CN106544463B - A kind of method for maintaining converter - Google Patents
A kind of method for maintaining converter Download PDFInfo
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- CN106544463B CN106544463B CN201510594940.2A CN201510594940A CN106544463B CN 106544463 B CN106544463 B CN 106544463B CN 201510594940 A CN201510594940 A CN 201510594940A CN 106544463 B CN106544463 B CN 106544463B
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- slag
- pig iron
- converter
- tapping
- clinker
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Abstract
The present invention provides a kind of method for maintaining converter, and being poured into converter finishing slag using the pig iron makes clinker rapid cooling, and the last pig iron, which is rolled in clinker, to be pasted on furnace lining, achievees the purpose that furnace retaining.Compared with prior art; the beneficial effects of the present invention are: after using method charging furnace retaining of the invention; the pig iron and clinker can continue to keep 6 furnaces or more meeting untouchable furnace retaining effect; completely instead of using magnesia big face mending material to carry out the method for meeting untouchable fettling, achieve the purpose that environmental protection while improving maintaining converter effect.In addition the method for the present invention is simple, at low cost, and the maintaining converter operating time is short, and the furnace retaining period is long, is conducive to improve production efficiency.
Description
Technical field
The present invention relates to field of metallurgy, in particular to a kind of method for maintaining converter.
Background technique
Converter is most fast position of deteriorating in entire steelmaking process, and influences the crucial ring in entire furnace labour period
Section.In the prior art converter for entire furnace lining maintenance using slag splashing method, the method for maintaining converter for
Charging side mainly uses the big face mending material of magnesia class, is sintered using converter lining heat to mending material, utilization is sintered
Mending material reduces the impact to furnace lining.
Magnesia class mending material can make converter using pitch as binder during production in the method for slag splashing
Suspended matter in water in dust removal severely exceeds, and will ultimately result in serious environmental pollution.
Summary of the invention
The object of the present invention is to provide a kind of method for maintaining converter, and being poured into converter finishing slag using the pig iron keeps clinker rapidly cold
But, the last pig iron, which is rolled in clinker, pastes on furnace lining, achievees the purpose that furnace retaining.After method charging furnace retaining of the invention,
The pig iron and clinker can continue to keep 6 furnaces or more meeting untouchable furnace retaining effect, completely instead of using magnesia big face mending material
The method for carrying out meeting untouchable fettling achievees the purpose that environmental protection while improving maintaining converter effect.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of method for maintaining converter, the pig iron, which is poured into converter finishing slag, makes clinker rapid cooling, and the last pig iron is rolled in clinker
In paste on furnace lining, achieve the purpose that furnace retaining, steps are as follows for specific method:
1) after tapping, the pig iron is ploughed under in liquid slag in 3min, the pig iron is ploughed under and meets iron direction backward for converter
It shakes to level；
2) residence time after converter is shaken to level are as follows: when slag temperature is 1650-1670 DEG C after tapping, stop 13-
15min；When slag temperature is 1630-1650 DEG C after tapping, 10-13min is stopped；Slag temperature is 1610- after tapping
At 1630 DEG C, 7-10min is stopped；
3) pig iron is poured into converter, shake to level stop it is cooling after, converter is shaken to carrying out splashing slag vertically, slag pressure 1.1- is splashed
1.4MPa；Splash the slag time are as follows: when slag temperature is 1650-1670 DEG C after tapping, splash slag 2.5-3.0min；Clinker after tapping
When temperature is 1630-1650 DEG C, slag 2.2-2.5min is splashed；When slag temperature is 1610-1630 DEG C after tapping, slag 2.0- is splashed
2.3min；
4) operation of falling slag is carried out after splashing slag, floating clinker in furnace is all poured into slag ladle.
The pig iron ingredient are as follows: C:3.7%-4.5%, Si:0.20%-0.80%, Mn:0.05%-0.35%, P:<
0.090%, S:< 0.060%, remaining is iron and inevitable impurity.
The pig iron usage amount are as follows: when slag temperature is 1650-1670 DEG C after tapping, be added pig iron 2.0-2.2 tons；
When slag temperature is 1630-1650 DEG C after tapping, it is added pig iron 1.8-2.0 tons；Slag temperature is 1610-1630 after tapping
DEG C when, be added pig iron 1.5-1.8 tons.
Compared with prior art, the beneficial effects of the present invention are:
A kind of method for maintaining converter, being poured into converter finishing slag using the pig iron makes clinker rapid cooling, and the last pig iron is rolled in furnace
It is pasted on furnace lining in slag, achievees the purpose that furnace retaining.Fed after furnace retaining using method of the invention, the pig iron and clinker meet it is untouchable
Furnace retaining effect can continue keep 6 furnaces more than, completely instead of the side for using magnesia big face mending material meet untouchable fettling
Method achievees the purpose that environmental protection while improving maintaining converter effect.In addition the method for the present invention is simple, at low cost, converter
The furnace retaining operating time is short, and the furnace retaining period is long, is conducive to improve production efficiency.
Specific embodiment
The present invention is described in detail below, it should be noted that implementation of the invention embodiment party not limited to the following
Formula.
A kind of method for maintaining converter, the pig iron, which is poured into converter finishing slag, makes clinker rapid cooling, and the last pig iron is rolled in clinker
In paste on furnace lining, achieve the purpose that furnace retaining, steps are as follows for specific method:
1) after tapping, the pig iron is ploughed under in liquid slag in 3min, the pig iron is ploughed under and meets iron direction backward for converter
It shakes to level；
2) residence time after converter is shaken to level are as follows: when slag temperature is 1650-1670 DEG C after tapping, stop 13-
15min；When slag temperature is 1630-1650 DEG C after tapping, 10-13min is stopped；Slag temperature is 1610- after tapping
At 1630 DEG C, 7-10min is stopped；
3) pig iron is poured into converter, shake to level stop it is cooling after, converter is shaken to carrying out splashing slag vertically, slag pressure 1.1- is splashed
1.4MPa；Splash the slag time are as follows: when slag temperature is 1650-1670 DEG C after tapping, splash slag 2.5-3.0min；Clinker after tapping
When temperature is 1630-1650 DEG C, slag 2.2-2.5min is splashed；When slag temperature is 1610-1630 DEG C after tapping, slag 2.0- is splashed
2.3min；
4) operation of falling slag is carried out after splashing slag, floating clinker in furnace is all poured into slag ladle.
The pig iron ingredient are as follows: C:3.7%-4.5%, Si:0.20%-0.80%, Mn:0.05%-0.35%, P:<
0.090%, S:< 0.060%, remaining is iron and inevitable impurity.
The pig iron usage amount are as follows: when slag temperature is 1650-1670 DEG C after tapping, be added pig iron 2.0-2.2 tons；
When slag temperature is 1630-1650 DEG C after tapping, it is added pig iron 1.8-2.0 tons；Slag temperature is 1610-1630 after tapping
DEG C when, be added pig iron 1.5-1.8 tons.
A kind of method for maintaining converter of the present invention, 6 furnaces are a furnace retaining period, i.e., after 6 furnaces of converter circulation production, into
The operation of the primary method for maintaining converter as described above of row.
Heretofore described method is specifically described below by specific embodiment.
Embodiment 1:
1) it takes the pig iron to pour into liquid slag, cools down for liquid slag, pig iron ingredient: C:3.7%, Si:0.20%,
Mn:0.05%, P:< 0.090%, S:< 0.060%.
2) pig iron usage amount: 1650-1670 DEG C of slag temperature after tapping is added 2.0 tons of the pig iron.
3) after tapping, the pig iron is ploughed under in liquid slag in 3min, the pig iron is ploughed under and meets iron direction backward for converter
It shakes to level.
4) residence time after converter is shaken to level: 1650-1670 DEG C of slag temperature after tapping stops 13-15min.
5) pig iron is poured into converter, shake to level stop it is cooling after, converter is shaken to carrying out splashing slag vertically, slag pressure 1.1- is splashed
1.4MPa.Splash the slag time: 1650-1670 DEG C of slag temperature after tapping splashes slag 2.5-3.0min.
6) operation of falling slag is carried out after splashing slag, floating clinker in furnace is all poured into slag ladle.
Embodiment 2:
1) it takes the pig iron to pour into liquid slag, cools down for liquid slag, pig iron ingredient: C:4.5%, Si:0.80%,
Mn:0.35%, P:< 0.090%, S:< 0.060%.
2) pig iron usage amount: 1630-1650 DEG C of slag temperature after tapping is added 1.8 tons of the pig iron.
3) after tapping, the pig iron is ploughed under in liquid slag in 3min, the pig iron is ploughed under and meets iron direction backward for converter
It shakes to level.
4) residence time after converter is shaken to level: 1630-1650 DEG C of slag temperature after tapping stops 10-13min.
5) pig iron is poured into converter, shake to level stop it is cooling after, converter is shaken to carrying out splashing slag vertically, slag pressure 1.1- is splashed
1.4MPa.Splash the slag time: 1630-1650 DEG C of slag temperature after tapping splashes slag 2.2-2.5min.
6) operation of falling slag is carried out after splashing slag, floating clinker in furnace is all poured into slag ladle.
Embodiment 3:
1) it takes the pig iron to pour into liquid slag, cools down for liquid slag, pig iron ingredient: C:4.0%, Si:0.5%, Mn:
0.2%, P:< 0.090%, S:< 0.060%.
2) pig iron usage amount: 1610-1630 DEG C of slag temperature after tapping is added 1.5 tons of the pig iron.
3) after tapping, the pig iron is ploughed under in liquid slag in 3min, the pig iron is ploughed under and meets iron direction backward for converter
It shakes to level.
4) residence time after converter is shaken to level: 1610-1630 DEG C of slag temperature after tapping stops 7-10min.
5) pig iron is poured into converter, shake to level stop it is cooling after, converter is shaken to carrying out splashing slag vertically, slag pressure 1.1- is splashed
1.4MPa.Splash the slag time: 1610-1630 DEG C of slag temperature after tapping splashes slag 2.0-2.3min.
6) operation of falling slag is carried out after splashing slag, floating clinker in furnace is all poured into slag ladle.
Claims (3)
1. a kind of method for maintaining converter, which is characterized in that pouring into the pig iron in converter finishing slag makes clinker rapid cooling, the last pig iron
It is rolled in clinker and pastes on furnace lining, achieve the purpose that furnace retaining, steps are as follows for specific method:
1) tap after, the pig iron is ploughed under in liquid slag in 3min, plough under the pig iron meet backward iron direction by converter shake to
It is horizontal；
2) residence time after converter is shaken to level are as follows: when slag temperature is 1650-1670 DEG C after tapping, stop 13-15min；
When slag temperature is 1630-1650 DEG C after tapping, 10-13min is stopped；When slag temperature is 1610-1630 DEG C after tapping,
Stop 7-10min；
3) pig iron is poured into converter, shake to level stop it is cooling after, converter is shaken to carrying out splashing slag vertically, slag pressure 1.1- is splashed
1.4MPa；Splash the slag time are as follows: when slag temperature is 1650-1670 DEG C after tapping, splash slag 2.5-3.0min；Clinker after tapping
When temperature is 1630-1650 DEG C, slag 2.2-2.5min is splashed；When slag temperature is 1610-1630 DEG C after tapping, slag 2.0- is splashed
2.3min；
4) operation of falling slag is carried out after splashing slag, floating clinker in furnace is all poured into slag ladle；
6 furnaces are a furnace retaining period, i.e., after 6 furnaces of converter circulation production, carry out the behaviour of primary method for maintaining converter as described above
Make.
2. a kind of method for maintaining converter according to claim 1, which is characterized in that the pig iron ingredient are as follows: C:3.7%-
4.5%, Si:0.20%-0.80%, Mn:0.05%-0.35%, P:< 0.090%, S:< 0.060%, remaining is for iron and not
Evitable impurity.
3. a kind of method for maintaining converter according to claim 1, which is characterized in that the pig iron usage amount are as follows: when out
When slag temperature is 1650-1670 DEG C after steel, it is added pig iron 2.0-2.2 tons；Slag temperature is 1630-1650 DEG C after tapping
When, it is added pig iron 1.8-2.0 tons；When slag temperature is 1610-1630 DEG C after tapping, it is added pig iron 1.5-1.8 tons.
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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510594940.2A CN106544463B (en) | 2015-09-17 | 2015-09-17 | A kind of method for maintaining converter |
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| CN106544463A CN106544463A (en) | 2017-03-29 |
| CN106544463B true CN106544463B (en) | 2018-12-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
|---|
| "转炉渣补技术的应用与实践";琚泽龙 等;《河南冶金》;20120630;第20卷(第3期);第30-31、53页 * |
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