CN112556405B - Sintering furnace dewaxing structure and sintering furnace - Google Patents

Abstract

The embodiment of the invention provides a sintering furnace dewaxing structure and a sintering furnace, wherein the sintering furnace dewaxing structure comprises: the sintering furnace dewaxing structure comprises a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel; the connecting channel is arranged in the primary dewaxing device and is used for communicating the primary dewaxing device with the secondary dewaxing device; the primary dewaxing device is provided with an air inlet and a wax outlet, and the inlet and the air inlet of the connecting channel are respectively positioned at two ends of the primary dewaxing device; the heat flow jacket and the cold flow jacket are separately arranged at the peripheries of two ends of the primary dewaxing device to surround the primary dewaxing device, the heat flow jacket and the wax outlet are arranged at the same end of the primary dewaxing device, and the cold flow jacket is arranged at the other end of the primary dewaxing device. Can flexibly and effectively control the state of the forming agent and improve the overall performance of the sintering furnace.

Description

A sintering furnace dewaxing structure and sintering furnace

technical field

The invention relates to the technical field of metallurgical equipment, in particular to a dewaxing structure of a sintering furnace and a sintering furnace.

Background technique

Sintering furnace is a heat treatment furnace that can provide specific temperature, specific environmental pressure and vacuum degree to materials. Sintering furnace generally includes: vacuum device, heating and heat preservation device, process gas device, cooling device (circulating water cooling and pressure fast cooling, etc.) , a control device and a dewaxing device, wherein the function of the dewaxing device is to collect the molding agent added to the product. In order to make the product better, it is usually necessary to add a molding agent to the product, but if the molding agent stays in the product, it will affect the quality of the product. The molding agent will be in a vaporized state at high temperature. The vaporized molding agent is extracted by the vacuum pump group for directional movement, and the molding agent is liquefied by the dewaxing device, so as to complete the collection and storage of the molding agent. The existing dewaxing device is shown in Figure 1. When the sintering furnace is dewaxing, the vacuum pump group extracts the gas in the dewaxing device from the suction port 121, so that the gas forming agent enters the dewaxing device. A cold fluid is introduced into the jacket 14, the gaseous forming agent enters the primary dewaxing device 11 through the air inlet 111, the gaseous forming agent is liquefied and stored in the primary dewaxing device 11, and the remaining unliquefied gaseous forming agent passes through the connecting channel 13. Afterwards, it is liquefied again by the secondary dewaxing device 12 and flows into the primary dewaxing device 11 . When the dewaxing device discharges wax, a hot fluid is introduced into the jacket 14 of the primary dewaxing device 11 , so that the molding agent cannot be solidified, and is kept in a liquid state and discharged from the wax outlet 112 . However, in the dewaxing work of the sintering furnace in the existing dewaxing device, the liquid forming agent in the dewaxing device will flow to the lowest part of the first-stage dewaxing device, and the fluid introduced into the jacket of the first-stage dewaxing device is single. , the state control ability of the molding agent state is poor. When the fluid is supercooled: the liquid forming agent accumulated in the first-stage dewaxing device will be solidified, resulting in the unsmooth extraction of the gaseous forming agent in the sintering furnace and residues, which seriously affects the product quality. When the fluid is overheated: the liquefaction efficiency of the gaseous forming agent entering the first-stage dewaxing device is not high, and the gaseous forming agent is pumped into the vacuum pump group, which affects the service life of the vacuum pump group.

SUMMARY OF THE INVENTION

The embodiment of the present invention provides a dewaxing structure for a sintering furnace and a pressure furnace, which can flexibly and effectively control the state of the molding agent in the dewaxing device, can ensure product quality problems, reduce pump maintenance costs, and reduce wax discharge time. In turn, the overall performance of the sintering furnace is improved.

In a first aspect, an embodiment of the present invention provides a sintering furnace dewaxing structure, wherein the sintering furnace dewaxing structure includes a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel;

The connection channel is arranged inside the primary dewaxing device, and the primary dewaxing device is communicated with the secondary dewaxing device through the connection channel;

The first-stage dewaxing device is provided with an air inlet and a wax outlet, and the inlet of the connecting channel and the air inlet are respectively located at both ends of the first-stage dewaxing device;

The hot flow jacket and the cold flow jacket are separated and arranged on the outer periphery of both ends of the first-stage dewaxing device to surround the first-stage dewaxing device, and the heat flow jacket and the wax outlet are arranged at the outer periphery of the first-stage dewaxing device. At the same end of the first-stage dewaxing device, the cold flow jacket is arranged at the other end of the first-stage dewaxing device.

Preferably, the connecting channel is filled with a first blocking filler.

Preferably, the secondary dewaxing device is filled with a second blocking filler.

Preferably, the connecting channel includes a first channel and a second channel, the first channel includes a first inlet end and a first outlet end, and the second channel includes a second inlet end and a second outlet end, The first air inlet end is arranged inside the first-stage dewaxing device as the inlet of the connecting passage, the first air outlet end is communicated with the second air inlet end, and the second air outlet end is connected with the The secondary dewaxing unit is connected.

Preferably, the first channel is filled with a first flow blocking filler, and the second channel is provided with a flow blocking baffle.

Preferably, the heat flow jacket is a semi-enclosed structure, and the heat flow jacket of the semi-enclosed structure is arranged around the outer periphery of the lower half of the first-stage dewaxing device.

Preferably, the cold flow jacket includes a main structure and an extension structure, the main structure is a fully enclosed structure, and the main structure of the fully enclosed structure includes an outer periphery where the first-stage dewaxing device is disposed, and the extension structure is A semi-enclosed structure, the extended structure of the semi-enclosed structure is surrounded and arranged on the outer periphery of the upper half of the first-stage dewaxing device, and the extended structure of the semi-enclosed structure corresponds to the heat flow jacket of the semi-enclosed structure.

Preferably, the first-stage dewaxing device includes a high support foot and a low support foot, and the first-stage dewaxing device is placed obliquely through the high support foot and the low support foot.

Preferably, the first-stage dewaxing device is fixedly and inclinedly placed by the high support feet and the low support feet, so that the heights of both ends of the first-stage dewaxing device are different, and the wax outlet is arranged at lower end.

In a second aspect, an embodiment of the present invention further provides a pressure furnace, including the dewaxing structure of the sintering furnace according to any one of the embodiments of the present invention.

The beneficial effects of the embodiments of the present invention: the dewaxing structure of the sintering furnace includes a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel; the connecting channel is arranged in the first stage Inside the dewaxing device, the first-stage dewaxing device and the second-stage dewaxing device are communicated through the connecting channel; the first-stage dewaxing device is provided with an air inlet and a wax outlet, and the connection The inlet of the channel and the air inlet are respectively located at both ends of the first-stage dewaxing device; the hot-flow jacket and the cold-flow jacket are separated and arranged at the outer periphery of both ends of the first-stage dewaxing device. The first-stage dewaxing device is surrounded, the hot flow jacket and the wax outlet are arranged at the same end of the first-stage dewaxing device, and the cold flow jacket is arranged at the other side of the first-stage dewaxing device. one end. Through the hot flow jacket and cold flow jacket arranged on the outer periphery of the primary dewaxing device, the state of the forming agent in the primary dewaxing device can be flexibly and effectively controlled, which can ensure product quality problems and reduce the maintenance cost of the vacuum pump set and reduce Wax removal time, thereby improving the overall performance of the sintering furnace.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the structural representation of a kind of existing sintering furnace dewaxing structure;

2 is a schematic structural diagram of a sintering furnace dewaxing structure provided by an embodiment of the present invention;

3 is a schematic structural diagram of a connection channel provided by an embodiment of the present invention;

4 is a schematic structural diagram of a secondary dewaxing device provided by an embodiment of the present invention;

5 is a schematic structural diagram of another connection channel provided by an embodiment of the present invention;

6 is a schematic structural diagram of another connection channel provided by an embodiment of the present invention;

7 is a schematic structural diagram of yet another sintering furnace dewaxing structure provided by an embodiment of the present invention;

8 is a schematic structural diagram of another sintering furnace dewaxing structure provided by an embodiment of the present invention;

9 is a schematic structural diagram of a heat flow jacket provided in an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a cold flow jacket provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 2 to FIG. 10 , wherein FIG. 2 is a schematic structural diagram of a sintering furnace dewaxing structure according to an embodiment of the present invention. In FIG. 2 , the sintering furnace dewaxing structure includes a first-stage dewaxing device 21 , The secondary dewaxing device 22 , the hot flow jacket 24 , the cold flow jacket 25 and the connection channel 23 ; the connection channel 23 is arranged inside the primary dewaxing device 21 , and the primary The dewaxing device 21 communicates with the secondary dewaxing device 22; the primary dewaxing device 21 is provided with an air inlet 211 and a wax outlet 212, and the inlet of the connecting passage 23 is connected to the air inlet 211 are respectively located at the two ends of the first-stage dewaxing device 21; the hot-flow jacket 24 and the cold-flow jacket 25 are separately arranged on the outer periphery of both ends of the first-stage dewaxing device 21 for the first-stage dewaxing device 21. The wax device 21 is surrounded, the hot flow jacket 24 and the wax outlet 212 are arranged at the same end of the first stage dewaxing device 21 , and the cold flow jacket 25 is arranged at the first stage dewaxing device 21 the other end of the . Further, the hot flow jacket 24 and the cold flow jacket 25 are sandwiched between the outer circumferences of both ends of the first-stage dewaxing device 21 .

Wherein, the first-stage dewaxing device 21 is placed nearly horizontally, and the second-stage dewaxing device 22 is placed nearly vertically, so that the gas forming agent moves in a near-horizontal direction in the first-stage dewaxing device 21, and the gas forming agent It moves in a nearly vertical direction in the secondary dewaxing device 22. After the gas molding agent is cooled into a liquid molding agent, it can flow down the cavity wall of the secondary dewaxing device 22 and flow to the first stage through the connecting channel 23. in the dewaxing unit 21.

Further, the outer periphery of the secondary dewaxing device 22 is also provided with a cold flow jacket 25 for introducing a cold flow to liquefy the gas forming agent in the secondary dewaxing device 22 into a liquid forming agent.

Further, the first-stage dewaxing device 21 is a cylindrical structure, the interior of the first-stage dewaxing structure is a dewaxing cavity, and the hot flow jacket 24 and the cold flow jacket 25 surround the the outer periphery of the first-stage dewaxing device 21. One end of the first-stage dewaxing device 21 is heated when passing through the heat flow jacket 24, so that the liquid forming agent is kept in a liquefied state in the first-stage dewaxing device 21. In the cold flow jacket 25, The temperature of the first-stage dewaxing device 21 is lowered during cold flow, so that the gaseous molding agent is liquefied into a liquid molding agent.

Further, similarly, the secondary dewaxing device 22 is also a cylindrical structure, the interior of the secondary dewaxing device 22 is a dewaxing cavity, and the inlet and the connecting channel of the secondary dewaxing device 22 The outlet of 23 is connected, the suction port of the secondary dewaxing device 22 is connected to the vacuum pump group, and the gas forming agent is pumped into the dewaxing device through the vacuum pump group, so that the gas forming agent flows through the first-stage dewaxing device. 21. The connecting channel 23 and the secondary dewaxing device 22 are cooled and liquefied into a liquid molding agent, and the liquid molding agent is discharged from the dewaxing device through the wax outlet 212 of the primary dewaxing device 21 .

Further, the dewaxing device includes a high support leg 210 and a low support leg 29 , and the dewaxing device is placed obliquely by the high support leg 210 and the low support leg 29 . The first-stage dewaxing device 21 is fixed and tilted by the high support feet 210 and the low support feet 29, so that the heights of both ends of the first-stage dewaxing device 21 are different, and the wax outlet 212 Set at the bottom of the lower end. By arranging the wax outlet 212 at the bottom of the lower end, the liquid forming agent can be stored in the first-stage dewaxing device 21 , and when the wax needs to be removed, the wax outlet 212 can be used to quickly discharge the wax. wax.

Further, the high support feet 210 are arranged at the bottom of the cold flow jacket 25 , and the low support feet 29 are arranged at the bottom of the heat flow jacket 24 , so that the heat flow jacket 24 in the primary dewaxing device 21 is formed. The end where it is located is the lower end, and the liquid forming agent can be stored in the lower end of the primary dewaxing device 21 and maintained in liquid state by the heat flow in the heat flow jacket 24 .

Further, the air inlet 211 is arranged at the higher end of the primary dewaxing device 21, the wax outlet 212 is arranged at the lower end of the primary dewaxing device 21, and the wax outlet 212 is located at the lower end of the primary dewaxing device 21. At the bottom of the lower end of the primary dewaxing device 21 , the air inlet 211 is located in the middle of the upper end of the primary dewaxing device 21 .

In the embodiment of the present invention, the dewaxing structure of the sintering furnace includes a primary dewaxing device 21, a secondary dewaxing device 22, a heat flow jacket 24, a cold flow jacket 25 and a connecting channel 23; the connecting channel 23 is provided with Inside the primary dewaxing device 21 , the primary dewaxing device 21 is communicated with the secondary dewaxing device 22 through the connecting channel 23 ; the primary dewaxing device 21 is provided with an inlet The air port 211 and the wax outlet 212, the inlet of the connecting channel 23 and the air inlet 211 are respectively located at both ends of the first-stage dewaxing device 21; the hot flow jacket 24 and the cold flow jacket 25 are arranged at the outer periphery of both ends of the first-stage dewaxing device 21 to surround the first-stage dewaxing device 21, and the heat flow jacket 24 and the wax outlet 212 are arranged in the first-stage dewaxing device. At the same end of 21 , the cold flow jacket 25 is arranged at the other end of the first-stage dewaxing device 21 . Through the hot flow jacket 24 and the cold flow jacket 25 arranged on the outer periphery of the first-stage dewaxing device 21, the state of the forming agent in the first-stage dewaxing device 21 can be flexibly and effectively controlled, which can ensure product quality problems and reduce pump sets. Maintenance costs, reduce wax removal time, and improve the overall performance of the sintering furnace.

Preferably, FIG. 3 is a schematic structural diagram of a connection channel provided by an embodiment of the present invention. In FIG. 3 , the connection channel 23 is filled with a first flow blocking filler 26 . The first flow blocking filler 26 may be a Pall ring, specifically one or a mixture of a metal Pall ring, a ceramic Pall ring, and a plastic Pall ring. Through the first blocking filler 26, the time of the gas forming agent in the dewaxing device is prolonged, so that the gas forming agent is fully liquefied, the amount of the gas forming agent pumped by the vacuum pump unit is reduced, the service life of the vacuum pump unit is increased, and the pump unit is reduced. Group maintenance costs.

Preferably, FIG. 4 is a schematic structural diagram of a secondary dewaxing device according to an embodiment of the present invention. In FIG. 4 , the secondary dewaxing device 22 is filled with a second flow blocking filler 27 . The second flow blocking filler 27 can be a Pall ring, and specifically can be one or a mixture of a metal Pall ring, a ceramic Pall ring, and a plastic Pall ring. Through the first blocking filler 26, the time of the gas forming agent in the dewaxing device is prolonged, so that the gas forming agent is fully liquefied, the amount of the gas forming agent pumped by the vacuum pump unit is reduced, the service life of the vacuum pump unit is increased, and the pump unit is reduced. Group maintenance costs.

Preferably, FIG. 5 is a schematic structural diagram of another connection channel provided by an embodiment of the present invention. In FIG. 5, the connection channel 23 includes a first channel 231 and a second channel 232, and the first channel 231 includes a first inlet channel 231. The air end 2311 and the first air outlet end 2312, the second passage 232 includes a second air inlet end 2321 and a second air outlet end 2322, the first air inlet end 2311 is provided as the inlet of the connecting passage 23 in the Inside the primary dewaxing device 21 , the first gas outlet end 2312 communicates with the second gas inlet end 2321 , and the second gas outlet end 2322 communicates with the secondary dewaxing device 22 .

Further, the axis of the first channel 231 is parallel to the axis of the primary dewaxing device 21 , and the axis of the second channel 232 is parallel to the axis of the secondary dewaxing device 22 . The first channel 231 and the second channel 232 are both cylindrical structures, and the first channel 231 is a cylindrical structure, which facilitates the collection of the liquid molding agent while increasing the inner wall area to make the gas molding agent liquefy faster. , the second channel 232 is a cylindrical structure to increase the inner wall area to make the gas forming agent liquefy faster in the second channel 232 .

Preferably, FIG. 6 is a schematic structural diagram of another connection channel provided by an embodiment of the present invention. In FIG. 6 , the first channel 231 is filled with a first blocking filler 26 , and the second channel 232 is provided with There are baffles 28 . The first flow blocking filler 26 may be a Pall ring, specifically one or a mixture of a metal Pall ring, a ceramic Pall ring, and a plastic Pall ring. Through the first blocking filler 26 in the first channel 231 and the blocking baffle 28 set in the second channel 232, the time of the gas forming agent in the dewaxing device is further extended, and the gas forming agent is fully liquefied, Reduce the amount of gas forming agent pumped by the vacuum pump set, thereby improving the service life of the vacuum pump set and reducing the maintenance cost of the pump set.

Further, the baffles 28 are staggered to increase the flow length of the gas forming agent and further prolong the time of the gas forming agent in the dewaxing device.

Further, FIG. 7 is a schematic structural diagram of another sintering furnace dewaxing structure according to an embodiment of the present invention. In FIG. 7 , the first channel 231 is filled with the first blocking filler 26 , and the second channel 232 is provided with a blocking baffle 28, and the secondary dewaxing device 22 is filled with a second blocking filler 27.

Preferably, FIG. 8 is a schematic structural diagram of another sintering furnace dewaxing structure provided by an embodiment of the present invention. In FIG. 8 , the air inlet 211 and the wax outlet 212 are arranged in the first-stage dewaxing device 21 The lower end of the first stage dewaxing device 21, the wax outlet 212 is located at the bottom of the lower end of the first stage dewaxing device 21, and the air inlet 211 is located at the middle of the lower end of the first stage dewaxing device 21, that is, the The air inlet 211 is located above the wax outlet 212 . The heat flow jacket 24 is arranged on the outer periphery of the lower end of the primary dewaxing device 21 to prevent the liquid forming agent collected at the lower end of the primary dewaxing device 21 from solidifying. Moreover, the air inlet 211 and the wax outlet 212 are arranged at the lower end of the first-stage dewaxing device 21, so that when the gas forming agent enters from the air inlet 211, the temperature carried by itself will be transferred to the liquid state forming agent, thereby reducing the heat flow temperature in the heat flow jacket 24.

Preferably, FIG. 9 is a schematic structural diagram of a heat flow jacket provided in an embodiment of the present invention. In FIG. 9 , the heat flow jacket 24 is a semi-enclosed structure, and the heat flow jacket 24 of the semi-enclosed structure is surrounded and arranged in the The outer circumference of the lower half of the first-stage dewaxing device 21 .

Further, in the first-stage dewaxing device 21, the end where the hot flow jacket 24 is located is the lower end, and the end where the cold flow jacket 25 is located is the higher end. When rising in the first stage dewaxing device 21, it is cooled into a liquid molding agent, and the liquid molding agent flows to the lower end of the first stage dewaxing device 21, and passes through the heat flow clamp at the bottom of the lower end of the first stage dewaxing device 21. Sleeve 24 for thermal storage.

Further, the inlet of the connection channel 23 and the air inlet 211 are located at two ends of the first-stage dewaxing device 21 respectively, so that the flow length of the gas forming agent in the first-stage dewaxing device 21 can be increased. , and further increase the flow time of the gas forming agent in the first-stage dewaxing device 21, so that the gas forming agent is sufficiently cooled.

Further, the air inlet 211 is arranged at the higher end of the primary dewaxing device 21 , and the inlet of the connecting channel 23 is arranged at the lower end of the primary dewaxing device 21 . The hot flow jacket 24 is arranged at the bottom of the outer circumference of the lower end of the primary dewaxing device 21 , and the cold flow jacket 25 is arranged at the outer circumference of the higher end of the primary dewaxing device 21 . The heat flow in the heat flow jacket 24 only maintains the heat preservation of the liquid forming agent collected at the lower end in the first-stage dewaxing device 21 to maintain the liquefied state of the liquid forming agent.

Further, the air inlet 211 is arranged at the lower end of the first-stage dewaxing device 21, the wax outlet 212 is arranged at the lower end of the first-stage dewaxing device 21, and the wax outlet 212 is located at the lower end of the first-stage dewaxing device 21. Below the air inlet 211 , the wax outlet 212 is located at the bottom of the lower end of the first-stage dewaxing device 21 , and the inlet of the connecting channel 23 is set higher in the first-stage dewaxing device 21 . At one end, the hot flow jacket 24 is arranged at the bottom of the outer circumference of the lower end of the primary dewaxing device 21 , and the cold flow jacket 25 is arranged at the outer circumference of the higher end of the primary dewaxing device 21 . The heat flow in the heat flow jacket 24 only maintains the heat preservation of the liquid forming agent collected at the lower end in the first-stage dewaxing device 21 to maintain the liquefied state of the liquid forming agent.

Preferably, FIG. 10 is a schematic structural diagram of a cold flow jacket provided in an embodiment of the present invention. In FIG. 10 , the heat flow jacket 24 is a semi-enclosed structure, and the heat flow jacket 24 of the semi-enclosed structure is surrounded and arranged On the outer periphery of the lower half of the first-stage dewaxing device 21 . The cold flow jacket 25 includes a main body structure 251 and an extension structure 252. The main body structure 251 is a fully enclosed structure. The extension structure 252 is a semi-enclosed structure, and the extension structure 252 of the semi-enclosed structure surrounds the outer periphery of the upper half of the first-stage dewaxing device 21 . The heat flux jacket 24 corresponds. In this way, the cooling area of the cold flow jacket 25 and the primary dewaxing device 21 is increased.

An embodiment of the present invention further provides a pressure furnace, including the dewaxing structure of the sintering furnace according to any one of the embodiments of the present invention.

Using the pressure furnace also provided in the present embodiment, since the dewaxing structure of the sintering furnace includes a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel; the connecting channel is provided at the Inside the first-stage dewaxing device, the first-stage dewaxing device is communicated with the second-stage dewaxing device through the connecting channel; the first-stage dewaxing device is provided with an air inlet and a wax outlet, The inlet of the connection channel and the air inlet are respectively located at both ends of the first-stage dewaxing device; the hot flow jacket and the cold flow jacket are separated and arranged at both ends of the first-stage dewaxing device The outer periphery surrounds the first-stage dewaxing device, the hot flow jacket and the wax outlet are arranged at the same end of the first-stage dewaxing device, and the cold flow jacket is arranged at the first-stage dewaxing device. the other end of the device. Through the hot flow jacket and cold flow jacket arranged on the outer periphery of the primary dewaxing device, the state of the forming agent in the primary dewaxing device can be flexibly and effectively controlled, which can ensure product quality problems and reduce the maintenance cost of the vacuum pump set and reduce Wax removal time, thereby improving the overall performance of the sintering furnace.

The above disclosures are only preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited by this. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims (10)

1. The dewaxing structure of the sintering furnace is characterized by comprising a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel;

the connecting channel is arranged in the primary dewaxing device and is used for communicating the primary dewaxing device with the secondary dewaxing device;

the primary dewaxing device is provided with an air inlet and a wax outlet, and the inlet and the air inlet of the connecting channel are respectively positioned at two ends of the primary dewaxing device;

the heat flow jacket and the cold flow jacket are separately arranged at the peripheries of two ends of the primary dewaxing device to surround the primary dewaxing device, the heat flow jacket and the wax outlet are arranged at the same end of the primary dewaxing device, and the cold flow jacket is arranged at the other end of the primary dewaxing device.

2. A sintering furnace dewaxing structure according to claim 1, wherein the connecting passage is filled with a first flow-impeding filler.

3. A sintering furnace dewaxing structure according to claim 1 or claim 2, wherein the secondary dewaxing unit is filled with a second flow-impeding filler.

4. The sintering furnace dewaxing structure of claim 3, wherein the connecting channel comprises a first channel and a second channel, the first channel comprises a first gas inlet end and a first gas outlet end, the second channel comprises a second gas inlet end and a second gas outlet end, the first gas inlet end is arranged in the primary dewaxing device as an inlet of the connecting channel, the first gas outlet end is communicated with the second gas inlet end, and the second gas outlet end is communicated with the secondary dewaxing device.

5. The sintering furnace dewaxing structure of claim 4, wherein the first passage is filled with a first flow-resisting filler, and the second passage is provided with a flow-resisting partition.

6. The fritting furnace dewaxing structure of claim 1, wherein the heat flow jacket is a semi-surrounding structure, and the heat flow jacket of the semi-surrounding structure surrounds and is disposed on the periphery of the lower half of the primary dewaxing device.

7. The sintering furnace dewaxing structure of claim 6, wherein the cold flow jacket comprises a main body structure and an extension structure, the main body structure is a full surrounding structure, the main body structure of the full surrounding structure comprises an outer periphery of the primary dewaxing device, the extension structure is a semi-surrounding structure, the extension structure of the semi-surrounding structure surrounds the outer periphery of the upper half of the primary dewaxing device, and the extension structure of the semi-surrounding structure corresponds to the hot flow jacket of the semi-surrounding structure.

8. The sintering furnace dewaxing structure of claim 1, wherein the dewaxing device further comprises a high support leg and a low support leg, and the dewaxing device is obliquely arranged through the high support leg and the low support leg.

9. The sintering furnace dewaxing structure of claim 8, wherein the primary dewaxing device is obliquely arranged by fixing the high supporting legs and the low supporting legs so that the heights of two ends of the primary dewaxing device are different, and the wax outlet is arranged at the lower end.

10. A sintering furnace comprising the dewaxing structure of any of claims 1 to 9.

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