A low-temperature coupling pellet roasting boron series additive quantitative feeding device

Abstract

This utility model relates to the field of iron and steel metallurgy technology, specifically to a quantitative feeding device for boron-based additives in low-temperature coupled pellet roasting. It includes a frame and a storage silo, with the storage silo fixedly installed on the frame. The device also includes a feeding device comprising a screw feeder, a vibrating feed plate, a weighing sensor, a flow control valve, a stirring and arch-breaking assembly, and a control assembly. The screw feeder is installed inside the frame and communicates with the bottom of the storage silo. The vibrating feed plate is installed inside the frame and near the discharge end of the screw feeder. The vibrating feed plate also has a discharge pipe. The weighing sensor is installed on the discharge pipe, and the flow control valve is installed on the discharge pipe and near the weighing sensor. Material feeding is achieved through the storage silo, screw feeder, and vibrating feed plate. Precise control of the material feeding is achieved through the control of the weighing sensor and flow control valve by the control assembly.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgy technology, and in particular to a quantitative feeding device for boron-based additives in low-temperature coupled pellet roasting. Background Technology

[0002] Iron pellets are an important iron-containing raw material for blast furnace ironmaking in the iron and steel metallurgy. Their production process requires roasting to solidify fine-grained iron concentrate into pellets with certain strength and metallurgical properties. Traditional pellet roasting (such as the chain grate rotary kiln process) typically requires relatively high temperatures (1200-1300℃), resulting in high energy consumption, significant equipment wear and tear, and large carbon emissions. To achieve energy conservation, emission reduction, and lower production costs, low-temperature coupled pellet roasting technology has become a research hotspot in recent years. This technology, by optimizing the roasting regime (such as the coordinated control of the low-temperature and high-temperature sections) and adding specific additives, can reduce the roasting temperature by 100-200℃ while ensuring key indicators such as the strength and reducibility of the pellets. Among these, boron-based additives (such as boric acid and borax) are commonly used key additives in low-temperature coupled roasting processes because they can effectively reduce the sintering temperature of iron concentrate and promote liquid phase formation and grain growth at low temperatures.

[0003] Existing quantitative feeding devices have significant shortcomings in terms of precise control, stability, and process adaptability of boron-based additives, making it difficult to meet the stringent requirements of quantitative accuracy and continuity of additives in low-temperature coupled pellet roasting. Utility Model Content

[0004] The purpose of this invention is to provide a quantitative feeding device for boron-based additives in low-temperature coupled pellet roasting, which solves the problem that existing quantitative feeding devices have significant shortcomings in terms of precise control, stability and process adaptability of boron-based additives, and are difficult to meet the stringent requirements of quantitative accuracy and continuity of additives in low-temperature coupled pellet roasting.

[0005] To achieve the above objectives, this utility model provides a quantitative feeding device for boron-based additives in low-temperature coupled pellet roasting, comprising a frame and a storage silo, the storage silo being fixedly installed on the frame. It also includes a feeding device comprising a screw feeder, a vibrating feed pan, a weighing sensor, a flow control valve, a stirring and arch-breaking assembly, and a control assembly. The screw feeder is installed inside the frame and communicates with the bottom of the storage silo. The vibrating feed pan is installed inside the frame and near the discharge end of the screw feeder. The vibrating feed pan also has a discharge pipe. The weighing sensor is installed on the discharge pipe, and the flow control valve is installed on the discharge pipe and near the weighing sensor.

[0006] The stirring and arch-breaking assembly includes stirring blades, a rotating shaft, a motor, and a support member. The motor is installed in the storage silo via the support member; the rotating shaft is fixedly installed on the output shaft of the motor; and the stirring blades are fixedly installed on the rotating shaft.

[0007] The supporting components include a horizontal supporting plate and a diagonal supporting plate. The horizontal supporting plate is fixedly installed inside the storage hopper and is fixedly connected to the motor. The diagonal supporting plate is fixedly installed inside the storage hopper and is fixedly connected to the horizontal supporting plate.

[0008] The control components include a controller and a human-machine interface. The controller is fixedly installed on the outside of the frame and electrically connected to the screw feeder, vibrating feeder, weighing sensor and motor respectively. The human-machine interface is fixedly installed on the outside of the frame and electrically connected to the controller.

[0009] The storage silo is also equipped with an air cannon, which is fixedly installed at the bottom of the storage silo and electrically connected to the controller.

[0010] This invention relates to a quantitative feeding device for boron-based additives in low-temperature coupled pellet roasting. During use, the boron-based additives are added through the feed inlet at the top of the storage silo, and the stirring blades continuously agitate the material to prevent agglomeration. When production starts, the controller activates the screw feeder according to a preset feed rate, adjusting the speed to initially control the feed rate. The material falls into the vibrating feed pan, where an electromagnetic vibrator adjusts vibration parameters to move the material evenly towards the discharge port and into the discharge pipe. As the material passes through the weighing sensor on the discharge pipe, the weighing sensor transmits a weight signal to the controller. The controller compares this signal to the target feed rate; if there is a deviation, it adjusts the opening of the flow control valve to precisely control the feed rate. When arching occurs in the storage silo, an air cannon, triggered by the controller, operates to break up the arching. Operators set parameters and monitor the equipment's operating status through a human-machine interface. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0012] Figure 1 This is a schematic diagram of the overall structure of a boron-based additive quantitative feeding device for low-temperature coupled pellet roasting according to this utility model.

[0013] Figure 2 This is a schematic diagram of the feeding device of this utility model.

[0014] Figure 3This is a structural schematic diagram of the stirring and arch-breaking component of this utility model.

[0015] In the diagram: 101-Frame, 102-Storage bin, 103-Screw feeder, 104-Vibrating feeder, 105-Weighing sensor, 106-Flow control valve, 107-Discharge pipe, 108-Agitator blade, 109-Rotating shaft, 110-Motor, 111-Supporting horizontal plate, 112-Supporting inclined plate, 113-Controller, 114-Human machine interface, 115-Air cannon. Detailed Implementation

[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0017] The embodiment of this application is as follows:

[0018] Please see Figure 1-3 , Figure 1 This is a schematic diagram of the overall structure of a boron-based additive quantitative feeding device for low-temperature coupled pellet roasting according to this utility model. Figure 2 This is a structural schematic diagram of the feeding device of this utility model. Figure 3 This is a structural schematic diagram of the stirring and arch-breaking component of this utility model.

[0019] This utility model provides a quantitative feeding device for boron-based additives in low-temperature coupled pellet roasting: it includes a frame 101 and a storage bin 102, and also includes a feeding device, which includes a screw feeder 103, a vibrating feeder 104, a weighing sensor 105, a flow control valve 106, a stirring and arch-breaking assembly, and a control assembly. The stirring and arch-breaking assembly includes a stirring blade 108, a rotating shaft 109, a motor 110, and a support component. The support component includes a support cross plate 111 and a support inclined plate 112. The control assembly includes a controller 113 and a human-machine interface 114. An air cannon 115 is also provided on the storage bin 102. Existing quantitative feeding devices have significant shortcomings in terms of precise control, stability, and process adaptability of boron-based additives, making it difficult to meet the stringent requirements of quantitative accuracy and continuity of additives in low-temperature coupled pellet roasting.

[0020] In this embodiment, material feeding is achieved through the storage bin 102, the screw feeder 103, and the vibrating feeder 104. The control component controls the weighing sensor 105 and the flow control valve 106, enabling precise control of material feeding.

[0021] The screw feeder 103 is installed inside the frame 101 and is connected to the bottom of the storage bin 102. The vibrating feeder 104 is installed inside the frame 101 and close to the discharge end of the screw feeder 103. The vibrating feeder 104 is also provided with a discharge pipe 107. The weighing sensor 105 is installed on the discharge pipe 107. The flow control valve 106 is installed on the discharge pipe 107 and close to the weighing sensor 105. The storage bin 102 is made of 304 stainless steel and is equipped with a manually operated flip cover with a sealing rubber gasket. The screw blades in the screw feeder 103 are made of tungsten carbide coated alloy steel. The speed is adjusted by a frequency converter. The vibrating feed plate 104 is made of a 3mm thick stainless steel plate. The weighing sensor 105 is a YZC100 cantilever beam weighing sensor with an accuracy of 0.05%FS and a range of 0-50kg. It is fixed to the ground by a bracket to ensure stable measurement. The flow control valve 106 is an electric butterfly valve. The stirring and arch-breaking component facilitates the breaking of arching phenomena in the storage silo 102. Material feeding is achieved through the storage silo 102, the screw feeder 103, and the vibrating feed plate 104. The control component controls the weighing sensor 105 and the flow control valve 106 to ensure precise control of material feeding.

[0022] Secondly, the motor 110 is installed in the storage bin 102 via the support member; the rotating shaft 109 is fixedly installed on the output shaft of the motor 110; the stirring blade 108 is fixedly installed on the rotating shaft 109, the rotating shaft 109 is welded to the output shaft of the motor 110, and the stirring blade 108 is inclinedly arranged on the rotating shaft 109. The motor 110 is started by the control component, so that the motor 110 drives the rotating shaft 109 to rotate, and the rotating shaft 109 drives the stirring blade 108 to rotate, thereby agitating the material and preventing accumulation.

[0023] Secondly, the support horizontal plate 111 is fixedly installed inside the storage bin 102 and is fixedly connected to the motor 110; the support inclined plate 112 is fixedly installed inside the storage bin 102 and is fixedly connected to the support horizontal plate 111. The support inclined plate 112 is inclinedly arranged at the bottom of the support horizontal plate 111. The cooperation between the support horizontal plate 111 and the support inclined plate 112 facilitates the support of the motor 110.

[0024] Furthermore, the controller 113 is fixedly installed on the outside of the frame 101 and electrically connected to the screw feeder 103, the vibrating feeder 104, the weighing sensor 105, and the motor 110, respectively. The human-machine interface 114 is fixedly installed on the outside of the frame 101 and electrically connected to the controller 113. The controller 113 uses a programmable logic controller 113 (PLC) as the core control unit, possessing powerful data processing and logic operation capabilities. This achieves automated control of the entire quantitative feeding process. Operators can set operating parameters such as the target feed rate of boron-based additives, the rotation speed of the stirring blade 108, and the vibration parameters of the vibrating feeder 104 through the human-machine interface 114. Simultaneously, they can monitor the operating status of the feeding device in real time, including feed weight, motor 110 rotation speed, equipment fault alarms, and other information, facilitating timely adjustment and maintenance of the equipment.

[0025] Finally, the air cannon 115 is fixedly installed at the bottom of the storage silo 102 and electrically connected to the controller 113. The air cannon 115 is circumferentially arranged at the bottom of the storage silo 102, and uses compressed air as its power source. When the controller 113 detects that the material is showing signs of arching or has already arched, it triggers the air cannon 115 to work, instantly releasing high-pressure gas to impact the material, break the arch, and allow the material to slide down smoothly.

[0026] In this embodiment, during use, the boron-based additive is added through the top inlet of the storage silo 102, and the stirring blade 108 continuously stirs to prevent material agglomeration. When production starts, the controller 113 starts the screw feeder 103 according to the preset feed rate and adjusts the speed to initially control the feed rate. The material falls into the vibrating feeder 104, and the electromagnetic vibrator in the vibrating feeder 104 adjusts the vibration parameters to make the material move evenly towards the discharge port and fall into the discharge pipe 107. When the material passes through the weighing sensor 105 on the discharge pipe 107, the weighing sensor 105 transmits the weight signal to the controller 113. The controller 113 compares the target feed rate, and if there is a deviation, it adjusts the opening of the flow control valve 106 to accurately control the feed rate. When the material in the storage silo 102 forms an arch, the air cannon 115 works under the trigger of the controller 113 to break the arch. The operator sets parameters and monitors the equipment operation status through the human-machine interface 114.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A quantitative feeding device for boron-based additives in low-temperature coupled pellet roasting, comprising a frame and a storage silo, wherein the storage silo is fixedly installed on the frame, characterized in that, It also includes a feeding device; The feeding device includes a screw feeder, a vibrating feed plate, a weighing sensor, a flow control valve, a stirring and arch-breaking assembly, and a control assembly. The screw feeder is installed inside the frame and is connected to the bottom of the storage silo. The vibrating feed plate is installed inside the frame and near the discharge end of the screw feeder. The vibrating feed plate is also provided with a discharge pipe. The weighing sensor is installed on the discharge pipe, and the flow control valve is installed on the discharge pipe and near the weighing sensor.

2. The boron-based additive quantitative feeding device for low-temperature coupled pellet roasting as described in claim 1, characterized in that, The stirring and arch-breaking assembly includes stirring blades, a rotating shaft, a motor, and a support component. The motor is installed inside the storage silo via the support component; the rotating shaft is fixedly installed on the output shaft of the motor; and the stirring blades are fixedly installed on the rotating shaft.

3. The boron-based additive quantitative feeding device for low-temperature coupled pellet roasting as described in claim 2, characterized in that, The supporting components include a supporting horizontal plate and a supporting inclined plate. The supporting horizontal plate is fixedly installed inside the storage hopper and is fixedly connected to the motor. The supporting inclined plate is fixedly installed inside the storage hopper and is fixedly connected to the supporting horizontal plate.

4. The boron-based additive quantitative feeding device for low-temperature coupled pellet roasting as described in claim 2, characterized in that, The control components include a controller and a human-machine interface. The controller is fixedly installed on the outside of the frame and electrically connected to the screw feeder, vibrating feeder, weighing sensor and motor respectively. The human-machine interface is fixedly installed on the outside of the frame and electrically connected to the controller.

5. The boron-based additive quantitative feeding device for low-temperature coupled pellet roasting as described in claim 4, characterized in that, The storage silo is also equipped with an air cannon, which is fixedly installed at the bottom of the storage silo and electrically connected to the controller.

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