CN103667588A - Electric converter steelmaking process - Google Patents
Electric converter steelmaking process Download PDFInfo
- Publication number
- CN103667588A CN103667588A CN201310399572.7A CN201310399572A CN103667588A CN 103667588 A CN103667588 A CN 103667588A CN 201310399572 A CN201310399572 A CN 201310399572A CN 103667588 A CN103667588 A CN 103667588A
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- oxygen
- furnace
- electric current
- electric
- steel
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- Granted
Links
- 238000009628 steelmaking Methods 0.000 title claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 57
- 239000001301 oxygen Substances 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000003723 Smelting Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000010891 electric arc Methods 0.000 claims abstract description 8
- 238000010079 rubber tapping Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 28
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 12
- 239000004571 lime Substances 0.000 claims description 12
- 238000005272 metallurgy Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 229910000805 Pig iron Inorganic materials 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000007858 starting material Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 241001062009 Indigofera Species 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 238000005261 decarburization Methods 0.000 claims description 4
- 230000003628 erosive effect Effects 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 238000005242 forging Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 239000003818 cinder Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-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
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses an electric converter steelmaking process and belongs to the technical field of electric steelmaking. According to the process, a novel oxygen lance is replaced at an electric furnace slag opening of an electric-arc furnace, the oxygen blowing intensity is improved, the oxygen blowing amount is increased, blast furnace molten iron replaces partial steel scraps and serves as a main steelmaking raw material, huge investment of equipment can be avoided, electric energy needed by cold metal temperature rise melting can be saved, the production efficiency is improved, and the production cost is saved. The specific smelting process comprises the following steps: A, preparing the equipment and raw materials; B, performing primary feeding; C, performing power transmission, raising the temperature, blowing oxygen and fluxing; D, performing secondary feeding; E, continuously performing power transmission and blowing oxygen, so that the temperature of the furnace charge is raised, and the furnace charge is melted; F, feeding for the third time; G, electrifying and raising the temperature, so that the furnace charge is melted; and H, tapping slag, measuring the temperature and sampling.
Description
Technical field
The invention belongs to Electric Furnace Steelmaking field.
Background technology
Electric arc furnace is one of visual plant of short flow process steel-making, and it usings electric energy as main energy sources, uses the cold burdens such as steel scrap and the pig iron to smelt, and raw material and production phase are selected comparatively flexibly, initiatively; And existing market situation is that steel scrap price is surging and molten iron is relatively cheap, use that scrap smelting power consumption is higher, efficiency is low, production cost is high.Converter is the major equipment of long flow process steel-making, and its main steelmaking feed is blast-melted, and oxygen blast is smelted and without external energy; But its production capacity is larger, raw material consumption and output of yield are very huge, and must be consecutive productions, need the equipment such as coking, sintering, blast furnace, refining and continuous casting and rolling to match, and facility investment is larger, and general enterprises is unable to be born.The furnace charge of above-mentioned two kinds of process for making select and smelting mode single.
Summary of the invention
The object of this invention is to provide a kind of electric converter steelmaking process, to solve, prior art electric arc furnace use scrap smelting power consumption is higher, efficiency is low; Converter must be consecutive production, needs the equipment such as coking, sintering, blast furnace, refining and continuous casting and rolling to match, and facility investment is larger, the problem such as the furnace charge of above-mentioned two kinds of process for making is selected and smelting mode is single.
The technical solution adopted for the present invention to solve the technical problems is to change new-type oxygen rifle at the electric furnace cinder notch of electric arc furnace, improve oxygen blast intensity, strengthen blowing oxygen quantity, utilize blast-melted replacement part steel scrap as main steelmaking feed, both can avoid equipment huge investment, can save again the required electric energy of cold burden intensification fusing, enhance productivity, save production cost.Concrete smelting technology is as follows:
A. equipment and starting material preparatory stage: after a upper stove electrosmelting finishes, tapped, stifled tap hole, add drainage sand; Check furnace lining and slag notch erosion condition, while needing fettling, repair in time; Check whether electrode is oxidized seriously, if seriously need, change in time; By smelting lower required heavy burder, steel scrap, steel cuttings, metallurgy lime starting material and the subsidiary material of one heat steel, pack material indigo plant into, and in advance molten iron is got ready, stand-by.
B. once reinforced: adding 5t to 8t heavy burder, described heavy burder is forging crop, useless forging, steel scrap ingot etc.; 10t is to 15t thin material, and described thin material is steel scrap, chrome molybdenum material; 2t is to the slag material of 3t, and affiliated slag material is metallurgy lime; Then be blended into blast-melted to 30t of 0t.
C. feeding temperature-raising, oxygen blast are fluxed: with little electric current 6KA, to 10KA, power transmission opens arc, strengthen electric current (10KA is to 20KA) after arc stability, with higher-wattage intensification melting batch.Adopt new-type oxygen rifle side oxygen decarburization, saves energy, the burn-off rate that improves.Oxygen pressure: 0.4 MPa – 1.0 MPa, oxygen flow: 1000 Nm
3/ h-1500Nm
3/ h.
D. secondary charging: after energising intensification 30-60min, add about 5t to 15t thin material, steel cuttings, the pig iron.
E. continue power transmission oxygen blast, furnace charge is heated up and melt; First with little electric current power transmission, open arc, after arc stability, strengthen electric current and improve oxygen blast intensity; Electric current is that 10-20KA, oxygen pressure are that 0.4 MPa – 1.0 MPa, oxygen flow are 1000 Nm
3/ h-1500Nm
3/ h.
F. feed in raw material for three times: after about 20-60min energising heats up, add 4t to 12t thin material, steel cuttings, pig iron starting material; And add 1t-3t metallurgy lime and partial oxidation iron.
G. energising heats up and makes furnace charge fusing.After arc stability, with large electric current power transmission, make furnace charge rapid melting, electric current is 20KA – 30KA.Furnace charge dissolves the certain blowing oxygen quantity of rear maintenance, and making the most of oxidation of coal in molten steel is gas, gas stirring make molten steel temperature and composition even, impel inclusion floating.Oxygen pressure: 1.0 MPa-1.4 MPa, oxygen flow: 1500 Nm
3/ h-1700Nm
3/ h.
H. slagging, thermometric, sampling.After slagging, carry out thermometric and sampling analysis chemical composition, until temperature, reach 1570-1650 ℃ and all meet when tapping requires and tap with composition.
Adopt positively effect of the present invention to be: make furnace charge select variation, the variation of smelting mode, has saved electric energy, has accelerated burn-off rate, has improved production efficiency, has saved production cost.Can estimate, use 40% left and right blast-melted during as raw materials for production, can saves energy 60-100kwh/t steel, smelting cycle can shorten approximately 20%, and 200-500 unit/t steel saves production cost.Like this, not dropping under the condition of new installation, not only improve output, and saved cost, obtained considerable economic benefit.And when hot metal supply anxiety or price increase, can with cold burden, smelt completely, neither affecting production task, can save production cost again.
Embodiment
The high iron furnace water that adds different ratios of take is example.
Embodiment 1
While smelting with cold burden completely, concrete smelting technology is as follows:
A. equipment and starting material preparatory stage: after a upper stove electrosmelting finishes, tapped, stifled tap hole, add drainage sand; Check furnace lining and slag notch erosion condition, while needing fettling, repair in time; Check whether electrode is oxidized seriously, if seriously need, change in time; By smelting lower required heavy burder, steel scrap, steel cuttings, metallurgy lime starting material and the subsidiary material of one heat steel, pack material indigo plant into, and in advance molten iron is got ready, stand-by.
B. once reinforced: in electric arc furnace, to add 7t heavy burder, 16t thin material steel scrap, 2t metallurgy lime and the 15t pig iron.
C. feeding temperature-raising, oxygen blast are fluxed: with little electric current 8KA, open arc (electric arc), after arc stability, strengthening electric current is 20KA.With higher-wattage intensification melting batch.Adopt new-type oxygen rifle side oxygen decarburization, saves energy, the burn-off rate that improves.Oxygen pressure: 0.6MPa, oxygen flow: 1300Nm
3/ h.
D. secondary charging: power transmission, after 1 hour, adds the 5t pig iron and 6t thin material.
E. continue power transmission, furnace charge is heated up and melt, oxygen blast removes carbon and oxidizable impurity wherein.Electric current is that 20KA, oxygen pressure are that 0.7MPa, oxygen flow are 1200 Nm
3/ h.
F. feed in raw material for three times: again, after the about 30min of feeding temperature-raising, add the 4t pig iron, 3t thin material, 2t metallurgy lime and 1t ferric oxide.
G. with maximum current, be rapidly heated furnace charge is dissolved, and keep certain blowing oxygen quantity, making the most of oxidation of coal in molten steel is gas, gas stirring make molten steel temperature and composition even, impel inclusion floating.Oxygen pressure: 1.0 MPa, oxygen flow: 1500 Nm3/h, electric current is 30KA.
H. slagging, thermometric, sampling.Furnace charge dissolves rear slagging completely, and carries out thermometric and sampling analysis chemical composition, tapping when temperature reaches 1620 ℃ and composition and all meets tapping and require.
Embodiment 2
Be blended into approximately 40% when blast-melted, concrete smelting technology is as follows:
A., after going up a stove electrosmelting and finishing, tapped, stifled tap hole, add drainage sand; Check furnace lining and slag notch erosion condition, while needing fettling, repair in time; Check whether electrode is oxidized seriously, if seriously need, change in time; By smelting lower required heavy burder, steel scrap, steel cuttings, metallurgy lime starting material and the subsidiary material of one heat steel, pack material indigo plant into, and in advance molten iron is got ready, stand-by.
B. once reinforced: to add 6t heavy burder, 12t thin material steel cuttings, 1.5t metallurgy lime and the 22t pig iron.
C. feeding temperature-raising, oxygen blast are fluxed: with little electric current 8KA, open arc (electric arc), after arc stability, strengthening electric current is 18KA.Use oxygen gun blowing decarburization, saves energy, the burn-off rate that improves simultaneously.Oxygen pressure: 0.9 MPa, oxygen flow: 1400Nm
3/ h.
D. secondary charging: power transmission, after approximately 40 minutes, adds 8t thin material and the 3t pig iron.
E. continue power transmission, furnace charge is heated up and melt, oxygen blast removes carbon and oxidizable impurity wherein.Electric current is that 20KA, oxygen pressure are that 1.0MPa, oxygen flow are 1500 Nm
3/ h.
F. feed in raw material for three times: again, after the about 30min of feeding temperature-raising, add 4t thin material, the 2t pig iron, 2t metallurgy lime and 1t ferric oxide.
G. with maximum current, be rapidly heated furnace charge is dissolved, and keep certain blowing oxygen quantity, making the most of oxidation of coal in molten steel is gas, gas stirring make molten steel temperature and composition even, impel inclusion floating.Oxygen pressure: 1.2 MPa, oxygen flow: 1600 Nm
3/ h, electric current is 30KA.
Slagging, thermometric, sampling.Furnace charge dissolves rear slagging completely, and carries out thermometric and sampling analysis chemical composition, tapping when temperature reaches 1650 ℃ and composition and all meets tapping and require.
Claims (1)
1. at the electric furnace cinder notch of electric arc furnace, change new-type oxygen rifle, improve oxygen blast intensity, strengthen blowing oxygen quantity, utilize blast-melted replacement part steel scrap as main steelmaking feed, both can avoid equipment huge investment, can save again the required electric energy of cold burden intensification fusing, enhance productivity, save production cost; Concrete smelting technology comprises:
A equipment and starting material preparatory stage: after a upper stove electrosmelting finishes, tapped, block up tap hole, add drainage sand; Check furnace lining and slag notch erosion condition, while needing fettling, repair in time; Check whether electrode is oxidized seriously, if seriously need, change in time; By smelting lower required heavy burder, steel scrap, steel cuttings, metallurgy lime starting material and the subsidiary material of one heat steel, pack material indigo plant into, and in advance molten iron is got ready, stand-by;
B is once reinforced: adding 5t to 8t heavy burder, described heavy burder is forging crop, useless forging, steel scrap ingot etc.; 10t is to 15t thin material, and described thin material is steel scrap, chrome molybdenum material; 2t is to the slag material of 3t, and affiliated slag material is metallurgy lime; Then be blended into blast-melted to 30t of 0t;
C feeding temperature-raising, oxygen blast are fluxed: with little electric current 6KA, to 10KA, power transmission opens arc, strengthen electric current (10KA is to 20KA) after arc stability, with higher-wattage intensification melting batch;
Adopt new-type oxygen rifle side oxygen decarburization, saves energy, the burn-off rate that improves;
Oxygen pressure: 0.4 MPa – 1.0 MPa, oxygen flow: 1000 Nm
3/ h-1500Nm
3/ h;
D secondary charging: after energising intensification 30-60min, add about 5t to 15t thin material, steel cuttings, the pig iron;
E continues power transmission oxygen blast, furnace charge is heated up and melt; First with little electric current power transmission, open arc, after arc stability, strengthen electric current and improve oxygen blast intensity; Electric current is that 10-20KA, oxygen pressure are that 0.4 MPa – 1.0 MPa, oxygen flow are 1000 Nm
3/ h-1500Nm
3/ h;
F feeds in raw material for tri-times: after about 20-60min energising heats up, add 4t to 12t thin material, steel cuttings, pig iron starting material; And add 1t-3t metallurgy lime and partial oxidation iron;
G energising heats up and makes furnace charge fusing: after arc stability, with large electric current power transmission, make furnace charge rapid melting, electric current is 20KA – 30KA; Furnace charge dissolves the certain blowing oxygen quantity of rear maintenance, and making the most of oxidation of coal in molten steel is gas, gas stirring make molten steel temperature and composition even, impel inclusion floating; Oxygen pressure: 1.0 MPa-1.4 MPa, oxygen flow: 1500 Nm
3/ h-1700Nm
3/ h;
H slagging, thermometric, sampling: after slagging, carry out thermometric and sampling analysis chemical composition, until temperature, reach 1570-1650 ℃ and all meet when tapping requires and tap with composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310399572.7A CN103667588B (en) | 2013-09-05 | 2013-09-05 | Electricity converter steelmaking process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310399572.7A CN103667588B (en) | 2013-09-05 | 2013-09-05 | Electricity converter steelmaking process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103667588A true CN103667588A (en) | 2014-03-26 |
| CN103667588B CN103667588B (en) | 2015-08-26 |
Family
ID=50306359
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|---|---|---|---|
| CN201310399572.7A Active CN103667588B (en) | 2013-09-05 | 2013-09-05 | Electricity converter steelmaking process |
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| Country | Link |
|---|---|
| CN (1) | CN103667588B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328243A (en) * | 2014-11-07 | 2015-02-04 | 达力普石油专用管有限公司 | Oxygen electric arc furnace steelmaking method for control of large electricity consumption with proper carbon proportion |
| CN105734198A (en) * | 2016-04-20 | 2016-07-06 | 中天钢铁集团有限公司 | Manufacturing method for smelting phosphorus-containing weathering-resistant steel through EAF-converter |
| CN107779539A (en) * | 2016-08-31 | 2018-03-09 | 河南凤宝特钢有限公司 | A kind of method for reducing steel-making slag charge consumption |
| CN111647716A (en) * | 2020-07-29 | 2020-09-11 | 河南中原特钢装备制造有限公司 | Electric arc furnace steelmaking batching process |
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|---|---|---|---|---|
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| CN1245833A (en) * | 1998-08-25 | 2000-03-01 | 北京科技大学 | Short flow-process electric arc furnace steel plant |
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2013
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| CN1245833A (en) * | 1998-08-25 | 2000-03-01 | 北京科技大学 | Short flow-process electric arc furnace steel plant |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328243A (en) * | 2014-11-07 | 2015-02-04 | 达力普石油专用管有限公司 | Oxygen electric arc furnace steelmaking method for control of large electricity consumption with proper carbon proportion |
| CN104328243B (en) * | 2014-11-07 | 2016-02-17 | 达力普石油专用管有限公司 | Join carbon large power consumption control oxygen electrical furnace steelmaking process in right amount |
| CN105734198A (en) * | 2016-04-20 | 2016-07-06 | 中天钢铁集团有限公司 | Manufacturing method for smelting phosphorus-containing weathering-resistant steel through EAF-converter |
| CN105734198B (en) * | 2016-04-20 | 2018-06-08 | 中天钢铁集团有限公司 | A kind of preparation method of the phosphorous weathering steel of electricity converter smelting |
| CN107779539A (en) * | 2016-08-31 | 2018-03-09 | 河南凤宝特钢有限公司 | A kind of method for reducing steel-making slag charge consumption |
| CN111647716A (en) * | 2020-07-29 | 2020-09-11 | 河南中原特钢装备制造有限公司 | Electric arc furnace steelmaking batching process |
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| Publication number | Publication date |
|---|---|
| CN103667588B (en) | 2015-08-26 |
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Denomination of invention: Electric converter steelmaking process Effective date of registration: 20190227 Granted publication date: 20150826 Pledgee: Yucheng Branch of Agricultural Bank of China Ltd. Pledgor: TONGYU HEAVY INDUSTRY Co.,Ltd. Registration number: 2019990000162 |
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