CN107299184A - Dephosphorization converter bottom blowing tuyere maintenance method - Google Patents
Dephosphorization converter bottom blowing tuyere maintenance method Download PDFInfo
- Publication number
- CN107299184A CN107299184A CN201710551343.0A CN201710551343A CN107299184A CN 107299184 A CN107299184 A CN 107299184A CN 201710551343 A CN201710551343 A CN 201710551343A CN 107299184 A CN107299184 A CN 107299184A
- Authority
- CN
- China
- Prior art keywords
- converter
- slag
- dephosphorization
- decarburization
- dephosphorization converter
- 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
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000007664 blowing Methods 0.000 title claims abstract description 23
- 238000012423 maintenance Methods 0.000 title 1
- 239000002893 slag Substances 0.000 claims abstract description 98
- 238000005261 decarburization Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 229910000514 dolomite Inorganic materials 0.000 claims description 9
- 239000010459 dolomite Substances 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 230000003628 erosive effect Effects 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 239000013049 sediment Substances 0.000 abstract 4
- 238000005262 decarbonization Methods 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- 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
- C21C5/36—Processes yielding slags of special composition
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the technical field of steel making, in particular to a method for maintaining a bottom blowing tuyere of a dephosphorization converter, which comprises the following steps: adding liquid slag of the decarburization converter into the dephosphorization converter; and carrying out slag splashing process on the dephosphorization converter added with the slag of the decarburization converter. This application is through adding liquid decarbonization converter slag in to the dephosphorization converter, utilizes high basicity and high melting point decarbonization converter slag to spatter the sediment process, spatters the sediment layer that spatters that each position of furnace lining of dephosphorization converter can form 30-50mm after the sediment for the erosion resistance of dephosphorization converter has been strengthened, and at bottom-blown tuyere position formation sediment, steel layer, the bottom-blown is clearly visible, has guaranteed the dephosphorization effect.
Description
Technical field
The present invention relates to steelmaking technical field, more particularly to a kind of dephosphorization converter bottom blowing air port maintaining method.
Background technology
During dephosphorization converter and decarburization converter are commonly utilized in steel-making.For dephosphorization converter, dephosphorization converter
Blowing end point temperature is low, and in-furnace temperature is about 1350 degrees Celsius, and dephosphorization converter finishing slag basicity is low, general basicity in 1.8-2.5,
In addition, lime dissolves bad in dephosphorization converter smelting process, there are many non-fossils ashes, when splashing slag, non-fossil eventually in finishing slag
Ash is in granular form, and tack is very poor when splashing slag, is almost glued less than on furnace lining.Therefore, because dephosphorization converter smelted furnace cinder is low alkali
Degree, low melting point, Gao Quantie (TFe) clinker, therefore the clinker erosion resisting of dephosphorization converter is very poor.
Further, during semisteel smelting, to ensure scrap melting and obtaining good dephosphorization effect, generally using big
Bottom blowing gas intensity, such as air supply intensity are 0.15-0.3Nm3/ min*t, and larger bottom blowing gas intensity, in dephosphorization converter sheet
On the basis of body clinker erosion resisting difference so that dephosphorization converter bottom blowing air port can not form metal mushroom head, but become funnel
Shape, bottom blowing air port if reusing mending material carries out fettling, is easily blocked, influences dephosphorization effect so that dephosphorization effect is deteriorated.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the dephosphorization converter bottom blowing air port maintaining method of problem.
The embodiment of the present invention provides a kind of dephosphorization converter bottom blowing air port maintaining method, and methods described includes：
The decarburization converter slag being in a liquid state is added into the dephosphorization converter；
There is the dephosphorization converter of the decarburization converter slag to carry out splashing slag process to addition.
It is preferred that, each chemical composition and the mass percent of each chemical composition that the decarburization converter slag is included are：
Calcium oxide：30-45%, silica：7-18%, magnesia：8-14%, alundum (Al2O3)：1.0-3.5%, Quan Tie：15-
25%.
It is preferred that, the addition of the decarburization converter slag is that the dephosphorization converter that the scale of construction is 300 tons adds 10-15 tons
The decarburization converter slag.
It is preferred that, during slag is splashed, the slag time is splashed for 2-3 minutes.
It is preferred that, during slag is splashed, gas supply flow is 55000-60000Nm3/h。
It is preferred that, during slag is splashed, light dolomite is added into the dephosphorization converter.
It is preferred that, the addition of the light dolomite is 1.0-1.2kg/ tons of steel.
It is preferred that, the basicity of the decarburization converter slag is higher than the basicity of the dephosphorization converter clinker.
It is preferred that, the basicity of the decarburization converter slag is 3-4.5.
One or more of embodiment of the present invention technical scheme, has at least the following technical effects or advantages：
The application utilizes high alkalinity and dystectic decarburization by the decarburization converter slag of the addition liquid into dephosphorization converter
Converter slag carries out splashing slag process, and splash that each position of furnace lining of dephosphorization converter after slag can form 30-50mm splashes slag blanket so that
The erosion resisting of dephosphorization converter is enhanced, and slag, steel layer are formed at bottom blowing air port position, bottom blowing is high-visible, it is ensured that de-
Phosphorus effect.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is represented with identical reference pattern.In the accompanying drawings：
Fig. 1 shows a kind of flow chart of dephosphorization converter bottom blowing air port maintaining method in the embodiment of the present invention；
Fig. 2 shows the stream of the dephosphorization converter bottom blowing air port maintaining method in actual application in the embodiment of the present invention
Cheng Tu.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.
The embodiment of the present invention provides a kind of dephosphorization converter bottom blowing air port maintaining method, as shown in figure 1, methods described includes：
Step 101：The decarburization converter slag being in a liquid state is added into the dephosphorization converter；
Step 102：There is the dephosphorization converter of the decarburization converter slag to carry out splashing slag process to addition.
The application utilizes high alkalinity and dystectic decarburization by the decarburization converter slag of the addition liquid into dephosphorization converter
Converter slag carries out splashing slag process, and splash that each position of furnace lining of dephosphorization converter after slag can form 30-50mm splashes slag blanket so that
The erosion resisting of dephosphorization converter is enhanced, and slag, steel layer are formed at bottom blowing air port position, bottom blowing is high-visible, it is ensured that de-
Phosphorus effect.In addition, there is the decarburization converter slag of liquid good mobility, which can further improve, splashes slag effect so that splash slag
The erosion resisting of the dephosphorization converter obtained afterwards is improved.
In specific implementation process, the addition of decarburization converter slag is that the dephosphorization converter that the scale of construction is 300 tons is added
The 10-15 tons of decarburization converter slags.Also, the clinker of decarburization converter is transported in dephosphorization converter using special slag ladle.
In a preferred embodiment, decarburization converter slag is included each chemical composition and the matter of each chemical composition
Measuring percentage is：Calcium oxide (CaO)：30-45%, silica (SiO2)：7-18%, magnesia (MgO)：8-14%, three oxygen
Change two aluminium (Al2O3)：1.0-3.5%, full iron (TFe)：15-25%, so that by using the decarburization converter with said ratio
Clinker carries out splashing slag to dephosphorization converter, and the corrosion-resistant property of the dephosphorization converter splashed after slag accesses further raising.
In a preferred embodiment, the basicity of decarburization converter slag is higher than the basicity of dephosphorization converter clinker, decarburization
The basicity of converter slag can be 3-4.5, so as to by using the decarbonizing furnace clinker with above-mentioned basicity, finally splash de- after slag
The corrosion-resistant property of phosphorus converter can be further enhanced.
In a preferred embodiment, during slag is splashed, it is 2-3 minutes to splash the slag time, and gas supply flow is
55000-60000Nm3/ h, slag effect is splashed so as to further raising.
In a preferred embodiment, during slag is splashed, light dolomite can be added into dephosphorization converter, gently
The addition of calcined dolomite is 1.0-1.2kg/ tons of steel, so as to the basicity of molten steel in further regulation dephosphorization converter, and is reached
To the effect of thickening, realize and quickly play slag.
The dephosphorization converter bottom blowing air port maintaining method of the application is carried out specifically below in conjunction with three specific embodiments
It is bright.
Embodiment one
First, the decarburization converter slags being in a liquid state to the scale of construction for 10 tons of addition in 300 tons of dephosphorization converter, the decarburization converter
Each chemical composition and the mass percent of each chemical composition that clinker is included be：Calcium oxide：40.51%, silica：
10.29%, magnesia：11.81%, alundum (Al2O3)：2.64%, Quan Tie：21.25%, the basicity of decarburization converter slag is：
4.07.Then, carry out splashing slag process, during slag is splashed, splash the slag time for 2 minutes, gas supply flow is 60000Nm3/ h, and
1113kg light dolomite is added into dephosphorization converter during slag is splashed, finally, splashes after slag and forms 20mm and splash slag blanket.
Embodiment two
First, the decarburization converter slags being in a liquid state to the scale of construction for 15 tons of addition in 300 tons of dephosphorization converter, the decarburization converter
Each chemical composition and the mass percent of each chemical composition that clinker is included be：Calcium oxide：40.77%, silica：
11.37%, magnesia：11.91%, alundum (Al2O3)：2.57%, Quan Tie：20.35%, the basicity of decarburization converter slag is：
3.65.Then, carry out splashing slag process, during slag is splashed, splash the slag time for 2.5 minutes, gas supply flow is 60000Nm3/ h, and
And 1189kg light dolomite is added into dephosphorization converter during slag is splashed, finally, splash after slag and form 20mm and splash slag blanket.
Embodiment three
First, the decarburization converter slags being in a liquid state to the scale of construction for 13 tons of addition in 300 tons of dephosphorization converter, the decarburization converter
Each chemical composition and the mass percent of each chemical composition that clinker is included be：Calcium oxide：39.81%, silica：
10.79%, magnesia：9.85%, alundum (Al2O3)：2.16%, Quan Tie：19.76%, the basicity of decarburization converter slag is：
3.69.Then, carry out splashing slag process, during slag is splashed, splash the slag time for 3 minutes, gas supply flow is 58000Nm3/ h, and
1199kg light dolomite is added into dephosphorization converter during slag is splashed, finally, splashes after slag and forms 20mm and splash slag blanket.
In addition, the application also provides the flow chart of the dephosphorization converter bottom blowing air port maintaining method in actual application, see
Shown in Fig. 2.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
The application utilizes high alkalinity and dystectic decarburization by the decarburization converter slag of the addition liquid into dephosphorization converter
Converter slag carries out splashing slag process, and splash that each position of furnace lining of dephosphorization converter after slag can form 30-50mm splashes slag blanket so that
The erosion resisting of dephosphorization converter is enhanced, and slag, steel layer are formed at bottom blowing air port position, bottom blowing is high-visible, it is ensured that de-
Phosphorus effect.In addition, there is the decarburization converter slag of liquid good mobility, which can further improve, splashes slag effect so that splash slag
The erosion resisting of the dephosphorization converter obtained afterwards is improved.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (9)
1. a kind of dephosphorization converter bottom blowing air port maintaining method, it is characterised in that methods described includes：
The decarburization converter slag being in a liquid state is added into the dephosphorization converter；
There is the dephosphorization converter of the decarburization converter slag to carry out splashing slag process to addition.
2. the method as described in claim 1, it is characterised in that each chemical composition that the decarburization converter slag is included and each
The mass percent of chemical composition is：Calcium oxide：30-45%, silica：7-18%, magnesia：8-14%, three oxidations two
Aluminium：1.0-3.5%, Quan Tie：15-25%.
3. the method as described in claim 1, it is characterised in that the addition of the decarburization converter slag is that the scale of construction is 300 tons
The dephosphorization converter add the 10-15 tons of decarburization converter slags.
4. the method as described in claim 1, it is characterised in that during slag is splashed, splashed the slag time for 2-3 minutes.
5. the method as described in claim 1, it is characterised in that during slag is splashed, gas supply flow is 55000-60000Nm3/
h。
6. the method as described in claim 1, it is characterised in that during slag is splashed, is added light-burned into the dephosphorization converter
Dolomite.
7. method as claimed in claim 6, it is characterised in that the addition of the light dolomite is 1.0-1.2kg/ tons
Steel.
8. the method as described in claim 1, it is characterised in that the basicity of the decarburization converter slag is higher than the dephosphorization converter
The basicity of clinker.
9. the method as described in claim 1, it is characterised in that the basicity of the decarburization converter slag is 3-4.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551343.0A CN107299184A (en) | 2017-07-07 | 2017-07-07 | Dephosphorization converter bottom blowing tuyere maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551343.0A CN107299184A (en) | 2017-07-07 | 2017-07-07 | Dephosphorization converter bottom blowing tuyere maintenance method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107299184A true CN107299184A (en) | 2017-10-27 |
Family
ID=60132771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710551343.0A Pending CN107299184A (en) | 2017-07-07 | 2017-07-07 | Dephosphorization converter bottom blowing tuyere maintenance method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107299184A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212640A (en) * | 2011-06-01 | 2011-10-12 | 首钢总公司 | Convertor steelmaking method capable of reducing slag quantity |
| CN102242239A (en) * | 2011-07-28 | 2011-11-16 | 首钢总公司 | Molten iron pre-dephosphorization method by utilizing top and bottom combined blown converter |
-
2017
- 2017-07-07 CN CN201710551343.0A patent/CN107299184A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212640A (en) * | 2011-06-01 | 2011-10-12 | 首钢总公司 | Convertor steelmaking method capable of reducing slag quantity |
| CN102242239A (en) * | 2011-07-28 | 2011-11-16 | 首钢总公司 | Molten iron pre-dephosphorization method by utilizing top and bottom combined blown converter |
Non-Patent Citations (1)
| Title |
|---|
| 董文亮 等: ""‘全三脱’工艺流程中脱碳渣返回脱磷转炉利用"", 《钢铁》 * |
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