CN107779539A - A kind of method for reducing steel-making slag charge consumption - Google Patents
A kind of method for reducing steel-making slag charge consumption Download PDFInfo
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- CN107779539A CN107779539A CN201610765362.9A CN201610765362A CN107779539A CN 107779539 A CN107779539 A CN 107779539A CN 201610765362 A CN201610765362 A CN 201610765362A CN 107779539 A CN107779539 A CN 107779539A
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- molten iron
- steel
- oxygen
- slag
- slag charge
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a kind of method for reducing steel-making slag charge consumption, comprise the following steps：（1）Shove charge：Raw material enters stove and is fused into molten iron, and on-line monitoring, the monitoring molten iron band quantity of slag, hot metal composition, molten iron temperature and steel scrap state, according to the proportioning of thermal balance adjustment molten iron and steel scrap are carried out to often wrapping into stove molten iron；（2）Deslagging：Slag material lime and dolomite are quantitatively adding according to silicone content, molten iron temperature in molten iron；Molten iron temperature, which exceedes, to be required to replace slag material with ore and stone in the case of molten iron temperature；（3）Oxygen supply：Using oxygen rifle side oxygen decarburization；Oxygen pressure：0.8MPa ~ 1.0MPa, oxygen flow：7000 Nm3/h~10000Nm3/h；（4）Finished steel：Aluminium alloy and ferro-silico-manganese are added during tapping, carries out deep deoxidation and alloying.Steel-making slag charge consumption is this method reduce, has saved production cost.
Description
Technical field
The invention belongs to steelmaking technical field, and in particular to a kind of method for reducing steel-making slag charge consumption.
Background technology
Pneumatic steelmaking smelts latter stage molten steel and dissolves in excess of oxygen, and excessive oxygen separates out in solidification of molten steel to be formed oxide and be mingled with
And bubble, directly affect the quality of strand, product made from steel.Therefore need to reduce converter terminal oxygen content in steelmaking process, this is
The source of steel inclusion.At present, mainly had using method of deoxidation in domestic industry steelmaking process：Aluminium deoxidation method, going out
Molten steel during from steel to ladle adds metallic aluminium, and this deoxidation method method is fairly simple, but deoxidation effect is unstable, easily generation
Al2O3Class nonmetal inclusion, such Particulate Inclusion is small to be not easy the slagging that floats, and causes nonmetal inclusion increase in steel, and aluminium price surpasses
10,000 yuan/ton are crossed, ton steel cost is high；Carbon deoxidation method, adds carbonaceous material before tapping into ladle, and this method of deoxidation also compares
Relatively simple, deoxidation effect is also unstable, easily produces molten steel " turning over bag " and potential safety hazard occurs, and can make molten steel recarburization；Also silicon
Ca-alloy For Deoxidation method, this method refined molten steel oxygen content is unstable, and alloy absorption rate is low, and composition tolerances are too big, slag oxidisability
By force, deoxidier consumption is high.
The content of the invention
The present invention provides a kind of method for reducing steel-making slag charge consumption, this method for overcome the deficiencies in the prior art
Steel-making slag charge consumption is reduced, has saved production cost.
In order to achieve the above object, the present invention adopts the following technical scheme that：
The invention provides a kind of method for reducing steel-making slag charge consumption, comprise the following steps：
（1）Shove charge：Raw material enters stove and is fused into molten iron, and on-line monitoring, the monitoring molten iron band quantity of slag, molten iron are carried out to often wrapping into stove molten iron
Composition, molten iron temperature and steel scrap state, the proportioning of molten iron and steel scrap is adjusted according to thermal balance；
（2）Deslagging：Slag material lime and dolomite are quantitatively adding according to silicone content, molten iron temperature in molten iron；Molten iron temperature exceedes
It is required that replace slag material with ore and stone in the case of molten iron temperature；
（3）Oxygen supply：Using oxygen rifle side oxygen decarburization；Oxygen pressure：0.8MPa ~ 1.0MPa, oxygen flow：7000 Nm3/h~
10000Nm3/h；
（4）Finished steel：Aluminium alloy and ferro-silico-manganese are added during tapping, carries out deep deoxidation and alloying.
The method consumed according to above-mentioned reduction steel-making slag charge, the raw material is to be remained in heavy burder, steel scrap, steel cuttings and converter
At least one of slag charge.
The method consumed according to above-mentioned reduction steel-making slag charge, it is described to require that molten iron temperature is 1250 DEG C ~ 1300 DEG C.
Compared with prior art, the beneficial effect that the present invention obtains：
1. in shove charge step of the present invention, raw material enters stove and is fused into molten iron, carries out on-line monitoring to often wrapping into stove molten iron, monitors iron
The water band quantity of slag, hot metal composition, molten iron temperature and steel scrap state, the proportioning of molten iron and steel scrap is adjusted according to thermal balance；Such as molten iron silicon
Gao Shi, be advantageous to eat steel scrap, few hot metal charging more, while also reduce slag charge addition；Raw material uses and stays part slag generation in the step
Slag charge addition is reduced for the method for part slag charge；Present invention process uses double slag operation, avoids secondary caused by terminal phosphorus height
Charging, which is re-blow, wastes slag charge consumption.
2. being dropped to using the consumption of present invention process slag charge below 65 kilograms of ton steel, 18 kilograms are reduced in traditional technique；And
And obtain preferable economic benefit in later maintenance, energy resource consumption, safety in production etc..
Embodiment
A kind of method for reducing steel-making slag charge consumption, comprises the following steps：
（1）Shove charge：Raw material enters stove and is fused into molten iron, and on-line monitoring, the monitoring molten iron band quantity of slag, molten iron are carried out to often wrapping into stove molten iron
Composition, molten iron temperature and steel scrap state, the proportioning of molten iron and steel scrap is adjusted according to thermal balance；
（2）Deslagging：Slag material lime and dolomite are quantitatively adding according to silicone content, molten iron temperature in molten iron；Molten iron temperature exceedes
It is required that replace slag material with ore and stone in the case of temperature；
（3）Oxygen supply：Using oxygen rifle side oxygen decarburization；Oxygen pressure：0.8MPa ~ 1.0MPa, oxygen flow：7000 Nm3/h~
10000Nm3/h；
（4）Finished steel：Aluminium alloy and ferro-silico-manganese are added during tapping, carries out deep deoxidation and alloying.
Above-mentioned raw materials are at least one of slag charge remained in heavy burder, steel scrap, steel cuttings and converter；Above-mentioned requirements molten iron temperature
Spend for 1250 DEG C ~ 1300 DEG C.
Claims (3)
- A kind of 1. method for reducing steel-making slag charge consumption, it is characterised in that comprise the following steps：（1）Shove charge：Raw material enters stove and is fused into molten iron, and on-line monitoring, the monitoring molten iron band quantity of slag, molten iron are carried out to often wrapping into stove molten iron Composition, molten iron temperature and steel scrap state, the proportioning of molten iron and steel scrap is adjusted according to thermal balance；（2）Deslagging：Slag material lime and dolomite are quantitatively adding according to silicone content, molten iron temperature in molten iron；Molten iron temperature exceedes It is required that replace slag material with ore and stone in the case of molten iron temperature；（3）Oxygen supply：Using oxygen rifle side oxygen decarburization；Oxygen pressure：0.8MPa ~ 1.0MPa, oxygen flow：7000 Nm3/h~ 10000Nm3/h；（4）Finished steel：Aluminium alloy and ferro-silico-manganese are added during tapping, carries out deep deoxidation and alloying.
- 2. the method according to claim 1 for reducing steel-making slag charge consumption, it is characterised in that：The raw material is heavy burder, given up At least one of slag charge remained in steel, steel cuttings and converter.
- 3. the method according to claim 1 for reducing steel-making slag charge consumption, it is characterised in that：It is described to require that molten iron temperature is 1250℃~1300℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610765362.9A CN107779539A (en) | 2016-08-31 | 2016-08-31 | A kind of method for reducing steel-making slag charge consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610765362.9A CN107779539A (en) | 2016-08-31 | 2016-08-31 | A kind of method for reducing steel-making slag charge consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107779539A true CN107779539A (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610765362.9A Pending CN107779539A (en) | 2016-08-31 | 2016-08-31 | A kind of method for reducing steel-making slag charge consumption |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624324A (en) * | 2020-04-16 | 2020-09-04 | 河钢乐亭钢铁有限公司 | Method for testing quality of steel scrap for steelmaking by using converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205523A (en) * | 2013-03-29 | 2013-07-17 | 江苏省沙钢钢铁研究院有限公司 | Novel process for cooling by adopting stones in converter smelting |
| CN103667588A (en) * | 2013-09-05 | 2014-03-26 | 通裕重工股份有限公司 | Electric converter steelmaking process |
| CN103757173A (en) * | 2014-01-21 | 2014-04-30 | 河北钢铁股份有限公司唐山分公司 | Low-lime-consumption converter steel-making method |
-
2016
- 2016-08-31 CN CN201610765362.9A patent/CN107779539A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205523A (en) * | 2013-03-29 | 2013-07-17 | 江苏省沙钢钢铁研究院有限公司 | Novel process for cooling by adopting stones in converter smelting |
| CN103667588A (en) * | 2013-09-05 | 2014-03-26 | 通裕重工股份有限公司 | Electric converter steelmaking process |
| CN103757173A (en) * | 2014-01-21 | 2014-04-30 | 河北钢铁股份有限公司唐山分公司 | Low-lime-consumption converter steel-making method |
Non-Patent Citations (1)
| Title |
|---|
| 厉英: "《冶金工艺设计》", 30 November 2014, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624324A (en) * | 2020-04-16 | 2020-09-04 | 河钢乐亭钢铁有限公司 | Method for testing quality of steel scrap for steelmaking by using converter |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180309 |
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| RJ01 | Rejection of invention patent application after publication |