A sintering control method

Abstract

The application provides a sintering control method, which comprises the following steps: spraying and blowing a first sintering material surface by using a hot air sintering process or a flue gas internal circulation process; spraying and blowing a second sintering material surface by using a hydrogen-rich gas; spraying and blowing a third sintering material surface by using the hot air sintering process or the flue gas internal circulation process, and spraying and blowing the second sintering material surface and the third sintering material surface by using a material surface steam spraying process at the same time; and spraying and blowing a fourth sintering material surface by using a flue gas external circulation process; wherein the sintering machine material surface comprises the first sintering material surface, the second sintering material surface, the third sintering material surface and the fourth sintering material surface; thus, the spraying and blowing can be strengthened according to different stages of the sintering process, the different spraying and blowing processes can be synergistically strengthened, the flue gas emission of the sintering machine can be further reduced, and the technical effects of improving the heat utilization efficiency of the sintering process, reducing the carbon fuel consumption and improving the sinter quality can be achieved.

Description

Technical Field

[0001] This application relates to the field of sintering technology, and more particularly to a sintering control method. Background Technology

[0002] Iron ore sintering is an essential iron ore processing step for steel companies, but it is also a significant contributor to energy consumption and pollutant emissions. In particular, there are very strict emission standards for pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter generated during the sintering process, in order to control emissions and achieve green and low-carbon development.

[0003] Currently, the application of sintering technology in the sintering process is generally achieved by spraying a single type of material. However, the sintering material has different material characteristics at different sintering stages. Therefore, the single type of material spraying method cannot further improve the sintering effect and reduce pollutant emissions. Summary of the Invention

[0004] To address the problems existing in the prior art, embodiments of the present invention provide a sintering control method and apparatus to solve or partially solve the technical problem that the single material surface blowing method in the prior art cannot further improve the sintering effect and reduce pollutant emissions.

[0005] A first aspect of the present invention provides a sintering control method, the method comprising:

[0006] The first sintering material surface is sprayed with hot air sintering or flue gas internal circulation.

[0007] Hydrogen-rich gas is used to blow onto the second sintering surface;

[0008] The third sintering material surface is sprayed using a hot air sintering process or a flue gas internal circulation process, while the second sintering material surface and the third sintering material surface are sprayed simultaneously using a material surface steam spraying process.

[0009] The fourth sintering surface is sprayed with gas using an external flue gas recirculation process; among which...

[0010] Along the direction from the head to the tail of the sintering machine trolley, the sintering machine material surface includes: the first sintering material surface, the second sintering material surface, the third sintering blowing surface, and the fourth sintering material surface.

[0011] In the above scheme, the first sintering material surface accounts for 5-15% of the sintering exhaust area, the second sintering material surface accounts for 10-25% of the sintering exhaust area, the third sintering material surface accounts for 20-30% of the sintering exhaust area, and the fourth sintering material surface accounts for 5-15% of the sintering exhaust area; a preset interval distance is provided between adjacent sintering material surfaces, and the interval distance accounts for 5-15% of the exhaust area.

[0012] In the above scheme, the first sintering material surface, the third sintering material surface and the fourth sintering material surface are covered with a flue gas hood, while the second sintering material surface is not covered with the flue gas hood.

[0013] The method in the above scheme further includes:

[0014] When blowing each sintering material surface, the blowing is performed sequentially based on the order of the first sintering material surface, the second sintering material surface, the third sintering material surface, and the fourth sintering material surface.

[0015] In the above scheme, the step of sequentially blowing based on the first sintering material surface, the second sintering material surface, the third sintering material surface, and the fourth sintering material surface includes:

[0016] Start the blowing process on the first sintering material surface and maintain the blowing state for 2~4 hours;

[0017] Keep the first sintering material surface in the blowing state, start the blowing of the second sintering material surface, and keep the blowing state for 2~4 hours;

[0018] Keep the second sintering material surface in the blowing state, start the blowing of the third sintering material surface, and keep the blowing state for 2~4 hours;

[0019] Keep the third sintering material surface in the blowing state, and start blowing the fourth sintering material surface.

[0020] In the above scheme, when the steam injection process is used to simultaneously inject steam into the second sintering surface and the third sintering surface, the total amount of steam injection is 0.3 to 0.7% of the sintering output.

[0021] In the above scheme, the hydrogen-rich gas includes: coke oven gas, natural gas or liquefied petroleum gas.

[0022] In the above scheme, the step of spraying hydrogen-rich gas onto the second sintering surface includes:

[0023] The flow rate of the hydrogen-rich gas is determined based on the first calorific value of the hydrogen-rich gas, the second calorific value of the solid fuel, and the sintering exhaust area.

[0024] The second sintering surface is sprayed with the hydrogen-rich gas based on the flow rate.

[0025] In the above scheme, the air intake boxes corresponding to the flue gas internal circulation process and the flue gas external circulation process are different.

[0026] A second aspect of the present invention provides a sintering control device, the device comprising:

[0027] The first blowing control unit is used to blow the first sintering material surface using hot air sintering process or flue gas internal circulation process.

[0028] The second injection control unit is used to inject hydrogen-rich gas onto the second sintering surface.

[0029] The third blowing control unit is used to blow the third sintering material surface using hot air sintering process or flue gas internal circulation process, and simultaneously blow the second sintering material surface and the third sintering material surface using material surface steam blowing process.

[0030] The fourth injection control unit is used to inject air onto the fourth sintering surface using a flue gas external circulation process; wherein,

[0031] Along the direction from the head to the tail of the sintering machine trolley, the sintering machine material surface includes: the first sintering material surface, the second sintering material surface, the third sintering blowing surface, and the fourth sintering material surface.

[0032] This invention provides a sintering control method and apparatus. The method includes: blowing a first sintering material surface using a hot air sintering process or a flue gas internal circulation process; blowing a second sintering material surface using hydrogen-rich gas; blowing a third sintering material surface using a hot air sintering process or a flue gas internal circulation process, while simultaneously blowing the second and third sintering material surfaces using a material surface steam blowing process; and blowing a fourth sintering material surface using a flue gas external circulation process. The sintering material surface includes a first sintering material surface, a second sintering material surface, a third sintering material blowing surface, and a fourth sintering material surface along the direction from the head to the tail of the sintering machine trolley. Thus, blowing can be performed separately according to different stages of the sintering process, resulting in a synergistic strengthening effect of different blowing processes, further reducing sintering machine flue gas emissions, and thereby achieving the technical effects of improving the heat utilization efficiency of the sintering process, reducing carbon fuel consumption, and improving the quality of sintered ore. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 A schematic flowchart of a sintering control method according to an embodiment of the present invention is shown;

[0035] Figure 2 A schematic diagram of a sintering control device according to an embodiment of the present invention is shown. Detailed Implementation

[0036] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0037] This invention provides a sintering control method, such as... Figure 1 As shown, the method includes the following steps:

[0038] S110 involves spraying hot air onto the first sintering material surface using either a hot air sintering process or a flue gas internal circulation process.

[0039] In this embodiment, the sintering machine material surface is first divided into four areas according to different stages of the sintering process, along the running direction of the sintering machine trolley, that is, along the direction from the head to the tail of the sintering machine trolley. The sintering machine material surface includes: the first sintering material surface, the second sintering material surface, the third sintering blowing surface, and the fourth sintering material surface.

[0040] The first sintering material surface occupies 5-15% of the sintering exhaust area, the second sintering material surface occupies 10-25% of the sintering exhaust area, the third sintering material surface occupies 20-30% of the sintering exhaust area, and the fourth sintering material surface occupies 5-15% of the sintering exhaust area. There is a preset interval between adjacent sintering material surfaces, which accounts for 5-15% of the exhaust area. Adjacent sintering material surfaces can be arranged side by side, but cannot overlap.

[0041] Furthermore, the first, third, and fourth sintering surfaces are covered with flue gas hoods, while the second sintering surface is not covered with a flue gas hood.

[0042] Since each sintering material surface is in a different sintering time period, it will have different sintering characteristics. In this embodiment, different sintering blowing methods are implemented for each sintering material surface to improve the stability of the sintering process.

[0043] For the first sintering surface, hot air sintering process or flue gas internal circulation process can be used to spray the first sintering surface.

[0044] Among them, the hot air sintering process generally refers to the process of introducing the hot air generated after the sintering ring cooler cools the sintered ore to the sintering machine material surface through an induced draft fan. The main purpose is to recover the heat in the gas and improve the quality of the upper layer of sintered ore on the sintering material surface and increase the output by optimizing the injection position.

[0045] Flue gas recirculation technology primarily involves returning a portion of the hot flue gas generated during combustion in the sintering process to the sintering machine's material surface, allowing it to participate in the sintering process again. This reduces flue gas emissions and utilizes the flue gas to improve the quality of the sintered ore. Depending on the location of the sintering flue gas, it can be divided into external flue gas recirculation technology and internal flue gas recirculation technology.

[0046] In this embodiment, the air intake boxes for the internal flue gas recirculation process and the external flue gas recirculation process are different. Two to four air boxes are installed at the tail of the sintering machine trolley, allowing the internal flue gas recirculation process to draw air from the branch pipes of the air boxes at the tail. The location of the air box corresponding to the external flue gas recirculation process must not overlap with the air intake location of the air box for the internal flue gas recirculation process.

[0047] When blowing each sintering material surface, the blowing is performed sequentially based on the order of the first sintering material surface, the second sintering material surface, the third sintering material surface, and the fourth sintering material surface.

[0048] In one embodiment, the blowing is performed sequentially based on the first sintering material surface, the second sintering material surface, the third sintering material surface, and the fourth sintering material surface, including:

[0049] Start the blowing process on the first sintering surface and maintain the blowing state for 2-4 hours;

[0050] Keep the first sintering material surface in the blowing state, start the blowing of the second sintering material surface, and keep the blowing state for 2~4 hours;

[0051] Keep the first and second sintering surfaces in the blowing state, start the blowing of the third sintering surface, and keep the blowing state for 2-4 hours;

[0052] Keep the first, second, and third sintering surfaces in the blowing state, and start blowing the fourth sintering surface.

[0053] The final stable operating state is achieved by simultaneous blowing of the four sintering surfaces to carry out stable sintering production and ensure the quality of sintered ore.

[0054] S111 utilizes hydrogen-rich gas to spray onto the second sintering surface.

[0055] After the first sintering surface is purged, hydrogen-rich gas is used to purge the second sintering surface. This hydrogen-rich gas includes gases rich in hydrogen such as coke oven gas, natural gas, or liquefied petroleum gas.

[0056] The hydrogen-rich fuel injection process involves injecting hydrogen-rich gaseous fuels, such as natural gas or coke oven gas, into the sintering bed through the material surface to replace part of the solid fuel in the mixture, improve the shape and position of the high-temperature zone in sintering, thereby achieving the goals of fuel substitution, improving the quality of sintered ore, and realizing the green and low-carbon development of sintering.

[0057] In one embodiment, hydrogen-rich gas is used to spray the second sintering surface, including:

[0058] The flow rate of the hydrogen-rich gas is determined based on the primary calorific value of the hydrogen-rich gas, the secondary calorific value of the solid fuel, and the sintering exhaust area; wherein the flow rate of the hydrogen-rich gas ranges from 50 to 500 Nm³. 3 / h.

[0059] The second sintering surface is sprayed with hydrogen-rich gas based on the flow rate.

[0060] Specifically, hydrogen-rich gas is used to replace part of the solid fuel to provide heat for the sintering process. Therefore, it is necessary to determine the flow rate of the hydrogen-rich gas and the proportion of solid fuel in the sintering mixture.

[0061] S112, the third sintering material surface is sprayed using a hot air sintering process or a flue gas internal circulation process, and the second sintering material surface and the third sintering material surface are sprayed simultaneously using a material surface steam spraying process.

[0062] For the third sintering surface, hot air sintering process or flue gas internal circulation process can be used to blow the third sintering surface, and steam blowing process can be used to blow the second and third sintering surfaces simultaneously.

[0063] The steam injection process involves injecting steam from the sintering surface into the sintering layer to promote the combustion of fuel during sintering, improve heat transfer in the sintering layer, and thus improve the quality indicators of sintered minerals.

[0064] In this embodiment, when the second sintering surface and the third sintering surface are purged simultaneously using the steam injection process, the total amount of steam injection is 0.3 to 0.7% of the sinter production.

[0065] S114 utilizes external flue gas circulation technology to spray the fourth sintering material surface.

[0066] For the fourth sintering surface, the flue gas external circulation process is used to spray the fourth sintering surface.

[0067] It is worth noting that when blowing air onto the first, third, and fourth sintering surfaces, the flue gas volume flow rate or hot air volume flow rate corresponding to each sintering surface can be determined based on the exhaust area of ​​the sintering machine and the air volume received by the sintering surface. The flue gas volume flow rate or hot air volume flow rate of the first sintering surface accounts for 6-12% of the air volume received by the sintering surface, the flue gas volume flow rate or hot air volume flow rate of the third sintering surface accounts for 20-25% of the air volume received by the sintering surface, and the flue gas volume flow rate of the fourth sintering surface accounts for 10-20% of the air volume received by the sintering surface.

[0068] The blowing process used in each sintering material surface in this embodiment is designed based on the characteristics of the sintering process and cannot be changed in position to avoid negative effects.

[0069] The sintering control method provided in this embodiment can perform injection strengthening according to different stages of the sintering process, so that different injection processes can produce synergistic strengthening effects, further reduce the flue gas emissions of the sintering machine, and thus achieve the technical effects of improving the heat utilization efficiency of the sintering process, reducing the amount of carbon fuel used, and improving the quality of sintered ore.

[0070] Based on the same inventive concept as the foregoing embodiments, this embodiment also provides a sintering control device, such as... Figure 2 As shown, the device includes:

[0071] The first blowing control unit 21 is used to blow the first sintering material surface using hot air sintering process or flue gas internal circulation process.

[0072] The second blowing control unit 22 is used to blow hydrogen-rich gas onto the second sintering material surface;

[0073] The third blowing control unit 23 is used to blow the third sintering material surface using hot air sintering process or flue gas internal circulation process, and simultaneously blow the second sintering material surface and the third sintering material surface using material surface steam blowing process.

[0074] The fourth injection control unit 24 is used to inject air onto the fourth sintering surface using a flue gas external circulation process; wherein,

[0075] Along the direction from the head to the tail of the sintering machine trolley, the sintering machine material surface includes: the first sintering material surface, the second sintering material surface, the third sintering blowing surface, and the fourth sintering material surface.

[0076] The first sintering material surface occupies 5-15% of the sintering exhaust area, the second sintering material surface occupies 10-25% of the sintering exhaust area, the third sintering material surface occupies 20-30% of the sintering exhaust area, and the fourth sintering material surface occupies 5-15% of the sintering exhaust area; a preset interval distance is provided between adjacent sintering material surfaces, and the interval distance occupies 5-15% of the exhaust area.

[0077] It should be noted that this device can be a standalone server, and there are no restrictions on this.

[0078] Since the apparatus described in the embodiments of this invention is an apparatus used to implement the methods of the embodiments of this invention, those skilled in the art can understand the specific structure and variations of the apparatus based on the methods described in the embodiments of this invention, and therefore will not be described in detail here. All apparatuses used in the methods of the embodiments of this invention fall within the scope of protection of this invention.

[0079] Through one or more embodiments of the present invention, the present invention has the following beneficial effects or advantages:

[0080] This invention provides a sintering control method and apparatus. The method includes: blowing a first sintering material surface using a hot air sintering process or a flue gas internal circulation process; blowing a second sintering material surface using hydrogen-rich gas; blowing a third sintering material surface using a hot air sintering process or a flue gas internal circulation process, while simultaneously blowing the second and third sintering material surfaces using a material surface steam blowing process; and blowing a fourth sintering material surface using a flue gas external circulation process. The sintering material surface includes a first sintering material surface, a second sintering material surface, a third sintering material blowing surface, and a fourth sintering material surface along the direction from the head to the tail of the sintering machine trolley. Thus, blowing can be performed separately according to different stages of the sintering process, resulting in a synergistic strengthening effect of different blowing processes, further reducing sintering machine flue gas emissions, and thereby achieving the technical effects of improving the heat utilization efficiency of the sintering process, reducing carbon fuel consumption, and improving the quality of sintered ore.

[0081] In practical applications, when using the above-mentioned sintering control method and sintering control device to control the blowing of a sintering machine production line, the implementation process is as follows:

[0082] Example 1

[0083] First, along the running direction of the sintering machine trolley, that is, along the direction from the head to the tail of the sintering machine trolley, the sintering machine material surface is divided into four areas according to different stages of the sintering process: the first sintering material surface, the second sintering material surface, the third sintering blowing surface, and the fourth sintering material surface.

[0084] The first sintering material surface accounts for 8% of the sintering exhaust area, the second sintering material surface accounts for 17%, the third sintering material surface accounts for 20%, and the fourth sintering material surface accounts for 12%. The sintering machine exhaust area is 200m². 2 .

[0085] The hot air from the sintering ring cooler is sequentially introduced to the first sintering material surface for blowing using a hot air sintering process; hydrogen-rich gas (coke oven gas) is used to blow the second sintering material surface; flue gas internal circulation process is used to blow the third sintering material surface, and steam blowing process is used simultaneously to blow the second and third sintering material surfaces; and flue gas external circulation process is used to blow the fourth sintering material surface.

[0086] When the second and third sintering surfaces are purged using a steam injection process, the total amount of steam injected is 0.4% of the sinter production.

[0087] When using hydrogen-rich gas (coke oven gas) to inject into the second sintering surface, the coke oven gas blowing rate is 160 m³ / h. 3 / h, correspondingly, the solid fuel ratio in the sintering mixture is 0.1%.

[0088] After injection, the amount of sintering flue gas discharged externally is reduced by 20%, the amount of solid combustion of sinter is reduced by 2.3 kg, and the output of sinter is increased by 2%.

[0089] Example 2

[0090] First, along the running direction of the sintering machine trolley, that is, along the direction from the head to the tail of the sintering machine trolley, the sintering machine material surface is divided into four areas according to different stages of the sintering process: the first sintering material surface, the second sintering material surface, the third sintering blowing surface, and the fourth sintering material surface.

[0091] The first sintering material surface accounts for 10% of the sintering exhaust area, the second sintering material surface accounts for 20%, the third sintering material surface accounts for 25%, and the fourth sintering material surface accounts for 15%. The sintering machine exhaust area is 360m². 2 .

[0092] The hot air from the sintering ring cooler is sequentially introduced to the first sintering material surface for blowing using a hot air sintering process; hydrogen-rich gas (coke oven gas) is used to blow the second sintering material surface; flue gas internal circulation process is used to blow the third sintering material surface, and steam blowing process is used simultaneously to blow the second and third sintering material surfaces; and flue gas external circulation process is used to blow the fourth sintering material surface.

[0093] When the second and third sintering surfaces are purged using a steam injection process, the total amount of steam injected is 0.6% of the sinter production.

[0094] When using hydrogen-rich gas (coke oven gas) to inject into the second sintering surface, the coke oven gas blowing rate is 350 m³ / h. 3 / h, correspondingly, the solid fuel ratio in the sintering mixture is 0.2%.

[0095] After injection, the amount of sintering flue gas discharged externally was reduced by 24%, the amount of solid combustion of sinter was reduced by 2.6 kg, and the output of sinter was increased by 3%.

[0096] Example 3

[0097] First, along the running direction of the sintering machine trolley, that is, along the direction from the head to the tail of the sintering machine trolley, the sintering machine material surface is divided into four areas according to different stages of the sintering process: the first sintering material surface, the second sintering material surface, the third sintering blowing surface, and the fourth sintering material surface.

[0098] The first sintering material surface accounts for 5% of the sintering exhaust area, the second sintering material surface accounts for 16%, the third sintering material surface accounts for 25%, and the fourth sintering material surface accounts for 15%. The sintering machine exhaust area is 500m². 2 .

[0099] The hot air from the sintering ring cooler is sequentially introduced to the first sintering material surface for blowing using a hot air sintering process; hydrogen-rich gas (coke oven gas) is used to blow the second sintering material surface; flue gas internal circulation process is used to blow the third sintering material surface, and steam blowing process is used simultaneously to blow the second and third sintering material surfaces; and flue gas external circulation process is used to blow the fourth sintering material surface.

[0100] When the second and third sintering surfaces are purged using a steam injection process, the total amount of steam injected is 0.5% of the sinter production.

[0101] When using hydrogen-rich gas (coke oven gas) to inject into the second sintering surface, the coke oven gas blowing rate is 500 m³ / h. 3 / h, correspondingly, the solid fuel ratio in the sintering mixture is 0.3%.

[0102] After injection, the amount of sintering flue gas discharged externally decreased by 24%, the solid combustion of sinter ore decreased by 2.7 kg, and the output of sinter ore increased by 3.5%.

[0103] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0104] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0105] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0106] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0107] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0108] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components of the gateway, proxy server, or system according to embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0109] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0110] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0111] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sintering control method, characterized in that, The invention relates to a sintering control device, which includes a first blowing control unit for blowing a first sintering material surface using a hot air sintering process or a flue gas internal circulation process. The second injection control unit is used to inject hydrogen-rich gas onto the second sintering surface. The third blowing control unit is used to blow the third sintering material surface using hot air sintering process or flue gas internal circulation process, and simultaneously blow the second sintering material surface and the third sintering material surface using material surface steam blowing process. The fourth blowing control unit is used to blow the fourth sintering material surface using the flue gas external circulation process; wherein, along the direction from the head to the tail of the sintering machine trolley, the sintering machine material surface includes: the first sintering material surface, the second sintering material surface, the third sintering blowing surface and the fourth sintering material surface. The method includes: The first sintering material surface is sprayed using hot air sintering process or flue gas internal circulation process, and the spraying state is maintained for 2-4 hours. The second sintering material surface is purged with hydrogen-rich gas. The flow rate of the hydrogen-rich gas is determined based on the first calorific value of the hydrogen-rich gas, the second calorific value of the solid fuel, and the sintering exhaust area. The second sintering material surface is purged based on the flow rate of the hydrogen-rich gas. The first sintering material surface is kept in the purging state, and the purging of the second sintering material surface is started and maintained in the purging state for 2 to 4 hours. The third sintering material surface is sprayed using a hot air sintering process or a flue gas internal circulation process, while the second and third sintering material surfaces are sprayed simultaneously using a material surface steam spraying process; wherein, the first and second sintering material surfaces are kept in the spraying state, the spraying of the third sintering material surface is started, and the spraying state is maintained for 2 to 4 hours. The fourth sintering material surface is purged using an external flue gas recirculation process. The air intake boxes for the internal and external flue gas recirculation processes are different. Along the direction from the head to the tail of the sintering machine trolley, the sintering material surfaces include: a first sintering material surface, a second sintering material surface, a third sintering material blowing surface, and a fourth sintering material surface. When purging each sintering material surface, purging is performed sequentially based on the order of the first, second, third, and fourth sintering material surfaces. The first, second, and third sintering material surfaces are kept in a state of continuous purging. In the blowing state, the blowing of the fourth sintering material surface is initiated. The first, third, and fourth sintering material surfaces are covered with fume hoods, while the second sintering material surface is not covered by a fume hood. The first sintering material surface occupies 5-15% of the sintering exhaust area, the second sintering material surface occupies 10-25% of the sintering exhaust area, the third sintering material surface occupies 20-30% of the sintering exhaust area, and the fourth sintering material surface occupies 5-15% of the sintering exhaust area. A preset interval distance is provided between adjacent sintering material surfaces, and this interval distance occupies 5-15% of the exhaust area.

2. The method as described in claim 1, characterized in that, When the steam injection process is used to inject steam into the second and third sintering surfaces simultaneously, the total amount of steam injected is 0.3 to 0.7% of the sinter production.

3. The method as described in claim 1, characterized in that, The hydrogen-rich gas includes coke oven gas, natural gas, or liquefied petroleum gas.

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