CN104894327A - Converter slag surface furnace lining fettling method - Google Patents
Converter slag surface furnace lining fettling method Download PDFInfo
- Publication number
- CN104894327A CN104894327A CN201510314283.1A CN201510314283A CN104894327A CN 104894327 A CN104894327 A CN 104894327A CN 201510314283 A CN201510314283 A CN 201510314283A CN 104894327 A CN104894327 A CN 104894327A
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- slag
- converter
- furnace lining
- temperature adjustment
- steel scrap
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- Y02P10/212—
Abstract
The invention discloses a converter slag surface furnace lining fettling method. The method comprises the following steps: (1) the heat of converter end point carbon not less than 0.08% is selected; (2) after the converter tapping is finished, a converter is inclined to the slag surface side, so that added temperature-adjustable waste steel rightly drops and fills at a slag feeding part; (3) the converter is continuously inclined to the slag surface side; when furnace slag slightly flows out from a mouth of the converter, the rotation of the converter is stopped; and in the process of the furnace slag at the bottom of the converter flowing to the furnace mouth along a slag surface furnace lining, the furnace slag covers the slag feeding part filled with the temperature-variable waste steel, and the temperature-variable waste steel at the slag feeding part is sintered; (5) the temperature-variable waste steel is sintered for 2-4 minutes by the furnace slag; (6) the heat converter is shaken forwards, so that the furnace slag flows back to the bottom of the converter; (7) the nitrogen slag splashing furnace protection is performed; and (8) after the nitrogen slag splashing furnace protection is finished for 8 hours, the steps (2-8) are repeated. The method has the advantages of short fettling time and good fettling effect.
Description
Technical field
The present invention relates to 50 ~ 120 tons of Converter condition area of maintenance, be specifically related to converter top of the slag furnace lining fettling method.
Background technology
The structure of converter is: comprise body of heater, and the top of body of heater is provided with fire door, and the inwall of body of heater is equipped with furnace lining, and the upper portion side wall of body of heater is provided with out the converter taphole of molten steel.In steel-making industry, the general inboard wall of furnace body faced by converter taphole is called the top of the slag, when converter needs to add the blowing of temperature adjustment steel scrap hot metal charging, converter is shaken to reinforced station to top of the slag side, now temperature adjustment steel scrap just in time drops down onto converter top of the slag furnace lining from converter mouth, then bottom the downward landing to converter of top of the slag furnace lining; When converter need go out molten steel, converter shaken to converter taphole side to tapping water conservancy project position, the molten steel now in converter is just in time poured out from converter taphole; When converter needs to carry out nitrogen slag splashing, then converter is just being shaken (shake positive status and refer to that the angle between the axis of converter and vertical line is 0 °, and the angle angle between the axis of converter and vertical line is also referred to as grate angle).In converter steelmaking process, converter top of the slag furnace lining be very easily etched under the Conditionings such as physical damage, chemical reaction, high temperature oxidation damage and thinning, for guaranteeing that the Rational Thickness of furnace lining can reach the object of safety in production, need regularly to use resistance to material to carry out repair maintenance to converter top of the slag furnace lining, the shortcoming of the resistance to material of above-mentioned use to the method that converter top of the slag furnace lining is repaired is: must blowing out and furnace outage time is longer during (1) fettling complex operation, filling time long, repair maintenance, and then greatly reduces working efficiency; (2) consumption of resistance to material is large, considerably increases the production and application cost of enterprise.
Summary of the invention
The object of this invention is to provide a kind of do not use resistance to material just can complete converter top of the slag furnace lining repair maintenance and the effective converter top of the slag furnace lining fettling method of fettling.
For achieving the above object, present invention employs following technical scheme: described converter top of the slag furnace lining fettling method, comprises the following steps:
(1) heat of converter terminal carbon >=0.08% is first selected;
(2) after the converter tapping of this heat terminates, the converter of this heat is rolled tiltedly to the top of the slag, converter rolls the grate angle tiltedly to the top of the slag and guarantees that the temperature adjustment steel scrap added from converter mouth just in time can drop down onto the need benefit slag position of top of the slag furnace lining, then add temperature adjustment steel scrap, slag position mended by the need that the add-on of temperature adjustment steel scrap guarantees to fill up top of the slag furnace lining;
(3) then the converter of this heat is continued to tilt to the top of the slag side converter that to stop operating when converter mouth has slag to flow out slightly, in the process that the slag of converter bottom flows along top of the slag furnace lining to fire door, slag can cover the need filling up temperature adjustment steel scrap and mends slag position and sinter the temperature adjustment steel scrap need mending slag position;
(5) slag is made to sinter 2 ~ 4 minutes to the temperature adjustment steel scrap need mending slag position;
(6) then this heat converter is just shaken, make slag be back to bottom converter;
(7) then carry out nitrogen slag splashing, make slag hang over top of the slag furnace lining and be sintered to fix on the temperature adjustment steel scrap need mending slag position;
(8) (2) ~ (8) step within 8 hours after nitrogen slag splashing terminates, is repeated again.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: after converter tapping terminates, it is 68 ~ 72 ° that the converter of this heat is tilted to grate angle to top of the slag side, and slag position mended by the need making the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto top of the slag furnace lining.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: after converter tapping terminates, when mending slag position and be positioned at top of the slag furnace lining top, it is 72 ° that converter is tilted to grate angle to top of the slag side, makes the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: after converter tapping terminates, when mending slag position and be positioned in the middle part of top of the slag furnace lining, it is 70 ° that converter is tilted to grate angle to top of the slag side, makes the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: after converter tapping terminates, when mending slag position and be positioned at top of the slag furnace lining bottom, it is 68 ° that converter is tilted to grate angle to top of the slag side, makes the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: after temperature adjustment steel scrap fills up the need benefit slag position of top of the slag furnace lining, the converter of this heat being continued to tilt to grate angle to top of the slag side is 95 ~ 110 °, and stop operating when making converter mouth slightly have slag to flow out converter.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: the add-on of temperature adjustment steel scrap is 0.9 ~ 1.1 ton.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: the add-on of temperature adjustment steel scrap is 1 ton.
Further, aforesaid converter top of the slag furnace lining fettling method, wherein: the sintering time of slag to the temperature adjustment steel scrap need mending slag position is 3 minutes.
By the enforcement of technique scheme, the invention has the beneficial effects as follows: (1) fettling is easy to operate, the filling time is short and fettling is effective, as long as fettling operation within 2 ~ 4 minutes, just can be completed, thus can not cause too large impact to converter producing, substantially increase working efficiency; (2) adopt temperature adjustment steel scrap to carry out repair maintenance to converter top of the slag furnace lining, greatly reduce the production and application cost of enterprise.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment one
Converter top of the slag furnace lining fettling method, comprises the following steps:
(1) heat of converter terminal carbon >=0.08% is first selected;
(2) after the converter tapping of this heat terminates, when slag position need be mended be positioned at top of the slag furnace lining bottom, converter is tilted to grate angle to top of the slag side be 68 °, make the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position, then add 0.9 ton of temperature adjustment steel scrap, the add-on of temperature adjustment steel scrap just in time can fill up top of the slag furnace lining this need mend slag position;
(3) then the converter of this heat being continued to tilt to grate angle to top of the slag side is 95 °, stop operating when making converter mouth slightly have slag to flow out converter, in the process that the slag of converter bottom flows along top of the slag furnace lining to fire door, slag can cover the need filling up temperature adjustment steel scrap and mends slag position and sinter the temperature adjustment steel scrap need mending slag position;
(5) slag is made to sinter 2 minutes to the temperature adjustment steel scrap need mending slag position;
(6) then this heat converter is just shaken, make slag be back to bottom converter;
(7) then carry out nitrogen slag splashing, make slag hang over top of the slag furnace lining and be sintered to fix on the temperature adjustment steel scrap need mending slag position;
(8) (2) ~ (8) step within 8 hours after nitrogen slag splashing terminates, is repeated again.
Embodiment two
Converter top of the slag furnace lining fettling method, comprises the following steps:
(1) heat of converter terminal carbon >=0.08% is first selected;
(2) after the converter tapping of this heat terminates, when slag position need be mended to be positioned in the middle part of top of the slag furnace lining, converter is tilted to grate angle to top of the slag side be 70 °, make the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position, then 1 ton of temperature adjustment steel scrap is added, the add-on of temperature adjustment steel scrap just in time can be filled up this and need mend slag position;
(3) then the converter of this heat being continued to tilt to grate angle to top of the slag side is 100 °, stop operating when making converter mouth slightly have slag to flow out converter, in the process that the slag of converter bottom flows along top of the slag furnace lining to fire door, slag can cover the need filling up temperature adjustment steel scrap and mends slag position and sinter the temperature adjustment steel scrap need mending slag position;
(5) slag is made to sinter 3 minutes to the temperature adjustment steel scrap need mending slag position;
(6) then this heat converter is just shaken, make slag be back to bottom converter;
(7) then carry out nitrogen slag splashing, make slag hang over top of the slag furnace lining and be sintered to fix on the temperature adjustment steel scrap need mending slag position;
(8) (2) ~ (8) step within 8 hours after nitrogen slag splashing terminates, is repeated again.
Embodiment three
Converter top of the slag furnace lining fettling method, comprises the following steps:
(1) heat of converter terminal carbon >=0.08% is first selected;
(2) after the converter tapping of this heat terminates, when slag position need be mended be positioned at top of the slag furnace lining top, converter is tilted to grate angle to top of the slag side be 72 °, make the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position, then 1.1 tons of temperature adjustment steel scraps are added, the add-on of temperature adjustment steel scrap just in time can be filled up this and need mend slag position;
(3) then the converter of this heat being continued to tilt to grate angle to top of the slag side is 110 °, stop operating when making converter mouth slightly have slag to flow out converter, in the process that the slag of converter bottom flows along top of the slag furnace lining to fire door, slag can cover the need filling up temperature adjustment steel scrap and mends slag position and sinter the temperature adjustment steel scrap need mending slag position;
(5) slag is made to sinter 4 minutes to the temperature adjustment steel scrap need mending slag position;
(6) then this heat converter is just shaken, make slag be back to bottom converter;
(7) then carry out nitrogen slag splashing, make slag hang over top of the slag furnace lining and be sintered to fix on the temperature adjustment steel scrap need mending slag position;
(8) (2) ~ (8) step within 8 hours after nitrogen slag splashing terminates, is repeated again.
Advantage of the present invention is: (1) fettling is easy to operate, the filling time is short and fettling is effective, as long as within 2 ~ 4 minutes, just can complete fettling operation, thus can not cause too large impact to converter producing, substantially increase working efficiency; (2) adopt temperature adjustment steel scrap to carry out repair maintenance to converter top of the slag furnace lining, greatly reduce the production and application cost of enterprise.
Claims (9)
1. converter top of the slag furnace lining fettling method, is characterized in that: comprise the following steps:
(1) heat of converter terminal carbon >=0.08% is first selected;
(2) after the converter tapping of this heat terminates, the converter of this heat is rolled tiltedly to the top of the slag, converter rolls the grate angle tiltedly to the top of the slag and guarantees that the temperature adjustment steel scrap added from converter mouth just in time can drop down onto the need benefit slag position of top of the slag furnace lining, then add temperature adjustment steel scrap, slag position mended by the need that the add-on of temperature adjustment steel scrap guarantees to fill up top of the slag furnace lining;
(3) then the converter of this heat is continued to tilt to the top of the slag side converter that to stop operating when converter mouth has slag to flow out slightly, in the process that the slag of converter bottom flows along top of the slag furnace lining to fire door, slag can cover the need filling up temperature adjustment steel scrap and mends slag position and sinter the temperature adjustment steel scrap need mending slag position;
(5) slag is made to sinter 2 ~ 4 minutes to the temperature adjustment steel scrap need mending slag position;
(6) then this heat converter is just shaken, make slag be back to bottom converter;
(7) then carry out nitrogen slag splashing, make slag hang over top of the slag furnace lining and be sintered to fix on the temperature adjustment steel scrap need mending slag position;
(8) (2) ~ (8) step within 8 hours after nitrogen slag splashing terminates, is repeated again.
2. converter top of the slag furnace lining fettling method according to claim 1, it is characterized in that: after converter tapping terminates, it is 68 ~ 72 ° that the converter of this heat is tilted to grate angle to top of the slag side, and slag position mended by the need making the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto top of the slag furnace lining.
3. converter top of the slag furnace lining fettling method according to claim 2, it is characterized in that: after converter tapping terminates, when slag position need be mended be positioned at top of the slag furnace lining top, it is 72 ° that converter is tilted to grate angle to top of the slag side, makes the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position.
4. converter top of the slag furnace lining fettling method according to claim 2, it is characterized in that: after converter tapping terminates, when slag position need be mended to be positioned in the middle part of top of the slag furnace lining, it is 70 ° that converter is tilted to grate angle to top of the slag side, makes the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position.
5. converter top of the slag furnace lining fettling method according to claim 2, it is characterized in that: after converter tapping terminates, when slag position need be mended be positioned at top of the slag furnace lining bottom, it is 68 ° that converter is tilted to grate angle to top of the slag side, makes the temperature adjustment steel scrap adding converter from converter mouth just in time can drop down onto this and need mend slag position.
6. converter top of the slag furnace lining fettling method according to claim 1, it is characterized in that: after temperature adjustment steel scrap fills up the need benefit slag position of top of the slag furnace lining, the converter of this heat being continued to tilt to grate angle to top of the slag side is 95 ~ 110 °, and stop operating when making converter mouth slightly have slag to flow out converter.
7. converter top of the slag furnace lining fettling method according to claim 1, is characterized in that: the add-on of temperature adjustment steel scrap is 0.9 ~ 1.1 ton.
8. converter top of the slag furnace lining fettling method according to claim 7, is characterized in that: the add-on of temperature adjustment steel scrap is 1 ton.
9. converter top of the slag furnace lining fettling method according to claim 1, is characterized in that: the sintering time of slag to the temperature adjustment steel scrap need mending slag position is 3 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314283.1A CN104894327A (en) | 2015-06-10 | 2015-06-10 | Converter slag surface furnace lining fettling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314283.1A CN104894327A (en) | 2015-06-10 | 2015-06-10 | Converter slag surface furnace lining fettling method |
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| CN104894327A true CN104894327A (en) | 2015-09-09 |
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| CN201510314283.1A Pending CN104894327A (en) | 2015-06-10 | 2015-06-10 | Converter slag surface furnace lining fettling method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671242A (en) * | 2016-03-16 | 2016-06-15 | 山东钢铁股份有限公司 | Maintenance method for converter lining |
| CN107419051A (en) * | 2017-08-23 | 2017-12-01 | 华北理工大学 | Promote the smelting process of converter scrap melting using the dephosphorized slag that gasifies |
| CN107674937A (en) * | 2017-10-25 | 2018-02-09 | 山东泰山钢铁集团有限公司 | By splashing after slag the method for adding slag making auxiliary material and safeguarding converter charging face and furnace lining |
| 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 |
| CN108660282A (en) * | 2018-03-29 | 2018-10-16 | 马鞍山钢铁股份有限公司 | A kind of converter deslagging face furnace lining Rapid Maintenance Method |
| CN108660276A (en) * | 2017-03-29 | 2018-10-16 | 鞍钢股份有限公司 | A kind of converter is let cool and secondary blow-in method |
| CN109825667A (en) * | 2019-02-22 | 2019-05-31 | 常熟市龙腾特种钢有限公司 | A kind of quick converter fettling method |
| CN113930577A (en) * | 2021-08-30 | 2022-01-14 | 山东钢铁集团日照有限公司 | Maintenance method for converter lining in later furnace life |
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| CN104032066A (en) * | 2014-05-22 | 2014-09-10 | 萍乡萍钢安源钢铁有限公司 | Process for maintaining converter lining by combining metal material with heat-state furnace slag |
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| CN102719603A (en) * | 2011-03-30 | 2012-10-10 | 鞍钢股份有限公司 | Slag-groveling-type fettling method |
| 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 |
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| CN104032066A (en) * | 2014-05-22 | 2014-09-10 | 萍乡萍钢安源钢铁有限公司 | Process for maintaining converter lining by combining metal material with heat-state furnace slag |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671242A (en) * | 2016-03-16 | 2016-06-15 | 山东钢铁股份有限公司 | Maintenance method for converter lining |
| CN108660276A (en) * | 2017-03-29 | 2018-10-16 | 鞍钢股份有限公司 | A kind of converter is let cool and secondary blow-in method |
| CN108660276B (en) * | 2017-03-29 | 2019-10-29 | 鞍钢股份有限公司 | A kind of converter is let cool and secondary blow-in method |
| CN107419051A (en) * | 2017-08-23 | 2017-12-01 | 华北理工大学 | Promote the smelting process of converter scrap melting using the dephosphorized slag that gasifies |
| CN107674937A (en) * | 2017-10-25 | 2018-02-09 | 山东泰山钢铁集团有限公司 | By splashing after slag the method for adding slag making auxiliary material and safeguarding converter charging face and furnace lining |
| 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 |
| CN108660282A (en) * | 2018-03-29 | 2018-10-16 | 马鞍山钢铁股份有限公司 | A kind of converter deslagging face furnace lining Rapid Maintenance Method |
| CN109825667A (en) * | 2019-02-22 | 2019-05-31 | 常熟市龙腾特种钢有限公司 | A kind of quick converter fettling method |
| CN113930577A (en) * | 2021-08-30 | 2022-01-14 | 山东钢铁集团日照有限公司 | Maintenance method for converter lining in later furnace life |
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Application publication date: 20150909 |
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