CN106702073A - Hot replacement method for converter bottom blowing element - Google Patents
Hot replacement method for converter bottom blowing element Download PDFInfo
- Publication number
- CN106702073A CN106702073A CN201510789669.8A CN201510789669A CN106702073A CN 106702073 A CN106702073 A CN 106702073A CN 201510789669 A CN201510789669 A CN 201510789669A CN 106702073 A CN106702073 A CN 106702073A
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- China
- Prior art keywords
- bottom blowing
- blowing element
- sealing material
- joint sealing
- drilling
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Abstract
The invention provides a hot replacement method for a converter bottom blowing element. The hot replacement method comprises: keeping the diameter deviation of a new bottom blowing element and an original bottom blowing element not exceed 0.5-1.0mm and the diameter deviation of a drill bit and the bottom blowing element not exceed 1.0mm; after drilling, blowing a refractory in a drill hole to be clean by virtue of compressed air; uniformly smearing a joint sealing material containing the components in percentage by weight: 85-90% of Al2O3 and 10-15% of Cr2O3 at the periphery of the bottom blowing element by using a brush, wherein the smearing thickness is 4-6mm, and the smearing time is 1-2min; then, rapidly inserting the bottom blowing element to the drill hole, tamping the bottom blowing element and a combined part of the tail part of the drill hole by using a magnesium refractory, mounting a seating brick and a flange plate, sintering for 45-55min by virtue of waste heat in a converter, and combining the bottom blowing element with the bottom blowing seating brick after curing the joint sealing material. By using the hot replacement method, the corrosion of high-temperature oxidized molten steel to a bottom tuyere protecting brick and the bottom blowing element can be effectively reduced, the phenomena of steel seepage and leakage caused in a blowing process can be avoided, and accident loss can be avoided.
Description
Technical field
The invention belongs to steelmaking equipment maintenance technique field, more particularly to a kind of hot swap of top and bottom combined blown converter bottom blowing ventilated element
Method.
Background technology
At present, the main method that domestic steelwork converter blows long-lived use again is the online hot swap of bottom blowing element, and bottom blowing element is online
The know-why of hot swap is that more exchange device is closely affixed into furnace bottom ventilated element position by ring flange, is led to in drilling
Enter cooling water, open controlled motor, motor drives drilling pipe rotatably to push ahead, the resistance to material that bottom rifle position puts place is drilled through by drill bit.
Drilling pipe length is more than furnace bottom thickness, after drill bit drills through the resistance to material at furnace bottom position, exits drilling pipe, and new bottom blowing element is loaded
In drilling, Renewal process is completed.Due to drill bit and bottom blowing element dimensional discrepancy reason, brick and bottom blowing can be protected in converter bottom bottom rifle
The gap of 2~4mm is formed between element.During converter melting molten steel, because liquid steel temperature is high, oxidisability is strong, the steel of high-temperature oxydation
Water can aggravate to protect bottom rifle the erosion of brick and bottom blowing element, once molten steel forms passage, the hidden danger of bleed-out can be brought, to steel mill
Cause great loss.
The content of the invention
The present invention provides a kind of bottom-blowing of converter element hot swap method, and its purpose is intended to prevent between bottom rifle shield brick and bottom blowing element
Occurs bleed-out accident in converting process, it is to avoid causality loss.
Therefore, the solution that the present invention is taken is：
A kind of bottom-blowing of converter element hot swap method, its specific method and step are：
(1) new bottom blowing element is no more than -0.5mm~1.0mm with the diameter deviation of former bottom blowing element, and the smooth nothing in surface is split
Line；
(2) before drilling, with miking bit diameter and bottom blowing element diameter, it is ensured that bit diameter is inclined with bottom blowing element diameter
Difference is no more than 1.0mm；
(3) after drill bit drills through the resistance to material of furnace bottom position, drilling pipe is exited, is purged the resistance to material in drilling with compressed air clean；
(4) by joint sealing material with brush uniform application in bottom blowing element surrounding, smearing thickness control smears time control in 4~6mm
System is in 1~2min；It is clay shape under joint sealing material normal temperature, is into wt% is grouped into：Al2O385~90%, Cr2O310~15%；
(5) after joint sealing material is smeared and terminated, quickly bottom blowing element is inserted and is drilled, by joint sealing material by between bottom blowing element and drilling
Gap tamp；
(6) after bottom blowing element is installed, bottom blowing element is tamped with the binding site of drilling afterbody with magnesia refractories, then
First-class brick cup and ring flange, then sinter 45~55min, by bottom blowing element and bottom blowing after joint sealing material solidification using waste heat in converter
Brick cup is combined together.
Beneficial effects of the present invention are：
Due to reducing the dimensional discrepancy between drill bit and bottom blowing element, the gap between drilling and bottom blowing element is relatively reduced；
Joint sealing material is filled with gap simultaneously, the joint sealing material after solidification can by bottom blowing element and bottom blowing brick cup combine closely securely for
Integrally, so as to be effectively reduced the erosion that high-temperature oxydation molten steel protects bottom rifle brick and bottom blowing element, prevent from occurring oozing in converting process
Steel and bleed-out phenomenon, it is to avoid causality loss.
Specific embodiment
The specific method and step of bottom-blowing of converter element hot swap of the present invention be：
1st, new bottom blowing element is no more than -0.5mm~0.5mm, and the smooth flawless in surface with the diameter deviation of former bottom blowing element.
2nd, before drilling, with miking bit diameter and bottom blowing element diameter, it is ensured that bit diameter is inclined with bottom blowing element diameter
Difference is no more than 0.8mm.
3rd, after drill bit drills through the resistance to material of furnace bottom position, drilling pipe is exited, is purged the resistance to material in drilling with compressed air clean.
4th, by joint sealing material with brush uniform application in bottom blowing element surrounding, smearing thickness control is smeared time control and is existed in 5mm
1.5min.It is clay shape under joint sealing material normal temperature, is into wt% is grouped into：Al2O388%, Cr2O312%.
5th, after joint sealing material is smeared and terminated, quickly bottom blowing element is inserted and is drilled, by joint sealing material by between bottom blowing element and drilling
Gap tamp.
6th, after bottom blowing element is installed, bottom blowing element is tamped with the binding site of drilling afterbody with magnesia refractories, then
First-class brick cup and ring flange, then using waste heat sintering 50min in converter, by bottom blowing element and bottom blowing brick cup after joint sealing material solidification
Strong bonded is integrated.
Claims (1)
1. a kind of bottom-blowing of converter element hot swap method, it is characterised in that：
(1) new bottom blowing element is no more than -0.5mm~1.0mm, and surface with the diameter deviation of former bottom blowing element
Smooth flawless；
(2) before drilling, with miking bit diameter and bottom blowing element diameter, it is ensured that bit diameter and bottom
Element diameter deviation is blown no more than 1.0mm；
(3) after drill bit drills through the resistance to material of furnace bottom position, drilling pipe is exited, will be resistance in drilling with compressed air
Material purging is clean；
(4) by joint sealing material with brush uniform application in bottom blowing element surrounding, smearing thickness is controlled in 4~6mm,
Time control is smeared in 1~2min；It is clay shape under joint sealing material normal temperature, is into wt% is grouped into：Al2O385~
90%, Cr2O310~15%；
(5) after joint sealing material is smeared and terminated, quickly bottom blowing element is inserted and is drilled, it is by joint sealing material that bottom blowing is first
Tamp in gap between part and drilling；
(6) after bottom blowing element is installed, with magnesia refractories by bottom blowing element and drilling afterbody combination
Position is tamped, then first-class brick cup and ring flange, then sinters 45~55min, joint sealing material using waste heat in converter
Bottom blowing element is combined together with bottom blowing brick cup after solidification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510789669.8A CN106702073A (en) | 2015-11-17 | 2015-11-17 | Hot replacement method for converter bottom blowing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510789669.8A CN106702073A (en) | 2015-11-17 | 2015-11-17 | Hot replacement method for converter bottom blowing element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106702073A true CN106702073A (en) | 2017-05-24 |
Family
ID=58933323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510789669.8A Pending CN106702073A (en) | 2015-11-17 | 2015-11-17 | Hot replacement method for converter bottom blowing element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106702073A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371195A (en) * | 2018-10-29 | 2019-02-22 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of with the production assembly method of furnace labour synchronous converter bottom podwer gun |
| CN109735679A (en) * | 2018-12-29 | 2019-05-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of devices and methods therefor of the replacement of bottom-blowing of converter brick and gap reparation |
| CN110578033A (en) * | 2019-09-24 | 2019-12-17 | 张家港宏昌钢板有限公司 | Converter bottom blowing replacement method |
| US20220235427A1 (en) * | 2021-01-26 | 2022-07-28 | University Of Science And Technology Beijing | Long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399931A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Hot replacement method of bottom blowing element of top-bottom combined blown converter |
| CN102676730A (en) * | 2012-05-25 | 2012-09-19 | 宣化钢铁集团有限责任公司 | Converter bottom blowing air brick, special drilling machine and quick thermal replacement method of air brick |
-
2015
- 2015-11-17 CN CN201510789669.8A patent/CN106702073A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399931A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Hot replacement method of bottom blowing element of top-bottom combined blown converter |
| CN102676730A (en) * | 2012-05-25 | 2012-09-19 | 宣化钢铁集团有限责任公司 | Converter bottom blowing air brick, special drilling machine and quick thermal replacement method of air brick |
Non-Patent Citations (1)
| Title |
|---|
| 牛兴明 等: ""底吹透气元件在线热更换技术在260t转炉的应用"", 《鞍钢技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371195A (en) * | 2018-10-29 | 2019-02-22 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of with the production assembly method of furnace labour synchronous converter bottom podwer gun |
| CN109735679A (en) * | 2018-12-29 | 2019-05-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of devices and methods therefor of the replacement of bottom-blowing of converter brick and gap reparation |
| CN110578033A (en) * | 2019-09-24 | 2019-12-17 | 张家港宏昌钢板有限公司 | Converter bottom blowing replacement method |
| CN110578033B (en) * | 2019-09-24 | 2021-11-23 | 张家港宏昌钢板有限公司 | Converter bottom blowing replacement method |
| US20220235427A1 (en) * | 2021-01-26 | 2022-07-28 | University Of Science And Technology Beijing | Long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick |
| US11667982B2 (en) * | 2021-01-26 | 2023-06-06 | University Of Science And Technology Beijing | Long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
|
| WD01 | Invention patent application deemed withdrawn after publication |