CN109504816A - A kind of fast fettling bottom system and method - Google Patents
A kind of fast fettling bottom system and method Download PDFInfo
- Publication number
- CN109504816A CN109504816A CN201910038414.6A CN201910038414A CN109504816A CN 109504816 A CN109504816 A CN 109504816A CN 201910038414 A CN201910038414 A CN 201910038414A CN 109504816 A CN109504816 A CN 109504816A
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- China
- Prior art keywords
- furnace
- fettling
- lime stone
- output end
- fast
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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
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
- C21C5/441—Equipment used for making or repairing linings
- C21C5/443—Hot fettling; Flame gunning
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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)
Abstract
The invention discloses a kind of fast fettling bottom systems, including unprocessed dolomite feed bin and lime stone feed bin；The unprocessed dolomite feed bin and lime stone bin bottom are provided with weighing belt；The two weighing belt output end faces, the weighing belt bottom are provided with material transfer belt；The material transfer belt output end is provided with chain bucket；The chain bucket output end is equipped with high hopper；The high hopper output end is linked into the feeder pipe above converter；Its fast fettling bottom method is specific as follows: the first step, ingredient, second step, furnace bottom is mended fastly, and completing to put steel in blowing terminates that suitable lime stone and unprocessed dolomite is added into furnace from high hopper after furnace body shakes just, it is melted using furnace high-temperature and 1 minute cooling, makes the CaCO in unprocessed dolomite3It decomposes, improves MgO degree of enrichment, be sintered oversaturated MgO preferably in furnace bottom by splashing slag.Fast fettling bottom system and method for the invention；Filling time is short, is not necessarily to blowing out, influences on rhythm of production small.
Description
Technical field
The present invention relates to a kind of converter fettling bottom methods, and in particular to a kind of fast fettling bottom system and method belong to converter
Furnace bottom maintenance technology field.
Background technique
Converter bottom is the important component of converter body, and good furnace bottom state can not only guarantee that converter is normally transported
Row, can be with stability contorting converter carbon oxygen product, raising steel quality；Converter bottom is in high temperature always in smelting process, bears
Weight state, when iron water amount is on the high side, steel mill can only can be only achieved molten iron disengaging by raising rhythm of production, reduction furnace retaining time
Balance, it is ensured that the stable operation of production allows for converter bottom in this way and is in high temperature, negative pressure always, causes erosion condition serious,
Furnace bottom corrodes very fast；The method for mostly using mending material fettling bottom greatly in the prior art carries out furnace bottom maintenance, also has using filling magnesium
Carbon refractory brick blocks, pig iron and clinker condensation, filler material sintering, nitrogen-blow make the methods of furnace lining surface dross, but above-mentioned side
Method cannot be guaranteed the stability contorting of good bottom blowing permeability and molten steel composition；And such as Chinese Patent Application No.:
201710552189.9, disclose a kind of method for safeguarding converter bottom, comprising: in production gap, after converter tapping, pour out 30
~50% clinker；Control converter oxygen gun hole nitrogen envelope is in an open state；Determine that life is white according to the quantity of slag of converter terminal oxygen and clinker
Unprocessed dolomite is added in converter the weight of marble；Converter is carried on the back furnace 2~3 times, back chimney corner degree is -50 °~50 °；Furnace is carried on the back to complete
Afterwards, straight row is found into converter and stands sintering, standing sintering time is 6~10min；Converter blow splashing using high pressure N2,
Furnace lining surface forms molten slag layer；Clinker is poured out into converter；In this way, unprocessed dolomite is decomposed into the mixing of MgO and CaO at high temperature
Object, while heat reduction slag temperature is absorbed, MgO and CaO content reach saturation or supersaturation, form one layer of dystectic slag
Layer, which bonds furnace lining well and generates a large amount of bubbles, so that forming air vent channel in the slag blanket of furnace bottom, guarantees good
Bottom blowing effect, stabilize carbon oxygen product, improve the degree of purity of molten steel, and then improve steel quality；But its maintenance time compares
It is long.
Summary of the invention
To solve the above problems, can be given birth at full capacity in converter the invention proposes a kind of fast fettling bottom system and method
It produces, under no time fettling bottom and the big situation of liquid fluctuating, fettling bottom in the short time is solved by the method, guarantees furnace bottom always
In reasonable control height, furnace body maintenance quality is ensured.
Fast fettling bottom system and method for the invention, including unprocessed dolomite feed bin and lime stone feed bin；The unprocessed dolomite
Feed bin and lime stone bin bottom are provided with weighing belt；The two weighing belt output end faces, the weighing belt bottom
It is provided with material transfer belt；The material transfer belt output end is provided with chain bucket；The chain bucket output end is equipped with high hopper；
The high hopper output end is linked into the feeder pipe above converter.
As preferred embodiment, the high hopper is connected with feeder pipe by feed screw.
As preferred embodiment, the high hopper output end is equipped with weighing hopper.
A kind of fast fettling bottom method, the method are specific as follows:
The first step, ingredient, by the inside of unprocessed dolomite feed bin and lime stone feed bin unprocessed dolomite and lime stone by weigh belt
It is quantified, and quantitative unprocessed dolomite and lime stone is sent into material transfer belt and are sent to after being mixed by material transfer belt
Chain bucket send ingredient to high hopper；
Second step, furnace bottom are mended fastly, and completing to put steel in blowing terminates that suitable stone is added into furnace from high hopper after furnace body shakes just
Lime stone and unprocessed dolomite are melted and 1 minute cooling using furnace high-temperature, make the CaCO in unprocessed dolomite3It decomposes, it is rich to improve MgO
Intensity is sintered oversaturated MgO preferably in furnace bottom by splashing slag.
As preferred embodiment, after blowing is completed to put steel, 150kg- is respectively added in feeder pipe above converter
300kg unprocessed dolomite and lime stone after being sintered 1min, carry out normally splashing slag operation.
The present invention compared with prior art, fast fettling bottom system and method for the invention；When only needing 1 minute fettling
Between, the filling time is short, is not necessarily to blowing out, and small on rhythm of production influence, fettling cost of material is low, and fettling cost is small.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Specific embodiment
Fast fettling bottom system and method as shown in Figure 1, including unprocessed dolomite feed bin 1 and lime stone feed bin 2；The life is white
Marble feed bin 1 and 2 bottom of lime stone feed bin, which are provided with, weighs belt 3；The two 3 output end faces of weighing belt, the weighing
3 bottom of belt is provided with material transfer belt 4；4 output end of material transfer belt is provided with chain bucket 5；5 output end of the chain bucket peace
Equipped with high hopper 6；6 output end of high hopper is linked into the feeder pipe 7 above converter.
In another embodiment, the high hopper 6 and feeder pipe 7 are connected by feed screw 8.
In another embodiment, 6 output end of high hopper is equipped with weighing hopper (not shown).
A kind of fast fettling bottom method, the method are specific as follows:
The first step, ingredient, by the inside of unprocessed dolomite feed bin and lime stone feed bin unprocessed dolomite and lime stone by weigh belt
It is quantified, and quantitative unprocessed dolomite and lime stone is sent into material transfer belt and are sent to after being mixed by material transfer belt
Chain bucket send ingredient to high hopper；
Second step, furnace bottom are mended fastly, and completing to put steel in blowing terminates that suitable stone is added into furnace from high hopper after furnace body shakes just
Lime stone and unprocessed dolomite are melted and 1 minute cooling using furnace high-temperature, make the CaCO in unprocessed dolomite3It decomposes, it is rich to improve MgO
Intensity is sintered oversaturated MgO preferably in furnace bottom by splashing slag.
In another embodiment, after blowing is completed to put steel, it is raw that 150kg-300kg is respectively added in feeder pipe above converter
Dolomite and lime stone after being sintered 1min, carry out normally splashing slag operation.
Above-described embodiment is only better embodiment of the invention, therefore all according to structure described in present patent application range
It makes, the equivalent change or modification that feature and principle are done, is included in the scope of the patent application of the present invention.
Claims (5)
1. a kind of fast fettling bottom system, it is characterised in that: including unprocessed dolomite feed bin and lime stone feed bin；The unprocessed dolomite material
Storehouse and lime stone bin bottom are provided with weighing belt；The two weighing belt output end faces, the weighing belt bottom are set
It is equipped with material transfer belt；The material transfer belt output end is provided with chain bucket；The chain bucket output end is equipped with high hopper；Institute
State the feeder pipe that high hopper output end is linked into above converter.
2. fast fettling bottom system according to claim 1, it is characterised in that: the high hopper and feeder pipe pass through feeding
Screw rod connection.
3. fast fettling bottom system according to claim 1, it is characterised in that: the high hopper output end is equipped with metering
Bucket.
4. a kind of fast fettling bottom method, it is characterised in that；The method is specific as follows:
The first step, ingredient, by the inside of unprocessed dolomite feed bin and lime stone feed bin unprocessed dolomite and lime stone by weigh belt
It is quantified, and quantitative unprocessed dolomite and lime stone is sent into material transfer belt and are sent to after being mixed by material transfer belt
Chain bucket send ingredient to high hopper；
Second step, furnace bottom are mended fastly, and completing to put steel in blowing terminates that suitable stone is added into furnace from high hopper after furnace body shakes just
Lime stone and unprocessed dolomite are melted and 1 minute cooling using furnace high-temperature, make the CaCO in unprocessed dolomite3It decomposes, it is rich to improve MgO
Intensity is sintered oversaturated MgO preferably in furnace bottom by splashing slag.
5. fast fettling bottom method according to claim 4, it is characterised in that: the furnace bottom is mended fastly specifically: is being blown
After Cheng Fanggang, 150kg-300kg unprocessed dolomite and lime stone is respectively added in feeder pipe above converter, after being sintered 1min, into
Row normally splashes slag operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038414.6A CN109504816A (en) | 2019-01-16 | 2019-01-16 | A kind of fast fettling bottom system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038414.6A CN109504816A (en) | 2019-01-16 | 2019-01-16 | A kind of fast fettling bottom system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109504816A true CN109504816A (en) | 2019-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910038414.6A Pending CN109504816A (en) | 2019-01-16 | 2019-01-16 | A kind of fast fettling bottom system and method |
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| Country | Link |
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| CN (1) | CN109504816A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835668A (en) * | 2019-11-20 | 2020-02-25 | 盐城市联鑫钢铁有限公司 | Efficient furnace protection method |
| CN114737015A (en) * | 2022-04-13 | 2022-07-12 | 南京钢铁股份有限公司 | Novel furnace repairing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660658A (en) * | 2012-05-23 | 2012-09-12 | 河北省首钢迁安钢铁有限责任公司 | Method for curing converter slag |
| CN103467071A (en) * | 2013-09-11 | 2013-12-25 | 江苏永钢集团有限公司 | Fettling sand for maintaining furnace condition of converter and method for maintaining furnace condition of converter |
| CN203473818U (en) * | 2013-08-30 | 2014-03-12 | 江苏申源特钢有限公司 | Leakage-preventive AOD (argon oxygen decarburization) feeding device |
| CN104388625A (en) * | 2014-11-13 | 2015-03-04 | 武汉钢铁(集团)公司 | Method for reducing solvent consumption under slag remaining condition of converter |
| CN106191370A (en) * | 2016-08-12 | 2016-12-07 | 唐山市德龙钢铁有限公司 | A kind of maintaining method of converter lining |
-
2019
- 2019-01-16 CN CN201910038414.6A patent/CN109504816A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660658A (en) * | 2012-05-23 | 2012-09-12 | 河北省首钢迁安钢铁有限责任公司 | Method for curing converter slag |
| CN203473818U (en) * | 2013-08-30 | 2014-03-12 | 江苏申源特钢有限公司 | Leakage-preventive AOD (argon oxygen decarburization) feeding device |
| CN103467071A (en) * | 2013-09-11 | 2013-12-25 | 江苏永钢集团有限公司 | Fettling sand for maintaining furnace condition of converter and method for maintaining furnace condition of converter |
| CN104388625A (en) * | 2014-11-13 | 2015-03-04 | 武汉钢铁(集团)公司 | Method for reducing solvent consumption under slag remaining condition of converter |
| CN106191370A (en) * | 2016-08-12 | 2016-12-07 | 唐山市德龙钢铁有限公司 | A kind of maintaining method of converter lining |
Non-Patent Citations (1)
| Title |
|---|
| 王庆春: "《冶金通用机械与冶炼设备》", 29 February 2004, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835668A (en) * | 2019-11-20 | 2020-02-25 | 盐城市联鑫钢铁有限公司 | Efficient furnace protection method |
| CN114737015A (en) * | 2022-04-13 | 2022-07-12 | 南京钢铁股份有限公司 | Novel furnace repairing method |
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