CN102851430A - Maintenance method for converter lining - Google Patents
Maintenance method for converter lining Download PDFInfo
- Publication number
- CN102851430A CN102851430A CN2011101798316A CN201110179831A CN102851430A CN 102851430 A CN102851430 A CN 102851430A CN 2011101798316 A CN2011101798316 A CN 2011101798316A CN 201110179831 A CN201110179831 A CN 201110179831A CN 102851430 A CN102851430 A CN 102851430A
- Authority
- CN
- China
- Prior art keywords
- slag
- converter
- tapping
- furnace
- lining
- 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.)
- Pending
Links
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention involves a maintenance method for the converter lining. The method is characterized in that: during the process of converter turndown for sampling, standing for tapping or taping, spray repair operation and/or manual feed repair operation is performed to the part of the furnace lining not covered by steel slag, and modification to the slag is not required to be performed during the slag splashing furnace maintenance process performed after tapping is finished. Compared with the prior art, the method has the advantageous effects that: a part of spray repair material or feed repair material adheres on the furnace lining, increases the thickness of the slag splashing layer, and has effect on furnace lining protection, and the rest spray repair material or feed repair material enters into the slag, is molten under the high temperature action of the slag; and since the spray repair material or feed repair material has higher MgO content, the slag viscosity can be remarkably increased, so that slag modification is not required to be performed during the slag splashing furnace maintenance process after the following tapping is finished, and under the condition that slag splashing furnace maintenance time is remarkably shortened, the slag splashing effect is still superior to that the modified slag not adopting the process, in addition, adoption of the process has no need of shutdown of the furnace, so that the converter operating rate can be remarkably improved.
Description
Technical field
The present invention relates to the metallic substance technical field, relate in particular to a kind of maintaining method of converter lining.
Background technology
The maintaining method of converter current furnace lining mainly contains large fettling, manually throws benefit, spray repair, slag splashing, wherein take large fettling as main, large fettling technique is to utilize the groove mode of turning over to add converter large face mending material, by grate large fabric is layered on two large faces of thing, then natural sintering or logical oxygen sintering, thereby protection furnace lining; The artificial benefit technique of throwing refers to mend at the furnace lining weak part with manually mending material being thrown; Gunning technology is the weak part that Gunning refractory is sprayed on furnace lining by spray gun, thus the protection furnace lining; Slag splashing is after converter tapping finishes, and adopts high pressure nitrogen that the slag of high MgO content is spattered on furnace lining, thus the protection furnace lining.
In the actual production process, manually throw benefit, spray repair, three kinds of fettling techniques of slag splashing and carry out separately, wherein gunning technology and artificial the throwing are mended technique and are needed carry out when converter blowing out or large fettling; Need during slag splashing first slag to be carried out upgrading, when converter smelting soft steel ratio increased, therefore converter finishing slag viscosity less generally needed to add a certain amount of modification agent that contains MgO, causes the slag splashing time longer, and production efficiency is lower.
Existing patented technology 200410155524.4, a kind of self patching method for rotary furnace lining is disclosed, the method comprises reserves slag and cooling sintering step, the cooling sintering is that the converter that will contain above-mentioned slag is added steel scrap in it when being turned back to the pre-determined tilt angle, at least waggle is once along the plane at place with the converter of tilting again, so that slag can be lining with interior by sintering after the burner hearth cooling, again converter is rotated back into normal steel-making position.Add steel scrap and tilt to rotate converter to make the converter fast cooling, reserve slag and liner sintering or self-complementary in the stove thereby make, this self patching method does not need to add any equipment and raw material, but the same deficiency that increases extra furnace outage time that exists.
Summary of the invention
The purpose of this invention is to provide a kind of maintaining method of converter lining, overcome the deficiencies in the prior art, optimize the furnace lining maintenance service, reduce slag splashing time and furnace outage time, improve the converter operating rate.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of maintaining method of converter lining, fall in converter the sample such as stove, wait for and in tapping or the tapping process furnace lining do not carried out the spray repair operation by the slag covering part or artificial the throwing mended operation, and after tapping finishes, carry out the slag splashing operation, needn't carry out upgrading to slag in the slag splashing process.
A kind of maintaining method of converter lining, fall in converter the sample such as stove, wait for and in tapping or the tapping process furnace lining do not carried out the spray repair operation by the slag covering part and artificial the throwing mended operation, and after tapping finishes, carry out the slag splashing operation, needn't carry out upgrading to slag in the slag splashing process.
Spray repairing lance for tilting material spray speed control is at 1～10kgt in the described spray repair operation
-1Slag min
-1, the amount of magnesian gunning refractory is controlled at 10～30kgt
-1Slag.
The amount that magnesia throwing feed supplement in the operation is mended in described artificial throwing is controlled at 5～20kgt
-1Slag.
Magnesian gunning refractory and magnesia throwing feed supplement overall control are at 10～25kgt in described spray repair operation and the operation of artificial throwing benefit
-1Slag.
Compared with prior art; the invention has the beneficial effects as follows: a part of Gunning refractory or throwing feed supplement stick on the furnace lining; increased the thickness that spatters slag blanket; played the effect of protection furnace lining; other Gunning refractory and throwing feed supplement then enter in the slag; under the high temperature action of slag, melt rapidly; because Gunning refractory and throwing feed supplement all have higher MgO content; therefore can significantly improve the viscosity of slag; can carry out slag modification in the slag splashing process after tapping finishes subsequently, in the situation that significantly reduce the slag splashing time, spatter the slag effect and still be better than the upgrading slag that does not adopt this technique; adopt simultaneously this technique blowing out to carry out, can significantly improve the converter operating rate.
Embodiment
The below is described further the specific embodiment of the present invention:
Embodiment 1:
180 tons of converter estimation slag charge total amounts are between 18～20 tons, shake to the west side at it and to carry out in the tapping process, manually will throw feed supplement and throw the gudgeon position of mending at furnace lining, magnesia throwing feed supplement add-on is controlled at 80-150kg, adopt simultaneously spray repairing lance for tilting Gunning refractory to be sprayed on the furnace crown position in converter east side, spray repairing lance for tilting material spray speed is 60～100kgmin
-1, the amount general control of magnesian gunning refractory is at 180kg～250kg, adjusts add-on according to actual slag state, directly carries out the slag splashing operation after tapping finishes, spatter the slag process and do not carry out slag modification, 3min with interior slag can be spattered dried.
It is 4min that former technique is on average spattered the slag time, and per tour need be carried out a blowing out spray repair, each 10min, adopt this technique after, spattering the slag time can shorten 1min, converter needn't blowing out be carried out the spray repair operation, calculate by average daily output 30 furnace gauges, converter day operating rate can improve 4.2%.
Embodiment 2:
180 tons of converters estimate that according to the smelting situation slag charge total amount is between 15～17 tons, shake to the west side at it and to carry out in the tapping process, manually will throw feed supplement and throw the gudgeon position of mending at furnace lining, the amount general control of magnesia throwing feed supplement is at 150kg～250kg, adjust add-on according to actual slag state, directly carry out the slag splashing operation after tapping finishes, spatter the slag process and do not carry out slag modification, 2.5min with interior slag can be spattered dried.
It is 4min that former technique is on average spattered the slag time, and per tour need be carried out a blowing out spray repair, each 10min, after adopting this technique, spattering the slag time can shorten 1.5min, and converter needn't blowing out be carried out the spray repair operation, calculate by average daily output 30 furnace gauges, converter day operating rate can improve 5.2%.
Embodiment 3:
180 tons of converter estimation slag charge total amounts are shaken after the sampling of the east side thermometric of falling the stove between 17～19 tons, wait for the 5min of result of laboratory test in the time, adopt spray repairing lance for tilting Gunning refractory to be sprayed on the furnace crown position in converter west side, and spray repairing lance for tilting material spray speed is 60～100kgmin
-1, the amount general control of magnesian gunning refractory is adjusted add-on at 300～450kg according to actual slag state, then shake and carry out tapping steel to the west side, directly carry out the slag splashing operation after tapping finishes, spatter the slag process and do not carry out slag modification, 3.5min with interior slag can be spattered dried.
It is 4min that former technique is on average spattered the slag time, and per tour need be carried out a blowing out spray repair, each 10min, after adopting this technique, spattering the slag time can shorten 0.5min, and converter needn't blowing out be carried out the spray repair operation, calculate by average daily output 30 furnace gauges, converter day operating rate can improve 3.1%.
Claims (5)
1. the maintaining method of a converter lining, it is characterized in that, fall in converter the sample such as stove, wait for and in tapping or the tapping process furnace lining do not carried out the spray repair operation by the slag covering part or artificial the throwing mended operation, and after tapping finishes, carry out the slag splashing operation, needn't carry out upgrading to slag in the slag splashing process.
2. the maintaining method of a converter lining, it is characterized in that, fall in converter the sample such as stove, wait for and in tapping or the tapping process furnace lining do not carried out the spray repair operation by the slag covering part and artificial the throwing mended operation, and after tapping finishes, carry out the slag splashing operation, needn't carry out upgrading to slag in the slag splashing process.
3. the maintaining method of a kind of converter lining according to claim 1 and 2 is characterized in that, spray repairing lance for tilting material spray speed control is at 1～10kgt in the described spray repair operation
-1Slag min
-1, the amount of magnesian gunning refractory is controlled at 10～30kgt
-1Slag.
4. the maintaining method of a kind of converter lining according to claim 1 and 2 is characterized in that, the amount that magnesia throwing feed supplement in the operation is mended in described artificial throwing is controlled at 5～20kgt
-1Slag.
5. the maintaining method of a kind of converter lining according to claim 2 is characterized in that, magnesian gunning refractory and magnesia throwing feed supplement overall control are at 10～25kgt in described spray repair operation and the operation of artificial throwing benefit
-1Slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101798316A CN102851430A (en) | 2011-06-29 | 2011-06-29 | Maintenance method for converter lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101798316A CN102851430A (en) | 2011-06-29 | 2011-06-29 | Maintenance method for converter lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102851430A true CN102851430A (en) | 2013-01-02 |
Family
ID=47398404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101798316A Pending CN102851430A (en) | 2011-06-29 | 2011-06-29 | Maintenance method for converter lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102851430A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087849A (en) * | 2015-08-28 | 2015-11-25 | 东北大学 | Method for repairing converter lining |
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
| CN108723582A (en) * | 2018-07-27 | 2018-11-02 | 奔腾激光(温州)有限公司 | Real-time modification method for laser processing technological parameters |
| CN112325653A (en) * | 2020-09-28 | 2021-02-05 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Repairing method of metal mixer lining |
| CN115679033A (en) * | 2022-11-03 | 2023-02-03 | 石横特钢集团有限公司 | Method for repairing inner wall of trunnion part of converter |
-
2011
- 2011-06-29 CN CN2011101798316A patent/CN102851430A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| 刘希山 等: "顶底复吹转炉护炉工艺优化", 《山东冶金》 * |
| 李伟东 等: "提高180t转炉炉龄的生产实践", 《鞍钢技术》 * |
| 汪邦忠: "转炉干式喷补工艺的应用", 《安徽工业大学学报》 * |
| 王荣良 等: "鞍钢提高大型转炉炉龄技术研究", 《鞍钢技术》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087849A (en) * | 2015-08-28 | 2015-11-25 | 东北大学 | Method for repairing converter lining |
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
| CN107828933B (en) * | 2017-10-31 | 2020-01-03 | 日照钢铁控股集团有限公司 | Method for controlling thickness of converter lining |
| CN108723582A (en) * | 2018-07-27 | 2018-11-02 | 奔腾激光(温州)有限公司 | Real-time modification method for laser processing technological parameters |
| CN108723582B (en) * | 2018-07-27 | 2020-05-19 | 奔腾激光(温州)有限公司 | Real-time modification method for laser processing technological parameters |
| CN112325653A (en) * | 2020-09-28 | 2021-02-05 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Repairing method of metal mixer lining |
| CN112325653B (en) * | 2020-09-28 | 2022-09-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Repairing method of metal mixer lining |
| CN115679033A (en) * | 2022-11-03 | 2023-02-03 | 石横特钢集团有限公司 | Method for repairing inner wall of trunnion part of converter |
| CN115679033B (en) * | 2022-11-03 | 2023-06-16 | 石横特钢集团有限公司 | Repair method for inner wall of trunnion part of converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102851430A (en) | Maintenance method for converter lining | |
| CN103397138B (en) | Patching method for furnace lining of revolving furnace steel tapping hole part | |
| CN108728603A (en) | A kind of method of quick fettling | |
| CN104673966A (en) | Method for rapidly maintaining converter lining | |
| CN108660282A (en) | A kind of converter deslagging face furnace lining Rapid Maintenance Method | |
| CN103014224B (en) | Splashed slag furnace protection method for vanadium extraction converter | |
| CN105087849A (en) | Method for repairing converter lining | |
| CN106191370B (en) | A kind of maintaining method of converter lining | |
| CN104032066A (en) | Process for maintaining converter lining by combining metal material with heat-state furnace slag | |
| WO2022001874A1 (en) | Slag-splashing fettling method | |
| CN105925752A (en) | Method for repairing converter lining through pig iron and slag | |
| CN109136458A (en) | A kind of quick-acting fettling methods of converter | |
| CN103397133A (en) | Method for protecting converter with vanadium slag | |
| CN102965465A (en) | Method for curing converter slag | |
| CN104060025B (en) | A kind of comprehensive furnace retaining method of essemer converter | |
| CN109266807A (en) | A kind of big flow bottom blowing splashes slag and splashes furnace retaining technique in conjunction with slag phase with top blast | |
| CN102041347B (en) | Method for synchronizing combined blowing and furnace age of converter | |
| CN102534105A (en) | Maintaining method of converter lining | |
| CN104745760B (en) | The method of splashing slag in converter | |
| CN104046716A (en) | High temperature sticking resistant composition for vanadium and titanium-containing molten iron desulphurization, high temperature sticking resistant agent, and application of | |
| CN101481257A (en) | Ladle slag line gunning refractory | |
| CN106995866A (en) | A kind of low-cost high-efficiency converter fettling technique | |
| CN107475470A (en) | A kind of blast furnace uses the damping down method of pelletizing at high proportion under furnace retaining state | |
| CN103525971B (en) | Vanadium slag modifier and preparation method thereof, and vanadium-extracting revolving furnace slag-splashing furnace-protecting method | |
| CN110317920A (en) | A kind of maintaining method of the furnace bottom of top and bottom combined blown converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130102 |