Apparatus For Reheating Sub-material Utilized Electric Furnace

专利摘要:
PURPOSE: An apparatus for preheating subsidiary raw material to be injected into an electric furnace is provided to prevent heat loss, explosion and abrasion of refractories by preheating the material and removing moisture thereof using waste gas heat generated in the furnace before injecting the subsidiary raw material into the furnace. CONSTITUTION: The apparatus for preheating subsidiary raw material to be injected into an electric furnace comprises a storage part(20) which is positioned at the upper part of the cover of the electric furnace so that subsidiary raw material is stored into the storage part, wherein the storage part comprises an injection hopper(24) which is consisted of an inner plate(24a) and an outer plate(24b) so that waste gas passes through between the two plates and into a preheating line(28) arranged in the central part of the injection hopper, and an injection pipe part(26) comprising an injection pipe(34) which is connected to the lower part of the injection hopper so that subsidiary raw material and the waste gas pass through the injection pipe(34); and a gate part(40) comprising an injection adjusting opening and closing plate(42) which is installed on the injection pipe part for cutting off or passing injection of the subsidiary raw material, an exhaust adjusting opening and closing plate(44) which is elastically supported to a waste gas exhaust port(32) connected to the preheating line to adjust exhaust of the waste gas, and a cylinder(48) which is connected to any one opening and closing plate in the injection adjusting opening and closing plate(42) and the exhaust adjusting opening and closing plate(44) and connected to the remaining opening and closing plate by a wire rope.
公开号:KR20020090804A
申请号:KR1020010029829
申请日:2001-05-29
公开日:2002-12-05
发明作者:위흥덕
申请人:주식회사 포스코；
IPC主号:

专利说明:

Apparatus For Reheating Sub-material Utilized Electric Furnace}
[17] The present invention relates to an electric furnace used in the steelmaking process, and more particularly, to a secondary raw material preheating device for the electric furnace input for bypassing the exhaust gas generated in the electric furnace to preheat the secondary material input to the electric furnace.
[18] In general, the electric furnace works are charged with scrap material in the furnace, and the scrap metal is melted with an electrode to which current is applied. At this time, secondary raw materials (Fe-Si, Ch-cr, CaCO ₃ , CaO, MO-oxide) are introduced into the electric furnace in order to deoxidize, desulfurize, and deflow while melting the scrap iron.
[19] FIG. 8 schematically shows a conventional sub raw material input device for inputting sub raw materials into an electric furnace.
[20] Scrap metal introduced into the electric furnace (2) is dissolved by the heat generated in the electrode bar (4) is changed into molten steel.
[21] Subsidiary materials are filled in the feeder 6 and then introduced into the hopper 8 at the time when molten steel is formed, and from the hopper 8 to the inside of the electric furnace 2 via the feed pipe 10 again. Is committed.
[22] However, when the feedstock is filled in the feeder, it is exposed to the atmosphere, so it contains moisture in the atmosphere or is stored wet. Also, in winter, it is kept in contact with cold external air and then introduced into the furnace. It serves to cool.
[23] Therefore, there is a problem that heat loss occurs when the secondary raw material is directly injected into the electric furnace.
[24] In addition, when hot molten steel and moisture-containing subsidiary materials are mixed, an explosion phenomenon occurs due to moisture or moisture, and boiling of the molten steel causes premature wear of the lead constituting the furnace body.
[25] Therefore, when directly injected into the interior of the furnace without removing the moisture of the secondary raw materials there is a problem that the explosion or refractory wear early.
[26] The object of the present invention devised to solve the problems of the prior art is to preheat the waste gas heat generated when the scrap metal is melted in the furnace before the secondary material is introduced into the furnace, and at the same time to remove moisture by removing the moisture The present invention provides an auxiliary raw material preheating device for charging an electric furnace to prevent loss, explosion and refractory wear.
[1] 1 is a cross-sectional view showing the overall structure of the preheating device of the secondary raw material for the electric furnace input according to the present invention.
[2] Figure 2 is a front view showing a partially cut storage portion according to the present invention.
[3] 3 is a cross-sectional view seen from A-A of FIG. 2.
[4] 4 is a cross-sectional view seen from B-B of FIG. 2.
[5] Figure 5 is a perspective view showing a suction increase in accordance with the present invention.
[6] 6 and 7 is a schematic diagram showing the operation of the input tube unit according to the present invention.
[7] 8 is a perspective view schematically showing a conventional subsidiary material input device.
[8] << Explanation of symbols for main part of drawing >>
[9] 20 Storage 24 Filling hopper
[10] 26 Input tube 28 Preheating line
[11] 30 Preheater 32 Waste gas outlet
[12] 34.Input tube 36.Sealing tube
[13] 40.Gate part 42.Input control switchboard
[14] 44 ... Emission control opening 46 ... Link assembly
[15] 48 ... cylinder 50,52 ... wire rope
[16] 70 ... suction increase
[27] In order to achieve the above object, the sub-raw material preheating apparatus of the present invention is located in the upper part of the lid of the electric furnace to store the sub-raw materials, the inner plate and the outer plate made of waste gas is passed through the preheating line arranged between the two plates and the center A storage unit comprising a hopper and an inlet pipe part connected to a lower part of the inlet hopper and having an inlet pipe to allow sub-materials to pass therethrough and to allow the waste gas to pass therethrough; And an input control opening and closing plate installed in an input pipe part to block or pass the input of secondary raw materials, an emission control opening and closing plate installed to be elastically supported at a waste gas outlet connected to the preheating line to control discharge of waste gas, and an input control opening and closing plate; It is characterized in that it comprises a gate portion made of a cylinder connected to any one of the discharge control opening and closing plate and connected to the other opening and closing plate by a wire rope.
[28] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a cross-sectional view showing the overall structure of the preheating device of the secondary raw material for the electric furnace input according to the present invention, Figure 2 is a front view showing a partial cutaway the storage unit according to the present invention, Figure 3 is seen from AA of FIG. 4 is a cross-sectional view seen from BB of FIG. 2, and FIG. 5 is a perspective view showing a suction increasing unit according to the present invention.
[29] The preheating apparatus of the present invention, the storage unit 20 for storing the secondary raw material, the gate portion 40 for adjusting the opening and closing plate so that the secondary raw material stored in the storage unit 20 into the electric furnace 18, and the secondary raw material It consists of a suction increasing part 70 which improves the suction of waste gas for preheating.
[30] The storage unit 20 is composed of an inlet hopper 24, which is located at the top of the lid 22, and a preheating line through which waste gas passes, and an inlet tube unit 26 connected to a lower portion of the inlet hopper 24.
[31] The input hopper 26 has a double structure of an outer plate 24b and an inner plate 24a, and an outer passage 26 through which waste gas passes between the outer plate 24b and the inner plate 24a is formed. At the center of the plate 26 is a preheating line 28 in communication with the space between the outer plate 24b and the inner plate 24a.
[32] In the preheating line 28, a plurality of preheating tubes 30 are collected in a bundle to communicate with the waste gas outlet 32 at the upper portion.
[33] And the lower part of the input hopper 24 is in communication with the input pipe part 26, the input pipe part 26 is an input pipe 34 formed of a double pipe communicating with the lower part of the input hopper 24, and the input pipe 34 It consists of a sealing tube 36 is installed at the end of the.
[34] As shown in FIG. 3, the inlet pipe 34 has a through-path 34a communicating with the inner space 26 of the inlet hopper 24 at a central portion thereof to allow sub-materials to pass through, and a through space formed between the double pipes ( 34b) communicates with the outer passage 26 of the input hopper 24 so that the waste gas of the electric furnace 18 passes.
[35] The sealing tube 36 is inserted into the outside of the inlet tube 34 and is approached or retracted by the link assembly and cylinder described later to the preheating opening 22a of the electric furnace 18.
[36] Sub-materials stored in the input hopper 24 of the storage unit 20 is introduced into the electric furnace 18 by the operation of the gate portion or is preheated.
[37] The gate portion 40 is an input control opening and closing plate 42 installed in the input pipe section 26 for blocking or passing the input of the subsidiary material, and the discharge control opening and closing plate 44 provided in the waste gas discharge port 32 to control the discharge of the waste gas. ), A link assembly 46 installed in the input pipe 34, a cylinder 48 connected to the input control opening and closing plate 42, the discharge control opening and closing plate 44, and the link assembly 46.
[38] The input control opening and closing plate 42 is installed to open and close only the passage 34a of the input pipe 34, and is moved reciprocally between one side and the other side by the cylinder 48.
[39] One end of the first wire rope 50 is fixed to one side of the input control opening and closing plate 42, and the other end of the first wire rope 50 is fixed to the discharge control opening and closing plate 44.
[40] More preferably, as shown in FIG. 4, the upper cross beam 44a is fixed to the upper end of the discharge control opening and closing plate 44, and the vertical beam 44b having springs inserted at both ends of the upper cross beam 44a. ), The vertical beam 44b penetrates through the support 20a of the storage unit 20 and is connected to the lower cross beam 44c. The other end of the first wire rope 50 described above is connected to the lower cross beam 44c.
[41] Meanwhile, one end of the second wire rope 52 is also connected to one side of the cylinder 48, and the other end of the second wire rope 52 is connected to the link assembly 46.
[42] The link assembly 46 is connected to a plurality of fixing pieces 54 fixed to the upper portion of the input pipe 34, the connecting rod 56 fixed horizontally to the fixing piece 54, as shown in FIG. The vertical rod 58 is elastically returned by a spring inserted into the connecting rod 56 while the upper end is hinged to the rod 56, and one end is hinged to the upper end of the vertical rod 58 and the other end is a sealing tube ( It consists of a two-rod working rod 60 hinged to 36 and a cross rod 62 connecting the top of the vertical rod 58.
[43] Here, the other end of the second wire rope 52 is fixed to the cross rod 62.
[44] The waste gas sucked by the operation of the storage unit 20 and the gate unit 40 described above is preheated and then introduced into the dust collecting pipe 18a of the electric furnace 18 through the suction increasing unit 70 to be heated. It is joined to the main waste gas stream generated in 18).
[45] As shown in FIG. 5, the suction augmentation unit 70 is installed at the waste gas outlet 32 and detects movement of the suction fan 74 and the discharge control opening and closing plate 44 which are rotated by the motor 72. And a sensor switch 76 for controlling the on and off of 72.
[46] The suction augmentation unit 70 detects this when the discharge control opening and closing plate 44 blocking the waste gas outlet 32 is opened, and sends a signal to the motor 72 by the motor 72. The suction fan 74 rotates to speed up the suction of the waste gas.
[47] The secondary raw material preheater according to the present invention configured as described above has the following effects.
[48] First, the sub-material filled in the feeder 16 is introduced into the input hopper 24 in a state in which the input control opening and closing plate 42 connected to the cylinder 48 is closed.
[49] At this time, the end of the input pipe 34 is in close contact with the preheating port 22a of the electric furnace 18 and the discharge control opening and closing plate 44 of the waste gas outlet 32 is always open. Therefore, the waste gas is sucked through the preheating tube 30 and the inside of the input hopper 24 by the suction pressure sucked into the dust collecting tube 18a.
[50] That is, the waste gas discharged from the preheating port 22a passes through the through space 34b of the input pipe 34 and passes through the outer passage 26 and the plurality of preheating tubes 30 of the input hopper 24. 30 and the input hopper 24 is preheated to enter the waste gas outlet 32.
[51] Subsidiary materials introduced into the input hopper 24 are dried and preheated by the indirect radiant heat generated by the plurality of preheated tubes 30 and the input hopper 24.
[52] Subsequently, the cylinder 48 is operated to introduce the dried and preheated sub-raw material into the electric furnace 18 to move the input control opening and closing plate 42 from one side to the other side, and the passage 34a of the feeding tube 34 is formed. Is opened, and the sub-material filled in the input hopper 24 is introduced into the electric furnace 18.
[53] At this time, while the cylinder 48 is operated, the sealing tube 36 and the discharge control opening and closing plate 44 are also operated at the same time. First, the operation of the sealing tube 36 will be described.
[54] As shown in FIG. 6, when the cylinder 48 is operated to move the input control opening and closing plate 42 from one side to the other side, the second wire rope 52 is pulled and the cross rod 62 is pulled together.
[55] Accordingly, the vertical rod 58 is rotated about the connecting rod 56, the operation rod 60 connected to the top of the vertical rod 58 is also moved to the rear, and the sealing tube connected to the operation rod 60 36 also moves backward.
[56] At this time, the sub-raw material already preheated in the input hopper 24 is introduced into the electric furnace 18 through the through passage 34a of the input pipe 34.
[57] As shown in FIG. 7, when the cylinder 48 is operated to move the input control opening and closing plate 42 from one side to the other side, the second rod rope (as the vertical rod is returned to its original state by the elastic force of the spring). 52) and actuation rod 60 also try to return to their original state.
[58] Then, the sealing tube 36 is inserted to the outside of the preheating port 22a to block the outflow of the waste gas so that the waste gas more reliably flows into the through space 34b of the input pipe 34.
[59] The operation of the discharge control opening and closing plate 44 operating at the same time will be described.
[60] When the input control opening and closing plate 42 is moved from one side to the other side by the operation of the cylinder, the first wire rope 50 is pulled and the discharge control opening and closing plate 44 is moved downward.
[61] Then, as the spring is compressed based on the support 44c, the emission control opening and closing plate 44 blocks the waste gas outlet 32.
[62] Accordingly, the off signal generated by the sensor switch 76 is transmitted to the motor 72 to stop the operation of the motor 72, and the rotation of the suction fan 74 is also stopped.
[63] The above state is a process of injecting the subsidiary materials into the electric furnace 18 from the input hopper 24.
[64] And when the cylinder 48 is operated to the original position, first the input control opening and closing plate 42 is moved from one side to the other side, the first and second wire ropes 50, 52, which were pulled, are also returned to the original position.
[65] Then, with the return of the sealing tube, the spring inserted into the vertical beam is also returned, and the discharge control opening and closing plate 44 is moved upward and sensed by the sensor switch 76.
[66] Then, the on signal generated from the sensor switch 76 is sent to the motor 72, the motor 72 rotates the suction fan 74 to further increase the suction pressure of the waste gas.
[67] Then, the intake of the waste gas sucked through the inlet tube 34 is better, so that the preheating of the preheating tube 30 and the inlet hopper 24 proceeds rapidly, thereby increasing the thermal efficiency.
[68] As a result, the sub-material introduced from the feeder 16 to the input hopper 24 is dried and preheated faster.
[69] As described above, according to the present invention, when the subsidiary materials are added to the electric furnace, the subsidiary materials are added to the input hopper to remove moisture and moisture contained in the subsidiary materials, and the preheating is performed. In addition to the effect of recycling the energy of the molten steel due to the preheated secondary raw material is prevented.
[70] And it prevents the explosion phenomenon in the molten steel due to the moisture contained in the subsidiary materials, and also prevents the molten steel boiling to protect the lead that constitutes the furnace furnace.

权利要求:
Claims (3)
[1" claim-type="Currently amended] Subsidiary materials are stored in the upper part of the lid of the furnace, consisting of an inner plate and an outer plate, an input hopper through which waste gas passes through a preheating line arranged between the two plates and in the center, and connected to a lower portion of the input hopper to pass the sub raw materials. A storage unit comprising an input pipe part including an input pipe to allow the waste gas to pass therethrough; And
An input control opening and closing plate installed in an input pipe section for blocking or passing the input of the secondary raw material; Gate part consisting of a cylinder which is connected to any one of the discharge control panel and connected to the other panel by a wire rope
Preheating device of the secondary raw material for the electric furnace comprising a.
[2" claim-type="Currently amended] The method of claim 1,
A plurality of fixing pieces fixed to the upper portion of the input pipe, a connecting rod fixed horizontally to the fixing piece, a vertical rod elastically returned by a spring inserted into the connecting rod while hinged to the connecting rod, and one end of which is vertical It consists of a working rod hinged to the bottom of the rod and the other end is hinged to the sealing tube, and a cross rod connecting the upper end of the vertical rod to install a link assembly on the outside of the inlet pipe, the end of the inlet pipe The preheating apparatus of the sub raw material for the electric furnace input, characterized in that for connecting the sealing tube inserted into the preheating sphere of the cross-rod using a wire rope.
[3" claim-type="Currently amended] The method of claim 2,
The auxiliary raw material for electric furnace input further comprising a suction fan which is installed in the waste gas discharge port and rotated by a motor, and a sensor switch for detecting the movement of the discharge control opening and closing plate to control the on and off of the motor. Preheating device.

类似技术:

---

公开号 | 公开日 | 专利标题

---

CA2438132C|2008-06-17|Coke oven flue gas sharing

---

US6438154B2|2002-08-20|Method and apparatus for recovering metal values from liquid slag an baghouse dust of an electric arc furnace

---

EP1994121B1|2018-09-05|Improved method and apparatus for producing coke

---

US7513929B2|2009-04-07|Operation of iron oxide recovery furnace for energy savings, volatile metal removal and slag control

---

AU2002300990B9|2008-09-11|Method and device for producing molten iron

---

CA1235905A|1988-05-03|Method for continuous steelmaking

---

EP2044377B1|2014-11-05|Sealing apparatus for a slag door of a metallurgical furnace

---

ES2574923T3|2016-06-23|Apparatus for combustion of gas coming out of an oven, to preheat the scrap that enters the oven itself and related procedure

---

CN102472579B|2014-08-27|Slag discharge door apparatus for an electric furnace

---

RU2096706C1|1997-11-20|Electric arc furnace for steel production, steel production from scrap, and/or from sponge iron, and/or from blast-furnace cast iron in electric arc furnace, and method for steel production from scrap in electric arc furnace

---

CA2399749C|2008-07-08|Door assembly for rotary furnace

---

US6696013B2|2004-02-24|Metallurgical furnace with scrap metal preheater and dispenser

---

KR101022447B1|2011-03-15|An apparatus for manufacturing molten irons by hot compacting fine direct reduced irons and calcinated additives and method using the same

---

EP1409754A1|2004-04-21|Method for direct metal making by microwave energy

---

FR2520754A1|1983-08-05|Process and apparatus for the production of reactor iron

---

US20010028136A1|2001-10-11|Two-chamber furnace for the melt- contact smelting of contaminated aluminum scrap

---

BG60921B2|1996-06-28|Method and device for continuous steel casting

---

CA2739955A1|2010-04-15|Air distributing device for primary air in coke ovens

---

US7374716B2|2008-05-20|Metallurgical oven and a material basket for a metallurgical oven

---

US5218617A|1993-06-08|Apparatus for feeding iron-bearing materials to metallurgical furnaces

---

EP1687577A1|2006-08-09|Charging device, especially charging stock preheater

---

CN105202907B|2017-09-29|Scrap steel preheating type electric arc furnaces and the method for improving side wall charging electric arc stove heat cold-zone

---

KR20120074927A|2012-07-06|Apparatus for manufacturing magnesium

---

CN202195692U|2012-04-18|Oxygen-enrichment side-blowing continuous fuming furnace

---

CN1041557C|1999-01-06|Smelting plant with two melting furnaces arranged in juxtaposed relationship

同族专利:

---

公开号 | 公开日

---

KR100561062B1|2006-03-17|

引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

法律状态:
2001-05-29|Application filed by 주식회사 포스코

---

2001-05-29|Priority to KR1020010029829A

---

2002-12-05|Publication of KR20020090804A

---

2006-03-17|Application granted

---

2006-03-17|Publication of KR100561062B1

优先权:

---

申请号 | 申请日 | 专利标题

---

KR1020010029829A|KR100561062B1|2001-05-29|2001-05-29|Apparatus For Reheating Sub-material Utilized Electric Furnace|