CA2648094C - Shutter mechanism for raw material loading chute of electric furnace - Google Patents
Shutter mechanism for raw material loading chute of electric furnace Download PDFInfo
- Publication number
- CA2648094C CA2648094C CA2648094A CA2648094A CA2648094C CA 2648094 C CA2648094 C CA 2648094C CA 2648094 A CA2648094 A CA 2648094A CA 2648094 A CA2648094 A CA 2648094A CA 2648094 C CA2648094 C CA 2648094C
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- Canada
- Prior art keywords
- raw material
- material loading
- loading chute
- gate plate
- plate
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- 239000002994 raw material Substances 0.000 title claims abstract description 69
- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
-
- 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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- 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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
- F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
-
- 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
- F27D3/0025—Charging or loading melting furnaces with material in the solid state
- F27D3/0032—Charging or loading melting furnaces with material in the solid state using an air-lock
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A shutter mechanism for a raw material loading chute of the electrical furnace enabled to adjust and stop supplying of a raw material by provision of a sliding gate plate 1 that performs percussive hammering on a grate of the raw material loading chute is provided in an arc resistance type electric furnace enabling a molten metal to be obtained by smelting reduction of an oxide ore by carbon, by the following solution means; in which, by remote operation, a gate plate 1 connected to an air pick 20 of a sliding bed plate 5 is guided along a slit groove, advances in a grate of a raw material loading chute in a direction of a blanking plate 11, and cuts off loading of raw material from the raw material loading chute, and because in this process, the gate plate 1 repeatedly performspercussive hammering, large clumps of the raw material are crushed by a plurality of tamping rods on a blade edge of the gate plate 1 and the raw material tamped by the blade edge of the gate plate 1 is discharged from a gap of the blanking plate 11, and because the grate of the raw material loading chute is thus closed by the gate plate 1, the supplying of the raw material by the raw material loading chute can be cut off.
Description
DESCRIPTION
SHUTTER MECHANISM FOR RAW MATERIAL LOADING CHUTE OF ELECTRIC
FURNACE
Technical Field The present invention relates to a shutter mechanism for a raw material loading chute of an arc resistance type electric furnace enabling a molten metal to be obtained by smelting reduction of an oxide ore by carbon.
Background Art As a conventional art, an apparatus for recovering platinum group elements from various substances containing platinum group elements, such as used petrochemical catalysts, used automobile exhaust gas purification catalysts, and used electronic substrates, lead frames, etc., is known (see Japanese Published Unexamined Patent Application No. 2005-54201) .
In the known art, a granular substance to be treated, containing platinum group elements, a granular copper source material, containing copper oxide, a solid reducing material (powder coke) , and a granular flux are mixed together and loaded into a sealed electric furnace. That is, these loaded raw materials are respectively weighed out from a hopper, mixingly conveyed by a screw conveyor, and fed into a material loading chute of the electric furnace. The material loading chute is provided with two stages of shutters, that is, upper stage and lower stage shutters to maintain an airtight state during loading of the raw materials into the electric furnace. First, the upper stage shutter is opened and the lower stage shutter is closed to load just a single batch of raw materials into the material loading chute, and then the upper shutter is closed and the lower shutter is opened to load the single batch of raw materials retained inside the material loading chute. When loading of the single batch of raw materials into the electric furnace ends, the upper and lower shutters are closed in preparation for a subsequent loading operation.
In a general Fe-Ni ferroalloy manufacturing method employed in Japan, after pre-reduction of a Ni oxide ore in a rotary kiln, the ferroalloy is made by smelting and reducing by carbon in an arc resistance type electric furnace (Elkem furnace).
As shown in FIG. 6, calcined ore at 1000 C that has been pre-reduced in a rotary kiln is transferred by means of a refractory container and retained in a raw material loading tank, and the retained calcined ore flows by gravity down a Mk 02648094 2014-05-28 raw material loading chute and is thereby supplied into an electrical furnace set at 1300 C. A grate is disposed at a portion of the raw material loading chute near the electric furnace, and to stop the supplying of the raw material, round steel rods are manually inserted in a transverse direction of the raw material chute into a plurality of round holes formed in a outer circumference of the grate to cut off the flow of the raw material.
Disclosure of the Invention An object of the present invention is to provide, in an arc resistance type electric furnace enabling a molten metal to be obtained by smelting reduction of an oxide ore by carbon, a shutter mechanism for raw material loading chute of electrical furnace enabled to adjust and stop supplying of a raw material by provision of a sliding gate plate that performs percussive hammering on a grate of the raw material loading chute and to perform remote operation for the purpose of safety.
A shutter mechanism for raw material loading chute of electric furnace according to the present invention is provided with a gate plate (1) that moves reciprocatingly while performing percussive hammering on a grate of the raw material loading chute in the vicinity of the grate.
The shutter mechanism for raw material loading chute of electric furnace according to the present invention has, disposed in the vicinity of the grate of the raw material loading chute, a sliding bed plate (5) , driven reciprocatingly by an air motor (21) on the grate of the raw material loading chute, an air pick (20) , installed on the sliding bed plate (5) and performing percussive hammering, the gate plate (1) , connected to a front end of the air pick (20) , and disposed at the grate, a slit groove, guiding the gate plate (1) .
The gate plate (1) is constitutedof a flat, heat-resistant steel plate and a front end of the gate plate (1) is configured as an inclined blade edge.
A plurality of heat-resistant tamping rods are fixed in parallel and at equal intervals on the blade edge of the gate plate (1) .
The shutter mechanism for raw material loading chute of electric furnace according to the present invention enables, by arrangement of just a compressed air source and an operation cable, remote operation without having to enter near the grate of the raw material loading chute.
SHUTTER MECHANISM FOR RAW MATERIAL LOADING CHUTE OF ELECTRIC
FURNACE
Technical Field The present invention relates to a shutter mechanism for a raw material loading chute of an arc resistance type electric furnace enabling a molten metal to be obtained by smelting reduction of an oxide ore by carbon.
Background Art As a conventional art, an apparatus for recovering platinum group elements from various substances containing platinum group elements, such as used petrochemical catalysts, used automobile exhaust gas purification catalysts, and used electronic substrates, lead frames, etc., is known (see Japanese Published Unexamined Patent Application No. 2005-54201) .
In the known art, a granular substance to be treated, containing platinum group elements, a granular copper source material, containing copper oxide, a solid reducing material (powder coke) , and a granular flux are mixed together and loaded into a sealed electric furnace. That is, these loaded raw materials are respectively weighed out from a hopper, mixingly conveyed by a screw conveyor, and fed into a material loading chute of the electric furnace. The material loading chute is provided with two stages of shutters, that is, upper stage and lower stage shutters to maintain an airtight state during loading of the raw materials into the electric furnace. First, the upper stage shutter is opened and the lower stage shutter is closed to load just a single batch of raw materials into the material loading chute, and then the upper shutter is closed and the lower shutter is opened to load the single batch of raw materials retained inside the material loading chute. When loading of the single batch of raw materials into the electric furnace ends, the upper and lower shutters are closed in preparation for a subsequent loading operation.
In a general Fe-Ni ferroalloy manufacturing method employed in Japan, after pre-reduction of a Ni oxide ore in a rotary kiln, the ferroalloy is made by smelting and reducing by carbon in an arc resistance type electric furnace (Elkem furnace).
As shown in FIG. 6, calcined ore at 1000 C that has been pre-reduced in a rotary kiln is transferred by means of a refractory container and retained in a raw material loading tank, and the retained calcined ore flows by gravity down a Mk 02648094 2014-05-28 raw material loading chute and is thereby supplied into an electrical furnace set at 1300 C. A grate is disposed at a portion of the raw material loading chute near the electric furnace, and to stop the supplying of the raw material, round steel rods are manually inserted in a transverse direction of the raw material chute into a plurality of round holes formed in a outer circumference of the grate to cut off the flow of the raw material.
Disclosure of the Invention An object of the present invention is to provide, in an arc resistance type electric furnace enabling a molten metal to be obtained by smelting reduction of an oxide ore by carbon, a shutter mechanism for raw material loading chute of electrical furnace enabled to adjust and stop supplying of a raw material by provision of a sliding gate plate that performs percussive hammering on a grate of the raw material loading chute and to perform remote operation for the purpose of safety.
A shutter mechanism for raw material loading chute of electric furnace according to the present invention is provided with a gate plate (1) that moves reciprocatingly while performing percussive hammering on a grate of the raw material loading chute in the vicinity of the grate.
The shutter mechanism for raw material loading chute of electric furnace according to the present invention has, disposed in the vicinity of the grate of the raw material loading chute, a sliding bed plate (5) , driven reciprocatingly by an air motor (21) on the grate of the raw material loading chute, an air pick (20) , installed on the sliding bed plate (5) and performing percussive hammering, the gate plate (1) , connected to a front end of the air pick (20) , and disposed at the grate, a slit groove, guiding the gate plate (1) .
The gate plate (1) is constitutedof a flat, heat-resistant steel plate and a front end of the gate plate (1) is configured as an inclined blade edge.
A plurality of heat-resistant tamping rods are fixed in parallel and at equal intervals on the blade edge of the gate plate (1) .
The shutter mechanism for raw material loading chute of electric furnace according to the present invention enables, by arrangement of just a compressed air source and an operation cable, remote operation without having to enter near the grate of the raw material loading chute.
An aspect of the invention relates to a shutter mechanism for raw material loading chute of electric furnace comprising: a sliding bed plate on the grate of the raw material loading chute, an air motor for driving the sliding bed plate reciprocatingly, an air pick installed on the said sliding bed plate, a gate plate connected to a front end of the air pick, wherein the said gate plate is disposed in the vicinity of the grate of the raw material loading chute, and moved to opening or shutting the grate reciprocatingly, while performing percussive hammering on the grate by the air pick.
Effects of the Invention The shutter mechanism for raw material loading chute of electric furnace according to the present invention provides an effect that, by providing the gate plate that moves reciprocatingly while performing percussive hammering on the grate of the raw material loading chute, the gate plate can be opened and closed without causing inability to operate the gate plate.
The shutter mechanism for raw material loading chute of electric furnace according to the present invention provides, by use of an air equipment, effects of dust cleaning and cooling of the entire apparatus by an exhaust of a solenoid valve, an exhaust of the air motor, and an exhaust of the air pick.
With the shutter mechanism for raw material loading chute of electric furnace according to the present invention, relief from adverse conditions, adverse environment, and dangerous work is achieved by safe, remote operation of raw material preparation and opening/closing work solely by button operations from outside the electrical furnace.
Brief Description of the Drawings FIG. 1 is a plan view of a shutter mechanism for raw material loading chute of electric furnace according to the present invention.
FIG. 2 is a sectional view of the shutter mechanism taken on line A-A of FIG.1.
FIG. 3 is a side view of the shutter mechanism as viewed from a direction of an arrow B in FIG.1.
FIG. 4 is a plan view of the shutter mechanism for raw material loading chute of electric furnace according to the present invention in a closed state.
FIG. 5 is a longitudinal sectional view of the shutter mechanism for raw material loading chute of electric furnace according to the present invention in a closed state.
FIG. 6 is a schematic view of a conventional raw material loading chute of electric furnace.
Description of Symbols 1 Gate plate 2 Guide cell 3 Fixed frame 4 Fixed frame Sliding bed plate 6 Drive unit base 7 Wire tension bracket 8 Clamp plate 5 9 Guide plate Guide plate 11 Blanking plate 12 Wire roller 13 Scraper =
10 14 Air pick clamp Sprocket fixing bracket 16 Head shaft 17 Drive shaft 18 Air pick chisel 15 19 Air pick chisel receiver Air pick 21 Air motor 22 Coupling 23 Speed reducer 24 Head sprocket 25 Drive sprocket 26 Drive sprocket 27 Drive sprocket 28 Chain tensioner 29 Chain 30 Chain 31 SD shackle 32 Hinged bolt 33 Wire rope 34 Gate receiving roller 35 Gate receiving roller 36 Gate receiving roller 37 Heat resistant packing 40 Solenoid valve Best Modes for Carrying Out the Invention An embodiment of a shutter mechanism for raw material loading chute of electric furnace according to the present invention shall now be described based on the attached drawings.
ak 02648094 2014-05-28 A shutter mechanism for raw material loading chute of electric furnace according to the present invention is shown in a plan view in FIG. 1, and in a sectional view taken on line A-A of FIG.1 in FIG. 2. FIG. 3 is a side view of the shutter mechanism as viewed from a direction of an arrow B in FIG. 1 with illustration of a raw material loading chute portion being omitted.
As shown in the sectional view of FIG. 2, an air motor 21, driven by compressed air upon switching of a solenoid valve by remote operation solely by a button operation from outside the electric furnace, is disposed inside a lower frame of a rectangular fixed frame 3, and a speed reducer 23 is connected via a coupling 22 to an output shaft of the air motor 21.
As shown in the side view of FIG. 3, a drive sprocket 26 of a drive shaft 17 of guide cells 2 is connected via a chain 29 to a drive sprocket 27 of the speed reducer 23, and a drive sprocket 25 is furthermore disposed on the drive shaft 17.
As shown in FIG. 2, the drive sprocket 25 is connected via a chain 30 to a head sprocket 24 of a head shaft 16.
Number 15 in FIG. 3 indicates a sprocket fixing bracket, and number 28 indicates a chain tensioner.
As shown in the side view of FIG. 3, at a central portion of the fixed frame 3, the guide cells 2 are disposed on a drive unit base 6, and a reciprocatingly moving sliding bed plate 5 is disposed across the guide cells 2. As shown in FIG. 3, the drive sprocket 25, around which the chain 30(FIG.2) is wound , is disposed between the two guide cells 2, the guide cells 2 support the plate 5 from below, the guide cells 2 are clamped by plates 8 and the plate 5, and the plate 5, fixed to the chain 30, is moved by the driving of the chain 30. The drive unit base 6 is a supporting member corresponding to being a roof plate suspendingly fixing the air motor 21 and the speed reducer 23.
An air pick 20 that performs percussive hammering is installed on the sliding bed plate 5 and an air pick chisel 18 that transmits the percussive hammering is pressingly secured inside the air pick 20, and the air pick 20 is fixed by an air pick clamp 14.
To the air pick 20, compressed air from an air pressure source is supplied upon switching of a solenoid valve 40 by remote operation by just a button operation from outside the electric furnace, a pair of wire rollers 12 are disposed at respective sides via the clamp plates 8, and to ends of wire ropes 33 wound around the wire rollers 12, hinged bolts 32 are fixed via SD shackles 31 respectively in a manner enabling percussive hammering.
A gate plate 1 is constituted of a flat, heat-resistant steel plate, and a front end of the gate plate 1 is formed to a knife-shaped blade edge that is bilaterally symmetrical at the top and rear, and a plurality of heat-resistant tamping rods are fixed in parallel and at equal intervals to the blade edge.
ak 02648094 2014-05-28 An air pick chisel receiver 19, disposed at a rear end of the gate plate 1, is connectedly fixed to the air pick chisel 18.
Number 7 in FIG. 2 indicates a wire tension bracket.
A short cylinder, provided with flanges at upper and lower portions, is disposed on a grate of the raw material loading chute, a slit groove, into which the gate plate 1 is inserted, is disposed at one side of a circumference of the short cylinder, and the same slit groove and a blanking plate 11, closing off the slit groove in a blanking manner, are disposed at an opposite side.
A fixed frame 4 is disposed at the gate plate 1 side of the slit groove of the short cylinder, and the fixed frame 3, on which the air pick 20 is disposed, is connectedly fixed to the fixed frame 4.
Upper and lower gate receiving rollers 34, guiding the gate plate 1 along the slit groove, gate receiving rollers 35, supporting a horizontal movement of the gate plate 1 from below, and gate receiving rollers 36, guiding respective side surfaces of the gate plate 1, are respectively disposed on the fixed frame 4.
Because dust flies when the gate plate 1 is pressed in and drawn out, two guide plates 9 and 10 are disposed across a heat-resistant packing 37 at a gate plate 1 entrance portion of the slit groove, and a scraper 13 is disposed at an upper portion of the entrance of the slit groove.
Operation and action of the shutter mechanism for raw material loading chute of electric furnace according to the present invention shall now be described based on the attached drawings.
When, to close the grate of the raw material loading chute from a standby state shown in FIGS. 1 and 2, the solenoid valve 40 is switched by remote operation from outside the electric furnace and compressed air is supplied to the air motor 21 via an unillustrated air hose to thereby drive the air motor 21, a rotation shaft of the coupling 22 also rotates, the speed reducer 23 connected to the rotation shaft is driven, the drive shaft 17 is driven via the drive sprocket 27, the chain 29, and the drive sprocket 26, the chain 30 is driven by the drive sprocket 25, and the sliding bed plate 5 fixed to the chain 30 advances.
Meanwhile, by switching of the solenoid valve 40 by remote operation from outside the electric furnace, compressed air is supplied via an unillustrated air hose to the air pick 20, and by reciprocating percussion, the gate plate 1 is made to repeat percussive hammering via the air pick chisel 18 and the air pick chisel receiver 19.
As shown in a plan view in FIG. 4 and a longitudinal sectional view in FIG. 5, the gate plate 1 connected to the air pick 20 of the sliding bed plate 5 is guided along the slit groove, advances in the grate of the raw material loading chute in the direction of the blanking plate 11, and cuts off the loading of raw material from the raw material loading chute.
Because in this process, the gate plate 1 is repeating the percussive hammering, large clumps of the raw material are crushed by the plurality of tamping rods on the blade edge of the gate plate 1 and the raw material tamped by the blade edge of the gate plate 1 is discharged from a gap of the blanking plate 11.
Because the grate of the raw material loading chute is thus closed by the gate plate 1, the supplying of the raw material by the raw material loading chute can be cut off.
To restart the supplying of the raw material, the air motor 21 is driven in reverse so that the slide bed plate 5 retreats, and because the gate plate 1 thus retreats while repeating percussive hammering, the grate can be opened smoothly without succumbing to a load pressure from the raw material loading chute.
Furthermore, by stopping the gate plate 1 at any position, the raw material supply amount can be adjusted.
Effects of the Invention The shutter mechanism for raw material loading chute of electric furnace according to the present invention provides an effect that, by providing the gate plate that moves reciprocatingly while performing percussive hammering on the grate of the raw material loading chute, the gate plate can be opened and closed without causing inability to operate the gate plate.
The shutter mechanism for raw material loading chute of electric furnace according to the present invention provides, by use of an air equipment, effects of dust cleaning and cooling of the entire apparatus by an exhaust of a solenoid valve, an exhaust of the air motor, and an exhaust of the air pick.
With the shutter mechanism for raw material loading chute of electric furnace according to the present invention, relief from adverse conditions, adverse environment, and dangerous work is achieved by safe, remote operation of raw material preparation and opening/closing work solely by button operations from outside the electrical furnace.
Brief Description of the Drawings FIG. 1 is a plan view of a shutter mechanism for raw material loading chute of electric furnace according to the present invention.
FIG. 2 is a sectional view of the shutter mechanism taken on line A-A of FIG.1.
FIG. 3 is a side view of the shutter mechanism as viewed from a direction of an arrow B in FIG.1.
FIG. 4 is a plan view of the shutter mechanism for raw material loading chute of electric furnace according to the present invention in a closed state.
FIG. 5 is a longitudinal sectional view of the shutter mechanism for raw material loading chute of electric furnace according to the present invention in a closed state.
FIG. 6 is a schematic view of a conventional raw material loading chute of electric furnace.
Description of Symbols 1 Gate plate 2 Guide cell 3 Fixed frame 4 Fixed frame Sliding bed plate 6 Drive unit base 7 Wire tension bracket 8 Clamp plate 5 9 Guide plate Guide plate 11 Blanking plate 12 Wire roller 13 Scraper =
10 14 Air pick clamp Sprocket fixing bracket 16 Head shaft 17 Drive shaft 18 Air pick chisel 15 19 Air pick chisel receiver Air pick 21 Air motor 22 Coupling 23 Speed reducer 24 Head sprocket 25 Drive sprocket 26 Drive sprocket 27 Drive sprocket 28 Chain tensioner 29 Chain 30 Chain 31 SD shackle 32 Hinged bolt 33 Wire rope 34 Gate receiving roller 35 Gate receiving roller 36 Gate receiving roller 37 Heat resistant packing 40 Solenoid valve Best Modes for Carrying Out the Invention An embodiment of a shutter mechanism for raw material loading chute of electric furnace according to the present invention shall now be described based on the attached drawings.
ak 02648094 2014-05-28 A shutter mechanism for raw material loading chute of electric furnace according to the present invention is shown in a plan view in FIG. 1, and in a sectional view taken on line A-A of FIG.1 in FIG. 2. FIG. 3 is a side view of the shutter mechanism as viewed from a direction of an arrow B in FIG. 1 with illustration of a raw material loading chute portion being omitted.
As shown in the sectional view of FIG. 2, an air motor 21, driven by compressed air upon switching of a solenoid valve by remote operation solely by a button operation from outside the electric furnace, is disposed inside a lower frame of a rectangular fixed frame 3, and a speed reducer 23 is connected via a coupling 22 to an output shaft of the air motor 21.
As shown in the side view of FIG. 3, a drive sprocket 26 of a drive shaft 17 of guide cells 2 is connected via a chain 29 to a drive sprocket 27 of the speed reducer 23, and a drive sprocket 25 is furthermore disposed on the drive shaft 17.
As shown in FIG. 2, the drive sprocket 25 is connected via a chain 30 to a head sprocket 24 of a head shaft 16.
Number 15 in FIG. 3 indicates a sprocket fixing bracket, and number 28 indicates a chain tensioner.
As shown in the side view of FIG. 3, at a central portion of the fixed frame 3, the guide cells 2 are disposed on a drive unit base 6, and a reciprocatingly moving sliding bed plate 5 is disposed across the guide cells 2. As shown in FIG. 3, the drive sprocket 25, around which the chain 30(FIG.2) is wound , is disposed between the two guide cells 2, the guide cells 2 support the plate 5 from below, the guide cells 2 are clamped by plates 8 and the plate 5, and the plate 5, fixed to the chain 30, is moved by the driving of the chain 30. The drive unit base 6 is a supporting member corresponding to being a roof plate suspendingly fixing the air motor 21 and the speed reducer 23.
An air pick 20 that performs percussive hammering is installed on the sliding bed plate 5 and an air pick chisel 18 that transmits the percussive hammering is pressingly secured inside the air pick 20, and the air pick 20 is fixed by an air pick clamp 14.
To the air pick 20, compressed air from an air pressure source is supplied upon switching of a solenoid valve 40 by remote operation by just a button operation from outside the electric furnace, a pair of wire rollers 12 are disposed at respective sides via the clamp plates 8, and to ends of wire ropes 33 wound around the wire rollers 12, hinged bolts 32 are fixed via SD shackles 31 respectively in a manner enabling percussive hammering.
A gate plate 1 is constituted of a flat, heat-resistant steel plate, and a front end of the gate plate 1 is formed to a knife-shaped blade edge that is bilaterally symmetrical at the top and rear, and a plurality of heat-resistant tamping rods are fixed in parallel and at equal intervals to the blade edge.
ak 02648094 2014-05-28 An air pick chisel receiver 19, disposed at a rear end of the gate plate 1, is connectedly fixed to the air pick chisel 18.
Number 7 in FIG. 2 indicates a wire tension bracket.
A short cylinder, provided with flanges at upper and lower portions, is disposed on a grate of the raw material loading chute, a slit groove, into which the gate plate 1 is inserted, is disposed at one side of a circumference of the short cylinder, and the same slit groove and a blanking plate 11, closing off the slit groove in a blanking manner, are disposed at an opposite side.
A fixed frame 4 is disposed at the gate plate 1 side of the slit groove of the short cylinder, and the fixed frame 3, on which the air pick 20 is disposed, is connectedly fixed to the fixed frame 4.
Upper and lower gate receiving rollers 34, guiding the gate plate 1 along the slit groove, gate receiving rollers 35, supporting a horizontal movement of the gate plate 1 from below, and gate receiving rollers 36, guiding respective side surfaces of the gate plate 1, are respectively disposed on the fixed frame 4.
Because dust flies when the gate plate 1 is pressed in and drawn out, two guide plates 9 and 10 are disposed across a heat-resistant packing 37 at a gate plate 1 entrance portion of the slit groove, and a scraper 13 is disposed at an upper portion of the entrance of the slit groove.
Operation and action of the shutter mechanism for raw material loading chute of electric furnace according to the present invention shall now be described based on the attached drawings.
When, to close the grate of the raw material loading chute from a standby state shown in FIGS. 1 and 2, the solenoid valve 40 is switched by remote operation from outside the electric furnace and compressed air is supplied to the air motor 21 via an unillustrated air hose to thereby drive the air motor 21, a rotation shaft of the coupling 22 also rotates, the speed reducer 23 connected to the rotation shaft is driven, the drive shaft 17 is driven via the drive sprocket 27, the chain 29, and the drive sprocket 26, the chain 30 is driven by the drive sprocket 25, and the sliding bed plate 5 fixed to the chain 30 advances.
Meanwhile, by switching of the solenoid valve 40 by remote operation from outside the electric furnace, compressed air is supplied via an unillustrated air hose to the air pick 20, and by reciprocating percussion, the gate plate 1 is made to repeat percussive hammering via the air pick chisel 18 and the air pick chisel receiver 19.
As shown in a plan view in FIG. 4 and a longitudinal sectional view in FIG. 5, the gate plate 1 connected to the air pick 20 of the sliding bed plate 5 is guided along the slit groove, advances in the grate of the raw material loading chute in the direction of the blanking plate 11, and cuts off the loading of raw material from the raw material loading chute.
Because in this process, the gate plate 1 is repeating the percussive hammering, large clumps of the raw material are crushed by the plurality of tamping rods on the blade edge of the gate plate 1 and the raw material tamped by the blade edge of the gate plate 1 is discharged from a gap of the blanking plate 11.
Because the grate of the raw material loading chute is thus closed by the gate plate 1, the supplying of the raw material by the raw material loading chute can be cut off.
To restart the supplying of the raw material, the air motor 21 is driven in reverse so that the slide bed plate 5 retreats, and because the gate plate 1 thus retreats while repeating percussive hammering, the grate can be opened smoothly without succumbing to a load pressure from the raw material loading chute.
Furthermore, by stopping the gate plate 1 at any position, the raw material supply amount can be adjusted.
Claims (3)
1. A shutter mechanism for raw material loading chute of electric furnace comprising:
a sliding bed plate on the grate of the raw material loading chute, an air motor for driving the sliding bed plate reciprocatingly, an air pick installed on the said sliding bed plate, a gate plate connected to a front end of the air pick, wherein the said gate plate is disposed in the vicinity of the grate of the raw material loading chute, and moved to opening or shutting the grate reciprocatingly, while performing percussive hammering on the grate by the air pick.
a sliding bed plate on the grate of the raw material loading chute, an air motor for driving the sliding bed plate reciprocatingly, an air pick installed on the said sliding bed plate, a gate plate connected to a front end of the air pick, wherein the said gate plate is disposed in the vicinity of the grate of the raw material loading chute, and moved to opening or shutting the grate reciprocatingly, while performing percussive hammering on the grate by the air pick.
2. The shutter mechanism for raw material loading chute of electric furnace according to claim 1, wherein the gate plate comprises a flat, heat-resistant steel plate and a front end of the gate plate is made an inclined blade edge.
3. The shutter mechanism for the raw material loading chute of electric furnace according to claim 2, wherein a plurality of heat-resistant tamping rods are fixed in parallel and at equal intervals on the blade edge of the said gate plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008149038A JP5001222B2 (en) | 2008-06-06 | 2008-06-06 | Shutter mechanism for raw material charging chute of electric furnace |
| JP2008-149038 | 2008-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2648094A1 CA2648094A1 (en) | 2009-12-06 |
| CA2648094C true CA2648094C (en) | 2014-10-07 |
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ID=41412282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2648094A Active CA2648094C (en) | 2008-06-06 | 2008-12-29 | Shutter mechanism for raw material loading chute of electric furnace |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5001222B2 (en) |
| KR (1) | KR101413332B1 (en) |
| CA (1) | CA2648094C (en) |
| FR (1) | FR2932256B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193015A (en) * | 2018-03-20 | 2018-06-22 | 山东钢铁股份有限公司 | A kind of converter feeding chute device and converter blanking fault detection method |
| CN111977352A (en) * | 2020-09-11 | 2020-11-24 | 洪碧环 | Discharging assembly device |
| CN113357913B (en) * | 2021-06-29 | 2022-12-09 | 吉利硅谷(谷城)科技有限公司 | Electromagnetic heating furnace for purifying polycrystalline silicon |
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| JPH0116920Y2 (en) * | 1984-11-28 | 1989-05-17 | ||
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- 2008-12-30 KR KR1020080136918A patent/KR101413332B1/en active IP Right Grant
-
2009
- 2009-01-06 FR FR0950040A patent/FR2932256B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090127212A (en) | 2009-12-10 |
| JP5001222B2 (en) | 2012-08-15 |
| KR101413332B1 (en) | 2014-06-27 |
| FR2932256A1 (en) | 2009-12-11 |
| FR2932256B1 (en) | 2016-07-01 |
| JP2009293877A (en) | 2009-12-17 |
| CA2648094A1 (en) | 2009-12-06 |
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