection,, meet national industry development spirit fully, compare with converter process than the characteristics of converter process product yield height, waste ' s reclamation:
1, add less by the constant gradation of total amount, response intensity is controlled easily; 2, do not exist the illiquidity problem, can use carburelant carburetting at any time; 3, no converter oxygen impacts, and dust is few, and environmental influence is little; 4, make hot metal composition can be easy to control to aim parameter by reasonable temperature increase reaction times, raising extraction agent add-on.
Embodiment:
The present invention purchases low-phosphorous low sulfur coke P＜0.12%S＜0.6%, the low-phosphorous iron powder Tfe of the high chromium of high vanadium 〉=63% V by the control of pig iron purchasing of raw materials quality standard
20
50.9～1.0% Cr
2O2.0～4.0%
3P＜0.15%, use these raw material production to go out typical vanadium-titanium-iron-water, its composition is C 〉=3.4%Si0.2～0.3% Mn0.1～0.2% P0.03～0.1% S, 0.02～0.04% Ti, 0.2～0.3%V, 0.3～0.5% Cr 0.3～0.5% by weight ratio, handle through electric furnace primary treatment and relevant other and all can obtain special purpose cast iron and carry out ingot bar or direct casting again, used electric furnace is a porous plug argon gas bottom blowing electric furnace, is 40L/Min to the argon amount.
One, " ultra-purity pig iron " composition requirement of using the pig iron and wind-power electricity generation low temperature to use with the pig iron, common A type graphite gray iron casting at glass mold D type dag iron casting, adopt following technical scheme:
Technical scheme one,
The present invention includes melting molten iron, purification, adjustment composition, cast molding, be specially:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, pour molten iron after the agent of adding desiliconization titanium in middle frequency furnace and carry out desiliconization, desiliconization titanium agent add-on adds with reference to " A ", and the slag of getting is to call " vanadium slag " in the following text, and molten iron is warming up to 1400～1450 ℃ after the slag hitting, detects hot metal composition;
3, hot metal ladle is handled: detect composition according to molten iron, in hot metal ladle, add and take off the agent of vanadium-titanium-chromium phosphorus sulphur, taking off vanadium-titanium-chromium phosphorus sulphur agent add-on adds with reference to " D ", the electric furnace molten iron is poured, refund electric furnace after the slag hitting and be warming up to 1400～1450 ℃, detect composition, as undesirable, detect composition according to molten iron, take off the agent of vanadium-titanium-chromium phosphorus sulphur with adding in the hot metal ladle again, take off vanadium-titanium-chromium phosphorus sulphur agent add-on and add, the electric furnace molten iron is poured with reference to " D ", by that analogy, until the requirement of the I that meets the production needs (or II or III) product mass of foundation;
4, the molten iron after the processing is gone into middle frequency furnace, be warming up to 1450～1520 ℃ temperature, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ after beating slag totally and carry out deoxidation, after slag hitting, feed ten minutes argon gas, argon flow amount is 40L/Min, alloy adds furnishing product I I, the required corresponding composition of III, and the production product I need be blended into an amount of base iron and add the required corresponding composition of furnishing product I through alloy again;
5, to go out electric furnace casting fast or enter the casting link for molten iron.
Technical scheme two:
The present invention includes melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, pour desiliconization of hot metal after middle frequency furnace adds the agent of desiliconization titanium, add-on adds with reference to " A ", does pre-treatment for production I, II, III product, and the slag of getting is to call " vanadium slag " in the following text, and molten iron is warming up to 1400～1450 ℃ after the slag hitting, detects hot metal composition;
3, shaking ladle or rotary drum stove are handled: add in shaking ladle or the rotary drum stove and take off the agent of vanadium-titanium-chromium phosphorus sulphur, taking off vanadium-titanium-chromium phosphorus sulphur agent add-on adds with reference to " D ", the electric furnace molten iron is poured, detect composition according to molten iron, shaking ladle shakes or the rotary drum stove rotates, detect hot metal composition after the slag hitting, as undesirable, detect composition according to molten iron again and take off the agent of vanadium-titanium-chromium phosphorus sulphur adding in shaking ladle or the rotary drum stove, add-on adds with reference to " D ", continues to start that shaking ladle shakes or the rotary drum stove rotates, and slag hitting detects hot metal composition, by that analogy, until the requirement of the I that meets the production needs (or II or III) product mass of foundation;
4, the molten iron after the processing is gone into middle frequency furnace, be warming up to 1450～1520 ℃ of temperature with slag beat clean after, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas once more after the slag hitting, argon flow amount is 40L/Min, alloy adds furnishing product I I, the required corresponding composition of III, and the production product I need be blended into an amount of base iron and add the required corresponding composition of furnishing product I through alloy again;
5, to go out electric furnace casting fast or enter the casting link for molten iron.
Two, hang down phosphorus and sulphur pig iron composition requirement with high vanadium ultralow phosphorus titanium sulphur pig iron and slag stock pump class wearing piece with the high titanium of high vanadium at high-ni-cr roll, adopt following technical scheme:
Technical scheme one:
The present invention includes melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, add " vanadium slag " in middle frequency furnace, " vanadium slag " oxygen level obtains numerical value through chemical examination, pours the desiliconization of hot metal titanium after the adding " vanadium slag " and increases vanadium, add-on adds with reference to " E ", do pre-treatment for production IV, V product, be warming up to 1300～1350 ℃ after the slag hitting, detect hot metal composition;
3, hot metal ladle is handled: detect composition according to molten iron, add the agent of dephosphorization sulphur in the hot metal ladle, dephosphorization sulphur agent add-on adds with reference to " H ", and the electric furnace molten iron is poured, and refunds after the slag hitting and detects composition again after electric furnace is warming up to 1300～1350 ℃, the agent of dephosphorization sulphur will be added again in the hot metal ladle, the electric furnace molten iron is poured, detect composition, take off vanadium-titanium-chromium phosphorus sulphur agent add-on and add with reference to " H " according to molten iron, by that analogy, until IV that meets the production needs or the requirement of V quality product;
4, the molten iron after the processing is gone into middle frequency furnace, intensification is beaten slag totally in 1450～1520 ℃ of temperature ranges, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas after the slag hitting, argon flow amount is 40L/Min, and alloy adds furnishing product I V, the required corresponding composition of V;
5, to go out electric furnace casting fast or enter the casting link for molten iron.
Technical scheme two:
The present invention includes melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
1, melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
2, add " vanadium slag " at middle frequency furnace, " vanadium slag " oxygen level obtains numerical value through chemical examination, pours the desiliconization of hot metal titanium after the adding " vanadium slag " and increases vanadium, for production IV, V product are done pre-treatment, add-on adds with reference to " E ", is warming up to 1300～1350 ℃ after the back slag hitting, detects hot metal composition;
3, shaking ladle or rotary drum stove are handled: detect composition according to molten iron, add the agent of dephosphorization sulphur in shaking ladle or the rotary drum stove, dephosphorization sulphur agent add-on adds with reference to " H ", the electric furnace molten iron is poured, shaking ladle shakes or the rotary drum stove rotates, detect hot metal composition after the slag hitting, detect composition according to molten iron again and will add the agent of dephosphorization sulphur in shaking ladle or the rotary drum stove, add-on adds with reference to " H ", continue to start that shaking ladle shakes or the rotary drum stove rotates slag hitting and detects hot metal composition, by that analogy, until IV that meets the production needs or the requirement of V quality product
4, the molten iron after the processing is gone into middle frequency furnace, intensification is beaten slag totally in 1450～1520 ℃ of temperature ranges, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas after the slag hitting, argon flow amount is 40L/Min, and alloy adds furnishing product I V, the required corresponding composition of V;
5, to go out electric furnace casting fast or enter the casting link for molten iron.
Claims (4)
1, a kind of blast furnace and electric furnace duplex weak oxidation method is produced the production technique of special purpose cast iron, comprises melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
(1) melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
(2) pour molten iron after the agent of adding desiliconization titanium in middle frequency furnace and carry out desiliconization, desiliconization titanium agent add-on adds with reference to " A ", and the slag of getting is to call " vanadium slag " in the following text, and molten iron is warming up to 1400～1450 ℃ after the slag hitting, detects hot metal composition;
(3) hot metal ladle is handled: detect composition according to molten iron, in hot metal ladle, add and take off the agent of vanadium-titanium-chromium phosphorus sulphur, take off the agent of vanadium-titanium-chromium phosphorus sulphur, add-on adds with reference to " D ", the electric furnace molten iron is poured, refund electric furnace after the slag hitting and be warming up to 1400～1450 ℃, detect composition, detect composition according to molten iron, as meet I or II or III product basis content requirement, then continue next step, as do not meet, take off the agent of vanadium-titanium-chromium phosphorus sulphur with adding in the hot metal ladle again, add-on adds with reference to " D ", the electric furnace molten iron is poured, by that analogy, meet I or the II or the III product basis content requirement of production needs until component content;
(4) molten iron after the processing is gone into middle frequency furnace, be warming up to 1450～1520 ℃ temperature, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ after beating slag totally and carry out deoxidation, after slag hitting, feed ten minutes argon gas, argon flow amount is 40L/Min, add alloy furnishing product I I, the required corresponding composition of III, the production product I need be blended into an amount of base iron again through adding the required corresponding composition of alloy furnishing product I;
(5) to go out electric furnace casting fast or enter the casting link for molten iron.
2, a kind of blast furnace and electric furnace duplex weak oxidation method is produced the production technique of special purpose cast iron, comprises melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
(1) melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
(2) pour desiliconization of hot metal after middle frequency furnace adds the agent of desiliconization titanium, add-on adds with reference to " A ", does pre-treatment for production I, II, III product, and the slag of getting is to call " vanadium slag " in the following text, and molten iron is warming up to 1400～1450 ℃ after the slag hitting, detects hot metal composition;
(3) shaking ladle or rotary drum stove are handled: add in shaking ladle or the rotary drum stove and take off the agent of vanadium-titanium-chromium phosphorus sulphur, add-on adds with reference to " D ", the electric furnace molten iron is poured, detect composition according to molten iron, shaking ladle shakes or the rotary drum stove rotates, detect hot metal composition after the slag hitting, as meet I or II or III product basis content requirement, then continue next step, as do not meet, detect composition according to molten iron again and take off the agent of vanadium-titanium-chromium phosphorus sulphur adding in shaking ladle or the rotary drum stove, add-on adds with reference to " D ", continues to start that shaking ladle shakes or the rotary drum stove rotates, and slag hitting detects hot metal composition, by that analogy, contain requirement until the I that meets the production needs or II or III product basis matter;
(4) molten iron after the processing is gone into middle frequency furnace, be warming up to 1450～1520 ℃ of temperature with slag beat clean after, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas once more after the slag hitting, argon flow amount is 40L/Min, alloy adds furnishing product I I, the required corresponding composition of III, and the production product I need be blended into an amount of base iron and add the required corresponding composition of furnishing product I through alloy again;
(5) to go out electric furnace casting fast or enter the casting link for molten iron.
3, a kind of blast furnace and electric furnace duplex weak oxidation method is produced the production technique of special purpose cast iron, comprises melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
(1) melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
(2) add " vanadium slag " in middle frequency furnace, " vanadium slag " oxygen level obtains numerical value through chemical examination, adds " vanadium slag ", add-on adds with reference to " E ", pours the desiliconization of hot metal titanium and increases vanadium, for production IV, V product are done pre-treatment, be warming up to 1300～1350 ℃ after the slag hitting, detect hot metal composition;
(3) hot metal ladle is handled: detect composition according to molten iron, add the agent of dephosphorization sulphur in the hot metal ladle, add-on adds with reference to " H ", the electric furnace molten iron is poured, refund after the slag hitting and detect composition again after electric furnace is warming up to 1300～1350 ℃, as meet IV or V product basis content requirement, then continue next step, as do not meet, will add the agent of dephosphorization sulphur in the hot metal ladle again, take off vanadium-titanium-chromium phosphorus sulphur agent add-on and add with reference to " H ", the electric furnace molten iron is poured, detect composition according to molten iron, by that analogy, until IV that meets the production needs or V product basis content requirement;
(4) molten iron after the processing is gone into middle frequency furnace, intensification is beaten slag totally in 1450～1520 ℃ of temperature ranges, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas after the slag hitting, argon flow amount is 40L/Min, adds alloy furnishing product I V, the required corresponding composition of V;
(5) molten iron goes out the electric furnace ingot bar or enters the casting link.
4, a kind of blast furnace and electric furnace duplex weak oxidation method is produced the production technique of special purpose cast iron, comprises melting molten iron, purification, adjustment composition, cast molding, it is characterized in that:
(1) melting is blast-melted: vanadium-titanium-iron-water composition C 〉=3.4% Si0.2～0.3%Mn0.1～0.2% P0.03 by weight ratio～0.1% S, 0.02～0.04% Ti, 0.2～0.3% V, 0.3～0.5%Cr 0.3～0.5%;
(2) add " vanadium slag " at middle frequency furnace, " vanadium slag " oxygen level obtains numerical value through chemical examination, adds " vanadium slag ", add-on adds with reference to " E ", pours the desiliconization of hot metal titanium and increases vanadium, for production IV, V product are done pre-treatment, be warming up to 1300～1350 ℃ after the slag hitting, detect hot metal composition;
(3) shaking ladle or rotary drum stove are handled: detect composition according to molten iron, add the agent of dephosphorization sulphur in shaking ladle or the rotary drum stove, add-on adds with reference to " H ", the electric furnace molten iron is poured, shaking ladle shakes or the rotary drum stove rotates, detect hot metal composition after the slag hitting, as meet IV or V product basis content requirement, then continue next step, as do not meet, detecting composition according to molten iron again will add the agent of dephosphorization sulphur in shaking ladle or the rotary drum stove, add-on adds with reference to " H ", continue to start that shaking ladle shakes or the rotary drum stove rotates slag hitting and detects hot metal composition, by that analogy, until IV that meets production needs or the basic content requirement of V product;
(4) molten iron after the processing is gone into middle frequency furnace, intensification is beaten slag totally in 1450～1520 ℃ of temperature ranges, insert 0.5 kilogram of/ton molten iron of Mg7Re1 cored-wire when being warming up to 1520 ℃ and carry out deoxidation, feed ten minutes argon gas after the slag hitting, argon flow amount is 40L/Min, adds alloy furnishing product I V, the required corresponding composition of V;
(5) to go out electric furnace casting fast or enter the casting link for molten iron.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373364A (en) * | 2010-11-20 | 2012-03-14 | 甘肃酒钢集团西部重工股份有限公司 | Wind-power equipment casting and manufacturing method thereof |
| CN103173677A (en) * | 2013-03-04 | 2013-06-26 | 西华大学 | Hypoeutectic energy-saving vanadium and titanium containing cast pig iron with low silicon-carbon ratio |
| CN103952517A (en) * | 2014-04-24 | 2014-07-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Treatment method for water containing vanadium, chromium and iron and smelting process for high chromium vanadium titanium magnetite concentrate |
| CN103966382A (en) * | 2014-04-24 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for treating vanadium containing molten iron and method for smelting vanadium-titanium magnetite concentrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1044300A (en) * | 1989-01-19 | 1990-08-01 | 赵华龙 | Use smelting pig iron with steel filings for nodular cast iron |
| CN1059370A (en) * | 1990-08-31 | 1992-03-11 | 黄石市无机盐厂 | Chromium residue detoxifying, smelting contain the method for chromium pig iron |
| CN1769500A (en) * | 2004-11-05 | 2006-05-10 | 刘光火 | Niccochromite smelting process for producing nickel chromium pig iron |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373364A (en) * | 2010-11-20 | 2012-03-14 | 甘肃酒钢集团西部重工股份有限公司 | Wind-power equipment casting and manufacturing method thereof |
| CN102373364B (en) * | 2010-11-20 | 2013-04-24 | 甘肃酒钢集团西部重工股份有限公司 | Wind-power equipment casting and manufacturing method thereof |
| CN103173677A (en) * | 2013-03-04 | 2013-06-26 | 西华大学 | Hypoeutectic energy-saving vanadium and titanium containing cast pig iron with low silicon-carbon ratio |
| CN103952517A (en) * | 2014-04-24 | 2014-07-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Treatment method for water containing vanadium, chromium and iron and smelting process for high chromium vanadium titanium magnetite concentrate |
| CN103966382A (en) * | 2014-04-24 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for treating vanadium containing molten iron and method for smelting vanadium-titanium magnetite concentrate |
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Application publication date: 20090812 Assignee: Turpan Shenda Metallurgical Casting Technology Co. Ltd. Assignor: Yan Xiaofeng Contract record no.: 2016650000014 Denomination of invention: Production process for producing special purpose cast iron by blast furnace and electric furnace duplex weak oxidation process Granted publication date: 20120704 License type: Common License Record date: 20160906 |
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