JP5505292B2 - Batch type sintering apparatus and batch type sintering method - Google Patents

Description

  The present invention relates to a batch-type sintering apparatus and a batch-type sintering method for producing sintered ore, which is a raw material for a blast furnace in an iron making process, and in particular, can improve product yield and productivity during sintering. The present invention relates to a possible batch-type sintering apparatus and batch-type sintering method.

  Conventionally, as a method for producing sintered ore which is a raw material for a blast furnace in an iron making process, in addition to a continuous DL type (Dlight Lloyd) used in mass production, a POT (pot) type, a GW (Greenawalt) type, There is a batch method using a small sintering apparatus. When sintering by such a method, as raw materials for sintering, iron ore (pulverized ore) as a main raw material, limestone and coke as auxiliary materials, and, if necessary, serpentine, return ore A blended raw material including (a powdery sintered ore with a product diameter that cannot be used as a raw material for a blast furnace) is used.

  When sintering is performed by the above continuous method, first, each component of the sintering raw material is added and mixed to prepare a blended raw material. And after putting this compounding raw material into a hopper and further cutting it out, charging it into a sintering pallet, igniting the powdery coke contained in the compounding raw material and sucking air downward, the coke is burned The blended raw material is heated, partially melted and baked to produce a sintered ore. In a sintering apparatus employing such a lower suction type, air is sucked from above the pallet and vented downward, and the combustion heat of the coke is transferred from the upper layer side to the lower layer side, so that sintering proceeds. The sintered cake obtained in such a process is crushed and sized, whereby a sintered ore having an average particle size of about 20 mm is produced. Of these, the sintering process is an extremely short process in which heating and cooling are performed in a few minutes, but it greatly affects the yield and productivity during the production of the sintered ore and the quality of the obtained sintered ore.

In the sintering method according to the general procedure as described above, the combustion zone in the blended raw material charged on the pallet has the property of propagating from the upper layer side to the lower layer side, and the heat of the upper layer is also used in the lower layer There is a problem that heat is insufficient in the upper layer and heat is excessive in the lower layer.
In the continuous DL type sintering machine, when the blended raw material is charged into the sintering machine pallet, the particle size segregation occurs in the upper and lower layers by rolling on the slope where the raw material particles are already charged and rested. At this time, since the particle size of the coke, which is a coagulant, is smaller than that of fine ore, etc., the concentration of coagulant (coke) on the upper layer side naturally increases. Excessive heat and the like are suppressed. Furthermore, various improvements have been attempted in the raw material charging apparatus for the purpose of strengthening segregation in the upper and lower layers of such a blended raw material (see, for example, Non-Patent Document 1).

  However, in the case of a method using a batch-type sintering apparatus such as a POT type, since a method in which raw materials are directly input is usually employed, coke segregation in the upper and lower layers as described above cannot be performed. For this reason, the thermal efficiency at the time of sintering falls, a yield falls, and the problem that productivity deteriorates arises. Furthermore, when a batch-type sintering apparatus is used as a test apparatus and a reproduction test of a continuous DL-type sintering apparatus that is frequently used as an actual machine in a steelworks or the like is performed, the filling state of the blended raw materials is reproduced. Cannot be performed, and a problem occurs in the function as a hard simulator.

  Here, for example, in charging and filling the blended raw materials, a method of applying particle size segregation by substantially dividing the packed bed by sequentially filling raw materials with different particle sizes prepared in advance has been attempted. (For example, refer nonpatent literature 2). However, when segregation is imparted to the packed layer of the blended raw material by such a method, since there is a boundary surface between each layer, it is different from the actual continuous segregation, so there is a problem in the function as a hard simulator. In addition to being there, there is a problem that work is troublesome.

  In addition, in a GW-type compact sintering apparatus, a method of supplying a raw material from a raw material charging vehicle toward a sintering hopper has been implemented (see, for example, Non-Patent Document 3). However, even in this method, the raw material is supplied directly to the sintering machine pallet, and preferable segregation of coke does not occur. Accordingly, there is a problem in that heat efficiency is poor due to insufficient heat on the upper layer side or excessive heat on the lower layer side, resulting in a decrease in yield and productivity.

"Examination of raw material grain size segregation in the sintering machine supply section-Iron and steel-", Japan Iron and Steel Institute, 1985, Vol. 71, No. 16, P1888-1894 "Characteristics of raw material filling in sintering machine in chute charging and its influence on sintering reaction-Iron and steel-" Japan Iron and Steel Institute, 1991, Vol. 77, No. 1, P63-70 Inazumi Tadahiro, “Sintered Ore; Japan's Challenges in Resource Minor Countries: Steel Technology Flows”, Japan Iron and Steel Institute, 2000, 2nd Series, Volume 1, P81-82

  The present invention has been made in view of the above problems, and in particular, a batch capable of improving product yield and productivity during sintering when manufacturing sintered ore which is a raw material for a blast furnace in an iron making process. An object of the present invention is to provide a type sintering apparatus and a batch type sintering method.

When the present inventors diligently researched to solve the above-mentioned problems, when producing a sintered ore using a batch-type sintering apparatus, when charging and filling the compounding raw material into a sintering pan (pallet). It has been found that the segregation of the concentration of the coagulant (coke) in the deposition direction of the blended raw material can be strengthened by adopting a configuration provided with a classifying means whose arrangement position changes according to the particle size. As a result, the coke concentration of the blended raw material filled in the sintering pot can be continuously charged so that the upper layer side becomes thicker while the lower layer side becomes thinner. The present inventors have found that the thermal history of the entire blended raw material is made uniform, the quality difference between the upper and lower layers is reduced, the thermal efficiency is improved, the yield is improved, and the productivity is increased, and the present invention is completed.
That is, the gist of the present invention is as follows.

  [1] A batch-type sintering apparatus for producing sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch manner, and a raw material supply unit for supplying the blended raw material And a classification unit for continuously sieving the blended raw material supplied from the raw material supply unit according to a particle size, and the blended raw material sieved by the classification unit in a dispensing direction according to the particle size A conveyor that is continuously classified and arranged, and a sintering pot that is charged with the continuously classified blended material disposed on the conveyor and sinters the blended material, The classification unit has a fine mesh side disposed at a position corresponding to the upstream side of the conveyor, and a coarse mesh side disposed at a position corresponding to the downstream side, whereby the upstream side of the conveyor As you go downstream from The compounding raw material is arranged so that the particle diameter is continuously increased, and the conveyor rotates in the discharge direction from the downstream side, whereby the compounding material arranged on the conveyor is placed inside the sintering pot. When charging into the compounding raw material, in the deposition direction of the compounding raw material, it imparts particle size segregation so that the particle size of the compounding raw material continuously decreases from the bottom side to the upper side of the sintering pot, Batch type sintering equipment.

  [2] A batch-type sintering apparatus for producing a sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch manner, and a raw material supply unit for supplying the blended raw material And a classification unit for continuously sieving the blended raw material supplied from the raw material supply unit according to a particle size, and the blended raw material sieved by the classification unit in a dispensing direction according to the particle size A first conveyor that is continuously classified and disposed downstream of the first conveyor in the dispensing direction, and the first conveyor rotates in the dispensing direction so that the combination is disposed on the first conveyor. The raw material is dropped and supplied, and the blended raw material is classified according to the particle size and continuously classified in the dispensing direction, and the blending disposed on the second conveyor. Raw materials And a sinter pot for heating and sintering the blended raw material, and the classification part is sieved at a position corresponding to the downstream side of the first conveyor. The fine grain side of the first conveyor is disposed at the position corresponding to the upstream side so that the particle diameter continuously decreases from the upstream side to the downstream side of the first conveyor. And when the first raw material is rotated in the dispensing direction from the downstream side to supply the second raw material arranged on the first conveyor onto the second conveyor, By rotating the second conveyor in the opposite direction to the first conveyor, the blended raw material is arranged so that the particle diameter continuously increases from the upstream side to the downstream side of the second conveyor, and the second conveyor Conveyor delivery direction When the blended raw material arranged on the second conveyor is charged into the sintering pot, the bottom of the sintering pot is shifted from the bottom side to the upper side when the blended raw material is deposited. A batch-type sintering apparatus, characterized in that grain size segregation is imparted so that the grain size of the blended raw material continuously decreases as it goes.

  [3] A batch-type sintering method for producing sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch manner, and a raw material supply step for supplying the blended raw material, The sieving material is continuously sieved according to the particle size and placed on a conveyor, and the classification step is arranged so that the particle size continuously increases from the upstream side to the downstream side of the conveyor, and By rotating the conveyor in the payout direction, the mixed raw materials arranged on the conveyor are segregated so that the particle size continuously decreases from the bottom side to the top side of the sintering pan in the deposition direction. And a charging step of dispersing and charging the inside of the sintering pot while imparting, and a sintering step of sintering the blended raw material charged in the sintering pot to obtain a sintered ore. To Pitch-type sintering method.

  [4] A batch-type sintering method for producing a sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch manner, and a raw material supply step for supplying the blended raw material, Classifying the blended raw materials continuously according to the particle size and arranged on the first conveyor, and arranged so that the particle size continuously decreases from the upstream side to the downstream side of the first conveyor. And by rotating the first conveyor in the payout direction, on the first conveyor, vertically below the first conveyor and on the second conveyor arranged in parallel with the first conveyor. While dropping and supplying the blended raw material, the second conveyor is rotated in the opposite direction to the first conveyor, so that the upstream side of the second conveyor is changed to the downstream side. Arrangement step of arranging the blended raw material so that the particle diameter continuously increases according to this, and rotating the second conveyor in the payout direction, thereby depositing the blended raw material disposed on the second conveyor Filling step of dispersing and charging the inside of the sintering pot while giving a particle size segregation so that the particle size continuously decreases from the bottom side to the upper side of the sintering pot in the direction, And a sintering step of sintering the charged blended raw material to obtain a sintered ore.

  In the present invention, the upstream side on the second conveyor refers to the side that first receives the blended material in the rotation direction of the second conveyor when the blended material is received from the first conveyor. The “downstream side” above refers to the side from which the blended material is first dispensed in the direction of rotation of the second conveyor when the blended material is dispensed.

  According to the batch-type sintering apparatus and the batch-type sintering method of the present invention, with the above-described configuration, when the blended raw material arranged on the conveyor is charged into the sintering pot, the firing of the blended raw material is performed. It can apply | providing, strengthening a particle size segregation so that the particle size of a mixing | blending raw material may become small as it goes to the upper side from the bottom part side of a knotting pan. As a result, the coke concentration of the blended raw material filled in the sintering pot can be continuously charged so that the upper layer side becomes thicker while the lower layer side becomes thinner. The thermal history of the entire blended material is made uniform, the quality difference between the upper and lower layers is reduced, the thermal efficiency is improved, the yield is improved, the productivity is increased, and the amount of coke used as a coagulant is reduced. It becomes possible to do. In addition, when the present invention is applied to a reproduction test of a continuous sintering apparatus, it is possible to accurately reproduce the filling state of the blended raw material, which is a raw material, and the test accuracy as a hard simulator is greatly improved. Therefore, by applying the batch-type sintering apparatus and batch-type sintering method of the present invention in the iron making process of the iron making process, it is possible to fully enjoy the merits such as improvement of hot metal quality and reduction of manufacturing cost, Its social contribution is immeasurable.

It is a figure which illustrates typically the batch type sintering apparatus and batch type sintering method which are one Embodiment of this invention, and is the schematic which shows the whole structure of a batch type sintering apparatus. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which illustrates typically the batch type sintering apparatus and batch type sintering method which are one Embodiment of this invention, and is the schematic which shows the principal part of the batch type sintering apparatus shown in FIG. It is a partial top view, (b) A side view, (c), A partial sectional view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which illustrates typically the batch type sintering apparatus and batch type sintering method which are one Embodiment of this invention, and is the particle size of the mixing | blending raw material charged in the sintering pan with which a batch type sintering apparatus is equipped. It is the schematic which shows distribution. It is a figure which illustrates typically the batch type sintering apparatus and batch type sintering method which are one Embodiment of this invention, and when manufacturing a sintered ore using the batch type sintering apparatus shown in FIG. It is a graph which shows the relationship between the layer height of the mixing | blending raw material deposited in the sintering pot, and a particle size. It is a figure which illustrates typically the batch type sintering apparatus and batch type sintering method which are other embodiment of this invention, and is the schematic which shows the whole structure of a batch type sintering apparatus. It is a figure which illustrates typically the batch type sintering apparatus and batch type sintering method which are other embodiment of this invention, and when manufacturing a sintered ore using the batch type sintering apparatus shown in FIG. It is a graph which shows the relationship between the layer height of the mixing | blending raw material deposited in the sintering pot, and a particle size.

  Hereinafter, embodiments of the batch type sintering apparatus and the batch type sintering method of the present invention will be described mainly with reference to FIGS. 1 to 6 as appropriate. In addition, since this embodiment explains in detail in order to make the meaning of the batch type sintering apparatus and batch type sintering method of the present invention better understood, the present invention is limited unless otherwise specified. is not.

First, the technical idea of the present invention will be described below.
The sintered ore produced by the batch-type sintering apparatus and the batch-type sintering method of the present invention is a blast furnace raw material used in the iron making process. In particular, the present inventors made extensive studies in order to suppress heat shortage on the upper layer side and heat excess on the lower layer side when producing sintered ore using a batch-type sintering apparatus. . As a result, when charging the compounding raw material, which is the raw material, into the sintering pot, the classification part that continuously changes the arrangement position according to the particle size, and the compounding raw material screened by this classification part according to the particle size It has been found that the composition raw material can be charged into the sintering pot while applying a predetermined segregation by rotating the conveyor in the payout direction. .

  Here, in general, in the case of a continuous sintering apparatus such as a DL type, the composition raw material that is continuously supplied rolls on the slope, so that the powdery coke having a smaller particle size compared to other raw material particles, Under constant gravity, it naturally goes up. However, when a conventional batch type sintering apparatus such as POT type or GW type is used, the blending raw material is supplied into the inside of the sintering pot by a predetermined unit (batch type), so the sintering pot Since the distribution of coke in the layer height direction is almost constant, there is a problem that heat is insufficient on the upper layer side and heat is excessive on the lower layer side. For this reason, segregation of coke in the upper and lower layers as described above cannot be imparted, and not only the thermal efficiency during sintering is lowered and the productivity is deteriorated, but also the quality difference between the upper and lower layers occurs, and the resulting firing is obtained. There was a problem that the yield of the ore decreased. In addition, for example, when a batch-type sintering apparatus is used as a test apparatus and a reproduction test of a continuous-type sintering apparatus that is frequently used as an actual machine in an ironworks or the like is performed, the filling state of a raw material blend is reproduced. It was not possible, and there was a problem with the function as a hard simulator.

  In order to deal with such a conventional problem, in the present invention, as described in detail below, when the compounding raw material is charged (filled) into the sintering pot, the arrangement position continuously changes according to the particle diameter. A configuration provided with classification means was adopted. As a result, the coke concentration of the blended raw material to be filled in the sintering pan can be continuously charged so that it becomes thicker on the upper layer side but thinner on the lower layer side. The entire thermal history can be made uniform.

[First Embodiment]
Hereinafter, a first embodiment of a batch-type sintering apparatus and a batch-type sintering method of the present invention will be described with reference to FIGS.

"Batch type sintering machine"
As shown in FIG. 1, the batch-type sintering apparatus 10 of the present embodiment is an apparatus that manufactures a sintered ore 50 by sintering a blended raw material 55 containing at least fine ore, limestone, and coke in a batch system. The raw material supply unit 1 for supplying the mixed raw material 55, the classification unit 2 for screening the mixed raw material 55 supplied from the raw material supply unit 1 according to the particle size d, and the classification unit 2 The conveyor 3 in which the blended raw material 55 is classified and arranged in the dispensing direction H according to the particle diameter d, and the blended raw material 55 disposed on the conveyor 3 is dispersed and charged, and the mixed raw material 55 is heated. And a sintering pot 4 for sintering.

  And as shown in FIG.1 and FIG.2 (a)-(b), the batch-type sintering apparatus 10 of this embodiment is a position where the classification | category part 2 respond | corresponds to the upstream of the conveyor 3, and is 22 sieves. The fine grain 22A side is arranged, and the coarse grain 22B side of the sieve mesh 22 is arranged at a position corresponding to the downstream side, so that the particle diameter d is increased from the upstream side of the conveyor 3 toward the downstream side. The compounding raw material 55 is arrange | positioned so that it may become large continuously. Further, when the conveyor 3 rotates in the payout direction H, when the blended raw material 55 disposed on the conveyor 3 is charged into the sintering pot 4, The particle size segregation is imparted so that the particle size d of the blended raw material 55 continuously decreases from the bottom 4b side toward the top 4a side.

As a raw material for sintering for producing the sintered ore 50, the raw material 55 containing at least iron ore, limestone and coke is mentioned as in the past, and further, serpentine, return ore, etc., as necessary. It is also possible to use a blended raw material containing
Here, as an iron ore (powder ore) which is a main raw material, it is preferable to use a thing with a particle size of 10 mm or less, for example.
Limestone is an auxiliary material functioning as a flux in the blended material 55, and for example, limestone having a thickness of 5 mm or less is preferably used.
The coke is a powdery coke that becomes a coagulation material during sintering. For example, it is preferable to use a coke of 3 mm or less.

The raw material supply unit 1 is for supplying the classification raw material 55 with a blended raw material 55 containing at least fine ore, limestone, and coke, which is agitated and mixed by a mixer means (not shown). The raw material supply unit 1 in the illustrated example includes a hopper 11 in which a blended raw material 55 before classification is filled, and a cutout conveyor 12 for transporting the blended raw material 55 to be discharged from the discharge port 11a of the hopper 11. ing. About the hopper 11 and the cutting conveyor 12 which comprise such a raw material supply part 1, the thing similar to the sintering apparatus conventionally used in this field | area can be used without a restriction | limiting at all.
The pre-classified blended raw material 55 filled in the hopper 11 is fed from the discharge port 11a onto the cutout conveyor 12, and then conveyed toward the classifying unit 2 described later.

  The classification unit 2 has a function of sieving the blended raw material 55 supplied from the raw material supply unit 1 according to the particle size d. The classifying unit 2 of the example described in the present embodiment is a kind of probability sieve, and as shown in FIGS. 1 and 2, a plurality of elongated sieves in which the size of the sieve mesh 22 is changed in the length direction. The sieve member 21 is configured in a comb shape. Moreover, the classification part 2 is provided with the sieve mesh, ie, the longitudinal direction of the sieve member 21, along the discharge direction H of the conveyor 3 mentioned later. Further, the comb-shaped classification unit 2 in the illustrated example is provided with the fine mesh 22A side of the sieve mesh 22 at a position corresponding to the upstream 3A side of the conveyor 3 described later, and at the position corresponding to the downstream 3B side. The coarse 22B side of 22 is arrange | positioned. Furthermore, the classifying unit 2 in the illustrated example is disposed so as to be inclined downward from the fine mesh 22A side to the coarse mesh 22B side. Thereby, the compounding raw material 55 supplied from the raw material supply part 1 moves from the fine 22A side to the coarse 22B side while sliding on the sieve member 21. At this time, among the blended raw materials 55, the particles having a low particle size fall downward from the vicinity of the fine 22A and are arranged on the upstream 3A side of the conveyor 3, while the particles having a large particle size are passed to the coarse 22B side. After moving while sliding, it falls from the vicinity of the coarse 22B and is arranged on the downstream 3B side of the conveyor 3. Thereby, the mixing | blending raw material 55 is arrange | positioned sequentially from a particle | grain with a small particle size in the range from the upstream 3A side on the belt 3a of the conveyor 3 to the downstream 3B side.

In this embodiment, as shown in FIGS. 2A to 2C, the interval C of the sieve mesh 22 in the classification unit 2 is 3 to 7 mm on the fine mesh 22A side at the position corresponding to the upstream 3A side of the conveyor 3. The range is preferably 10 to 23 mm on the coarse grain 22B side corresponding to the downstream 3B side. Furthermore, the interval C _H as viewed from above the classification zone 2 of the sieve mesh 22, it is preferable to employ a configuration is the same between the minutia 22A side and the coarse 22B side. In the example shown in FIG. 2 (a) ~ (c) , if the viewed from the side of the classifying portion 2 of the sieve 22 spacing was _{C V,} each interval _C, C H, the relationship of _{C V,} the following It can be represented by the formula {C = √ (C _H ² + C _V ² ).

In the present embodiment, by setting the intervals C, C _H , and C _V of the sieve mesh 22 in the classifying portion in the above ranges and relationships, the blended raw material 55 is continuously sieved according to the particle size d. be able to. Thereby, as will be described later, the blended raw material 55 can be arranged so that the particle diameter d continuously increases from the upstream 3A side to the downstream 3B side of the conveyor 3 according to the particle diameter d. It becomes.

  In addition, the classification part used in this embodiment is not limited to the thing of the said structure. For example, the classifying unit may be configured as a horizontal bar type in which the interval is widened toward the downstream side instead of the vertical bar type probability sieve formed of the above-described sieve member. Or you may use the mesh-shaped sieve by which the mesh was expanded toward the downstream as a classification | category part.

The conveyor 3 is arranged on the belt 3a while the mixed raw material 55 sieved by the classifying unit 2 is dropped, and the conveyor shaft 3b is connected to power means (not shown) and is configured to be rotatable. Yes. Further, on the belt 3a of the conveyor 3, the blended raw material 55 sieved by the classifying unit 2 is classified and arranged in the dispensing direction H according to the particle diameter d. In the present embodiment, as described above, the blended raw material 55 is arranged so that the particle diameter d continuously increases from the upstream 3A side of the conveyor 3 toward the downstream 3B side.
As such a conveyor 3, the same conveyor as conventionally used in this field or the like can be used without any limitation. In addition, since it is necessary to deposit the blended raw material 55 highly on the belt 3a because the amount of the blended raw material 55 is large, for example, it is more preferable to employ a configuration in which barriers are provided on both sides of the conveyor 3. .

The sintering pan 4 is a pan-shaped member that sinters the blended raw material 55 by burning the coke contained in the blended raw material 55 with air sucked from above into the lower layer in the packed bed. Yes, those conventionally used in this field and the like can be employed without any limitation.
Moreover, in this embodiment, when the belt 3a of the conveyor 3 mentioned above rotates in the paying-out direction H, the mixing | blending raw material 55 is sequentially charged in the inside of the sintering pot 4. FIG.

  Here, as described above, the blended raw material 55 is arranged so that the particle diameter d continuously increases from the upstream 3A side of the conveyor 3 toward the downstream 3B side. When the conveyor 3 on which the blended raw material 55 is arranged in this state is rotated in the payout direction H, the blended raw material 55 charged inside the sintering pan 4 is deposited as shown in the schematic diagram of FIG. In the direction, the particles are filled in a state where grain size segregation is applied so that the grain size d continuously decreases from the bottom 4b side to the top 4a side of the sintering pot 4. As a result, the coke concentration of the blended raw material 55 inside the sintering pot 4 increases on the upper 4a side of the sintering pot 4, while it decreases on the bottom 4b side.

  In the present embodiment, the blended raw material 55 charged into the sintering pan 4 is sintered by ignition and suction means (not shown) in a state where the above-described particle size segregation and coke concentration segregation are given. Do. As a result, the blended raw material 55 in the sintering pan 4 can obtain sufficient sintering heat on the upper layer side having a high coke concentration during heat sintering, while the sintering heat is suppressed on the lower layer side having a low coke concentration. As a result, excessive heat can be prevented, and the heat history of the entire blended raw material can be made uniform. Thereby, the quality difference between the upper and lower layers of the sintered ore 50 to be manufactured is reduced, the thermal efficiency is improved, the yield is improved, and the productivity is increased. Further, by improving the thermal efficiency, the amount of coke used as the coagulant, that is, the content of coke in the blended raw material 55 can be reduced, and the manufacturing cost can be reduced. Moreover, when such a batch type sintering apparatus 1 is applied to a reproduction test of a continuous DL type sintering apparatus, the filling state of the blended raw material 55 can be accurately reproduced, and a hard simulator can be used. Test accuracy is greatly improved.

"Batch type sintering method"
Below, the method of sintering the compounding raw material 55 using the batch type sintering apparatus 10 of this embodiment and obtaining the sintered ore 50 is demonstrated with reference to FIG.
The batch-type sintering method of the present embodiment is a method for producing the sintered ore 50 by sintering the blended raw material 55 containing at least powdered ore, limestone and coke in a batch manner, and supplies the blended raw material 55. The raw material supply step (1), the blended raw material 55 is sieved according to the particle size d and arranged on the conveyor 3, and the particle size d increases continuously from the upstream 3A side to the downstream 3B side of the conveyor 3 The classifying step (2) to be arranged in such a way that the conveyor 3 is rotated in the payout direction H, whereby the blended raw material 55 arranged on the conveyor 3 is moved from the bottom 4b side to the upper 4a side in the deposition direction. Filling step (3) in which the particle size segregation is applied so that the particle size d continuously decreases as it goes to the inside of the sintering pan 4 while being charged, and the coke is burned to mix the raw materials in the sintering pan 4 55 Sintered by heat, sintering step (4) to obtain a sinter 50 made sequentially with the steps of.

(1) Raw material supply step In this embodiment, before the raw material supply step, first, iron ore as a main material, limestone as a secondary material, and coke are put into a mixer means (not shown) and mixed by stirring. A blending raw material 55 is prepared.
Next, in the raw material supply step, the blended raw material 55 is charged into the hopper 11 of the raw material supply unit 1. The blended raw materials 55 charged in the hopper 11 are sequentially discharged from the discharge port 11a and sent onto the cutout conveyor 12, and then sent toward the classifying unit 2 as the cutout conveyor 12 is rotated. Is done.

(2) Classification step Next, in the dispensing step, the blended raw material 55 is sieved according to the particle size d and arranged on the conveyor 3, and the particles are moved from the upstream 3A side to the downstream 3B side of the conveyor 3. It arrange | positions so that the diameter d may become large continuously.

Specifically, in the vertically lower side of the raw material supply unit 1, the blended raw material 55 supplied on the classification unit 2 that is inclined downward from the fine mesh 22 </ b> A side to the coarse mesh 22 </ b> B side is provided as a sieve member. 21 moves from the fine 22A side to the coarse 22B side while sliding on 21. And among the mixing | blending raw materials 55, a particle | grain with a low particle size falls below 22 A of fine items, and is arrange | positioned on the upstream 3A side of the conveyor 3. FIG. Next, the raw material 55 having a large particle size moves while sliding on the sieve member 21 to the coarse 22B side, then falls from the vicinity of the coarse 22B, and is arranged on the downstream 3B side of the conveyor 3.
Due to the above-described operation, the blended raw material 55 is sequentially arranged from particles having a low particle size in the range from the upstream 3A side to the downstream 3B side on the belt 3a of the conveyor 3.

(3) Filling step Next, in the filling step, by rotating the conveyor 3 in the payout direction H, the blended raw material 55 placed on the conveyor 3 is moved upward from the bottom 4b side of the sintering pot 4 in the deposition direction. Dispersing and charging into the inside of the sintering pot 4 while giving particle size segregation so that the particle size d continuously decreases toward the 4a side.

Specifically, the conveyor shaft 3b connected to the power means (not shown) is rotated so that the particle diameter d is continuously increased on the belt 3a from the upstream 3A side toward the downstream 3B side. The blended raw materials 55 are sequentially charged into the sintering pot 4 in a dispersed manner.
At this time, the blended raw material 55 is arranged so that the particle diameter d increases as it goes from the upstream 3A side to the downstream 3B side of the conveyor 3, so that it goes from the bottom 4b side to the top 4a side of the sintering pot 4. Filling is performed in a state where particle size segregation is applied so that the particle size d is continuously reduced. By imparting such particle size segregation, the coke concentration of the blended raw material 55 inside the sintering pot 4 increases on the upper 4a side of the sintering pot 4, but decreases on the bottom 4b side.

(4) Sintering Step Next, in the sintering step, the blended raw material 55 charged in the sintering pan 4 is sintered to obtain the sintered ore 50.
Specifically, after igniting the upper surface of the blended raw material 55 using an unillustrated ignition furnace disposed above the sintering pot 4, an unillustrated wind box disposed below the sintering pot 4. The coke in the blended raw material 55 is sequentially combusted from the upper layer side to the lower layer side by aspirating air from above to ventilate the sintering pot 4 from above to below. As a result, the blended raw material 55 is heated in the sintering pan 4 in a state where the above-mentioned grain size segregation and coke concentration segregation are imparted, and the sintered steel 50 is obtained.

Here, the blended raw material 55 in the sintering pan 4 is capable of obtaining sufficient sintering heat on the upper layer side where the coke concentration is high, while the sintering heat is suppressed on the lower layer side where the coke concentration is low. Therefore, the heat history of the entire blended raw material is made uniform. Thereby, the quality difference between the upper and lower layers of the sintered ore 50 to be manufactured is reduced, the thermal efficiency is improved, the yield is improved, and the productivity is increased. Further, the coke content in the blended raw material 55 can be reduced, and the manufacturing cost can be reduced.
Furthermore, when the batch type sintering apparatus 10 of the present embodiment is applied to a reproduction test of a continuous type sintering apparatus, the filling state of the blended raw materials can be accurately reproduced, and the test accuracy as a hard simulator Has the effect of significantly improving.

[Second Embodiment]
Hereinafter, a second embodiment of the batch type sintering apparatus and the batch type sintering method of the present invention will be described with reference mainly to FIGS. 5 and 6. In the following description, components common to those in the first embodiment will be described with the same reference numerals, and detailed description thereof will be omitted.

  The batch-type sintering apparatus 60 of the present embodiment includes a raw material supply unit 1 for supplying the blended raw material 55, a classification unit 2 that sifts the blended raw material 55 supplied from the raw material supply unit 1 according to the particle size d, and The first mixed material 55 sieved in the classifying unit 2 is classified and arranged in the dispensing direction H in accordance with the particle diameter d, and the first conveyor 31 is disposed vertically below the first conveyor 31. As the first conveyor 31 is arranged in parallel with the conveyor 31 and rotates in the payout direction H, the blended material 55 disposed on the first conveyor H is dropped and supplied. However, according to the particle diameter d, the second conveyor 32 classified and disposed in the dispensing direction H and the blended raw material 55 disposed on the second conveyor 32 are dispersed and charged. Sintering for heating and sintering 4, schematically configured to include a.

  In the classifying unit 2, the fine mesh 22A side of the sieve mesh 22 is arranged at a position corresponding to the downstream 31B side of the first conveyor 31, and the coarse mesh 22B side of the sieve mesh 22 is arranged at a position corresponding to the upstream 31A side. By doing so, the compounding raw material 55 is arrange | positioned so that the particle size d may become small continuously as it goes to the downstream 31B side from the upstream 31A side of the 1st conveyor 31. FIG. Next, when the first conveyor 31 is rotated in the payout direction H <b> 1, when the blended raw material 55 disposed on the first conveyor 31 is supplied onto the second conveyor 32, the second conveyor 32 is connected to the first conveyor 31. By rotating in the opposite direction R, the blended raw material 55 is arranged so that the particle diameter d continuously increases from the upstream 32A side of the second conveyor 32 toward the downstream 32B side. Then, the second conveyor 32 rotates in the dispensing direction H <b> 2, so that when the blended raw material 55 disposed on the second conveyor 32 is charged into the sintering pot 4, It is comprised so that a particle size segregation may be provided so that the particle size d of the mixing | blending raw material 55 may become small continuously as it goes to the upper part 4a side from the bottom 4b side of the knot 4.

  In the batch-type sintering apparatus 60 of the present embodiment, after the blended raw material 55 to be screened in the classification unit 2 is arranged on the first conveyor 31, the first conveyor 31 rotates to be on the second conveyor 32. It is comprised so that the mixing | blending raw material 55 may be arrange | positioned. Thereafter, the second conveyor 32 is rotated so that the blended raw material 55 is filled in the sintered pan 4 in a state where grain size segregation is given. Different from the tying apparatus 10.

  In addition, the upstream 32A side on the 2nd conveyor 32 demonstrated in this embodiment is the side which receives the mixing | blending raw material 55 first in the rotation direction of the 2nd conveyor 32 at the time of receiving the mixing | blending raw material 55 from the 1st conveyor 31. Say. Moreover, the downstream 32B side on the 2nd conveyor 32 means the side which pays out the mixing | blending raw material 55 initially in the rotation direction of the 2nd conveyor 32 at the time of paying out the mixing | blending raw material 55. FIG.

  Moreover, the batch-type sintering method of this embodiment uses the batch-type sintering apparatus 60 of this embodiment as described above, and sinters the blended raw materials containing at least fine ore, limestone and coke in a batch type. In the raw material supply step (1) for supplying the blended raw material 55, the blended raw material 55 is continuously sieved according to the particle size d and disposed on the first conveyor 31. The classifying step (2) in which the particle size d is continuously reduced from the upstream 31A side to the downstream 31B side of the first conveyor 31, by rotating the first conveyor 31 in the payout direction H1, The blended raw material 55 disposed on the first conveyor 31 is dropped and supplied toward the second conveyor 32 disposed in parallel with the first conveyor 31 below the first conveyor 31. At the same time, by rotating the second conveyor 32 in the direction R opposite to that of the first conveyor 31, the blended raw material 55 so that the particle diameter d continuously increases from the upstream 32 A side to the downstream 32 B side of the second conveyor 32. Placing step (3), by rotating the second conveyor 32 in the payout direction H2, the blended raw material 55 placed on the second conveyor 32 is moved upward from the bottom 4b side of the sintering pot 4 in the deposition direction. Filling step (4) of dispersing and charging the inside of the sintering pot 4 while imparting particle size segregation so that the particle diameter d continuously decreases toward the 4a side, and the blended raw material charged in the sintering pot 4 Sintering process (5) which sinters 55 and obtains the sintered ore 50 is sequentially provided.

  In the present embodiment, the blended raw materials 55 that are sieved in the classifying unit 2 are arranged such that the particle diameter d continuously decreases from the upstream 31A side of the first conveyor 31 toward the downstream 31B side. That is, the direction arrange | positioned according to the particle size d is opposite to the form arrange | positioned on the conveyor 3 in 1st Embodiment. In the present embodiment, the particle diameter d is continuously increased from the upstream 32A side to the downstream 32B side on the second conveyor 32 by paying out the blended raw material 55 disposed on the first conveyor 31. To be larger.

  Next, in the present embodiment, by rotating the second conveyor 32 in the payout direction H2, similarly to the first embodiment, the blended raw material 55 disposed on the second conveyor 32 is sintered in the stacking direction 4 in the deposition direction. The dispersion is charged into the inside of the sintering pot 4 while imparting particle size segregation so that the particle size d decreases from the bottom 4b side to the top 4a side. At this time, when the charging chute 41 is fixed-point charging, self-segregation of the blended raw material 55 that flows into the inclined portion of the stack of the blended raw material 55 that is gradually formed in the sintering pan 4 occurs. There is a possibility that the continuous classification state steadily formed on the conveyor 32 collapses in the sintering pot 4. For this reason, the charging chute 41 is configured such that the tip of the charging chute 41 can be moved laterally in the sintering pot 4 simultaneously with the charging of the blended raw material 55. It is preferable from the point which can suppress collapse of classification.

  And similarly to 1st Embodiment, after igniting the upper surface of the mixing | blending raw material 55 using the ignition furnace not shown arrange | positioned above the sintering pot 4, it arrange | positioned under the sintering pot 4 By sucking air from an unillustrated wind box and ventilating the sintering pot 4 from above to below, the coke in the blended raw material 55 is sequentially burned from the upper layer side to the lower layer side. As a result, the blended raw material 55 is heated in the sintering pan 4 in a state where the above-mentioned grain size segregation and coke concentration segregation are imparted, and the sintered steel 50 is obtained.

  In this embodiment, the arrangement according to the particle size d of the blended raw material 55 is added to the classifying unit 2 and the above-described configuration is adopted in which the two-stage classification arrangement including the first conveyor 31 and the second conveyor 32 is performed. As a result, it is possible to further enhance the particle size segregation as compared with the case where the first embodiment is applied.

  Here, the graph shown in FIG. 4 is a sintering pot which classifies the blended raw materials using the batch-type sintering apparatus and the batch-type sintering method described in the first embodiment of the present invention and imparts particle size segregation. It is a graph which shows the relationship between the layer height of a mixing | blending raw material and the particle size which were inserted in the inside. Moreover, the graph shown in FIG. 6 is a graph in which an experiment was similarly performed using the batch-type sintering apparatus and the batch-type sintering method described in the second embodiment. Moreover, the particle size distribution of the compounding raw material used as a raw material in this case is shown in the graph of Table 1 below.

  As shown in FIG. 4, according to the first embodiment of the present invention, that is, by classifying the blended raw materials using the batch type sintering apparatus 1 as shown in FIG. It can be seen that in the entire layer height of 600 mm, the proportion of the blended raw material having a particle size of 5 mm or more increases from the bottom side to the position of about 120 mm. On the other hand, at a position above about 120 mm from the bottom side of the sintering pot, the proportion of the raw material with a particle size of less than 3 mm is increasing, and the proportion of small-diameter particles is gradually increasing toward the upper layer. I understand.

On the other hand, as shown in FIG. 6, when the same experiment is performed using the second embodiment of the present invention, that is, the batch-type sintering apparatus 10 as shown in FIG. 5, the graph shown in FIG. As in the case of, it can be seen that the proportion of the blended raw material having a particle size of 5 mm or more increases from the bottom side to the position of about 120 mm. Moreover, it turns out that the ratio of the mixing | blending raw material whose particle size is less than 3 mm is increasing in the position above about 120 mm from the bottom part side of a sintering pot like the above.
Furthermore, when the batch-type sintering apparatus 10 as shown in FIG. 5 is used, as shown in the graph of FIG. 6, particularly in the position where the layer height is 400 mm or more, the blended raw material having a particle size of less than 3 mm. It can be seen that the ratio of is very high. That is, it can be seen that the segregation of particle size can be further enhanced in the sintering pot.

  As described above, according to the batch-type sintering apparatus and the batch-type sintering method according to the present invention, when the blended raw material 55 arranged on the conveyor is charged into the sintering pot 4 according to the above configuration. In the deposition direction of the blended raw material 55, it can be applied while strengthening the particle size segregation so that the particle diameter d of the blended raw material 55 decreases from the bottom 4b side of the sintering pot 4 toward the upper 4a side. As a result, the coke concentration of the blended raw material 55 filled in the sintering pan 4 can be continuously charged so that the coke concentration becomes thicker on the upper layer side, but thinner on the lower layer side. The thermal history of the entire blended raw material 55 is made uniform, the quality difference between the upper and lower layers is reduced, the thermal efficiency is improved, the yield is improved, the productivity is increased, and the use of coke as a coagulant is used. The amount can be reduced. In addition, when the present invention is applied to a reproduction test of a continuous sintering apparatus such as a DL type, the filling condition of the compounding raw material, which is a raw material, can be accurately reproduced, and the test accuracy as a hard simulator is greatly increased. To improve. Therefore, by applying the batch-type sintering apparatus and batch-type sintering method of the present invention in the iron making process of the iron making process, it is possible to fully enjoy the merits such as improvement of hot metal quality and reduction of manufacturing cost, Its social contribution is immeasurable.

  Hereinafter, examples of the batch-type sintering apparatus and batch-type sintering method according to the present invention will be given to describe the present invention more specifically, but the present invention is not limited to the following examples from the beginning, The present invention can be implemented with appropriate modifications within a range that can be adapted to the purpose described below, and these are all included in the technical scope of the present invention.

[Example 1]
In this example, after using a batch-type sintering apparatus 10 as shown in FIG. 1, classification processing of the raw material mixture was performed, and the raw material mixture was charged into the sintering pan while imparting particle size segregation. The sintering process was performed.
At this time, as the blended raw material 55 which is a raw material, a material containing 83% by weight of fine ore, 17% by weight of a secondary material containing 13% by weight of limestone, and a material containing 4.5% by weight of coke as a non-mixed number is prepared. The particle size distribution of the blended raw material 55 is shown in Table 1 above.

In this example, as described above, the batch-type sintering apparatus 10 was used, and first, the blended raw material 55 was charged into the hopper 11 of the raw material supply unit 1.
Next, the blended raw material 55 was supplied toward the classifying unit 2 installed vertically below the raw material supply unit 1, and the blended raw material 55 was classified and placed on the conveyor 3.
Next, the conveyor 3 was rotated in the dispensing direction H, and the blended raw materials 55 arranged on the conveyor 3 were sequentially charged into the sintering pot 4. At this time, the sintering pot 4 having an internal dimension of 300 mm in diameter and 600 mm in height was used, and a total of 75 kg of the blended raw material 55 was charged.

  In this example, the particle size distribution measurement in the height direction of the packed bed and the sintering process were performed separately. In the particle size distribution measurement, the raw material 55 was charged into the sintering pot 4 and then the raw materials were sequentially collected from the surface layer at a thickness of 30 mm and divided into 10 parts, and after drying, the weight and particle size distribution were measured. The particle size distribution was represented by the weight ratio in Table 1 with the particle size classification shown in Table 1 above.

  As a result, the particle size distribution of the blended raw material 55 in the sintering pot 4 is such that the particle diameter d decreases from the bottom 4b side to the upper 4a side of the sintering pot 4, as shown in the graph of FIG. It became clear that segregation was given.

In the sintering process, the blended raw material 55 charged in the sintering pot 4 was sintered by ignition at 1100 ° C. × 90 seconds and suction operation at 13 kPa, and a sintered ore 50 was obtained. At this time, the compounding raw material 55 charged in the sintering pot 4 is given segregation in particle size so that the particle diameter d decreases from the lower layer side to the upper layer side in the sintering pot 4. The coke concentration of the raw material 55 is thicker on the upper layer side of the sintering pan 4 and thinner on the lower layer side. Thus, as shown in the evaluation results shown in Table 2 below, the blended raw material 55 is efficiently sintered without causing heat shortage on the upper layer side in the sintering pot 4, and the blended raw material 55 in the sintering pot 4 is obtained. The heating time for completing the entire sintering was as short as 35 minutes, the thermal history became uniform, and the yield was 78% by mass. As a result, it was confirmed that the raw material supply rate (F), which is an index of productivity, was 34 t / d / m ² and was extremely excellent in productivity.

[Example 2]
In the present example, except that a batch-type sintering apparatus 60 as shown in FIG. 5 is used, the blending raw material is classified in the same manner as in Example 1 above, and in the sintering pan while imparting particle size segregation. After charging the blended raw materials, a sintering process was performed.

  In this example, first, the blended raw material 55 sieved in the classification unit 2 was arranged so that the particle diameter d became smaller from the upstream 31A side of the first conveyor 31 toward the downstream 31B side. Next, the first conveyor 31 is rotated in the dispensing direction H1, and the particle diameter d of the blended raw material 55 arranged on the first conveyor 31 increases from the upstream 32A side to the downstream 32B side on the second conveyor 32. Arranged to be.

  Next, by rotating the second conveyor 32 in the payout direction H2, the raw material 55 arranged on the second conveyor 32 is moved from the bottom 4b side to the upper 4a side of the sintering pot 4 as in the first embodiment. Dispersion charging was performed while imparting particle size segregation so that the particle size d became smaller as it went.

  Next, in the same manner as in Example 1, the particle size distribution of the blended raw material 55 inside the sintering pot 4 was investigated, and the presence or absence of particle size segregation was confirmed. As a result, as shown in the graph of FIG. 6, the particle size distribution of the blended raw material 55 in the sintering pot 4 is provided with particle size segregation so that the particle size d decreases from the lower layer side toward the upper layer side. Became clear. Further, as is clear from a comparison between the graph of FIG. 4 (first embodiment; Example 1) and the graph of FIG. 6 (second embodiment; Example 2), in this example, It can be seen that at the position where the layer height is 400 mm or more, the ratio of the blended raw material having a particle size of less than 3 mm is very high. That is, it is clear that the grain size segregation is further strengthened in the sintering pot 4.

As a result of sintering as in Example 1, a more preferable result than Example 1 was obtained. That is, as shown in Table 2 above, the sintering time was shortened to 33 minutes and the yield was improved to 80% by mass. As a result, the raw material supply rate was 37 t / d / m ² , and it was confirmed that the productivity was higher than that of Example 1.

[Comparative example]
In this comparative example, the same ingredients as in Examples 1 and 2 above, and the blended raw materials having the particle size distribution shown in Tables 1 and 2 were used, and the conventional batch type manual charging method was used. After charging the blended raw material into the knot, the sintering process was performed. At this time, since the classification treatment was not performed, it was confirmed that the blended raw material deposited in the sintering pan had the same particle size distribution in both the upper layer and the lower layer, and there was no particle size segregation.

And as a result of conducting an experiment in the same manner as in Examples 1 and 2, as shown in Table 2, the sintering time was 40 minutes and the yield was 72% by mass. As a result, this was an index of productivity. The raw material supply rate remained at 28 t / d / m ² . In this comparative example, this does not classify the blended raw material to which the batch-type sintering apparatus and batch-type sintering method according to the present invention is applied, and no particle size segregation is imparted to the blended raw material in the sintering pan. From this, it is considered that heat shortage occurs on the upper layer side, while heat is excessive on the lower layer side, and the heat history is not uniform.

  From the results of the examples described above, by applying the batch-type sintering apparatus and the batch-type sintering method of the present invention, the thermal efficiency is improved in producing sintered ore which is a raw material for blast furnace in the iron making process. It was revealed that yield was improved and productivity was increased. In addition, it is clear that by applying the present invention to a reproduction test of a continuous sintering apparatus, the filling situation of the blended raw material that is the raw material can be accurately reproduced, and the test accuracy is greatly improved.

  According to the present invention, regarding the production of sintered ore, which is a raw material for blast furnaces in the iron making process, the coke concentration of the blended raw material is on the upper layer side by giving particle size segregation to the blended raw material charged into the sintering pot. It becomes possible to insert the material so as to become thin on the lower layer side while becoming darker. As a result, the thermal history of the entire blended raw material during sintering is made uniform, the quality difference between the upper and lower layers is reduced, the thermal efficiency is improved, the yield is improved, the productivity is increased, and the coagulant is used. It is possible to reduce the amount of coke used. In addition, when the present invention is applied to a reproduction test of a continuous type sintering machine such as a DL type, it is possible to accurately reproduce the filling state of the raw material blended raw material, and the test accuracy as a hard simulator is greatly increased. To improve. Therefore, by applying the batch-type sintering apparatus and batch-type sintering method of the present invention in the iron making process of the iron making process, it is possible to fully enjoy the merits such as improvement of hot metal quality and reduction of manufacturing cost, Its social contribution is immeasurable.

10, 60 ... Batch type sintering apparatus 1 ... Raw material supply unit,
11 ... Hopper,
11a ... discharge port,
12 ... Cutting conveyor,
2 ... Classification part 21 ... Sieving member,
22: sieve mesh,
22A ... details,
22B ... Coarse,
3 ... conveyor,
3a ... belt 3b ... rotating shaft,
3A… Upstream,
3B ... downstream,
31 ... 1st conveyor,
31A… Upstream,
31B ... downstream,
32 ... second conveyor,
32A… Upstream,
32B ... downstream,
4 ... Sintering pan,
4a ... the upper part,
4b ... bottom,
50 ... sintered ore,
55 ... Mixing raw materials,
C: Interval (sieve),
C _H ... spacing {horizontal direction (plane) spacing (screen)},
C _V ... interval {interval in vertical direction (side surface) (sieve)},
d: Particle size (mixed raw material),
H, H1, H2 ... payout direction,

Claims (4)

A batch-type sintering apparatus for producing sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch type,
A raw material supply unit for supplying the blended raw material;
A classification unit that continuously sifts the blended raw material supplied from the raw material supply unit according to a particle size, and the blended raw material that is sifted by the classifying unit is continuously in the dispensing direction according to the particle size. A conveyor that is classified and arranged,
A sintering pan for charging the continuously classified blended raw material disposed on the conveyor to sinter the blended raw material, and
The classification unit has a fine mesh side disposed at a position corresponding to the upstream side of the conveyor, and a coarse mesh side disposed at a position corresponding to the downstream side, whereby the upstream side of the conveyor Arrange the blended raw material so that the particle diameter continuously increases from the downstream side to the downstream side,
The conveyor is rotated in the discharge direction from the downstream side, so that when the blended material arranged on the conveyor is charged into the sintering pot, the sintering is performed in the deposition direction of the blended material. A batch-type sintering apparatus characterized by imparting particle size segregation so that the particle size of the blended raw material continuously decreases from the bottom side to the upper side of the pan. A batch-type sintering apparatus for producing sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch type,
A raw material supply unit for supplying the blended raw material;
A classification unit for continuously sieving the blended raw material supplied from the raw material supply unit according to a particle size;
A first conveyor in which the blended raw material sieved in the classifying unit is continuously classified in the dispensing direction according to the particle size; and
When the first conveyor is disposed downstream of the first conveyor in the dispensing direction and the first conveyor rotates in the dispensing direction, the blended material disposed on the first conveyor is dropped and supplied. , According to the particle size, a second conveyor that is continuously classified in the payout direction,
The blended raw material placed on the second conveyor is continuously classified and dispersed and charged, and comprises a sintering pan for heating and sintering the blended raw material,
The classification unit has a fine mesh side disposed at a position corresponding to the downstream side of the first conveyor, and a coarse mesh side disposed at a position corresponding to the upstream side. Arrange the blended raw material so that the particle size continuously decreases from the upstream side of the conveyor toward the downstream side,
The first conveyor rotates in the dispensing direction from the downstream side, so that when the blended raw material disposed on the first conveyor is supplied onto the second conveyor, the second conveyor is moved to the first conveyor. By rotating in the opposite direction, the blended raw material is arranged so that the particle size continuously increases from the upstream side to the downstream side of the second conveyor,
When the compounding material disposed on the second conveyor is charged into the inside of the sintering pot by rotating the second conveyor in the dispensing direction, the sintering pot in the deposition direction of the compounding material A batch-type sintering apparatus characterized in that grain size segregation is imparted so that the grain size of the blended raw material continuously decreases from the bottom side to the top side. A batch-type sintering method for producing a sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch method,
A raw material supply step of supplying the blended raw material;
A sieving step in which the blended raw material is continuously sieved according to the particle size and placed on a conveyor, and the particle size is continuously increased from the upstream side toward the downstream side of the conveyor; and
By rotating the conveyor in the payout direction, the blended raw materials arranged on the conveyor are sized so that the particle diameter continuously decreases from the bottom side to the top side of the sintering pot in the deposition direction. A filling step of dispersing and charging the inside of the sintering pot while imparting segregation;
And a sintering step of obtaining the sintered ore by sintering the blended raw material charged in the sintering pan. A batch-type sintering method for producing a sintered ore by sintering a blended raw material containing at least powdered ore, limestone and coke in a batch method,
A raw material supply step of supplying the blended raw material;
Classifying the blended raw materials continuously according to the particle size and arranged on the first conveyor, and arranged so that the particle size continuously decreases from the upstream side to the downstream side of the first conveyor. Process,
By rotating the first conveyor in the payout direction, the first conveyor is disposed on the first conveyor toward the second conveyor disposed in parallel with the first conveyor and vertically below the first conveyor. The blended raw material is dropped and supplied, and the second conveyor is rotated in the opposite direction to the first conveyor, so that the particle diameter continuously increases from the upstream side to the downstream side of the second conveyor. An arrangement step of arranging the blended raw materials as follows:
By rotating the second conveyor in the payout direction, the particle diameter of the blended raw material arranged on the second conveyor is continuously reduced from the bottom side to the upper side of the sintering pot in the deposition direction. A filling step of dispersing and charging the inside of the sintering pan while imparting particle size segregation,
And a sintering step of obtaining the sintered ore by sintering the blended raw material charged in the sintering pan.

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