A sintering machine and a method for increasing the sintering speed

Abstract

The present invention discloses a sintering machine and a method for increasing the sintering speed. By adding heat conduction rods on the basis of the existing process, the problem that the sintering air permeability is affected by the combustion layer and the over-wet layer in the past, thus affecting the sintering production efficiency, is solved. The arrangement of heat conduction rods with high thermal conductivity changes the original heat transfer mode, destroys the high-temperature combustion layer and the over-wet layer that limit the air permeability of the material layer, strengthens the downward heat transfer, improves the air permeability at the same time, and speeds up the sintering speed.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering, and particularly relates to a sintering machine and a method for improving the sintering speed. Background Art

[0002] Sintered ore is the main iron-containing raw material in the ironmaking process of iron and steel enterprises, accounting for about 70%. The sintering process not only produces sintered ore for ironmaking, but also treats various iron-containing dusts and sludge and other waste materials of iron and steel enterprises. Sintering is to proportionally add and mix various powdered iron-containing raw materials with fuel, flux and water, mix and granulate on a mixer, spread it on a sintering machine, ignite from the upper part, draw air from the lower part, and sinter from top to bottom. When sintering, the fuel burns to release heat, forming a high temperature, which promotes a series of physical and chemical reactions. Some fusible substances in the mixture soften and melt to produce a certain amount of liquid phase, which wets and binds the surrounding ore powder particles. When the fuel is exhausted and the temperature drops, the liquid phase solidifies to form a porous product with a certain strength, which is called sintered ore.

[0003] The sintering process starts from the surface of the material layer and gradually proceeds downward, so there is an obvious layering phenomenon along the height of the material layer. The sintering material layer is divided into five layers from top to bottom, namely the sintered ore layer, the combustion layer, the preheating layer, the drying layer and the over-wet layer. As the sintering trolley moves, the five layers appear and disappear in turn, and finally only the sintered ore layer remains.

[0004] In addition to being affected by the porosity of the material layer, the combustion layer and the over-wet layer are the main areas restricting the sintering air permeability, resulting in hindered downward air extraction, slow combustion speed and decreased sintering productivity.

[0005] CN201910944418.0 discloses a production method for improving the air permeability of a thick material layer sintering. A support made of return ore, steel slag, dedusting ash, cement, etc. is added to the sintering material. This method requires a special support and manual feeding. The principle is only to support the material layer and reduce the pressure on the lower part of the material, which is beneficial to the improvement of air permeability, but it still does not fundamentally solve the problems of the two regions (combustion layer, over-wet layer) that limit the air permeability of the material layer. CN200910078993.3 discloses a load reduction device for a sintering material layer. The load reduction device in this method is prone to wear and tear, and the replacement of the device must stop the machine, resulting in a large amount of maintenance and renewal labor and high costs. Moreover, the load reduction device itself occupies the space of the sintering mixture on the sintering trolley, reducing the output of sintered ore. In addition, methods such as JP2 293586, JP4 168234, JP5 43950, JP6 129775, JP6 323745, etc. in Japan, which use trapezoidal or rectangular sintering material layer load reduction plates to reduce the load of the material layer and thereby improve the air permeability of the material layer, all have defects such as poor load reduction effect, easy damage, inconvenient replacement, and high costs, and cannot completely solve the negative impact of the support device. CN201710164243.2 discloses a sintering machine trolley using a parallel support frame. By setting support grate bars with a supporting function, the sintering material layer is supported to improve air permeability. However, in actual operation, since the underlayer feeder is in the trolley and the underlayer feeder limits the height of the underlayer material, such support grate bars cannot be implemented. Summary of the Invention

[0006] In view of the above-mentioned prior art, the object of the present invention is to provide a sintering machine and a method for increasing the sintering speed.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] In a first aspect of the present invention, there is provided a sintering machine, including a sintering trolley, a bottom material bin, a feeder, an igniter arranged in sequence along the running direction of the sintering trolley, a wind box located below the sintering trolley, and further including a heat conduction rod bin, a heat conduction rod arranger, and heat conduction rods. The heat conduction rod bin is located between the feeder and the bottom material bin. The bottom of the heat conduction rod bin is connected to the heat conduction rod arranger. The outlet at the bottom of the heat conduction rod arranger is located in the sintering material layer in the sintering trolley. The heat conduction rods are evenly distributed horizontally and vertically in the sintering material layer in the sintering trolley.

[0009] Preferably, the heat conduction rod is a cylinder or a cube, and the diameter or the side length of the cross-section of the heat conduction rod is 20 - 50 mm.

[0010] Preferably, the height of the heat conduction rod is 1 / 2 - 2 / 3 of the sintering material layer, and the bottom of the heat conduction rod is in contact with the bottom of the sintering trolley.

[0011] Preferably, the lateral spacing between the heat conducting rods is 500 - 1000 mm, the longitudinal spacing is 500 - 2000 mm, and the distance between the longitudinally arranged heat conducting rods and the edge of the sintering trolley is greater than 500 mm.

[0012] Preferably, the heat conducting rod bin is a horizontally arranged strip shape, and a plurality of heat conducting rod arrangers are provided at the bottom of the heat conducting rod bin. The heat conducting rod arrangers correspond to the horizontal heat conducting rods one by one, and the distance between the outlet of the heat conducting rod arranger and the top of the heat conducting rod is 1 - 5 mm.

[0013] Preferably, it further includes a crusher, a ring cooler, and a screen arranged in sequence at the tail of the sintering trolley. The screen is provided with an electromagnetic disk; the air box is connected to the dust collector through a pipeline, and the dust collector is connected to the induced draft fan through a pipeline.

[0014] The second aspect of the present invention provides a method for improving the sintering speed by using the above sintering machine, including the following steps:

[0015] The base material bin lays the base material in the sintering trolley, the batcher lays the sintering raw materials on the base material to form a sintering material layer. At the same time, the heat conducting rod arranger arranges the heat conducting rods into the sintering material layer. The height of the heat conducting rods is 1 / 2 - 2 / 3 of the sintering material layer. The sintering trolley moves, the igniter ignites, the air box attracts air to the lower part of the sintering trolley, the heat conducting rods and the sintering material are sintered together. The sintered material is broken by the crusher and then enters the ring cooler for cooling. When the screen performs screening, the electromagnetic disk magnetically attracts and recovers the heat conducting rods, and the heat conducting rods are recovered into the heat conducting rod bin.

[0016] Preferably, the heat conducting rods are in a vertical state in the sintering material layer. The heat conducting rods are vertically arranged in the sintering material layer and are fixed in a vertical state by relying on the sintering raw materials that collapse forward.

[0017] Preferably, the heat conducting rods are steel rods.

[0018] Preferably, the cloth thickness of the base material is 50 - 60 mm, and the cloth thickness of the sintering raw materials is 800 - 1000 mm.

[0019] Due to the low specific heat of the wind, the heat transfer downward during sintering is slow, resulting in a slow sintering speed downward. By adding heat conduction rods with high thermal conductivity in the middle and lower positions of the sintering material layer, on the one hand, the air permeability in the height of the material layer is increased, and on the other hand, the original heat transfer method is changed, so that the high-temperature combustion layer and the over-wet layer that limit the air permeability of the material layer are damaged. The heat transfer and air permeability of the heat conduction rods are significantly enhanced, and the sintering speed is accelerated. On the one hand, it is considered that the sintering in the upper and middle layers of the sintering material layer will be faster. The pressure on the upper and middle layers of the received material is small, and the air permeability of the sintering layer (actually partially softened and melted) is relatively not so poor. To the middle and lower parts, due to the pressure of the upper material, the air permeability of the sintering layer is relatively poorer. Moreover, considering that the upper and middle layers have good thermal conductivity, originally, due to insufficient heat, the strength of the sintered blocks in the upper and middle layers is poor, the sintering speed is fast, and the sintering quality is even worse. Due to the heat storage effect in the middle and lower parts, the heat is sufficient. Therefore, the height of the heat conduction rods is set to 1 / 2 - 2 / 3 of the sintering material layer.

[0020] The sintering material is mainly ferric oxide and is not attracted by a magnet, while the heat conduction rods are steel rods and can be attracted by a magnet. Therefore, during screening, the electromagnetic disk can magnetically attract the heat conduction rods to recover them, while the electromagnetic disk does not attract the sintering material.

[0021] When crushing, the gears of the crusher can only chisel the surface layer of the sintered ore, and the inside cannot be chiseled. The sintered ore is broken by force, and the heat conduction rods also fall off and are magnetically attracted by the electromagnetic disk during screening by the screen mesh and recycled to the heat conduction rod bin for reuse.

[0022] The beneficial effects of the present invention:

[0023] Based on the existing sintering process, the present invention is provided with a heat conduction rod bin and a heat conduction rod placer before sintering and charging, and an electromagnetic disk device is provided on the screen mesh for recovering the heat conduction rods. By adding heat conduction rods with high thermal conductivity in the middle and lower positions of the sintering material layer, on the one hand, the air permeability in the height of the material layer is increased, and on the other hand, the original heat transfer method is changed, so that the high-temperature combustion layer and the over-wet layer that limit the air permeability of the material layer are damaged. The heat transfer and air permeability of the heat conduction rods are significantly enhanced, and the sintering speed is accelerated. Description of the Drawings

[0024] Figure 1 : Schematic diagram of sintering and charging of the present invention;

[0025] Figure 2 : Schematic diagram of the structure of the heat conduction rod bin, the heat conduction rod placer and the heat conduction rods of the present invention;

[0026] Figure 3 : Schematic diagram of the positions of the heat conduction rod bin, the heat conduction rod placer and the heat conduction rods and the sintering material layer of the present invention;

[0027] Figure 4 : Schematic diagram of the arrangement of the heat conduction rods in the sintering trolley of the present invention;

[0028] As shown in the figure: 1. Sintering trolley, 2. Internal space of the sintering trolley, 3. Heat conduction rod, 4. Heat conduction rod bin, 5. Heat conduction rod placer, 6. Feeder, 7. Igniter, 8. Bedding material bin, 9. Crusher, 10. Ring cooler, 11. Screen, 12. Electromagnetic disk, 13. Wind box, 14. Dust collector, 15. Exhaust fan. Detailed implementation manners

[0029] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0030] As described in the background art, based on this, the present invention provides a sintering machine, including a sintering trolley 1, a bedding material bin 8, a feeder 6, and an igniter 7 arranged in sequence along the running direction of the sintering trolley 1, a wind box 13 located below the sintering trolley 1, and further including a heat conduction rod bin 4, a heat conduction rod placer 5, and a heat conduction rod 3. The heat conduction rod bin 4 is located between the feeder 6 and the bedding material bin 8. The bottom of the heat conduction rod bin 4 is connected to the heat conduction rod placer 5. The outlet at the bottom of the heat conduction rod placer 5 is located in the sintering material layer inside the sintering trolley 1. The heat conduction rod bin 4 is a horizontally arranged long strip. A plurality of heat conduction rod placers 5 are provided at the bottom of the heat conduction rod bin 4. The heat conduction rod placers 5 correspond one by one to the horizontal heat conduction rods 3. After the heat conduction rods 3 are arranged, the distance between the outlet of the heat conduction rod placer 5 and the top of the heat conduction rod 3 is 1 - 5 mm. The heat conduction rods 3 are horizontally and vertically uniformly distributed in the sintering material layer inside the sintering trolley 1. The heat conduction rods 3 are cylinders or cubes. The diameter or the side length of the cross section of the heat conduction rod 3 is 20 - 50 mm. The height of the heat conduction rod 3 is 1 / 2 - 2 / 3 of the sintering material layer. The bottom of the heat conduction rod 3 is in contact with the bottom of the sintering trolley 1. The horizontal interval between the heat conduction rods 3 is 500 - 1000 mm, and the vertical interval is 500 - 2000 mm. The distance between the vertically arranged heat conduction rods 3 and the edge of the sintering trolley 1 is greater than 500 mm. It further includes a crusher 9, a ring cooler 10, and a screen 11 arranged in sequence at the tail of the sintering trolley 1. An electromagnetic disk 12 is arranged on the screen 11; the wind box 13 is connected to the dust collector 14 through a pipeline, and the dust collector 14 is connected to the exhaust fan 15 through a pipeline.

[0031] The bedding material bin 8 evenly lays the sintered ore as the bedding material in the sintering trolley 1. The bedding material thickness is 50 - 60 mm. The feeder 6 evenly lays the sintering raw materials on the bedding material. The bedding thickness of the sintering raw materials is 800 - 1000 mm. The sintering raw materials are mainly a mixture of iron ore, containing coke powder, iron ore, and flux. At the same time, the heat conduction rod placer 5 arranges the heat conduction rods 3 into the sintering material layer. The height of the heat conduction rod 3 is 1 / 2 - 2 / 3 of the sintering material layer. The heat conduction rods are in a vertical state in the sintering material layer. The heat conduction rods are steel rods.

[0032] The sintering trolley 1 moves, the igniter 7 ignites, the air box 13 sucks air under the sintering trolley 1, the heat conducting rods 3 are sintered together with the sintering material, the sintered material enters the crusher 9 for crushing and then enters the annular cooler 10 for cooling. When screening with the screen 11, the electromagnetic disk 12 magnetically attracts and recovers the heat conducting rods 3, and the heat conducting rods 3 return to the heat conducting rod bin 4 for reuse.

[0033] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.

[0034] The test materials used in the embodiments of the present invention are all conventional test materials in the art and can be obtained through commercial channels.

[0035] Embodiment 1

[0036] A sintering machine includes a sintering trolley 1, a base material bin 8, a feeder 6, and an igniter 7 arranged in sequence along the running direction of the sintering trolley 1, an air box 13 located under the sintering trolley 1, and also includes a heat conducting rod bin 4, a heat conducting rod arranger 5, and heat conducting rods 3. The heat conducting rod bin 4 is located between the feeder 6 and the base material bin 8. The bottom of the heat conducting rod bin 4 is connected to the heat conducting rod arranger 5. The outlet at the bottom of the heat conducting rod arranger ⑤ is located in the sintering material layer inside the sintering trolley 1. The heat conducting rod bin 4 is a horizontally arranged long strip. There are several heat conducting rod arrangers 5 at the bottom of the heat conducting rod bin 4. The heat conducting rod arrangers 5 correspond one by one to the horizontally arranged heat conducting rods 3. The distance between the outlet of the heat conducting rod arranger 5 and the top of the heat conducting rod 3 is 1-5 mm. The heat conducting rods 3 are evenly distributed horizontally and vertically in the sintering material layer inside the sintering trolley 1. The heat conducting rods 3 are cylindrical or long strip-shaped. The height of the heat conducting rods 3 is 1 / 2-2 / 3 of the sintering material layer. The bottom of the heat conducting rods 3 is in contact with the bottom of the sintering trolley 1. It also includes a crusher 9, an annular cooler 10, and a screen 11 arranged in sequence at the tail of the sintering trolley 1. The electromagnetic disk 12 is arranged on the screen 11; the air box 13 is connected to the dust collector 14 through a pipeline, and the dust collector 14 is connected to the exhaust fan 15 through a pipeline.

[0037] The base material bin 8 evenly lays the sintered ore as the base material in the sintering trolley 1, the feeder 6 evenly lays the sintering raw materials on the base material. The sintering raw materials are mainly a mixture of iron ore, containing coke powder, iron ore, and flux. At the same time, the heat conducting rod arranger 5 arranges the heat conducting rods 3 into the sintering material layer. The height of the heat conducting rods 3 is 1 / 2 of the sintering material layer. The heat conducting rods are in a vertical state in the sintering material layer. The heat conducting rods are steel rods. The sintering trolley 1 moves, the igniter 7 ignites, the air box 13 sucks air under the sintering trolley 1, the heat conducting rods 3 are sintered together with the sintering material, enter the crusher 9 after being crushed and then enter the annular cooler 10. When screening with the screen 11, the electromagnetic disk 12 magnetically attracts and recovers the crushed heat conducting rods 3, and the heat conducting rods 3 return to the heat conducting rod bin 4 for reuse.

[0038] 400m2 The sintering machine is in normal burden distribution production. The thickness of the sintering burden is 1000 mm, the width of the sintering pallet is 3500 mm. The heat conduction rods are made of round steel bars with a diameter of 30 mm. There are three heat conduction rods arranged transversely on the pallet, one at the center position, and one at each position 1000 mm away from the center position on both sides. The longitudinal interval of the heat conduction rods is 2000 mm. During normal ignition and sintering, the heat conduction rods are recycled by the electromagnetic disk after being sintered out.

[0039] Example 2

[0040] A sintering machine includes a sintering pallet 1, a base material bin 8, a burden distributor 6, an igniter 7 arranged in sequence along the running direction of the sintering pallet 1, an air box 13 located below the sintering pallet 1, and also includes a heat conduction rod bin 4, a heat conduction rod arranger 5, and heat conduction rods 3. The heat conduction rod bin 4 is located between the burden distributor 6 and the base material bin 8. The bottom of the heat conduction rod bin 4 is connected to the heat conduction rod arranger 5. The outlet at the bottom of the heat conduction rod arranger 5 is located in the sintering burden layer inside the sintering pallet 1. The heat conduction rod bin 4 is a horizontally arranged long strip. There are several heat conduction rod arrangers 5 at the bottom of the heat conduction rod bin 4. The heat conduction rod arrangers 5 correspond to the horizontal heat conduction rods 3 one by one. The distance between the outlet of the heat conduction rod arranger 5 and the top of the heat conduction rod 3 is 1 - 5 mm. The heat conduction rods 3 are horizontally and longitudinally evenly distributed in the sintering burden layer inside the sintering pallet 1. The heat conduction rods 3 are cylindrical or long strip-shaped. The height of the heat conduction rods 3 is 1 / 2 - 2 / 3 of the sintering burden layer. The bottom of the heat conduction rods 3 is in contact with the bottom of the sintering pallet 1. It also includes a crusher 9, a ring cooler 10, and a screen 11 arranged in sequence at the tail of the sintering pallet 1. The electromagnetic disk 12 is arranged on the screen 11; the air box 13 is connected to the dust collector 14 through a pipeline, and the dust collector 14 is connected to the induced draft fan 15 through a pipeline.

[0041] The base material bin 8 evenly lays the sintered ore as the base material in the sintering pallet 1. The burden distributor 6 evenly lays the sintering raw materials on the base material. The sintering raw materials are mainly a mixture of iron ore, containing coke powder, iron ore, and flux. At the same time, the heat conduction rod arranger 5 arranges the heat conduction rods 3 into the sintering burden layer. The height of the heat conduction rods 3 is 1 / 2 of the sintering burden layer. The heat conduction rods are in a vertical state in the sintering burden layer. The heat conduction rods are steel bars. The sintering pallet 1 moves, the igniter 7 ignites, the air box 13 sucks air to the lower part of the sintering pallet 1. The heat conduction rods 3 and the sintering burden are sintered together. After being crushed by the crusher 9, it enters the ring cooler 10. When screening with the screen 11, the electromagnetic disk 12 magnetically attracts and recovers the crushed heat conduction rods 3. The heat conduction rods 3 return to the heat conduction rod bin 4 for reuse.

[0042] 400m 2The sintering machine is in normal burden feeding production. The thickness of the sintering burden is 900 mm, the width of the sintering pallet is 5000 mm. The heat conduction rods are made of round steel bars with a diameter of 40 mm. There are three heat conduction rods arranged horizontally on the pallet, one at the center position and one at each position 1000 mm away from the center position on both sides. The longitudinal interval between the heat conduction rods is 1500 mm. During normal ignition and sintering, the heat conduction rods are recovered by the electromagnetic disk after being sintered.

[0043] Example 3

[0044] A sintering machine includes a sintering pallet 1, a base material bin 8, a burden feeder 6, an igniter 7 arranged in sequence along the running direction of the sintering pallet 1, a wind box 13 located below the sintering pallet 1, and also includes a heat conduction rod bin 4, a heat conduction rod placer 5, heat conduction rods 3 and an electromagnetic disk 12. The heat conduction rod bin 4 is located between the burden feeder 6 and the base material bin 8. The bottom of the heat conduction rod bin 4 is connected to the heat conduction rod placer 5. The outlet at the bottom of the heat conduction rod placer 5 is located in the sintering burden layer inside the sintering pallet 1. The heat conduction rod bin 4 is a horizontally arranged long strip. There are several heat conduction rod placers 5 at the bottom of the heat conduction rod bin 4. The heat conduction rod placers 5 correspond to the horizontal heat conduction rods 3 one by one. The distance between the outlet of the heat conduction rod placer 5 and the top of the heat conduction rod 3 is 1 - 5 mm. The heat conduction rods 3 are horizontally and vertically evenly distributed in the sintering burden layer inside the sintering pallet 1. The heat conduction rods 3 are cylindrical or long strip-shaped. The height of the heat conduction rods 3 is 1 / 2 - 2 / 3 of the sintering burden layer. The bottom of the heat conduction rods 3 is in contact with the bottom of the sintering pallet 1. It also includes a crusher 9, a ring cooler 10, and a screen 11 arranged in sequence at the tail of the sintering pallet 1. The electromagnetic disk 12 is arranged on the screen 11; the wind box 13 is connected to a dust collector 14 through a pipeline, and the dust collector 14 is connected to a suction fan 15 through a pipeline.

[0045] The base material bin 8 evenly lays the sintered ore as the base material in the sintering pallet 1. The burden feeder 6 evenly lays the sintering raw materials on the base material. The sintering raw materials are mainly a mixture of iron ore, containing coke powder, iron ore, and flux. At the same time, the heat conduction rod placer 5 arranges the heat conduction rods 3 into the sintering burden layer. The height of the heat conduction rods 3 is 1 / 2 of the sintering burden layer. The heat conduction rods are in a vertical state in the sintering burden layer. The heat conduction rods are steel bars. The sintering pallet 1 moves, the igniter 7 ignites, the wind box 13 sucks air to the lower part of the sintering pallet 1. The heat conduction rods 3 and the sintering burden are sintered together. After being crushed by the crusher 9, it enters the ring cooler 10. When screening with the screen 11, the electromagnetic disk 12 magnetically attracts and recovers the crushed heat conduction rods 3. The heat conduction rods 3 return to the heat conduction rod bin 4 for reuse.

[0046] 400m 2The sintering machine is in normal charging production. The thickness of the sintering charge is 900 mm, the width of the sintering pallet car is 5000 mm. The heat conduction rods are made of round steel bars with a diameter of 40 mm. There are four heat conduction rods arranged transversely on the pallet car, with a spacing of 750 mm between them and a distance of 1000 mm from the edge of the pallet car. The longitudinal spacing of the heat conduction rods is 1500 mm. During normal ignition sintering, the heat conduction rods are recycled by the electromagnetic disk after being sintered out.

[0047] Comparative example

[0048] Different from Example 3, no heat conduction rods are arranged during sintering.

[0049] The sintering indexes of Examples 1 - 3 and the comparative example are shown in Table 1.

[0050] Table 1 Sintering indexes of Examples 1 - 3 and the comparative example

[0051]

[0052] Both the vertical sintering speed and the utilization coefficient have been significantly improved, and the sintering drum and the finished product rate indexes have also been improved.

[0053] Compared with the comparative example, the vertical sintering speed of Example 1 increased by 1.3 mm / min, the vertical sintering speed of Example 2 increased by 1.6 mm / min compared with the comparative example, and the vertical sintering speed of Example 3 increased by 2.3 mm / min compared with the comparative example.

[0054] On the basis of the existing process, the present invention adds heat conduction rods, which solves the problem that in the past, restricted by the combustion layer and the over-wet layer, the sintering air permeability was affected, thus affecting the sintering production efficiency. By arranging heat conduction rods with high thermal conductivity, the original heat transfer mode is changed, the high-temperature combustion layer and the over-wet layer that limit the air permeability of the material layer are damaged, the downward heat transfer is strengthened, at the same time the air permeability is improved, and the sintering speed is accelerated.

[0055] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sintering machine, characterized in that, It includes a sintering trolley, a base material bin, a feeder, an igniter arranged in sequence along the running direction of the sintering trolley, and an air box located below the sintering trolley. It also includes a heat conduction rod bin, a heat conduction rod placer, and heat conduction rods. The heat conduction rod bin is located between the feeder and the base material bin. The bottom of the heat conduction rod bin is connected to the heat conduction rod placer. The outlet at the bottom of the heat conduction rod placer is located in the sintered material layer inside the sintering trolley. The heat conduction rods are evenly distributed horizontally and vertically in the sintered material layer inside the sintering trolley; The heat conduction rods are in a vertical state in the sintered material layer; the height of the heat conduction rods is 1 / 2 - 2 / 3 of the sintered material layer, and the bottom of the heat conduction rods is in contact with the bottom of the sintering trolley; It also includes a crusher, a ring cooler, and a screen arranged in sequence at the tail of the sintering trolley. The screen is provided with an electromagnetic disk; the air box is connected to a dust collector through a pipeline, and the dust collector is connected to a suction fan through a pipeline.

2. The sintering machine according to claim 1, wherein The heat conduction rods are cylinders or cubes, and the diameter or side length of the cross-section of the heat conduction rods is 20 - 50 mm.

3. The sintering machine according to claim 1, wherein The horizontal interval between the heat conduction rods is 500 - 1000 mm, the vertical interval is 500 - 2000 mm, and the distance between the vertically arranged heat conduction rods and the edge of the sintering trolley is greater than 500 mm.

4. The sintering machine according to claim 1, characterized in that, The heat conduction rod bin is a horizontally arranged long strip. The bottom of the heat conduction rod bin is provided with several heat conduction rod placers. The heat conduction rod placers correspond to the horizontal heat conduction rods one by one. The distance between the outlet of the heat conduction rod placer and the top of the heat conduction rod is 1 - 5 mm.

5. A method for increasing the sintering speed by using the sintering machine according to any one of claims 1-4, characterized in that It includes the following steps: The base material bin lays the base material in the sintering trolley, the feeder lays the sintering raw materials on the base material to form a sintered material layer. At the same time, the heat conduction rod placer arranges the heat conduction rods into the sintered material layer. The height of the heat conduction rods is 1 / 2 - 2 / 3 of the sintered material layer. The sintering trolley moves, the igniter ignites, the air box sucks air to the lower part of the sintering trolley, the heat conduction rods and the sintered material are sintered together. The sintered material is broken by the crusher and then enters the ring cooler for cooling. When the screen is sieving, the electromagnetic disk magnetically attracts and recovers the heat conduction rods, and the heat conduction rods are recovered into the heat conduction rod bin.

6. The method for increasing the sintering speed according to claim 5, characterized in that The heat conduction rods are steel rods.

7. The method for increasing the sintering speed according to claim 5, characterized in that, The cloth thickness of the base material is 50 - 60 mm, and the cloth thickness of the sintering raw materials is 800 - 1000 mm.

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