CN1107820A - Filler for eccentric bottom tapping hole of super-high-power electric furnace - Google Patents
Filler for eccentric bottom tapping hole of super-high-power electric furnace Download PDFInfo
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- CN1107820A CN1107820A CN 94112660 CN94112660A CN1107820A CN 1107820 A CN1107820 A CN 1107820A CN 94112660 CN94112660 CN 94112660 CN 94112660 A CN94112660 A CN 94112660A CN 1107820 A CN1107820 A CN 1107820A
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- stopping composition
- mgo
- electric furnace
- filler
- screening
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Abstract
The new-type filler featuring simple productive technology, low cost, stable property and high pouring rate of ladle is divided into two kinds for upper and lower layers respectively. The upper-layer one is made of waste Mg-C brick containing C (>10%) and MgO (>65%), or sintered magnesite, whose MgO content is >80% or magnesium slag after electric smelting through breaking and sieving adding graphite powder (15%). The lower-layer one is made of said sintered magnesite or magnesium slag after electric smelting through breaking and sieving.
Description
The invention belongs to technical field of refractory materials, be specifically related to a kind of filler for eccentric bottom tapping hole of super-high-power electric furnace.
Electric Furnace Steelmaking maximizes towards electric furnace in the world at present, the direction of melting develops fast, modes such as large-scale eccentric bottom tapping hole of super-high-power electric furnace tapping mode and the tapping of electric furnace sidewall relatively have more advantage, be widely adopted, this tapping mode is to depart from the centre opening in the electric furnace bottom, opening part is built refractory brick by laying bricks or stones and is formed tap hole, but the tap hole lower end is provided with the baffle plate of a switch, when making steel, this baffle plate is sealed tap hole, and on baffle plate, filling fire resisting material in the tap hole, molten steel is held, and can not cause the badly bleeding accident, during tapping, only need the tap hole under shield is opened, stopping composition drops down automatically, makes tap hole unimpeded, molten steel flows out along tap hole, reaches to open the purpose of watering.For this reason, when should possessing resistance to elevated temperatures, stopping composition also should possess the characteristic that is not sintered, and molten steel can not bore down between filler particle, stopping composition can flow out under self gravitation and the effect of molten steel pressure automatically when the tap hole under shield is opened, form the molten steel automatic casting, reach the purpose of tapping.
At present, the eccentric bottom tapping hole of super-high-power electric furnace stopping composition generally adopts the stopping composition of the ANKERFILL-NN77 trade mark that veitscher factory of Austrian magnesium difficult to understand company produces, and its chemical composition is MgO, Al
2O
3, Fe
2O
3, CaO, SiO
2, weight percent is followed successively by 86,0.5,5.5,7.0,1.0, and granularity is 2-5mm, volume density 1.7Kg/dm
3, use 1750 ℃ of the limit.The TERfiu-BT trade mark stopping composition that Austria RADEX factory of magnesium company produces, its chemical composition is MgO, Fe
2O
3, SiO
2, its weight percent is followed successively by 51,9,40, and granularity is 0.5-0.6mm.
By applied analysis, above stopping composition complex manufacturing, cost is higher.
The objective of the invention is to simplify the production technique of stopping composition, reduce product cost, a kind of high performance filler for tap holes is provided.
The technical solution used in the present invention is, filler for tap holes is divided into upper and lower two-layer by the composition difference, and the upper strata stopping composition accounts for the space of tap hole 1/4, in the steelmaking process directly and the molten steel in the ladle contact, lower floor's stopping composition accounts for the space of tap hole 3/4.The upper strata stopping composition adopts C content 〉=10%, the useless magnesia carbon brick of MgO content 〉=65% is made through broken, screening, also can adopt the magnesite clinker of MgO content 〉=80% or electric molten magnesite slag crust material to be mixed and made into it through Graphite Powder 99 broken, that sieve, add 15%C content 〉=90%.Its physical and chemical index is: chemical composition: MgO, C, SiO
2, Al
2O
3, Fe
2O
3, the CaO weight percent is followed successively by 70-85,7-20,1-3,3-5,1-3,1-5, granularity is 0-5mm.Magnesite clinker of the stopping composition employing MgO of lower floor content 〉=80% or electric molten magnesite slag crust material are through fragmentation, and screening is made, and physical and chemical index is: chemical composition: MgO, SiO
2, Al
2O
3, Fe
2O
3, the CaO weight percent is followed successively by: 80-95,1.5-4,2-6,0.1-4,0.1-6, granularity is 0-5mm.
Advantage of the present invention is that waste refractory materials is converted into filler for tap holes, has reduced production cost, economizes on resources, and production technique is simple, and product performance are reliable.
The present invention is described in further detail below in conjunction with specific embodiment.
C content 〉=10% that electric furnace or ladle are removed, the useless magnesia carbon brick of MgO content 〉=65%, remove impurity, after the palate crusher fragmentation, again by pair roller or hammer crushing crusher machine, then through screening, get the particle of 0-5mm, promptly can be used as the upper strata stopping composition, the upper strata stopping composition also can adopt the magnesite clinker of MgO content 〉=80% or electric molten magnesite slag crust material through palate crusher and roll crusher or hammer crushing crusher machine, get the particle of 0-5mm through screening, again the Graphite Powder 99 and the above-mentioned particle of C content 〉=90% are made by 15% and 85% mixed.
More than two kinds of embodiment physical and chemical index of finally making the upper strata stopping composition be chemical composition: MgO, C, SiO
2, Al
2O
3, Fe
2O
3, CaO, its weight percent is followed successively by: 78.31,12.57,1.96,4.59,1.08,1.41, granularity is 0-5mm.
Utilize the magnesite clinker or the fragmentation of electric molten magnesite slag crust material process palate crusher of MgO content 〉=80%, again through roll crusher or the screening of hammer crushing crusher machine process, get the particle of 0-5mm, promptly can be used as lower floor's stopping composition, its physical and chemical index is: granularity is 0-5mm, does its chemical composition of raw material with magnesite clinker: MgO, SiO
2, Al
2O
3, Fe
2O
3, the CaO weight percent is followed successively by 91.55,2.65,3.37,0.55,1.34.With electric smelting slag crust material is its chemical composition of raw material: MgO, SiO
2, Al
2O
3, Fe
2O
3, the CaO weight percent is followed successively by: 92.41,1.67,4.42,0.79,0.42.
Claims (2)
1, filler for eccentric bottom tapping hole of super-high-power electric furnace is characterized in that: this stopping composition is divided into upper and lower two-layer being filled in the tap hole, and the upper strata stopping composition directly contacts with molten steel in steelmaking process, and its physical and chemical index is: chemical composition: MgO, C, SiO
2, Al
2O
3, Fe
2O
3, the CaO weight percent is followed successively by 70-85,7-20,1-3,3-5,1-3,1-5, granularity is 0-5mm.
2, stopping composition as claimed in claim 1, it is characterized in that: the upper strata stopping composition adopts C content 〉=10%, the useless magnesia carbon brick of MgO content 〉=65% is through fragmentation, screening is made, also can adopt the magnesite clinker of MgO content 〉=80% or electric molten magnesite slag crust material through broken, screening, add 15% graphite branch again and make, lower floor's stopping composition adopts the magnesite clinker of MgO content 〉=80% or electric molten magnesite slag crust material through fragmentation, and screening is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94112660 CN1107820A (en) | 1994-12-01 | 1994-12-01 | Filler for eccentric bottom tapping hole of super-high-power electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94112660 CN1107820A (en) | 1994-12-01 | 1994-12-01 | Filler for eccentric bottom tapping hole of super-high-power electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1107820A true CN1107820A (en) | 1995-09-06 |
Family
ID=5036332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94112660 Pending CN1107820A (en) | 1994-12-01 | 1994-12-01 | Filler for eccentric bottom tapping hole of super-high-power electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1107820A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312074C (en) * | 2005-09-22 | 2007-04-25 | 郑州振东耐磨材料有限公司 | Waste magnesia carbon brick regenerating and utilizing process |
| CN102153358A (en) * | 2010-12-24 | 2011-08-17 | 攀枝花钢城集团有限公司 | Slag dart pouring material used for steel-making and vanadium-extracting converter, slag dart and preparation method thereof |
| CN102741640A (en) * | 2010-01-15 | 2012-10-17 | 捷恩智株式会社 | Melt container |
| CN106242600A (en) * | 2016-08-09 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of tapping hole filler and fill method thereof |
| CN111705180A (en) * | 2020-06-30 | 2020-09-25 | 武汉钢铁有限公司 | Steel tapping hole filler and filling method |
-
1994
- 1994-12-01 CN CN 94112660 patent/CN1107820A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312074C (en) * | 2005-09-22 | 2007-04-25 | 郑州振东耐磨材料有限公司 | Waste magnesia carbon brick regenerating and utilizing process |
| CN102741640A (en) * | 2010-01-15 | 2012-10-17 | 捷恩智株式会社 | Melt container |
| CN102153358A (en) * | 2010-12-24 | 2011-08-17 | 攀枝花钢城集团有限公司 | Slag dart pouring material used for steel-making and vanadium-extracting converter, slag dart and preparation method thereof |
| CN102153358B (en) * | 2010-12-24 | 2013-09-18 | 攀枝花钢城集团有限公司 | Slag dart pouring material used for steel-making and vanadium-extracting converter, slag dart and preparation method thereof |
| CN106242600A (en) * | 2016-08-09 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of tapping hole filler and fill method thereof |
| CN106242600B (en) * | 2016-08-09 | 2019-10-25 | 武汉钢铁有限公司 | A kind of tapping hole filler and its fill method |
| CN111705180A (en) * | 2020-06-30 | 2020-09-25 | 武汉钢铁有限公司 | Steel tapping hole filler and filling method |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |