CN109913612B - 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
- CN109913612B CN109913612B CN201910168629.XA CN201910168629A CN109913612B CN 109913612 B CN109913612 B CN 109913612B CN 201910168629 A CN201910168629 A CN 201910168629A CN 109913612 B CN109913612 B CN 109913612B
- Authority
- CN
- China
- Prior art keywords
- slag
- oxygen
- blowing
- gun
- iron
- 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.)
- Active
Links
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, the furnace is shaken for more than two times in front and back, and the furnace is shakenThe angle is 30 degrees to-30 degrees, and oxygen is blown by a gun after the zero position waits for 1min to 2 min; 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 invention relates to a converter smelting process, in particular to a control method for green and environment-friendly smelting of a converter.
Background
The pollution problem in the production process of iron and steel enterprises is concerned, wet dust removal is influenced by unstable contents of Si and Ti in molten iron, the smelting proportion of double slag is 15-20%, and smoke dust is easy to overflow due to the fact that the double slag is in a carbon-oxygen violent reaction period when the double slag is discharged from a gun for the second time, formed smoke pollutants are generated, and the environmental protection pressure of the enterprises is huge.
Disclosure of Invention
The invention aims to solve the technical problem of providing a control method for green and environment-friendly smelting of a converter, eliminating the phenomenon of secondary off-lance smoke dust overflow pollution and realizing stable control of the converter smelting.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for converter green environmental protection smelting 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～53000m3/h；
5) Charge control
a. 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;
b. 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 slag pressing material is magnesite or dolomite.
The iron-containing material is iron carbon balls or sinter.
Compared with the prior art, the invention has the beneficial effects that:
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, realizes the stable control of the converter smelting, reduces the environmental pollution and simultaneously reduces the consumption of steel materials.
Detailed Description
The invention is further illustrated by the following examples:
a control method for converter green environmental protection smelting 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, wherein the angle of rocking the furnace 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～53000m3/h；
5) Charge control
a. 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;
b. 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 slag pressing material is magnesite or dolomite.
The iron-containing material is iron carbon balls or sinter.
Examples
A control method for converter green environmental protection smelting specifically comprises the following steps:
1. when the temperature of molten iron is 1340 ℃, the predicted silicon content is 0.72 percent, and the titanium content is 0.12 percent, carrying out double-slag operation;
2. blowing for 6min, discharging slag, shaking the furnace for 2 times (30-minus 30 degrees) before and after blowing, and blowing oxygen by a gun after waiting for 1min in a zero position;
3. the oxygen pressure valve is manually adjusted to 30 percent, and the oxygen flow is set to 35000m3Setting the gun position of the lower gun to be 3.0 m;
4. after blowing oxygen for 35s, the oxygen flow is stabilized at 35000m3H, adopting a manual mode, adjusting the pressure valve to recover the initial state by 85 percent, and adjusting the flow to 51000m3/h；
5. In the early stage and the middle stage of blowing, when blowing is carried out for 8min, magnesite pressing slag is used, the addition amount is 200kg, and 2 batches are added in total; at the later stage of blowing, when the blowing time is 12min, 2 batches of sintered ore, 200kg of each batch, are added.
The method has the advantages of no slag leakage and smoke overflow in the smelting process and stable control.
The following examples describe the invention in detail. These examples are merely illustrative of the best embodiments of the present invention and do not limit the scope of the invention.
Claims (3)
1. A control method for converter green environmental protection smelting is characterized by comprising 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～53000m3/h；
5) Charge control
a. 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;
b. 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.
2. The control method for green and environment-friendly smelting of the converter according to claim 1, wherein the slag pressing material is magnesite or dolomite.
3. The control method for green and environment-friendly smelting of the converter according to claim 1, wherein the iron-containing material is iron carbon balls or sintered ore.
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 CN109913612A (en) | 2019-06-21 |
| CN109913612B true 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) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619375B (en) * | 2009-08-07 | 2011-06-01 | 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 |
| CN104232830B (en) * | 2014-08-29 | 2016-04-27 | 武汉钢铁(集团)公司 | The method of converter low temperature smelting ultra-low phosphoretic steel |
| CN104878154B (en) * | 2015-05-22 | 2018-01-30 | 武汉钢铁有限公司 | The method of nickel minerals direct Reducing and Alloying in converter |
| CN105331765B (en) * | 2015-11-26 | 2017-04-26 | 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
Also Published As
| Publication number | Publication date |
|---|---|
| CN109913612A (en) | 2019-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105525055B (en) | A kind of control method of converter less-slag melting carbon period splash | |
| CN102660658B (en) | Method for curing converter slag | |
| CN104928439B (en) | One kind utilizes CO2The method that dephosphorization efficiency is improved in duplex converter | |
| CN106191344A (en) | A kind of slag melting and reducing that mixes produces the method with modifier treatment | |
| CN106048109A (en) | Method for mixed slag smelting reduction recycling and thermal refining | |
| CN108998614B (en) | Smelting method of ultra-low manganese steel | |
| CN109097523A (en) | A kind of double slag process smelting process | |
| CN115323099B (en) | Steelmaking method for recycling magnetic separation steel slag by converter | |
| CN110724784B (en) | Low-silicon high-phosphorus molten iron converter smelting method | |
| CN104004882B (en) | A kind of half steel increases the method for silicon process and the method for semisteel converter steelmaking | |
| CN108300831B (en) | Method for improving heat source in smelting process of dephosphorization converter | |
| CN106119449B (en) | A kind of blast furnace whole world group smelting process | |
| CN106636534A (en) | Method for controlling ratio of calcium to aluminum of auto sheet ladle top slag to be 1.2-1.8 | |
| CN104060016B (en) | By the method for the converter smelting weathering steel of desulfurization slag, steel slag instead part steel scrap | |
| CN114717375A (en) | Method for converter-rotating smelting of high-temperature molten iron under slag-remaining and dry-method dedusting conditions | |
| CN110453025A (en) | A kind of method that high calcium v-bearing steel slag smelts the rich vanadium pig iron | |
| CN109913612B (en) | Control method for green and environment-friendly smelting of converter | |
| CN105483316B (en) | The method of chrome ore DIRECT ALLOYING in Converter | |
| CN103534363A (en) | Direct smelting process for high sulphur feed | |
| CN107779550A (en) | A kind of method that molten steel manganeisen addition is reduced in refining process | |
| CN108384916B (en) | Method for improving control capability of steelmaking converter blowing end point carbon | |
| CN109112250B (en) | Gasification dephosphorization and cyclic utilization method in semi-steel smelting converter final slag furnace | |
| CN114657312B (en) | Method for smelting high-silicon molten iron by converter under dry dedusting condition | |
| CN108842027B (en) | Gasification dephosphorization method and smelting method for final slag of dephosphorization converter | |
| CN111349797A (en) | Method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by converter |
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 |