CN111426198A - Device and method for measuring transverse uniformity of sintering machine - Google Patents

Device and method for measuring transverse uniformity of sintering machine Download PDF

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Publication number
CN111426198A
CN111426198A CN202010360585.3A CN202010360585A CN111426198A CN 111426198 A CN111426198 A CN 111426198A CN 202010360585 A CN202010360585 A CN 202010360585A CN 111426198 A CN111426198 A CN 111426198A
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sintering
exhaust pipe
material cup
supporting rod
sintering machine
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武轶
李邦平
张晓萍
李小静
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Maanshan Iron and Steel Co Ltd
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Maanshan Iron and Steel Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00—Type of treatment of the charge
    • F27M2003/04—Sintering

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a device and a method for measuring the transverse uniformity of a sintering machine, and relates to the technical field of iron ore sintering. The device for measuring the transverse uniformity of the sintering machine comprises a charging component, an inner exhaust pipe, a pipeline interface, an outer exhaust pipe, a pressure detection part, a flow detection part, a regulating valve and an exhaust fan. The charging assembly is arranged below the sintering trolley grate and is connected with a pipeline interface arranged on the side fence plate of the sintering trolley through an inner exhaust pipe. The device and the method for measuring the transverse uniformity of the sintering machine make up for the defects of the prior art, integrate various factors such as sintering, uniform mixing and granulation, material distribution, material loosening, material pressing and the like on the sintering machine, realize the detection of the air permeability of the transverse region of a sintering material layer, break through the limitations of the prior art, realize the simultaneous detection of the air permeability of the material layers of different transverse regions of the sintering machine, provide a technical scheme for finding out the difference of the air permeability of the material layers of the sintering machine in the transverse direction, and indicate the direction for improving the uniformity of a sintering cross section.

Description

Device and method for measuring transverse uniformity of sintering machine
Technical Field
The invention relates to the technical field of iron ore sintering, in particular to a device and a method for measuring the transverse uniformity of a sintering machine.
Background
The sintering process needs to supply air to the material layer, the combustion reaction of the solid fuel can be carried out, the mixed material layer can obtain necessary high temperature, and the material sintering can be smoothly realized. The flowing condition and change rule of gas in the sintering material layer are related to the processes of mass transfer, heat transfer and physical and chemical reaction in the sintering process, so that the air permeability of the sintering material layer is very important for the whole sintering process, and the gas-permeable sintering material layer has great influence on the yield, quality and energy consumption of sintering ores. Too poor air permeability affects the vertical sintering speed and the sintering utilization coefficient, and finally affects the sinter yield; too good air permeability and too fast sintering speed, short residence time of a high-temperature zone, and incapability of forming enough sintering liquid phase, thereby influencing the quality of sintered ores.
In recent years, sintering equipment has been becoming larger in size, and as the width of a sintering machine has increased, uniformity in the lateral direction (i.e., the width direction) of a sintering pallet has been remarkable. The transverse uniformity of the material layer of the sintering trolley is a basic condition for ensuring the consistent vertical sintering speed on the cross section of the material layer, can keep the stability of the operation of the sintering machine to the maximum extent, reduces the phenomena of over-burning and under-burning, directly influences the stability of the quality of the sintered ore and is beneficial to improving the quality of the sintered ore.
In the prior art, the transverse uniformity of the sintering machine is difficult to be well measured, and the vertical sintering speed on the cross section of a material layer is not uniform due to poor transverse uniformity, so that the probability of over-burning and under-burning phenomena is increased, the stability of a product is reduced, and the waste of fuel is caused.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a device and a method for measuring the transverse uniformity of a sintering machine, which solve the problems that in the prior art, the transverse uniformity of the sintering machine is difficult to be measured well, and the vertical sintering speed on the cross section of a material layer is not uniform easily caused by poor transverse uniformity, so that the probability of over-burning and under-burning phenomena is increased.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a sintering machine horizontal homogeneity survey device, includes the subassembly of feeding, interior exhaust tube, pipeline interface, outer exhaust pipe, pressure measurement part, flow measurement part, governing valve, air exhauster. The charging assembly is arranged below a sintering trolley grate and is connected with a pipeline interface arranged on a side fence plate of the sintering trolley through an inner exhaust pipe, the pipeline interface is connected with an exhaust fan through an outer exhaust pipe, a pressure detection part is connected onto the outer exhaust pipe, and a flow detection part and an adjusting valve are connected in series in the outer exhaust pipe.
Preferably, the charging assembly is mainly composed of a plurality of sub-charging assemblies which are distributed in parallel in the transverse direction of the sintering trolley.
Preferably, the sub-charging assembly mainly comprises a charging cup, a grate bar, a spiral supporting rod, a driving device and an air chamber. The spiral supporting rod is fixedly connected below the grate bar of the sintering trolley through the air chamber, the upper end of the spiral supporting rod is connected with the grate bar through a bearing, the spiral supporting rod is connected with the material cup through threads, the driving device is connected with the spiral supporting rod and used for driving the spiral supporting rod to rotate, and the air chamber is connected with the exhaust pipe.
Preferably, the height of the material cup is the height of a sintered material layer, the material cup is lifted by rotating the spiral supporting rod, the upper edge of the material cup is flush with the grate bar when the material cup is positioned at a lower limit position, and the lug boss of the material cup and the convex edge of the air chamber form a sealing structure when the material cup is positioned at an upper limit position.
A method for measuring the transverse uniformity of a sintering machine comprises the device for measuring the transverse uniformity of the sintering machine and comprises the following steps:
s1, confirming that the material cup is in a lower limit position before the sintering trolley is loaded;
s2, turning off the ignition furnace, and distributing while the sintering trolley moves;
s3, after the material distribution is finished and the material is flattened, hermetically connecting the outer exhaust pipe with the pipeline interface;
s4, starting a driving device to drive a spiral supporting rod to rotate, so that the material cup rises to an upper limit and stops, and at the moment, a material cup boss and an air chamber convex edge form a sealing structure;
s5, starting an exhaust fan, generating negative pressure in the material cup, adjusting an adjusting valve to enable the negative pressure of the exhaust fan to reach the sintering negative pressure, recording flow and pressure data, and calculating the permeability index of the material layer by using a permeability index formula;
and S6, stopping the exhaust fan, starting the driving device to drive the spiral supporting rod to rotate reversely, enabling the material cup to descend to the lower limit position to stop, and disconnecting the outer exhaust pipe from the pipeline interface.
(III) advantageous effects
The invention provides a device and a method for measuring the transverse uniformity of a sintering machine. The method has the following beneficial effects: the device and the method for measuring the transverse uniformity of the sintering machine make up for the defects of the prior art, integrate various factors such as sintering, uniform mixing and granulation, material distribution, material loosening, material pressing and the like on the sintering machine, realize the detection of the air permeability of the transverse region of a sintering material layer, break through the limitations of the prior art, realize the simultaneous detection of the air permeability of the material layers of different transverse regions of the sintering machine, provide a technical scheme for finding out the difference of the air permeability of the material layers of the sintering machine in the transverse direction, and indicate the direction for improving the uniformity of a sintering cross section.
Drawings
FIG. 1 is a schematic structural diagram of a sintering machine lateral uniformity measurement device according to the present invention;
FIG. 2 is a schematic structural view of the sub-charging assembly when the charging cup is at the lower limit position in the present invention;
FIG. 3 is a schematic structural view of the sub-charging assembly when the charging cup is at the upper limit position in the present invention;
FIG. 4 is a graph showing the results of measurement of the lateral uniformity of the sintering machine.
In the figure: 1. a charging assembly; 2. an inner exhaust pipe; 3. a pipe interface; 4. an outer gas extraction pipe; 5. a pressure detecting member; 6. a flow rate detection section; 7. adjusting a valve; 8. an exhaust fan; 9. a sub-charging assembly; 10. sintering the trolley; 11. an ignition furnace; 91. a material cup; 92. grid section; 93. a spiral support rod; 94. a drive device; 95. an air chamber; 911. the upper edge of the material cup; 912. a material cup boss; 951. the air chamber is convex.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a sintering machine lateral uniformity survey device, includes the subassembly of feeding 1, interior exhaust tube 2, pipeline interface 3, outer exhaust tube 4, pressure detection part 5, flow detection part 6, governing valve 7, air exhauster 8. The charging component 1 is arranged below a grate bar of a sintering pallet 10, the charging component 1 mainly comprises a plurality of sub-charging components 9 which are transversely distributed on the sintering pallet 10 in parallel, each sub-charging component 9 mainly comprises a material cup 91, a grate bar 92, a spiral supporting rod 93, a driving device 94 and an air chamber 95, the height of the material cup 91 is the height of a sintering material layer, the sub-charging components are lifted by rotating the spiral supporting rod 93, the upper edge 911 of the material cup is flush with the grate bar 92 when the sub-charging components are positioned at a lower limit position, a sealing structure is formed by a lug boss 912 of the material cup and a convex edge 951 of the air chamber when the sub-charging components are positioned at an upper limit position, the spiral supporting rod 93 is fixedly connected below the grate bar of the sintering pallet 10 through the air chamber 95, the upper end of the spiral supporting rod 93 is connected with the grate bar 92 through a bearing, the spiral supporting rod 93 is connected with the material cup 91 through a thread, the driving device 94 is connected with the spiral supporting rod 93 for driving the spiral supporting rod 93 to rotate, the pipeline interface 3 is connected with an exhaust fan 8 through an outer exhaust pipe 4, a pressure detection part 5 is connected on the outer exhaust pipe 4, and a flow detection part 6 and an adjusting valve 7 are connected in series in the outer exhaust pipe 4.
A method for measuring the transverse uniformity of a sintering machine comprises the device for measuring the transverse uniformity of the sintering machine and comprises the following steps:
s1, confirming that the material cup 91 is at a lower limit position before the sintering trolley 10 is loaded;
s2, closing the ignition furnace, and distributing while the sintering trolley 10 moves;
s3, after the material distribution is finished and the material is flattened, the outer exhaust pipe 4 is hermetically connected with the pipeline interface 3;
s4, starting the driving device 94 to drive the spiral supporting rod 93 to rotate, so that the material cup 91 is lifted to an upper limit and stops, and at the moment, the material cup boss 912 and the air chamber convex edge 951 form a sealing structure;
s5, starting the exhaust fan 8, generating negative pressure in the material cup 91, adjusting the adjusting valve 7 to enable the exhaust negative pressure to reach the sintering negative pressure, recording flow and pressure data, and calculating the material layer air permeability index by using an air permeability index formula;
and S6, stopping the exhaust fan 8, starting the driving device 94 to drive the spiral supporting rod 93 to rotate reversely, so that the material cup 91 descends to a lower limit position to stop, and the outer exhaust pipe 4 is disconnected from the pipeline connector 3.
Example 1:
referring to fig. 1, the device for measuring the lateral uniformity of a sintering machine in the present embodiment mainly comprises a charging assembly 1, an inner exhaust pipe 2, a pipeline interface 3, an outer exhaust pipe 4, a pressure detection component 5, a flow detection component 6, an adjusting valve 7, and an exhaust fan 8. The charging assembly 1 is arranged below a grate of the sintering trolley 10 and is connected with a pipeline interface 3 arranged on a side fence plate of the sintering trolley 10 through an inner exhaust pipe 2, the pipeline interface 3 is connected with an exhaust fan 8 through an outer exhaust pipe 4, a pressure detection part 5 is connected on the outer exhaust pipe 4, and a flow detection part 6 and an adjusting valve 7 are connected in series in the outer exhaust pipe 4.
The charging assembly 1 in this embodiment is mainly composed of a plurality of sub-charging assemblies 9 distributed in parallel in the lateral direction of the sintering pallet 10, and the specific number and the spacing can be selected and designed according to the width of the sintering pallet 10 used. In the present embodiment, 5 sub-charging assemblies 9 are provided as an example to explain the present embodiment, and the 5 sub-charging assemblies 9 are arranged in parallel along the same straight line, and the distances therebetween are equal.
Referring to fig. 2 and 3, the sub-charging assembly 9 of the present embodiment is mainly composed of a cup 91, a grate 92, a spiral support rod 93, a driving device 94, and an air chamber 95. The spiral support rod 93 is fixedly connected below the grate bar of the sintering trolley 10 through an air chamber 95, the upper end of the spiral support rod 93 is connected with the grate bar 92 through a bearing, the spiral support rod 93 is connected with the material cup 91 through threads, the driving device 94 is connected with the spiral support rod 93 and used for driving the spiral support rod 93 to rotate, and the air chamber 95 is connected with the exhaust pipe 96.
The height of the material cup 91 in the embodiment is the height of a sintered material layer, the material cup 91 is lifted by rotating the spiral support rod 93, the upper edge 911 of the material cup is flush with the grate bar 92 when the material cup 91 is at the lower limit position, and the boss 912 of the material cup and the convex edge 951 of the air chamber form a sealing structure when the material cup 91 is at the upper limit position.
Example 2:
the method for measuring the transverse uniformity of the sintering machine in the embodiment uses the device for measuring the transverse uniformity of the sintering machine, and comprises the following steps:
step one, confirming that a material cup 91 is positioned at a lower limit position before the sintering trolley 10 is loaded, wherein the upper edge 911 of the material cup is flush with a grid 92;
step two, closing the ignition furnace, and distributing materials while the sintering trolley 10 moves;
step three, after the material distribution is finished and the material is flattened, the outer exhaust pipe 4 is hermetically connected with the pipeline interface 3;
fourthly, the driving device 94 is started to drive the spiral supporting rod 93 to rotate, so that the material cup 91 is lifted to an upper limit position and stops, the material cup is filled with a sintering mixture subjected to granulation, distribution, material loosening and material pressing, and a material cup boss 912 and an air chamber convex edge 951 form a sealing structure to prevent air outside the material cup 91 from leaking;
and step five, starting the exhaust fan 8, generating negative pressure in the material cups 91, respectively pumping air at the upper parts of the sinter layers into the sinter layers of the 5 material cups 91, and sequentially passing through the air chamber 95, the inner exhaust pipe 2, the pipeline connector 3, the outer exhaust pipe 4, the pressure detection part 5, the flow detection part 6 and the regulating valve 7.
Regulating the regulating valve 7 to enable the air draft negative pressure to reach the sintering negative pressure, recording flow and pressure data, and calculating the material layer permeability index of 5 transverse points of the sintering machine;
and calculating the permeability index of the sinter bed according to the formula of E & ltcndot & gtW & ltwoys (Voice):
Figure BDA0002474859710000061
where M-permeability index, JPU;
q-air flow through the bed, m3/min；
AEffect of (1)-is provided withEffective sintering area, m2；
h-thickness of the sintering material layer, mm;
p-negative pressure of air draft, Pa;
and seventhly, stopping the exhaust fan 8, starting the driving device 94 to drive the spiral supporting rod 93 to rotate reversely, so that the material cup 91 descends to a lower limit position to stop, and disconnecting the outer exhaust pipe 4 from the pipeline connector 3.
The measurement results of the lateral uniformity of the sintering machine of this example are shown in fig. 4.
In conclusion, the device and the method for measuring the transverse uniformity of the sintering machine make up for the defects of the prior art, integrate various factors such as sintering, uniform mixing and granulation, material distribution, material loosening, material pressing and the like on the sintering machine, realize the detection of the air permeability of the transverse area of the sintering material layer, break through the limitations of the prior art, realize the simultaneous detection of the air permeability of the material layers in different transverse areas of the sintering machine, provide a technical scheme for finding out the difference of the air permeability of the material layers in the transverse direction of the sintering machine, and indicate the direction for improving the uniformity of the sintering cross section.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a sintering machine lateral uniformity survey device which characterized in that: the device comprises a charging assembly (1), an inner exhaust pipe (2), a pipeline connector (3), an outer exhaust pipe (4), a pressure detection component (5), a flow detection component (6), a regulating valve (7) and an exhaust fan (8). The charging assembly (1) is arranged below a grate of the sintering trolley (10) and is connected with a pipeline interface (3) arranged on a side fence plate of the sintering trolley (10) through an inner exhaust pipe (2), the pipeline interface (3) is connected with an exhaust fan (8) through an outer exhaust pipe (4), a pressure detection part (5) is connected onto the outer exhaust pipe (4), and a flow detection part (6) and an adjusting valve (7) are connected in series in the outer exhaust pipe (4).
2. The apparatus according to claim 1, wherein: the charging assembly (1) mainly comprises a plurality of sub-charging assemblies (9) which are distributed in parallel in the transverse direction of a sintering trolley (10).
3. The apparatus according to claim 2, wherein: the sub-charging assembly (9) mainly comprises a charging cup (91), a grate bar (92), a spiral supporting rod (93), a driving device (94) and an air chamber (95). The spiral supporting rod (93) is fixedly connected below a grid section of the sintering trolley (10) through an air chamber (95), the upper end of the spiral supporting rod (93) is connected with the grid section (92) through a bearing, the spiral supporting rod (93) is in threaded connection with the material cup (91), the driving device (94) is connected with the spiral supporting rod (93) and used for driving the spiral supporting rod (93) to rotate, and the air chamber (95) is connected with the air exhaust pipe (96).
4. The apparatus according to claim 3, wherein: the height of the material cup (91) is the height of a sintering material layer, the material cup is lifted up and down through the rotary spiral supporting rod (93), the upper edge (911) of the material cup is flush with the grate bar (92) when the material cup is positioned at a lower limit position, and the lug boss (912) of the material cup and the convex edge (951) of the air chamber form a sealing structure when the material cup is positioned at an upper limit position.
5. A method for measuring the transverse uniformity of a sintering machine is characterized by comprising the following steps: the device comprises the device for measuring the transverse uniformity of the sintering machine and adopts the following steps:
s1, confirming that the material cup (91) is at a lower limit position before the sintering trolley (10) is loaded;
s2, closing the ignition furnace, and distributing materials while the sintering trolley (10) moves;
s3, after the cloth is completely pressed, the outer air exhaust pipe (4) is hermetically connected with the pipeline connector (3);
s4, starting a driving device (94) to drive a spiral supporting rod (93) to rotate, so that the material cup (91) is lifted to an upper limit position and stops, and at the moment, a material cup boss (912) and an air chamber convex edge (951) form a sealing structure;
s5, starting an exhaust fan (8), generating negative pressure in the material cup (91), adjusting an adjusting valve (7) to enable the negative pressure of air draft to reach sintering negative pressure, recording flow and pressure data, and calculating the permeability index of the material layer by using a permeability index formula;
s6, stopping the exhaust fan (8), starting the driving device (94) to drive the spiral supporting rod (93) to rotate reversely, enabling the material cup (91) to descend to the lower limit position to stop, and disconnecting the outer exhaust pipe (4) from the pipeline connector (3).
CN202010360585.3A 2020-04-30 2020-04-30 Device and method for measuring transverse uniformity of sintering machine Pending CN111426198A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113077848A (en) * 2021-03-26 2021-07-06 马鞍山钢铁股份有限公司 Online judgment and calculation method for air permeability of sinter bed
CN114659369A (en) * 2022-03-30 2022-06-24 中冶华天工程技术有限公司 Double closed-loop sintering material distribution control method based on air permeability soft measurement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113077848A (en) * 2021-03-26 2021-07-06 马鞍山钢铁股份有限公司 Online judgment and calculation method for air permeability of sinter bed
CN113077848B (en) * 2021-03-26 2024-05-14 马鞍山钢铁股份有限公司 Online judgment and calculation method for air permeability of sinter bed
CN114659369A (en) * 2022-03-30 2022-06-24 中冶华天工程技术有限公司 Double closed-loop sintering material distribution control method based on air permeability soft measurement
CN114659369B (en) * 2022-03-30 2023-12-26 中冶华天工程技术有限公司 Double closed loop sintering cloth control method based on air permeability soft measurement

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