JP2014109417A - Bedding ore charging device of dwight-lloyd sintering machine and production method of sintered ore - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bedding ore charging device which can smooth an upper face of bedding ores charged into a sintering pallet at a relatively-low cost when producing the sintered ores by using a Dwight-Lloyd type sintering machine, prevents the fall of fine grains of the bedding ores even if slit-shaped clearances of a grate face of the sintering pallet are expanded with age, and can reduce a basis unit of the bedding ores, and a production method of the sintered ores.SOLUTION: A sintered ore hopper 35 is arranged while adjoining to the front of a bedding ore charging device main body 21. In a place in which a clearance measurement value of a clearance sensor 42 becomes larger than a clearance reference value out of the slit-shaped clearances of the grate face 10 of the sintering pallet 2, the clearances are blocked by the sintered ores 36 which are discharged from the sintered ore hopper 35.

Description

  The present invention relates to a floor-laying ore charging apparatus and a method for producing sintered ore of a Dwightroid type sintering machine for producing sintered ore used as a main raw material for a blast furnace or the like.

  FIG. 1 shows a schematic diagram of a dwelloid-type sintering machine for producing sintered ore. In FIG. 1, the Dwightroid type sintering machine 1 has a sintering pallet 2 that travels on an endless track, mixes coke powder and lime powder with iron ore, prepares the raw material, and moves the raw material. The sintered pallet 2 is charged. Next, the coke on the surface portion of the raw material charged in the sintering pallet 2 is ignited by the ignition device 3, and the coke is burned while sucking air from the wind box 4 below the sintering pallet 2. Sinter the iron ore to produce sintered ore.

  When charging the raw material into the pallet of the sintering machine, in order to prevent the fine-grained raw material from falling from the great (lattice) surface of the sintered pallet 2, on the great surface of the sintered pallet 2, First, a floor covering ore made of coarse product sintered ore is charged from the floor covering hopper 5, and a sintering raw material blended thereon is charged from the sintering raw material hopper 6.

  FIG. 2 shows an example of a conventional blended raw material supply apparatus that charges flooring ore and blended raw materials on a sintered pallet. The apparatus shown in FIG. 2 is difficult to extract a sufficient amount of coarse-grained sintered ore from the product-sintered ore for the flooring ore, and uses a mixed bed of fine and coarse particles. In this case, the flooring ore is tilted in the direction opposite to the pallet traveling direction directly under the chute from the flooring hopper 5 in which fine and coarse grained flooring ore is mixed and charged. By loading on the pallet 2 that travels through the provided grizzly type classifier 8, the coarse-grained ore with a particle size larger than the pallet's grate interval is laid directly on the grate surface 10, and from this A fine-floored ore with a small particle size is laid on the upper surface of the coarse-grained ore. (For example, refer to Patent Document 1).

  That is, a grizzly type classifier 8 is provided at the lower end of the dropping chute 7 of the floor mine 5 and the inclined surface of the grizzly type classifier 8 is dropped and sintered with the coarse portion of the falling floor mine as a sieve. It is dropped on the upstream part of the pallet 2, and the fine-grained part is sieved and dropped on the sintering pallet 2 on the lower part of the grizzly type classifier 8 on which coarse-grained flooring ore is laid. Reference numeral 9 denotes a gate for adjusting the discharge amount from the floor mine hopper 5. Thereby, it is possible to preferentially charge the coarse bedding ore onto the sintering pallet 2, so that it is possible to prevent the fine bedding ore from falling from the great surface 10 of the sintering pallet 2. it can. The raw material in the sintering raw material hopper 6 is quantitatively cut out by the rotary feeder 11 or the like, and charged onto the flooring ore of the sintering pallet 2 through the chute 12 or the like.

  In the case where only coarse-grained sintered ore is used as the flooring ore, the flooring ore hopper may be one that does not have the grizzly type classifier 8 in FIG. A type that uses a roll feeder to cut out flooring ore is used.

  In addition, in the Dwytroid type sintering machine shown in FIG. 1, the bedding ore charged on the sintering pallet 2 is placed on the upper portion of the sintering pallet 2 between the hopper 5 for flooring ore and the hopper 6 for sintering raw material. It is known that a flooring raw material layer having a uniform layer thickness and packing density in the width direction of the sintered pallet can be obtained by providing a flooring raw material laying device that makes the layer thickness uniform (for example, (See Patent Document 2). FIG. 3 is a top view of the floor covering raw material laying device 13 of Patent Document 2, and FIG. 4 is a front view of the floor covering raw material laying device 13 of Patent Document 2 in the pallet width direction. The flooring raw material laying device 13 corresponds to a scraper that levels the surface of the flooring ore on the sintering pallet 2.

  In order to improve the yield of sintered ore, it is necessary to uniformly fire a sintered cake produced by firing a sintering raw material with a sintering machine. In order to uniformly sinter the sintered cake, it is important to make the sintering raw material charged on the sintering pallet uniform. To that end, the floor charged on the great surface of the sintering pallet is important. It is necessary that the upper surface of the slag be smoothed horizontally in the width direction of the sintering pallet (the direction perpendicular to the traveling direction of the sintering pallet).

  However, when the conventional technique as described in Patent Document 1 is used, when the flooring ore is supplied from the flooring ore hopper to the great upper surface of the sintered pallet through the drop chute or the like, the flooring ore layer The thickness changed in the width direction of the sintering pallet, and there was a problem that the upper surface of the flooring ore charged on the upper surface of the sintering pallet could not be smoothed horizontally.

  Moreover, when smoothing the upper surface of the flooring ore charged on the sintering pallet using a flooring raw material laying apparatus (scraper) as described in Patent Document 2, the side wall (side wall: The bedding ore near 14) in FIGS. 3 and 4 is pressed against the side wall side of the sintering pallet and rises in a mountain shape at the side wall portion, and it is difficult to smooth the entire width of the sintering pallet. Furthermore, the floor-laying material laying apparatus has a complicated structure and a large number of components and members. Therefore, there is a problem that it takes a lot of labor and cost to maintain these components and members.

  In addition, the floor-laying ore charging apparatus described in Patent Document 2 has the following problems in addition to the above-described smoothing problem. That is, the floor covering ore charged on the sintering pallet has a coarse (fine) and fine particles mixed almost uniformly, so the great (grid) surface of the sintering pallet (2 in FIGS. 3 and 4). Since the slit-shaped opening gap of 5 to 6 mm, fine particles with a diameter smaller than this gap fall downward from the slit-shaped gap on the grate (lattice) surface, and can be effectively used as flooring ore. The problem is that the basic unit of bedding mine increases by the amount of falling.

  On the other hand, in Patent Document 3, when producing sintered ore using a dweroid-type sintering machine, the upper surface of the flooring ore charged in the sintering pallet at a relatively low cost, Disclosed is a floor-laying ore charging apparatus for a dweroid type sintering machine and a method for producing a sintered ore that can be horizontally smoothed in the width direction of the sintering pallet.

  The embodiment is shown in FIGS. 5 and 6, 21 is a floor laying charging device, 22 is a floor mine upper hopper, 23 is a floor mine lower hopper, 24 is a cutting gate, 25 is a shutter, 28 is a sprocket, 30a and 30b are floors It is a bedding mine.

  In addition, if the floor-laying ore charging apparatus and the method for producing the sintered ore of the Dwightroid type sintering machine described in Patent Document 3 shown in FIGS. 5 and 6 are used, the Dwightroid type firing is performed at a relatively low cost. Although the upper surface of the floor laying ore charged in the sintering pallet of the kneading machine can be smoothed horizontally in the width direction of the sintering pallet, the fine grains are slit-shaped with a great (lattice) surface as in Patent Document 2. There is a problem that the base unit of the floor mine increases by this amount because it falls downward from the gap.

  On the other hand, if the floor-laying ore charging device and the method for producing the sintered ore of the Dwightroid type sintering machine described in Patent Document 4 are used, the dwelling type sintering machine can be sintered at a relatively low cost. The upper surface of the flooring ore charged in the pallet can be smoothed horizontally in the width direction of the sintered pallet, and the fine grains are slits in the grate (lattice) surface, which is a problem in Patent Document 2 and Patent Document 3. It is known that it can be suppressed to some extent from falling downward from the gaps in the shape, and the basic unit of bedding ore can be reduced.

  By the way, the floor laying ore charging apparatus of the Dwightroid type sintering machine described in Patent Document 4 is an apparatus having a hopper and a shutter for charging the flooring ore into the sintering pallet of the Dwightroid type sintering machine. A floor mine hopper with a gate cut out at the bottom and a floor mine upper hopper installed below the floor mine upper hopper and discharged from the floor mine upper hopper The floor mine lower hopper is open at the bottom, and the width of the lower part of the floor mine lower hopper is approximately the same as the width of the sintered pallet, and the lower part is approximately the same width as the sintered pallet. The floor mine lower hopper is provided with a shutter that is movable up and down and flat at the bottom over the entire length in the width direction of the floor mine lower hopper at the front lower portion of one side wall of the floor mine lower hopper. A grizzly type classification device is provided at the upper end of the floor pit, and a partition plate is provided in the floor mine lower hopper inside the floor mine lower hopper so that a sintered pallet is placed inside the floor mine lower hopper. This is a floor-laying ore charging device for a dwytroid type sintering machine, in which a space divided into two in the traveling direction is provided.

  The embodiment is shown in FIGS. 5 and 7, 21 is a floor laying charging device, 22 is a floor mine upper hopper, 23 is a floor mine lower hopper, 24 is a cutting gate, 25 is a shutter, 26, 26 a and 26 b are floor mine. An opening at the bottom of the lower hopper, 32 is a grizzly classifier, 33 is a partition plate, 34a is a front space, and 34b is a rear space.

JP-A-4-66624 Japanese Patent Laid-Open No. 3-50493 JP 2009-30853 A JP 2011-179032 A

  However, since the wear usually proceeds on the great (grid) surface of the sintered pallet, the slit-shaped gap expands with the passage of time, so that the above-mentioned maximum particle size of the flooring ore currently used is larger than the above. A state in which the slit-shaped gap on the great (lattice) surface is larger has occurred.

  For this reason, even if it had the technique of patent document 4, it turned out that there exists a limit in the basic unit reduction of a flooring ore.

  The present invention has been made in view of the circumstances as described above, and when a sintered ore is produced using a dweroid-type sintering machine, the sintered ore is charged at a relatively low cost. The top surface of the flooring ore can be smoothed horizontally in the width direction of the sintering pallet, and even if the slit-like gaps on the Great (lattice) surface of the sintering pallet expand over time, An object of the present invention is to provide a flooring ore charging apparatus and a method of manufacturing a sintered ore of a dweytroid type sintering machine that can prevent falling and reduce the unit of flooring ore.

  In order to solve the above problems, the following features of the present invention are provided.

[1] An apparatus having a hopper and a shutter for charging a flooring ore into a sintering pallet of a dwytroid type sintering machine, wherein the flooring ore hopper is cut out at the bottom and provided with a gate A flooring ore installation comprising an upper hopper and a flooring ore lower hopper that is installed below the flooring ore upper hopper and receives the flooring ore discharged from the flooring ore upper hopper and having an open bottom. In addition to providing the input device body,
A hopper for charging a sintered ore having a particle diameter larger than that of the flooring ore is installed on the upstream side of the main body of the flooring ore charging device with respect to the traveling direction of the sintering pallet, When the hopper is installed, the lower part, which is the side wall of the surface corresponding to the traveling direction of the sintering pallet, is approximately the same as the width of the sintering pallet. A sintered ore discharge port divided into a plurality of equal parts in the width direction of the pallet is installed, and an equal number of shutters that can move up and down on the front surface of the discharge port and are flat at the bottom are installed on the shutter. Install the same number of shutter open / close cylinders that move this up and down as the shutter, and further to the upstream side of the sintering pallet traveling direction, the gap of the sintering pallet in the width direction of the sintering pallet Can measure quantity In addition, the degree of opening of the sintered ore discharge port formed between the discharge port of the sintered ore hopper and the shutter by moving the shutter up and down according to the signal of the clearance detection sensor. It is comprised so that it may adjust, The floor-laying ore loading apparatus of a dweroid type sintering machine characterized by the above-mentioned.

  [2] Using the floor-laying ore charging apparatus according to [1], when there is a portion where the gap amount of the sintered pallet is larger than a reference gap amount measured by the gap detection sensor, A method for producing a sintered ore, comprising producing a sintered ore by charging the sintered ore from a discharge port of the sintered ore hopper into a portion where the gap amount is large.

  According to the present invention, at a relatively low cost, the upper surface of the floor laying ore charged in the sintering pallet of the dweroid-type sintering machine can be smoothed horizontally in the width direction of the sintering pallet and sintered. Even when the slit-like gap on the pallet's great surface expands over time, the floor spilling from the slit-like gap on the pallet's great surface can be reduced.

  As a result, the floor unit is reduced, the variation in the firing temperature in the width direction of the sintering pallet is reduced, the firing of the sintered cake is made uniform, the return unit is reduced, and the sintered ore is reduced. Yield is also improved.

Schematic of a Dwightroid type sintering machine. A conventional raw material supply apparatus (Patent Document 1). The top view of a floor covering raw material laying apparatus (patent document 2). The front view of the pallet width direction of a floor covering raw material laying apparatus (patent document 2). The perspective view of the pallet width direction of a floor covering raw material laying apparatus (patent documents 3 and 4). The side view which shows a floor covering ore charging device (patent document 3). The side view which shows a floor covering ore charging apparatus (patent document 4). 1 is a schematic view (perspective view) showing an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic (side view) which shows one Embodiment of this invention. 1 is a schematic view (perspective view) showing an embodiment of the present invention. 1 is a schematic view (perspective view) showing an embodiment of the present invention. Display example (transition diagram) of the clearance measurement value measured by the clearance sensor. Schematic diagram (perspective view) showing a state in which a sintered ore is charged at a location where the measured clearance is larger than the reference clearance. 1 is a schematic view (cross-sectional view) of a state in which a slit-shaped gap on a great surface of a sintered pallet is closed according to an embodiment of the present invention. Schematic (cross-sectional view) of how flooring ore falls from slit-shaped gaps on the great surface of a sintered pallet in the prior art. The figure which shows the operation result obtained by Example 1 of this invention.

  The apparatus for charging bedding ore into the sintering pallet of the Dwytroid type sintering machine of the present invention has, as a basic structure, a bedding hopper and a shutter, and the bedding hopper is at the lower part. A floor mine upper hopper with a cut-out gate and a floor mine lower hopper that is installed below the floor mine upper hopper and receives the floor mine discharged from the floor mine upper hopper and has an open bottom. It is made up of.

  The width of the lower part of the floor mine lower hopper is almost the same as the width of the sintered pallet, and when installed, the lower part becomes the side wall of the surface corresponding to the traveling direction of the sintered pallet, and the lower part is almost the same width as the sintered pallet. A shutter that can move up and down and has a flat bottom may be provided at the lower front portion of one side wall of a certain floor mine lower hopper over the entire length in the width direction of the floor mine lower hopper.

  When the flooring ore charging device is installed on the sintering machine by the vertical movement of the shutter, the flooring ore discharge port formed between the lower end of the flooring ore lower hopper and the sintering pallet surface The opening can be adjusted.

  In addition, a grizzly classifier is installed at the upper end of the floor mine lower hopper, which is the lower part of the gate between the floor mine upper hopper and the floor mine lower hopper. By providing a partition plate over the entire width of the floor mine lower hopper, a space divided into two in the traveling direction of the sintering pallet may be provided inside the floor mine lower hopper.

  The flooring ore discharged from the upper hopper of the flooring mine is classified by a grizzly type classifier, but a partition plate for dividing into two in the traveling direction of the sintered pallet inside the flooring ore lower hopper, By providing the entire length from the upper end to the lower end of the lower hopper, the fine particles classified by the grizzly-type classifier pass through the gaps in the grizzly and are divided into two parts by the partition plate. The pallet is loaded into the front space in the direction of travel of the pallet. On the other hand, the coarse particles classified by the grizzly type classifier roll down on the top surface of the grizzly, and enter the space behind the floor mine lower hopper divided into two by the partition plate (rearward in the direction of travel of the sintering pallet). be introduced. The coarse particles and fine particles separated in this way are discharged as floor covering ore from the outlet at the lower end of the floor covering ore lower hopper, but the coarse particles are first charged on the great surface of the sintered pallet, Subsequently, the fine particles of the bedding ore are introduced onto the coarse particles previously charged.

  In addition, in the present invention, in addition to the floor laying charging device (flooring laying charging device main body) having the above-described basic configuration, the front portion (sintering) of the floor laying charging device main body. A portal frame is installed on the front side in the direction of travel of the pallet so as to straddle the sintering pallet at a position away from both side surfaces of the sintering pallet and not in contact with the moving sintering pallet.

  A plurality of gap sensors for continuously measuring slit-shaped gaps on the grate (lattice) surface of the sintered pallet are arranged on the gate-shaped frame at equal intervals in the width direction of the sintered pallet. And a processing unit for processing the measurement signal are connected by a signal cable, and an electric signal is transmitted from the clearance sensor to the processing unit.

  The measured value of the slit-shaped gap on the grate (lattice) surface of the sintered pallet measured by the gap sensor, which is transmitted and input by the calculation processor, is compared with the gap reference value input in advance to the calculation processor. When the gap measurement value is larger than the gap reference value, the gap sensor value of the gap measurement value corresponding to the gap measurement value is output from the arithmetic processing unit.

  On the other hand, the front portion (front side in the direction of travel of the sintering pallet) of the floor covering ore charging apparatus main body is charged with sintered ore having a particle size larger than that of the floor covering ore. Install the ore hopper. In addition, the particle size of the sintered ore charged into the sintered ore hopper is larger than the size in which the slit-like gaps on the great (lattice) surface of the sintered pallet are enlarged due to secular change.

  When the sintered ore hopper is installed, the lower part serving as the side wall of the surface corresponding to the traveling direction of the sintered pallet has a width slightly smaller than the width of the sintered pallet, and the front surface of one side wall of the sintered ore hopper In the lower part, a plurality of sintered ore outlets divided equally in the width direction of the sintering pallet are installed.

  On the front surface of the discharge port, a shutter that can move up and down and has a flat bottom is provided in the same number as the discharge port. The shutter is provided with the same number of shutter opening / closing cylinders as the shutter.

  By moving the shutter up and down, the opening degree of the sintered ore discharge port formed between the discharge port of the sintered ore hopper and the shutter is adjusted.

  The slit-shaped gap measurement value of the sintered (pallet) surface of the sintered pallet measured by the gap sensor is compared with the gap reference value input in advance to the processor, and the gap measurement value is larger than the gap reference value. If the gap measurement value corresponding to this is measured and the machine number of the clearance sensor is output from the arithmetic processing unit, the shutter that moves the shutter corresponding to the output signal is output. The operation signal of the open / close cylinder.

  Thereby, the shutter connected to the driving device moves up and down, and the opening of the sintered ore discharge port formed between the discharge port of the sintered ore hopper and the shutter is adjusted, The sintered ore in the sintered ore hopper is discharged from the discharge port onto the great surface of the sintered pallet.

  The discharged sinter is subjected to a comparison calculation of the slit-like gap measurement value of the grate (lattice) surface of the sintered pallet measured by the gap sensor with a gap reference value input in advance to the processor. By closing the slit-shaped gap on the grate (lattice) surface of the sintered pallet, where the measured value is determined to be larger than the gap reference value, the gap is smaller than the floor mine.

  As described above, the sintered ore is discharged onto the grate surface of the sintered pallet and the slit-like gap on the grate (lattice) surface of the sintered pallet is closed, so that the gap is smaller than the floor mine. Sintering is carried out by charging the flooring ore with the main body of the flooring ore charging device (the flooring ore charging device as described in Patent Document 4) on the great surface of the sintered pallet that has become The mechanism is to prevent the fall of fine-grained flooring ore from the slit-like excessive gaps on the pallet's great (lattice) surface.

  Hereinafter, a floor covering ore charging apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 8 is one embodiment of the present invention, and when the flooring ore charging device is installed on the sintering pallet, the front part of the flooring ore charging device (in the direction of travel of the sintering pallet). It is the schematic of the perspective view seen from the front side. FIG. 9 is a partial side view showing a state in which the floor-laying ore charging apparatus is installed in the dwaritroid type sintering machine 1.

  The flooring ore charging device is installed to supply the flooring ore 30 to a plurality of sintering pallets 2 traveling on an endless track of a dwytroid type sintering machine 1. As shown in FIG. 1, the sintering machine 1 is charged with a sintering pallet 2 that travels on an endless track, and a floor mine hopper 5 that charges the sintering pallet 2 with a floor mine 30. A sintering raw material hopper 6 for charging a sintering raw material 31 is provided on the floor covering ore 30.

  In the floor laying and charging apparatus in this embodiment, the floor laying and charging apparatus main body 21 is the same as that shown in FIGS. 5 and 7, and the floor mine upper hopper 22 and the floor mine lower hopper. 23, and a cut-out gate 24 is provided at the lower part of the floor mine upper hopper 22. Below the floor mine upper hopper 22, there is installed a floor mine lower hopper 23 that receives the floor mine discharged from the floor mine upper hopper 22 and whose upper surface is entirely open. The width of the floor mine lower hopper 23 (the width in the width direction of the sintered pallet 2 perpendicular to the direction of travel of the sintering pallet 2 indicated by an arrow in FIG. 7) is the width of the floor mine upper hopper 22 (fired). The width dimension is larger than the width in the width direction of the pallet 2. In FIG. 8, the lower surface of the floor mine lower hopper 23 is opened, and the shutter 25 (movable up and down) can be moved to the lower portion of the side wall of the floor mine lower hopper 23 facing the traveling direction of the sintering pallet 2. A leveling gate plate (not shown in FIG. 8) is provided.

  In addition, in this embodiment, it is additionally provided in the above-mentioned floor-laying ore charging apparatus main body 21 and adjacent to the front portion of the floor-laying ore lower hopper 23 (front side in the traveling direction of the sintering pallet). And the sintered ore hopper 35 is installed. The sintered ore hopper 35 is formed in an open state on the entire upper surface.

  A position adjacent to the front portion of the sinter hopper 35 (front side in the direction of travel of the sintering pallet 2) and away from both sides of the sintering pallet 2 so as not to contact the moving sintering pallet 2 Then, a clearance sensor mounting base 41 having a gate shape is installed so as to straddle the sintering pallet 2.

  The clearance sensor mounting base 41 includes a plurality of clearance sensors 42 a to 42 j that continuously measure slit-shaped gaps on the great (lattice) surface 10 of the sintering pallet 2 at equal intervals in the width direction of the sintering pallet 2. The clearance sensors 42a to 42j are arranged on a base, and an arithmetic processor for processing this measurement signal is connected by a sensor cable (not shown), and an electric signal is sent from the clearance sensor to an arithmetic processor (not shown). ).

  The measured clearance value of the slit-like surface of the grate (lattice) surface 10 of the sintered pallet 2 measured by the clearance sensors 42a to 42j, which is transmitted and input in the arithmetic processor, is a gap reference value that is input in advance to the arithmetic processor. When the gap measurement value is larger than the gap reference value, the machine numbers of the gap sensors 42a to 42j that measure the gap measurement value corresponding to the gap measurement value are output from the calculation processor. Is.

  Here, as shown in FIG. 10, the sintered ore hopper 35 is charged with a sintered ore having a particle diameter larger than that of the bed deposit, and when the sintered ore hopper 35 is installed. In addition, the lower part of the side surface corresponding to the traveling direction of the sintered pallet 2 has a width slightly smaller than the width of the sintered pallet 2, and the lower part of the front surface of one side wall of the sintered ore hopper 35 has a sintered pallet. Partition plates 38a to 38i are provided at positions equally divided in two width directions, and sintered ore discharge ports 37a to 37j are provided.

  Further, as shown in FIG. 11, shutters 39 a to 39 j that can move up and down and are flat at the lower part are installed on the front surfaces of the discharge ports 37 a to 37 j, and the shutters 39 a to 39 j are installed in the same number as the discharge ports 37 a to 37 j. The same number of shutter opening / closing cylinders 40a to 40j as moving up and down is installed in 39j, and the discharge ports 37a to 37j of the sintered ore hopper 35 are moved by moving the shutters 39a to 39j up and down. And the opening degree of the discharge openings 37a to 37j of the sintered ore formed between the shutters 39a to 39j.

  Shown in FIG. 12 is an example of a result obtained by performing arithmetic processing on the slit-shaped gap measurement value of the grate (lattice) surface 10 of the sintered pallet 2 measured by the gap sensors 42a to 42j, The horizontal axis represents the elapsed time, and the vertical axis represents the measured values of the clearance sensors 42a to 42j.

  In this measurement example, the gap measurement value of the gap sensors 42b and 42g is compared with the gap reference value input in advance to the arithmetic processing unit, and the gap measurement value is larger than the gap reference value. .

  FIG. 13 shows that the arithmetic processing unit that has detected the state is configured to output the machine numbers of the clearance sensors 42b and 42g, so that the signal is received by the shutter opening and closing cylinders 40b and 40g. By controlling the shutters 39b and 39g to open, the sintered ore 36 in the sintered ore hopper 35 is disposed in the lower portion of the sintered ore hopper 35 and discharged from the discharge ports 37b and 37g. This is a state in which the measured value of the gap between the gap sensors 42b and 42g of the slit-like gap of the great (lattice) surface 10 is larger than the gap reference value.

  As a result, in the slit-like gap of the great (lattice) surface 10 of the sintered pallet 2, the sintered ore 36 removes the gap when the gap measurement value of the gap sensors 42 b and 42 g is larger than the gap reference value. It can be occluded.

  By using the floor laying and charging apparatus according to the embodiment of the present invention thus configured, among the slit-like gaps of the great (lattice) surface 10 of the sintered pallet 2, the gaps between the gap sensors 42b and 42g. In a place where the measured value is larger than the gap reference value, the sintered ore 36 closes the gap, and from the floor-laying ore charging apparatus main body installed at the rear portion with respect to the traveling direction of the sintering pallet 2. The floor laying ore charged in the great surface 10 of the sintered pallet 2 is prevented from falling downward from the gap in the great surface 10 of the sintered pallet 2.

  FIG. 14 shows the state of the bedding ore in the sintering pallet when the bedding ore is charged into the sintering pallet using the bedding ore charging apparatus shown in FIGS. Sectional drawing in the direction (width direction of a sintering pallet) perpendicular | vertical to the advancing direction of this is shown.

  As shown in FIG. 14, in the width direction of the sintering pallet, the measured gap values of the gap sensors 42b and 42g in the slit-like gap of the grate (lattice) surface 10 of the sintered pallet 2 are larger than the gap reference value. In such a place, the sintered ore 36 closes the gap, and the flooring ore charged in the upper layer does not fall downward from the gap of the great surface 10 of the sintered pallet 2 and the flooring ore is not dropped. The layer thickness of the 30 layers is uniform and smooth, and the charging and filling density can be made uniform, so that the sintered raw material charged thereabove can be charged uniformly. Reference numeral 31 denotes a sintering raw material charged on the floor covering ore 30. As a result, the air permeability of the flooring ore 30 and the sintering raw material 31 as a whole on the great surface 10 of the sintering pallet becomes uniform, so that the sintering ore can be uniformly fired. As a result, the unit of return ore is reduced.

  On the other hand, when using a conventional bedding ore charging device (for example, the device shown in FIG. 2), the discharge amount from the bedding hopper is adjusted by opening and closing the gate 9, and the discharged raw material is Since it flows down the dropping chute 7 and is loaded onto the sintered pallet, as shown in FIG. 15, irregularities are generated on the surface of the 30 layers of the flooring ore. If the unevenness is leveled with a scraper or the like, a raised portion is formed on the side wall portion of the sintering pallet. When the sintering raw material is charged on the flooring ore, the air permeability of the flooring ore 30 and the sintering raw material 31 as a whole varies in the position in the width direction, and therefore it is difficult to uniformly fire the sintering ore. It is.

  (Example of the present invention) In a dwy-toroid type sintering machine, a floor is formed in the front part (front side in the direction of travel of the sintering pallet) of the floor-laying ore charging apparatus main body, similar to the apparatus shown in FIGS. A sinter ore hopper charged with sintered ore with a grain size larger than that of the spread ore is installed, the floor bedding ore is charged into the sintering pallet, and further, the sintering raw material is charged and the sintered ore is charged. Was manufactured. At that time, the discharge port below the sintered ore hopper was divided into 10 in the width direction of the sintered pallet, and 10 clearance sensors were also installed in the width direction of the sintered pallet.

  (Conventional example) For comparison, a drum feeder is installed between the upper hopper of the flooring mine and the lower hopper of the flooring mine, the grizzly type classification device and the partition plate are removed, and the lower end of the shutter is laid on the lower floor of the flooring mine. Sintered ore was manufactured using a flooring ore charging device that was fixed at the same position as the lower end position of the steel and the flooring ore lower hopper functioned only as a chute. In this case, the flooring ore dropped from the lower part of the flooring ore upper hopper onto the sintered pallet via the roll feeder, and was in a state of falling from a height of about 1 m.

  As a result of the operation, the amount of sintered ore (sinter) production and the amount of flooring ore used are calculated every day to calculate the unit of flooring ore unit, and the comparison of the unit of flooring ore unit is shown in FIG. .

  According to FIG. 16, the floor unit of the conventional example is 130 kg / t-sinter, whereas the example of the present invention has the floor unit of 108 kg / t-sinter. It can be seen that the flooring unit can be reduced by using the ore charging equipment.

  As described above, in the present invention, a sintered ore having a particle diameter larger than that of the flooring ore is charged into a slit-like excessive gap on the great (lattice) surface of the sintered pallet, which is caused by a change with time. Thus, it is possible to prevent the fine-grained flooring ore from dropping from the slit-like excessive gaps on the great (lattice) surface of the sintered pallet, so that the flooring ore unit can be reduced.

DESCRIPTION OF SYMBOLS 1 Dwyroid type sintering machine 2 Sintering pallet 3 Ignition device 4 Wind box 5 Hopper for flooring ore 6 Hopper for sintering raw material 7 Drop chute 8 Grizzly type classifier 9 Gate 10 Great surface 11 Rotary feeder 12 Chute 13 Floor covering Raw material laying equipment 14 Side wall 21 Floor laying equipment (flooring equipment body)
22 Flooring mine upper hopper 23 Flooring mine lower hopper 24 Cutting gate 25 Shutter 26 (26a, 26b) Opening at the bottom of the flooring mine lower hopper 27 Liner 28 Sprocket 30 (30a, 30b) Flooring ore 31 Sintering raw material 32 Grizzly type classification device 33 Partition plate 34a Front space 34b Rear space 35 Sinter hopper 36 Sinter ore 37 (37a, 37b, 37c, 37d, 37e, 37f, 37g, 37h, 37i, 37j) Discharge port 38 (38a, 38b, 38c, 38d, 38e, 38f, 38g, 38h, 38i, 38j) Partition plate 39 (39a, 39b, 39c, 38d, 39e, 39f, 39g, 39h, 39i, 39j) Shutter 40 (40a, 40b, 40c, 40d, 40e, 40f, 40 40h, 40i, 40j) Shutter open / close cylinder 41 Clearance sensor mounting base 42 (42a, 42b, 42c, 42d, 42e, 42f, 42g, 42h, 42i, 42j) Clearance sensor 45a Clearance within the standard value of the grating (grid) 45b Clearance greater than the standard value of the grid

Claims (2)

An apparatus having a hopper and a shutter for charging bedding ore into a sintering pallet of a dweroid-type sintering machine, wherein the bedding ore hopper is cut out at the bottom and provided with an upper hopper and The flooring ore charging apparatus main body comprising a flooring ore lower hopper having an open bottom, receiving the flooring ore discharged from the flooring ore upper hopper and installed below the flooring ore upper hopper With
A hopper for charging a sintered ore having a particle diameter larger than that of the flooring ore is installed on the upstream side of the main body of the flooring ore charging device with respect to the traveling direction of the sintering pallet, When the hopper is installed, the lower part, which is the side wall of the surface corresponding to the traveling direction of the sintering pallet, is approximately the same as the width of the sintering pallet. A sintered ore discharge port divided into a plurality of equal parts in the width direction of the pallet is installed, and an equal number of shutters that can move up and down on the front surface of the discharge port and are flat at the bottom are installed on the shutter. Install the same number of shutter open / close cylinders that move this up and down as the shutter, and further to the upstream side of the sintering pallet traveling direction, the gap of the sintering pallet in the width direction of the sintering pallet Can measure quantity In addition, the degree of opening of the sintered ore discharge port formed between the discharge port of the sintered ore hopper and the shutter by moving the shutter up and down according to the signal of the clearance detection sensor. It is comprised so that it may adjust, The floor-laying ore loading apparatus of a dweroid type sintering machine characterized by the above-mentioned.   The sinter hopper is used when there is a portion where the gap amount of the sintered pallet is larger than the reference gap amount measured by the gap detection sensor using the floor-laying ore charging device according to claim 1. A method for producing a sintered ore, characterized in that the sintered ore is charged by charging the sintered ore into a portion where the clearance amount is large from the discharge port.

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