Heating mechanism for a furnace body and a smelting furnace having the same

Abstract

This utility model provides a heating mechanism for a furnace body and a furnace having the heating mechanism. The heating mechanism includes a heat storage body, a reversing valve, a burner, a blower, and a gas delivery component. Two heat storage bodies are installed corresponding to two superheating holes on the furnace body. The reversing valve has four valve ports with internal valve stops. Three of the valve ports are connected to the top chambers of the two heat storage bodies and the blower, respectively, and the remaining valve ports serve as exhaust valve ports. Two burners are installed in the bottom chambers of the two heat storage bodies. The blower is used to blow air, allowing the airflow to pass through the reversing valve and enter the bottom chamber of the heat storage body from the top chamber, providing combustion air to the burners in the bottom chamber. The gas delivery component connects to the burners. The valve stops are used to switch the air intake of the blower to the two heat storage bodies. A furnace with this heating mechanism helps reduce furnace costs and can store and release heat from the discharged waste gas. The stored heat is absorbed in the heat storage body, and the released heat is brought back into the furnace, achieving full utilization of the heat from the waste gas.

Description

Technical Field

[0001] This utility model relates to the field of furnace technology, and in particular to a heating mechanism for a furnace body and a furnace having the heating mechanism. Background Technology

[0002] A furnace is an industrial furnace used to melt solid metal into a liquid state. The molten metal is then placed into a mold for casting. Gas-fired furnaces typically consist of a crucible mounted on the furnace chamber. Burners are installed on the furnace walls, with their ignition points extending into the furnace chamber. Combustion of gas at the burner's ignition point heats the furnace chamber, thereby heating the crucible and melting the metal inside. Current burners are generally connected to gas and air pipes. Gas is supplied through the gas pipe, and air is supplied through the air pipe. The mixture is then ignited at the burner's ignition point. The gas pipe connects to a gas cylinder or a public gas pipeline, while the air pipe connects to a combustion fan to supply air to the air pipe. When it is necessary to utilize the waste heat from the furnace chamber, an exhaust fan is installed to transport the waste heat to a location for heat storage or utilization. Clearly, this type of waste heat utilization gas-fired furnace requires at least two types of fans, which is detrimental to reducing furnace manufacturing costs and increases the complexity of the furnace's structural layout. Utility Model Content

[0003] In view of the above, the present invention provides a heating mechanism for the furnace body that is beneficial to reducing the cost of the furnace.

[0004] The technical solution involved in this utility model is:

[0005] A heating mechanism for a furnace body includes a heat storage body, a reversing valve, a burner, a blower, and a gas delivery component;

[0006] There are two heat storage bodies, which are installed to correspond to the two superheating holes on the furnace body. The heat storage body includes a heat collector, a top cavity formed at the upper end of the heat collector, and a bottom cavity formed at the lower end of the heat collector. Gas flows through the top cavity and the bottom cavity through the heat collector, and the bottom cavity is used to connect with the superheating holes on the furnace body.

[0007] The reversing valve has four valve ports and internal valve stops. Three of the valve ports are connected to the top chambers of the two heat storage bodies and the blower, respectively, and the remaining valve ports are used as exhaust valve ports.

[0008] There are two burners, each installed in the bottom cavity of one of the two heat storage bodies.

[0009] The blower is used to blow air, so that the airflow passes through the reversing valve and enters the bottom cavity of the heat accumulator from the top cavity of the heat accumulator, providing combustion air to the burner in the bottom cavity;

[0010] The gas delivery component connects to the burner to supply gas to the burner;

[0011] The valve is used to switch the air supply from the blower to the two heat storage bodies.

[0012] Furthermore, the heating mechanism includes a reversing sensing mechanism, which includes a reversing temperature sensor disposed in the exhaust port of the reversing valve. The reversing temperature sensor is used to detect the temperature of the discharged exhaust gas, and the valve switches when the exhaust gas temperature reaches a preset value.

[0013] Furthermore, the gas delivery component includes a gas pipe and a gas control valve. The gas pipe is a three-way pipe, including a main pipe and two branch pipes connected to one end of the main pipe. The main pipe is connected to a gas source, and the two branch pipes are connected to two burners respectively. There are two gas control valves installed on the two branch pipes to control the on / off state of the branch pipes.

[0014] Furthermore, the burner includes a burner body and an ignition nozzle installed at one end of the burner body. The burner body is connected to a gas delivery component, and the ignition nozzle faces the corresponding superheating hole.

[0015] This invention also provides a furnace having the heating mechanism.

[0016] A furnace includes a furnace body and a crucible. The furnace body has a furnace chamber with an opening at the top. The crucible seals the opening end of the furnace chamber and extends into the furnace chamber. Two superheating holes are opened on the furnace wall of the furnace body to connect to the furnace chamber. One of the two superheating holes serves as an air inlet and the other as an exhaust outlet. The furnace also includes the aforementioned heating mechanism. Two heat storage bodies of the heating mechanism are fixedly installed on the outer periphery of the furnace body, corresponding to the two superheating holes respectively. A through hole is opened on the bottom cavity wall of the heat storage body to connect the bottom cavity to the superheating hole, thereby connecting the bottom cavity to the furnace chamber.

[0017] Furthermore, the furnace body is provided with a leakage monitoring structure, which includes a drain pipe installed on the side wall of the furnace body and a monitoring sensor installed inside the drain pipe. One end of the drain pipe extends through the side wall of the furnace chamber to the bottom surface of the furnace chamber, and the other end extends out of the furnace body.

[0018] Furthermore, the leakage monitoring structure also includes a cap installed at the outer port of the drain pipe, the cap being hinged to the port of the drain pipe.

[0019] Furthermore, the furnace also includes a control system for controlling the operation of the heating mechanism, so that the two burners are used alternately.

[0020] Furthermore, the furnace includes an iron melting furnace, an aluminum melting furnace, and a zinc melting furnace.

[0021] Furthermore, a partition wall is formed on the bottom surface of the furnace chamber to form a heat conduction path around the outer periphery of the crucible, so that hot gas introduced from one superheating hole is discharged from another superheating hole after passing through the heat conduction path.

[0022] Compared to existing technologies, the heating mechanism provided by this invention, by installing the burner within the bottom cavity of the regenerator, only requires a gas source to supply gas to the burner. Air is supplied to the lower chamber via a fan connected to a reversing valve, thus providing combustion air to the ignition end of the burner body. The fan connected to the reversing valve simultaneously propels the airflow into the furnace and facilitates heat exchange for waste heat utilization. Compared to traditional burners that require a separate combustion air fan to supply air to the burner body, this design saves on the number of fans, simplifies the structure, and reduces manufacturing costs. The furnace equipped with this heating mechanism, through its coordination with the furnace body, significantly improves the efficiency of waste heat utilization in the exhaust gas. Attached Figure Description

[0023] Figure 1 This is a perspective view of the energy-saving gas-fired zinc melting furnace of this utility model;

[0024] Figure 2 This is a partial cross-sectional view of the furnace body;

[0025] Figure 3 for Figure 1 A cross-sectional view;

[0026] Figure 4 A view of an energy-saving gas-fired zinc melting furnace without the crucible installed;

[0027] Figure 5 A view of the heat exchange structure of an energy-saving gas-fired zinc melting furnace;

[0028] Figure 6 This is a schematic diagram of a directional control valve;

[0029] Figure 7 This is a structural diagram of two heat storage bodies.

[0030] The following labels are shown in the attached diagram:

[0031] Furnace body 1, crucible 2, heating mechanism 3, furnace chamber 11, furnace chamber opening 111, partition wall 112, gas outlet 113, superheating hole 12, heat insulation wall 116, heat storage body 31, reversing valve 32, burner 33, blower 34, gas conveying component 35, heat collector 311, top cavity 312, bottom cavity 313, valve stop 321, valve stop drive component 322, baffle 323, burner body 331, air guide pipe 341, gas pipe 351, gas control valve 352, electrical control cabinet 41, drain pipe 114, cover 115. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention.

[0033] Please see Figures 1-6 This utility model provides an energy-saving gas-fired furnace, such as an aluminum melting furnace or a zinc melting furnace, including a furnace body 1, a crucible 2, and a heating mechanism 3. The furnace body 1 has a furnace chamber 11 with an opening at the top. The crucible 2 is sealed against the opening end of the furnace chamber 11 and the body of the crucible 2 extends into the furnace chamber 11. The heating mechanism 3 is installed on the outer periphery of the furnace body 1 and communicates with the furnace chamber 11 to heat the furnace chamber 11, thereby heating the crucible 2.

[0034] A furnace opening 111 is formed at the top of the furnace chamber 11, and a partition wall 112 is formed on the bottom surface of the furnace chamber 11. One end of the partition wall 112 is connected to the wall surface of one end of the furnace chamber 11, and the other end extends to the other end of the furnace chamber 11 without connecting to the other end of the furnace chamber 11, forming a gas outlet 113. The crucible 2 is installed in the furnace chamber 11 through the furnace opening 111, and the crucible 2 closes the furnace opening 111. The bottom surface of the crucible 2 is pressed against the partition wall 112, and there is a gap between the circumference of the crucible 2 and the circumference of the furnace chamber 11. Overheating holes 12 are opened on the circumference of the furnace body 1 on both sides corresponding to the partition wall 112. In this way, a heat conduction channel is formed around the outer circumference of the crucible 2 in the furnace chamber 11. Hot gas is sent in from the overheating hole 12 on one side, passes through the heat conduction channel, and comes out from the overheating hole 12 on the other side. That is, the hot gas passes around the crucible 2 and fully heats the crucible 2.

[0035] Understandably, a heat insulation wall 116 is formed inside the furnace 11 between the two superheating holes 12. The bottom end of the heat insulation wall 116 is installed on the partition wall 112 and extends to the furnace opening 111. It connects the outer side of the crucible 2 peripheral wall and the inner wall of the furnace 11 to prevent the hot gas from flowing along the heat conduction path when the two superheating holes 12 are connected at the near end.

[0036] The heating mechanism 3 includes a heat storage body 31, a reversing valve 32, a burner 33, a blower 34, and a gas delivery component 35. Two heat storage bodies 31 are fixedly installed on the outer periphery of the furnace body 1, corresponding to two superheating holes 12. Each heat storage body 31 includes a heat collector 311, a top cavity 312 formed at the upper end of the heat collector 311, and a bottom cavity 313 formed at the lower end of the heat collector 311. The heat collector 311 is made of a heat-resistant material with excellent heat absorption properties and has tortuous airflow channels inside, allowing gas to circulate between the top cavity 312 and the bottom cavity 313, thus enabling the heat collector 311 to absorb or release heat. In this embodiment, the heat collector 311 is made of heat-resistant mortar with honeycomb pores. Through holes are opened on the wall of the bottom cavity 313 of the heat storage body 31, connecting with the superheating holes 12, thereby communicating the bottom cavity 313 with the furnace chamber 11. Please refer to... Figure 7 In this embodiment, preferably, the two heat storage bodies 31 are connected at the bottom to form a whole, which facilitates the overall assembly on the side of the furnace body 1.

[0037] The reversing valve 32 is a four-way valve with an internal valve stop 321. A valve stop drive component 322 is installed on the reversing valve 32 to drive the valve stop 321 to switch. The valve ports on both sides of the reversing valve 32 are respectively connected to the top chambers 312 of the two heat storage bodies 31. The lower valve port is connected to the blower 34, and the upper valve port is left empty, serving as an exhaust valve port for discharging exhaust gas. Understandably, a baffle 323 can be installed at the top of the exhaust valve port to prevent dust from entering the reversing valve 32 and to disperse the discharged exhaust gas.

[0038] Valve 321 has two switching positions. For clarity, the two heat storage bodies 31 are referred to as the first heat storage body and the second heat storage body, and the two air guide holes 112 are referred to as the first superheating hole and the second superheating hole. The first heat storage body is connected to the first superheating hole, and the second heat storage body is connected to the second superheating hole. In the first switching position, valve 321 connects the valve port connected to the blower 34 to the valve port connected to the top cavity 312 of the first heat storage body, and separates the valve port connected to the top cavity 312 of the second heat storage body and the exhaust valve port. After switching to the second switching position, the valve port connected to the blower 34 connects to the valve port connected to the top cavity 312 of the second heat storage body, and separates the valve port connected to the top cavity 312 of the first heat storage body and the exhaust valve port.

[0039] There are two burners 33, each installed in the bottom cavity 313 of the heat storage body 31. Each burner 33 includes a burner body 331 and an ignition nozzle (not shown) installed at one end of the burner body 331. The burner body 331 is connected to a gas delivery component 35 to supply gas to the burner body 331. The ignition nozzle faces the superheating hole 12. After ignition, the gas is sprayed towards the superheating hole 12, and the heat generated by the flame enters the furnace 11. When one burner 33 is in use, while the other burner 33 is activated and blowing hot gas through the corresponding superheating hole 12, the other burner 33 is not activated. The superheating hole 12 on the other side is used to exhaust exhaust gas. The two burners 33 are used alternately, always maintaining a one-on-one cycle.

[0040] The blower 34 is used to blow air into the valve port of the corresponding reversing valve 32. When the blower 34 is connected to the first heat storage body, the blown air enters the bottom cavity 313 from the top cavity 312 of the first heat storage body, providing combustion air to the burner 33 in the bottom cavity 313. Thus, the gas ejected from the ignition nozzle of the burner 33 can be ignited to form a hot gas flow. The hot gas flow enters the furnace 11 through the first superheating hole to heat the crucible 2. The hot gas flow flows along the heat conduction passage in the furnace 11 and flows out from the second superheating hole, enters the bottom cavity 313 of the second heat storage body, then flows into the top cavity 312 of the second heat storage body, and then enters the reversing valve 32, and is discharged from the exhaust valve port of the reversing valve 32. During this process, the second heat storage body stores heat for the exhaust gas flowing out of the furnace 11.

[0041] When switching valve 321 connects the blower 34 to the second heat storage body, the blown air enters the bottom cavity 313 of the second heat storage body from the top cavity, providing combustion air to the burner 33 in the bottom cavity 313. The burner 33 ignites the gas to form a hot airflow. The hot airflow enters the furnace 11 through the second superheating hole to heat the crucible 2. The hot airflow flows along the heat conduction path in the furnace 11 and flows out from the first superheating hole, entering the bottom cavity 313 of the first heat storage body, then flowing into the top cavity 312 of the first heat storage body, and then entering the reversing valve 32, and is discharged from the exhaust valve port of the reversing valve 32. During this process, the heat stored in the second heat storage body can preheat the blown air, and the heat is carried into the furnace 11. The first heat storage body stores heat for the exhaust gas flowing out of the furnace 11.

[0042] In this way, by repeatedly switching valve 321, the utilization of waste heat can be fully improved. The switching timing can be selected after the heat storage body 31 has accumulated sufficient heat, or by switching when the waste heat temperature reaches a preset value, or by switching after setting a fixed duration of air supply. Thus, heat can be repeatedly stored in two heat storage bodies, and the stored heat can be sent back to the furnace for reuse, greatly improving the energy-saving effect.

[0043] In this embodiment, the valve 321 is switched by monitoring the exhaust gas temperature. The heating mechanism 3 includes a reversing sensing mechanism, which includes a reversing temperature sensor installed in the exhaust gas outlet of the reversing valve 32. When the reversing temperature sensor detects that the temperature of the exhaust gas reaches a preset value, the valve 321 is rotated to switch the gas path.

[0044] The blower 34 can be installed between the two heat storage bodies 31, which facilitates spatial layout. In this embodiment, the blower 34 is fixedly installed on the bottom side of the outer peripheral wall of the furnace body 1 and is connected to the downward-facing valve port of the reversing valve 32 through a guide pipe 341.

[0045] The gas delivery component 35 supplies gas to the two burners 33. The gas delivery component 35 includes a gas pipe 351 and gas control valves 352. The gas pipe 351 is a three-way pipe, including a main pipe and two branch pipes connected to one end of the main pipe. The main pipe connects to the gas source, and the two branch pipes are correspondingly connected to the burner bodies 331 of the two burners 33. There are two gas control valves 352, installed on the two branch pipes, to control the opening and closing of the branch pipes and alternately supply gas to the two burners 33. Specifically, when one gas control valve 352 is open, gas is supplied to the corresponding burner 33, and the other gas control valve 352 is closed. When each burner 33 is in use, air is supplied by a blower 34 and gas is supplied through the corresponding branch pipe. After ignition, the combustion generates hot gas which enters the furnace 11.

[0046] Understandably, the zinc melting furnace also includes a control system for controlling the operation of the heating mechanism 3. The control system includes an electrical control cabinet 41 for controlling the switching of the reversing valve 32, the start and stop of the burner 33, the start and stop of the blower 34, and the start and stop of the gas delivery component 35, etc.

[0047] Furthermore, a leakage detection structure is installed on the furnace body 1 to prevent molten metal from entering the furnace chamber after the crucible breaks without timely detection, which could damage the furnace body 1. The leakage detection structure includes a drain pipe 114 installed on the side wall of the furnace body 1 and a monitoring sensor (not shown in the figure) installed inside the drain pipe 114. One end of the drain pipe 114 extends through the side wall of the furnace chamber 11 to the bottom surface of the furnace chamber 11, and the other end extends outside the furnace body 1. When the crucible 2 cracks and molten metal flows into the furnace chamber 11, it will flow into the drain pipe 114. The monitoring sensor will detect the presence of molten metal in the drain pipe 114 and will promptly sound an alarm. Moreover, the molten metal in the furnace chamber 11 can be discharged through the drain pipe 114, preventing it from accumulating in the furnace chamber 11 and damaging the furnace chamber 11 or obstructing the flow of hot gas within the furnace chamber 11. Furthermore, the leakage monitoring structure also includes a cover 115 installed at the outer port of the drain pipe 114. The cover 115 is hinged at the port of the drain pipe 114 to close the drain pipe 114 under normal conditions to prevent hot gas leakage from the furnace 11.

[0048] In summary, the heating mechanism provided by this utility model is installed on one side of the furnace body. It uses a heat storage body as the passage for air intake and exhaust gas discharge from the furnace. After the exhaust gas is discharged from the furnace, it passes through the heat storage body for discharge. The heat storage body stores heat. After the heat storage body reaches the preset value of the heat storage temperature, the heat storage body is changed to be the passage for air intake. The heat stored in the heat storage body heats the incoming air. The heat of the heat storage body is carried into the furnace. The heat storage body releases heat and cools down. That is, the heat stored in the heat storage body can be carried back to the furnace through the exhaust gas discharge. In the whole process, by setting two heat storage bodies to work together, the utilization of waste heat in the exhaust gas is greatly improved.

[0049] Furthermore, by installing the burner 33 in the bottom cavity 313 of the regenerator 31, the burner body 331 only needs to be supplied with gas through a gas source and air is supplied to the lower chamber through a fan connected to the reversing valve. This allows combustion air to be supplied to the ignition end of the burner body. When the ignition end is ignited, the air flows to the air guide hole, driving the flame to spray through the air guide hole, thereby heating the furnace. Compared with traditional burners that require an additional combustion air fan to supply air to the burner body, this method saves the number of fans, simplifies the structure, and saves costs.

[0050] By using a reversing valve 32 with four ports, two ports are used in conjunction with two heat storage bodies, and the other port is connected to a blower 34. A reserved port is provided for exhaust gas discharge. The burners 31 in the two heat storage bodies are used alternately, one on and one off, so that the superheating hole 12 on one side is used to send the ignition into the furnace 11, while the superheating hole 12 on the other side is used to discharge the exhaust gas. The heat storage body 31 stores the heat of the discharged exhaust gas and releases the heat when the air is introduced, which is then brought back into the furnace 11. This achieves full utilization of the heat of the exhaust gas and achieves the best energy-saving effect.

[0051] Understandably, the heating mechanism 3 described above is not only applicable to zinc melting furnaces, but can be used in all furnace structures.

[0052] Understandably, the two superheating holes 12 can correspond to the heating air inlet and the exhaust air outlet on the furnace body 1.

[0053] The aforementioned heating mechanism 3 is applicable to various furnace body structures. By placing one heat storage body of the heating mechanism 3 at the air inlet end of the furnace and connecting it to the furnace, and placing the other heat storage body at the exhaust gas outlet end of the furnace and connecting it to the furnace, heat can be supplied to the furnace from the air inlet end and exhaust gas can be discharged from the exhaust end, or heat can be supplied from the exhaust end and exhaust gas can be discharged from the air inlet end. As for the path of the heat conduction passage in the furnace, it can be set as needed. The heat conduction passage can be a looping path as in this embodiment, or a straight path, or even a curved path, a spiral path, etc.

[0054] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heating mechanism for a furnace body, comprising a heat storage body (31), a reversing valve (32), a burner (33), a blower (34), and a gas delivery component (35); characterized in that: There are two heat storage bodies (31) for installation corresponding to the two superheating holes (12) on the furnace body. The heat storage body (31) includes a heat collector (311) and a top cavity (312) formed at the upper end of the heat collector (311) and a bottom cavity (313) formed at the lower end of the heat collector (311). Gas flows through the top cavity (312) and the bottom cavity (313) through the heat collector (311). The bottom cavity (313) is used to connect with the superheating holes (12) on the furnace body. The reversing valve (32) has four valve ports and a valve stop (321) inside. Three of the valve ports are connected to the top chamber (312) of the two heat storage bodies (31) and the blower (34), respectively, and the remaining valve ports are used as exhaust valve ports. There are two burners (33), which are respectively installed in the bottom cavity (313) of the two heat storage bodies (31). The blower (34) is used to blow air, so that the airflow passes through the reversing valve (32) and enters the bottom cavity (313) of the heat storage body (31) from the top cavity (312) of the heat storage body (31), providing combustion air to the burner (33) in the bottom cavity (313); The gas delivery component (35) is connected to the burner (33) to supply gas to the burner (33); The valve (321) is used to switch the air intake of the blower (34) to the two heat storage bodies (31).

2. The heating mechanism according to claim 1, wherein The heating mechanism (3) includes a reversing sensing mechanism, which includes a reversing temperature sensor installed in the exhaust port of the reversing valve (32). The reversing temperature sensor is used to detect the temperature of the exhaust gas. When the exhaust gas temperature reaches a preset value, the valve (321) switches.

3. The heating mechanism according to claim 1, wherein The gas delivery component (35) includes a gas pipe (351) and a gas control valve (352). The gas pipe (351) is a three-way pipe, including a main pipe and two branch pipes connected to one end of the main pipe. The main pipe is connected to a gas source, and the two branch pipes are connected to two burners (33) respectively. There are two gas control valves (352), which are installed on the two branch pipes to control the opening and closing of the branch pipes.

4. The heating mechanism according to claim 1, wherein The burner (33) includes a burner body (331) and an ignition nozzle installed at one end of the burner body (331). The burner body (331) is connected to a gas delivery component (35), and the ignition nozzle faces the corresponding superheating hole (12).

5. A furnace, comprising a furnace body and a crucible, the furnace body having a furnace chamber with an opening at the top, the crucible sealing the opening end of the furnace chamber and the crucible extending into the furnace chamber, the furnace wall of the furnace body having two superheating holes (12) communicating with the furnace chamber, one of the two superheating holes (12) serving as an air inlet and the other as an exhaust outlet, characterized in that: It also includes the heating mechanism (3) according to any one of claims 1-4, wherein the two heat storage bodies (31) of the heating mechanism (3) are fixedly installed on the outer periphery of the furnace body (1) respectively corresponding to the two superheating holes (12), and the bottom cavity (313) of the heat storage body (31) has a through hole on the cavity wall that connects with the superheating hole (12) to connect the bottom cavity (313) with the furnace chamber (11).

6. The furnace of claim 5, wherein The furnace body (1) is provided with a leakage monitoring structure, which includes a drain pipe (114) installed on the side wall of the furnace body (1) and a monitoring sensor installed in the drain pipe (114). One end of the drain pipe (114) passes through the side wall of the furnace chamber (11) and extends to the bottom surface of the furnace chamber (11), while the other end extends out of the furnace body (1).

7. The furnace of claim 6, wherein The leakage monitoring structure also includes a cover (115) installed at the outer port of the drain pipe (114), the cover (115) being hinged at the port of the drain pipe (114).

8. The furnace of claim 5, wherein, It also includes a control system for controlling the operation of the heating mechanism (3) so that the two burners (33) are activated alternately.

9. The furnace of claim 6, wherein, This includes iron melting furnaces, aluminum melting furnaces, and zinc melting furnaces.

10. The furnace according to claim 6, characterized in that, A partition wall (112) is formed on the bottom surface of the furnace chamber (11) to cooperate with the crucible (2) to form a heat conduction path around the outer periphery of the crucible (2), so that the hot gas sent in from one superheating hole (12) is discharged from another superheating hole (12) after passing through the heat conduction path.

Images