CN107794434A - A kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron - Google Patents
A kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron Download PDFInfo
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- 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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- molten iron
- steel
- molten
- carbon
- iron
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- 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
Abstract
The present invention provides a kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron, selects 1350 DEG C of molten iron temperature ＞；C 4.0~4.5% in molten iron, Si 0.30~1.0%, Mn ＜ 0.30%, P≤0.070%, S≤0.070%；Molten iron removes surface residual debris using operation of skimming preceding is carried out, and molten iron level is exposed to more than 90%, and the molten iron after skimming is not more than 20min to the stand-by period before iron is turned over.Steel grade finished product C ＞ 0.30% are selected, P ＜ 0.025%, S ＞ 0.010% middle, high-carbon steel grade, control its carbon content of tapping with the difference of steel grade target upper limit within 0.35%；After converter tapping terminates, fold into molten iron to ladle and be not more than 10 tons；The heat of molten iron is folded into ladle, Tapping Temperature of Bof, hanging pot temperature improve 5~10 DEG C on the basis of technological parameter requirement.The present invention can effectively control the steel technology of steelmaking process, reduce steel grade alloying cost.
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 | A kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802952.4A CN107794434A (en) | 2016-09-06 | 2016-09-06 | A kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107794434A true CN107794434A (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610802952.4A Pending CN107794434A (en) | 2016-09-06 | 2016-09-06 | A kind of method for increasing medium and high carbon steel molten steel carbon silicomanganese content using molten iron |
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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 |