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WO2017109281A1 - Strand sintering furnace and windbox for a strand sintering furnace - Google Patents

Strand sintering furnace and windbox for a strand sintering furnace Download PDF

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Publication number
WO2017109281A1
WO2017109281A1 PCT/FI2016/050901 FI2016050901W WO2017109281A1 WO 2017109281 A1 WO2017109281 A1 WO 2017109281A1 FI 2016050901 W FI2016050901 W FI 2016050901W WO 2017109281 A1 WO2017109281 A1 WO 2017109281A1
Authority
WO
WIPO (PCT)
Prior art keywords
windbox
section
sintering furnace
exhaust gas
conveyor belt
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.)
Ceased
Application number
PCT/FI2016/050901
Other languages
French (fr)
Inventor
Simo NENONEN
Ari Ceder
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.)
Outotec Finland Oy
Original Assignee
Outotec Finland Oy
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 Outotec Finland Oy filed Critical Outotec Finland Oy
Publication of WO2017109281A1 publication Critical patent/WO2017109281A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates

Definitions

  • the invention relates to a strand sintering furnace comprising a number of sequential process zones having different temperature conditions as defined in the preamble of independent claim 1.
  • the invention also relates to a windbox for a strand sintering furnace comprising a number of sequential process zones having different temperature conditions as defined in the preamble of independent claim 10.
  • a layer of material is formed on a conveyor belt in a sintering furnace, the layer being called herein a material bed.
  • the material bed is conveyed by the conveyor belt through the process zones of the sintering furnace, which have different temperatures.
  • gas is conducted through the conveyor base and the material bed when the material bed travels through the process zones.
  • Each process zone is normally provided with a windbox configured to promote conduction of gas through the conveyor base and the material bed.
  • the windboxes can for example be connected to suction means in order to promote conduction of gas through the conveyor base and the material bed.
  • the object of the invention is to provide an improved strand sintering furnace and an improved windbox for a strand sintering furnace.
  • the strand sintering furnace of the invention is characterized by the definitions of independent claim 1.
  • the windbox for a strand sintering furnace of the invention is correspondingly characterized by the definitions of independent claim 10.
  • Figure 1 is a schematical illustration of a strand sintering furnace
  • Figure 2 shows a first embodiment of a windbox for a strand sintering furnace
  • Figure 3 shows a second embodiment of a windbox for a strand sintering furnace
  • Figure 4 shows a third embodiment of a windbox for a strand sintering furnace.
  • the strand sintering furnace comprising a number of sequential process zones 1 having different temperature conditions and some embodiments and variants of the strand sintering furnace will be described in greater detail.
  • the strand sintering furnace comprising a conveyor belt 2 that is arranged as an endless loop around a deflector roll 3 and a driven roll 4 and which conveyor belt 2 is configured to convey a pellet bed (not illustrated in the figures) through said sequential process zones 1 of the strand sintering furnace, said conveyor belt 2 being gas permeable.
  • Each sequential process zone 1 is provided with an upper gas feeding arrangement 5 configured to conduct gas to be sucked through the pellet bed and the conveyor belt 2 to the process zone 1.
  • Each process zone 1 is provided with a lower exhaust gas arrangement 6 configured to conduct gas that was sucked through the pellet bed and the conveyor belt 2 away from the process zone 1.
  • Each lower exhaust gas arrangement 6 comprising a windbox 7 that is sealed towards the conveyor belt 2 by means of sealing means 8.
  • the windbox 7 is divided into windbox sections 9 by dividing wall members 10.
  • At least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to individually the exhaust gas flow in each windbox section 9.
  • the windbox 7 is provided with a damper 11 configured to individually the exhaust gas flow in each windbox section 9.
  • the strand sintering furnace comprising an exhaust gas collection channel 14 that is configured to conduct gas from each windbox section 9 of the windbox 7,
  • the strand sintering furnace comprising a windbox channel 15 between the exhaust gas collection channel 14 and each windbox section 9 of the windbox 7.
  • the damper 11 configured to adjust the exhaust gas flow in said at least one windbox section 9 is arranged in the windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7.
  • each windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to adjust the exhaust gas flow in a windbox section 9 of the windbox 7.
  • Each windbox section 9 has preferably, but not necessarily, a bottom 16 that is at least partly inclined and/or curved towards a first end 17 of the windbox section 9 forming a downstream end of the windbox section 9, and one windbox channel 15 of the windbox channels 15 is preferably, but not necessarily, connected to each windbox section 9 at said downstream end of the windbox section 9, as shown in figures 2 to 4.
  • the windbox sections 9 are preferably, but not necessarily, arranged in alternating order so that the bottom 16 of every second every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a first side 12 of the windbox 7 and so that the bottom 16 of every second every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a second side 13 of the windbox 7, which second side 12 is on the opposite side of the windbox in relation to the first side 12.
  • the windbox section 9 may, as shown in the figures, be longitudinal windbox sections 9 extending in a direction of movement A of the conveyor belt 2.
  • Each exhaust duct has preferably, but not necessarily, a circular cross section as shown in figures 2 to 4.
  • the windbox sections 9 may be formed of separate windbox section modules releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox section modules 19 can be replaced.
  • the windbox channel 15 may be releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox channel 15 can be replaced.
  • At least one windbox section 9, preferably each windbox section 9, can be provided with an emergency cooling valve 18, as shown in figures 3 and 4.
  • a purpose of the emergency cooling valve is to provide cooling gas from the outside of the windbox sections 9 of the windbox 7 in case the temperature pf the conveyor belt 2 in the process zone 1 in which the windbox 7 is arranged rises too high.
  • At least one windbox channel 15, preferably each windbox channel 15, can be provided with an emergency cooling valve 18, as shown in figure 2.
  • windbox 7 for a strand sintering furnace comprising a number of sequential process zones 1 having different temperature conditions and some embodiments and variants of the windbox 7 will be described in greater detail.
  • the windbox 7 comprises sealing means 8 for sealing the windbox 7 towards a conveyor belt 2 of the strand sintering furnace, which conveyor belt 2 is arranged as an endless loop around a deflector roll 3 and a driven roll 4 and which conveyor belt 2 is configured to convey a pellet bed through said sequential process zones 1 of the strand sintering furnace, said conveyor belt 2 being gas permeable.
  • the windbox 7 is divided into windbox sections 9 by dividing wall members 10.
  • At least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to adjust the gas flow in said at least one windbox section 9.
  • the windbox 7 is provided with a damper 11 configured to individually the exhaust gas flow in each windbox section 9.
  • the windbox 7 comprises an exhaust gas collection channel 14 that is configured to conduct gas from each windbox section 9 of the windbox 7.
  • the windbox 7 comprises a windbox channel 15 between the exhaust gas collection channel 14 and each windbox section 9 of the windbox 7.
  • the damper 11 configured to adjust the exhaust gas flow in said at least on windbox section 9 is arranged in the windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7.
  • each windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to adjust the exhaust gas flow in a windbox section 9 of the windbox 7.
  • Each windbox section 9 has preferably, but not necessarily, a bottom 16 that is at least partly inclined and/or curved towards a first end 17 of the windbox section 9 forming a downstream end of the windbox section 9, and one windbox channel 15 of the windbox channels 15 is preferably, but not necessarily, connected to each windbox section 9 at said downstream end of the windbox section 9, as shown in figures 2 to 4.
  • the windbox sections 9 are preferably, but not necessarily, arranged in alternating order so that the bottom 16 of every second, every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a first side 12 of the windbox 7 and so that the bottom 16 of every second every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a second side 13 of the windbox 7, which second side is on the opposite side of the windbox 7 in relation to the first side 12.
  • the windbox section 9 may, as shown in the figures, be longitudinal windbox sections 9 extending in a direction of movement A of the conveyor belt 2.
  • Each exhaust duct has preferably, but not necessarily, a circular cross section as shown in figures 2 to 4.
  • the windbox sections 9 may be formed of separate windbox section modules 19 releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox section modules 19 can be replaced also in existing windboxed for upgrading or modernization purposes
  • the windbox channel 15 may be releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox channels 15 can be replaced.
  • each windbox section 9 can be provided with an emergency cooling valve 18, as shown in figures 3 and 4.
  • each windbox channel 15 can be provided with an emergency cooling valve 18, as shown in figure 2. It is apparent to a person skilled in the art that as technology advanced, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples and which is described in the description or in the figures, but they may vary within the scope of the claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)

Abstract

The invention relates to a strand sintering furnace and to a windbox (7) for a strand sintering furnace comprising a number of sequential process zones (1). The windbox (7) comprises sealing means (8) for sealing the windbox (7) towards a conveyor belt (2) of the strand sintering furnace. The windbox (7) is divided into windbox sections (9), and at least one windbox section (9) of the windbox (7) is provided with a damper (11) configured to individually adjust the exhaust gas flow in said at least one windbox section (9). The windbox (7) comprises an exhaust gas collection channel (14) and a windbox channel (15) between the exhaust gas collection channel (14) and each windbox section (9) of the windbox (7). The damper (11) configured to adjust the exhaust gas flow in said at least one windbox section (9) is arranged in the windbox channel (15).

Description

STRAND SINTERING FURNACE AND WINDBOX FOR A STRAND
SINTERING FURNACE
Field of the invention
The invention relates to a strand sintering furnace comprising a number of sequential process zones having different temperature conditions as defined in the preamble of independent claim 1.
The invention also relates to a windbox for a strand sintering furnace comprising a number of sequential process zones having different temperature conditions as defined in the preamble of independent claim 10.
In strand sintering of mineral material, a layer of material is formed on a conveyor belt in a sintering furnace, the layer being called herein a material bed. The material bed is conveyed by the conveyor belt through the process zones of the sintering furnace, which have different temperatures. During the conveyance, gas is conducted through the conveyor base and the material bed when the material bed travels through the process zones. Each process zone is normally provided with a windbox configured to promote conduction of gas through the conveyor base and the material bed. The windboxes can for example be connected to suction means in order to promote conduction of gas through the conveyor base and the material bed. Objective of the invention
The object of the invention is to provide an improved strand sintering furnace and an improved windbox for a strand sintering furnace.
Short description of the invention
The strand sintering furnace of the invention is characterized by the definitions of independent claim 1.
Preferred embodiments of the strand sintering furnace are defined in the dependent claims 2 to 9.
The windbox for a strand sintering furnace of the invention is correspondingly characterized by the definitions of independent claim 10.
Preferred embodiments of the windbox are defined in the dependent claims 11 to 18. Because the damper configured to adjust the exhaust gas flow in said at least one windbox section is provided in the windbox channel between the exhaust gas collection channel and said at least one windbox section of the windbox, several advantages are achieved. One advantage is that the windbox is easy to service. Another advantage is that the windbox has a simple construction, which means that it is also inexpensive to manufacture. The invention can also be utilized when upgrading or modernizing existing windboxes. List of figures
In the following the invention will described in more detail by referring to the figures, of which
Figure 1 is a schematical illustration of a strand sintering furnace,
Figure 2 shows a first embodiment of a windbox for a strand sintering furnace,
Figure 3 shows a second embodiment of a windbox for a strand sintering furnace, and Figure 4 shows a third embodiment of a windbox for a strand sintering furnace.
Detailed description of the invention
First the strand sintering furnace comprising a number of sequential process zones 1 having different temperature conditions and some embodiments and variants of the strand sintering furnace will be described in greater detail.
The strand sintering furnace comprising a conveyor belt 2 that is arranged as an endless loop around a deflector roll 3 and a driven roll 4 and which conveyor belt 2 is configured to convey a pellet bed (not illustrated in the figures) through said sequential process zones 1 of the strand sintering furnace, said conveyor belt 2 being gas permeable.
Each sequential process zone 1 is provided with an upper gas feeding arrangement 5 configured to conduct gas to be sucked through the pellet bed and the conveyor belt 2 to the process zone 1.
Each process zone 1 is provided with a lower exhaust gas arrangement 6 configured to conduct gas that was sucked through the pellet bed and the conveyor belt 2 away from the process zone 1.
Each lower exhaust gas arrangement 6 comprising a windbox 7 that is sealed towards the conveyor belt 2 by means of sealing means 8.
The windbox 7 is divided into windbox sections 9 by dividing wall members 10.
At least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to individually the exhaust gas flow in each windbox section 9. Preferably, the windbox 7 is provided with a damper 11 configured to individually the exhaust gas flow in each windbox section 9.
The strand sintering furnace comprising an exhaust gas collection channel 14 that is configured to conduct gas from each windbox section 9 of the windbox 7,
The strand sintering furnace comprising a windbox channel 15 between the exhaust gas collection channel 14 and each windbox section 9 of the windbox 7.
The damper 11 configured to adjust the exhaust gas flow in said at least one windbox section 9 is arranged in the windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7. Preferably, each windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to adjust the exhaust gas flow in a windbox section 9 of the windbox 7.
Each windbox section 9 has preferably, but not necessarily, a bottom 16 that is at least partly inclined and/or curved towards a first end 17 of the windbox section 9 forming a downstream end of the windbox section 9, and one windbox channel 15 of the windbox channels 15 is preferably, but not necessarily, connected to each windbox section 9 at said downstream end of the windbox section 9, as shown in figures 2 to 4. In such case, the windbox sections 9 are preferably, but not necessarily, arranged in alternating order so that the bottom 16 of every second every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a first side 12 of the windbox 7 and so that the bottom 16 of every second every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a second side 13 of the windbox 7, which second side 12 is on the opposite side of the windbox in relation to the first side 12.
The windbox section 9 may, as shown in the figures, be longitudinal windbox sections 9 extending in a direction of movement A of the conveyor belt 2.
Each exhaust duct has preferably, but not necessarily, a circular cross section as shown in figures 2 to 4.
The windbox sections 9 may be formed of separate windbox section modules releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox section modules 19 can be replaced.
The windbox channel 15 may be releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox channel 15 can be replaced.
At least one windbox section 9, preferably each windbox section 9, can be provided with an emergency cooling valve 18, as shown in figures 3 and 4. A purpose of the emergency cooling valve is to provide cooling gas from the outside of the windbox sections 9 of the windbox 7 in case the temperature pf the conveyor belt 2 in the process zone 1 in which the windbox 7 is arranged rises too high.
At least one windbox channel 15, preferably each windbox channel 15, can be provided with an emergency cooling valve 18, as shown in figure 2.
Next the windbox 7 for a strand sintering furnace comprising a number of sequential process zones 1 having different temperature conditions and some embodiments and variants of the windbox 7 will be described in greater detail.
The windbox 7 comprises sealing means 8 for sealing the windbox 7 towards a conveyor belt 2 of the strand sintering furnace, which conveyor belt 2 is arranged as an endless loop around a deflector roll 3 and a driven roll 4 and which conveyor belt 2 is configured to convey a pellet bed through said sequential process zones 1 of the strand sintering furnace, said conveyor belt 2 being gas permeable.
The windbox 7 is divided into windbox sections 9 by dividing wall members 10.
At least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to adjust the gas flow in said at least one windbox section 9. Preferably, the windbox 7 is provided with a damper 11 configured to individually the exhaust gas flow in each windbox section 9.
The windbox 7 comprises an exhaust gas collection channel 14 that is configured to conduct gas from each windbox section 9 of the windbox 7.
The windbox 7 comprises a windbox channel 15 between the exhaust gas collection channel 14 and each windbox section 9 of the windbox 7.
The damper 11 configured to adjust the exhaust gas flow in said at least on windbox section 9 is arranged in the windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7. Preferably, each windbox channel 15 between the exhaust gas collection channel 14 and said at least one windbox section 9 of the windbox 7 is provided with a damper 11 configured to adjust the exhaust gas flow in a windbox section 9 of the windbox 7.
Each windbox section 9 has preferably, but not necessarily, a bottom 16 that is at least partly inclined and/or curved towards a first end 17 of the windbox section 9 forming a downstream end of the windbox section 9, and one windbox channel 15 of the windbox channels 15 is preferably, but not necessarily, connected to each windbox section 9 at said downstream end of the windbox section 9, as shown in figures 2 to 4. In such case, the windbox sections 9 are preferably, but not necessarily, arranged in alternating order so that the bottom 16 of every second, every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a first side 12 of the windbox 7 and so that the bottom 16 of every second every third, every fourth or every fifth windbox section 9 being least partly inclined and/or curved towards a second side 13 of the windbox 7, which second side is on the opposite side of the windbox 7 in relation to the first side 12.
The windbox section 9 may, as shown in the figures, be longitudinal windbox sections 9 extending in a direction of movement A of the conveyor belt 2.
Each exhaust duct has preferably, but not necessarily, a circular cross section as shown in figures 2 to 4.
The windbox sections 9 may be formed of separate windbox section modules 19 releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox section modules 19 can be replaced also in existing windboxed for upgrading or modernization purposes
The windbox channel 15 may be releasable attached at the windbox 7. This makes maintenance work easier, because single separate windbox channels 15 can be replaced.
At least one, preferably each windbox section 9 can be provided with an emergency cooling valve 18, as shown in figures 3 and 4.
At least one, preferably each windbox channel 15 can be provided with an emergency cooling valve 18, as shown in figure 2. It is apparent to a person skilled in the art that as technology advanced, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples and which is described in the description or in the figures, but they may vary within the scope of the claims.

Claims

Claims
1. A strand sintering furnace comprising a number of sequential process zones (1) having different temperature conditions, wherein the strand sintering furnace comprising
a conveyor belt (2) that is arranged as an endless loop around a deflector roll (3) and a driven roll (4) and which conveyor belt (2) is configured to convey a pellet bed through said sequential process zones (1) of the strand sintering furnace, said conveyor belt (2) being gas permeable,
wherein each sequential process zone (1) being provided with an upper gas feeding arrangement (5) configured to conduct gas to be sucked through the pellet bed and the conveyor belt (2) to the process zone (1),
wherein each process zone (1) being provided with a lower exhaust gas arrangement (6) configured to conduct gas that was sucked through the pellet bed and the conveyor belt (2) away from the process zone (1),
wherein each lower exhaust gas arrangement (6) comprising a windbox (7) that is sealed towards the conveyor belt (2) by means of sealing means (8),
wherein the windbox (7) being divided into windbox sections (9) by dividing wall members (10), and
wherein at least one windbox section (9) of the windbox (7) being provided with a damper (11) configured to adjust the exhaust gas flow in said at least one windbox section (9), characterized
by an exhaust gas collection channel (14) that is configured to conduct gas from each windbox section (9) of the windbox (7),
by a windbox channel (15) between the exhaust gas collection channel (14) and each windbox section (9) of the windbox (7), and
by the damper (11) configured to adjust the exhaust gas flow in said at least one windbox section (9) being arranged in the windbox channel (15) between the exhaust gas collection channel (14) and said at least one windbox section (9) of the windbox (7).
2. The strand sintering furnace according to claim 1, characterized
by each windbox section (9) having a bottom (16) that is at least partly inclined and/or curved towards a first end (17) of the windbox section (9) forming a downstream end of the windbox section (9), and
by one windbox channel (15) of the windbox channels (15) being connected to each windbox section (9) at said downstream end of the windbox section (9).
3. The strand sintering furnace according to claim 2, characterized by the windbox sections (9) being arranged in alternating order so that the bottom (16) of every second windbox section (9) being least partly inclined and/or curved towards a first side (12) of the windbox (7) and so that the bottom (16) of every second windbox section (9) being least partly inclined and/or curved towards a second side (13) of the windbox (7), which second side (13) is on the opposite side of the windbox (7) in relation to the first side (12).
4. The strand sintering furnace according to any of the claims 1 to 3, characterized by the windbox section (9) being a longitudinal windbox section (9) extending in a direction of movement of the conveyor belt (2).
5. The strand sintering furnace according to any of the claims 1 to 4, characterized by the exhaust duct having a circular cross section.
6. The strand sintering furnace according to any of the claims 1 to 5, characterized by the windbox sections (9) being formed of separate windbox section modules (19) releasable attached at the windbox (7).
7. The strand sintering furnace according to any of the claims 1 to 6, characterized by the windbox channels (15) being releasable attached at the windbox (7)
8. The strand sintering furnace according to any of the claims 1 to 7, characterized by at least one windbox section (9) being provided with an emergency cooling valve (18).
9. The strand sintering furnace according to any of the claims 1 to 8, characterized by at least one windbox channel (15) being provided with an emergency cooling valve (18).
10. A windbox (7) for a strand sintering furnace comprising a number of sequential process zones (1) having different temperature conditions, wherein the windbox (7) comprising
sealing means (8) for sealing the windbox (7) towards a conveyor belt (2) of the strand sintering furnace, which conveyor belt (2) is arranged as an endless loop around a deflector roll (3) and a driven roll (4) and which conveyor belt (2) is configured to convey a pellet bed through said sequential process zones (1) of the strand sintering furnace, said conveyor belt (2) being gas permeable,
wherein the windbox (7) being divided into windbox sections (9) by dividing wall members (10), and
wherein at least one windbox section (9) of the windbox (7) being provided with a damper (11) configured to adjust the exhaust gas flow in said at least one windbox section (9) , characterized
by an exhaust gas collection channel (14) that is configured to conduct gas from each windbox section (9) of the windbox (7),
by a windbox channel (15) between the exhaust gas collection channel (14) and each windbox section (9) of the windbox (7), and
by the damper (11) being configured to adjust the exhaust gas flow in said at least on windbox section (9) being arranged in the windbox channel (15) between the exhaust gas collection channel (14) and said at least one windbox section (9) of the windbox (7).
11. The windbox according to claim 10, characterized
by each windbox section (9) having a bottom (16) that is at least partly inclined and/or curved towards a first end (17) of the windbox section (9) forming a downstream end of the windbox section (9), and
by one windbox channel (15) of the windbox channels (15) being connected to each windbox section (9) at said downstream end of the windbox section (9).
12. The windbox according to claim 11, characterized by the windbox sections (9) being arranged in alternating order so that the bottom (16) of every second windbox section (9) being least partly inclined and/or curved towards a first side (12) of the windbox (7) and so that the bottom (16) of every second windbox section (9) being least partly inclined and/or curved towards a second side (13) of the windbox (7), which second side (13) is on the opposite side of the windbox (7) in relation to the first side (12).
13. The windbox according to any of the claims 10 to 12, characterized by the windbox section (9) being a longitudinal windbox section (9) extending in a direction of movement of the conveyor belt (2).
14. The windbox according to any of the claims 10 to 13, characterized by the exhaust duct has a circular cross section.
15. The windbox according to any of the claims 10 to 14, characterized by the windbox sections (9) being formed of separate windbox section modules (19) releasable attached at the windbox (7)
16. The windbox according to any of the claims 10 to 15, characterized by the windbox channels (15) being releasable attached at the windbox (7).
17. The windbox according to any of the claims 10 to 16, characterized by at least one windbox section (9) being provided with an emergency cooling valve (18).
18. The windbox according to any of the claims 10 to 17, characterized by at least one windbox channel (15) being provided with an emergency cooling valve (18).
PCT/FI2016/050901 2015-12-21 2016-12-20 Strand sintering furnace and windbox for a strand sintering furnace Ceased WO2017109281A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20155982A FI20155982A (en) 2015-12-21 2015-12-21 BAND STEERING OVEN AND AIR BOX FOR A BAND STEERING OVEN
FI20155982 2015-12-21

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WO2017109281A1 true WO2017109281A1 (en) 2017-06-29

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1474859A (en) * 1919-10-08 1923-11-20 Walter G Swart Sintering apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1474859A (en) * 1919-10-08 1923-11-20 Walter G Swart Sintering apparatus

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Publication number Publication date
FI20155982A7 (en) 2017-06-22
FI20155982A (en) 2017-06-22

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