CN105950818A - Control method for prolonging bottom blowing service life of top-bottom combined blowing converter - Google Patents
Control method for prolonging bottom blowing service life of top-bottom combined blowing converter Download PDFInfo
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- CN105950818A CN105950818A CN201610440244.0A CN201610440244A CN105950818A CN 105950818 A CN105950818 A CN 105950818A CN 201610440244 A CN201610440244 A CN 201610440244A CN 105950818 A CN105950818 A CN 105950818A
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- China
- Prior art keywords
- bottom blowing
- blowing
- converter
- blown converter
- combined blown
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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 invention relates to a control method for prolonging the bottom blowing service life of a top-bottom combined blowing converter. The control method comprises the steps that after walling up of the top-bottom combined blowing converter is over, bottom blowing elements are arranged in converter bottom bricks; the distance d1 by which the bottom blowing elements stretch out of the converter bottom bricks ranges from 100 mm to 200 mm; the bottom blowing elements are covered with protection bricks; converter baking is conducted on the top-bottom combined blowing converter; in the converter baking process, the bottom blowing elements conduct bottom blowing ventilation with the set protection flow; in first five converters before smelting of the top-bottom combined blowing converter, the thickness of the converter bottom is increased through a splashed slag converter protection manner; and in first ten converters before smelting of the top-bottom combined blowing converter, the converter rocking angle of the top-bottom combined blowing converter is controlled to range from -100 degrees to 100 degrees. According to the control method, the effective erosion length of the bottom blowing elements is increased, and the bottom blowing service life of the top-bottom combined blowing converter is prolonged.
Description
Technical field
The present invention relates to steelmaking technical field, improve the top and bottom combined blown converter bottom blowing life-span particularly to one
Control method.
Background technology
The life-span of converter refractory material directly affects the life-span of converter, and for top and bottom combined blown converter, stove
The end, is often the most serious position of converter refractory corrosion, therefore, in the converter smelting later stage, and one
As use close bottom blowing or improve furnace bottom thickness method ensure the safe direct motion of converter, so cause
The bottom blowing life-span is shorter, it is impossible to realize the bottom-blowing of converter life-span Tong Bu with furnace life.Meanwhile, in order to extend bottom blowing
In the life-span, need at the bottom of frequent fettling, and the fluctuation of furnace bottom thickness directly results in the exposed of bottom blowing element, from
And affect the height that converter terminal carbon oxygen is long-pending, finally affect the quality condition of converter tapping molten steel.
Summary of the invention
The invention provides a kind of control method improving the top and bottom combined blown converter bottom blowing life-span, solve or
Part solves the technical problem that in prior art, the top and bottom combined blown converter bottom blowing life-span is short, it is achieved that increase
Bottom blowing element effectively corrode length, extend the technique effect in top and bottom combined blown converter bottom blowing life-span.
A kind of control method improving the top and bottom combined blown converter bottom blowing life-span that the present invention provides, including:
After described top and bottom combined blown converter block stove terminates, bottom brick arranges bottom blowing element；The described end
Blowing element and stretching out distance d1 of described bottom brick is 100mm～200mm；
Protection tile is set at described bottom blowing element upper cover；
Described top and bottom combined blown converter is carried out baker；During described baker, described bottom blowing element is to set
Surely protection flow carries out bottom blowing ventilation；
Described top and bottom combined blown converter carries out front 5 stoves smelted, and uses slag splashing mode to improve furnace bottom
Thickness；
Described top and bottom combined blown converter carries out front 10 stoves smelted, and controls the grate of described top and bottom combined blown converter
Angle is-100 °～100 °.
As preferably, described bottom blowing element is circular seam type bottom blowing gun.
As preferably, the upper surface of described protection tile and lower surface are all sphere；Under described protection tile
The inner surface laminating of surface and described bottom brick；
Described protection tile offers mesopore；
Described bottom blowing element is arranged in described mesopore.
As preferably, the thickness H of described protection tile is d1 ± 50mm；
The radius of a ball R1 of the upper surface of described protection tile is equal to the radius of a ball of the inner surface of described bottom brick
R deducts the thickness H of described protection tile, i.e. R1=R-H.
As preferably, described median pore diameter d is than the diameter d0 big 1～5mm of described bottom blowing element.
As preferably, the outside diameter D1 of the upper surface of described protection tile is bigger than described median pore diameter d
10～50mm；
The outside diameter D2 of the lower surface of described protection tile is more straight than the cylindrical of the upper surface of described protection tile
Footpath D1 big 50～500mm.
As preferably, the material of described protection tile is identical with the material of described bottom brick.
As preferably, described top and bottom combined blown converter arranges multiple described bottom blowing element；
During described baker, each the described bottom blowing element in multiple described bottom blowing element is with institute
State setting protection flow and carry out bottom blowing ventilation.
As preferably, during described baker, setting of described bottom blowing element protects flow as 20～50
m3/h。
As preferably, at the end of the 5th stove of described top and bottom combined blown converter is smelted, the thickness of described furnace bottom
Exceed described protection tile 0mm～150mm.
One or more technical schemes provided herein, at least have the following technical effect that or advantage:
Owing to have employed growth bottom blowing element length, then protection tile is set outside bottom blowing element, it is to avoid
Converter smelting early stage stretches out the molten damage of the bottom blowing element of bottom brick, by the way of slag splashing, improves
Furnace bottom thickness, makes the length that effectively corrodes of bottom blowing element increase, avoids converter refractory material simultaneously and add
Length causes converter heat size ratio to diminish, the final bottom blowing life-span extending top and bottom combined blown converter.So, effectively
Solve the technical problem that in prior art, the top and bottom combined blown converter bottom blowing life-span is short, it is achieved that increase bottom blowing
Element effectively corrode length, extend the technique effect in top and bottom combined blown converter bottom blowing life-span.
Accompanying drawing explanation
The flow process of the control method improving the top and bottom combined blown converter bottom blowing life-span that Fig. 1 provides for the present invention
Figure；
The configuration diagram of the top and bottom combined blown converter that Fig. 2 provides for the present invention；
Fig. 3 is the configuration diagram of the protection tile in Fig. 2.
(parts that in accompanying drawing, each label represents are followed successively by: 1 top and bottom combined blown converter, 2 bottom bricks,
3 bottom blowing element, 4 protection tiles)
Detailed description of the invention
The embodiment of the present application provides a kind of control method improving the top and bottom combined blown converter bottom blowing life-span, solves
Determine or part solved the technical problem that in prior art, the top and bottom combined blown converter bottom blowing life-span is short, it is achieved
Increase bottom blowing element effectively corrodes length, extends the technique effect in top and bottom combined blown converter bottom blowing life-span.
See attached Fig. 1 and 2, a kind of control improving the top and bottom combined blown converter bottom blowing life-span that the present invention provides
Method processed, including:
S1: build after stove terminates at top and bottom combined blown converter 1, bottom blowing element 3 is set in bottom brick 2；
Bottom blowing element 3 is circular seam type bottom blowing gun.Bottom blowing element 3 stretches out distance d1 of bottom brick 2
100mm～200mm.
S2: set protection tile 4 at bottom blowing element 3 upper cover.
S3: top and bottom combined blown converter 1 is carried out baker；During baker, bottom blowing element 3 is to set guarantor
Protect flow and carry out bottom blowing ventilation；Setting of bottom blowing element 3 protects flow as 20～50m3/h。
S4: top and bottom combined blown converter 1 carries out front 5 stoves smelted, and uses slag splashing mode to improve furnace bottom
Thickness；At the end of 5th stove of top and bottom combined blown converter 1 is smelted, the thickness of furnace bottom exceeds protection tile 4
Distance be 0mm～150mm.
S5: top and bottom combined blown converter 1 carries out front 10 stoves smelted, and controls shaking of top and bottom combined blown converter 1
Chimney corner degree is-100 °～100 °.
Further, seeing accompanying drawing 2 and 3, the upper surface of protection tile 4 and lower surface are all sphere；
The inner surface laminating of the lower surface of protection tile 4 and bottom brick 2；Protection tile 4 offers mesopore；Bottom blowing
Element 3 is arranged in mesopore.The thickness H of protection tile 4 is d1 ± 50mm；The upper table of protection tile 4
The radius of a ball R1 in face deducts the thickness H of protection tile 4 equal to the radius of a ball R of the inner surface of bottom brick 2,
I.e. R1=R-H.Median pore diameter d is than the diameter d0 big 1～5mm of bottom blowing element 3.Protection tile 4 upper
The outside diameter D1 on surface is than median pore diameter d big 10～50mm；The cylindrical of the lower surface of protection tile 4
Diameter D2 is than the outside diameter D1 big 50～500mm of the upper surface of protection tile 4.The material of protection tile 4
Matter is identical with the material of bottom brick 2.
Further, bottom brick 2 arranges multiple bottom blowing element 3；During baker, multiple bottom blowings
Each bottom blowing element 3 in element 3 carries out bottom blowing ventilation to set protection flow.
Below by specific embodiment, the application offer is improved the control in top and bottom combined blown converter bottom blowing life-span
Method processed describes 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 the radius of a ball R=6000m of inner surface of furnace rear bottom brick 2, its furnace bottom permanent layer and
Working lining gross thickness adds up to 1200mm, and after mounting ring seam bottom blowing element 3, bottom blowing element 3 is stretched out
Distance d1=120mm of furnace bottom working lining, the diameter d0 of bottom blowing element 3 is 22mm.
Bottom blowing element 3 is installed after terminating, and installs protection tile 4 in bottom blowing element 3, protection tile 4
Thickness H is 140mm, median pore diameter d=23mm, the outside diameter of the upper surface of protection tile 4
D1=40mm, the outside diameter D2=100mm of lower surface, the radius of the lower surface of protection tile 4 is
6000m, the radius of a ball R1 of the upper surface of protection tile 4 are 5860mm, protection tile 4 material and furnace bottom
The material of brick 2 is identical.
When carrying out furnace operation, every bottom blowing element 3 all uses 25m3The setting protection flow of/h is carried out
Bottom blowing is ventilated；Carry out front 5 stoves smelted, use slag splashing mode to improve the thickness of furnace bottom；The end, top
At the end of 5th stove of combined blown converter 1 is smelted, the thickness of furnace bottom exceeds protection tile 10mm.Carry out smelting
Front 10 stoves of refining, the grate angle controlling top and bottom combined blown converter 1 is-100 °～100 °.
After using this 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.The radius of a ball R=12000m of the inner surface of its block furnace rear bottom brick 2, its furnace bottom permanent layer
Adding up to 1300mm with working lining gross thickness, after mounting ring seam bottom blowing element 3, bottom blowing element 3 is stretched
Coming out of the stove distance d1=180mm of end working lining, the diameter d0 of bottom blowing element 3 is 28mm.
Bottom blowing element 3 is installed after terminating, and installs protection tile 4 in bottom blowing element 3, protection tile 4
Thickness H is 220mm, median pore diameter d=30mm, the outside diameter of the upper surface of protection tile 4
D1=70mm, the outside diameter D2=400mm of lower surface, the radius of a ball of the lower surface of protection tile 4 is
12000m, the radius R1 of the upper surface of protection tile 4 are 11780mm, protection tile 4 material and furnace bottom
The material of brick 2 is identical.
When carrying out furnace operation, every bottom blowing element 3 all uses 45m3The setting protection flow of/h is carried out
Bottom blowing is ventilated；Carry out front 5 stoves smelted, use slag splashing mode to improve the thickness of furnace bottom；The end, top
At the end of 5th stove of combined blown converter 1 is smelted, the thickness of furnace bottom exceeds protection tile 140mm.Carry out smelting
Front 10 stoves of refining, the grate angle controlling top and bottom combined blown converter 1 is-100 °～100 °.
After using this control method, life of converter is 7000 stoves, and the bottom blowing life-span is 6000 stoves.
Can be drawn by above-mentioned two embodiment, this control method extends the end of top and bottom combined blown converter
Blow the life-span.
One or more technical schemes provided herein, at least have the following technical effect that or advantage:
Owing to have employed the length increasing bottom blowing element 3, then protection tile is set in bottom blowing element outer 3
4, it is to avoid converter smelting early stage stretches out the molten damage of the bottom blowing element 3 of bottom brick 2, by slag splashing
Mode, improves furnace bottom thickness, makes the length that effectively corrodes of bottom blowing element 3 increase, avoids simultaneously and turn
Oven refractory lengthens and causes converter heat size ratio to diminish, the final bottom blowing longevity extending top and bottom combined blown converter 1
Life.So, efficiently solve the technical problem that in prior art, the top and bottom combined blown converter bottom blowing life-span is short,
Achieve increase bottom blowing element effectively corrodes length, extends the technology in top and bottom combined blown converter bottom blowing life-span
Effect.
Above-described detailed description of the invention, enters the purpose of the present invention, technical scheme and beneficial effect
Go further description, be it should be understood that the specific embodiment party that the foregoing is only the present invention
Formula, is not limited to the present invention, all within the spirit and principles in the present invention, that is done appoints
What amendment, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the control method improving the top and bottom combined blown converter bottom blowing life-span, it is characterised in that described control
Method processed includes:
After described top and bottom combined blown converter block stove terminates, bottom brick arranges bottom blowing element；The described end
Blowing element and stretching out distance d1 of described bottom brick is 100mm～200mm；
Protection tile is set at described bottom blowing element upper cover；
Described top and bottom combined blown converter is carried out baker；During described baker, described bottom blowing element is to set
Surely protection flow carries out bottom blowing ventilation；
Described top and bottom combined blown converter carries out front 5 stoves smelted, and uses slag splashing mode to improve furnace bottom
Thickness；
Described top and bottom combined blown converter carries out front 10 stoves smelted, and controls the grate of described top and bottom combined blown converter
Angle is-100 °～100 °.
2. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 1, it is special
Levy and be,
Described bottom blowing element is circular seam type bottom blowing gun.
3. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 1, it is special
Levy and be,
The upper surface of described protection tile and lower surface are all sphere；The lower surface of described protection tile is with described
The inner surface laminating of bottom brick；
Described protection tile offers mesopore；
Described bottom blowing element is arranged in described mesopore.
4. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 3, it is special
Levy and be,
The thickness H of described protection tile is d1 ± 50mm；
The radius of a ball R1 of the upper surface of described protection tile is equal to the radius of a ball of the inner surface of described bottom brick
R deducts the thickness H of described protection tile, i.e. R1=R-H.
5. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 3, it is special
Levy and be,
Described median pore diameter d is than the diameter d0 big 1～5mm of described bottom blowing element.
6. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 5, it is special
Levy and be,
The outside diameter D1 bigger than described median pore diameter d 10～50mm of the upper surface of described protection tile；
The outside diameter D2 of the lower surface of described protection tile is more straight than the cylindrical of the upper surface of described protection tile
Footpath D1 big 50～500mm.
7. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 1, it is special
Levy and be,
The material of described protection tile is identical with the material of described bottom brick.
8. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 1, it is special
Levy and be,
Described top and bottom combined blown converter arranges multiple described bottom blowing element；
During described baker, each the described bottom blowing element in multiple described bottom blowing element is with institute
State setting protection flow and carry out bottom blowing ventilation.
9. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 1, it is special
Levy and be,
During described baker, setting of described bottom blowing element protects flow as 20～50m3/h。
10. the control method improving the top and bottom combined blown converter bottom blowing life-span as claimed in claim 1, its
It is characterised by,
At the end of 5th stove of described top and bottom combined blown converter is smelted, the thickness of described furnace bottom exceeds described guarantor
Protect brick 0mm～150mm.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN105950818A true CN105950818A (en) | 2016-09-21 |
| CN105950818B CN105950818B (en) | 2018-01-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN105950818B (en) | 2018-01-23 |
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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 |