EP0787809A1 - Vorrichtung zur Beschickung einer Sinteranlage mit Rohsintermischung - Google Patents

Vorrichtung zur Beschickung einer Sinteranlage mit Rohsintermischung Download PDF

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Publication number
EP0787809A1
EP0787809A1 EP97101346A EP97101346A EP0787809A1 EP 0787809 A1 EP0787809 A1 EP 0787809A1 EP 97101346 A EP97101346 A EP 97101346A EP 97101346 A EP97101346 A EP 97101346A EP 0787809 A1 EP0787809 A1 EP 0787809A1
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EP
European Patent Office
Prior art keywords
screen constituting
constituting member
screen
members
pallet
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
EP97101346A
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English (en)
French (fr)
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EP0787809B1 (de
Inventor
Hideaki C/O Nkk Corporation Sato
Yoshinori C/O Nkk Corporation Fujiwara
Hirosi C/O Nkk Corporation Yamamoto
Kenji C/O Nkk Corporation Okubo
Hidetoshi Nkk Corporation Noda
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JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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Publication of EP0787809A1 publication Critical patent/EP0787809A1/de
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Publication of EP0787809B1 publication Critical patent/EP0787809B1/de
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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
    • 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
    • F27B19/00—Combinations of furnaces of kinds not covered by a single preceding main group
    • 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
    • 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
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material

Definitions

  • the present invention relates to an apparatus for charging raw sinter mix on a traveling pallet of a sintering machine for manufacturing sintered ore to be used as a blast furnace material.
  • a sintering machine manufactures the sintered ore in such a manner that a raw sinter mix produced by mixing iron ore fines with coke fines, lime stone fines and the like is charged to a pallet to form a bed and the iron ore fines are sintered by burning the coke fines in the bed while the pallet is moved.
  • the raw sinter mix must be charged onto the pallet in the state that the grain size of the raw sinter mix is properly segregated in the thickness direction of the bed, that is, in the state that a finer material is deposited toward an upper layer of the bed in order to secure the gas permeability of the bed and burning property of the coke fines when the raw mix is sintered.
  • a charging apparatus disclosed in Japanese Unexamined Patent Publication No. 5-1335 as an apparatus permitting the grain-size-segregated-charge of the raw sinter mix.
  • the apparatus is provided with a screen-shaped chute disposed below a supply mechanism such as a roll feeder in the state that it is inclined downward in the direction opposite to a pallet moving direction.
  • the screen-shaped chute has such a structure that a multiplicity of rods are disposed at intervals in parallel with the width direction of the pallet with the intervals between the rods made narrower toward the upper portion of the chute.
  • FIG. 18 shows how a raw sinter mix is charged by the above charging apparatus, in which the raw sinter mix which is supplied from a supply mechanism 40 and falls down while sliding on a screen-shaped chute 41 is sieved according to the grain size thereof when it drops onto a pallet 43 through the intervals between rods 42 because the intervals between the rods 42 constituting the screen-shaped chute 41 are made narrower toward the upper side of the chute, so that a material having a larger grain size is charged to the starting side of the pallet 43.
  • the bed formed after the material is charged has such a grain size segregation that a material of finer grain size is distributed to an upper layer of the bed.
  • the charging apparatus having the screen-shaped chute 41 as described above has a problem that the spaces between the rods 42 are clogged in a short time with the lime stone fines and coke fines which are adhered to the rods 42 of the screen-shaped chute 41 and the intrinsic function of the screen-shaped chute 41 cannot be achieved.
  • Japanese Unexamined Patent Publication No. 7-229684 proposes an apparatus arranged such that wire ropes are employed in place of the rods of the screen-shaped chute, the directions of one set or a plurality of sets of endless wire ropes are sequentially changed through pulleys to form a multiplicity of wire rope portions parallel with the width direction of a pallet as well as guide members for supporting the wires and also scraping off adhered materials are disposed to at intermediate positions of the wire rope portions disposed parallel with each other at several positions and the wire rope portions are inserted through the guide holes of the guide members.
  • Each of the endless wire ropes is restricted between a pair of driving pulleys as a driving unit or wound around a driving drum about several times and the endless wire ropes are moved in circulation or reciprocation by the driving force thereof.
  • the present invention provides an apparatus for charging raw sinter mix to a sintering machine comprising:
  • the screen-shaped chute comprises a plurality of screen constituting member groups and a plurality of guide members for guiding the screen constituting members.
  • the plurality of screen constituting member groups are disposed in parallel with each other at intervals in the lengthwise direction of the pallet.
  • the plurality of guide members are disposed at intervals in the widthdirection of the pallet.
  • the screen constituting member group comprises at least one screen constituting member.
  • the outside surface of the screen constituting member is preferably coated with a resin.
  • the screen constituting member is a wire or a rod.
  • the guide member has guide holes to permit the screen constituting members to pass therethrough.
  • a plastic bush is preferably arranged to inside of the guide hole.
  • the transfer means comprises: a connecting menber for connecting the respective one ends of two adjacent screen constituting member groups; a rotatable follower sprocket wheel for changing moving directions of the two adjacent screen constituting member groups each other; and drive means for move the two adjacent screen constituting member groups in an opposite direction each other.
  • At least a portion of the connecting menber is composed of a chain in the lengthwise direction thereof. The chain is engaged around the rotatable follower sprocket wheel.
  • the drive means for move the two adjacent screen constituting member groups is preferably a chain-sprocket wheel system, a rack-pinion system, or a cylinder system.
  • said drive means includes connecting means for connecting the other ends of two adjacent screen constituting member groups; and said connecting means includes chain means which is engaged with the driving sprocket wheel.
  • the drive means can comprise: a pair of driving sprocket wheels which are disposed coaxially; and a pair of chains which are engaged around the pair of driving sprocket wheels in an opposite direction each other. The ends of the pair of chains are connected to the other ends of two adjacent screen constituting member groups.
  • the drive means can comprise: a driving sprocket wheel; and a chain which is engaged around the driving sprocket wheel. The ends of the chain are connected to the other ends of two adjacent screen constituting member groups.
  • the drive means further comprises: a timer for driving the driving sprocket wheel at arbitrary time intervals; and means for changing a direction of rotation of the driving sprocket wheel.
  • the screen constituting member group is a screen constituting member or at least two screen constituting members.
  • the two adjacent screen constituting member groups move in an opposite direction each other.
  • the two adjacent screen constituting member groups can be a screen constituting member group composed of a screen constituting member and a screen constituting member group composed of at least two screen constituting members.
  • FIG. 1 is a perspective view showing an embodiment of an apparatus for charging raw sinter mix according to the present invention.
  • FIG. 2 is a perspective view showing a pair of screen constituting member groups constituting a unit and a driving mechanism thereof in the embodiment shown in FIG. 1.
  • FIG. 3 is a front elevational view showing a chain locking mechanism to a driving sprocket wheel which is applied to the embodiments shown in FIG. 1 and FIG. 2.
  • FIG. 4 is a front elevational view showing another chain locking mechanism to the driving sprocket wheel which is applied to the embodiments shown in FIG. 1 and FIG. 2.
  • FIG. 5 is a partial perspective view showing a guide member in the apparatus for charging raw sinter mix according to the present invention.
  • FIG. 6 is a front elevational view showing a breakage sensing mechanism provided with the apparatus for charging raw sinter mix according to the present invention.
  • FIG. 7 is a perspective view showing a pair of screen constituting members constituting a unit and a driving mechanism thereof according to the present invention.
  • FIG. 8 is a perspective view showing a screen constituting member group and a screen constituting member constituting a unit and a driving mechanism thereof according to the present invention.
  • FIG. 9 is a perspective view showing a pair of screen constituting member groups constituting a unit and a driving mechanism thereof according to the present invention.
  • FIG. 10 is a perspective view partially showing a pair of screen constituting member groups constituting a unit and the driving mechanism thereof according to the present invention.
  • FIG. 11 is a perspective view partially showing a pair of screen constituting member groups constituting a unit and the driving mechanism thereof according to the present invention.
  • FIG. 12 are graphs showing the transitions of productivity of sinter, unit consumption of coke fines, unit consumption of return fines, TI and percentage of -4 mm sinter.
  • FIG. 13 is a graph showing the distribution of grain size in the thickness direction of the bed when a raw sinter mix is charged using an apparatus of the present invention in Example 2.
  • FIG. 14 is a graph showing the distribution of grain size in the thickness direction of the bed when the raw sinter mix is charged using the conventional apparatus in Example 2.
  • FIG. 15 is a graph showing the distribution of coke content in the thickness direction of the bed when the raw sinter mix is charged using the apparatus of the present invention in Example 2.
  • FIG. 16 is a graph showing the distribution of coke content in the thickness direction of the bed when the raw sinter mix is charged using the conventional apparatus in Example 2.
  • FIG. 17A and FIG. 17B are graphs showing the temperature distribution in the width direction of a pallet under the grate of the sintering machine in the sintering operation of Example 3.
  • FIG. 18 is a view explaining the principle of a grain-size-segregated-charge executed by a apparatus for charging raw sinter mix provided with a screen-shaped chute.
  • FIG. 1 and FIG. 2 show an embodiment of an apparatus for charging raw sinter mix of the present invention.
  • the apparatus for charging raw sinter mix includes a supply mechanism 1 for supplying a raw sinter mix onto a pallet and a screen-shaped chute 2 disposed below the material supply mechanism 1.
  • the supply mechanism 1 includes a raw sinter mix hopper 3, and a roll feeder and a drum chute 4' for feeding the raw sinter mix from the opening at the lower end of the hopper.
  • the arrangement of the supply mechanism 1 is not limited to the above embodiment but may be arranged such that, for example, a belt conveyer is provided in place of the hopper 3, the roll feeder 4 and the drum chute 4' so that the raw sinter mix is directly supplied onto the screen-shaped chute 2 from an end of the belt conveyer.
  • the screen-shaped chute 2 which is used to charge the raw sinter mix supplied from the supply mechanism 1 onto the pallet ( not shown ) in the state that the grain size of the material is segregated in a thickness direction of the bed, is disposed such that it is inclined downward in the direction opposite to a pallet moving direction as well as the upper end thereof is located approximately just below the feed unit (the roll feeder 4 in the embodiment ) of the supply mechanism 1.
  • the screen-shaped chute 2 includes a plurality of screen constituting members 5 which are composed of wire-shaped members (for example, wire ropes or the like) or bar-shaped members (for example, solid or hollow rods or the like) and disposed approximately in parallel with the width direction of the pallet and guide members 6 which support the screen constituting members 5 at the intermediate portions thereof as well as perform a function for scraping off the raw sinter mix adhered to the outside surfaces of the screen constituting members.
  • wire-shaped members for example, wire ropes or the like
  • bar-shaped members for example, solid or hollow rods or the like
  • the plurality of screen constituting members 5 are movable in the width direction of the pallet with respect to the guide members 6 and disposed in the lengthwise direction (moving direction) of the pallet at suitable intervals in parallel with each other.
  • These screen constituting members 5 constitute the chute surface of the screen-shaped chute 2 and are disposed so that the interval between adjacent screen constituting members 5 is made narrower toward the upper portions thereof to permit the raw sinter mix to be charged in a grain-size-segregated state.
  • the magnitude of the intervals may be, for example, continuously varied from the interval w 1 to the interval w n for every intervals or varied stepwise such as intervals w 1 -w 4 , w 5 - w 8 ... for every several intervals, thus magnitude of the intervals may be arbitrarily set. Consequently, the structure of the present invention for making the interval of adjacent screen constituting members narrower toward the upper portion of the chute includes the above various fashions.
  • the screen constituting members 5 may be disposed to any one of a linear-shape, a concavely-curved-shape and the like in the lengthwise direction the pallet, it is particularly preferable to dispose them entirely to the concavely-curved-shape or to the linear-shape only at the upper portion of the chute and to the concavely-curved-shape in the portion following the above portion as shown in FIG. 18 to securely sieve the raw sinter mix by a screen by reducing the slidingly falling velocity of the material.
  • the screen constituting members 5 may be composed of the wire ropes, the rods (including the hollow rods) or the like as described above, the wire ropes are particularly preferable from the view point of a cost, strength, handling and the like, thus the screen constituting members 5 of the embodiment are also composed of the wire ropes.
  • the cross sectional shape of the screen constituting members 5 may be arbitrarily formed.
  • the plurality of guide members 6 are disposed at suitable intervals in the width direction of the pallet and supported and fixed by not shown support members such as frames or the like.
  • Each of the guide members 6 has a plurality of guide holes 7 formed in the lengthwise direction thereof at intervals to permit the screen constituting members 5 to pass therethrough and the screen constituting members 5 slidingly pass through these guide holes 7.
  • These guide members 6 support the long screen constituting members 5 at the intermediate portions thereof so as to keep the intervals between the screen constituting members as well as perform the function for scraping off the raw sinter mix adhered to the outside surfaces of the screen constituting members 5 when they move and pass through the guide holes 7.
  • the interval between adjacent guide members 6 is selected taking the above functions into consideration, they are usually disposed at the interval of about 800 - 1300 mm.
  • a set of a screen constituting member group A is composed of each two adjacent screen constituting members 5, 5 of the plurality of screen constituting members 5 constituting the chute surface by connecting both the ends of the screen constituting members 5, 5 by a coupling member 23, thus the structure example includes a total of 8 sets of screen constituting member groups A 1 - A 8 . Then, each two sets of adjacent screen constituting member groups A, A (that is, A 1 - A 2 , A 3 - A 4 , A 5 - A 6 , A 7 - A 8 ) of these screen constituting member groups A are arranged as one unit through which the screen constituting members 5 carry out a synchronous moving operation.
  • the respective one ends of the two sets of adjacent screen constituting member groups A, A constituting one unit are connected by a connecting member 8 having a chain 9 at the intermediate portion thereof as well as the other ends thereof are connected to the driving portion (chains 10a, 10b) of a driving unit 16 to be described below.
  • the screen-shaped chute 2 includes a plurality of follower sprocket wheels 12 around which the chains 9 of the connecting members 8 corresponding to the above respective units disposed at an end thereof in the width direction of the pallet and the driving unit 16 composed of a plurality of pairs of driving sprocket wheels 13a, 13b corresponding to the respective units and the chains 10a, 10b to be wound around them disposed at the other end thereof.
  • Each one pair of the driving sprocket wheels 13a, 13b constituting the driving unit 16 are disposed coaxially with to a driving shaft 14 which is driven in rotation by a not shown motor or the like. Further, the chains 10a, 10b are wound around the driving sprocket wheels 13a, 13b in an opposite direction each other.
  • any one of the two sets of the screen constituting member groups A, A makes a going-motion and the other of them makes a returning-motion.
  • FIG. 3 and FIG. 4 show structure examples for the purpose.
  • FIG. 3 shows an structure example in which the end 100 of a chain 10 is secured to a driving sprocket wheel 13
  • FIG. 4 shows an structure example in which a guide member 15 is disposed to restrict the chain 10 around a portion of the outside periphery of the driving sprocket wheel 13.
  • the driving sprocket wheels 13a, 13b must have an outside diameter which is sufficient to permit the portion of a chain having the length of "the winding surplus of the chain” + “the moving amount of the screen constituting member” to be wound around the outside periphery thereof.
  • the positions of the follower sprocket wheels 12 is made adjustable in the width direction of the pallet with respect to the driving sprocket wheels 13a, 13b on the fixed side so that tension is applied to the screen constituting members 5 constituting the screen constituting member groups A as well as the tension is made arbitrarily adjustable.
  • brackets 17 for rotatably holding the follower sprocket wheels 12 are supported by a fixed base portion 18 through support members 19 each of which is provided with a length adjustment mechanism 20 (for example, a turnbuckle or known means making use of a long hole), so that the positions of the follower sprocket wheels 12 can be adjusted in the width direction of the pallet by adjusting the length of the support members 19.
  • a length adjustment mechanism 20 for example, a turnbuckle or known means making use of a long hole
  • numeral 27 denotes guide sprocket wheels for guiding the chains 10a, 10b.
  • a bush 34 composed of a resin (for example, an urethane resin) to the inside of each of the guide holes 7 of the guide members 6 to thereby prevent the wear of the screen constituting members 5 which slide in the guide holes as shown in FIG. 5.
  • a resin for example, an urethane resin
  • FIG. 6 shows an embodiment in which a breakage sensor 21 is disposed to sense the breakage of the screen constituting member 5 at once if it should be broken.
  • an end of the support member 19 of the follower sprocket wheel 12 is mounted so as to be able to be inclined in a lower direction with respect to the fixed base portion 18 and the switch lever 22 of a limit switch constituting the breakage sensor 21 is disposed below the support member 19, so that the switch lever 22 is actuated by the support member 19 which is inclined downward when the screen constituting members 5 is broken (cut off) to thereby instantly sense the breakage of the screen constituting member 5.
  • the structure of the breakage sensor 21 is not limited to the one shown in FIG. 6 but any appropriate arrangement may be employed such as, for example, a tension sensor disposed to the intermediate portion of the support member 19 or the portion where the support member 19 is mounted to the fixed base portion 18, or the like.
  • each of the screen constituting member groups A may be composed of the arbitrary number of at least two of the screen constituting members 5 and further the two sets of the screen constituting member groups constituting one unit may have the different number of the screen constituting members 5 constituting the group.
  • each two adjacent screen constituting members 5 may be moved as one unit as shown in FIG. 7. That is, in this case, the respective one ends of the two adjacent screen constituting members 5, 5 are connected by the connecting member 8 having the chain 9 as well as the respective other ends thereof are connected to the chains 10a, 10b constituting the driving unit 16 directly or through a suitable connecting member.
  • any one of the two screen constituting members 5, 5 constituting the one unit makes a going-motion and the other of them makes a returning-motion.
  • one set of the screen constituting member group A and one screen constituting member 5 adjacent to it may be moved as one unit. That is, in this case, the screen constituting member group A is arranged by connecting both the ends of at least two adjacent screen constituting members 5 by the coupling member 23 and the respective one ends of the screen constituting member group A and the screen constituting member 5 adjacent to it are connected by the connecting member 8 having the chain 9 as well as the respective other ends of the screen constituting member group A and the screen constituting member 5 are connected to the chains 10a, 10b constituting the driving unit 16 directly or through the connecting member 11.
  • the screen constituting member group A may be composed of the arbitrary number of at least two of the screen constituting members 5 also in this case.
  • any one of the screen constituting member group A and the screen constituting member 5 constituting the one unit makes a going-motion and the other of them makes a returning-motion.
  • FIG. 9 shows another embodiment using the driving unit 16a of the chain/sprocket wheel system.
  • the other ends (driving sides) of the two sets of the screen constituting member groups A, A constituting one unit are also connected by a connecting member 24 having a chain 25 at the intermediate portion thereof likewise the one ends (the follower sides) and the chain 25 is wound around a horizontal type driving sprocket wheel 26.
  • a connecting member 24 having a chain 25 at the intermediate portion thereof likewise the one ends (the follower sides) and the chain 25 is wound around a horizontal type driving sprocket wheel 26.
  • the driving unit 16 shown in FIG. 9 is also applicable to the embodiments of FIG. 7, FIG. 8 and the like.
  • any one of the two sets of screen constituting member groups A, A constituting the one unit makes a going-motion and the other of them makes a returning-motion.
  • numeral 33 in the drawing denotes guide sprocket wheels for guiding the chain 25. Since the other arrangements are the same as those shown in FIG. 1 and FIG. 2, the same numerals are used to denote them and the detailed description of them is omitted.
  • FIG. 10 and FIG. 11 show another embodiment using a driving unit other than the chain sprocket wheel system.
  • FIG. 10 shows an embodiment using a driving unit 16 of a rack/pinion system
  • FIG. 11 shows an embodiment using a driving unit 16 of a cylinder system employing an air cylinder or the like.
  • FIG. 10 The structure shown in FIG. 10 is arranged such that a pair of parallel rack members 28a, 28b is disposed to the other ends of two sets of screen constituting member groups A, A constituting one unit so as to be movable in the width direction of the pallet along guides 29 with the rack portions thereof confronting each other as well as a pinion 30 to be meshed with both the rack portions 280 is interposed between both the rack members 28a, 28b and the respective rack members 28a, 28b are connected to the respective other ends of the screen constituting member groups A, A through connecting members 31.
  • any one of the rack members 28a, 28b makes a going-motion and the other of them makes a returning-motion and as the rack members 28a, 28b move, the screen constituting member groups A, A also make a going- and returning-motions.
  • FIG. 11 the structure shown in FIG. 11 is arranged such that a pair of cylinder units 32a, 32b (air cylinders, hydraulic cylinders etc.) is disposed to the other ends of two sets of screen constituting member groups A, A constituting one unit and the respective actuating rods 320 of the pair of cylinder units 32a, 32b are connected to the respective other ends of the screen constituting member groups A, A through the connecting members 31.
  • a pair of cylinder units 32a, 32b air cylinders, hydraulic cylinders etc.
  • the driving units 16 shown in FIG. 10 and FIG. 11 are also applicable as the driving units of any one of the embodiments shown in FIG. 1, FIG. 2 and FIG. 7 -FIG. 9.
  • the apparatus of the present invention may dispose a sheet-shaped chute above the screen-shaped chute 2 in place of the drum chute 4, that is, the sheet-shaped chute may be disposed approximately just below the material discharge portion and the screen-shaped chute 2 may be disposed on a line extending from the sheet-shaped chute downward. Further, the apparatus may employs a structure in which no drum chute 4' and sheet-shaped chute are provided.
  • the basic grain-size-segregated charging function achieved by the screen-shaped chute 2 constituting the apparatus of the present invention is similar to that of the conventional apparatus shown in FIG. 18.
  • the driving unit 16 is driven at predetermined time intervals while the apparatus is run as well as the driving sprocket wheels 13a, 13b are alternately rotated in an opposite direction each time the driving unit 16 is driven to thereby cause the pair of screen constituting member groups A, A constituting each unit to make going-and returning-motions in the width direction of the pallet.
  • the moving stroke of the going- and returning-motions of the screen constituting members 5 is set longer than the interval between adjacent guide members 6.
  • the driving sprocket wheels 13a, 13b are rotated in the directions of the arrows of the solid lines in FIG. 2 to thereby move the screen constituting member groups A, A in the directions of the arrows of the solid lines and stop them after they are moved, for example, 1100 mm. Then, after a predetermined period of time (for example, about 15 minutes) elapses, the driving sprocket wheels 13a, 13b are rotated in the directions of the arrows of the broken lines which are opposite to the above rotational directions to thereby move the screen constituting member groups A, A in the directions of the arrows of the broken lines and stop them when they return to original positions. Thereafter, the respective screen constituting member groups A, A are caused to make the going- and returning-motions by repeating the above driving and stopping operations.
  • a predetermined period of time for example, about 15 minutes
  • the raw sinter mix adhered to the outside surfaces of the screen constituting members 5 is scraped off when they pass through the guide holes 7 of the guide members 6, since the moving distance (stroke) of the screen constituting members 5 is larger than the intervals between the guide members 6, the entire length of the screen constituting members 5 pass through the guide holes 7 of the guide members 6 each time the screen constituting members 5 move (going- or returning-motion), so that the raw sinter mix adhered to the outside surfaces thereof is properly removed. Then, since the screen constituting members 5 are moved at suitable time intervals, the adhesion and deposition of the raw sinter mix to the outside surfaces of the screen constituting members 5 can be effectively suppressed.
  • the above operation can be also obtained by the embodiments shown in FIG. 7 - FIG. 9, FIG. 10 and FIG. 11 likewise.
  • the screen constituting member groups A, A can be caused to make going- and returning-motions at a predetermined stroke, respectively, by for example, forwardly and reversely rotating the driving sprocket wheel 26 at a predetermined time interval likewise the above embodiment in the case of the embodiment of FIG. 9, forwardly and reversely rotating the pinion 30 at a predetermined time interval in the case of the embodiment of FIG. 10 and further advancing and retracting the actuating rods 320 of the pair of cylinder units 32a, 32b in an opposite direction each other at a predetermined time interval in the case of the structure example of FIG. 11.
  • the driving conditions and using fashion of the screen constituting members may be arbitrarily selected in the apparatus of the present invention and they are not limited to the above fashions.
  • the apparatus of the present invention is arranged such that the pair of screen constituting members 5, 5 or the screen constituting member groups A, A are arranged as one unit, the one ends thereof are coupled by the chain 9 and the chain 9 is wound around the follower sprocket wheel 12, the driving unit 16 of the chain/sprocket wheel system, the rack-pinion system or the cylinder system is provided and the driving portion thereof is connected to the other ends of the screen constituting members 5 or the screen constituting member groups A, problems caused in the conventional apparatus by using the driving drum or the driving pulley are entirely eliminated, thus the screen constituting members 5 are accurately moved by the amount of a set stroke as well as the grain-size segregated-charging function intrinsic to the apparatus can be stably maintained for a long time.
  • the mechanical means such as the chain/sprocket wheels, racks/pinions and the like constituting the follower side and driving side mechanisms does not intrinsically cause the problem of slip, extension and the like and further since there is no room for making winding displacement, twist, friction and the like which wound be caused when a wire rope is wound around the driving drum, there is no possibility for causing the aforesaid problems (1) - (5) in the conventional apparatus.
  • a apparatus for charging raw sinter mix of the present invention shown in FIG. 1 and FIG 2 was disposed to a sintering machine and a sintering operation was carried out using the apparatus for charging raw sinter mix.
  • the amount of raw sinter mix (iron ore fines, lime stone fines , coke fines and return fines ) to be supplied was set to 980 tons/hour.
  • the apparatus for charging raw sinter mix of the present invention was arranged such that screen constituting members 5 constituting a screen-shaped chute 2 was composed of wire ropes and the number of them was set to 22 pieces.
  • the interval between adjacent screen constituting members 5 was set to 20 mm at the uppermost side thereof and to 24 mm at the lowermost side thereof so that the interval was made narrower toward the upper side of the chute.
  • the eight screen constituting members 5 on the upper side of the chute were disposed to a linear-shape (angle to a horizontal plane: 58 degrees) and the screen constituting members 5 below them were disposed to a concavely-curved-shape.
  • An 11 mm outside diameter wire rope composed of a rope main body (iron core wire) with an outside diameter of 4 mm and having an outside surface covered with an urethane resin was used as the wire ropes constituting the screen constituting members 5. Further, a bush 34 of a polyurethane resin having an inside diameter of 12 mm was mounted to each of the guide holes 7 of guide members 6 for supporting the screen constituting members 5 and inserted through the screen constituting member 5.
  • Driving sprocket wheels 13a, 13b were driven at the interval of every 15 minutes and rotated in an opposite direction each time so that the screen constituting members 5 made going- and returning-motions in the width direction of the pallet.
  • FIG. 12 are graphs showing the transitions of the sintering operation using the apparatus for charging raw sinter mix of the present invention in comparison with those of the conventional apparatus without the mechanism for moving the screen constituting members. Since a proper grain-size-segregated charge was carried out in the sintering operation using the charging apparatus of the present invention, the uniformity of a sintered state was greatly improved in the width direction of the pallet as compared with the case that the conventional apparatus was used. As a result, the unit consumption of return fines was reduced by about 14 kg/ton of sinter as compared with that of the conventional apparatus and a yield of sinter was greatly enhanced.
  • a sintering operation was carried out using an apparatus similar to that of Example 1 under the same operation conditions as Example 1, a material was sampled from a total of five positions in the thickness direction of the bed ( bed height: about 580 mm ) in the vicinity of a charging portion during the operation and the average grain size of the material at the respective sampling positions and the coke ( carbon ) content in the material were examined.
  • FIG. 13 - FIG. 16 show the result of the examination in comparison with the case that the conventional apparatus without the mechanism for moving the screen constituting members was used.
  • FIG. 13 (the apparatus of the present invention ) and FIG. 14 (the conventional apparatus ) show the average grain size in the thickness direction of the bed and FIG. 15 ( the apparatus of the present invention) and FIG. 16 (the conventional apparatus) show the coke (carbon) content in the material in the layer thickness direction.
  • FIG. 17 shows the result of examination in comparison with the case that the conventional apparatus without the mechanism for moving the screen constituting members was used.
  • FIG. 17A there is shown a temperature distribution when a material layer, which was charged in about 100 - 110 minutes after a screen-shaped chute was cleaned, passed
  • FIG. 17B there is shown a temperature distribution when a material layer, which was charged in about 5 minutes - a little shorter than 15 minutes after the screen constituting members were moved once, passed, respectively.
  • the screen constituting members such as the wire ropes and the like constituting the screen-shaped chute can be moved smoothly and accurately for a long period of time without causing the problem of the extension, twist, wear, breakage and the like of the wire ropes and the like
  • the function for removing a raw sinter mixadhered to the outside surfaces of the screen constituting members and the grain-size-segregated-charging function which is intrinsic to the apparatus can be stably maintained for a long period of time.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
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  • Manufacture And Refinement Of Metals (AREA)
EP97101346A 1996-01-31 1997-01-29 Vorrichtung zur Beschickung einer Sinteranlage mit Rohsintermischung Expired - Lifetime EP0787809B1 (de)

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JP37440/96 1996-01-31
JP3744096 1996-01-31
JP03744096A JP3336848B2 (ja) 1996-01-31 1996-01-31 焼結原料の装入装置

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EP0787809A1 true EP0787809A1 (de) 1997-08-06
EP0787809B1 EP0787809B1 (de) 1999-09-22

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KR (1) KR100228253B1 (de)
AU (1) AU693730B2 (de)
BR (1) BR9700827A (de)
DE (1) DE69700535T2 (de)
IN (1) IN191111B (de)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1040047C (zh) * 1993-03-27 1998-09-30 华南理工大学 一种磁卡数据读/写器
EP3489371A1 (de) * 2017-11-24 2019-05-29 Tata Steel IJmuiden B.V. Abstreifervorrichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020053270A (ko) * 2000-12-27 2002-07-05 이구택 슬릿바 부착광 제거장치를 갖는 슬릿 슈트
CN102032790B (zh) * 2009-09-30 2013-01-02 中冶长天国际工程有限责任公司 支撑板清洁式溜槽偏析布料器及偏析布料装置
JP6003508B2 (ja) * 2012-10-09 2016-10-05 新日鐵住金株式会社 焼結原料装入装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE259282C (de) *
JPS5426905A (en) * 1977-08-02 1979-02-28 Sumitomo Metal Ind Ltd Charging method for raw material for sintering
US4457840A (en) * 1981-07-27 1984-07-03 Voest-Alpine Aktiengesellschaft Apparatus for delivering a stream of green pellets
DE3521781C1 (de) * 1985-06-19 1986-06-19 Elino Industrie-Ofenbau Carl Hanf GmbH + Co, 5160 Düren Beschickungsvorrichtung
EP0286381A2 (de) * 1987-04-06 1988-10-12 Nippon Steel Corporation Vorrichtung und Verfahren zum Beschicken eines Sinterbandes mit Rohgut
JPH07229684A (ja) * 1993-12-24 1995-08-29 Nkk Corp 焼結原料の装入装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63206436A (ja) * 1987-02-23 1988-08-25 Nippon Steel Corp 焼結原料の装入方法及び装置
JPH0816250B2 (ja) * 1987-02-23 1996-02-21 新日本製鐵株式会社 焼結原料の装入方法及び装入装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE259282C (de) *
JPS5426905A (en) * 1977-08-02 1979-02-28 Sumitomo Metal Ind Ltd Charging method for raw material for sintering
US4457840A (en) * 1981-07-27 1984-07-03 Voest-Alpine Aktiengesellschaft Apparatus for delivering a stream of green pellets
DE3521781C1 (de) * 1985-06-19 1986-06-19 Elino Industrie-Ofenbau Carl Hanf GmbH + Co, 5160 Düren Beschickungsvorrichtung
EP0286381A2 (de) * 1987-04-06 1988-10-12 Nippon Steel Corporation Vorrichtung und Verfahren zum Beschicken eines Sinterbandes mit Rohgut
JPH07229684A (ja) * 1993-12-24 1995-08-29 Nkk Corp 焼結原料の装入装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 050 (C - 044) 27 April 1979 (1979-04-27) *
PATENT ABSTRACTS OF JAPAN vol. 095, no. 011 26 December 1995 (1995-12-26) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1040047C (zh) * 1993-03-27 1998-09-30 华南理工大学 一种磁卡数据读/写器
EP3489371A1 (de) * 2017-11-24 2019-05-29 Tata Steel IJmuiden B.V. Abstreifervorrichtung

Also Published As

Publication number Publication date
JP3336848B2 (ja) 2002-10-21
TW347465B (en) 1998-12-11
KR970059702A (ko) 1997-08-12
KR100228253B1 (ko) 1999-11-01
EP0787809B1 (de) 1999-09-22
DE69700535T2 (de) 2000-02-03
AU693730B2 (en) 1998-07-02
IN191111B (de) 2003-09-20
DE69700535D1 (de) 1999-10-28
BR9700827A (pt) 1998-07-07
AU1019797A (en) 1997-11-13
JPH09210566A (ja) 1997-08-12

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