JP4998670B2 - Sizing ore sizing method and rocking classifier used therefor - Google Patents

Description

  The present invention relates to a sinter ore sizing method for adjusting the particle size (sizing) to a sinter having an appropriate particle size as a blast furnace raw material by crushing and classifying the fired sinter ore, and the shaking used at that time. It relates to a dynamic classifier.

  A conventional sinter ore sizing method is shown in FIG. The sintered ore fired on the sinter 1 with a pallet of about 5 m × 1 m is roughly crushed to a size of about 200 mm by the primary crusher 2. The coarsely crushed sintered ore is cooled by the cooler 3 and then sieved by a first stage sieve 55 having a screen of about 100 mm. The massive sintered ore having a size of more than 100 mm that has been sieved on the sieve by the first stage sieve 55 is supplied to the secondary crusher 4 and crushed with a target of about 50 mm. The sintered ore crushed by the secondary crusher 4 merges with the lower sieve of the first stage sieve 55 and is supplied to the second stage sieve 56. Then, the screens of the second screen 56, the third screen 57, the fourth screen 58, and the screen are sequentially reduced, and 5 mm to 100 mm, which is an appropriate particle size as a blast furnace raw material, on the screens of the respective screens 56 to 58. The sinter having a particle size of 5 mm to 100 mm is supplied to the blast furnace 10 as a product. Note that the sintered ore having a particle size of 5 mm or less (hereinafter referred to as pulverized ore) generated during the crushing and classification is recovered as a sieve under the fourth-stage sieve 58 and is again used as a sintering material as a sintering machine. Returned to 1

  And, as the primary crusher 2, a single spike roll crusher in which a claw-like crusher called a demon tooth is provided on one roll is used, and the secondary crusher 4 is opposed to the primary crusher 2. A double roll crusher is used in which teeth that mesh with each other are provided on two rolls. In addition, a vibrating sieve having an amplitude of several millimeters is used for each of the first-stage sieve 55 to the fourth-stage sieve 58 serving as a classifier.

  A problem in the conventional sinter ore sizing method as described above is that the generation ratio (pulverization rate) of the pulverized ore to the baked sintered ore is considerably large. It has reached ~ 30%. The fact that there are many pulverized ores that are inappropriate as blast furnace raw materials and returned to the sintering machine means that productivity of the sinter ore sizing process is reduced and excess energy is consumed. Therefore, it is important to reduce the powdering rate in the sizing process.

  One of the reasons for the high pulverization rate in the sinter ore sizing process is that multiple-stage vibrating sieves are used to classify a large amount of sintered ore. There is a problem that pulverized ore is generated by pulverizing due to a transport drop while transferring the sieve.

  In view of this, several techniques have been proposed that attempt to reduce the powdering rate in the sizing process by improving the classification process using a vibrating sieve.

  For example, in Patent Document 1, by using a primary vibrating sieve arranged upstream of a crusher, an intermediate-sized sintered ore that is easily pulverized is collected in advance to reduce the load on the secondary vibrating sieve. A technique for improving classification efficiency and reducing the pulverization rate is disclosed.

  Further, in Patent Document 2, by reducing the sieve area of the second stage vibrating sieve arranged downstream of the crusher and reducing the supply amount to the third stage vibrating sieve, A technique that attempts to suppress the generation of pulverized ore is disclosed.

  However, in any of the techniques described in Patent Document 1 or Patent Document 2, in any case, a multi-stage vibrating sieve is used as a classifier, and thus the sintered ore transfers the multi-stage vibrating sieve. The problem that pulverized ore is generated by pulverizing due to a transport drop in the meantime is inevitable.

  Therefore, in order to solve the above problem, the present applicant has proposed a new sinter ore sizing method in Japanese Patent Application No. 2005-342274 (unpublished application 1).

  That is, FIG. 7 shows the processing flow diagram, and FIG. 8 shows the swing type classifier used at that time. Peristaltic motion that reciprocates in the up and down direction and the tilt direction so as to feed the second screen 16 having an eye size, and the first screen 15 and the sintered ore on the second screen 16 downwardly tilted. Has been crushed by the secondary crusher 4 using the oscillating classifier 8 provided with the eccentric drive mechanism 17 for causing the first screen 15 and the second screen 16 to perform the movement, and has been conveyed by the conveyor 20 By putting the sintered ore on the first screen 15, the sintered ore (pulverized ore) having a particle size smaller than 5 mm is classified under the sieve of the first screen 15, and particles having a size of 5 to 100 mm are obtained. Of the sintered ore (suitable grains) is classified under the sieve of the second screen 16, and the sintered ore (coarse grains) having a particle size larger than 100 mm is classified on the sieve of the second screen 16. A sizing method is proposed.

  In the sinter ore sizing method described in the unpublished application 1, using a rocking classifier 8 equipped with screens having two different sieve sizes, the pulverized ore, appropriate grains, and coarse grains at a time. Therefore, the generation of pulverized ore due to a drop in transport while transferring multiple classifiers (vibrating sieves) as in the past is suppressed, and the pulverization rate is reduced. be able to.

  Usually, as the classification screen, a mesh screen knitted fine lines so as to have a mesh of a predetermined size, a punching screen punched flat plate to have holes of a predetermined size, Bar screens having a predetermined size gap by arranging bar members (bars) in parallel at predetermined intervals are selectively used based on their advantages and disadvantages.

  A mesh screen having a small mesh size can be easily manufactured, but since a fine wire having a wire diameter of 2 to 3 mm is used, the durability is somewhat inferior. Although the punched screen is durable, the ratio (opening ratio) of the total area of the air holes to the entire area of the screen is small, and the classification efficiency is slightly inferior. The bar screen is durable, but it is difficult to manufacture a bar screen with a small gap between the bars.

  Therefore, in the above sizing method, a mesh screen is used for the first screen 15 having a small mesh size, and any screen is used for the second screen 16 having a large mesh size.

Incidentally, here, the mesh of the mesh screen, the holes of the punched screen, and the gap between the bars of the bar screen are collectively referred to as “sieving mesh”, and the size thereof is called “sieving size”.
Japanese Patent Laid-Open No. 6-279872 JP 2001-181714 A

  In the case of classifying using a classifier equipped with a plurality of screens having different screen sizes, as in the method of sinter ore sizing described in the aforementioned unpublished application 1, it was crushed by a secondary crusher. Since all of the sintered ore is charged on a specific screen (for example, the first screen) and then sequentially classified, the processing capacity (classification efficiency) is restricted. In addition, since a load is concentrated on a specific screen (for example, the first screen), particularly when a mesh screen having a relatively low durability is used, the wear of the screen rapidly progresses, and in a short period of time. There is a problem that it needs to be replaced.

  The present invention has been made in view of the circumstances as described above. When the sintered ore is crushed and classified to adjust the particle size to a sintered ore having an appropriate particle size as a blast furnace raw material, An object of the present invention is to provide a sinter ore sizing method that can suppress generation and reduce the pulverization rate more efficiently, and a rocking classifier suitable for use in the method. .

  In order to solve the above problems, the present invention has the following features.

[1] In a sinter ore sizing method for adjusting the particle size to a sintered ore having a predetermined particle size range by crushing and classifying the sintered ore, the bar or screen is crushed. A receiving screen for receiving the sintered ore, and a plurality of screens having different mesh sizes arranged in order of the mesh size from the upper side in a slanting direction below the receiving screen . Using a classifier in which the receiving screen is arranged directly above a small screen , first, preliminary classification is performed by the receiving screen, and then classification is sequentially performed by a plurality of screens having different mesh sizes. Sizing method of sintered ore.

  [2] The sinter ore sizing method according to [1], wherein a sintered ore having a particle size larger than a predetermined particle size is crushed again and supplied to the classifier again.

  [3] As the classifier, a receiving screen that receives the crushed sintered ore, a plurality of screens that are inclined below the receiving screen and are arranged in order of the mesh size, and the mesh size A peristaltic drive mechanism for causing each screen to perform a peristaltic motion that reciprocates in the vertical direction and the slant direction so as to feed the classification target on a plurality of different screens in a slanting downward direction. The method according to [1] or [2] above, wherein a sizing ore classifier is used.

[ 4 ] A receiving screen that is a bar screen or a punching screen and receives the crushed sintered ore, and a plurality of screens that are inclined downward from the receiving screen and arranged in series in order of the mesh size from above. And the receiving screen is disposed directly above the smallest screen among the plurality of screens, and the classification target on the plurality of screens having different sieve mesh sizes is fed downwardly inclined. A peristaltic classifier provided with an eccentric drive mechanism for causing each screen to perform a peristaltic motion that reciprocates in the vertical direction and the tilt direction.

  In the present invention, since the sintered ore is sequentially classified using a classifier in which a plurality of screens having different sieve sizes are arranged in the order of the sieve sizes, the sintered ore is classified into a large number of particle size ranges at a time. Therefore, it is possible to suppress the generation of pulverized ore due to a transport drop as in the prior art, and to reduce the pulverization rate. At that time, since the classification is performed in advance by the receiving screen, the processing capacity (classification efficiency) can be greatly improved. In addition, by performing preliminary classification using the receiving screen, it is possible to avoid intensive load on a specific screen, so that even when using a mesh screen with relatively low durability, screen wear is reduced. Can be suppressed.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a process flow diagram in a sinter ore sizing method according to the first embodiment of the present invention, and FIG. 2 is an explanatory view of an oscillating classifier used at that time.

  In this embodiment, as shown in FIG. 1, the sintered ore fired with a pallet of about 5 m × 1 m in the sintering machine 1 is roughly crushed to a size of about 200 mm by the primary crushing machine 2. The The coarsely crushed sintered ore is cooled by the cooler 3 and then supplied to the secondary crusher 4 to be crushed to a size of about 100 mm. The sintered ore crushed by the secondary crusher 4 is supplied to the swing classifier 9A. In the swing classifier 9A, a sintered ore (product) having a particle size suitable for a blast furnace raw material (product size) and a sintered ore having a particle size smaller than the lower limit (5 mm) of the appropriate particle size range are used. (Powdered ore) is classified as under sieve, and sintered ore (coarse) having a particle size larger than the upper limit (100 mm) of the appropriate particle size range is classified on the sieve. Thereafter, the classified sintered ore (product) having a particle size of 5 mm to 100 mm is supplied to the blast furnace 10. Moreover, the sintered ore (pulverized ore) having a particle size smaller than 5 mm is collected and returned again to the sintering machine 1 as a sintering raw material. Further, the sintered ore (coarse particles) having a particle size larger than 100 mm is crushed again by the secondary crusher 4 and then supplied to the swing classifier 9A again.

  As shown in FIG. 2, the swing classifier 9A used in this embodiment includes a first screen 15 and a second screen 16 that are inclined in the chamber 14 and arranged in series from above. The screen size of the first screen 15 is the lower limit value of 5 mm of the predetermined particle size range, and the screen size of the second screen 16 is the upper limit value of 100 mm of the predetermined particle size range. Further, the first screen 15 and the second screen 16 are fed downwardly with respect to the sintered ore on the first screen 15 and the second screen 16 by an eccentric drive mechanism 17 such as a crank mechanism or a planetary gear. A swinging motion that reciprocates in the vertical direction and the tilt direction is performed. As a result, the amplitude can be increased as compared with existing vibrating sieves, and the repulsive force can be applied to the sintered ore to increase the classification efficiency.

  And, this embodiment is different from the unpublished application 1 in that a receiving screen 21 is provided immediately above the first screen 15 for receiving the charged sintered ore and preliminarily classifying it. Is a point. The mesh size of the receiving screen 21 is an intermediate mesh size between the mesh size of the first screen 15 (5 mm) and the mesh size of the second screen 16 (100 mm), and is 30 mm here.

  Incidentally, since all of the sintered ore transported from the secondary crusher 4 by the transport conveyor 20 is put on the receiving screen 21, from the viewpoint of durability, a bar screen or a punched screen should be used. Is preferred.

  Further, in this embodiment, the width direction dispersion input mechanism 19 is provided obliquely above the receiving screen 21. As a result, the sintered ore transported from the secondary crusher 4 by the transport conveyor 20 is dispersed in the screen width direction and is put on the receiving screen 21.

  When sintered ore is supplied from the secondary crusher 4 to such a swinging classifier 9A, classification is performed as follows.

  First, the sintered ore supplied from the secondary crusher 4 is preliminarily classified by the receiving screen 21, and the sintered ore having a particle size smaller than 30 mm, which is under the sieve, is supplied to the first screen 15. Sintered ore having a particle size larger than 30 mm on the sieve is supplied to the second screen 16.

  The sintered ore having a particle size smaller than 30 mm supplied from the receiving screen 21 to the first screen 15 is classified by the first screen 15 so that the sintered ore (pulverized ore) having a particle size smaller than 5 mm is below the sieve. The sintered ore having a particle size of 5 mm to 30 mm is sent to the second screen 16.

  The sintered ore having a particle size of 5 to 30 mm sent from the first screen 15 to the second screen 16 and the sintered ore having a particle size larger than 30 mm supplied from the receiving screen 21 to the second screen 16 are the second By the classification by the screen 16, sintered ore (appropriate grains) having a particle size of 5 mm to 100 mm is recovered under the sieve, and sintered ore (coarse particles) having a particle size larger than 100 mm is recovered on the sieve.

  Thereafter, as described above, the sintered ore having a particle size of 5 mm to 100 mm is supplied as a product to the blast furnace 10, and the sintered ore having a particle size smaller than 5 mm (pulverized ore) is again supplied to the sintering machine 1 as a sintering raw material. Returned ore. Further, sintered ore (coarse particles) having a particle size larger than 100 mm is crushed again by the secondary crusher 4 and then supplied to the swing classifier 9A again.

  In this embodiment, an inclined surface is provided on the entry side of the secondary crusher 4 so that the sintered ore sent from the cooler 3 can be smoothly introduced between the crushing rolls, and the inclined surface is sintered. A dispersion charging mechanism 18 having an inclination for dispersing the ore in the crushing roll width direction is provided.

  As described above, in this embodiment, the sinter is sequentially classified using the swing classifier 9A in which the first screen 15 and the second screen 16 having different sieve sizes are arranged. Since sintered ore can be classified into three types: pulverized ore, appropriate grains, and coarse grains at a time, the generation of pulverized ores due to transport drop as in the prior art is suppressed, and the pulverization rate is reduced. Can be achieved. At that time, the sintered ore supplied from the secondary crusher 4 is put into the receiving screen 2 and preliminarily classified by the receiving screen 21, and then the first screen 15 and the second screen 16. Since the supply is performed, the processing capacity (classification efficiency) is greatly improved as compared with the case where all of the sintered ore supplied from the secondary crusher 4 is put into the first screen 15. Further, by performing preliminary classification using the receiving screen 21, it is possible to avoid a intensive load on the first screen 15, so that even when a mesh screen is used for the first screen 15, the screen is worn out. Is suppressed. In addition, since the width-direction dispersion input mechanism 19 is provided, classification can be performed using the entire screen width, classification efficiency is further improved, and local wear of the screen is prevented.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a process flow diagram in the sinter ore sizing method according to the second embodiment of the present invention, and FIG. 4 is an explanatory diagram of the swing classifier used in that case.

  This second embodiment is a method for regulating the sintered ore according to the first embodiment described above. Among the sintered ore having a particle size of 5 mm to 100 mm suitable for the blast furnace raw material, The ore is extracted and supplied to the sintering machine 1 as a floor covering to be spread on the floor of the pallet of the sintering machine 1. Therefore, in this embodiment, the sintered ore having a particle size of 5 mm to 8 mm and the sintered ore having a particle size of 15 mm to 100 mm are supplied to the blast furnace 10 as products. In addition, sintered ore (pulverized ore) having a particle size smaller than 5 mm is returned again to the sintering machine 1 as a sintering raw material, and sintered ore having a particle size of 8 mm to 15 mm is supplied to the sintering machine 1 as a bedstone ore. Is done. Further, the sintered ore (coarse particles) having a particle size larger than 100 mm is crushed again by the secondary crusher 4 and then supplied to the swing classifier 9 again.

  The swing classifier 9B used in this embodiment is substantially the same as the swing classifier 9A used in the first embodiment, but the first screen 15 having a mesh size of 5 mm. The third screen 22 having a sieve size of 8 mm and the fourth screen 23 having a sieve size of 15 mm are arranged between the second screen 16 having a sieve size of 100 mm. That is, four screens having different sieve dimensions are arranged in the order of the sieve dimensions. A receiving screen 21 having a mesh size of 30 mm is disposed so as to cover the first screen 15, the third screen 22, and the fourth screen 23.

  When the sintered ore is supplied from the secondary crusher 4 to such an oscillating classifier 9B, classification is performed as follows.

  First, the sintered ore supplied from the secondary crusher 4 is preliminarily classified by the receiving screen 21, and the sintered ore having a particle size smaller than 30 mm, which is under the sieve, is supplied to the first screen 15. A sintered ore having a particle size of more than 30 mm on the sieve is directly supplied to the second screen 16.

  The sintered ore having a particle size smaller than 30 mm supplied from the receiving screen 21 to the first screen 15 is classified by the first screen 15 so that the sintered ore (pulverized ore) having a particle size smaller than 5 mm is below the sieve. The sintered ore having a particle size of 5 mm to 30 mm is sent to the third screen 22.

  The sintered ore having a particle size of 5 mm to 30 mm sent from the first screen 15 to the third screen 22 is recovered under the sieve by the classification by the third screen 22. The sintered ore having a particle size of 8 mm to 30 mm is sent to the fourth screen 23.

  The sintered ore having a particle size of 8 mm to 30 mm sent from the third screen 22 to the fourth screen 23 is recovered by the classification by the fourth screen 23 under the sieve. The sintered ore having a particle size of 15 mm to 30 mm is sent to the second screen 16.

  The sintered ore having a particle size of 15 to 30 mm sent from the fourth screen 23 to the second screen 16 and the sintered ore having a particle size larger than 30 mm directly supplied from the receiving screen 21 to the second screen 16 are By the classification using the two screens 16, sintered ore having a particle size of 15 mm to 100 mm is recovered under the sieve, and sintered ore having a particle size larger than 100 mm is recovered on the sieve.

  Thereafter, as described above, a sintered ore having a particle size of 5 mm to 8 mm and a sintered ore having a particle size of 15 mm to 100 mm are supplied to the blast furnace 10 as products. In addition, sintered ore (pulverized ore) having a particle size smaller than 5 mm is returned again to the sintering machine 1 as a sintering raw material, and sintered ore having a particle size of 8 mm to 15 mm is supplied to the sintering machine 1 as a bedstone ore. Is done. Further, the sintered ore (coarse particles) having a particle size larger than 100 mm is crushed again by the secondary crusher 4 and then supplied to the swing classifier 9 again.

  Thus, also in this embodiment, the swing classifier 9B in which the first screen 15, the third screen 22, the fourth screen 23, and the second screen 16 having different sieve dimensions are arranged in the order of the sieve dimensions is used. In addition, since the sintered ore is classified sequentially, the sintered ore can be classified into four types of pulverized ore, product, floor covering, and coarse particles at the same time. Generation | occurrence | production of the pulverization ore by a head can be suppressed, and reduction of a pulverization rate can be aimed at. At that time, the sintered ore supplied from the secondary crusher 4 is put into the receiving screen 2 and preliminarily classified by the receiving screen 21, and then the first screen 15 and the second screen 16. Since the supply is performed, the processing capacity (classification efficiency) is greatly improved as compared with the case where all of the sintered ore supplied from the secondary crusher 4 is put into the first screen 15. Further, by performing preliminary classification using the receiving screen 21, it is possible to avoid a intensive load on the first screen 15, so that even when a mesh screen is used for the first screen 15, the screen is worn out. Is suppressed.

(Third embodiment)
A third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a process flow diagram in the sinter ore sizing method according to the third embodiment of the present invention, and FIG. 6 is an explanatory diagram of the swing classifier used at that time.

  This third embodiment is similar to the sinter ore sizing method according to the second embodiment described above. Of the sintered ore having a particle size of 5 mm to 100 mm suitable for the blast furnace raw material, a particle size of 8 mm to 15 mm is used. The sintered ore is extracted and supplied to the sintering machine 1 as a flooring ore that is spread on the pallet floor of the sintering machine 1. Therefore, also in this embodiment, sintered ore having a particle size of 5 mm to 8 mm and sintered ore having a particle size of 15 mm to 100 mm are supplied to the blast furnace 10 as products. In addition, sintered ore (pulverized ore) having a particle size smaller than 5 mm is returned again to the sintering machine 1 as a sintering raw material, and sintered ore having a particle size of 8 mm to 15 mm is supplied to the sintering machine 1 as a bedstone ore. Is done.

  In this embodiment, the interval between two opposing rolls of the secondary crusher 4 is narrowed so that sintered ore having a particle size larger than 100 mm is not supplied to the swing classifier.

  The swing classifier 9C used in this embodiment is substantially the same as the swing classifier 9B used in the second embodiment, but the second screen 16 having a sieve size of 100 mm. The difference is that is not arranged. That is, the first screen 15 having a screen size of 5 mm, the third screen 22 having a screen size of 8 mm, and the fourth screen 23 having a screen size of 15 mm are arranged in the screen size order. In addition, a receiving screen 21 having a mesh size of 30 mm is disposed so as to cover the first screen 15 and the third screen 22.

  When sintered ore is supplied from the secondary crusher 4 to such a swing classifier 9C, classification is performed as follows.

  First, the sintered ore supplied from the secondary crusher 4 is preliminarily classified by the receiving screen 21, and the sintered ore having a particle size smaller than 30 mm, which is under the sieve, is supplied to the first screen 15. A sintered ore having a particle size of more than 30 mm on the sieve is directly supplied to the fourth screen 23.

  The sintered ore having a particle size smaller than 30 mm supplied from the receiving screen 21 to the first screen 15 is classified by the first screen 15 so that the sintered ore (pulverized ore) having a particle size smaller than 5 mm is below the sieve. The sintered ore having a particle size of 5 mm to 30 mm is sent to the third screen 22.

  The sintered ore having a particle size of 5 mm to 30 mm sent from the first screen 15 to the third screen 22 is recovered under the sieve by the classification by the third screen 22. The sintered ore having a particle size of 8 mm to 30 mm is sent to the fourth screen 23.

  The sintered ore having a particle size of 8 to 30 mm sent from the third screen 22 to the fourth screen 23 and the sintered ore having a particle size larger than 30 mm directly supplied from the receiving screen 21 to the fourth screen 24 are By classification using the four screens 23, sintered ore having a particle size of 8 mm to 15 mm is collected under the sieve, and sintered ore having a particle size of 15 mm to 100 mm is collected on the sieve.

  Thereafter, as described above, a sintered ore having a particle size of 5 mm to 8 mm and a sintered ore having a particle size of 15 mm to 100 mm are supplied to the blast furnace 10 as products. In addition, sintered ore (pulverized ore) having a particle size smaller than 5 mm is returned again to the sintering machine 1 as a sintering raw material, and sintered ore having a particle size of 8 mm to 15 mm is supplied to the sintering machine 1 as a bedstone ore. Is done.

  Thus, also in this embodiment, using the swing classifier 9C in which the first screen 15, the third screen 22, and the fourth screen 23 having different sieve dimensions are arranged in order of the sieve dimensions, Since the sinter can be classified into three types: pulverized ore, product, and bedbed ore at the same time, the generation of pulverized ore due to a transport drop as in the prior art can be achieved. It can suppress and can reduce the pulverization rate. At that time, the sintered ore supplied from the secondary crusher 4 is put into the receiving screen 2 and preliminarily classified by the receiving screen 21, and then the first screen 15 and the fourth screen 23. Since the supply is performed, the processing capacity (classification efficiency) is greatly improved as compared with the case where all of the sintered ore supplied from the secondary crusher 4 is put into the first screen 15. Further, by performing preliminary classification using the receiving screen 21, it is possible to avoid a intensive load on the first screen 15, so that even when a mesh screen is used for the first screen 15, the screen is worn out. Is suppressed.

It is a processing flow figure in a 1st embodiment of the present invention. It is explanatory drawing of the rocking classifier used in the 1st Embodiment of this invention. It is a processing flowchart in the 2nd Embodiment of this invention. It is explanatory drawing of the rocking classifier used in the 2nd Embodiment of this invention. It is a processing flow figure in a 3rd embodiment of the present invention. It is explanatory drawing of the rocking classifier used in the 3rd Embodiment of this invention. It is a processing flow figure of Japanese Patent Application No. 2005-342274. It is explanatory drawing of the rocking | swiveling classifier of Japanese Patent Application No. 2005-342274. It is a processing flow figure in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sintering machine 2 Primary crusher 3 Cooling machine 4 Secondary crusher 8 Oscillating classifier 9A Oscillating classifier 9B Oscillating classifier 9C Oscillating classifier 10 Blast furnace 14 Chamber 15 1st screen 16 1st Two screens 17 Eccentric drive mechanism 18 Dispersion throwing mechanism 19 Width direction dispersion throwing mechanism 20 Conveyor 54 Secondary crusher 55 First stage sieve 56 Second stage sieve 57 Third stage sieve 58 Fourth stage sieve

Claims (4)

In the sinter ore sizing method for adjusting the particle size to a sintered ore in a predetermined particle size range by crushing and classifying the sintered sinter, the sintered crushed sintered bar bar or punched screen A receiving screen for receiving the ore, and a plurality of screens having different mesh sizes arranged in series in order of the mesh size from the top to the bottom of the receiving screen, and having the smallest screen among the plurality of screens Sintered ore characterized by using a classifier having the receiving screen disposed directly above , firstly preliminarily classified by the receiving screen, and then sequentially classified by a plurality of screens having different sieve mesh sizes. Sizing method.   2. The method according to claim 1, wherein a sintered ore having a particle size larger than a predetermined particle size is crushed again and supplied to the classifier again.   As the classifier, a receiving screen that receives the crushed sintered ore, a plurality of screens that are inclined below the receiving screen and are arranged in order of the screen size, and a plurality of screens having different screen sizes Peristaltic classifier equipped with an eccentric drive mechanism for causing each screen to perform a peristaltic motion that reciprocates in the vertical direction and the slanting direction so as to feed the classifying object on the screen in the slanting downward direction The sinter ore sizing method according to claim 1 or 2, wherein the sinter is used. A receiving screen that is a bar screen or a punching screen and receives the crushed sintered ore, and a plurality of screens that are inclined downward from the receiving screen and arranged in series from the top in order of the mesh size , The receiving screen is arranged directly above the smallest screen among the plurality of screens, and the vertical direction is applied so that the classification target on the plurality of screens having different sieve dimensions is inclined downward. A peristaltic classifier provided with an eccentric drive mechanism for causing each screen to perform a peristaltic motion that reciprocates in the tilt direction.

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