CN106544463A - A kind of method for maintaining converter - Google Patents
A kind of method for maintaining converter Download PDFInfo
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- CN106544463A CN106544463A CN201510594940.2A CN201510594940A CN106544463A CN 106544463 A CN106544463 A CN 106544463A CN 201510594940 A CN201510594940 A CN 201510594940A CN 106544463 A CN106544463 A CN 106544463A
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- slag
- pig iron
- converter
- tapping
- temperature
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Abstract
The present invention provides a kind of method for maintaining converter, and being poured in converter finishing slag using the pig iron makes slag rapidly cool down, and the last pig iron is pasted in being rolled in slag on furnace lining, reaches the purpose of furnace retaining.Compared with prior art, the invention has the beneficial effects as follows：After method of the present invention charging furnace retaining; the pig iron and slag persistently can be kept more than 6 stoves meeting untouchable furnace retaining effect; instead of completely carries out the method for meeting untouchable fettling using magnesia big face mending material, and the purpose of environmental conservation is reached while maintaining converter effect is improved.The inventive method is simple in addition, and low cost, maintaining converter operating time are short, and the furnace retaining cycle is long, is conducive to improve production efficiency.
Description
Technical field
The present invention relates to field of metallurgy, more particularly to a kind of method for maintaining converter.
Background technology
Converter is most fast position of deteriorating in whole steelmaking process, and affects whole stove to use as a servant the key link in cycle.It is existing
In having technology, for the method that the maintenance of whole furnace lining uses slag splashing, the method for maintaining converter is for charging side for converter
The big face mending material of magnesia class is mainly adopted, mending material is sintered using converter lining heat, using the mending material after sintering
To reduce the impact to furnace lining.
In the method for slag splashing, magnesia class mending material can make converter dust-removing during production using Colophonium as binding agent
Float severe overweight in water, will ultimately result in serious environmental pollution.
The content of the invention
It is an object of the invention to provide a kind of method for maintaining converter, being poured in converter finishing slag using the pig iron makes slag rapidly cool down,
The last pig iron is pasted on furnace lining in being rolled in slag, reaches the purpose of furnace retaining.It is after using method of the present invention charging furnace retaining, raw
Ferrum and slag persistently can be kept more than 6 stoves meeting untouchable furnace retaining effect, be instead of completely and are entered using magnesia big face mending material
The method that row meets untouchable fettling, reaches the purpose of environmental conservation while maintaining converter effect is improved.
For achieving the above object, the present invention employs the following technical solutions realization：
A kind of method for maintaining converter, the pig iron is poured in converter finishing slag makes slag rapidly cool down, and the last pig iron is glued in being rolled in slag
It is attached on furnace lining, reaches the purpose of furnace retaining, concrete grammar step is as follows：
1) after tapping terminates, the pig iron is ploughed under in liquid slag in 3min, ploughs under the pig iron and meet ferrum direction backward and converter is shaken
To level；
2) converter is shaken to level the time of staying and is：When slag temperature is 1650-1670 DEG C after tapping, 13-15min is stopped；
When slag temperature is 1630-1650 DEG C after tapping, 10-13min is stopped；After tapping, slag temperature is 1610-1630 DEG C
When, stop 7-10min；
3) pig iron is poured in converter into, is shaken to level and is stopped after cooling, converter is shaken to vertically carrying out splashing slag, slag pressure is splashed
1.1-1.4MPa；Splashing the slag time is：When slag temperature is 1650-1670 DEG C after tapping, slag 2.5-3.0min is splashed；When going out
When slag temperature is 1630-1650 DEG C after steel, slag 2.2-2.5min is splashed；When after tapping, slag temperature is 1610-1630 DEG C,
Splash slag 2.0-2.3min；
4) deslagging operation is carried out after splashing slag, floating slag in stove is all poured in slag ladle.
The pig iron composition is：C:3.7%-4.5%, Si：0.20%-0.80%, Mn：0.05%-0.35%, P：＜ 0.090%,
S：＜ 0.060%, remaining is ferrum and inevitable impurity.
Described pig iron usage amount is：When slag temperature is 1650-1670 DEG C after tapping, pig iron 2.0-2.2 tons are added；
When slag temperature is 1630-1650 DEG C after tapping, pig iron 1.8-2.0 tons are added；After tapping, slag temperature is
When 1610-1630 DEG C, pig iron 1.5-1.8 tons are added.
Compared with prior art, the invention has the beneficial effects as follows：
A kind of method for maintaining converter, being poured in converter finishing slag using the pig iron makes slag rapidly cool down, and the last pig iron is rolled in slag
Paste on furnace lining, reach the purpose of furnace retaining.After method of the present invention charging furnace retaining, the pig iron and slag are meeting untouchable
Furnace retaining effect persistently can keep more than 6 stoves, and instead of completely carries out the method for meeting untouchable fettling using magnesia big face mending material,
The purpose of environmental conservation is reached while maintaining converter effect is improved.The inventive method is simple in addition, low cost, converter shield
The stove operating time is short, and the furnace retaining cycle is long, is conducive to improve production efficiency.
Specific embodiment
Below the present invention is described in detail, it should be noted that the enforcement of the present invention is not limited to following embodiment.
A kind of method for maintaining converter, the pig iron is poured in converter finishing slag makes slag rapidly cool down, and the last pig iron is glued in being rolled in slag
It is attached on furnace lining, reaches the purpose of furnace retaining, concrete grammar step is as follows：
1) after tapping terminates, the pig iron is ploughed under in liquid slag in 3min, ploughs under the pig iron and meet ferrum direction backward and converter is shaken
To level；
2) converter is shaken to level the time of staying and is：When slag temperature is 1650-1670 DEG C after tapping, 13-15min is stopped；
When slag temperature is 1630-1650 DEG C after tapping, 10-13min is stopped；After tapping, slag temperature is 1610-1630 DEG C
When, stop 7-10min；
3) pig iron is poured in converter into, is shaken to level and is stopped after cooling, converter is shaken to vertically carrying out splashing slag, slag pressure is splashed
1.1-1.4MPa；Splashing the slag time is：When slag temperature is 1650-1670 DEG C after tapping, slag 2.5-3.0min is splashed；When going out
When slag temperature is 1630-1650 DEG C after steel, slag 2.2-2.5min is splashed；When after tapping, slag temperature is 1610-1630 DEG C,
Splash slag 2.0-2.3min；
4) deslagging operation is carried out after splashing slag, floating slag in stove is all poured in slag ladle.
The pig iron composition is：C:3.7%-4.5%, Si：0.20%-0.80%, Mn：0.05%-0.35%, P：＜ 0.090%,
S：＜ 0.060%, remaining is ferrum and inevitable impurity.
Described pig iron usage amount is：When slag temperature is 1650-1670 DEG C after tapping, pig iron 2.0-2.2 tons are added；
When slag temperature is 1630-1650 DEG C after tapping, pig iron 1.8-2.0 tons are added；After tapping, slag temperature is
When 1610-1630 DEG C, pig iron 1.5-1.8 tons are added.
A kind of method for maintaining converter of the present invention, 6 stoves are a furnace retaining cycle, i.e. 6 furnace rear of converter cyclic production, are entered
The row once operation of method for maintaining converter as above.
Heretofore described method is specifically described below by specific embodiment.
Embodiment 1：
1) take the pig iron to pour in liquid slag, be that liquid slag is lowered the temperature, pig iron composition：C:3.7%th, Si：0.20%th, Mn：
0.05%th, P：＜ 0.090%, S：＜ 0.060%.
2) pig iron usage amount：1650-1670 DEG C of slag temperature after tapping, adds 2.0 tons of the pig iron.
3) after tapping terminates, the pig iron is ploughed under in liquid slag in 3min, ploughs under the pig iron and meet ferrum direction backward and converter is shaken
To level.
4) time of staying is shaken to level in converter：1650-1670 DEG C of slag temperature after tapping, stops 13-15min.
5) pig iron is poured in converter into, is shaken to level and is stopped after cooling, converter is shaken to vertically carrying out splashing slag, slag pressure is splashed
1.1-1.4MPa.Splash the slag time：1650-1670 DEG C of slag temperature after tapping, splashes slag 2.5-3.0min.
6) deslagging operation is carried out after splashing slag, floating slag in stove is all poured in slag ladle.
Embodiment 2：
1) take the pig iron to pour in liquid slag, be that liquid slag is lowered the temperature, pig iron composition：C:4.5%th, Si：0.80%th,
Mn：0.35%th, P：＜ 0.090%, S：＜ 0.060%.
2) pig iron usage amount：1630-1650 DEG C of slag temperature after tapping, adds 1.8 tons of the pig iron.
3) after tapping terminates, the pig iron is ploughed under in liquid slag in 3min, ploughs under the pig iron and meet ferrum direction backward and converter is shaken
To level.
4) time of staying is shaken to level in converter：1630-1650 DEG C of slag temperature after tapping, stops 10-13min.
5) pig iron is poured in converter into, is shaken to level and is stopped after cooling, converter is shaken to vertically carrying out splashing slag, slag pressure is splashed
1.1-1.4MPa.Splash the slag time：1630-1650 DEG C of slag temperature after tapping, splashes slag 2.2-2.5min.
6) deslagging operation is carried out after splashing slag, floating slag in stove is all poured in slag ladle.
Embodiment 3：
1) take the pig iron to pour in liquid slag, be that liquid slag is lowered the temperature, pig iron composition：C:4.0%th, Si：0.5%th, Mn：
0.2%th, P：＜ 0.090%, S：＜ 0.060%.
2) pig iron usage amount：1610-1630 DEG C of slag temperature after tapping, adds 1.5 tons of the pig iron.
3) after tapping terminates, the pig iron is ploughed under in liquid slag in 3min, ploughs under the pig iron and meet ferrum direction backward and converter is shaken
To level.
4) time of staying is shaken to level in converter：1610-1630 DEG C of slag temperature after tapping, stops 7-10min.
5) pig iron is poured in converter into, is shaken to level and is stopped after cooling, converter is shaken to vertically carrying out splashing slag, slag pressure is splashed
1.1-1.4MPa.Splash the slag time：1610-1630 DEG C of slag temperature after tapping, splashes slag 2.0-2.3min.
6) deslagging operation is carried out after splashing slag, floating slag in stove is all poured in slag ladle.
Claims (3)
1. a kind of method for maintaining converter, it is characterised in that pouring the pig iron in converter finishing slag into makes slag rapidly cool down, finally
The pig iron is pasted in being rolled in slag on furnace lining, reaches the purpose of furnace retaining, and concrete grammar step is as follows：
1) after tapping terminates, the pig iron is ploughed under in liquid slag in 3min, ploughs under the pig iron and meet ferrum direction backward and converter is shaken
To level；
2) converter is shaken to level the time of staying and is：When slag temperature is 1650-1670 DEG C after tapping, 13-15min is stopped；
When slag temperature is 1630-1650 DEG C after tapping, 10-13min is stopped；After tapping, slag temperature is 1610-1630 DEG C
When, stop 7-10min；
3) pig iron is poured in converter into, is shaken to level and is stopped after cooling, converter is shaken to vertically carrying out splashing slag, slag pressure is splashed
1.1-1.4MPa；Splashing the slag time is：When slag temperature is 1650-1670 DEG C after tapping, slag 2.5-3.0min is splashed；When going out
When slag temperature is 1630-1650 DEG C after steel, slag 2.2-2.5min is splashed；When after tapping, slag temperature is 1610-1630 DEG C,
Splash slag 2.0-2.3min；
4) deslagging operation is carried out after splashing slag, floating slag in stove is all poured in slag ladle.
2. a kind of method for maintaining converter according to claim 1, it is characterised in that the pig iron composition is：
C:3.7%-4.5%, Si：0.20%-0.80%, Mn：0.05%-0.35%, P：＜ 0.090%, S：＜ 0.060%, remaining
For ferrum and inevitable impurity.
3. a kind of method for maintaining converter according to claim 1, it is characterised in that described pig iron usage amount is：
When slag temperature is 1650-1670 DEG C after tapping, pig iron 2.0-2.2 tons are added；After tapping, slag temperature is
When 1630-1650 DEG C, pig iron 1.8-2.0 tons are added；When slag temperature is 1610-1630 DEG C after tapping, the pig iron is added
1.5-1.8 ton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510594940.2A CN106544463B (en) | 2015-09-17 | 2015-09-17 | A kind of method for maintaining converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510594940.2A CN106544463B (en) | 2015-09-17 | 2015-09-17 | A kind of method for maintaining converter |
Publications (2)
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| CN106544463A true CN106544463A (en) | 2017-03-29 |
| CN106544463B CN106544463B (en) | 2018-12-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034787A (en) * | 2017-11-17 | 2018-05-15 | 河钢股份有限公司承德分公司 | A kind of method using magnetic separation slag iron to half steel steelmaking converter furnace retaining |
| CN108676956A (en) * | 2018-06-12 | 2018-10-19 | 山东泰山钢铁集团有限公司 | A kind of on-line maintenance method of oxygen top-blown converter furnace bottom |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776312A (en) * | 2012-07-24 | 2012-11-14 | 黑龙江建龙钢铁有限公司 | Converter protecting method |
| CN102888486A (en) * | 2012-09-17 | 2013-01-23 | 宣化钢铁集团有限责任公司 | Converter slag iron furnace protecting technology |
-
2015
- 2015-09-17 CN CN201510594940.2A patent/CN106544463B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776312A (en) * | 2012-07-24 | 2012-11-14 | 黑龙江建龙钢铁有限公司 | Converter protecting method |
| CN102888486A (en) * | 2012-09-17 | 2013-01-23 | 宣化钢铁集团有限责任公司 | Converter slag iron furnace protecting technology |
Non-Patent Citations (1)
| Title |
|---|
| 琚泽龙 等: ""转炉渣补技术的应用与实践"", 《河南冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034787A (en) * | 2017-11-17 | 2018-05-15 | 河钢股份有限公司承德分公司 | A kind of method using magnetic separation slag iron to half steel steelmaking converter furnace retaining |
| CN108676956A (en) * | 2018-06-12 | 2018-10-19 | 山东泰山钢铁集团有限公司 | A kind of on-line maintenance method of oxygen top-blown converter furnace bottom |
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| Publication number | Publication date |
|---|---|
| CN106544463B (en) | 2018-12-04 |
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