CN103184309A - Slag stopping device for converter - Google Patents
Slag stopping device for converter Download PDFInfo
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- CN103184309A CN103184309A CN2013101082786A CN201310108278A CN103184309A CN 103184309 A CN103184309 A CN 103184309A CN 2013101082786 A CN2013101082786 A CN 2013101082786A CN 201310108278 A CN201310108278 A CN 201310108278A CN 103184309 A CN103184309 A CN 103184309A
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- slag
- blocking apparatus
- converter
- tap hole
- slag stopping
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Abstract
The invention provides a slag stopping device applied to the technical field of slag stopping for a converter. A slag stopping device (1) adopts a structure capable of being clamped in a steel tapping hole, and comprises the following components in weight ratio: 5-8 percent of carbon content, 25 plus or minus 5 percent of MgO content, 35 plus or minus 5 percent of Al2O3, 15 plus or minus 5 percent of SiO2 content as well as the balance of impurities, and all the components are evenly mixed and processed into the slag stopping device (1) by a casting molding method. The slag stopping device applied to the converter can be closely combined with the steel tapping hole or slightly sintered, has high resistance to corrosion of high temperature molten slags, and easily melts, that is, the slag stopping device cannot be melted or drop out within the time of 3-5 seconds under the presence of molten slags, but can be quickly melted under the presence of molten steel during the process of tapping steel by shaking the converter.
Description
Technical field
The invention belongs to converter pushing off the slag technical field, more particularly, relate to a kind of slag-blocking apparatus that is applied to converter.
Background technology
In existing converter pushing off the slag technology, mainly adopt the iron sheet slag retaining cap to realize tapping pushing off the slag in early stage purpose.But it is not tight that the iron sheet slag retaining cap contacts with tap hole, comes off during the grate tapping in advance, or directly washed open by slag, fails to play the pushing off the slag effect; And iron sheet slag retaining cap high temperature melting in converting process or is washed out by air-flow, can not play the pushing off the slag effect, causes also that flame and high temperature gas flow wash away fire door in the converter, influences the tap hole life-span; More than 2 cause pushing off the slag poor effect in early stage, slag rephosphorization rate higher (rephosphorization rate=(phosphorus content before SPHC molten steel LF stove end phosphorus content-argon 〉=0.005% stove number)/total stove number of SPHC molten steel), the following quantity of slag about the 5kg/t steel, and every month owing to use the iron sheet slag retaining cap to cause down the slag rephosphorization to change the original sentence to having about 4 stoves of degradation.
Summary of the invention
Technical problem to be solved by this invention is: at deficiency of the prior art, a kind of slag-blocking apparatus that is applied to converter is provided, described slag-blocking apparatus can be combined closely with tap hole or slight sintering, and possessing the high temperature resistance slag corrosion easily melts, slag-blocking apparatus can not melt or come off running into slag 3 to 5 seconds, and when grate is tapped, then can melt rapidly or come off voluntarily when slag-blocking apparatus runs into molten steel.
Solve above-described technical problem, the technical scheme that the present invention takes is:
The present invention is a kind of slag-blocking apparatus that is applied to converter, described slag-blocking apparatus is set to be installed on the structure in the tap hole, it is characterized in that: moiety and the weight ratio of constituents thereof of described slag-blocking apparatus are respectively: carbon content is that 5-8%, MgO content is 25 ± 5%, Al
20
3Content is 35 ± 5%, SiO
2Content is 15 ± 5%, and surplus is impurity, after described each moiety stirs, is processed into slag-blocking apparatus by the cast molding mode.
Described slag-blocking apparatus is set to conical structure, and slag-blocking apparatus comprises device upper surface and device lower surface, and the device lower surface is set to diameter dimension greater than the structure of the diameter dimension of device upper surface.
The fusing point of described slag-blocking apparatus is arranged within 1600 ± 100 ℃ the scope, described slag-blocking apparatus comprises the structure of three kinds of different sizes, the slag-blocking apparatus of described three kinds of different sizes is set to the tap hole early stage with tap hole respectively, tap hole mid-term, the internal diameter size in tap hole later stage cooperates the structure that clamps.
Described slag-blocking apparatus also comprises perforate, and described perforate is set to extend to from the device upper surface structure of device lower surface, and the diameter dimension of perforate is arranged between 30 ± 5mm.
Adopt technical scheme of the present invention, can obtain following beneficial effect:
The slag-blocking apparatus that is applied to converter of the present invention, can combine closely with tap hole or slight sintering, and possessing the high temperature resistance slag corrosion easily melts, slag-blocking apparatus can not melt or come off running into slag 3 to 5 seconds, and when grate is tapped, then can melt rapidly or come off voluntarily when slag-blocking apparatus runs into molten steel.
Description of drawings
Make briefly bright to each accompanying drawing of this specification sheets expressed content and the mark among the figure below:
Fig. 1 is the structural representation of facing of the slag-blocking apparatus that is applied to converter of the present invention;
Fig. 2 is the described plan structure synoptic diagram that is applied to the slag-blocking apparatus of converter of Fig. 1;
Mark among the figure: 1, slag-blocking apparatus; 2, device upper surface; 3, device lower surface; 4, perforate.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are described in further detail:
As accompanying drawing 1, shown in the accompanying drawing 2, the present invention is a kind of slag-blocking apparatus that is applied to converter, described slag-blocking apparatus 1 is set to be installed on the structure in the tap hole, it is characterized in that: moiety and the weight ratio of constituents thereof of described slag-blocking apparatus 1 are respectively: carbon content is 5-8%, MgO content is 25 ± 5%, Al
20
3Content is 35 ± 5%, SiO
2Content is 15 ± 5%, and surplus is impurity, after described each moiety stirs, is processed into slag-blocking apparatus 1 by the cast molding mode.
Described slag-blocking apparatus 1 is set to conical structure, and slag-blocking apparatus 1 comprises device upper surface 2 and device lower surface 3, and the diameter dimension of device lower surface 3 is greater than the diameter dimension of device upper surface 2.
The fusing point of described slag-blocking apparatus 1 is arranged within 1600 ± 100 ℃ the scope, described slag-blocking apparatus 1 comprises the structure of three kinds of different sizes, the slag-blocking apparatus 1 of three kinds of different sizes is set to respectively and the tap hole of tap hole i.e. 0 to 50 stove in earlier stage, tap hole mid-term i.e. 51 to 130 stoves, the tap hole later stage is that (illustrate: tap hole in earlier stage for 131 to 170 stoves, tap hole mid-term, the tap hole later stage refers to that the tap hole diameter dimension increases with tapping stove number and becomes big) the structure that clamps of internal diameter size cooperation.
Described slag-blocking apparatus 1 also comprises perforate 4, and described perforate 4 is set to extend to from device upper surface 2 structure of device lower surface 3, and the diameter dimension of perforate 4 is arranged between 30 ± 5mm.
In slag-blocking apparatus of the present invention, the effect of perforate is when the converter grate is tapped, molten steel can be preferentially by perforate bits because floating over the molten steel face on the light specific gravity, simultaneously molten steel can be washed slag-blocking apparatus rapidly open and normal tapping than heavy, and this slag-blocking apparatus can really play pushing off the slag and not keep off the effect of molten steel.
The slag-blocking apparatus that is applied to converter of the present invention, can combine closely with tap hole or slight sintering, and possessing the high temperature resistance slag corrosion easily melts, slag-blocking apparatus can not melt or come off running into slag 3 to 5 seconds, and when grate is tapped, then can melt rapidly or come off voluntarily when slag-blocking apparatus runs into molten steel.
The slag-blocking apparatus that is applied to converter of the present invention, pushing off the slag is effective, molten steel through LF stove (ladle refining furnace), average rephosphorization rate is reduced to about 4% by 6%, and the slag quantity of slag drops to the 3.7kg/t steel by the 5kg/t steel under the ton steel, can reduce the consumption of later process deoxidation material, wherein the consumption of Al grain is reduced to the 1.41kg/t steel by 1.46 kg/t steel, the about 0.05*15.31=0.76 of cost unit/ton steel can be saved, according to 150,000 tons of calculating of CSP monthly output, about 110,000 yuan of cost can be saved.In earlier stage descend melting down by monthly average that the big rephosphorization of the quantity of slag causes because of converter and be reduced to for 2 times 0 time, change the original sentence to by monthly average 4 stoves and be reduced to 1 stove.
The slag-blocking apparatus that is applied to converter of the present invention, good in economic efficiency: lose 20,000 yuan whenever to melt down a stove, change steel one stove and lose 10,000 yuan of calculating, the moon reduces cost 70,000 yuan.Above-mentioned binomial adds up to 2,160,000 yuan of year benefits.The tap hole life-span is improved 15 heats.
By reference to the accompanying drawings the present invention has been carried out exemplary description above; obviously the concrete realization of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or without improving design of the present invention and technical scheme are directly applied to other occasions, all in protection scope of the present invention.
Claims (4)
1. slag-blocking apparatus that is applied to converter, described slag-blocking apparatus (1) is set to be installed on the structure in the tap hole, it is characterized in that: moiety and the weight ratio of constituents thereof of described slag-blocking apparatus (1) are respectively: carbon content is that 5-8%, MgO content is 25 ± 5%, Al
20
3Content is 35 ± 5%, SiO
2Content is 15 ± 5%, and surplus is impurity, after described each moiety stirs, is processed into slag-blocking apparatus (1) by the cast molding mode.
2. the slag-blocking apparatus that is applied to converter according to claim 1, it is characterized in that: described slag-blocking apparatus (1) is set to conical structure, slag-blocking apparatus (1) comprises device upper surface (2) and device lower surface (3), and device lower surface (3) is set to diameter dimension greater than the structure of the diameter dimension of device upper surface (2).
3. the slag-blocking apparatus that is applied to converter according to claim 1 and 2, it is characterized in that: the fusing point of described slag-blocking apparatus (1) is arranged within 1600 ± 100 ℃ the scope, described slag-blocking apparatus (1) comprises the structure of three kinds of different sizes, the slag-blocking apparatus of three kinds of different sizes (1) is set to the tap hole early stage with tap hole respectively, tap hole mid-term, the internal diameter size in tap hole later stage cooperates the structure that clamps.
4. the slag-blocking apparatus that is applied to converter according to claim 3, it is characterized in that: described slag-blocking apparatus (1) also comprises perforate (4), described perforate (4) is set to extend to from device upper surface (2) structure of device lower surface (3), and the diameter dimension of perforate (4) is arranged between 30 ± 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310108278.6A CN103184309B (en) | 2013-03-30 | 2013-03-30 | Slag stopping device for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310108278.6A CN103184309B (en) | 2013-03-30 | 2013-03-30 | Slag stopping device for converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103184309A true CN103184309A (en) | 2013-07-03 |
| CN103184309B CN103184309B (en) | 2014-09-10 |
Family
ID=48675755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310108278.6A Active CN103184309B (en) | 2013-03-30 | 2013-03-30 | Slag stopping device for converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103184309B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946848A (en) * | 2015-07-20 | 2015-09-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Slag stopping plug of converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6241941B1 (en) * | 1998-10-17 | 2001-06-05 | Berthold Stilkerieg | Device for avoiding contamination of the tapped steel by flush slag in a tiltable converter with improved composition of the material |
| JP2005113192A (en) * | 2003-10-07 | 2005-04-28 | Sumitomo Metal Ind Ltd | Slag flow-out prevention tool in converter |
| CN101413046A (en) * | 2008-11-27 | 2009-04-22 | 莱芜钢铁股份有限公司 | Homogeneous slag bridge for converter tapping |
| CN202688360U (en) * | 2012-04-26 | 2013-01-23 | 李宏亮 | Converter steel tapping slag stopping device |
-
2013
- 2013-03-30 CN CN201310108278.6A patent/CN103184309B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6241941B1 (en) * | 1998-10-17 | 2001-06-05 | Berthold Stilkerieg | Device for avoiding contamination of the tapped steel by flush slag in a tiltable converter with improved composition of the material |
| JP2005113192A (en) * | 2003-10-07 | 2005-04-28 | Sumitomo Metal Ind Ltd | Slag flow-out prevention tool in converter |
| CN101413046A (en) * | 2008-11-27 | 2009-04-22 | 莱芜钢铁股份有限公司 | Homogeneous slag bridge for converter tapping |
| CN202688360U (en) * | 2012-04-26 | 2013-01-23 | 李宏亮 | Converter steel tapping slag stopping device |
Non-Patent Citations (2)
| Title |
|---|
| 毛尽华等: "20t转炉"三位一体"挡渣技术应用实践", 《河南冶金》 * |
| 肖利等: "转炉用挡渣塞", 《耐火材料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946848A (en) * | 2015-07-20 | 2015-09-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Slag stopping plug of converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103184309B (en) | 2014-09-10 |
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