JP2017057481A - Method for producing sintered ore - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a sintered ore solving sintering unevenness in the width direction of a sintering machine and capable of stably improving the quality and yield of a product sintered ore.SOLUTION: Provided is a method for producing a sintered ore where a sintering raw material containing fine ore and a carbonaceous material is charged to the surface of an endless movement type pallet 24 in an ore feed part 30 of a sintering machine 10 to form a charge layer, the upper surface of the charge layer is ignited by an ignition furnace 18 installed on the downstream side of the ore feed part 30, the sintering raw material is made into a sintered cake, and thereafter, the sintered cake is crushed to obtain a product sintered ore, in which an image of an ember layer imaged with the ember layer observed in a sintered cake crushed face of an ore exhaust part 32 is divided so as to be mapped in the order of the positions in the width direction of a divided gates 16 divided in the width direction of the pallet 24, and in such a manner that an ember layer difference as a difference between the upper face height of the ember layer of the divided one image and the upper face heights of the ember layers of all the images lies in a pre-decided range, the opening degree of the divided gate 16 at a position same in the pallet width direction as the ember layer of the divided one image is regulated.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for producing sintered ore used as an iron source in a blast furnace. Specifically, the present invention relates to a method for manufacturing a sintered ore that improves sintering yield by making the sintered ore firing uniform.

  Sintered ore, which is the main raw material for the blast furnace smelting method, is generally composed of iron ore powder, recovered iron mill powder, sintered ore sieving powder, CaO-containing raw materials such as limestone and dolomite, granulation aids such as quick lime, and powder coke. Manufactured using a Dwytroid (DL) sintering machine (hereinafter simply referred to as “sintering machine”), which is an endless moving bed type grate-type sintering machine, using carbonaceous materials (solid fuel) such as or anthracite Is done. The sintering raw material is charged on an endless moving pallet of a sintering machine, and a charging layer called a sintering bed is formed. The thickness (height) of the charging layer is about 400 to 800 mm. Thereafter, the carbon material in the charging layer is ignited by an ignition furnace installed above the charging layer. By sucking air downward through the wind box located under the pallet, the charcoal in the charge layer burns sequentially, and the combustion gradually proceeds to the lower layer and forward as the pallet moves. To do. Due to the combustion heat generated at this time, the sintered raw material is burned and melted to produce a sintered cake. Thereafter, the obtained sintered cake is crushed in the discharge portion, cooled by a cooler, and sized to become a product sintered ore.

  In the discharge portion before crushing the sintered cake, the sintered cake falls while breaking from the pallet. At this time, on the fracture surface of the sintered cake, there is a “location where the coke burns and burns red” which is called an after-fire layer. The shape of the after-fire layer changes depending on operating conditions such as the thickness of the charging layer in the pallet width direction, the pallet moving speed, and the variation in suction pressure sucked through the wind box. For this reason, it is known that the shape of the afterfire layer is used as an index for evaluating the product quality of the product sintered ore. The shape of the afterfire layer is preferably a thin and uniform shape at the bottom of the pallet from the viewpoint of improving the strength and yield of the sintered ore.

  In sintering the sintered ore, it has been conventionally studied to perform uniform firing in the pallet width direction. For example, in Patent Document 1, divided gates that are divided into multiple portions along the width direction of the charging layer are arranged in the feed section, and the residual layer thickness measuring means that immediately responds to the divided gates in the discharge section is divided into each division. Arranged for each gate. Next, the relationship between the deviation from the target value of the residual layer thickness and the charging line shape in the mine section is obtained offline, and the charging line shape is controlled for each divided gate so that the deviation becomes zero. Technology is disclosed.

JP-A-01-191751

  However, since the technique disclosed in Patent Document 1 aims to make the deviation between the afterfire layer thickness and the target value of the afterfire layer thickness zero, the thickness of the afterfire layer is made uniform. No consideration is given to the upper surface height of the afterfire layer. 1 shows an ideal after-fire layer, (1) an after-fire layer with a constant lower limit position, (2) an after-fire layer with a constant upper surface height, and (3) an after-fire layer with a constant thickness. Indicates the layer. In firing the sintered ore, the thickness of the residual layer can be controlled by the moving speed of the pallet and the coke ratio of the sintered material. Therefore, if the upper surface height of the afterfire layer can be made constant, an ideal afterfire layer can be obtained by controlling the moving speed of the pallet and the coke ratio of the sintered material. On the other hand, if the upper surface height is not constant even if the lower limit position of the afterfire layer is constant or the thickness is constant, the ideal afterfire layer can also be controlled by controlling the pallet moving speed and the coke ratio of the sintered material. I can't. Therefore, it can be understood that whether or not an ideal afterfire layer can be determined may be based on whether or not the upper surface height of the afterfire layer is constant.

  The present invention has been made in view of the above-mentioned problems of the prior art, and the purpose of the present invention is to produce a residual flame observed on a fracture surface of a sintered cake when a sintered ore is produced using a sintering machine. The upper surface height of the layer is controlled to be within a predetermined range. As a result, an ideal after-fire layer can be formed, so that the sintered ore can be uniformly sintered in the width direction, and the unevenness of sintering in the width method of the sintering machine can be eliminated. The quality and yield of the ore can be improved.

The features of the present invention for solving such problems are as follows.
[1] In a sintering machine, a charging layer is formed by charging sintered raw materials including fine ore and carbonaceous material onto an endless moving pallet in a feeding section of the sintering machine, and is installed downstream of the feeding section. The upper surface of the charging layer is ignited in a igniting furnace, and air is sucked and introduced into the charging layer by a wind box arranged below the pallet to burn the carbonaceous material and sinter the sintering raw material. In the method for producing a sintered ore obtained by crushing the sintered cake at the waste ore part to obtain a product sintered ore, the residue observed on the sintered cake fracture surface of the ore part is obtained. The image of the afterfire layer acquired by imaging the fire layer is divided in association with the order of the position in the width direction of the divided gate divided in the width direction of the pallet, and the afterimage layer of the one image divided is divided. The difference in the residual layer, which is the difference between the upper surface height and the average value of the upper surface height of the residual layer in all images, is within a predetermined range. So that the method for producing a sintered ore for adjusting the opening of said split gate in the same position as the remaining fire layer in the divided one image in a width direction of the pallet.
[2] Assuming that the difference between the charging thickness charged by one divided gate and the average value of the charging thicknesses of all the divided gates is the charging thickness difference, the residual layer in the one divided image is The range of the charging thickness difference of the one split gate within which the residual layer difference is within a predetermined range is calculated, and the opening of the one split gate so as to be within the range of the charging thickness difference The method for producing a sintered ore according to [1], wherein
[3] The range of the charging thickness difference calculated in the past in association with the range of the characteristics of the sintered raw material is recorded, and corresponds to the range of the characteristics including the characteristics of the sintered raw material to be charged The method for producing a sintered ore according to [2], wherein the opening of the split gate is adjusted in advance so as to be within the range of the charged thickness difference.

  According to the present invention, since the upper surface height of the afterfire layer observed on the fracture surface of the sintered cake can be controlled to be within a predetermined range, the uneven sintering in the width method of the sintering machine is eliminated. . Thereby, the quality and yield of the product sintered ore can be improved. Furthermore, the productivity of the sintering machine can be increased by improving the quality and yield of the product sintered ore.

It is a figure explaining the shape of an afterfire layer. It is a side surface schematic diagram which shows an example of the sintering machine 10 used for the manufacturing method of the sintered ore concerning this embodiment. 2 is a schematic perspective view of a supply section 30. FIG. It is a figure explaining the manufacturing method of a sintered ore. It is a figure explaining the image analysis in the afterfire layer monitoring system. It is a table | surface which shows an example of the classification | category corresponding to the characteristic of the sintering raw material. The shape of the after-fire layer when evenly charged is shown. The shape of the after-fired layer in the charging layer charged after adjusting by the opening setting value of the division gate 16 for equalizing the upper surface height of the after-fired layer is shown.

  FIG. 2 is a schematic side view showing an example of a sintering machine 10 used in the method for producing a sintered ore according to the present embodiment. In the sintering machine 10, the sintering raw material including iron ore and carbonaceous material is cut out by the roll feeder 14 from the surge hopper 12 provided in the feeding section 30 of the sintering machine 10 and loaded on the endless moving pallet 24. And a charge layer of the sintering raw material is formed. At this time, the thickness of the charging layer (hereinafter sometimes referred to as “charging level”) is controlled by adjusting the opening of the plurality of divided gates 16 installed in the width direction of the pallet 24. The charging layer moves toward the downstream side of the sintering machine 10 after the charging level is measured by the level meter.

  The charging layer is ignited on the upper surface of the charging layer by the ignition furnace 18 installed on the downstream side of the feeding section 30. Furthermore, air is introduced into the charging layer by sucking air downward from the blower 22 through a wind box 20 provided below the pallet 24, and the carbonaceous material contained in the raw material of the sintered ore is Burn. The sintered raw material baked and solidified by the combustion heat generated by the combustion of the carbonaceous material becomes a sintered cake that is a lump of sintered ore and is discharged at the discharge portion 32.

  The sintered cake discharged from the discharge portion 32 is cracked in the pallet width direction of the sintered surface layer portion immediately before dropping from the pallet 24. An afterfire layer is formed on the fracture surface of the sintered cake left on the pallet 24. The excavation part camera 26 images the afterfire layer formed on the fracture surface of the sintered cake. Thereafter, the sintered cake falls from the ore discharge portion 32, is crushed, cooled by a cooler, and sized, for example, into a product sintered ore made of agglomerates of 5.0 mm or more.

  FIG. 3 is a schematic perspective view of the mining unit 30. As described above, the charging level of the charging layer is controlled by adjusting the opening of the plurality of divided gates 16 installed in the width direction of the pallet 24. In the present embodiment, the divided gates 16 are divided into, for example, eight, and gate numbers (1 to 8) are assigned to the divided gates 16 in association with the order of the positions in the width direction on the pallet 24. .

  In the present embodiment, eight level meters 28 are provided, which is the same number as the division number of the division gate 16. One level meter 28 is provided on the downstream side of each division gate. Each level meter 28 is assigned the same number as the gate number, and each level meter 28 measures the loading level of the divided gate 16 to which the same number is assigned. In the present embodiment, an ultrasonic level meter is used as the level meter 28.

FIG. 4 is a diagram for explaining a method for producing a sintered ore. The sintering machine 10 further includes a controller 40, a process controller 42, and a residual layer monitoring system 44. The controller 40 receives an input of a setting value Sv _i (Sv _{1 to} Sv ₈ ) of the charging level of each divided gate 16 from the operator. Controller 40, corresponding to the accepted Sv _i, adjusts the opening degree of each of the split gate 16. Here, i corresponds to the gate number (1 to 8) of the divided gate 16.

As described above, the level meter 28 measures the charging level actual values P _i (P _{1 to} P ₈ ) of the divided gates to which the same number is assigned, and measures the measurement results at predetermined time intervals. The value is output to the controller 40. In this embodiment, the level meter 28 outputs, for example, a charged level actual value P _i to the controller 40 every minute.

When the controller 40 obtains the charging level actual value P _i from the level meter 28, the charging level is the difference between the charging level of each divided gate and the average of all the charging level measured values according to the following formula (1). The input level difference ΔP _i (ΔP _{1 to} ΔP ₈ ) is calculated.

In the above mathematical formula (1), n represents the number of divided gates. In this embodiment, since the number of divisions of the division gate is 8, n is 8. The controller 40 outputs the calculated charging level difference ΔP _i to the process controller 42 every minute, for example. The process controller 42 records ΔP _i output from the controller 40 together with the divided gate number i and the acquired time in a recording device provided in the process controller 42.

  As described above, the ore excavation section camera 26 images the afterglow layer formed on the fracture surface of the sintered cake and outputs image data to the afterglow layer monitoring system 44 at predetermined time intervals. In the present embodiment, the ore excavation section camera 26 outputs image data to the afterfire layer monitoring system 44, for example, every minute. In addition, as the rear camera 26, for example, a digital camera including a CCD or CMOS image sensor may be used, and an infrared thermography camera or the like may be used.

  The afterfire layer monitoring system 44 analyzes the image data acquired from the ore excavation section camera 26. FIG. 5 is a diagram for explaining image analysis in the afterfire layer monitoring system 44. The afterfire layer monitoring system 44 assigns ± 140 coordinates to the left and right in the width direction of the image data, and specifies the coordinates −123 to 102 in the width direction as coordinate areas of the palette. Further, the afterfire layer monitoring system 44 divides the pallet coordinate region of −123 to 102 into eight coordinate regions in association with the order of the positions in the divided gate 16. Each divided coordinate area is assigned the same field number as the gate number assigned to the divided gate at the same position in the width direction of the pallet 24.

  The afterfire layer monitoring system 44 measures the upper surface height of the afterfire layer for each of the eight coordinate regions divided in the left-right direction. For example, the afterglow layer monitoring system 44 identifies a pixel having a luminance higher than a predetermined luminance threshold as the afterglow layer, and identifies a pixel having a luminance smaller than the luminance threshold as not the afterglow layer. Note that the luminance threshold is, for example, the boundary between the luminance of the pixel included in the shape of the afterfire layer in the image data in which the shape of the afterfire layer is specified and the luminance of the pixel not included in the shape of the afterfire layer. May be determined by the brightness. In the present embodiment, since the luminance range of the image data is 0 to 255, the luminance threshold is set to 55. In this case, the afterglow layer management system 44 identifies the pixels in the luminance value range 255 to 55 as the afterglow layer, and identifies the pixels in the luminance value range 54 to 0 as other regions that are not the afterglow layer. .

  The afterglow layer monitoring system 44 assumes that the area composed of the pixels identified as the afterglow layer is the shape of the afterglow layer, and has eight coordinate areas obtained by dividing the upper surface height of the afterglow layer in the left-right direction. Measure every time. The afterfire layer monitoring system 44 calculates, for example, the average value of the top surface height of the afterfire layer in the coordinate area divided into eight as the measurement of the top surface height of the afterfire layer. In addition, the afterfire layer monitoring system 44 may calculate the maximum value of the top surface height in the divided coordinate region as the measurement of the top surface height of the afterfire layer, and may also calculate the top surface height in the divided coordinate region. The minimum value may be calculated.

The afterfire layer monitoring system 44 uses the measured top surface height of the afterfire layer and the following mathematical formula (2) to determine the top surface height of the afterfire layer in the divided coordinate region and the top surface height of the afterfire layer. The afterfire layer difference ΔFi (ΔF _{1 to} ΔF ₈ ), which is the difference from the average value, is calculated.

  In the above mathematical formula (2), n represents the number of divided coordinate areas. In the present embodiment, the number of divisions is 8, which is the same as the number of divisions of the divided gates, so n is 8. In addition, i is a number of divided areas allocated from 1 to 8 for each coordinate area, and represents a divided gate number at the same position in the width direction of the pallet 24.

The afterfire layer monitoring system 44 outputs each ΔF _i to the computer 42, for example, every minute. The process controller 42 records ΔF _i output from the afterfire layer monitoring system 44 in the recording device together with the divided gate number i and the acquired time.

The process control unit 42 associates ΔF _i output from the residual fire layer monitoring system 44 with ΔP _i having the same division gate number in consideration of the movement time of the pallet 24. For example, when the charge layer charged from the supply section 30 is discharged from the discharge section 32 after 30 minutes, the process controller 42 sets ΔF ₁ output from the afterfire layer monitoring system 44 to 30 minutes. It is associated with ΔP ₁ previously output from the controller 40.

Procon 42, the string with the [Delta] F _i as the value of y, plotting the point (ΔF _{i, ΔP i)} on the x-y plane of the [Delta] P _i as the value of x. Procon 42, every time [Delta] F _i is output, plotting the point (ΔF _i, ΔP _i), to create a scatter plot composed of a plurality of points (ΔF _i, ΔP _i).

On the condition that at least two points (ΔF _i , ΔP _i ) are plotted, the process controller 42 calculates a regression line (ΔF _i = ΔP _i × α + β) using the plot. When calculating the regression line, the process controller 42 calculates a value of ΔP _i that satisfies ΔF _i = 0 in the calculated regression line. The value of ΔP _i that satisfies ΔF _i = 0 is hereinafter referred to as ΔP _i-0 . It should be noted that ΔF _i = 0, that is, that the residual flame layer difference is 0 mm is an example within a predetermined range in the residual flame layer difference. In addition, the afterfire layer difference should just be larger than -50 mm and less than +50 mm with respect to the average value of the upper surface height of a remaining fire layer. If the residual layer difference is less than the average value of −50 mm or exceeds +50 mm, the sintering of the lower portion of the residual layer is not completely completed, which may adversely affect the quality of the sintered ore and the yield of the sintered ore. When the range of the afterfire layer difference is set to be greater than −50 mm and less than +50 mm with respect to the average value of the top surface height of the afterfire layer, the range of ΔP _i calculated by the process controller 42 is ΔF _i = −50 in the regression line. the range and the from [Delta] P _i which is calculated when to [Delta] P _i of calculated when the ΔF i _{= +} 50.

The process controller 42 outputs the calculated ΔP _i-0 to the controller 40. The controller 40 reflects the acquired ΔP _i−0 in the charging level setting value Sv _i of each divided gate 16. Thereby, the controller 40 can obtain the opening setting value of the divided gate for making the upper surface height of the after-fired layer uniform. And the controller 40 can equalize the upper surface height of a residual fire layer by adjusting the opening of the division | segmentation gate 16 corresponding to the said opening setting value.

In the above description, the controller 40 has been described as acquiring ΔP _i−0 from the process control 42 and reflecting it in the charging level setting value Sv _i of the divided gate 16. However, the controller 40 acquires the acquired ΔP _{i. -0} may be displayed by display means provided separately. Then, the operator may change the charging level setting value Sv _i with reference to ΔP _i-0 displayed by the display means.

  Further, the controller 40 may receive the characteristics of the raw material to be charged and adjust the opening setting values of all the divided gates in advance based on the characteristics of the raw material. FIG. 6 is a table showing an example of classification corresponding to the characteristics of the sintered raw material. In addition, in FIG. 6, CR represents the mass% of the coke with respect to a sintering raw material. In addition, the sintering raw materials for calculating CR are iron ore powder, iron mill recovered powder, sintered ore sieving powder, CaO-containing raw materials such as limestone and dolomide, granulation aids such as quick lime, and powdered coke and anthracite Of carbonaceous materials (solid fuel).

In the example shown in FIG. 6, the controller 40 receives inputs of the coke ratio, moisture content, and quick lime content of the sintering raw material from the operator. The controller 40 specifies the classification number of the sintering raw material corresponding to the range including the received coke ratio, moisture content, and quicklime content. For example, when the coke ratio of the raw material to be charged is 3.7%, the quick lime is 2%, and the moisture content is 6.5%, the controller 40 determines the classification number of the raw material to be charged. Specify “11”. The controller 40 outputs the identified classification number to the computer 42 together with ΔP _i .

The process control 42 calculates the regression line as described above, and calculates ΔP _i−0 where ΔF _i = 0 in the calculated regression line. The process control 42 records the calculated ΔP _i-0 in association with the classification number of the sintering raw material. When calculating ΔP _{i-0 associated} with the classification number of the same sintering raw material, the process controller 42 deletes the old ΔP _i-0 and updates it to the newly calculated ΔP _i-0 value. . In this way, a new value of ΔP _i-0 is recorded in the process control 42 in association with the classification of the sintering raw material in FIG.

When the sinter 10 is used to newly start the production of sintered ore, if the charge layer charged from the supply section 30 is discharged from the discharge section 32 after 30 minutes, it is divided. The opening setting value of the gate 16 is obtained after 30 minutes. On the other hand, if the past ΔP _i-0 corresponding to the classification number of the sintering raw material is recorded in the process control 42, the process control 42 uses the classification number of the sintering raw material output from the controller 40 to ΔP _{i-0 associated} with the classification number of the raw material can be output to the controller 40. Then, the controller 40, the [Delta] P _i-0 obtained, by reflecting the charged level setting value Sv _i of each of the divided gate 16, without waiting for 30 minutes, to equalize the upper surface height of the remaining fire layer Therefore, the opening setting value of the divided gate can be obtained.

In the example shown in FIG. 6, the sintering raw materials are classified according to the coke ratio, the amount of quicklime, and the amount of moisture. However, the sintering raw material is not limited to this, and other characteristics that can affect the sintering rate of the sintered ore are used. The binding material may be classified. In addition, when a part of the value of ΔP _i-0 corresponding to the classification number of the sintering raw material in FIG. 6 is not recorded in the process control 42, the process control 42 has a part of ΔP _i− which is not recorded. a value of ₀ may be calculated from the recorded values of [Delta] P _i-0 for another class number. In this case, the process controller 42 uses a sintering raw material such as “lowering the charging level when the coke ratio increases” or “lowering the charging level when the amount of moisture increases” or “increasing the charging level when the amount of quick lime increases”. Based on the change tendency of the charging level corresponding to the characteristic change, the value of ΔP _i−0 is calculated. The calculation of ΔP _i-0 based on the change tendency of the charging level may be performed by recording ΔP _i-0 calculated by the operator in the computer 42.

  The sintered ore was manufactured using the sintering machine provided with the same 8 divided gates as the sintering machine 10 shown in FIGS. First, the charging level set value SV was set so that the charging level was uniform in the pallet width direction, and the raw material for sintering was charged onto the pallet to form a charging layer.

The controller 40 acquires the charging level actual value P _i (1 to 8) for each divided gate measured by the eight level meters 28, and obtains the respective layer insertion level differences ΔP _i (ΔP _{1 to} ΔP ₈ ). Calculated. The controller 40 outputs the calculated charging level difference ΔP _i to the process controller. The controller 40 repeats the above and continuously outputs a plurality of charging level differences ΔP _i to the process controller.

  In the exhausting part of the sintering machine, the afterfire layer formed on the fracture surface of the sintered cake is imaged by the exhausting part camera 26 provided at the rear position of the exhausting part, and image data of the afterfire layer is obtained. Output to the afterfire layer monitoring system 44. FIG. 7 shows the shape of the after-fire layer when uniformly charged. Thus, even if the charging level of the charging layer was made equal, the upper surface height of the after-fired layer became a shape that descended to the lower right. In this way, even if the charging level is equal, the upper surface height of the after-fire layer is not uniform. For example, partial air leakage occurs in the wind box 20, and the negative suction pressure of air is constant in the pallet width direction. Possible causes such as not becoming.

The afterfire layer monitoring system 44 calculated the afterfire layer difference ΔF _i (ΔF _{1 to} ΔF ₈ ) corresponding to the divided gate number using the acquired image data. Remaining fire layer monitoring system 44 outputs the calculated remaining fire layer difference [Delta] F _i to process computer 42. Remaining fire layer monitoring system 44 repeats the above was continuously outputs a plurality of loading level difference [Delta] F _i to process computer.

The process controller 42 associates ΔF _i output from the afterfire layer monitoring system 44 with ΔP ₁ output from the controller 40 30 minutes ago. The process control 42 calculated a regression line using the two points when two points could be plotted in each divided gate number. The process control 42 calculated ΔP _i−0 where ΔF _i = 0 where the afterfire layer becomes uniform in the calculated regression line.

The process controller 42 outputs the calculated ΔP _i-0 to the controller 40. The controller 40 reflects the acquired ΔP _i−0 in the charging level setting value Sv _i of each divided gate 16. Thereby, the controller 40 was able to obtain the opening setting value of the divided gate for making the upper surface height of the afterfire layer uniform.

FIG. 8 shows the shape of the afterglow layer in the charging layer charged after being adjusted by the opening setting value of the divided gate 16 for making the upper surface height of the afterglow layer uniform. As shown in FIG. 8, the height of the upper surface of the afterfire layer could be made nearly uniform. From these results, the charge level by the split gate 16 in the feed section 30 at the same position in the width direction of the pallet is associated with the upper surface height of the residual fire layer observed in the discharge section 32, and the residual fire. ΔP _i-0 where the upper surface height of the layer is uniform is calculated. Then, by reflecting the [Delta] P _i-0 to charging level setting value Sv _i of each split gate 16, is adjusted opening of the split gate 16, loading level of the sintering material is prepared from split gate 16 Is done. Thus, the charging level of the sintering raw material was adjusted, and by implementing the present invention, the upper surface height of the after-fired layer in the charging layer could be made uniform.

  And by this, the product loss part (powder rate) of the sintered ore before applying this invention (the ratio (mass%) where the particle size after crushing in the exhausted part is 4 mm or less) is 10.3%. . On the other hand, the product loss of the sintered ore after applying the present invention was 9.8%, confirming an improvement of 0.5%.

DESCRIPTION OF SYMBOLS 10 Sintering machine 12 Surge hopper 14 Roll feeder 16 Divided gate 18 Ignition furnace 20 Wind box 22 Blower 24 Pallet 26 Exhaust part camera 28 Level meter 30 Mining part 32 Exhaust part 40 Controller 42 Procon 44 Residual layer monitoring system

Claims (3)

Ignition furnace installed on the downstream side of the above-mentioned mining unit by forming a charging layer by charging sintered raw materials including fine ore and charcoal on an endless moving pallet in the feeding unit of the sintering machine Then, the upper surface of the charging layer is ignited, air is sucked and introduced into the charging layer by a wind box disposed below the pallet, the carbonaceous material is burned, and the sintering raw material is sintered and sintered. In the method for producing a sintered ore after obtaining a sintered cake, the sintered cake is crushed at the discharge portion to obtain a product sintered ore,
Corresponding images of the afterglow layer obtained by imaging the afterglow layer observed on the sintered cake fracture surface of the waste mining part in the order of the position in the width direction of the divided gate divided in the width direction of the pallet The difference in the residual layer, which is the difference between the upper surface height of the residual layer in one divided image and the average height of the upper surface of the residual layer in all the images, is within a predetermined range. The manufacturing method of the sintered ore which adjusts the opening degree of the said division | segmentation gate of the same position in the width direction of the after-fired layer and the said pallet in the said one divided image.   If the difference between the charging thickness charged by one divided gate and the average value of the charging thicknesses of all the divided gates is defined as the charging thickness difference, the residual layer of the residual layer in the divided one image The range of the charging thickness difference of the one split gate that is within a predetermined range is calculated, and the opening of the one split gate is adjusted so as to be within the range of the charging thickness difference. The manufacturing method of the sintered ore of Claim 1.   The range of the charging thickness difference calculated in the past in association with the range of the characteristics of the sintered raw material is recorded, and the range corresponding to the range of the characteristics including the characteristics of the sintered raw material to be charged The method for producing a sintered ore according to claim 2, wherein the opening of the divided gate is adjusted in advance so as to be within a range of a charging thickness difference.