CN101349503B - Electric stove for smelting titanium slag - Google Patents
Electric stove for smelting titanium slag Download PDFInfo
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- CN101349503B CN101349503B CN2008102144948A CN200810214494A CN101349503B CN 101349503 B CN101349503 B CN 101349503B CN 2008102144948 A CN2008102144948 A CN 2008102144948A CN 200810214494 A CN200810214494 A CN 200810214494A CN 101349503 B CN101349503 B CN 101349503B
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Abstract
The invention provides an electric furnace for melting titanium slag, which comprises a furnace lid, a furnace mantle, a furnace lining, a feed opening, electrodes, a slag hole, a slag notch and a taphole, and is characterized in that the diameter of the pole circle of the electric furnace is 2500mm-3500mm, the operation power of the electric furnace is 15000kVA-30000kVA, the hearth height of the electric furnace is 5000mm-9000mm, and the diameter of a molten pool of the electric furnace is 8000mm-12000mm. According to the embodiment of the invention, the electric furnace for melting titanium slag has stable furnace condition and high heat efficiency when smelting titanium slag.
Description
Technical field
The present invention relates to a kind of titanium slag smelting equipment, specifically, relate to a kind of large-scale electric furnace that is used for smelting titanium slag.
Background technology
The main raw material of titanium industry is ilmenite and rich titanium material, and rich titanium material package is drawn together titanium slag, artificial rutile and natural rutile.Ilmenite is exactly to remove impurity elements such as iron, calcium and magnesium to greatest extent as the raw material of producing titanium slag, makes the titanium enrichment.Titanium slag is to be a kind of higher titanium material of titanium dioxide that contains that raw material is smelted with the ilmenite concentrate, occupies an leading position in the rich titanium material in the world.
Electric furnace smelting process is adopted in titanium slag production.Shape according to electric furnace is divided, and the electric furnace that smelting titanium slag adopted has round kiln and rectangle stove; Divide according to the electric furnace air-tight manner, the electric furnace that smelting titanium slag adopted can be divided into closed electric furnace, semi closed electric furnace and uncovered electric furnace.Yet there are the severe contamination of dust, waste gas and noise in semi closed electric furnace and uncovered electric furnace.
At closed electric furnace, the research of technique of three phases has been experienced in the titanium slag technological development of China, and the test of outbalance has:
(1) pre-oxidation process test: experimental study is born by the total institute of the coloured research in Beijing, jinzhou Ferroalloy Plant, Shenyang magnalium designing institute and Beijing Iron and Steel Research Geueral Inst.Operational path is: ilmenite concentrate → rotary kiln oxidizing roasting → closed electric furnace smelting → titanium slag and half steel.Testing furnace is the 187kVA closed electric furnace.
(2) prereduction technological test: bear by Flos Bombacis Malabarici iron and steel research institute and Kweiyang magnalium designing institute.Operational path is: ilmenite concentrate → ore grinding → make ball → rotary kiln reduction → magnetic separation → electrosmelting → titanium slag and half steel.Testing furnace is the 250kVA closed electric furnace.
(3) fine ore is planted directly into furnaceman: born by Flos Bombacis Malabarici iron and steel research institute and Kweiyang magnalium designing institute.Operational path is: ilmenite concentrate → closed electric furnace smelting → titanium slag and half steel.Testing furnace is the 250kVA closed electric furnace.
From above test as can be seen, all on the small power testing furnace, carry out about the closed electric furnace smelting titanium slag.
The CN1975305A application for a patent for invention discloses the closed electric furnace that a kind of smelting titanium slag is used, and the operand power of this closed electric furnace is 3200～8400kVA, and the electrode circle diameter of electric furnace is 1500～2350mm, and each feed-pipe is independently controlled.
Yet, in the titanium slag smelting process, have that furnace charge chemically reactive height, conductivity variations are big, viscosity with temperature and many disadvantageous aspects such as the smelting progress changes greatly, stove ore deposit instability.At present, yet there are no report about the large-scale titanium slag electric furnace of power more than 15000kVA.
Summary of the invention
The object of the present invention is to provide a kind of large-scale electric furnace that can realize the smelting titanium slag that the smelting titanium slag with electric stove working of a furnace is stable, thermo-efficiency is high.
To achieve these goals, the invention provides a kind of electric furnace that is used for smelting titanium slag, described electric furnace comprises bell, furnace shell, furnace lining, charge cavity, electrode, slag notch, ash shoot and iron notch, the electrode circle diameter that it is characterized in that described electric furnace is 2500mm～3500mm, the operand power of described electric furnace is 15000kVA～30000kVA, the furnace height of described electric furnace is 5000mm～9000mm, position, the molten bath diameter of described electric furnace is 8000mm～12000mm, and described bell is by 6～10 edge bells and 2～4 built-up type bells that anti-magnetic center bell is formed.
In electric furnace according to the present invention, described anti-magnetic center bell is that the steel plate of 12Cr18Ni10Ti is made by material.Preferably, described built-up type bell is made up of 9 edge bells and 3 anti-magnetic center bells.
Described edge bell and anti-magnetic center bell are suspended on the cantilever that is fixed in the furnace shell upper end by suspension ring.Fill with refractory brick in gap between in described edge bell and the described anti-magnetic center bell each.In addition, on described edge bell, the edge charge cavity is set, on described anti-magnetic center bell, edge charge cavity and centre charging hole is set.The quantity in described edge charge cavity and centre charging hole is 4～20, and each charge cavity is provided with independent measuring apparatus.Preferably, described edge charge cavity is 18, and described centre charging hole is 1.
In addition, also be provided with electrode mounting hole on the described anti-magnetic center bell.Form electrode respectively in two radius sides of each anti-magnetic center bell half hole is installed, each electrode on the described anti-magnetic center bell is installed electrode on half hole and another the anti-magnetic center bell and half hole is installed is combined to form an electrode mounting hole.
In an embodiment according to the present invention, described edge bell has a plurality of explosionproof holes.The furnace shell of described electric furnace is made of top furnace shell, middle part furnace shell and bottom furnace shell, connects with the arc boiler sheet between the furnace shell of each part.The different piece of the burner hearth of described electric furnace adopts different refractory materials and different lining thicknesses.Preferably, lining thickness is 1200mm-1500mm in the molten bath.In addition, in described electric furnace bottom, also be formed with the air-cooled passage of building by laying bricks or stones with refractory brick.
Description of drawings
Fig. 1 shows the schematic cross sectional views according to the electric furnace that is used for smelting titanium slag of the embodiment of the invention;
Fig. 2 shows the schematic plan view of the structure of bell.
Embodiment
Below, describe embodiments of the invention in detail with reference to accompanying drawing.
Fig. 1 shows the schematic cross sectional views according to the electric furnace that is used for smelting titanium slag of the embodiment of the invention.Fig. 2 shows the schematic plan view of the structure of bell.
With reference to Fig. 1, mainly constitute by bell, furnace shell and furnace bottom according to the electric furnace that is used for smelting titanium slag of the embodiment of the invention.The electric furnace that is used for smelting titanium slag according to an exemplary embodiment of the present invention as shown in Figure 1 is a large-scale titanium slag electric furnace, and electrode circle diameter is 2500mm～3500mm, and the operand power of electric furnace is 15000kVA～30000kVA.
In an embodiment according to the present invention, furnace shell mainly is divided into three sections of upper, middle and lower, that is, and and top furnace shell 8, middle part furnace shell 12 and bottom furnace shell 13.Connect with the arc boiler sheet between the each several part furnace shell, in order to the thermal expansion of compensation furnace lining.Adopt this built-up type furnace shell, solved the even problem of large-scale electric furnace furnace shell non-homogeneous expansion, compensated the thermal expansion of furnace lining simultaneously.
As shown in Figure 1, this electric furnace is cylindrical electric furnace substantially, have to enclose to build up burner hearth and burner hearth bottom is a spheroid form by the furnace lining in furnace shell and the furnace bottom, and in burner hearth, be the molten bath part to metal bath surface from the furnace bottom bottom.More particularly, enclose the part that builds up by furnace lining G2 and be called the molten bath, as shown in Figure 1.The furnace height of this electric furnace (that is, the vertical range from the lower-most point bottom the spheroid in molten bath to bell) is 5000mm～9000mm, and position, molten bath diameter is 8000mm～12000mm.The increase of furnace height has improved the security of electric furnace operation.The different sites of burner hearth adopts different refractory materials and different lining thicknesses.Furnace lining comprises working lining, permanent layer and insulation material layer from inside to outside respectively.More particularly, in order to improve the work-ing life of electric furnace, the working lining G1 of the furnace lining of top furnace shell 6 inside builds by laying bricks or stones with high alumina brick; The working lining G2 in molten bath builds by laying bricks or stones with magnesia brick, and the permanent layer in molten bath is built by laying bricks or stones with clay brick.Insulation material layer uses insulating material well known in the art, omits detailed description here.In an embodiment according to the present invention, the lining thickness at position, molten bath (that is, the total thickness of working lining, permanent layer and insulation material layer) is approximately 1200mm-1500mm, and wherein, the thickness of working lining is approximately 1100mm-1200mm.Therefore, adopt said structure, can realize the longevity of furnace lining.
As depicted in figs. 1 and 2, bell 1 is the built-up type bell, and this built-up type bell is made up of 6～10 edge bells 101 and 2～4 anti-magnetic center bells 102.In this example embodiment, the centre portions of bell is made up of 3 anti-magnetic center bells 102, and (see figure 2) is formed by 9 edge bells 101 in the edge section of bell.Anti-magnetic center bell 102 is that the steel plate of 12Cr18Ni10Ti is made by material, and this material has antimagnetic and oxidation resistant effect.Therefore, adopt this built-up type bell can avoid the stronger eddy current that forms owing to electromagnetic induction and cut off eddy current to form passage the problem of the bell heating that causes thereby the solution electromagnetic eddy is responded to.
In an embodiment according to the present invention, the mounting means of built-up type bell is: cantilever 2 (see figure 1)s are fixed on the furnace shell upper end and extend from the central axis direction of furnace shell to electric furnace, each bell (comprising edge bell and center bell) is suspended on the cantilever 2 by suspension ring 3 (see figure 1)s, and fill with refractory brick in the gap between each bell.Cantilever 2 and suspension ring 3 can be made by steel.Adopt this built-up type bell, can solve the bell installation and removal problem of large-scale electric furnace.
It is pointed out that only illustrating property of Fig. 2, do not limit the scope of the invention.The diameter of bell 1 is 10000～18000mm.In the present embodiment, the knotting layer of bell is made by refractory materials, is used for the heat insulating to bell.Simultaneously, in order to reduce the temperature of bell, be provided with water cooling plant at bell.
In addition, in an embodiment according to the present invention, edge charge cavity 6, explosionproof hole 7 and secondary combustion chamber import 21 are set on edge bell 101, on anti-magnetic center bell 102, centre charging hole 4, edge charge cavity 6 and electrode mounting hole 22 are set, as shown in Figure 2.
Can design the position of each edge charge cavity on the bell according to the cloth requirement of each point in the stove.In the present embodiment, 4～20 charge cavitys (comprising centre charging hole and edge charge cavity) are set on edge bell 101 and anti-magnetic center bell 102 respectively, and in the filling tube of each charge cavity, be provided with independent measuring apparatus, be used for controlling the feeding quantity of each charge cavity.Preferably, 18 edge charge cavitys and 1 centre charging hole (as shown in Figure 2) are set, thereby realize in the stove cloth rationally, realize in the smelting process steadily, and improve and smelt efficient.
A plurality of explosionproof holes 7 evenly are set on the edge bell, above each explosionproof hole 7, are provided with port lid.When furnace pressure during greater than 600Pa, explosionproof hole is washed open automatically, thereby guarantees the safe operation of electric furnace.Explosionproof hole 7 is set guarantees the safe operation of electric furnace.In an embodiment according to the present invention, on the edge bell, be provided with 6 explosionproof holes 7, as shown in Figure 2.
In addition, on anti-magnetic center bell 102, three electrode mounting holes 22 are set, are used to install three electrodes of this electric furnace.Specifically, electric furnace according to the embodiment of the invention has three anti-magnetic center bells 102, each anti-magnetic center bell 102 is roughly fan-shaped, and on two radius sides of the anti-magnetic center bell 102 of segmental, an electrode is set respectively respectively half hole 22 is installed, that is, each anti-magnetic center bell 102 has electrode in its radius side half hole is installed.When three anti-magnetic center bells 102 fitted together, electrode was installed half hole and is combined into a complete electrode mounting hole 22 in twos, that is, 6 of three anti-magnetic center bells 102 half electrode mounting holes are combined into three complete electrode mounting holes 22.Because the electric furnace according to the embodiment of the invention adopts self baking electrode, and self baking electrode all is fixed in the process of electric furnace operation and bell dismounting, so adopt the anti-magnetic center bell of said structure can simplify the dismounting of bell, and prevent from unloading process, to damage electrode.
As shown in Figure 1, slag notch 10 and ash shoot 11 are arranged between top furnace shell 8 and the middle part furnace shell 12.On vertical height, the iron notch (not shown) is higher than slag notch.Separate smoothly in order to ensure slag iron, the difference of altitude between slag notch 10 and the iron notch (not shown) is 300mm-500mm.
The diameter of iron notch is about 50mm-80mm, and the diameter of slag notch 11 is about 150mm-200mm.Iron notch is identical with the material of molten pool working layer with the furnace lining of slag notch 11 inside, that is, build by laying bricks or stones by magnesia brick, and the part beyond the furnace lining of iron notch and slag notch 11 constitutes by the pouring layer of SiC matter, has realized the longevity of iron notch and slag notch 11 like this.
In addition, iron notch is apart from the about 500mm-600mm of furnace bottom, thus the Rational Thickness of ladle heel water layer in the assurance burner hearth, to realize the thermostability of burner hearth in the smelting process.
In the electric furnace bottom, G3 builds by laying bricks or stones with refractory brick, and builds into air-cooled passage 14 naturally by laying bricks or stones with refractory brick.In the working process of electric furnace, use the gas blower air blast, make wind cool off electric furnace, thereby the normal mobility scale of temperature that is positioned at the thermopair at furnace bottom center is about 600 ℃ to about 660 ℃ by air-cooled passage from gas blower.The temperature variations measured according to thermopair determined the open degree of furnace bottom blower fan, guaranteeing the rational solidified layer thickness of furnace bottom, thereby realizes the longevity of furnace bottom.
According to embodiments of the invention, the self baking electrode technology that this electric furnace adopts built-up type to press, thus stopped electrode from slipping and having solved economy and the safety issue that electric furnace uses electrode.As depicted in figs. 1 and 2, three electrodes of electric furnace employing, and the electrode circle diameter D (as shown in Figure 2) of three electrodes according to an embodiment of the invention are 2500mm～3500mm, and the utmost point heart of electrode circle power density is 3100kVA/m
2To 3500kVA/m
2Thereby, realized carrying out smoothly of electric furnace melt and intensification.Because these three electrodes adopt and press automatically and lifting, so reduced labor intensity of operating personnel.Above-mentioned electric furnace is realized the lifting of electrode and the automatic operation that presses by its robot control system(RCS), simultaneously to lining temperature, the furnace pressure of electric furnace, transport electric current, voltage parameter is monitored, and can guarantee carrying out smoothly of titanium slag smelting process.
In addition, because electric furnace is the equipment of at high temperature working, so in whole electric furnace, need water cooling plant be set in various piece.Yet the cooling system of electric furnace is identical with cooling system of the prior art according to an embodiment of the invention, is not described in detail at this.
Therefore, can realize that according to the electric furnace that is used for smelting titanium slag of the embodiment of the invention smelting titanium slag with electric stove working of a furnace is stable, thermo-efficiency is high, equipment maximizes and the high advantage of automatization level.
The invention is not restricted to the foregoing description, without departing from the present invention, can carry out various changes and modifications.
Claims (15)
1. electric furnace that is used for smelting titanium slag, described electric furnace comprises bell, furnace shell, furnace lining, charge cavity, electrode, slag notch, ash shoot and iron notch, the electrode circle diameter that it is characterized in that described electric furnace is 2500mm～3500mm, the operand power of described electric furnace is 15000kVA～30000kVA, the furnace height of described electric furnace is 5000mm～9000mm, position, the molten bath diameter of described electric furnace is 8000mm～12000mm, and described bell is by 6～10 edge bells and 2～4 built-up type bells that anti-magnetic center bell is formed.
2. electric furnace according to claim 1, wherein, described anti-magnetic center bell is that the steel plate of 12Cr18Ni10Ti is made by material.
3. electric furnace according to claim 1, wherein, described built-up type bell is made up of 9 edge bells and 3 anti-magnetic center bells.
4. electric furnace according to claim 1, wherein, described edge bell and anti-magnetic center bell are suspended on the cantilever that is fixed in the furnace shell upper end by suspension ring.
5. electric furnace according to claim 4, wherein, fill with refractory brick in the gap between each in described edge bell and the described anti-magnetic center bell.
6. electric furnace according to claim 1 wherein, is provided with the edge charge cavity on described edge bell, on described anti-magnetic center bell edge charge cavity and centre charging hole are set.
7. electric furnace according to claim 6, wherein, the quantity in described edge charge cavity and centre charging hole is 4～20, and each charge cavity is provided with independent measuring apparatus.
8. electric furnace according to claim 7, wherein, described edge charge cavity is 18, described centre charging hole is 1.
9. electric furnace according to claim 1 wherein, also is provided with electrode mounting hole on the described anti-magnetic center bell.
10. electric furnace according to claim 9, wherein, form electrode respectively in two radius sides of each anti-magnetic center bell half hole is installed, each electrode on the described anti-magnetic center bell is installed electrode on half hole and another the anti-magnetic center bell and half hole is installed is combined to form an electrode mounting hole.
11. electric furnace according to claim 1, wherein, described edge bell has a plurality of explosionproof holes.
12. electric furnace according to claim 1, wherein, the furnace shell of described electric furnace is made of top furnace shell, middle part furnace shell and bottom furnace shell, connects with the arc boiler sheet between the furnace shell of each part.
13. electric furnace according to claim 1, wherein, the different piece of the burner hearth of described electric furnace adopts different refractory materials and different lining thicknesses.
14. electric furnace according to claim 13, wherein, lining thickness is 1200mm-1500mm in the molten bath.
15. electric furnace according to claim 1 wherein, in described electric furnace bottom, also is formed with the air-cooled passage of building by laying bricks or stones with refractory brick.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102144948A CN101349503B (en) | 2008-08-28 | 2008-08-28 | Electric stove for smelting titanium slag |
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| CN2008102144948A CN101349503B (en) | 2008-08-28 | 2008-08-28 | Electric stove for smelting titanium slag |
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| CN101349503A CN101349503A (en) | 2009-01-21 |
| CN101349503B true CN101349503B (en) | 2010-11-17 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401569A (en) * | 2011-11-23 | 2012-04-04 | 攀钢集团钛业有限责任公司 | Tap hole of electric furnace |
| CN103305705B (en) * | 2013-06-28 | 2014-08-06 | 辽宁久星钛业有限责任公司 | Large closed high titanium slag smelting special electric furnace with raw material preheating device |
| CN103727779B (en) * | 2014-01-06 | 2015-10-28 | 攀枝花钢城集团瑞钢工业有限公司 | Electric furnace arrangement for producing steel stove gate building method |
| CN106756115B (en) * | 2016-11-21 | 2019-02-01 | 中国恩菲工程技术有限公司 | The system and method for preparing titanium slag |
| CN110926214B (en) * | 2019-12-12 | 2022-09-20 | 上海电气上重铸锻有限公司 | Electric furnace cover and material thereof |
| CN112391538A (en) * | 2020-11-18 | 2021-02-23 | 中冶赛迪工程技术股份有限公司 | Multi-electrode high-slag carbonization smelting electric furnace |
| CN113718118A (en) * | 2021-09-03 | 2021-11-30 | 攀钢集团钛业有限责任公司 | Method for improving production continuity of titanium slag electric furnace |
| CN117029505B (en) * | 2023-07-10 | 2024-03-05 | 江苏润美新材料有限公司 | Electrode automatic lifting device |
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Free format text: CORRECT: ADDRESS; FROM: 617000 NO.1, JIANSHE ROAD, PANZHIHUA CITY, SICHUAN PROVINCE TO: 617000 NO.1, JIANSHE ROAD, PANZHIHUA CITY, SICHUAN PROVINCE, CHINA |
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Effective date of registration: 20100507 Address after: 617000 No. 1, Jianshe Road, Panzhihua, Sichuan, China Applicant after: Titanium Industry Co., Ltd. of Pangang Group Co-applicant after: Panzhihua New Steel & Vanadium Co., Ltd. Address before: 617000 No. 1, Jianshe Road, Sichuan, Panzhihua Applicant before: Titanium Industry Co., Ltd. of Pangang Group |
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