CN1546420A - Rapid repair material for tap hole brick of revolving furnace and electric furnace - Google Patents
Rapid repair material for tap hole brick of revolving furnace and electric furnace Download PDFInfo
- Publication number
- CN1546420A CN1546420A CNA2003101101938A CN200310110193A CN1546420A CN 1546420 A CN1546420 A CN 1546420A CN A2003101101938 A CNA2003101101938 A CN A2003101101938A CN 200310110193 A CN200310110193 A CN 200310110193A CN 1546420 A CN1546420 A CN 1546420A
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- CN
- China
- Prior art keywords
- repair material
- electric furnace
- tap holes
- rapid repair
- magnesia
- Prior art date
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a steel-tapping hole brick quick-speed mending material for revolving furnaces and electric furnaces by using magnetite as principal raw material, wherein the weight percentage content of the raw materials are, chromium hemitrioxide 5-12%, microcosmic salt bonding agent 3%-7%, agglutinant 1-4%, and magnesite for the rest. The invention realizes simple mending process, easy modeling, good fluidity, short mending time, fine anti-detonating property, high degree of hardness and erosion resistance.
Description
Technical field:
The present invention relates to a kind of refractory materials, relate in particular to a kind of converter, tap holes of electric furnace brick rapid repair material of being used for.
Background technology:
The tap hole lining brick is subjected to the high-temperature molten steel erosion and temperature is jumpy influences, and damages very fast.The converter current life-span is all more than 5000 heats, and the tap hole life-span has only about 100 times, can not be synchronous with life of converter.Can make tap hole pushing off the slag effect bad after the tap hole dilatation, the tapping time shortens greatly, and molten steel easily produces whirlpool, the stream that looses, and all these all can influence the smelting and the quality of molten steel.Therefore arrive to a certain degree when the tap hole dilatation, must in time carry out the replacing formula and safeguard the tap hole lining brick.The way that past generally adopts is to change the lining brick of tap hole, and build by laying bricks or stones again, but this way has following shortcoming: the old lining brick of the first can not utilize again, is unfavorable for reducing the cost of anti-the material; It two is because converter temperature height, and operative employee's labour intensity is bigger; They are three years old, more seriously the replacing time is long, generally more than 30min, have influence on the rhythm of production of former process such as blast furnace, later process such as continuous casting sometimes, indirect economic loss is very big, Chinese patent 011336404 discloses a kind of " large-area self-flowing converter repairing material ", this repair material is done raw material with magnesite clinker, rhombspar, adopt metasilicate and phosphoric acid salt to make wedding agent, through mixed grind, stir to form a kind of loose, dried shape, evenly gather materials, the employing of this repair material makes energy-conservation, pollution-free, the long service life of the hot benefit of large face of converter.
Summary of the invention: repair the time in order to shorten the tap hole lining brick, prolong lining brick work-ing life, reduce production costs, the purpose of this invention is to provide a raw material and be easy to get, preparation, use the simple converter of technology, tap holes of electric furnace brick rapid repair material.
Technical scheme of the present invention realizes in the following manner:
A kind of converter, tap holes of electric furnace brick rapid repair material, it is to make main raw material with magnesia, is equipped with auxiliary material again, its each composition of raw materials weight percentage is as follows:
Chromic oxide 5～12%
Phosphate binders 3～7%
Agglutinant 1～4
The magnesia surplus
Magnesia particle diameter≤5mm in the above-mentioned repair material prescription.
U.S. sand in the above-mentioned repair material prescription comprises magnesia powder, fine powder particle diameter≤0.088mm.
Phosphate binders in the above-mentioned repair material prescription is selected from one or more of Sodium hexametaphosphate 99, tripoly phosphate sodium STPP.
Agglutinant is selected from one or more of iron scale, fluorite, boride, calcium aluminate in the above-mentioned repair material prescription.
The physical and chemical index of each raw material composition is as follows in the above-mentioned repair material:
Magnesia: (Mgo% 〉=98 Cao≤1.2 volume density (g/cm
3) 〉=3.5).
Chromic oxide: (Cr
2O
3% 〉=99).
Sodium hexametaphosphate 99: total phosphate is (with P
2O
3Meter) % 〉=68
Nonactive phosphoric acid salt is (with P
2O
3Meter) %≤7.5
Water-insoluble %≤0.06
PH value 5.8～7.0
Calcium aluminate Al
2O
3%:70～73 Cao%:20～26
Above-mentioned repair material preparation technology as:
1.. raw materials used standard on request detects, and can use after qualified.
2.. magnesia piece material on request granularity be processed into the pack standby.
3.. by in the prescription than the various materials of weighing, drop in the forced mixer and mix, mixing time is 10min～15min.
4.. mixed siccative is packed the necessary water-tight of wrapping material, protection against the tide.
The repairing mechanism of repair material of the present invention is: this hot-patch material contains 60～75 magnesia to similar by repairing magnesia brick master material, be easy to compatible, contain 3～10% phosphate binders in the repair material, this wedding agent is the thermohardening wedding agent, can utilize the very fast generation hardness of waste heat of stove, agglutinant is to make material utilize the further sintering of liquid steel temperature in tapping process in the repair material, remedies the strength degradation of phosphate binders; The chromic oxide that is added is a kind of high refractoriness material, can improve the resistance to fouling of material.Reasonably material constitutes, and material is had can be bonded together with the old lining brick of tap hole, and has certain anti-erosion, scour resistance.
Positively effect of the present invention is:
Repair technology is simple, and saving of labor, material-saving adopt rapid repair material of the present invention, need not remove the tap hole second-hand brick, only needs to insert a steel pipe in tap hole, and the slit that this material is poured into steel pipe and tap hole second-hand brick gets final product.Just can finish about this way 10min.
Repair material of the present invention belongs to unshape refractory, is easy to appearance, good fluidity, and the repairing time is short, and anti-cracking property is good, hardness height, anti-erosion.Every repairing once can make electric furnace or converter tapping more than 20 times.
Embodiment: the invention will be further described below in conjunction with embodiment:
Embodiment one:
Magnesia (5mm) 65%
Magnesia powder (0.088mm) 23%
Chromic oxide 6%
Sodium hexametaphosphate 99 3%
Calcium aluminate 3%
By the above-mentioned prescription raw material of weighing, drop in the forced mixer and mix, mixing time is 10min～15min; Mixed siccative is packed the necessary water-tight of wrapping material, protection against the tide.
Embodiment two: magnesia (4mm) 70%
Magnesia powder (0.018mm) 10%
Chromic oxide 12%
Sodium hexametaphosphate 99+tripoly phosphate sodium STPP 7%
Calcium aluminate+iron scale+borax 1%
Embodiment three: magnesia (1mm) 85%
Chromic oxide 8%
Sodium hexametaphosphate 99+tripoly phosphate sodium STPP 5%
Calcium aluminate+iron scale+fluorite 4%
Embodiment four: magnesia (3mm) 70%
Magnesia powder (0.018mm) 15%
Chromic oxide 5%
Sodium hexametaphosphate 99+tripoly phosphate sodium STPP 7%
Calcium aluminate+iron scale+fluorite+borax 3%
Preparation technology adds detonation suppressor 0.1% with embodiment one
Used raw-material physical and chemical index in the material
1.. magnesia 60～75%
Mgo% 〉=98 Cao≤1.2 volume density (g/cm
3) 〉=3.5
2.. chromic oxide
Cr
2O
3％≥99
3.. Sodium hexametaphosphate 99
Total phosphate (NaP
2O
3) % 〉=68
Non-smelting acid phosphate (NaP
2O
3) %≤7.5
Water-insoluble %≤0.06
PH value 5.8～7.0
4.. calcium aluminate
Al
2O
3％：70～73??Cao：20～26
Physicochemical property by the above proportioning product detects following each table of data:
Table one: the volume density of product when equality of temperature not
| Temperature | Volume density (g/cm 3) | ||
| ??110℃×24h | ????3.06 | ????2.99 | ????2.96 |
| ??1100℃×3h | ????2.82 | ????2.85 | ????2.98 |
Table two: the compressive strength of product when differing temps
| Temperature | Compressive strength (Mpa) | ||
| Embodiment one | Embodiment two | Embodiment three | |
| ?110℃×24h | ????51.2 | ????55.2 | ????52.8 |
| ?1500℃×3h | ????30.8 | ????29.0 | ????26.8 |
| ?1100℃×3h | ????34.0 | ????35.6 | ????37.6 |
Table three: the folding strength of product when differing temps
| Temperature | Folding strength (Mpa) | ||
| Embodiment one | Embodiment two | Embodiment three | |
| ??110℃× ??24h | ????14.5 | ????12.4 | ????12.6 |
| ??1100℃× ??3h | ????5.8 | ????6.7 | ????8.5 |
Table four: product is line velocity of variation % when 1500 ℃ * 3h temperature
| Temperature * time | Line velocity of variation (%) | ||
| ??1500℃×3h | Embodiment one | Embodiment two | Embodiment three |
| ??+0.16 | ??+0.14 | ????+0.11 | |
Claims (10)
1, a kind of converter, tap holes of electric furnace brick rapid repair material, it is to make main raw material with magnesia, is equipped with auxiliary material again, its each raw material counterweight amount percentage composition is as follows:
Chromic oxide 5～12%
Phosphate binders 3～7%
Agglutinant 1～4
The magnesia surplus
2, converter according to claim 1, tap holes of electric furnace brick rapid repair material is characterized in that: the magnesia particle diameter≤5mm in the repair material prescription.
3, converter according to claim 1 and 2, tap holes of electric furnace brick rapid repair material is characterized in that: the magnesia in the repair material prescription comprises magnesia powder, fine powder particle diameter≤0.088mm.
4, converter according to claim 3, tap holes of electric furnace brick rapid repair material is characterized in that: the phosphate binders in the repair material prescription is selected from one or more of Sodium hexametaphosphate 99, tripoly phosphate sodium STPP.
5, converter according to claim 4, tap holes of electric furnace brick rapid repair material is characterized in that: agglutinant is selected from one or more of iron scale, fluorite, boride, calcium aluminate in the repair material prescription.
6, it is characterized in that according to claim 4 or 5 described converters, tap holes of electric furnace brick rapid repair material: magnesia: (Mgo%) equal 98 at least,
Cao≤1.2, volume density (g/cm
3) equal 3.5 at least.
7, converter according to claim 6, tap holes of electric furnace brick rapid repair material is characterized in that: chromic oxide (Cr
2O
3) content is at least: 99%.
8, converter according to claim 7, tap holes of electric furnace brick rapid repair material is characterized in that: Sodium hexametaphosphate 99: total phosphate is (with P
2O
3Meter) % is at least 68.
9, converter according to claim 8, tap holes of electric furnace brick rapid repair material is characterized in that: nonactive phosphoric acid salt is (with P
2O
3Meter) %≤7.5
10, converter according to claim 9, tap holes of electric furnace brick rapid repair material is characterized in that: calcium aluminate (Al
2O
3%): 70～73 Cao%:20～26.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101101938A CN1546420A (en) | 2003-12-03 | 2003-12-03 | Rapid repair material for tap hole brick of revolving furnace and electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101101938A CN1546420A (en) | 2003-12-03 | 2003-12-03 | Rapid repair material for tap hole brick of revolving furnace and electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1546420A true CN1546420A (en) | 2004-11-17 |
Family
ID=34335551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101101938A Pending CN1546420A (en) | 2003-12-03 | 2003-12-03 | Rapid repair material for tap hole brick of revolving furnace and electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1546420A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397022C (en) * | 2005-03-11 | 2008-06-25 | 贵阳铝镁设计研究院 | Processing method for wall crack of anode roaster |
| CN101537487B (en) * | 2008-03-21 | 2010-12-29 | 宝钢集团上海梅山有限公司 | Ladle liner restoring material |
| CN102807381A (en) * | 2012-08-22 | 2012-12-05 | 武汉钢铁(集团)公司 | Self-flow type large-area batching mix for revolving furnace and methods for preparing and using self-flow type large-area mix |
| CN101792322B (en) * | 2010-02-23 | 2013-03-13 | 上海柯瑞冶金炉料有限公司 | Environment-friendly aqueous long-life self-flowing repairing mix for converter and preparation method thereof |
| CN103373854A (en) * | 2012-04-20 | 2013-10-30 | 上海梅山钢铁股份有限公司 | Large-surface repairing material for converter and preparation method of large-surface repairing material |
| CN103602780A (en) * | 2013-10-21 | 2014-02-26 | 张家港联峰钢铁研究所有限公司 | Replacing method of converter tap hole |
| CN103880452A (en) * | 2014-03-31 | 2014-06-25 | 沈阳金安铸造材料有限公司 | Unshaped refractory material |
| CN110204317A (en) * | 2018-02-28 | 2019-09-06 | 洛阳轩石新材料科技有限公司 | A kind of vapor-permeable type hot-patch material and construction method for vulcanizing air brick of steel ladle online |
-
2003
- 2003-12-03 CN CNA2003101101938A patent/CN1546420A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397022C (en) * | 2005-03-11 | 2008-06-25 | 贵阳铝镁设计研究院 | Processing method for wall crack of anode roaster |
| CN101537487B (en) * | 2008-03-21 | 2010-12-29 | 宝钢集团上海梅山有限公司 | Ladle liner restoring material |
| CN101792322B (en) * | 2010-02-23 | 2013-03-13 | 上海柯瑞冶金炉料有限公司 | Environment-friendly aqueous long-life self-flowing repairing mix for converter and preparation method thereof |
| CN103373854A (en) * | 2012-04-20 | 2013-10-30 | 上海梅山钢铁股份有限公司 | Large-surface repairing material for converter and preparation method of large-surface repairing material |
| CN102807381A (en) * | 2012-08-22 | 2012-12-05 | 武汉钢铁(集团)公司 | Self-flow type large-area batching mix for revolving furnace and methods for preparing and using self-flow type large-area mix |
| CN103602780A (en) * | 2013-10-21 | 2014-02-26 | 张家港联峰钢铁研究所有限公司 | Replacing method of converter tap hole |
| CN103880452A (en) * | 2014-03-31 | 2014-06-25 | 沈阳金安铸造材料有限公司 | Unshaped refractory material |
| CN103880452B (en) * | 2014-03-31 | 2015-05-20 | 沈阳金安铸造材料有限公司 | Unshaped refractory material |
| CN110204317A (en) * | 2018-02-28 | 2019-09-06 | 洛阳轩石新材料科技有限公司 | A kind of vapor-permeable type hot-patch material and construction method for vulcanizing air brick of steel ladle online |
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