CN105950818B - A kind of control method for improving the top and bottom combined blown converter bottom blowing life-span - Google Patents
A kind of control method for improving the top and bottom combined blown converter bottom blowing life-span Download PDFInfo
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- CN105950818B CN105950818B CN201610440244.0A CN201610440244A CN105950818B CN 105950818 B CN105950818 B CN 105950818B CN 201610440244 A CN201610440244 A CN 201610440244A CN 105950818 B CN105950818 B CN 105950818B
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- bottom blowing
- blown converter
- combined blown
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- span
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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
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
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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 present invention relates to a kind of control method for improving the top and bottom combined blown converter bottom blowing life-span, including：After top and bottom combined blown converter block stove terminates, bottom blowing element is set in bottom brick；The distance d1 that bottom blowing element stretches out bottom brick is 100mm~200mm；Lid sets protection tile in bottom blowing element；Baker is carried out to top and bottom combined blown converter；During baker, bottom blowing element carries out bottom blowing ventilation to set protection flow；Preceding 5 stove that top and bottom combined blown converter is smelted, the thickness of furnace bottom is improved using slag splashing mode；Preceding 10 stove that top and bottom combined blown converter is smelted, the grate angle for controlling top and bottom combined blown converter are 100 °~100 °.The control method increases effective erosion length of bottom blowing element, extends the top and bottom combined blown converter bottom blowing life-span.
Description
Technical field
The present invention relates to steelmaking technical field, more particularly to a kind of controlling party for improving the top and bottom combined blown converter bottom blowing life-span
Method.
Background technology
The life-span of converter refractory material directly affects the life-span of converter, and often turns for top and bottom combined blown converter, furnace bottom
The position for the most serious that oven refractory corrodes, therefore, in the converter smelting later stage, general use closes bottom blowing or raising furnace bottom
The method of thickness ensures the safe direct motion of converter, so causes the bottom blowing life-span shorter, it is impossible to realize bottom-blowing of converter life-span and furnace life
It is synchronous.Meanwhile in order to extend the bottom blowing life-span, it is necessary to which frequent fettling bottom, and the fluctuation of furnace bottom thickness directly results in bottom blowing element
It is exposed, so as to influence the height of converter terminal carbon oxygen product, the final quality condition for influenceing converter tapping molten steel.
The content of the invention
The invention provides a kind of control method for improving the top and bottom combined blown converter bottom blowing life-span, solves or part solves
The technical problem of top and bottom combined blown converter bottom blowing short life in the prior art, effective erosion length of increase bottom blowing element is realized,
Extend the technique effect in top and bottom combined blown converter bottom blowing life-span.
A kind of control method for improving the top and bottom combined blown converter bottom blowing life-span provided by the invention, including：
After top and bottom combined blown converter block stove terminates, bottom blowing element is set in bottom brick；The bottom blowing element is stretched out
The distance d1 of the bottom brick is 100mm~200mm；
Lid sets protection tile in the bottom blowing element；
Baker is carried out to the top and bottom combined blown converter；During the baker, the bottom blowing element is to set protection flow
Carry out bottom blowing ventilation；
Preceding 5 stove that the top and bottom combined blown converter is smelted, the thickness of furnace bottom is improved using slag splashing mode；
Preceding 10 stove that the top and bottom combined blown converter is smelted, control the grate angle of the top and bottom combined blown converter for-
100 °~100 °.
Preferably, the bottom blowing element is circular seam type bottom blowing gun.
Preferably, the upper surface and lower surface of the protection tile are all sphere；The lower surface of the protection tile with it is described
The inner surface fitting of bottom brick；
The protection tile offers mesopore；
The bottom blowing element is arranged in the mesopore.
Preferably, the thickness H of the protection tile is d1 ± 50mm；
The radius of a ball R that the radius of a ball R1 of the upper surface of the protection tile is equal to the inner surface of the bottom brick subtracts the guarantor
Protect the thickness H, i.e. R1=R-H of brick.
Preferably, the median pore diameter d is bigger 1~5mm than the diameter d0 of the bottom blowing element.
Preferably, the outside diameter D1 of the upper surface of the protection tile is bigger 10~50mm than the median pore diameter d；
The outside diameter D2 of the lower surface of the protection tile is bigger by 50 than the outside diameter D1 of the upper surface of the protection tile~
500mm。
Preferably, the material of the protection tile is identical with the material of the bottom brick.
Preferably, multiple bottom blowing elements are set in the top and bottom combined blown converter；
During the baker, each described bottom blowing element in multiple bottom blowing elements is protected with the setting
Flow carries out bottom blowing ventilation.
Preferably, during the baker, the bottom blowing element sets protection flow as 20~50m3/h。
Preferably, at the end of the 5th stove of the top and bottom combined blown converter is smelted, the thickness of the furnace bottom is higher by the protection
Brick 0mm~150mm.
One or more technical schemes provided herein, have at least the following technical effects or advantages：
As a result of bottom blowing element length is increased, then protection tile is set outside bottom blowing element, before avoiding converter smelting
Phase stretches out the molten damage of the bottom blowing element of bottom brick, by way of slag splashing, improves furnace bottom thickness, makes the effective of bottom blowing element
Length increase is corroded, while avoiding converter refractory material and lengthening causes converter heat size ratio to diminish, the final top and bottom complex blowing that extends turns
The bottom blowing life-span of stove.So, the technical problem of top and bottom combined blown converter bottom blowing short life in the prior art is efficiently solved, is realized
Increase effective erosion length of bottom blowing element, extend the technique effect in top and bottom combined blown converter bottom blowing life-span.
Brief description of the drawings
Fig. 1 is the flow chart of the control method in raising top and bottom combined blown converter bottom blowing life-span provided by the invention；
Fig. 2 is the configuration diagram of top and bottom combined blown converter provided by the invention；
Fig. 3 is the configuration diagram of the protection tile in Fig. 2.
(part that each label represents in accompanying drawing is followed successively by：1 top and bottom combined blown converter, 2 bottom bricks, 3 bottom blowing elements, 4 protections
Brick)
Embodiment
The embodiment of the present application provides a kind of control method for improving the top and bottom combined blown converter bottom blowing life-span, solves or part
Solve the technical problem of top and bottom combined blown converter bottom blowing short life in the prior art, realize effective erosion of increase bottom blowing element
Length, extend the technique effect in top and bottom combined blown converter bottom blowing life-span.
Referring to attached Fig. 1 and 2, a kind of control method for improving the top and bottom combined blown converter bottom blowing life-span provided by the invention, including：
S1：After the block stove of top and bottom combined blown converter 1 terminates, bottom blowing element 3 is set in bottom brick 2；Bottom blowing element 3 is circumferential weld
Formula bottom blowing gun.The distance d1 that bottom blowing element 3 stretches out bottom brick 2 is 100mm~200mm.
S2：Lid sets protection tile 4 in bottom blowing element 3.
S3：Baker is carried out to top and bottom combined blown converter 1；During baker, bottom blowing element 3 carries out bottom blowing to set protection flow
Ventilation；Bottom blowing element 3 sets protection flow as 20~50m3/h。
S4：Preceding 5 stove that top and bottom combined blown converter 1 is smelted, the thickness of furnace bottom is improved using slag splashing mode；Answer at top bottom
At the end of 5th stove of blow converter 1 is smelted, the distance that the thickness of furnace bottom is higher by protection tile 4 is 0mm~150mm.
S5：Preceding 10 stove that top and bottom combined blown converter 1 is smelted, control the grate angle of top and bottom combined blown converter 1 for -100 °~
100°。
Further, referring to accompanying drawing 2 and 3, the upper surface and lower surface of protection tile 4 are all sphere；The lower surface of protection tile 4
It is bonded with the inner surface of bottom brick 2；Protection tile 4 offers mesopore；Bottom blowing element 3 is arranged in mesopore.The thickness H of protection tile 4
For d1 ± 50mm；The radius of a ball R that the radius of a ball R1 of the upper surface of protection tile 4 is equal to the inner surface of bottom brick 2 subtracts protection tile 4
Thickness H, i.e. R1=R-H.Median pore diameter d is bigger 1~5mm than the diameter d0 of bottom blowing element 3.The upper surface of protection tile 4 it is cylindrical straight
Footpath D1 is bigger 10~50mm than median pore diameter d；The outside diameter D2 of the lower surface of protection tile 4 is more cylindrical than the upper surface of protection tile 4
Big 50~the 500mm of diameter D1.The material of protection tile 4 is identical with the material of bottom brick 2.
Further, multiple bottom blowing elements 3 are set in bottom brick 2；It is each in multiple bottom blowing elements 3 during baker
Individual bottom blowing element 3 all carries out bottom blowing ventilation with setting protection flow.
The control method in the raising top and bottom combined blown converter bottom blowing life-span provided below by specific embodiment the application is entered
Row is discussed in detail：
Embodiment 1
For converter one, its life of converter is 6000 stoves, and according to engineering practice, its bottom blowing life-span is 4000 stoves.It builds stove
The radius of a ball R=6000m of the inner surface of bottom brick 2 afterwards, its furnace bottom permanent layer and working lining gross thickness add up to 1200mm, mounting ring
After seam bottom blowing element 3, bottom blowing element 3 stretches out the distance d1=120mm of furnace bottom working lining, and the diameter d0 of bottom blowing element 3 is
22mm。
After the installation of bottom blowing element 3 terminates, protection tile 4 is installed in bottom blowing element 3, the thickness H of protection tile 4 is 140mm, in
Bore dia d=23mm, the outside diameter D1=40mm of the upper surface of protection tile 4, the outside diameter D2=100mm of lower surface, protect
The radius for protecting the lower surface of brick 4 is 6000m, and the radius of a ball R1 of the upper surface of protection tile 4 is 5860mm, the material of protection tile 4 and stove
The material of bottom brick 2 is identical.
When carrying out furnace operation, every bottom blowing element 3 all uses 25m3/ h setting protection flow carries out bottom blowing ventilation；Enter
Preceding 5 stove that row is smelted, the thickness of furnace bottom is improved using slag splashing mode；At the end of 5th stove of top and bottom combined blown converter 1 is smelted,
The thickness of furnace bottom is higher by protection tile 10mm.Preceding 10 stove smelted, the grate angle for controlling top and bottom combined blown converter 1 are -100 °
~100 °.
After the control method, life of converter is 6000 stoves, and the bottom blowing life-span is 5500 stoves.
Embodiment 2
For converter two, its life of converter is 7000 stoves, and according to engineering practice, its bottom blowing life-span is 4500 stoves.It builds stove
The radius of a ball R=12000m of the inner surface of bottom brick 2 afterwards, its furnace bottom permanent layer and working lining gross thickness add up to 1300mm, installation
After circular seam type bottom blowing element 3, bottom blowing element 3 stretches out the distance d1=180mm of furnace bottom working lining, and the diameter d0 of bottom blowing element 3 is
28mm。
After the installation of bottom blowing element 3 terminates, protection tile 4 is installed in bottom blowing element 3, the thickness H of protection tile 4 is 220mm, in
Bore dia d=30mm, the outside diameter D1=70mm of the upper surface of protection tile 4, the outside diameter D2=400mm of lower surface, protect
The radius of a ball for protecting the lower surface of brick 4 be 12000m, and the radius R1 of the upper surface of protection tile 4 is 11780mm, the material of protection tile 4 and
The material of bottom brick 2 is identical.
When carrying out furnace operation, every bottom blowing element 3 all uses 45m3/ h setting protection flow carries out bottom blowing ventilation；Enter
Preceding 5 stove that row is smelted, the thickness of furnace bottom is improved using slag splashing mode；At the end of 5th stove of top and bottom combined blown converter 1 is smelted,
The thickness of furnace bottom is higher by protection tile 140mm.Preceding 10 stove smelted, the grate angle for controlling top and bottom combined blown converter 1 are -100 °
~100 °.
After the control method, life of converter is 7000 stoves, and the bottom blowing life-span is 6000 stoves.
It can be drawn by above-mentioned two embodiment, the control method extends the bottom blowing life-span of top and bottom combined blown converter.
One or more technical schemes provided herein, have at least the following technical effects or advantages：
As a result of the length for increasing bottom blowing element 3, then the 3 setting protection tile 4 outside bottom blowing element, avoids converter smelting
The molten damage for stretching out the bottom blowing element 3 of bottom brick 2 early stage is refined, by way of slag splashing, furnace bottom thickness is improved, makes bottom blowing element
3 effective erosion length increase, while avoiding converter refractory material and lengthening causes converter heat size ratio to diminish, it is final to extend top bottom
The bottom blowing life-span of combined blown converter 1.So, the technology for efficiently solving top and bottom combined blown converter bottom blowing short life in the prior art is asked
Topic, effective erosion length of increase bottom blowing element is realized, extend the technique effect in top and bottom combined blown converter bottom blowing life-span.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not limited to this hair
It is bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., it should be included in the present invention
Protection domain within.
Claims (6)
1. a kind of control method for improving the top and bottom combined blown converter bottom blowing life-span, it is characterised in that the control method includes：
After top and bottom combined blown converter block stove terminates, bottom blowing element is set in bottom brick；Described in the bottom blowing element is stretched out
The distance d1 of bottom brick is 100mm~200mm；
Lid sets protection tile in the bottom blowing element；The upper surface and lower surface of the protection tile are all sphere；The protection tile
Lower surface be bonded with the inner surface of the bottom brick；The protection tile offers mesopore；The bottom blowing element is arranged on described
In mesopore；The thickness H of the protection tile is d1 ± 50mm；The radius of a ball R1 of the upper surface of the protection tile is equal to the bottom brick
The radius of a ball R of inner surface subtract the thickness H, i.e. R1=R-H of the protection tile；
Baker is carried out to the top and bottom combined blown converter；During the baker, the bottom blowing element is carried out with setting protection flow
Bottom blowing is ventilated；The bottom blowing element sets protection flow as 20~50m3/h；
Preceding 5 stove that the top and bottom combined blown converter is smelted, the thickness of furnace bottom is improved using slag splashing mode；Answer at the top bottom
At the end of 5th stove of blow converter is smelted, the thickness of the furnace bottom is higher by the protection tile 0mm~150mm；
Preceding 10 stove that the top and bottom combined blown converter is smelted, control the grate angle of the top and bottom combined blown converter for -100 °~
100°。
2. the control method in top and bottom combined blown converter bottom blowing life-span is improved as claimed in claim 1, it is characterised in that
The bottom blowing element is circular seam type bottom blowing gun.
3. the control method in top and bottom combined blown converter bottom blowing life-span is improved as claimed in claim 1, it is characterised in that
The median pore diameter d is bigger 1~5mm than the diameter d0 of the bottom blowing element.
4. the control method in top and bottom combined blown converter bottom blowing life-span is improved as claimed in claim 3, it is characterised in that
The outside diameter D1 of the upper surface of the protection tile is bigger 10~50mm than the median pore diameter d；
The outside diameter D2 of the lower surface of the protection tile is bigger by 50 than the outside diameter D1 of the upper surface of the protection tile~
500mm。
5. the control method in top and bottom combined blown converter bottom blowing life-span is improved as claimed in claim 1, it is characterised in that
The material of the protection tile is identical with the material of the bottom brick.
6. the control method in top and bottom combined blown converter bottom blowing life-span is improved as claimed in claim 1, it is characterised in that
Multiple bottom blowing elements are set in the top and bottom combined blown converter；
During the baker, each described bottom blowing element in multiple bottom blowing elements protects flow with the setting
Carry out bottom blowing ventilation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610440244.0A CN105950818B (en) | 2016-06-17 | 2016-06-17 | A kind of control method for improving the top and bottom combined blown converter bottom blowing life-span |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610440244.0A CN105950818B (en) | 2016-06-17 | 2016-06-17 | A kind of control method for improving the top and bottom combined blown converter bottom blowing life-span |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105950818A CN105950818A (en) | 2016-09-21 |
| CN105950818B true CN105950818B (en) | 2018-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610440244.0A Active CN105950818B (en) | 2016-06-17 | 2016-06-17 | A kind of control method for improving the top and bottom combined blown converter bottom blowing life-span |
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| CN111876550A (en) * | 2020-06-29 | 2020-11-03 | 武汉钢铁有限公司 | Method and device for controlling furnace bottom gas supply of top-bottom combined blown converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0070197A1 (en) * | 1981-07-15 | 1983-01-19 | Nippon Steel Corporation | A nozzle assembly for bottom blown steel converter |
| CN101338350A (en) * | 2008-08-07 | 2009-01-07 | 武汉钢铁(集团)公司 | Element protection process by bottom-blowing gas supply |
| CN101613781A (en) * | 2009-07-24 | 2009-12-30 | 莱芜钢铁股份有限公司 | A kind of bottom-blown air brick of top and bottom repeatedly blown converter and mounting structure thereof |
| CN202658177U (en) * | 2012-04-26 | 2013-01-09 | 河北钢铁股份有限公司唐山分公司 | Bottom blowing protection brick structure for converter |
-
2016
- 2016-06-17 CN CN201610440244.0A patent/CN105950818B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0070197A1 (en) * | 1981-07-15 | 1983-01-19 | Nippon Steel Corporation | A nozzle assembly for bottom blown steel converter |
| CN101338350A (en) * | 2008-08-07 | 2009-01-07 | 武汉钢铁(集团)公司 | Element protection process by bottom-blowing gas supply |
| CN101613781A (en) * | 2009-07-24 | 2009-12-30 | 莱芜钢铁股份有限公司 | A kind of bottom-blown air brick of top and bottom repeatedly blown converter and mounting structure thereof |
| CN202658177U (en) * | 2012-04-26 | 2013-01-09 | 河北钢铁股份有限公司唐山分公司 | Bottom blowing protection brick structure for converter |
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|---|---|
| CN105950818A (en) | 2016-09-21 |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
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