CN102401569A - Tap hole of electric furnace - Google Patents
Tap hole of electric furnace Download PDFInfo
- Publication number
- CN102401569A CN102401569A CN201110376550XA CN201110376550A CN102401569A CN 102401569 A CN102401569 A CN 102401569A CN 201110376550X A CN201110376550X A CN 201110376550XA CN 201110376550 A CN201110376550 A CN 201110376550A CN 102401569 A CN102401569 A CN 102401569A
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- CN
- China
- Prior art keywords
- electric furnace
- tapping hole
- magnesia brick
- brick layer
- permanent
- 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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- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a tap hole of an electric furnace, which comprises a permanent magnesite brick layer, a semi-permanent magnesite brick layer, an SiC layer, a molten iron channel and an iron notch frame, wherein the molten iron channel sequentially passes through the permanent magnesite brick layer, the semi-permanent magnesite brick layer and the SiC layer from the inside to the outside of the electric furnace; and the iron notch frame is arranged on the outer wall of the electric furnace. The service life of the tap hole of the electric furnace is prolonged.
Description
Technical field
The invention belongs to field of metallurgy, specifically, relate to a kind of electric furnace tapping hole that is used for electric furnace.
Background technology
Adopt electric furnace when smelting such as raw materials such as titanium ores, molten iron flows out from the tapping hole of restoration of lower stack discontinuously.Wherein, when tapping a blast furnace end, adopt clay gun to block tapping hole usually at every turn.Because being carried out maintenance, tapping hole need be in blowing out reduces burner hearth just can carry out after the molten steel solidification cooling in molten iron temperature and the tapping hole passage, so, press for the life-span of improving the electric furnace tapping hole in order to reduce influence to producing.
At present, the electric furnace tapping hole mainly adopts full magnesia brick tapping hole.Magnesia brick has higher refractoriness and refractoriness under load, but the thermal shock resistance of magnesia brick is poor.Therefore, be interrupted under the situation of tapping a blast furnace at tapping hole, the magnesia brick of full magnesia brick tapping hole is very easily cracked, efflorescence and corroded by molten iron.In addition, when using clay gun that tapping hole is blocked up, the extruding of clay gun has aggravated the damage of full magnesia brick tapping hole magnesia brick.Therefore, full magnesia brick tapping hole is shorter service life, has only about 120 times.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and a kind of electric furnace tapping hole with life-saving is provided.
Electric furnace tapping hole according to the present invention comprises permanent magnesia brick layer, semipermanent magnesia brick layer, SiC layer, molten iron passage and iron mouth frame; The molten iron passage by in the electric furnace outside electric furnace successively through permanent magnesia brick layer, semipermanent magnesia brick layer and SiC layer, iron mouth frame is arranged at the electric furnace outer wall.
According to embodiments of the invention, the thickness of said SiC layer can be 500mm～600mm.
According to embodiments of the invention, said electric furnace tapping hole can also comprise the water-cooling wall that is arranged on iron mouth frame inboard.
According to embodiments of the invention, said electric furnace tapping hole can also comprise the extension slag blanket that is arranged on the permanent magnesia brick layer.
According to embodiments of the invention, said extension slag blanket can comprise 80%～90% TiO
2, 1%～5% MgO, 2%～5% SiO
2, 1%～4% MnO, 1%～3% CaO and 1%～3% Al
2O
3
According to embodiments of the invention, said electric furnace tapping hole can also comprise the iron notch that is arranged on iron mouth frame below.
Electric furnace tapping hole according to the present invention has good thermal shock resistance and is convenient to maintenance, thereby can have the life-span of prolongation.
Description of drawings
The following description of the exemplary embodiment of carrying out in conjunction with the drawings, these and/or other aspect of the present invention and advantage will become clear and be easier to and understand, wherein:
Fig. 1 is the cutaway view of electric furnace tapping hole according to an exemplary embodiment of the present invention.
The specific embodiment
Describe electric furnace tapping hole according to an exemplary embodiment of the present invention below with reference to accompanying drawings in detail.
Fig. 1 is the cutaway view of electric furnace tapping hole according to an exemplary embodiment of the present invention.As shown in Figure 1, the electric furnace tapping hole comprises permanent magnesia brick layer 1, semipermanent magnesia brick layer 2, SiC layer 3, molten iron passage 4 and iron mouth frame 5 according to an exemplary embodiment of the present invention.Molten iron passage 4 is formed in permanent magnesia brick layer 1, semipermanent magnesia brick layer 2 and the SiC layer 3, that is, when electric furnace tapping hole according to the present invention flowed out, molten iron was successively through permanent magnesia brick layer 1, semipermanent magnesia brick layer 2 and SiC layer 3 at molten iron.Iron mouth frame 5 is arranged at the electric furnace outer wall.
According to exemplary embodiment of the present invention; Because SiC layer 3 thermal shock resistance of tapping hole are better; So the damage that can avoid for example full magnesia brick tapping hole to cause because of the thermal shock resistance difference; And can cushion the clay gun of blocking up squeezing action, therefore can prolong the life-span of electric furnace tapping hole tapping hole brick layer.Here, can form SiC layer 3 through cast SiC.The thickness of SiC layer 3 can be 500mm～600mm.In this thickness range, when the faying face between semipermanent magnesia brick layer 2 and the SiC layer 3 receives the erosion of molten iron, can easily adopt clay gun that the faying face that weathers between semipermanent magnesia brick layer 2 and the SiC layer 3 is repaired.
Electric furnace tapping hole according to an exemplary embodiment of the present invention, molten iron temperature when flowing to the faying face of semipermanent magnesia brick layer 2 and SiC layer 3 is relatively low, therefore can reduce the erosion of molten iron to this faying face, thereby can prolong the life-span of electric furnace tapping hole.
According to exemplary embodiment of the present invention, can when building furnace lining by laying bricks or stones, build permanent magnesia brick layer 1 by laying bricks or stones with magnesia brick, can build the part of molten iron passage 4 in permanent magnesia brick layer 1 by laying bricks or stones simultaneously.
Exemplary embodiment according to the present invention is provided with semipermanent magnesia brick layer 2, and semipermanent magnesia brick layer 2 is identical with the material of permanent magnesia brick layer 1.Semipermanent magnesia brick layer 2 is with the difference of permanent magnesia brick layer 1; Permanent magnesia brick layer 1 is difficult for removing and rebuilding; And semipermanent magnesia brick layer 2 is convenient to from the electric furnace outside remove and rebuild and have the long life-span when repairing tapping hole, therefore is known as semipermanent magnesia brick layer.Make electric furnace tapping hole according to the present invention be convenient to maintenance because of being provided with semipermanent magnesia brick layer 2.
According to exemplary embodiment of the present invention, can the water-cooling wall (not shown) be set in the inboard of iron mouth frame 5, for example, water-cooling wall can be arranged on both sides and the top in the iron mouth frame 5.Water-cooling wall can make refractory masses (for example, semipermanent magnesia brick layer 2 and the SiC layer 3) cooling of tapping hole, thus alleviate molten iron to the erosion of the refractory material of molten iron passage 4, permeate and wash away.
Refer again to Fig. 1, can on permanent magnesia brick layer 1, form and hang slag blanket 6 alleviating high temperature liquid iron in the electric furnace, thereby prolong the life-span of electric furnace tapping hole the corrosion function of permanent magnesia brick layer 1.Can in smelting process, will hang slag blanket 6 through the adjustment smelting process is formed on the molten iron passage 4 permanent magnesia brick layer 1 on every side.For example, can be according to the mineral of being smelted, the extension slag blanket 6 that will have corresponding composition is formed on the permanent magnesia brick layer 1.When smelting titanium slag, hang slag blanket 6 and can comprise 80%～90% TiO
2, 1%～5% MgO, 2%～5% SiO
2, 1%～4% MnO, 1%～3% CaO and 1%～3% Al
2O
3
In addition, can below iron mouth frame 5, set out metal trough 7 flowing with the guiding molten iron.
In addition; In order to prevent the faying face of strong molten iron infiltrate semipermanent magnesia brick layer of penetrating power 2 and SiC layer 3; Electric current makes water-cooling wall and iron notch 7 form the loop breakdown water-cooling wall through the molten iron of infiltration when causing smelting, and can between water-cooling wall and iron notch 7 and furnace wall, insulating materials be set.
The electric furnace tapping hole can be applied to the electric furnace of smelting titanium slag according to an exemplary embodiment of the present invention, also can be applied to produce the electric furnace of ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicomangan etc.
The electric furnace tapping hole can have the service life more than 600 times according to an exemplary embodiment of the present invention.
Claims (6)
1. electric furnace tapping hole; It is characterized in that; Said electric furnace tapping hole comprises permanent magnesia brick layer, semipermanent magnesia brick layer, SiC layer, molten iron passage and iron mouth frame; The molten iron passage by in the electric furnace outside electric furnace successively through permanent magnesia brick layer, semipermanent magnesia brick layer and SiC layer, iron mouth frame is arranged at the electric furnace outer wall.
2. electric furnace tapping hole as claimed in claim 1 is characterized in that, the thickness of said SiC layer is 500mm～600mm.
3. electric furnace tapping hole as claimed in claim 1 is characterized in that, said electric furnace tapping hole also comprises the water-cooling wall that is arranged on iron mouth frame inboard.
4. electric furnace tapping hole as claimed in claim 1 is characterized in that, said electric furnace tapping hole also comprises the extension slag blanket that is arranged on the permanent magnesia brick layer.
5. electric furnace tapping hole as claimed in claim 4 is characterized in that, said extension slag blanket comprises 80%～90% TiO by mass percentage
2, 1%～5% MgO, 2%～5% SiO
2, 1%～4% MnO, 1%～3% CaO and 1%～3% Al
2O
3
6. electric furnace tapping hole as claimed in claim 1 is characterized in that, said electric furnace tapping hole also comprises the iron notch that is arranged on iron mouth frame below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376550XA CN102401569A (en) | 2011-11-23 | 2011-11-23 | Tap hole of electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376550XA CN102401569A (en) | 2011-11-23 | 2011-11-23 | Tap hole of electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102401569A true CN102401569A (en) | 2012-04-04 |
Family
ID=45884022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110376550XA Pending CN102401569A (en) | 2011-11-23 | 2011-11-23 | Tap hole of electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102401569A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654821A (en) * | 2015-03-13 | 2015-05-27 | 苏州圣谱拉新材料科技有限公司 | Side slag-removing type smelting furnace |
Citations (7)
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|---|---|---|---|---|
| CN101349503A (en) * | 2008-08-28 | 2009-01-21 | 攀钢集团钛业有限责任公司 | Electric furnace for smelting titanium slag |
| CN201233179Y (en) * | 2008-06-27 | 2009-05-06 | 攀钢集团钛业有限责任公司 | Titan slag hole for electric furnace |
| CN201301230Y (en) * | 2008-11-25 | 2009-09-02 | 罗新民 | Calcium carbide furnace liquid outlet port |
| EP2189545A1 (en) * | 2007-09-10 | 2010-05-26 | Nippon Steel Corporation | Tap hole structure of melting furnace and method of repairing same |
| CN101839640A (en) * | 2010-03-15 | 2010-09-22 | 中国恩菲工程技术有限公司 | Self-heating smelting furnace |
| CN201793610U (en) * | 2010-06-22 | 2011-04-13 | 四川龙蟒矿冶有限责任公司 | Novel tapping hole device of electric furnace |
| CN201852465U (en) * | 2010-11-09 | 2011-06-01 | 北京科技大学 | Structure of iron notch of water-cooled ore heating furnace |
-
2011
- 2011-11-23 CN CN201110376550XA patent/CN102401569A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2189545A1 (en) * | 2007-09-10 | 2010-05-26 | Nippon Steel Corporation | Tap hole structure of melting furnace and method of repairing same |
| CN201233179Y (en) * | 2008-06-27 | 2009-05-06 | 攀钢集团钛业有限责任公司 | Titan slag hole for electric furnace |
| CN101349503A (en) * | 2008-08-28 | 2009-01-21 | 攀钢集团钛业有限责任公司 | Electric furnace for smelting titanium slag |
| CN201301230Y (en) * | 2008-11-25 | 2009-09-02 | 罗新民 | Calcium carbide furnace liquid outlet port |
| CN101839640A (en) * | 2010-03-15 | 2010-09-22 | 中国恩菲工程技术有限公司 | Self-heating smelting furnace |
| CN201793610U (en) * | 2010-06-22 | 2011-04-13 | 四川龙蟒矿冶有限责任公司 | Novel tapping hole device of electric furnace |
| CN201852465U (en) * | 2010-11-09 | 2011-06-01 | 北京科技大学 | Structure of iron notch of water-cooled ore heating furnace |
Non-Patent Citations (2)
| Title |
|---|
| 《钛铁矿熔炼钛渣与生铁技术》 20060430 杨绍利 《钛铁矿熔炼钛渣与生铁技术》 574 5 , * |
| 杨绍利: "《钛铁矿熔炼钛渣与生铁技术》", 30 April 2006 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654821A (en) * | 2015-03-13 | 2015-05-27 | 苏州圣谱拉新材料科技有限公司 | Side slag-removing type smelting furnace |
| CN104654821B (en) * | 2015-03-13 | 2016-08-17 | 苏州圣谱拉新材料科技有限公司 | A kind of side removes slag formula smelting furnace |
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Application publication date: 20120404 |