CN110760640A - Steel slag isolating agent for oxygen lance - Google Patents
Steel slag isolating agent for oxygen lance Download PDFInfo
- Publication number
- CN110760640A CN110760640A CN201911104259.XA CN201911104259A CN110760640A CN 110760640 A CN110760640 A CN 110760640A CN 201911104259 A CN201911104259 A CN 201911104259A CN 110760640 A CN110760640 A CN 110760640A
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- CN
- China
- Prior art keywords
- steel slag
- separant
- oxygen lance
- equal
- sio
- 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.)
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Classifications
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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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
Abstract
The invention discloses a steel slag separant for an oxygen lance, which has the density of more than or equal to 1.95g/cm3The bonding strength is more than or equal to 0.25 Mpa; c, Al in the steel slag separant2O3、SiO2The mass content of the components is as follows: c: greater than or equal to 55 percent of Al2O3：5％～8％，SiO2: 8 to 12 percent. The steel slag separant has simple composition, low cost and convenient use, and can be sprayed on the surface of an oxygen lance to form a protective film on the surface of the oxygen lance, thereby effectively reducing the labor intensity during cleaning, shortening the cleaning time and improving the production capacity.
Description
Technical Field
The invention relates to a high-temperature coating for steelmaking equipment, in particular to a steel slag separant for an oxygen lance.
Background
The oxygen lance is the main equipment for converter steelmaking, high-purity oxygen is blown into the converter at supersonic speed, steel is easily adhered to the outer surface of the converter during the blowing process, the lance body becomes thick after the steel is adhered to the oxygen lance, the lifting fault of the oxygen lance is easily caused, even the situation that the oxygen lance cannot be lifted out seriously affects the converter blowing, and the production cannot be normally carried out is caused; the sticking of the steel on the oxygen lance can damage the lance head, influence the oxygen supply effect in the blowing process and shorten the service life of the oxygen lance nozzle. In addition, at present, the cleaning of the sticky steel on the surface of the oxygen lance is high in labor intensity and long in cleaning time, so that the efficient operation of the production process is influenced.
Disclosure of Invention
The invention aims to provide a steel slag separant which is simple in composition, low in price and convenient to use and is sprayed on the surface of an oxygen lance, and the steel slag separant forms a protective film on the surface of the oxygen lance, so that the labor intensity during cleaning is effectively reduced, the cleaning time is shortened, and the production capacity is improved.
In order to achieve the aim, the density of the steel slag separant for the oxygen lance is more than or equal to 1.95g/cm3The bonding strength is more than or equal to 0.25 Mpa; c, Al in the steel slag separant2O3、SiO2The mass content of the components is as follows:
C ≥30％
Al2O35％～8％
SiO26％～8％。
preferably, the additive also contains CaO and MgO, and the mass content is as follows:
CaO ≥3％
MgO ≥2％。
preferably, the fineness of the steel slag separant is 200-300 meshes.
Preferably, in order to prevent the steel slag separant from precipitating in the steel slag separant preparation tank before spraying, the pH value of the steel slag separant in the steel slag separant preparation tank is controlled to be 4-6.5 while stirring is started in the steel slag separant preparation tank.
Preferably, the steel slag separant is added with polyacrylic acid ammonium salt with the mass of 0.5-0.8% of the total mass of the steel slag separant.
In conclusion, the beneficial effects of the invention are as follows: the steel slag separant has simple composition, low cost and convenient use, and is sprayed on the surface of the oxygen lance, and the steel slag separant forms a protective film on the surface of the oxygen lance, thereby effectively lightening the labor intensity during cleaning, shortening the cleaning time and improving the production capacity.
Detailed Description
The invention is further illustrated by the following examples:
example 1
Steel slag separant for oxygen lance: the density of the steel slag separant is more than or equal to 1.95g/cm3Bonding strength not less than 0.25Mpa, fineness 200 meshes, C, Al in steel slag separant2O3、SiO2The mass content of the components is as follows:
C ≥55％
Al2O35％
SiO28％
adding polyacrylic acid ammonium salt with the mass being 0.5% of the total mass of the steel slag separant into the steel slag separant; controlling the pH value of the steel slag separant to be 4.
Example 2
Steel slag separant for oxygen lance: the density of the steel slag separant is more than or equal to 1.95g/cm3Bonding strength not less than 0.25Mpa, fineness 200 meshes, C, Al in steel slag separant2O3、SiO2The mass contents of CaO and MgO are as follows:
adding polyacrylic acid ammonium salt with the mass being 0.5% of the total mass of the steel slag separant into the steel slag separant; controlling the pH value of the steel slag separant to be 4.
Example 3
Steel slag separant for oxygen lance: the density of the steel slag separant is more than or equal to 1.95g/cm3Bonding strength not less than 0.25Mpa, fineness 200 meshes, C, Al in steel slag separant2O3、SiO2The mass contents of CaO and MgO are as follows:
adding polyacrylic acid ammonium salt with the mass being 0.6% of the total mass of the steel slag separant into the steel slag separant; controlling the pH value of the steel slag separant to be 5.
Example 4
Steel slag separant for oxygen lance: the density of the steel slag separant is more than or equal to 1.95g/cm3Bonding strength not less than 0.25Mpa, fineness 300 meshes, C, Al in steel slag separant2O3、SiO2、CaO, MgO the mass content is as follows:
adding polyacrylic acid ammonium salt with the mass being 0.8% of the total mass of the steel slag separant into the steel slag separant; controlling the pH value of the steel slag separant to be 5.
Claims (5)
1. The steel slag separant for the oxygen lance is characterized in that the density of the steel slag separant is more than or equal to 1.95g/cm3The bonding strength is more than or equal to 0.25 Mpa; c, Al in the steel slag separant2O3、SiO2The mass content of the components is as follows:
C ≥55％
Al2O35％～8％
SiO28％～12％。
2. the steel slag separant for the oxygen lance as claimed in claim 1, wherein: also contains CaO and MgO, and the mass content is as follows: CaO is more than or equal to 3 percent, and MgO is more than or equal to 2 percent.
3. The steel slag separating agent for the oxygen lance as claimed in claim 1 or 2, wherein the fineness of the steel slag separating agent is 200-300 meshes.
4. The steel slag separant for the oxygen lance as claimed in claim 1 or 2, wherein: the pH value of the steel slag separant is 4-6.5.
5. The steel slag separant for the oxygen lance as claimed in claim 1 or 2, wherein: and adding polyacrylate ammonium salt with the mass of 0.5-0.8% of the total mass of the steel slag separant into the steel slag separant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911104259.XA CN110760640B (en) | 2019-11-13 | 2019-11-13 | Steel slag isolating agent for oxygen lance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911104259.XA CN110760640B (en) | 2019-11-13 | 2019-11-13 | Steel slag isolating agent for oxygen lance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110760640A true CN110760640A (en) | 2020-02-07 |
| CN110760640B CN110760640B (en) | 2021-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911104259.XA Active CN110760640B (en) | 2019-11-13 | 2019-11-13 | Steel slag isolating agent for oxygen lance |
Country Status (1)
| Country | Link |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0751821A (en) * | 1993-08-16 | 1995-02-28 | Tokyo Yogyo Co Ltd | Immersed pipe for vacuum degassing apparatus |
| CN1557897A (en) * | 2004-01-17 | 2004-12-29 | 艳 刘 | Oxygen lance spraying paint and device therefor |
| CN1888088A (en) * | 2006-07-03 | 2007-01-03 | 郝功臣 | Ladle lining structure and slag preventing paint |
| CN101003697A (en) * | 2007-01-19 | 2007-07-25 | 丹东宽甸惠镁耐火材料有限公司 | Insulator for steel slag in high temperature |
| CN101445678A (en) * | 2008-12-30 | 2009-06-03 | 沈阳东北大学冶金技术研究所有限公司 | Nonstick coating used on oxygen lance of steelmaking converter |
| CN101654719A (en) * | 2008-08-22 | 2010-02-24 | 周立志 | Steel slag-removing oxygen lance spray coating |
| CN105367092A (en) * | 2014-09-01 | 2016-03-02 | 上海柯瑞冶金炉料有限公司 | Spray coating capable of preventing slag adhesion |
-
2019
- 2019-11-13 CN CN201911104259.XA patent/CN110760640B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0751821A (en) * | 1993-08-16 | 1995-02-28 | Tokyo Yogyo Co Ltd | Immersed pipe for vacuum degassing apparatus |
| CN1557897A (en) * | 2004-01-17 | 2004-12-29 | 艳 刘 | Oxygen lance spraying paint and device therefor |
| CN1888088A (en) * | 2006-07-03 | 2007-01-03 | 郝功臣 | Ladle lining structure and slag preventing paint |
| CN101003697A (en) * | 2007-01-19 | 2007-07-25 | 丹东宽甸惠镁耐火材料有限公司 | Insulator for steel slag in high temperature |
| CN101654719A (en) * | 2008-08-22 | 2010-02-24 | 周立志 | Steel slag-removing oxygen lance spray coating |
| CN101445678A (en) * | 2008-12-30 | 2009-06-03 | 沈阳东北大学冶金技术研究所有限公司 | Nonstick coating used on oxygen lance of steelmaking converter |
| CN105367092A (en) * | 2014-09-01 | 2016-03-02 | 上海柯瑞冶金炉料有限公司 | Spray coating capable of preventing slag adhesion |
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| Publication number | Publication date |
|---|---|
| CN110760640B (en) | 2021-07-09 |
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