CN109913612A - Control method for green and environment-friendly smelting of converter - Google Patents
Control method for green and environment-friendly smelting of converter Download PDFInfo
- Publication number
- CN109913612A CN109913612A CN201910168629.XA CN201910168629A CN109913612A CN 109913612 A CN109913612 A CN 109913612A CN 201910168629 A CN201910168629 A CN 201910168629A CN 109913612 A CN109913612 A CN 109913612A
- Authority
- CN
- China
- Prior art keywords
- oxygen
- slag
- converter
- control method
- smelting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims description 9
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 4
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 4
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 4
- 239000001095 magnesium carbonate Substances 0.000 claims description 4
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims description 3
- 235000003283 Pachira macrocarpa Nutrition 0.000 claims 1
- 241001083492 Trapa Species 0.000 claims 1
- 235000014364 Trapa natans Nutrition 0.000 claims 1
- 235000009165 saligot Nutrition 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 239000003500 flue dust Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a control method for green and environment-friendly smelting of a converter, which specifically comprises the following steps: 1) when the Si and Ti in the molten iron are more than or equal to 0.7 percent, carrying out double-slag operation; 2) after the double slag is finished, rocking the furnace twice before and after, wherein the rocking angle is 30-minus 30 degrees, and waiting for 1-2 min at the zero position and then blowing oxygen by a gun; 3) the oxygen pressure valve of the secondary gun feeding is manually adjusted to 30 to 35 percent, and the oxygen flow is 35000m3/h～38000m3The gun position is 3.0-3.2 m; 4) the oxygen blowing time is 30-40 s, after the flow is stable, the pressure valve is manually adjusted to be restored to 85% -88% of the initial state, and the oxygen flow is adjusted to 51000m3/h～53000m3H; 5) in the early stage and the middle stage of blowing, pressing slag by using a slag pressing material, wherein the addition amount of the slag pressing material is 200-300 kg per batch; in the later stage of blowing, only the iron-containing materials are allowed to be added, and the adding amount is less than or equal to 300kg per batch. The invention effectively controls the metal splashing which is easy to occur when the secondary lance is put down, eliminates the phenomenon of smoke dust overflow pollution when the secondary lance is put down, stably controls the converter smelting, reduces the environmental pollution and simultaneously reduces the consumption of steel materials.
Description
Technical field
The present invention relates to converter smelting process, in particular to the control method of a kind of environmentally protective smelting of converter.
Background technique
Pollution problem in Production Process for Steel Enterprise is concerned, wet dedusting, unstable by molten iron Si, Ti content
It influences, double slag melting ratios are at 15~20%, secondary lower rifle due to easily causing outside flue dust in during carbon oxygen intense reaction
It overflows, the flue gas pollutant of formation, environmental protection of enterprise pressure is huge.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of control methods of the environmentally protective smelting of converter, eliminate two
The phenomenon that secondary lower rifle flue dust excessive pollution, realize converter smelting stability contorting.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of control method of the environmentally protective smelting of converter, specifically includes:
1) as Si+Ti >=0.7% in molten iron, double slag operation；
2) after double slags, more than twice, grate angle is 30 °~-30 ° to front and back grate, and zero-bit waits 1min~2min
Descend rifle oxygen blast again afterwards；
3) secondary lower rifle oxygen pressure valve is manually adjusted to 30%~35%, oxygen flow 35000m3/ h~38000m3/ h,
Rifle position 3.0m~3.2m；
4) oxygen blow duration 30s~40s, after stability of flow, manually adjust pressure valve restore to the 85% of original state~
88%, oxygen flow is adjusted to 51000m3/ h~53000m3/h；
5) charging control
A. Primary period, mid-term press slag using pressure slag charge, and pressure slag charge additional amount is 200~300kg/ batch；
B. it blows the later period, only allows that ferrous material, additional amount≤300kg/ batch is added.
Pressing slag charge is magnesite or dolomite.
Ferrous material is iron carbon ball or sinter.
Compared with prior art, the beneficial effects of the present invention are:
The present invention effectively controls incident metal expulsion when secondary lower rifle by process optimization, eliminate it is secondary under
The phenomenon that rifle flue dust excessive pollution, converter smelting stability contorting is realized, is reduced environmental pollution, while reducing iron and steel stock and disappearing
Consumption.
Specific embodiment
Below with reference to embodiment, the present invention is further described:
A kind of control method of the environmentally protective smelting of converter, specifically includes:
1) as Si+Ti >=0.7% in molten iron, double slag operation；
2) after double slags, twice, grate angle is 30 °~-30 ° to front and back grate, after zero-bit waiting 1min~2min again
Lower rifle oxygen blast；
3) secondary lower rifle oxygen pressure valve is manually adjusted to 30%~35%, oxygen flow 35000m3/ h~38000m3/ h,
Rifle position 3.0m~3.2m；
4) oxygen blow duration 30s~40s, after stability of flow, manually adjust pressure valve restore to the 85% of original state~
88%, oxygen flow is adjusted to 51000m3/ h~53000m3/h；
5) charging control
A. Primary period, mid-term press slag using pressure slag charge, and pressure slag charge additional amount is 200~300kg/ batch；
B. it blows the later period, only allows that ferrous material, additional amount≤300kg/ batch is added.
Pressing slag charge is magnesite or dolomite.
Ferrous material is iron carbon ball or sinter.
Embodiment
A kind of control method of the environmentally protective smelting of converter, specifically includes:
1. working as 1340 DEG C of molten iron temperature, silicone content 0.72%, when Ti content 0.12%, double slag operation are forecast；
2. 6min slagging of blowing, front and back grate 2 times (30 °~-30 °), after zero-bit waits 1min, lower rifle oxygen blast；
3. oxygen pressure valve is manually adjusted to 30%, oxygen flow sets 35000m3/ h, lower rifle rifle position set 3.0m；
4. after oxygen blast 35s, oxygen flow is stablized in 35000m3/ h is adjusted pressure valve and is restored initial shape using manual mode
State 85%, flow is adjusted to 51000m3/h；
5. Primary period, mid-term, blow 8min when, use magnesite to press slag, additional amount 200kg is added 2 batches altogether；It blows
Refine the later period, blow 12min when, be added 2 batches, sinter, every batch of 200kg.
Using in above method smelting process without run slag, the excessive phenomenon of flue dust, realize stability contorting.
The present invention will be described in detail for following embodiment.These embodiments be only to preferred embodiment of the invention into
Row description, does not limit the scope of the present invention.
Claims (3)
1. a kind of control method of the environmentally protective smelting of converter, which is characterized in that specifically include:
1) as Si+Ti >=0.7% in molten iron, double slag operation；
2) after double slags, more than twice, grate angle is 30 °~-30 ° to front and back grate, after zero-bit waiting 1min~2min again
Lower rifle oxygen blast；
3) secondary lower rifle oxygen pressure valve is manually adjusted to 30%~35%, oxygen flow 35000m3/ h~38000m3/ h, rifle position
3.0m~3.2m；
4) oxygen blow duration 30s~40s after stability of flow, manually adjusts pressure valve and restores to the 85%~88% of original state, oxygen
Throughput is adjusted to 51000m3/ h~53000m3/h；
5) charging control
A. Primary period, mid-term press slag using pressure slag charge, and pressure slag charge additional amount is 200~300kg/ batch；
B. it blows the later period, only allows that ferrous material, additional amount≤300kg/ batch is added.
2. a kind of control method of the environmentally protective smelting of converter according to claim 1, which is characterized in that pressure slag charge is water chestnut
Magnesite or dolomite.
3. a kind of control method of the environmentally protective smelting of converter according to claim 1, which is characterized in that ferrous material is
Iron carbon ball or sinter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168629.XA CN109913612B (en) | 2019-03-06 | 2019-03-06 | Control method for green and environment-friendly smelting of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168629.XA CN109913612B (en) | 2019-03-06 | 2019-03-06 | Control method for green and environment-friendly smelting of converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109913612A true CN109913612A (en) | 2019-06-21 |
| CN109913612B CN109913612B (en) | 2020-09-29 |
Family
ID=66963642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910168629.XA Active CN109913612B (en) | 2019-03-06 | 2019-03-06 | Control method for green and environment-friendly smelting of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109913612B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619375A (en) * | 2009-08-07 | 2010-01-06 | 山西太钢不锈钢股份有限公司 | Method for preventing electric precipitation detonation discharge of top and bottom blown converter |
| CN103074463A (en) * | 2013-01-04 | 2013-05-01 | 宣化钢铁集团有限责任公司 | Operation method of lifting lance in the midway of converter steelmaking under dry dedusting condition |
| CN104232830A (en) * | 2014-08-29 | 2014-12-24 | 武汉钢铁(集团)公司 | Method for smelting ultralow-phosphor steel at low temperature in converter |
| CN104878154A (en) * | 2015-05-22 | 2015-09-02 | 武汉钢铁(集团)公司 | Direct reduction alloying method for nickel ore in revolving furnace |
| CN105331765A (en) * | 2015-11-26 | 2016-02-17 | 宣化钢铁集团有限责任公司 | Method for secondary gun feeding blowing of dry dust removing converter |
-
2019
- 2019-03-06 CN CN201910168629.XA patent/CN109913612B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619375A (en) * | 2009-08-07 | 2010-01-06 | 山西太钢不锈钢股份有限公司 | Method for preventing electric precipitation detonation discharge of top and bottom blown converter |
| CN103074463A (en) * | 2013-01-04 | 2013-05-01 | 宣化钢铁集团有限责任公司 | Operation method of lifting lance in the midway of converter steelmaking under dry dedusting condition |
| CN104232830A (en) * | 2014-08-29 | 2014-12-24 | 武汉钢铁(集团)公司 | Method for smelting ultralow-phosphor steel at low temperature in converter |
| CN104878154A (en) * | 2015-05-22 | 2015-09-02 | 武汉钢铁(集团)公司 | Direct reduction alloying method for nickel ore in revolving furnace |
| CN105331765A (en) * | 2015-11-26 | 2016-02-17 | 宣化钢铁集团有限责任公司 | Method for secondary gun feeding blowing of dry dust removing converter |
Non-Patent Citations (2)
| Title |
|---|
| 王小善等: "干法除尘在180t转炉的应用", 《第十一届中国钢铁年会论文集》 * |
| 董文林: "120t转炉干法除尘中高碳钢冶炼工艺优化", 《中国金属通报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109913612B (en) | 2020-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102660658B (en) | Method for curing converter slag | |
| CN102080136B (en) | Converter smelting technique | |
| CN105525055B (en) | A kind of control method of converter less-slag melting carbon period splash | |
| CN108913837A (en) | A kind of high scrap ratio smelting process of converter | |
| CN110724784B (en) | Low-silicon high-phosphorus molten iron converter smelting method | |
| CN106636534B (en) | The method for controlling Automobile Plate ladle top slag calcium aluminium ratio 1.2-1.8 | |
| CN101724727B (en) | Short-flow rotary hearth furnace continuous steelmaking method comprehensively utilizing resources | |
| CN112813222A (en) | Blowing method for high scrap ratio molten iron of converter | |
| CN107988456B (en) | A kind of converter steelmaking process | |
| CN107779550B (en) | The method of molten steel manganeisen additional amount is reduced in a kind of refining process | |
| CN113293260A (en) | Efficient dephosphorization process method using fly ash as converter slagging agent | |
| CN109913612A (en) | Control method for green and environment-friendly smelting of converter | |
| CN105483316B (en) | The method of chrome ore DIRECT ALLOYING in Converter | |
| CN108384916B (en) | Method for improving control capability of steelmaking converter blowing end point carbon | |
| CN104232834B (en) | Pneumatic steelmaking automaton and its application method based on pattern | |
| CN108842027B (en) | Gasification dephosphorization method and smelting method for final slag of dephosphorization converter | |
| CN1325672C (en) | Lead smelting method and apparatus implementing the same | |
| CN107012283A (en) | Converter slag retention method | |
| CN101565767A (en) | Method for melting reduction iron making | |
| CN113355487A (en) | Magnesium-free mineral phase reconstruction agent, preparation method thereof and converter steelmaking slagging method | |
| CN112342335B (en) | Converter smoke dust overflow control method | |
| CN111647707B (en) | Smelting method for improving oxygen supply strength of converter in sectional mode | |
| CN114774616A (en) | Method for reducing oxygen consumption by controlling lance position of oxygen lance of top-blown converter | |
| CN114807497A (en) | Method for smelting high-silicon molten iron by using bottom oxygen blowing and lime powder combined blowing converter | |
| CN114058771A (en) | Slag charging converter steelmaking method capable of reducing early-stage slag overflow |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |