CN107794434A - Method for increasing carbon, silicon and manganese contents of molten steel of medium-high carbon steel by utilizing molten iron - Google Patents
Method for increasing carbon, silicon and manganese contents of molten steel of medium-high carbon steel by utilizing molten iron Download PDFInfo
- Publication number
- CN107794434A CN107794434A CN201610802952.4A CN201610802952A CN107794434A CN 107794434 A CN107794434 A CN 107794434A CN 201610802952 A CN201610802952 A CN 201610802952A CN 107794434 A CN107794434 A CN 107794434A
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- Prior art keywords
- molten iron
- steel
- molten
- carbon
- iron
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000677 High-carbon steel Inorganic materials 0.000 title claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 10
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 8
- 239000011572 manganese Substances 0.000 title abstract description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title abstract description 4
- 239000010703 silicon Substances 0.000 title abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title abstract 2
- 238000010079 rubber tapping Methods 0.000 claims abstract description 15
- 229910000954 Medium-carbon steel Inorganic materials 0.000 claims abstract description 6
- 229910000720 Silicomanganese Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005275 alloying Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 239000002893 slag Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001325 element alloy Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a method for increasing the carbon, silicon and manganese contents of medium-high carbon steel molten steel by using molten iron, wherein the temperature of the molten iron is selected to be more than 1350 ℃; 4.0-4.5% of C, 0.30-1.0% of Si, less than 0.30% of Mn, less than or equal to 0.070% of P and less than or equal to 0.070% of S in molten iron; carrying out slag skimming operation before the molten iron is used, removing surface residues, exposing the liquid level of the molten iron to more than 90%, and waiting time of the slag skived molten iron before turning over the molten iron is not more than 20 min. Selecting medium and high carbon steel grades with finished steel grade C more than 0.30%, P less than 0.025% and S more than 0.010%, and controlling the difference between the carbon content of the steel and the target upper limit of the steel grade within 0.35%; after tapping of the converter is finished, the molten iron is folded into the molten steel tank to be not more than 10 tons; and the number of times of turning molten iron into the molten steel tank is increased by 5-10 ℃ on the basis of the technological parameter requirements of the tapping temperature and the hanging temperature of the converter. The invention can effectively control the consumption of steel materials in the steelmaking process and reduce the alloying cost of steel grades.
Description
Technical field
It is more particularly to a kind of to utilize molten iron increase medium and high carbon steel molten steel carbon silicomanganese the invention belongs to smelting process technical field
The method of content.
Background technology
Converter smelting molten steel alloying and with carbon process typically using each carburant, contain all kinds of of respective metal element
Alloy is carried out.Liquid steel temperature loses after all kinds of raw material of alloying process addition cause tapping, adds deoxidation in molten steel and produces
Thing, and alloying cost is of a relatively high.
The content of the invention
The present invention provides a kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron, and its purpose is intended to reduce
Steelmaking process iron and steel stock loses, and reduces steel grade alloying cost.
For up to this purpose, this invention takes following technical solution：
A kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron, its specific method are：
(1) molten iron selects：1350 DEG C of molten iron temperature ＞；In hot metal composition：C 4.0~4.5%, Si 0.30~1.0%,
Mn ＜ 0.30%, P≤0.070%, S≤0.070%.
(2) molten iron drossing operation is carried out before qualified molten iron is used, removes hot-metal bottle inner surface residue, molten iron liquid
Face is exposed to more than 90%.
(3) molten iron after control is skimmed is not more than 20min to the stand-by period before iron is turned over.
(4) steel grade finished product C ＞ 0.30%, P ＜ 0.025%, S ＞ 0.010% middle, high-carbon steel grade, in control are selected
High-carbon steel tapping carbon content and the difference of steel grade target upper limit are within 0.35%.
(5) after converter tapping terminates, selected molten iron is hoisted to above ladle, molten iron is folded into and is not more than 10 tons.
(6) carry out folding into the heat of molten iron operation in ladle, Tapping Temperature of Bof, hanging pot temperature are in technological parameter requirement
On the basis of improve 5~10 DEG C.
Beneficial effects of the present invention are：
The present invention can effectively control the steel technology of steelmaking process, reduce steel grade alloying cost, save alloy resource.
Embodiment
Embodiment 1：
1st, a tank molten iron, 1360 DEG C of molten iron temperature, C 4.5%, Si 0.50%, Mn 0.20%, P in molten iron are prepared
0.065%th, S 0.040%.
2nd, operation of skimming is carried out to selected molten iron, molten iron level is exposed to more than 90%.
3rd, molten iron after skimming is to turning over 18 minutes stand-by period before iron
4th, from U75V steel grades, steel grade finished product C 0.78%, P 0.025%, S 0.020%.Smelting tapping C 0.48%,
P 0.016%, S 0.015%.
5th, the alloy carburetting 0.025~0.03% that U75V steel alloyings add, alloy increase silicon, increased in manganese amount and steel grade target
Limit difference 0.05~0.10%.
6th, after converter tapping terminates, selected molten iron is hoisted to above ladle, folds into 5 tons of molten iron.
7th, tapping temperature is controlled in 1660 DEG C, 1595 DEG C of hanging pot temperature.
8th, converter enters LF stoves sampling C 0.73%, Si 0.60%, P 0.022%, S 0.016%, and meeting technology controlling and process will
Ask.
Embodiment 2：
1st, a tank molten iron, 1390 DEG C of molten iron temperature, C 4.0%, Si 0.80%, Mn 0.10%, P in molten iron are prepared
0.055%th, S 0.029%.
2nd, operation of skimming is carried out to selected molten iron, molten iron level is exposed to more than 90%.
3rd, molten iron after skimming is to turning over 10 minutes stand-by period before iron
4th, from 80 steel grades, steel grade finished product C 0.85%, P 0.025%, S 0.025%.Smelt tapping C 0.35%, P
0.018%th, S 0.015%.
5th, the alloy carburetting 0.015~0.025% that 80 steel alloyings add, alloy increase silicon, increased in manganese amount and steel grade target
Limit difference 0.10~0.20%.
6th, after converter tapping terminates, selected molten iron is hoisted to above ladle, folds into 10 tons of molten iron.
7th, tapping temperature is controlled in 1655 DEG C, 1595 DEG C of hanging pot temperature.
8th, converter enters LF stoves sampling C 0.78%, Si 0.25%, P 0.023%, S 0.018%, and meeting technology controlling and process will
Ask.
Claims (1)
- A kind of 1. method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron, it is characterised in that：(1) molten iron selects：1350 DEG C of molten iron temperature ＞；In hot metal composition：C 4.0~4.5%, Si 0.30~1.0%, Mn ＜ 0.30%, P≤0.070%, S≤0.070%；(2) molten iron drossing operation is carried out before qualified molten iron is used, removes hot-metal bottle inner surface residue, molten iron level is naked Reveal to more than 90%；(3) molten iron after control is skimmed is not more than 20min to the stand-by period before iron is turned over；(4) steel grade finished product C ＞ 0.30% are selected, P ＜ 0.025%, S ＞ 0.010% middle, high-carbon steel grade, control medium high carbon Steel tapping carbon content and the difference of steel grade target upper limit are within 0.35%；(5) after converter tapping terminates, selected molten iron is hoisted to above ladle, molten iron is folded into and is not more than 10 tons；(6) carry out folding into the heat of molten iron operation, the base that Tapping Temperature of Bof, hanging pot temperature require in technological parameter in ladle 5~10 DEG C are improved on plinth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802952.4A CN107794434A (en) | 2016-09-06 | 2016-09-06 | Method for increasing carbon, silicon and manganese contents of molten steel of medium-high carbon steel by utilizing molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802952.4A CN107794434A (en) | 2016-09-06 | 2016-09-06 | Method for increasing carbon, silicon and manganese contents of molten steel of medium-high carbon steel by utilizing molten iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107794434A true CN107794434A (en) | 2018-03-13 |
Family
ID=61529836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610802952.4A Pending CN107794434A (en) | 2016-09-06 | 2016-09-06 | Method for increasing carbon, silicon and manganese contents of molten steel of medium-high carbon steel by utilizing molten iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107794434A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512683A (en) * | 2021-07-16 | 2021-10-19 | 新疆八一钢铁股份有限公司 | Low-carbon consumption preparation method of high-strength anti-seismic steel bar |
| CN115404311A (en) * | 2022-09-23 | 2022-11-29 | 鞍钢股份有限公司 | Control method for producing high-carbon steel with low nitrogen content |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0488114A (en) * | 1990-07-31 | 1992-03-23 | Kawasaki Steel Corp | Method for producing high manganese steel |
| CN1876857A (en) * | 2005-06-11 | 2006-12-13 | 太原钢铁(集团)有限公司 | Method for smelting stainless steel using molten iron as raw material |
| CN105063265A (en) * | 2015-08-31 | 2015-11-18 | 山东钢铁股份有限公司 | Method for recarburizing No.45 steel by means of low-sulfur molten iron |
-
2016
- 2016-09-06 CN CN201610802952.4A patent/CN107794434A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0488114A (en) * | 1990-07-31 | 1992-03-23 | Kawasaki Steel Corp | Method for producing high manganese steel |
| CN1876857A (en) * | 2005-06-11 | 2006-12-13 | 太原钢铁(集团)有限公司 | Method for smelting stainless steel using molten iron as raw material |
| CN105063265A (en) * | 2015-08-31 | 2015-11-18 | 山东钢铁股份有限公司 | Method for recarburizing No.45 steel by means of low-sulfur molten iron |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512683A (en) * | 2021-07-16 | 2021-10-19 | 新疆八一钢铁股份有限公司 | Low-carbon consumption preparation method of high-strength anti-seismic steel bar |
| CN115404311A (en) * | 2022-09-23 | 2022-11-29 | 鞍钢股份有限公司 | Control method for producing high-carbon steel with low nitrogen content |
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Application publication date: 20180313 |