Sintered mixture heating device and method

Abstract

The application discloses a sintering mixture heating device and method, which comprises a conveying belt for conveying sintering mixture, a heat radiation assembly for heating the sintering mixture and an outer cover for preventing heat loss of the sintering mixture, wherein the outer cover is arranged above the conveying belt, the outer cover is respectively provided with an inlet and an outlet, both ends of the conveying belt are respectively extended to the outside of the outer cover through the inlet and the outlet, and the heat radiation assembly is arranged in the inner part of the outer cover. The application solves the technical problem that the sintering effect is poor due to large heat loss of the sintering mixture during conveying.

Description

Technical Field

[0001] This invention relates to a heating device, and more particularly to a heating device and method for sintering mixtures. Background Technology

[0002] The temperature of the sintering mixture is a crucial factor limiting sintering production. If the temperature reaches above the dew point (typically 60°C to 65°C during sintering), it significantly reduces the excessive moisture caused by water vapor condensation in the material layer. This effectively reduces the thickness of the excessively moist layer and its resistance to airflow, improving the permeability of the material layer, increasing the yield and quality of sinter, and reducing energy consumption. Specifically, for every 1°C increase in the temperature of the sintering mixture, solid fuel consumption can be reduced by 0.145 kg / t. However, current technology lacks equipment for heating the sintering mixture during transport, leading to continuous heat loss. In low-temperature environments, this heat loss is severe, resulting in poor sintering performance, failing to meet process requirements, reduced production efficiency, and increased production costs.

[0003] There is currently no effective solution to the problem of significant heat loss during the transportation of sintering mixtures in related technologies, which leads to poor sintering results.

[0004] Therefore, based on years of experience and practice in related industries, the inventor proposes a sintering mixture heating device and method to overcome the shortcomings of the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a heating device and method for sintering mixtures. During the conveying process of sintering mixtures, infrared heating technology is used to heat the sintering mixtures, thereby increasing the temperature of the sintering mixtures, improving the permeability of the material layer, reducing production costs, and increasing production efficiency.

[0006] The objective of this invention can be achieved using the following technical solutions:

[0007] This invention provides a heating device for sintering mixtures, comprising a conveyor belt for conveying the sintering mixture, a heat radiation component for heating the sintering mixture, and an outer casing for preventing heat loss from the sintering mixture, wherein:

[0008] The outer cover is positioned above the conveyor belt, and the outer cover has an inlet and an outlet. Both ends of the conveyor belt extend out of the outer cover through the inlet and the outlet, respectively. The heat radiation component is located inside the outer cover.

[0009] In a preferred embodiment of the present invention, the outer cover is a semi-cylindrical structure with openings at both ends, which is arranged along the extension direction of the conveyor belt, and the inlet and outlet are the two open ends of the outer cover, respectively.

[0010] In a preferred embodiment of the present invention, the thermal radiation component includes a plurality of infrared heaters, each of which is disposed on the top inner wall of the outer cover. The infrared heaters are spaced apart along the extension direction of the conveyor belt, and the infrared emitting end of the infrared heater is facing the conveying surface of the conveyor belt.

[0011] In a preferred embodiment of the present invention, an insulation layer is provided on the outer wall of the outer cover.

[0012] In a preferred embodiment of the present invention, the inner wall of the outer cover is provided with a coating layer that reflects infrared rays and is resistant to high temperatures.

[0013] In a preferred embodiment of the present invention, the sintering mixture heating device further includes a plurality of alarms capable of detecting the temperature inside the outer casing and sending alarm signals, wherein each of the alarms is spaced apart inside the outer casing along the extension direction of the conveyor belt.

[0014] In a preferred embodiment of the present invention, the alarm is a temperature alarm.

[0015] In a preferred embodiment of the present invention, the sintering mixture heating device further includes a controller that receives the detection signals of each of the alarms and controls each of the infrared heaters. The detection signal output terminals of each of the alarms are electrically connected to the detection signal receiving terminal of the controller, and the control signal output terminal of the controller is electrically connected to the control terminal of each of the infrared heaters.

[0016] In a preferred embodiment of the present invention, the sintering mixture heating device further includes a temperature measuring component for detecting the temperature of the sintering mixture after heating. The temperature measuring component is disposed at the discharge port of the outer cover, and the detection signal output terminal of the temperature measuring component is electrically connected to the detection signal receiving terminal of the controller.

[0017] In a preferred embodiment of the present invention, the temperature measuring component is a temperature sensor.

[0018] In a preferred embodiment of the present invention, a support frame is provided at the bottom of the conveyor belt.

[0019] The present invention provides a method for heating a sintering mixture, wherein the sintering mixture is heated by radiation energy emitted by a thermal radiation component during the conveying process, and an outer cover is placed above the sintering mixture to prevent the loss of heat and radiation energy.

[0020] In a preferred embodiment of the present invention, the local temperature of the sintering mixture during the conveying process is detected by multiple alarms, and the intensity of the thermal radiation component is controlled according to the detection results.

[0021] In a preferred embodiment of the present invention, after the alarm detects that the local temperature of the sintering mixture exceeds a preset temperature threshold, the alarm sounds an alarm and controls the thermal radiation component to stop working.

[0022] In a preferred embodiment of the present invention, the temperature of the sintered mixture after heating is detected by a temperature measuring component, and the intensity of the thermal radiation component is controlled according to the detection result.

[0023] In a preferred embodiment of the present invention, an insulating layer is provided on the outer wall of the outer cover to prevent the loss of heat and radiant energy.

[0024] In a preferred embodiment of the present invention, the sintering mixture is conveyed by a conveyor belt.

[0025] As described above, the features and advantages of the sintering mixture heating device and method of the present invention are: an outer cover is provided above the conveyor belt, and a heat radiation component is provided inside the outer cover. During the conveying process of the sintering mixture on the conveyor belt, the sintering mixture is heated by the heat radiation component to ensure that the temperature of the sintering mixture is kept above the dew point temperature during the conveying process, reducing the occurrence of excessive moisture in the material layer, thereby improving the air permeability of the material layer and improving the sintering effect and production efficiency. Attached Figure Description

[0026] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0027] in:

[0028] Figure 1 : This is a schematic diagram of the sintering mixture heating device of the present invention.

[0029] Figure 2 : This is a cross-sectional view of the sintering mixture heating device of the present invention.

[0030] Figure 3 : This is a block diagram of the control structure of the sintering mixture heating device of the present invention.

[0031] The reference numerals in the accompanying drawings of this invention are:

[0032] 1. Outer casing; 101. Insulation layer;

[0033] 102. Feed inlet; 103. Discharge outlet;

[0034] 2. Thermal radiation components; 3. Alarm device;

[0035] 4. Temperature measuring components; 5. Conveyor belt;

[0036] 6. Support frame; 7. Controller. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0038] Implementation Method 1

[0039] like Figure 1 , Figure 2 As shown, the present invention provides a sintering mixture heating device, which includes a conveyor belt 5, a heat radiation component 2, and an outer cover 1. The conveyor belt 5 is used to transport the sintering mixture, the heat radiation component 2 is used to heat the sintering mixture, and the outer cover 1 is used to prevent heat loss from the sintering mixture. Specifically, the outer cover 1 is positioned above the conveyor belt 5, and has an inlet 102 and an outlet 103. One end of the conveyor belt 5 extends out of the outer cover 1 through the inlet 102, and the other end extends out of the outer cover 1 through the outlet 103. During the conveying process, the sintering mixture enters the outer cover 1 through the inlet 102 along with the conveyor belt 5, and exits through the outlet 103 along with the conveyor belt 5. The heat radiation component 2 is disposed inside the outer cover 1.

[0040] The present invention provides an outer cover 1 above the conveyor belt 5, and a heat radiation component 2 is provided inside the outer cover 1. During the conveying process of the sintering mixture on the conveyor belt 5, the heat radiation component 2 heats the sintering mixture, and the outer cover 1 keeps the sintering mixture warm, ensuring that the temperature of the sintering mixture is kept above the dew point temperature (60°C to 65°C) during the conveying process, reducing the occurrence of excessive moisture in the material layer, thereby improving the air permeability of the material layer, and improving the sintering effect and production efficiency.

[0041] Specifically, such as Figure 1 , Figure 2 As shown, the outer cover 1 is a semi-cylindrical structure with openings at both ends, which is arranged along the extension direction of the conveyor belt 5. The inlet 102 and the outlet 103 are the two open ends of the outer cover 1, respectively.

[0042] In an optional embodiment of the present invention, the thermal radiation component 2 includes multiple infrared heaters, each of which is disposed on the top inner wall of the outer casing 1. The infrared heaters are spaced apart along the extension direction of the conveyor belt 5, and the infrared emitting end of the infrared heater faces the conveying surface of the conveyor belt 5 to ensure that the infrared rays of a certain wavelength emitted by the infrared heater can be absorbed by the sintering mixture. Infrared heating technology is a type of radiation heating technology. Infrared rays can penetrate the surface of the material to reach its interior, accelerating the infrared heating rate. Moreover, near-infrared waves do not heat the air or the medium, resulting in higher energy conversion efficiency. Compared with traditional heating methods, infrared heating has the following advantages: 1. Infrared rays have strong penetrating power, allowing simultaneous heating of the inside and outside of the material; 2. Infrared heating does not require a heat transfer medium, resulting in high thermal efficiency; 3. Infrared rays can provide localized heating, saving energy; 4. Infrared heating temperature is easy to control and heats up rapidly; 5. Infrared heating is pollution-free and highly safe. Therefore, the present invention uses multiple infrared heaters to heat the sintering mixture on the conveyor belt 5 to rapidly increase the temperature of the sintering mixture and replenish the heat lost by the sintering mixture.

[0043] Specifically, the infrared heater is a tubular structure arranged in a horizontal direction, with a power of 3kW and an infrared wavelength range of 15μm to 20μm.

[0044] Furthermore, the outer cover 1 can be made of, but is not limited to, stainless steel. It is necessary to ensure that the material of the outer cover 1 has a certain strength and heat resistance, and has strong reflective properties for radiant energy, thereby reducing the loss of radiant energy and improving heating efficiency.

[0045] Specifically, the outer cover 1 has a wall thickness of 8mm, a length of 33m, and a radius of 0.75m. Of course, the specific shape and size of the outer cover 1 can be adjusted according to the operational requirements and the on-site working environment.

[0046] In an optional embodiment of the present invention, such as Figure 1 , Figure 2 As shown, an insulation layer 101 is evenly laid on the outer wall of the outer cover 1, which plays a role in heat preservation of the sintering mixture.

[0047] Furthermore, the insulation layer 101 may be made of, but is not limited to, composite aluminum silicate insulation material, and the thickness of the insulation layer 101 is 100mm.

[0048] In an optional embodiment of the present invention, the inner wall of the outer cover 1 is provided with a coating layer that reflects infrared rays and is resistant to high temperatures, thereby further improving the reflectivity of the outer cover 1 to radiation energy.

[0049] Furthermore, the coating layer may be made of, but is not limited to, reflective heat-insulating coatings.

[0050] In an optional embodiment of the present invention, such as Figure 1 , Figure 2 As shown, the sintering mixture heating device also includes multiple alarms 3 capable of detecting the temperature inside the outer casing 1 and sending alarm signals. Each alarm 3 is spaced apart on the inner wall of the outer casing 1 along the extension direction of the conveyor belt 5, with a distance of 6m between adjacent alarms 3. By real-time monitoring of the temperature of different conveying sections inside the outer casing 1 by each alarm 3, a temperature threshold can be preset (the temperature threshold can be set to 75℃). When the local temperature of the sintering mixture exceeds the temperature threshold, the corresponding alarm 3 sends an alarm signal, and all infrared heaters stop working to prevent excessively high local temperatures and potential fires.

[0051] Furthermore, alarm 3 can be, but is not limited to, a temperature alarm.

[0052] In an optional embodiment of the present invention, such as Figures 1 to 3 As shown, the sintering mixture heating device also includes a controller 7, which is located outside the outer casing 1. The detection signal output terminals of each alarm 3 are electrically connected to the detection signal receiving terminal of the controller 7, and the control signal output terminals of the controller 7 are electrically connected to the control terminals of each infrared heater. The controller 7 can be located in the sintering main control room, or it can be located at the work site, and it is connected to the control equipment in the sintering main control room. By receiving the detection signals from each alarm 3 through the controller 7, and controlling the working status of each infrared heater according to the detection signals, remote control of the heating temperature of the sintering mixture can be achieved.

[0053] In an optional embodiment of the present invention, such as Figures 1 to 3 As shown, the sintering mixture heating device also includes a temperature measuring component 4, which is located at the discharge port 103 of the outer casing 1. The detection signal output terminal of the temperature measuring component 4 is electrically connected to the detection signal receiving terminal of the controller 7. The temperature measuring component 4 detects the temperature of the heated sintering mixture and sends the detection data to the controller 7. The controller automatically adjusts the intensity of the infrared rays emitted by each infrared heater based on the feedback temperature data to meet the heating requirements of the sintering mixture and ensure that the discharge temperature is controlled within the range of 60℃ to 65℃.

[0054] Furthermore, the temperature sensing component 4 may be, but is not limited to, a temperature sensor.

[0055] In an optional embodiment of the present invention, such as Figure 1 , Figure 2 As shown, a support frame 6 is provided at the bottom of the conveyor belt 5 to improve the stability of the conveyor belt 5 in the horizontal direction.

[0056] In one optional embodiment of the present invention, a belt conveyor with a bandwidth of 1.2m can be used to transport the sintering mixture, wherein the belt surface portion of the belt conveyor is the conveyor belt 5, and the intermediate frame portion of the belt conveyor is the support frame 6. Of course, other conveying equipment can also be used to ensure stable transport of the sintering mixture.

[0057] The features and advantages of the sintering mixture heating device of the present invention are as follows:

[0058] 1. The sintering mixture heating device heats the sintering mixture through the thermal radiation component 2, and the outer cover 1 and the insulation layer 101 keep the sintering mixture warm, ensuring that the temperature of the sintering mixture is kept above the dew point temperature during the conveying process, reducing the occurrence of excessive moisture in the material layer, thereby improving the air permeability of the material layer, and improving the sintering effect and production efficiency.

[0059] Second, in this sintering mixture heating device, the outer cover 1 has a certain strength and heat resistance, and can have strong reflective characteristics of radiation energy. Furthermore, the inner wall of the outer cover 1 is provided with a coating layer that reflects infrared rays and is resistant to high temperatures, ensuring strong reflective ability of radiation energy, thereby reducing the loss of radiation energy and improving heating efficiency.

[0060] Third, in this sintering mixture heating device, multiple alarms 3 are installed inside the outer cover 1, and a temperature measuring component 4 is installed at the discharge port 103 of the outer cover 1, which can detect the local temperature of the sintering mixture and the discharge temperature of the sintering mixture after heating, so as to ensure that the heating temperature of the sintering mixture meets the requirements.

[0061] Implementation Method 2

[0062] The present invention provides a method for heating sintering mixtures. The method involves heating the sintering mixtures during the conveying process using radiation energy emitted by a thermal radiation component 2, and preventing the loss of heat and radiation energy by using an outer cover 1 placed above the sintering mixtures.

[0063] In this method, the local temperature of the sintering mixture during the conveying process is detected by multiple alarms 3, and the intensity of the thermal radiation component 2 is controlled according to the detection results.

[0064] Furthermore, after the alarm 3 detects that the local temperature of the sintering mixture exceeds the preset temperature threshold, the alarm 3 corresponding to the local location will sound an alarm, and the controller 7 will control the heat radiation component 2 corresponding to the local location to stop working.

[0065] In this method, the temperature of the sintered mixture after heating is detected by the temperature measuring component 4, and the intensity of the thermal radiation component 2 is controlled according to the detection result.

[0066] In this method, an insulation layer 101 is provided on the outer wall of the outer cover 1 to prevent the loss of heat and radiation energy.

[0067] In this method, the sintering mixture is conveyed by conveyor belt 5.

[0068] The specific process of this method is described below:

[0069] The sintering mixture enters the outer casing 1 through the feed inlet 102 and is conveyed by the conveyor belt 5 towards the discharge outlet 103 within the outer casing 1. During the conveying process within the outer casing 1, the sintering mixture is heated by infrared rays emitted by each infrared heater. Each alarm 3 within the outer casing 1 detects the local temperature of the sintering mixture at its corresponding location and sends the detected temperature data to the controller 7, allowing operators to monitor the heating temperature of each local location of the sintering mixture in real time. After heating, the sintering mixture is output from the discharge outlet 103 of the outer casing 1. At the discharge outlet 103, the temperature of the heated sintering mixture is detected by the temperature measuring component 4, and the detected temperature data is sent to the controller 7, allowing operators to monitor the discharge temperature in real time and control the discharge temperature above the dew point temperature, thereby improving the permeability of the material layer, reducing production costs, and increasing production efficiency.

[0070] The features and advantages of the sintering mixture heating method of the present invention are as follows:

[0071] The heating method for the sintering mixture uses a thermal radiation component 2 to heat the sintering mixture, and the outer cover 1 and the insulation layer 101 keep the sintering mixture warm, ensuring that the temperature of the sintering mixture is kept above the dew point temperature during the transportation process, reducing the occurrence of excessive moisture in the material layer, thereby improving the air permeability of the material layer and improving the sintering effect and production efficiency.

[0072] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A sintering mixture heating method, which is implemented by using a sintering mixture heating device, and is characterized in that: the sintering mixture heating device comprises a conveying belt (5) for conveying the sintering mixture, a heat radiation assembly (2) for heating the sintering mixture, and an outer cover (1) for preventing heat loss of the sintering mixture, wherein: the outer cover (1) is arranged above the conveying belt (5), the outer cover (1) is respectively provided with an inlet (102) and an outlet (103), the two ends of the conveying belt (5) respectively extend to the outside of the outer cover (1) through the inlet (102) and the outlet (103), and the heat radiation assembly (2) is arranged inside the outer cover (1); the outer wall of the outer cover (1) is provided with a heat preservation layer (101), and the inner wall of the outer cover (1) is provided with a coating layer which is capable of reflecting infrared rays and resistant to high temperature; the heat radiation assembly (2) comprises a plurality of infrared heaters, and the infrared emission ends of the infrared heaters are opposite to the conveying surface of the conveying belt (5); the sintering mixture heating method is to heat the sintering mixture by the radiation energy emitted by the heat radiation assembly (2) during the conveying process of the sintering mixture, and to prevent heat and radiation energy loss by the outer cover (1) arranged above the sintering mixture; the infrared heaters emit infrared rays with a wavelength range of 15-20 μm, so that the infrared rays emitted by the infrared heaters are absorbed by the sintering mixture, the infrared rays can penetrate the surface of the sintering mixture to reach the inside of the sintering mixture, the inside and outside of the sintering mixture are heated at the same time, the temperature of the sintering mixture during the conveying process is kept above the dew point temperature of 60-65°, and the permeability of the sintering mixture layer is improved; the outer cover (1) is a semi-cylindrical structure with two open ends arranged along the extension direction of the conveying belt (5), and the inlet (102) and the outlet (103) are respectively the two open ends of the outer cover (1); each infrared heater is arranged on the inner wall of the top of the outer cover (1), and each infrared heater is arranged along the extension direction of the conveying belt (5) at intervals; the sintering mixture heating device further comprises a plurality of alarms (3) capable of detecting the temperature inside the outer cover (1) and sending alarm signals, and each alarm (3) is arranged inside the outer cover (1) along the extension direction of the conveying belt (5) at intervals; the alarm (3) is a temperature alarm; the sintering mixture heating device further comprises a controller (7) for receiving the detection signals of the alarms (3) and controlling the infrared heaters, the detection signal output ends of the alarms (3) are electrically connected with the detection signal receiving ends of the controller (7) respectively, the control signal output ends of the controller (7) are electrically connected with the control ends of the infrared heaters respectively, the local temperature of the sintering mixture during the conveying process is detected by the plurality of alarms (3), and the intensity of the heat radiation assembly (2) is controlled according to the detection results. ​ ​ ​ ​ ​ ​ 2. The sinter mix heating method according to claim 1, wherein ​ 3. The sinter mix heating method according to claim 2, wherein ​ 4. The sintering mix heating method according to claim 3, wherein ​ 5. The sinter mix heating method as claimed in claim 4, wherein, ​ 6. The sinter mix heating method as claimed in claim 4, wherein, ​ 7. The sinter mix heating method as claimed in claim 6, wherein, The sintering mixture heating device further comprises a temperature measuring assembly (4) for detecting the temperature of the sintering mixture after heating, which is arranged at the discharge port (103) of the outer cover (1), and the detection signal output end of the temperature measuring assembly (4) is electrically connected with the detection signal receiving end of the controller (7), the temperature of the sintering mixture after heating is detected by the temperature measuring assembly (4), and the intensity of the heat radiation assembly (2) is controlled according to the detection result.

8. The sintered mixture heating method according to claim 7, wherein The temperature measuring assembly (4) is a temperature sensor.

9. The sinter mix heating method as claimed in claim 1, wherein, The bottom of the conveying belt (5) is provided with a supporting frame (6).

10. The sinter mix heating method as claimed in claim 6, wherein, After the alarm (3) detects that the local temperature of the sintering mixture exceeds the preset temperature threshold, the alarm (3) alarms externally, and the heat radiation assembly (2) is controlled to stop working.

11. The sinter mix heating method as claimed in claim 1, wherein, The outer wall of the outer cover (1) is provided with a heat preservation layer (101) for preventing heat and radiation energy from being lost.

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