EP2311997A1 - Verfahren und vorrichtung zur ladung von sinterungsrohmaterial - Google Patents

Verfahren und vorrichtung zur ladung von sinterungsrohmaterial Download PDF

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Publication number
EP2311997A1
EP2311997A1 EP09806695A EP09806695A EP2311997A1 EP 2311997 A1 EP2311997 A1 EP 2311997A1 EP 09806695 A EP09806695 A EP 09806695A EP 09806695 A EP09806695 A EP 09806695A EP 2311997 A1 EP2311997 A1 EP 2311997A1
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EP
European Patent Office
Prior art keywords
raw material
brackets
sintered
wire
members
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.)
Withdrawn
Application number
EP09806695A
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English (en)
French (fr)
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EP2311997A4 (de
Inventor
Takeshi Sekiguchi
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JP Steel Plantech Co
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JP Steel Plantech Co
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Publication date
Application filed by JP Steel Plantech Co filed Critical JP Steel Plantech Co
Publication of EP2311997A1 publication Critical patent/EP2311997A1/de
Publication of EP2311997A4 publication Critical patent/EP2311997A4/de
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines
    • 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
    • F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
    • 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

Definitions

  • the present invention relates to a method and an apparatus for charging raw material to be sintered, in the manufacture of steel or iron.
  • raw material to be sintered of not more than about 10 mm is charged from a raw material supply machine through a raw material charging chute into a pallet of an endless moving sintering machine.
  • Solid fuel such as coke powder and slag-forming flux such as lime powder is included within this raw material to be sintered, and after finishing the charging of the raw material, the coke powder included in the surface layer of the raw material is ignited in the ignition furnace, air is sucked by a blower from below the pallet, and while combusting the coke powder within the raw material layer, the iron ore is fired from the top layer towards the bottom layer.
  • it is important to maintain favorable aeration properties with respect to the raw material layer that is deposited in the pallet, and to ensure uniform aeration properties within the plane of the pallet.
  • the structure of a screen-type raw material charging chute is such that a multitude of wires or rods (referred to as “wire-like members” below) are lined up in parallel to each other in the width direction of the pallet on a surface that is slanted downward while leaving a predetermined spacing between them, and these wires are supported by guide members (brackets).
  • the rod spacing of the raw material charging chute that is formed in screen shape is set to be narrower on the upper side and wider towards the lower side.
  • the raw material charging chute is slanted downward in a direction that is opposite to the direction in which the pallet advances forward.
  • the coarsely grained raw material passing through the wider screen gaps on the lower side of the raw material charging chute are deposited in a raw material bottom layer portion in the pallet, whereas the finely grained raw material passing through the narrower screen gaps on the lower side of the raw material charging chute are deposited in a raw material top layer portion in the pallet.
  • the aeration properties of the material to be sintered in the pallet can be controlled favorably.
  • the pallet width is as much as 3 to 5.5 m
  • the support span of the wire-like members is as wide as 4 to 7 m. Therefore, if there are no guiding members (brackets) supporting the wire-like members, then the wire-like members may sag or start to oscillate due to insufficient stiffness, so that they are shifted away from the positions at which they should actually be arranged, and the sorting capabilities will deteriorate. For this reason, the guide members (brackets) supporting the wire-like members are provided sufficiently, in accordance with the pallet width and the diameters of the wires, in such a number that no sagging or shifting of the wire-like members will occur.
  • the apparatus for charging raw material to be sintered having the above-described structure, it is important to maintain the gaps between the wire-like members (the screen gaps) uniform to support the sorting capabilities, but it is hindered by the following two factors .
  • the first factor is the presence of the guide-members (brackets), and the other factor is the adherence of raw material powder to the wire-like members.
  • the following is a detailed discussion of the problems that arise due to these factors, as well as of how these problems are presently solved.
  • the raw material flow occurs in which the charged raw material is divided on both sides of the guide members (brackets), and the deposition amount of the raw material where the guide members (brackets) are arranged is smaller than the amount where there are no guide members (brackets), so that groove-shaped portions are formed at the surface of the deposited raw material. While these groove-shaped portions are being formed, raw material from surrounding areas may flow in there to some extent, but since the falling distance is too small for the raw material to flow in, a deposition layer with low density is formed. Moreover, when the raw material flows in from the surrounding areas, in principle, relatively large particle size raw material is inclined to pile up.
  • the aeration resistance in the raw material layer is smaller than that in the flat portions where no groove-shaped portions are formed. That is to say, there will be variations of the aeration resistance in the pallet width direction in the layer of the raw material to be sintered. When these variations in aeration resistance become large, then the suction of air concentrates in the groove-shaped portions where the aeration resistance is relatively small, and in the period in which these regions form a combustion belt in the raw material layer, the combustion speed of the coke powder becomes large in these groove-shaped portions, whereby insufficient combustion portions may occur in the flat portions, slowing the firing.
  • the problem of the adherence of raw material powder is the problem that raw material powder such as coal powder, coke powder or the like adheres to the wire-like members, so that is becomes difficult to maintain the gaps between the wire-like members.
  • the sorting of the charged raw material cannot be properly performed, and as with the above-described problem due to the presence of the guide members (brackets), the raw material deposition layer cannot be formed appropriately, which leads to a drop in the yield of the sintered ore, a drop in the product quality, and an increase in coke unit consumption, and furthermore brings about a drop in the productivity of the sintered ore.
  • Patent Documents 1 and 2 recognize that groove-shaped portions are formed at the surface of the deposited raw material, and fill them by leveling the groove-shaped portions with a V-shaped or screw-type raking device.
  • the particle size distribution in the filled groove-shaped portions is not the same as that in other regions, and even though the groove-shape disappears, the problem of variations in the aeration resistance is not substantially solved.
  • Patent Document 3 proposes to move scrapers inserted into the bars which constitute the chute, which may have some effect of scraping off the raw material powder adhered to the bars.
  • thick bars having a certain stiffness are used as the wire-like members constituting the chute. Because if the bars were such thin wires, then guide members (brackets) supporting the wires in the chute width direction would be necessary, and if there were guide members (brackets), then the scraper would collide with the guide members (brackets), so that it could not move.
  • Patent Document 3 is based on an assumption that there are no guide members (brackets) in the chute width direction.
  • the technology of Patent Document 3 cannot be applied to chutes formed by wire-like members that are such that there are guide members (brackets) in the chute width direction.
  • there is a limit to the sorting properties and excellent sorting properties cannot be achieved when thick bars or the like are used as the wire-like members constituting the chute.
  • the present invention has been devised in order to solve these problems, and it is an object of the present invention to provide a technology for keeping the spacing between the wire-like members even and maintaining the sorting possibilities when charging raw material to be sintered in a sintering apparatus.
  • Fig. 10 schematically shows the groove-shaped portions formed in the sintering bed.
  • the influence that such groove-shaped portions have on the combustion surface was considered.
  • the groove-shaped portions were conventionally leveled with a screw or a scraper
  • Fig. 11 is a diagram showing the leveled state of the groove-shaped portions.
  • the regions A are portions that are unaffected by the brackets
  • the regions B are regions where the groove-shaped portions that have occurred due to the brackets have been leveled.
  • the particle size distributions in the regions A and the regions B are roughly as shown in Fig.
  • the particle size is coarser in the regions B, where the groove-shaped portions are leveled, than in the regions A which are unaffected by the brackets. Moreover, the density of the regions B is lower than that in the regions A, so that there is higher aeration in the regions B.
  • Fig. 13 schematically shows the state in which the combustion surface of the sintering bed in a given cross section advances from the top to the bottom.
  • Fig. 13 since the combustion speed in the regions B where the grooved-shaped portions have been leveled is higher, its influence is higher and the difference to the regions A that are unaffected by the brackets becomes larger the more the combustion surface advances downward.
  • ⁇ F Near the bottom of the bed, there is a step ⁇ F between the regions A and the regions B.
  • the step ⁇ F in the combustion surface near the bed bottom is proportional to the depth of the regions B where the groove-shaped portions are leveled, that is, to the length in the depth direction of the portions affected by the groove-shaped portions, and in this case it is proportional to the height H of the sintering bed.
  • Fig. 14 is a diagram showing the passage of time of the combustion surface at a given cross section in a sintering bed onto which raw material has been piled while moving the brackets along the wires at a predetermined speed.
  • the regions enclosed by the oblique lines correspond to the regions B, which are affected by the brackets.
  • a' denotes areas that do not pass through the regions B.
  • b' denotes areas that do pass through the regions B but the passage distance within the region gradually increases from 0 to h or gradually degreases from h to 0.
  • c' denotes areas where the distance passing through the regions B is constant, this distance being h.
  • the combustion surface advances at a predetermined speed.
  • the areas b' there is a difference in the speed of the combustion surface between the portions where the distance passing through the regions B is long and the portions where this distance is short. In the portions where this distance is long, the combustion surface advances fast, and in the portions where this distance is short, the combustion surface advances slowly. Therefore, the combustion surface is slanted in the areas b'.
  • the speed is faster by a predetermined speed that is proportional to the distance h passing through the regions B.
  • the maximum length passing through the regions B is h, so that the step to the areas a' that are unaffected by the brackets is proportional to h, namely the step ⁇ F shown in Fig. 14 .
  • Fig. 15 schematically shows the moving speed of the brackets and the range of influence of the brackets as well as the position of the combustion surface near the bottom of the sintering bed.
  • Fig. 15(a) shows the state when the brackets are halted
  • Fig. 15(b) shows the state when the bracket moving speed is slow
  • Fig. 15(c) shows the state when the bracket moving speed is medium
  • Fig. 15(d) shows the state when the bracket moving speed is fast. If the brackets are halted as in Fig. 15(a) , the combustion surface becomes U-shaped near the bottom. If the speed is slow as in Fig.
  • Fig. 16 shows the state, viewed in cross section in the pallet advancing direction, when the raw material is supplied from the drum chute 7 to the pallet 9 and piled onto it.
  • ⁇ p denotes the pile angle of the raw material
  • v p denotes the moving speed of the pallet 9.
  • Fig. 17 is an illustrative diagram to illustrate the relation between the pile speed and the pile angle ⁇ p (Fig. 17(a)), and the relation between the pile speed and the inclination angle ⁇ b of the portion affected by the brackets (Fig. 17(b)).
  • Fig. 17(b) shows a sectional surface of the sintering bed taken at right angles to the direction in which the pallet advances, and in Fig.
  • H denotes the sintering bed height and W b denotes the width of the portion affected by the brackets.
  • V b denotes the bracket moving speed
  • v p denotes the pallet speed
  • ⁇ p denotes the pile angle when the raw material is charged onto the pallet
  • ⁇ b denotes the inclination angle of the portion affected by the brackets
  • W b denotes the width of the portion affected by the brackets
  • H denotes the sintering bed height.
  • the pile speed in the H direction of the raw material is v p tan ⁇ p (see Fig.
  • Equation (3) v b ⁇ W b • v p • tan ⁇ p / H
  • Fig. 18 is an illustrative diagram using these considerations.
  • Fig. 18(a) is a diagram showing a portion affected by the brackets when the brackets are moved back and forth in the pallet width direction, seen in a top view.
  • Fig. 18(b) is a diagram showing a sectional view in the pallet axis direction of the sintering bed corresponding to Fig. 18(a) .
  • B denotes the lowermost pile portion (bottom) of the raw material
  • T denotes the uppermost pile portion (top).
  • Lb denotes the length of the projection portion when the line connecting B and T is projected onto the pallet surface
  • P denotes the movement pitch of the brackets
  • Pt denotes the pitch of the portions affected by the brackets in the direction in which the pallet moves.
  • ⁇ p denotes the pile angle of the raw material
  • ⁇ t denotes the inclination angle with respect to the line at right angles to the pallet moving direction at the point B or the point T.
  • v p denotes the moving speed of the pallet and Vb denotes the moving speed of the brackets.
  • the numbers enclosed by the square denote the number of times a region passes through a portion affected by the brackets, from the top surface to the bottom surface of the sintering bed, when a region associated with that number is viewed in a cross section perpendicular to the pallet moving direction.
  • this region passes once through a portion affected by the brackets from the top surface to the bottom surface of the sintering bed, and corresponds for example to the regions b' and c' in Fig. 14 .
  • the regions marked by the number "0" are unaffected by the brackets, and the regions marked by the number "2" are affected twice as the brackets move back and forth.
  • the fact that there are regions marked by the numbers "0" and "1" in this section means that within the same section, there are portions that are affected by the brackets and portions that are unaffected by the brackets.
  • the influence on the combustion surface is proportional to the length in the depth direction that is affected by the brackets, it results that in the cross section perpendicular to the pallet advancing direction, if the number of times in which there is an influence of the brackets is constant, then it follows logically that the combustion surface near the bottom of the bed must be the same.
  • Equation (8) and Equation (9) it is possible to reduce the influence of the brackets on the combustion surface to a minimum by determining the moving speed of the brackets in accordance with the moving speed of the pallet and the moving pitch of the brackets.
  • the bracket speed is faster than that, then the number of times that areas are affected by the brackets becomes non-uniform again, as shown in Fig. 20 , so that it can be seen that the above-noted condition is a special condition.
  • raw material to be sintered is sorted and charged onto a pallet below, by supplying the raw material to be sintered to a chute in which a plurality of wire-like members are arranged side by side, the raw material to be sintered being supplied to the chute while moving brackets supporting the wire-like members back and forth in an axial direction of the wire-like members.
  • An apparatus for charging raw material to be sintered in accordance with the present invention in which raw material to be sintered is sorted and charged onto a pallet below, by supplying the raw material to be sintered to a chute in which a plurality of wire-like members are arranged side by side, comprises a plurality of brackets supporting the wire-like members, and a bracket moving mechanism that moves the brackets back and forth in an axial direction of the wire-like members.
  • the brackets may have a function of scraping off raw material powder adhering to the wire-like members, when moving the brackets.
  • a supporting portion of the brackets that supports the wire-like members may have both a function of supporting the wire-like members, and a function of scraping off raw material powder or the like adhering to the wire-like members.
  • the distances between the plurality of brackets are set to predetermined distances, and the plurality of brackets are arranged to move while they keep the distances.
  • a movement range of a supporting portion of the brackets that supports the wire-like members may be set to cover an entire width of the chute formed by the wire-like members, when the brackets are moved by the bracket moving mechanism.
  • the bracket moving mechanism may comprise a moving mount that is placed slidably in a width direction of the pallet and to which the brackets are fixed, and a driving device for sliding the moving mount.
  • fixed lateral walls may be provided on both sides of the pallet, the brackets may be arranged to move between the two fixed lateral walls, and a distance over which the brackets can move may be set to at least a spacing between the plurality of brackets.
  • the apparatus according to any of (2) to (8) may further comprise a driving device into which a pallet moving speed is entered, which calculates a bracket moving speed based on this entered value, and which moves the brackets based on the calculated value.
  • the wire-like members may be covered with a non-metallic organic substance.
  • the moving speed of the brackets may be set to 0.6 m/min or faster.
  • the raw material to be sintered is supplied to the chute while moving the brackets supporting the wire-like members in the axial direction of the wire-like members, so that no groove-shaped portions are formed at the surface of the deposited raw material, adherence of raw material powder and the like to the wire-like members can be prevented, the gaps between the wire-like members can be kept uniform and the sorting capabilities of the wire-like members can be maintained.
  • Fig. 1 is an illustrative diagram of the main parts of an apparatus for charging raw material to be sintered in accordance with an embodiment of the present invention.
  • This apparatus 1 for charging raw material to be sintered in accordance with the present embodiment sorts raw material to be sintered by supplying the raw material to be sintered from a drum chute 7 to a wire chute 5 made of a plurality of wires 3 arranged side by side in parallel, and charging it to a pallet 9 below.
  • the apparatus 1 includes a moving support mechanism 13 that moves in a pallet width direction while intermediately supporting wires 3 that are spanned between fixed lateral walls 11 erected on both sides of the pallet 9. The following is a detailed explanation of the configuration of the moving support mechanism 13, which is a feature of the present invention.
  • the moving support mechanism 13 includes a rectangular sliding frame 15 that is arranged straddling the top of the pallet 9 in the pallet width direction, three brackets 17, 19 and 21 that are arranged on the sliding frame 15 and support the wires 3, linear movement bearings 23 that abut against the bottom surface of the sliding frame 15 and support the sliding frame 15 such that it is slidable in the pallet width direction, and a hydraulic cylinder 25 that moves the sliding frame 15 in the pallet width direction.
  • a rectangular sliding frame 15 that is arranged straddling the top of the pallet 9 in the pallet width direction
  • three brackets 17, 19 and 21 that are arranged on the sliding frame 15 and support the wires 3
  • linear movement bearings 23 that abut against the bottom surface of the sliding frame 15 and support the sliding frame 15 such that it is slidable in the pallet width direction
  • a hydraulic cylinder 25 that moves the sliding frame 15 in the pallet width direction.
  • the three brackets 17, 19 and 21 are placed on the sliding frame 15, spaced apart by a predetermined spacing.
  • the brackets 17, 19 and 21 include curved portions 17a, 19a and 21a that are sloped in a circularly curved shape, and foot portions 17b, 19b, and 21b for fixing the brackets 17, 19 and 21 to the sliding frame 15.
  • the curved portions 17a, 19a and 21 are provided with a plurality of holes 17c, 19c and 21c through which the wires 3 are inserted.
  • the spacing between the wires widens from the uppers side towards the lower side of the slope of the curved portions 17a, 19a and 21a.
  • the wires 3 arranged between the fixed lateral walls 11 are inserted through the holes 17c, 19c and 21c in the three brackets 17, 19 and 21, and the wires 3 are supported at their two ends by the fixed lateral walls 11 and are furthermore supported in between by the brackets 17, 19 and 21.
  • the functionality is provided that when the brackets 17, 19 and 21 are moved, raw material powder and the like adhering to the wires 3 is scraped off by the edge of the holes 17c, 19c and 21c.
  • the spacing of the three brackets 17, 19 and 21 is set to an appropriate length, such that a force supporting the wires 3 can be applied that is large enough so that the wires 3 do not sag considerably, there are no excessive oscillations due to insufficient stiffness, and the wires 3 do not shift from the position at which they are supposed to be arranged.
  • Such an appropriate length differs depending on the conditions, such as the thickness and the tensile force of the wires 3, so that it is set in accordance with these conditions.
  • brackets 17, 19 and 21 are fixed to the sliding frame 15, so that the distance between the brackets 17, 19 and 21 does not change when the sliding frame 15 is moved, and as a consequence, also the supporting force with which the wires 3 are supported by the brackets 17, 19 and 21 does not change either. However, the distance between the fixed lateral walls 11 and the brackets 17 and 21 placed at the two ends changes when the sliding frame 15 is moved.
  • the wires 3 can be properly supported also in the case that the distance between the fixed lateral walls 11 and the brackets 17 and 21 at the two ends becomes longest, and therefore, the maximum distance between the fixed walls and the brackets 17 and 21 at the two ends, that is, the distance between the fixed lateral wall 11 and the bracket 17 on the one side when the bracket 21 on the other side abuts against the fixed lateral wall 11, is set such within a length range at which the wires 3 can be properly supported.
  • Fig. 2(a) shows the state when the brackets 17, 19 and 21 are moved furthest to the right.
  • Fig. 2(b) shows the state when the brackets 17, 19 and 21 are moved furthest to the left.
  • the distance between the fixed lateral walls 11, that is, the entire width of the wires 3 is L
  • the distance between the leftmost bracket 17 and the fixed lateral wall 11 on the left that is, the movable distance of the brackets 17, 19 and 21
  • the distance between the brackets 17, 19 and 21 is P.
  • a plurality of wires 3 are arranged between the two fixed lateral walls 11.
  • the plurality of wires 3 are set such that when the wires 3 are projected into the horizontal plane, the distance between the wires widens from the obliquely upper side towards the lower side.
  • the circumferential surface of the wires 3 is covered by a non-metallic organic material (for example, by rubber, plastic or the like), so that raw material powder does not adhere easily to the wires 3, and raw material powder can be easily scraped off by the brackets 17, 19 and 21.
  • a non-metallic organic material for example, by rubber, plastic or the like
  • linear movement bearings 23 are placed on fixing mounts 27 that are placed on both sides of the pallets 9, and have the function of allowing smooth movement of the sliding frame 15. It should be noted that the linear movement bearings 23 are merely an example, and it is also possible to use other components, as long as they have the function to allow for smooth movement of the sliding frame 15.
  • the rod of a hydraulic cylinder 25 is coupled to the sliding frame 15, and the sliding frame 15 can be moved by extending and retracting this rod.
  • the speed by which the rod is extended or retracted is controlled to be 0.6 m/min or faster.
  • the brackets 17, 19 and 21 are moved at a speed of 0.6 m/min or faster, so that the presence of the brackets 17, 19 and 21 tends not to exert an adverse influence on the sorting capability of the wire chute 5 when supplying the raw material to be sintered.
  • the hydraulic cylinder 25 controls the extending/contracting operation of its rod with a control device 29 as shown in Fig. 3 .
  • the control device 29 receives the bracket movement pitch P, the pallet speed vp and the raw material pile length Lb as input, and based on these parameters, calculates the bracket moving speed v b with the following Equation (9), and gives out the calculated bracket moving speed v b as an instruction.
  • v b 2 ⁇ P • v p / L b It is also possible that the control device 29 receives the bracket movement pitch P, the pallet speed v p , the raw material charging portion pile angle ⁇ b and the sintering bed height H as input, and based on these parameters, calculates the bracket moving speed v b with the following Equation (8), and gives out the calculated bracket moving speed v b as an instruction.
  • v b 2 ⁇ P • v p • tan ⁇ p / H
  • v p 2m/min
  • ⁇ p 40°
  • H 600 mm
  • v b 6.7 m/min is attained.
  • v p is available in real-time as the pallet speed of the sintering machine, and this signal may be used.
  • a similarly available signal may be utilized.
  • a level sensor detecting the height of the sintering bed may be provided and the signal from this level sensor may be utilized.
  • the pile length Lb and the pile angle ⁇ p may be determined by a level sensor or by image processing, and the resulting signals may be utilized. Needless to say, these values hardly change at all, so that once they have been measured, these values may also be manually entered. This is also the same for the height H of the sintering bed.
  • the pallet 9 moves in the opposite direction to the direction in which the raw material slides and falls down when viewed in a top view. Moreover, by driving the hydraulic cylinder 25, the sliding frame 15 is moved back and forth at constant speed in the pallet width direction.
  • the supplied raw material to be sintered slides and falls down the oblique surface of the wire chute 5.
  • the gaps between the wires 3 forming the oblique surface of the wire chute 5 widen from the upper portion to the lower portion of the oblique surface, so that in the process of sliding and falling down the oblique surface of the wire chute 5, the raw material is charged from the gaps between the wires 3 onto the pallet 9 starting with the raw material of finer particle size and then gradually with the raw material of coarser particle size.
  • the pallet 9 moves in the opposite direction to the direction in which the raw material to be sintered is supplied, so that first the raw material of coarser particle size is deposited onto the pallet 9, and the raw material of finer particle size is deposited on top of that, so that a raw material layer is formed that is segregated by particle size in the depth direction.
  • brackets 17, 19 and 21 are moved at a predetermined speed in the pallet width direction. Consequently, the brackets 17, 19 and 21 supporting the wires 3 are not stopped at a constant location, but constantly change their positions. For this reason, groove-shaped portions, which were a problem in the conventional technology, are not formed in the surface layer portion of the deposited raw material. Moreover, by moving the brackets 17, 19 and 21, raw material powder and the like adhering to the wires 3 is consistently scraped off by the brackets 17, 19 and 21, and the gaps between the wires 3 are held at a predetermined distance, so that the raw material is consistently sorted in a favorable manner.
  • a deposition layer of raw material can be formed that has a suitable segregation by particle size, without forming groove-shaped portions in the surface layer portion of the deposited raw material caused by the presence of the brackets 17, 19 and 21, which used to be a problem in the conventional technology.
  • groove-shaped portions that have arisen are not leveled, as in the technology of the prior art documents 1 and 2, but such groove-shaped portions are not formed to begin with, so that also the problem that the particle size distribution of the groove-shaped portions differs from that at other locations when the arising groove-shaped portions are leveled does not occur.
  • the raw material powder and the like adhering to the wires 3 is constantly scraped off by the brackets 17, 19 and 21, and the gap between the wires 3 is kept at a predetermined gaps, so that raw material powder adhering to the wires 3 does not cause any adverse effects.
  • brackets Even though there is support by the brackets, the presence of the brackets does not exert any adverse influence on the sorting capabilities, so that it is possible to make the wires 3 as small as possible while increasing the number of brackets, and more suitable sorting can be realized.
  • the moving support mechanism 13 is formed by a simple mechanism in which the brackets 17, 19 and 21 are fixed to the sliding frame 15, and the sliding frame 15 is moved back and forth, so that the effect is attained that maintenance becomes easy and there are few malfunctions, even in an adverse environment with a large amount of dust, namely the environment in which the raw material to be sintered is supplied.
  • the speed VB of the air flowing along the regions B which are the regions that are affected by the brackets, would be larger than the speed VA of the air flowing in the regions that are unaffected by the brackets, that is, VB > VA, which would reduce the effect of the present invention.
  • the flow path length Z A in the case of the flow pattern A is longer than the flow path length Z B in the case of the flow pattern B, and it is clear that the flow pattern B is attained, in which the flow path length is short and the pressure loss is small, so that the effect of the present invention as described can be sufficiently attained.
  • Z A is several times larger than Z B .
  • the flow path length Z A in case of the flow pattern A and the flow path length Z B in case of the flow pattern B are given as follows:
  • brackets there is no limitation to fixing the brackets to the sliding frame 15, as a way to hold the brackets, and it is also possible that for example the upper and lower ends of the brackets are fixed to separate wires or rods that are arranged parallel to the wires 3 above and below the wires 3 constituting the wire chute 5, and these wires or rods are moved in the pallet width direction.
  • brackets 17, 19 and 21 are fixed to the sliding frame 15, and the three brackets 17, 19 and 21 are moved unitarily, but the moving support mechanism 13 is not limited to this structure, and a structure, in which the brackets 17, 19 and 21 are driven individually, is also possible.
  • the number of brackets is not limited to this, but can be set as appropriate in view of such factors as the chute width, such that the condition is satisfied that "the movable distance S of the brackets is at least the distance P between the brackets 17, 19 and 21.”
  • holes 17c, 19c and 21c are provided in the brackets 17, 19 and 21, which have both the function of supporting the wires 3 with the rims of the holes 17c, 19c and 21c and the function of scraping off raw material and the like adhering to the wires 3.
  • wires 3 are provided as the wire-like members constituting the wire chute 5.
  • the wire-like members of the present invention may also be rods instead of wires.
  • FIG. 7 is a drawing showing another form of a means for driving the sliding frame 15.
  • Fig. 7(a) is a perspective view
  • Fig. 7(b) is a diagram, in which the moving support mechanism 13 has been added to the sectional view taken in longitudinal direction of Fig. 7(a) .
  • a rack / pinion mechanism in which a rack 35 is provided on the side of the sliding frame 15, and a pinion gear 37 rotated by a motor meshes with the rack 35.
  • a structure with a winch 43 having a structure in which ends of a wire 41 are fixed to two locations in the sliding direction of the sliding frame 15, and the wire 41 can be wound up and unwound with a wire drum 39 that is placed on the rotation axis of a motor 38, as shown in Fig. 8 .
  • a structure is also possible, in which a pair of screw shafts 45 arranged in parallel are rotated by a motor 47, support portions 49 supporting the brackets 17, 19 and 21 are inserted onto the screw shafts, and the brackets 17, 19 and 21 are moved in the screw shaft direction by the rotation of the screw shafts 45, without using the sliding frame 15, as shown in Fig. 9 , although this solution is inferior with regard to durability and simplicity, compared to the solution with the slide frame.
  • an accordion-like cover is provided at the portion of the screw.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP09806695.4A 2008-08-13 2009-08-10 Verfahren und vorrichtung zur ladung von sinterungsrohmaterial Withdrawn EP2311997A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008208375A JP2010043328A (ja) 2008-08-13 2008-08-13 焼結原料装入方法及び装置
PCT/JP2009/064102 WO2010018804A1 (ja) 2008-08-13 2009-08-10 焼結原料装入方法及び装置

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EP2311997A1 true EP2311997A1 (de) 2011-04-20
EP2311997A4 EP2311997A4 (de) 2014-09-03

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JP (1) JP2010043328A (de)
KR (1) KR101295564B1 (de)
CN (1) CN102027143B (de)
WO (1) WO2010018804A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3489371A1 (de) * 2017-11-24 2019-05-29 Tata Steel IJmuiden B.V. Abstreifervorrichtung

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Publication number Priority date Publication date Assignee Title
KR101242707B1 (ko) * 2011-03-10 2013-03-18 주식회사 포스코 소결기 대차의 배합원료 통기장치
JP2015183287A (ja) * 2014-03-26 2015-10-22 新日鐵住金株式会社 焼結鉱の製造方法

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JPS60155894U (ja) * 1984-03-22 1985-10-17 新日本製鐵株式会社 焼結原料の装入装置
JPS6160843A (ja) 1984-08-31 1986-03-28 Ishifuku Kinzoku Kogyo Kk 歯科陶材焼付用パラジウム合金
JPS63180079A (ja) 1987-01-20 1988-07-25 株式会社神戸製鋼所 火格子への焼結原料装入装置
JPH0343600Y2 (de) * 1987-04-11 1991-09-12
JP3446000B2 (ja) 1996-04-16 2003-09-16 Ｊｆｅスチール株式会社 焼結機の原料装入装置
JP3889142B2 (ja) 1998-01-20 2007-03-07 Ｊｆｅスチール株式会社 焼結機幅方向の原料通気性均一化装置および焼結鉱の製造方法
KR100544434B1 (ko) * 2001-06-05 2006-01-24 주식회사 포스코 소결원료장입장치
KR20030039795A (ko) * 2001-11-14 2003-05-22 주식회사 포스코 소결 통기성 향상을 위한 통기관 부착광 제거장치

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No further relevant documents disclosed *
See also references of WO2010018804A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3489371A1 (de) * 2017-11-24 2019-05-29 Tata Steel IJmuiden B.V. Abstreifervorrichtung

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WO2010018804A1 (ja) 2010-02-18
KR20100122956A (ko) 2010-11-23
JP2010043328A (ja) 2010-02-25
CN102027143B (zh) 2013-03-13
EP2311997A4 (de) 2014-09-03
CN102027143A (zh) 2011-04-20
KR101295564B1 (ko) 2013-08-12

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