EP2387620A1 - Shaft furnace charging installation - Google Patents

Shaft furnace charging installation

Info

Publication number
EP2387620A1
EP2387620A1 EP10700743A EP10700743A EP2387620A1 EP 2387620 A1 EP2387620 A1 EP 2387620A1 EP 10700743 A EP10700743 A EP 10700743A EP 10700743 A EP10700743 A EP 10700743A EP 2387620 A1 EP2387620 A1 EP 2387620A1
Authority
EP
European Patent Office
Prior art keywords
panel
fluid
charge material
discharge
heated
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.)
Granted
Application number
EP10700743A
Other languages
German (de)
French (fr)
Other versions
EP2387620B1 (en
Inventor
Guy Thillen
Jeannot Loutsch
Thorsten Philippi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP2387620A1 publication Critical patent/EP2387620A1/en
Application granted granted Critical
Publication of EP2387620B1 publication Critical patent/EP2387620B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/20—Arrangements of devices for charging

Definitions

  • the present invention generally relates to a shaft furnace charging installation, in particular to a discharge assembly arranged between a storage hopper and the shaft furnace.
  • the present invention is particularly well suited for use in a shaft furnace charging installation of the Bell Less TopTM type as disclosed in US 3,693,812.
  • the furnace is provided with at least two intermediate storage hoppers, which may be alternately opened to ambient atmosphere for loading material therefrom to the interior of the pressurized furnace via a discharge channel.
  • Such furnace charging installations employ a pair of serially arranged valves between the storage hopper and the furnace.
  • the first valve or material gate performs a material flow control or metering function, by increasing or reducing the area of the storage hopper discharge opening and thereby assists in the achievement of a desired distribution of material on the furnace hearth.
  • the second valve or sealing valve functions to establish a hermetic seal required to permit the alternate pressurizing and depressurizing of the storage hopper.
  • dust build-up due to condensation of blast furnace gas in combination with wet equalizing gas and dust particles from the charge material, may occur.
  • Such dust build-up may accumulate on a protection ring and hinder the material gate from properly closing the hopper discharge opening.
  • the limit switch which indicates that the material gate is in its closed position, may not be activated.
  • the charging sequence is thereby interrupted and is then necessary either to mechanically remove the build-up or to change the limit switch position.
  • the latter can however cause further problems such as excessive wear on the seal on the sealing valve arranged downstream. This is caused by the fact that the material gate is not correctly closed and that a larger gap allows more charge material to leak through the closed material gate.
  • the dust build-up may be such that, in the closed position of the material gate, the latter rests on the dust build-up, thereby falsifying the weighing results of the charge material fed into the hopper.
  • a steam heated panel behind the octagonal chute of the hopper.
  • a heated panel By heating such a heated panel to a temperature of about 120 0 C, condensation can be avoided, which means that dust-build-up and its consequences can also be avoided.
  • Such a heated panel consists of a stainless steel casing formed into a shape matching the shape of the octagonal chute.
  • Stainless steel pipes are arranged inside the steel casing and embedded in a heat conductive concrete. It has been found that the conditions of the blast furnace gas are such that the stainless steel casing and/or the stainless steel pipes quickly corrode and that the heated panel is thereby quickly destroyed and steam is allowed to escape from the stainless steel pipes into the blast furnace or hopper environment.
  • the object of the present invention is to provide an improved blast furnace charging system, wherein the above drawbacks are avoided. This object is achieved by a system as claimed in claim 1.
  • the present invention proposes a blast furnace charging system for feeding charge material into the hearth of a blast furnace, the system comprising at least two hoppers for temporarily storing charge material, each hopper comprising a discharge assembly for feeding the charge material from the respective hopper into the hearth of a blast furnace.
  • the discharge assembly comprises an inclined discharge channel having, at its lower end, a material gate providing charge material flow control at the lower end of the discharge channel; and a protection ring arranged in the vicinity of the material gate for leading charge material from the discharge channel to a seal seat of the discharge assembly.
  • the discharge assembly further comprises a heated panel arranged on the protection ring, the heated panel being formed by a panel-like copper body having fluid channels arranged therein so as to form a channel leading from a fluid inlet to a fluid outlet.
  • heated panels made of a panel-like copper body have good corrosion resistance against blast furnace gas, in particular against chlorides in the blast furnace gas.
  • the heated panels according to the present invention therefore have longer lifetime and the risk of steam escaping from the fluid channels is reduced. This leads to a reduced number of maintenance interventions and hence fewer furnace stoppages.
  • the copper heated panels also provide good heat transfer, enabling the heated plate to be heated to a higher temperature, when compared to the conventional stainless steel heated panels.
  • the fluid channels in the panel-like copper body may be formed by casting.
  • the fluid channels in the panel-like copper body may be formed by drilling. Plugs may be arranged in the end portions of the drilled fluid channels.
  • the heated panel has a shape corresponding to the shape of the discharge channel, wherein the panel-like copper body is formed into the shaped heated panel after formation of the fluid channels therein.
  • the heated panel preferably comprises a connection element for connecting the heated panel to the protection ring.
  • a wear resistant copper alloy may further be arranged on a lower portion of a front face of the heated panel and on a front face of the connection element.
  • the fluid channels comprise a fluid inlet and a fluid outlet, the fluid inlet and outlet being connected to a fluid circuit for delivering a hot fluid, e.g. steam, to the heated panel.
  • Fig.1 is a side view of a bell-less top charging system on a blast furnace
  • Fig.2 is an enlarged side view of a portion of a discharge assembly of the system of Fig.1 ;
  • Fig.3 is a cross-sectional view through a heated panel of the discharge assembly of Fig.2.
  • a Bell Less TopTM charging system 12 of the parallel hopper type uses, in a manner known per se, an angularly adjustable rotary chute 14 for distribution of charge material into the hearth of the blast furnace 10.
  • Two storage or top hoppers 16, 16' provide temporary storage of the charge material to be distributed by the chute 14.
  • a conveyor belt mechanism 18 provides feeding of the top hoppers 16, 16' through a feeding assembly 20 arranged above and connected to hoppers 16, 16'.
  • the feeding assembly 20 comprises a collecting cone 22 and a deviation chute 24 for selectively feeding and guiding charge material into either hopper 16 or 16'.
  • Hoppers 16, 16' are constructed as pressure hoppers to insure that the blast furnace 10 remains sealed from the atmosphere during the charging process. Therefore, hoppers 16, 16' having an air lock function are each provided with upper and lower sealing valves (not shown).
  • a discharge assembly or valve block, globally identified by reference 30 communicates with the lower open ends of the hoppers 16, 16'.
  • Discharge cones 32, 32' at the respective lower open ends of the hoppers 16, 16' are connected by bellows 34, 34' to discharge channels 36, 36'.
  • Throttle valves or material gates 38, 38' provide charge material flow control at the lower ends of the discharge channels 36, 36'. Accordingly, the material gates 38, 38' enable controlled discharge of charge material from the hopper 16 or 16' to the rotary chute 14.
  • the material gates 38, 38' are set by hydraulic drives 40, 40'.
  • charge material passes from the hoppers 16, 16' over the discharge channels 36, 36' to a central feeding spout 42, which directs the charge material vertically onto the rotary chute 14.
  • Fig.2 shows in more detail a portion of the discharge assembly 30, showing a discharge channel 36 connected to a discharge cone 32 of a hopper 16.
  • a material gate 38 is pivotably arranged so as to pivot between two positions. In a closed position, as shown in Fig.2, charge material is retained in the discharge channel 36. In an open position, as shown in dotted lined in Fig.2, charge material is allowed to flow out of the discharge channel 36 towards the rotary chute 14. The rate of flow of charge material out of the discharge channel 36 can be regulated by setting the material gate 38 in various intermediate positions.
  • a protective casing 44 is arranged around the discharge assembly 30 and has a seal seat 46 for feeding charge material to the rotary chute 14.
  • a sealing valve 48 is associated with the seal seat 46 for sealing the furnace hearth from the hopper 16, thereby allowing the filling of the hopper 16 with charge material without gas pressure drop in the furnace itself.
  • the charging system 12 comprises a protection ring 50 generally arranged so as to protect the seal seat 46, in particular when the material gate 38 is almost in its closed position.
  • the protection ring 50 is provided with a heated panel 52 designed and arranged so as to heat at least a portion of the protection ring 50 in proximity to a gate nose 54 of the material gate 38 when the latter is in its closed position. Due to the heated panel 52, the formation of condensation on the protection ring 50 can be avoided. It should be noted that charging material dust is present in the vicinity of the material gate 38. Dust build up, which may otherwise occur due to the condensation of blast furnace gas in combination with wet equalizing gas and dust particles from the charge material, can be avoided.
  • the heated panel 52 has an upper edge 56 and a lower edge 58.
  • an so-called air canon 60 is arranged for blowing air at very high speed, generally supersonic speed, onto a front surface 62 of the heated panel 52. This air helps to keep condensation and dust particles away from the front surface 62 of the heated panel 52, thereby avoiding accumulation of dust on the protection ring 50.
  • the protection ring 50 By keeping the protection ring 50 essentially free from dust build-up, the correct functioning on the material gate 38 can be ensured at least in the sense that the correct closure of the material gate 38 cannot be prevented by such a dust build-up.
  • the weighing of the charge material in the hopper 16 is adversely influenced if the material gate 38 rests on a dust build-up when in its closed position.
  • the weighing precision of weighing beams or load cells 64 one of which is shown in Fig.2, is maintained.
  • the heated panel 52 itself will now be more closely described by referring to Fig.3.
  • the heated panel 52 is formed by a panel-like copper body 66 having a front face 62 and an opposite rear face 68, an upper edge 56 and a lower edge 58 and two side edges.
  • fluid channels 70 are arranged so as to form a channel leading from a fluid inlet 72 to a fluid outlet 74.
  • the fluid inlet and outlet 72, 74 are connected to a fluid circuit (not shown) feeding a hot fluid, generally steam, through the panel-like copper body 66.
  • the fluid channels 70 may be formed in the panel-like copper body 66 by casting or drilling. Indeed, the panel-like copper body 66 may be formed by casting the copper around a filler material, which can be removed later to reveal the fluid channels 70. Alternatively, the fluid channels 70 may be drilled into the panel-like copper body 66. Interconnecting fluid channels may also be drilled. Channel portions near the upper, lower or side edges of the panel-like copper body 66 may be plugged after drilling. Such channel portions are necessary to form the fluid channels 70 by drilling but need be plugged to form a continuous channel leading from the fluid inlet 72 to the fluid outlet 74.
  • the latter After formation of the fluid channels 70 in the panel-like copper body 66, the latter is further bent to a shape corresponding to the shape of the distribution channel 36 and material gate 38.
  • the heated panel 52 comprises an L-shaped connection element 76 for allowing the heated panel 52 to be connected to the protection ring 50.
  • a wear resistant copper alloy may be hard faced onto a lower portion of the front face 62 of the panel-like copper body 66 and onto the connection element 76 for increasing wear resistance on the connection element 76.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

A blast furnace charging system (12) for feeding charge material into the hearth of a blast furnace (10) comprises at least two hoppers (16, 16') for temporarily storing charge material, each hopper (16, 16') comprising a discharge assembly (30, 30') for feeding the charge material from the respective hopper (16, 16') into the hearth of a blast furnace (10). The discharge assembly (30) comprises an inclined discharge channel (36) having, at its lower end, a material gate (38) providing charge material flow control at the lower end of the discharge channel (36); and a protection ring (50) arranged in the vicinity of the material gate (38) for leading charge material from the discharge channel (36) to a seal seat (46) of the discharge assembly (30). The discharge assembly (30) further comprises a heated panel (52) arranged on the protection ring (50), the heated panel (52) being formed by a panel-like copper body (66) having fluid channels (70) arranged therein so as to form a channel leading from a fluid inlet (72) to a fluid outlet (74).

Description

Shaft Furnace Charging Installation
TECHNICAL FIELD
The present invention generally relates to a shaft furnace charging installation, in particular to a discharge assembly arranged between a storage hopper and the shaft furnace.
BACKGROUND ART
While not limited thereto, the present invention is particularly well suited for use in a shaft furnace charging installation of the Bell Less Top™ type as disclosed in US 3,693,812. In this type of charging installation, the furnace is provided with at least two intermediate storage hoppers, which may be alternately opened to ambient atmosphere for loading material therefrom to the interior of the pressurized furnace via a discharge channel. Such furnace charging installations, as shown in US 4,074,835, employ a pair of serially arranged valves between the storage hopper and the furnace. The first valve or material gate performs a material flow control or metering function, by increasing or reducing the area of the storage hopper discharge opening and thereby assists in the achievement of a desired distribution of material on the furnace hearth. The second valve or sealing valve functions to establish a hermetic seal required to permit the alternate pressurizing and depressurizing of the storage hopper.
In the area of the material gate, dust build-up, due to condensation of blast furnace gas in combination with wet equalizing gas and dust particles from the charge material, may occur. Such dust build-up may accumulate on a protection ring and hinder the material gate from properly closing the hopper discharge opening. The limit switch, which indicates that the material gate is in its closed position, may not be activated. The charging sequence is thereby interrupted and is then necessary either to mechanically remove the build-up or to change the limit switch position. The latter can however cause further problems such as excessive wear on the seal on the sealing valve arranged downstream. This is caused by the fact that the material gate is not correctly closed and that a larger gap allows more charge material to leak through the closed material gate. Also, the dust build-up may be such that, in the closed position of the material gate, the latter rests on the dust build-up, thereby falsifying the weighing results of the charge material fed into the hopper.
In order to avoid such dust build-up, it has been suggested to provide a steam heated panel behind the octagonal chute of the hopper. By heating such a heated panel to a temperature of about 1200C, condensation can be avoided, which means that dust-build-up and its consequences can also be avoided. Such a heated panel consists of a stainless steel casing formed into a shape matching the shape of the octagonal chute. Stainless steel pipes are arranged inside the steel casing and embedded in a heat conductive concrete. It has been found that the conditions of the blast furnace gas are such that the stainless steel casing and/or the stainless steel pipes quickly corrode and that the heated panel is thereby quickly destroyed and steam is allowed to escape from the stainless steel pipes into the blast furnace or hopper environment.
OBJECT OF THE INVENTION
The object of the present invention is to provide an improved blast furnace charging system, wherein the above drawbacks are avoided. This object is achieved by a system as claimed in claim 1.
GENERAL DESCRIPTION OF THE INVENTION
To achieve this object, the present invention proposes a blast furnace charging system for feeding charge material into the hearth of a blast furnace, the system comprising at least two hoppers for temporarily storing charge material, each hopper comprising a discharge assembly for feeding the charge material from the respective hopper into the hearth of a blast furnace. The discharge assembly comprises an inclined discharge channel having, at its lower end, a material gate providing charge material flow control at the lower end of the discharge channel; and a protection ring arranged in the vicinity of the material gate for leading charge material from the discharge channel to a seal seat of the discharge assembly. The discharge assembly further comprises a heated panel arranged on the protection ring, the heated panel being formed by a panel-like copper body having fluid channels arranged therein so as to form a channel leading from a fluid inlet to a fluid outlet. The inventors have found that heated panels made of a panel-like copper body have good corrosion resistance against blast furnace gas, in particular against chlorides in the blast furnace gas. The heated panels according to the present invention therefore have longer lifetime and the risk of steam escaping from the fluid channels is reduced. This leads to a reduced number of maintenance interventions and hence fewer furnace stoppages.
The copper heated panels also provide good heat transfer, enabling the heated plate to be heated to a higher temperature, when compared to the conventional stainless steel heated panels.
The fluid channels in the panel-like copper body may be formed by casting. Alternatively, the fluid channels in the panel-like copper body may be formed by drilling. Plugs may be arranged in the end portions of the drilled fluid channels.
Advantageously, the heated panel has a shape corresponding to the shape of the discharge channel, wherein the panel-like copper body is formed into the shaped heated panel after formation of the fluid channels therein.
The heated panel preferably comprises a connection element for connecting the heated panel to the protection ring.
A wear resistant copper alloy may further be arranged on a lower portion of a front face of the heated panel and on a front face of the connection element. Preferably, the fluid channels comprise a fluid inlet and a fluid outlet, the fluid inlet and outlet being connected to a fluid circuit for delivering a hot fluid, e.g. steam, to the heated panel.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be more apparent from the following description of a not limiting embodiment with reference to the attached drawings, wherein
Fig.1 : is a side view of a bell-less top charging system on a blast furnace; Fig.2: is an enlarged side view of a portion of a discharge assembly of the system of Fig.1 ; and
Fig.3: is a cross-sectional view through a heated panel of the discharge assembly of Fig.2.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In Fig.1 , reference 10 globally identifies a blast furnace. A Bell Less Top™ charging system 12 of the parallel hopper type uses, in a manner known per se, an angularly adjustable rotary chute 14 for distribution of charge material into the hearth of the blast furnace 10. Two storage or top hoppers 16, 16' provide temporary storage of the charge material to be distributed by the chute 14. A conveyor belt mechanism 18 provides feeding of the top hoppers 16, 16' through a feeding assembly 20 arranged above and connected to hoppers 16, 16'. The feeding assembly 20 comprises a collecting cone 22 and a deviation chute 24 for selectively feeding and guiding charge material into either hopper 16 or 16'. Hoppers 16, 16' are constructed as pressure hoppers to insure that the blast furnace 10 remains sealed from the atmosphere during the charging process. Therefore, hoppers 16, 16' having an air lock function are each provided with upper and lower sealing valves (not shown).
A discharge assembly or valve block, globally identified by reference 30 communicates with the lower open ends of the hoppers 16, 16'. Discharge cones 32, 32' at the respective lower open ends of the hoppers 16, 16' are connected by bellows 34, 34' to discharge channels 36, 36'. Throttle valves or material gates 38, 38' provide charge material flow control at the lower ends of the discharge channels 36, 36'. Accordingly, the material gates 38, 38' enable controlled discharge of charge material from the hopper 16 or 16' to the rotary chute 14. The material gates 38, 38' are set by hydraulic drives 40, 40'. Thus, charge material passes from the hoppers 16, 16' over the discharge channels 36, 36' to a central feeding spout 42, which directs the charge material vertically onto the rotary chute 14.
Fig.2 shows in more detail a portion of the discharge assembly 30, showing a discharge channel 36 connected to a discharge cone 32 of a hopper 16. At a lower end 42 of the discharge channel 36, a material gate 38 is pivotably arranged so as to pivot between two positions. In a closed position, as shown in Fig.2, charge material is retained in the discharge channel 36. In an open position, as shown in dotted lined in Fig.2, charge material is allowed to flow out of the discharge channel 36 towards the rotary chute 14. The rate of flow of charge material out of the discharge channel 36 can be regulated by setting the material gate 38 in various intermediate positions. A protective casing 44 is arranged around the discharge assembly 30 and has a seal seat 46 for feeding charge material to the rotary chute 14. A sealing valve 48 is associated with the seal seat 46 for sealing the furnace hearth from the hopper 16, thereby allowing the filling of the hopper 16 with charge material without gas pressure drop in the furnace itself.
In the region of the lower end 42 of the discharge channel 36, the charging system 12 comprises a protection ring 50 generally arranged so as to protect the seal seat 46, in particular when the material gate 38 is almost in its closed position.
The protection ring 50 is provided with a heated panel 52 designed and arranged so as to heat at least a portion of the protection ring 50 in proximity to a gate nose 54 of the material gate 38 when the latter is in its closed position. Due to the heated panel 52, the formation of condensation on the protection ring 50 can be avoided. It should be noted that charging material dust is present in the vicinity of the material gate 38. Dust build up, which may otherwise occur due to the condensation of blast furnace gas in combination with wet equalizing gas and dust particles from the charge material, can be avoided.
The heated panel 52 has an upper edge 56 and a lower edge 58. At the upper edge 56, an so-called air canon 60 is arranged for blowing air at very high speed, generally supersonic speed, onto a front surface 62 of the heated panel 52. This air helps to keep condensation and dust particles away from the front surface 62 of the heated panel 52, thereby avoiding accumulation of dust on the protection ring 50. By keeping the protection ring 50 essentially free from dust build-up, the correct functioning on the material gate 38 can be ensured at least in the sense that the correct closure of the material gate 38 cannot be prevented by such a dust build-up.
Furthermore, the weighing of the charge material in the hopper 16 is adversely influenced if the material gate 38 rests on a dust build-up when in its closed position. By avoiding such a dust build-up, the weighing precision of weighing beams or load cells 64, one of which is shown in Fig.2, is maintained.
The heated panel 52 itself will now be more closely described by referring to Fig.3. The heated panel 52 is formed by a panel-like copper body 66 having a front face 62 and an opposite rear face 68, an upper edge 56 and a lower edge 58 and two side edges. Within the panel-like copper body 66, fluid channels 70 are arranged so as to form a channel leading from a fluid inlet 72 to a fluid outlet 74. The fluid inlet and outlet 72, 74 are connected to a fluid circuit (not shown) feeding a hot fluid, generally steam, through the panel-like copper body 66.
The fluid channels 70 may be formed in the panel-like copper body 66 by casting or drilling. Indeed, the panel-like copper body 66 may be formed by casting the copper around a filler material, which can be removed later to reveal the fluid channels 70. Alternatively, the fluid channels 70 may be drilled into the panel-like copper body 66. Interconnecting fluid channels may also be drilled. Channel portions near the upper, lower or side edges of the panel-like copper body 66 may be plugged after drilling. Such channel portions are necessary to form the fluid channels 70 by drilling but need be plugged to form a continuous channel leading from the fluid inlet 72 to the fluid outlet 74.
After formation of the fluid channels 70 in the panel-like copper body 66, the latter is further bent to a shape corresponding to the shape of the distribution channel 36 and material gate 38.
At its lower edge 58, the heated panel 52 comprises an L-shaped connection element 76 for allowing the heated panel 52 to be connected to the protection ring 50. A wear resistant copper alloy may be hard faced onto a lower portion of the front face 62 of the panel-like copper body 66 and onto the connection element 76 for increasing wear resistance on the connection element 76.
REFERENCE SIGNS
10 blast furnace 48 sealing valve
12 charging system 50 protection ring
14 rotary chute 52 heated panel
16 hopper 54 gate nose
18 conveyor belt mechanism 56 upper edge
20 feeding assembly 58 lower edge
22 collecting cone 60 air canon
24 deviation chute 62 front surface
30 discharge assembly 64 load cell
32 discharge cone 66 panel-like copper body
34 bellow 68 rear face
36 discharge channel 70 fluid channel
38 material gate 72 fluid inlet
40 hydraulic drives 74 fluid outlet
42 central feeding spout 76 connection element
44 protective casing 78 wear resistant copper alloy
46 seal seat

Claims

Claims
1. Blast furnace charging system for feeding charge material into the hearth of a blast furnace, said system comprising at least two hoppers for temporarily storing charge material, each hopper comprising a discharge assembly for feeding said charge material from the respective hopper into the hearth of a blast furnace; said discharge assembly comprising: an inclined discharge channel having, at its lower end, a material gate providing charge material flow control at the lower end of the discharge channel; a protection ring arranged in the vicinity of the material gate for leading charge material from said discharge channel to a seal seat of said discharge assembly; a heated panel arranged on said protection ring, said heated panel being formed by a panel-like copper body having fluid channels arranged therein so as to form a channel leading from a fluid inlet to a fluid outlet.
2. System according to claim 1 , wherein said fluid channels in said panel-like copper body are formed by casting.
3. System according to claim 1 , wherein said fluid channels in said panel-like copper body are formed by drilling.
4. System according to claim 3, wherein plugs are arranged in the end portions of said drilled fluid channels.
5. System according to any of claims 1 to 4, wherein said heated panel has a shape corresponding to the shape of said discharge channel, wherein said panel-like copper body is formed into said shaped heated panel after formation of said fluid channels therein.
6. System according to any of claims 1 to 5, wherein said heated panel comprises a connection element for connecting said heated panel to said protection ring.
7. System according to claim 6, wherein a wear resistant copper alloy is arranged on a lower portion of a front face of the heated panel and on a front face of the connection element.
8. System according to any of claims 1 to 7, wherein said fluid channels comprise a fluid inlet and a fluid outlet, said fluid inlet and outlet being connected to a fluid circuit for delivering a hot fluid to said heated panel.
EP10700743.7A 2009-01-15 2010-01-15 Shaft furnace charging installation Not-in-force EP2387620B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU91513A LU91513B1 (en) 2009-01-15 2009-01-15 Shaft furnace charging installation
PCT/EP2010/050461 WO2010081879A1 (en) 2009-01-15 2010-01-15 Shaft furnace charging installation

Publications (2)

Publication Number Publication Date
EP2387620A1 true EP2387620A1 (en) 2011-11-23
EP2387620B1 EP2387620B1 (en) 2013-09-04

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Application Number Title Priority Date Filing Date
EP10700743.7A Not-in-force EP2387620B1 (en) 2009-01-15 2010-01-15 Shaft furnace charging installation

Country Status (9)

Country Link
US (1) US20110271884A1 (en)
EP (1) EP2387620B1 (en)
KR (1) KR20110110157A (en)
CN (2) CN201440029U (en)
BR (1) BRPI1006860A2 (en)
CA (1) CA2746620A1 (en)
LU (1) LU91513B1 (en)
RU (1) RU2011132472A (en)
WO (1) WO2010081879A1 (en)

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CN118548706B (en) * 2024-07-02 2025-10-28 江西金德铅业股份有限公司 A bottom blowing furnace unloading device

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Also Published As

Publication number Publication date
BRPI1006860A2 (en) 2016-03-15
CN102264918A (en) 2011-11-30
RU2011132472A (en) 2013-02-10
EP2387620B1 (en) 2013-09-04
LU91513B1 (en) 2010-07-16
CA2746620A1 (en) 2010-07-22
WO2010081879A1 (en) 2010-07-22
CN201440029U (en) 2010-04-21
US20110271884A1 (en) 2011-11-10
KR20110110157A (en) 2011-10-06

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