Improved shaft furnace for metallurgy

Abstract

The utility model relates to the technical field of metallurgical equipment, and discloses an improved shaft furnace for metallurgy, which comprises a base and a circular shaft furnace body arranged above the base, a furnace cover is arranged at the top of the shaft furnace body, an inner wall is arranged in the shaft furnace body, a hearth is arranged between the inner wall and the inner wall of the shaft furnace body, and a furnace cover is arranged on the hearth. A plurality of material distribution openings are formed in the top of the hearth, a plurality of discharging hoppers are arranged on the lower portion of the side face of the hearth, a combustion chamber is arranged on the outer side of the shaft furnace body, a plurality of through grooves are formed between the combustion chamber and the hearth, a plurality of combustion nozzles are installed on the side face of the combustion chamber, and an annular cold air pipeline is installed at the position, above the discharging hoppers, of the outer side of the shaft furnace body. A plurality of air guide pipes communicated with the hearth are arranged on the inner side of the cold air pipeline, and an air inlet pipe is arranged on the outer side of the cold air pipeline. According to the utility model, finished product balls can be cooled, and the condition that the discharging transfer car is damaged due to high temperature is effectively reduced; and the using amount of coal gas can be reduced, energy consumption is reduced, meanwhile, green pellets can be rapidly dried, and the yield is increased.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, specifically an improved vertical shaft furnace for metallurgy. Background Technology

[0002] After the mineral powder is ground into fine powder, it is formed into green pellets of 8-16mm using a pelletizing disc. The green pellets are then fed into a vertical shaft furnace for roasting to produce high-strength pellets, which are then used as raw materials for blast furnaces or submerged arc furnaces. Inside the vertical shaft furnace, the green pellets and the heat source are in a countercurrent state, with the green pellets moving downwards and the hot gas moving upwards.

[0003] However, the existing vertical shaft furnace discharges pellets at high temperatures, which can easily damage the discharge equipment and also consumes a lot of energy, so improvements are needed. Utility Model Content

[0004] The technical problem this invention aims to solve is that the pellets discharged from existing vertical shaft furnaces have a high temperature, which can easily lead to damage to the discharge equipment and high energy consumption.

[0005] To solve the above problems, the technical solution of this utility model is as follows: an improved vertical shaft furnace for metallurgy, comprising a base and a circular vertical shaft furnace body installed above the base. The top of the vertical shaft furnace body is provided with a furnace cover. The interior of the vertical shaft furnace body is provided with an inner wall, and a furnace chamber is provided between the inner wall and the inner wall of the vertical shaft furnace body. The top of the furnace chamber is provided with multiple material feeding ports, and the lower side is provided with multiple material feeding hoppers. The outer side of the vertical shaft furnace body is provided with a combustion chamber, and multiple through slots are provided between the combustion chamber and the furnace chamber. Multiple burners are installed on the side of the combustion chamber. An annular cold air duct is installed on the outer side of the vertical shaft furnace body above the material feeding hopper. The inner side of the cold air duct is provided with multiple air guide pipes connected to the furnace chamber, and the outer side is provided with an air inlet pipe.

[0006] Furthermore, the combustion chamber is arranged around the outside of the vertical furnace body.

[0007] Furthermore, the outside of the vertical furnace body is also equipped with combustion air pipes and gas pipes for supplying air and gas to the burners.

[0008] Furthermore, a discharge trolley is installed on the top of the base outside the vertical furnace body, and a discharge port is opened on the base.

[0009] Furthermore, an annular rail is installed on the top of the base, located on the outside of the vertical furnace body, and the discharge trolley moves along the annular rail.

[0010] The advantages of this invention compared to existing technologies are as follows: This invention delivers cold air to the lower part of the furnace through cold air ducts and gas guide pipes, which can cool the finished pellets and effectively reduce the damage to the discharge turntable caused by high temperature; secondly, after the cold air is transformed into hot air, it carries the heat to the upper part, thereby reducing the amount of gas used and energy consumption, and the hot air can quickly dry the green pellets and increase the output. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present invention.

[0012] As shown in the figure: 1. Base; 2. Vertical furnace body; 3. Furnace cover; 4. Inner wall; 5. Furnace chamber; 6. Charging port; 7. Charging hopper; 8. Combustion chamber; 9. Burner nozzle; 10. Cold air duct; 11. Gas guide pipe; 12. Combustion air duct; 13. Gas duct; 14. Discharge turntable. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1 As shown, an improved vertical shaft furnace for metallurgy includes a base 1 and a circular vertical shaft furnace body 2 mounted above the base 1. The top of the vertical shaft furnace body 2 is provided with a furnace cover 3. The interior of the vertical shaft furnace body 2 is provided with an inner wall 4. A furnace chamber 5 is provided between the inner wall 4 and the inner wall of the vertical shaft furnace body 2. The top of the furnace chamber 5 is provided with multiple material feeding ports 6, and the lower side is provided with multiple material feeding hoppers 7. The outside of the vertical shaft furnace body 2 is provided with a combustion chamber 8, which is arranged around the outside of the vertical shaft furnace body 2 and has a through groove between it and the furnace chamber 5. Multiple burners 9 are installed on the side of the combustion chamber 8. Combustion air pipes 12 and gas pipes 13 for supplying air and gas to the burners 9 are also installed on the outside of the vertical shaft furnace body 2.

[0015] Green pellets are fed into the furnace 5 through the feeding port 6. The burner 9 is opened, and the high-temperature gas flow generated by the combustion of gas in the combustion chamber 8 enters the furnace 5 through the channel to roast the green pellets.

[0016] An annular cold air duct 10 is installed on the outside of the vertical furnace body 2 above the feeding hopper 7. The cold air duct 10 has multiple air guide pipes 11 connected to the furnace chamber 5 on its inner side and an air inlet pipe on its outer side.

[0017] The air inlet pipe is connected to an external blower. After entering the cold air duct 10, the cold air enters the furnace 5 through the air guide pipe 11. The cold air cools the finished pellets after roasting. At the same time, the temperature of the cold air rises to form hot air. The hot air rises and carries the heat up, increasing the temperature of the upper part of the furnace 5. The hot air can also dry the raw pellets.

[0018] The base 1 is equipped with a discharge turntable 14 on the outside of the vertical furnace body 2, and the base 1 is provided with a discharge port. The base 1 is equipped with a ring rail on the outside of the vertical furnace body 2, and the discharge turntable 14 moves along the ring rail.

[0019] When the discharge turntable 14 rotates to the corresponding position of the discharge hopper 7, the discharge hopper 7 is opened, and the pellets can be discharged into the discharge turntable 14. When the discharge turntable 14 moves to the discharge port, the pellets can be discharged into the discharge pit through the discharge port.

[0020] In practical use, the high-temperature airflow generated by combustion in the combustion chamber 8 enters the furnace 5 through the through-slot to roast the green pellets. Cold air is delivered to the lower part of the furnace 5 through the cold air pipe 10 and the gas guide pipe 11, which can cool down the finished pellets and effectively reduce the damage to the discharge turntable 14 caused by high temperature. Secondly, after the cold air turns into hot air, it carries the heat to the upper part, which can reduce the amount of gas used and reduce energy consumption. Moreover, the hot air can quickly dry the green pellets and increase the output.

[0021] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An improved vertical shaft furnace for metallurgy, comprising a base (1) and a circular furnace body (2) mounted above the base (1), the furnace body (2) having a furnace cover (3) on its top, characterized in that: The vertical furnace body (2) has an inner wall (4) inside, and a furnace chamber (5) is provided between the inner wall (4) and the inner wall of the vertical furnace body (2). The furnace chamber (5) has multiple material feeding ports (6) at the top and multiple feeding hoppers (7) at the lower side. The vertical furnace body (2) has a combustion chamber (8) on the outside. Multiple through slots are provided between the combustion chamber (8) and the furnace chamber (5), and multiple burners (9) are installed on the side of the combustion chamber (8). An annular cold air duct (10) is installed above the feeding hopper (7) on the outside of the vertical furnace body (2). Multiple air guide pipes (11) connected to the furnace chamber (5) are provided inside the cold air duct (10), and an air inlet pipe is provided on the outside.

2. An improved vertical shaft furnace for metallurgy according to claim 1, characterized in that: The combustion chamber (8) is arranged around the outside of the vertical furnace body (2).

3. An improved vertical shaft furnace for metallurgy according to claim 1, characterized in that: The outside of the vertical furnace body (2) is also equipped with a combustion air duct (12) and a gas duct (13) for supplying air and gas to the burner (9).

4. An improved vertical shaft furnace for metallurgy according to claim 1, characterized in that: The base (1) is equipped with a discharge turntable (14) on the outside of the vertical furnace body (2) and a discharge port is provided on the base (1).

5. An improved vertical shaft furnace for metallurgy according to claim 4, characterized in that: The base (1) is equipped with an annular rail located outside the vertical furnace body (2) on its top, and the discharge turntable (14) moves along the annular rail.

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