Storage device for storing DRI cold pressing balls of rotary hearth furnace

Abstract

The utility model relates to the technical field of DRI cold pressing ball storage, in particular to a storage device for storing DRI cold pressing balls of a rotary hearth furnace, which comprises an outer bin wall and an inner bin wall, a hydraulic valve capable of closing or opening an opening is rotatably arranged at the bottom of the inner bin wall, and one end of a smoke inlet pipeline extends into the inner bin wall and forms an included angle of 120 degrees with the inner bin wall. The inner space of the inner bin wall serves as the main storage space of the DRI cold pressing balls, namely, a storage mode is used for replacing a traditional paving mode, white fog generated in the paving process is effectively reduced, and the DRI cold pressing balls can be effectively prevented from emitting pungent smells to pollute the environment; furthermore, flue gas is introduced into the storage space in the inner bin wall through a flue gas inlet pipeline, and the dehydration process of the DRI cold-pressed balls is accelerated through high-temperature airflow, so that the strength improvement time of the DRI cold-pressed balls is shortened, and the strength of the cold-pressed balls is rapidly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of DRI cold-pressed balls storage, and in particular to a storage device for storing DRI cold-pressed balls of a rotary hearth furnace. Background Art

[0002] The rotary hearth furnace is a process that utilizes the different boiling points of metal elements to separate and purify various metal elements. It includes units such as pelletizing, reduction, flue gas treatment, and dust recovery. The process reduces pellets made from metallurgical dust into DRI (direct reduced iron) pellets in a high-temperature reducing atmosphere. However, some pellets will become powdered during the production and transportation process, which is called DRI powder. These powders can also be pressed into DRI cold-pressed balls by adding binders and water and using a pellet press.

[0003] Among them, pellet strength is the most important product quality requirement for DRI cold-pressed balls. According to production practice and pellet strength mechanism, the strength of DRI cold-pressed balls will gradually increase with the decrease of moisture content. Therefore, DRI cold-pressed balls are usually spread in greenhouses and the moisture is naturally evaporated for 24 hours to increase the pellet strength. During this process, the moisture content of DRI cold-pressed balls will generally drop from 9% to 1%. However, the spreading and volatilization process takes a long time, resulting in a slow increase in the strength of DRI cold-pressed balls. In addition, the moisture evaporated during the process will produce white mist when it encounters cold. At the same time, the DRI cold-pressed balls themselves will also emit a pungent odor, which is not conducive to the environmental management in the greenhouse.

[0004] Therefore, it is necessary to invent a storage device for storing DRI cold-pressed balls from a rotary hearth furnace to solve the above problems. Utility Model Content

[0005] In order to address the deficiencies of the prior art, the purpose of the utility model is to provide a storage device for storing DRI cold-pressed balls from a rotary hearth furnace, which solves the problem in the prior art that the spreading and volatilization process takes a long time, resulting in a slow increase in the strength of the DRI cold-pressed balls, and the water volatilized in the process will produce white mist when it is cooled. At the same time, the DRI cold-pressed balls themselves will also emit a pungent odor, which is not conducive to the environmental management in the shed.

[0006] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0007] A storage device for storing DRI cold-pressed balls from a rotary hearth furnace, comprising a storage body, the storage body being supported by a support frame, the storage body comprising an outer storage wall arranged around an inner storage wall and capable of passing cooling water to heat the inner storage wall, the inner storage wall being an inverted conical structure, the interior of the inner storage wall being a storage space, and an opening being provided at the bottom of the inner storage wall, a hydraulic valve being rotatably provided at the bottom of the inner storage wall for closing or opening the opening, and one end of a smoke inlet pipe being inserted into the inner storage wall and forming an angle of 120 degrees with the inner storage wall.

[0008] As a preferred solution of the utility model, a transmission component capable of transporting DRI cold-pressed balls to the storage space inside the inner warehouse wall is arranged on the upper side of the warehouse body.

[0009] As a preferred solution of the utility model, a material guide bin is installed at the end of the transmission component, and the lower part of the material guide bin is connected to the interior of the bin body (inside the inner bin wall). The material guide bin can force the DRI cold-pressed balls to fall longitudinally into the interior of the bin body.

[0010] As a preferred solution of the present utility model, the material of the outer warehouse wall is cement, and the material of the inner warehouse wall is steel plate.

[0011] As a preferred solution of the utility model, the inner side wall of the outer warehouse wall is installed with a membrane wall fin tube, and the membrane wall fin tube constitutes a heating wall. Cooling water can be passed into the membrane wall fin tube to heat the outer warehouse wall, and the outer warehouse wall and the heating wall form a double-layer structure.

[0012] As a preferred solution of the utility model, one end of the smoke outlet pipe is connected to the interior of the bin body, and one end of the smoke outlet pipe is located at one side of the material guide bin.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] In the utility model, cooling water is introduced into the outer warehouse wall to increase the temperature of the inner peripheral side wall of the outer warehouse wall, thereby preventing the evaporated water in the DRI cold-pressed balls from condensing on the inner peripheral side wall of the outer warehouse wall, thereby preventing the condensed water from dripping along the outer warehouse wall and contacting the DRI cold-pressed balls again to cause the DRI cold-pressed balls to agglomerate; at the same time, the internal space of the inner warehouse wall serves as the main storage space for the DRI cold-pressed balls, that is, the storage method is used to replace the traditional paving method, which effectively reduces the generation of white mist during the paving process and can also effectively prevent the DRI cold-pressed balls from emitting irritating odors and polluting the environment; further, smoke is introduced into the storage space inside the inner warehouse wall through a smoke inlet pipe, and the high-temperature airflow is used to accelerate the dehydration process of the DRI cold-pressed balls, thereby shortening the strength improvement time of the DRI cold-pressed balls, and then quickly improving the strength of the cold-pressed balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall planar structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the storage body in the utility model;

[0017] Figure 3 It is a schematic diagram of a partial planar structure of the utility model;

[0018] Figure 4It is a schematic diagram of the planar structure of the membrane wall fin tube of the utility model.

[0019] Description of reference numerals:

[0020] 1. Outer silo wall; 2. Inner silo wall; 3. Transmission component; 4. Smoke inlet pipe; 5. Smoke outlet pipe; 6. Hydraulic valve; 7. Membrane wall fin tube; 8. Material guide silo; 9. Silo body; 10. Support frame. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0022] The utility model provides Figure 1-Figure 4 A storage device for storing DRI cold-pressed balls of a rotary hearth furnace is shown in common. A bin body 9 is installed overhead and supported by a support frame 10. The areas above and below the bin body 9 serve as operating areas for staff. The bin body 9 includes an outer bin wall 1 which is arranged around an inner bin wall 2 and can be filled with cooling water to heat the inner bin wall 2. The inner bin wall 2 is an inverted conical structure. The interior of the inner bin wall 2 is a storage space, and an opening is provided at the bottom of the inner bin wall 2. A hydraulic valve 6 which can close or open the opening is rotatably provided at the bottom of the inner bin wall 2. One end of the smoke inlet pipe 4 penetrates deep into the inner bin wall 2. The smoke inlet pipe 4 can introduce the flue gas of the rotary hearth furnace into the storage space inside the inner bin wall 2. One end of the smoke inlet pipe 4 forms an angle of 120 degrees with the inner bin wall 2 to prevent the fallen DRI cold-pressed balls from blocking the airway. The transmission component 3 transports the DRI cold-pressed balls to the interior of the outer bin wall 1. Under the material guide restriction of the material guide bin 8, many DRI cold-pressed balls fall longitudinally into the storage space inside the inner bin wall 2 to complete the storage.

[0023] As shown in 2 , a transmission component 3 is provided on the upper side of the warehouse body 9 , which can transport the DRI cold-pressed balls to the storage space inside the inner warehouse wall 2 . The transmission component 3 is generally a belt or a conveyor belt, which transports the DRI cold-pressed balls to the inner warehouse wall 2 .

[0024] like Figure 2 As shown, a guide bin 8 is installed at the end of the transmission component 3, and the lower part of the guide bin 8 is connected to the interior of the bin body 9 (the interior of the inner bin wall 2). The guide bin 8 can force the DRI cold-pressed balls to fall vertically to enter the storage space inside the inner bin wall 2. The material of the outer bin wall 1 is cement, and the material of the inner bin wall 2 is steel plate.

[0025] like Figure 4 As shown, the inner side wall of the outer warehouse wall 1 is installed with a membrane wall fin tube 7, and the membrane wall fin tube 7 constitutes a heating wall. Cooling water can be passed into the membrane wall fin tube 7 to heat the outer warehouse wall 1, and the outer warehouse wall 1 and the heating wall form a double-layer structure.

[0026] like Figure 2 As shown, one end of the smoke outlet pipe 5 is connected to the interior of the silo 9, and one end of the smoke outlet pipe 5 is located on one side of the guide silo 8. The smoke inlet pipe 4 introduces smoke into the storage space inside the inner silo wall 2. The smoke comes from the 80-90°C smoke discharged after treatment in the rotary hearth furnace and is used to dry the DRI cold-pressed balls. The moisture content of the DRI cold-pressed balls can be reduced from 9% to 1% within 8 hours. Finally, the smoke escapes from the smoke outlet pipe 5.

[0027] In the utility model, cooling water is introduced into the outer warehouse wall 1 to increase the temperature of the inner peripheral side wall of the outer warehouse wall 1, thereby preventing the evaporated water in the DRI cold-pressed balls from condensing on the inner peripheral side wall of the outer warehouse wall 1, thereby preventing the condensed water from dripping along the outer warehouse wall 1 and contacting the DRI cold-pressed balls again to cause the DRI cold-pressed balls to agglomerate; at the same time, the internal space of the inner warehouse wall 2 serves as the main storage space for the DRI cold-pressed balls, that is, the storage method is used to replace the traditional paving method, which effectively reduces the generation of white mist during the paving process and can also effectively prevent the DRI cold-pressed balls from emitting irritating odors and polluting the environment; further, the smoke inlet pipe 4 is used to introduce smoke into the internal storage space of the inner warehouse wall 2, and the high-temperature airflow is used to accelerate the dehydration process of the DRI cold-pressed balls, thereby shortening the strength improvement time of the DRI cold-pressed balls, and then quickly improving the strength of the cold-pressed balls.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A storage device for storing DRI cold pressed balls from a rotary hearth furnace. Features: The invention comprises a warehouse body (9), wherein the warehouse body (9) comprises an outer warehouse wall (1) arranged around an inner warehouse wall (2) and capable of passing cooling water to heat the inner warehouse wall (2); the inner warehouse wall (2) is in an inverted conical structure; the interior of the inner warehouse wall (2) is a storage space; an opening is provided at the bottom of the inner warehouse wall (2); a hydraulic valve (6) capable of closing or opening the opening is rotatably provided at the bottom of the inner warehouse wall (2); one end of a smoke inlet pipe (4) penetrates into the inner warehouse wall (2) and forms an angle of 120 degrees with the inner warehouse wall (2).

2. A storage device for storing DRI cold pressed balls from a rotary hearth furnace according to claim 1, Features: A transmission component (3) capable of transporting DRI cold-pressed balls to the storage space inside the inner warehouse wall (2) is arranged on the upper side of the warehouse body (9).

3. A storage device for storing DRI cold pressed balls from a rotary hearth furnace according to claim 2, Features: A material guide bin (8) is installed at the top of the bin body (9) at a position where the end of the transmission component (3) is adapted, and the material guide bin (8) can force the DRI cold-pressed balls to fall vertically.

4. A storage device for storing DRI cold pressed balls from a rotary hearth furnace according to claim 1, Features: The material of the outer warehouse wall (1) is cement, and the material of the inner warehouse wall (2) is steel plate.

5. A storage device for storing DRI cold pressed balls from a rotary hearth furnace according to claim 1, Features: The inner side wall of the outer warehouse wall (1) is installed with a membrane wall fin tube (7), and the membrane wall fin tube (7) constitutes a heating wall. Cooling water can be passed into the membrane wall fin tube (7) to heat the outer warehouse wall (1), and the outer warehouse wall (1) and the heating wall form a double-layer structure.

6. A storage device for storing DRI cold pressed balls from a rotary hearth furnace according to claim 1, Features: The smoke outlet pipe (5) is in communication with the interior of the bin body (9), and one end of the smoke outlet pipe (5) is located on one side of the material guide bin (8).

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