Muffle furnace structure for rapidly detecting air reactivity of prebaked anode

Abstract

The utility model relates to the field, in particular to a muffle furnace structure for rapidly detecting the air reactivity of a prebaked anode, which comprises a heat conduction furnace body, a heated furnace chamber is arranged in the heat conduction furnace body, a lateral electric heating tube is wound in a spiral of an annular heating inner chamber, and a top cover unit is hermetically mounted at the top of the heated furnace chamber. The bottom of the center of the top cover unit is installed on the inner wall of the heated furnace cavity in a plugging mode, a sample supporting unit is installed in the heated furnace cavity below the top cover unit, and synchronous position control mechanisms are installed at the tops of the bottom supporting seats on the left side and the right side of the heat conduction furnace body correspondingly. When a cylindrical prebaked anode sample is taken and placed, the lifting position control of the sample supporting unit is realized by utilizing the lifting of the synchronous position control mechanism, and the lifting of the sample placing net plate and the lifting of the cylindrical prebaked anode sample placed on the sample placing net plate can be driven, so that the cylindrical prebaked anode sample is separated to the outside of the heat conduction furnace body, and the sampling scald is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of muffle furnaces, in particular to a muffle furnace structure for quickly detecting air reactivity of a prebaked anode. Background Art

[0002] Prebaked anode is an indispensable material in aluminum electrolysis production. Its quality directly affects the production efficiency and energy consumption of electrolytic aluminum. In order to ensure the quality of prebaked anode, it is usually necessary to conduct a series of tests, including the determination of air reactivity.

[0003] At present, the muffle furnace is a commonly used heating measurement equipment for air reactivity measurement. When using the muffle furnace to measure the air reactivity of the prebaked anode, it is necessary to place the cylindrical prebaked anode sample in the muffle furnace, introduce the corresponding gas, and judge the test result by observing the mass change of the cylindrical prebaked anode sample after a certain period of time.

[0004] The muffle furnace structure in the prior art is also constantly being improved and innovated. For example, a muffle furnace is disclosed in the patent document with patent publication number CN213147365U. It can be seen from the patent document that its main structure includes the furnace body, heating chamber, furnace door, heating plate and other main structures, wherein the heating plate is slidably withdrawn to improve the safety when the door is opened for sampling, but this structure still requires the operator to extend his hand into the heating chamber, and there is also a safety hazard of touching the high-temperature side wall; in addition, when this structure is used for the pre-baked anode air reactivity test of the cylindrical pre-baked anode sample, the sample is placed at the bottom of the heating chamber and its actual heating temperature will have deviations, and the sample needs to be manually taken out after the reaction is completed for mass measurement, and the operation steps are cumbersome and there are the above-mentioned sampling safety hazards.

[0005] To this end, the utility model optimizes the process of completing the air reactivity test of the prebaked anode in the existing muffle furnace, and specially designs a muffle furnace structure for quickly detecting the air reactivity of the prebaked anode, so as to better solve the problems existing in the prior art. Utility Model Content

[0006] The utility model is to solve one of the above technical problems, and the technical solution adopted is: a muffle furnace structure for quickly detecting the air reactivity of a prebaked anode, comprising a heat-conducting furnace body, the bottom of which is fixedly installed on the top of a bottom support seat, a heated furnace cavity is arranged inside the heat-conducting furnace body, the top of the heated furnace cavity is arranged open, an annular heating inner cavity is circumferentially arranged on the outer side wall of the heat-conducting furnace body outside the heated furnace cavity, a lateral electric heating tube is spirally wound inside the annular heating inner cavity, the lateral electric heating tube is connected to an external heating power source, and the lateral electric heating tube is connected to an external heating power source. A top cover unit is installed in the top seal, and the central bottom of the top cover unit is plugged into the inner wall of the heated furnace cavity. The outer bottom of the top cover unit is detachably fixed and sleeved on the upper outer wall of the heat-conducting furnace body. A sample supporting unit is installed inside the heated furnace cavity below the top cover unit, and the upper left and right sides of the sample supporting unit extend to the outside of the heat-conducting furnace body. Synchronous positioning mechanisms are respectively installed on the top of the bottom support seats on the left and right sides of the heat-conducting furnace body, and the tops of the two synchronous positioning mechanisms are installed on the sample supporting units on the corresponding sides.

[0007] In any of the above schemes, it is preferred that the two synchronous position control mechanisms are in a synchronous lifting state when in working state.

[0008] In any of the above schemes, it is preferred that the sample supporting unit includes a horizontal supporting portion, the outer side of the horizontal supporting portion is bent vertically upward to form an inverted U-shaped clamping portion, the outer vertical section of the inverted U-shaped clamping portion extends downward and is bent horizontally at the end to form a horizontal connecting portion, the front and rear ends of the horizontal connecting portion are connected to the top of the corresponding synchronous positioning mechanism below, and the top of the horizontal supporting portion is used to support the sample layout plate placed above it.

[0009] In any of the above schemes, preferably, both sides of the lofting grid plate abut against the side walls of the vertical section on the inner side of the inverted U-shaped clamping portion at corresponding positions, and the top of the lofting grid plate is used to place the cylindrical prebaked anode sample to be tested.

[0010] In any of the above schemes, it is preferred that when the cylindrical prebaked anode sample is in a heating reaction state, the top of the U-shaped groove of the inverted U-shaped clamping parts on both sides abuts against the top of the heat-conducting furnace body and the top of the inverted U-shaped clamping parts on both sides are pressed and positioned by the top cover unit.

[0011] In any of the above schemes, it is preferred that the synchronous positioning mechanism includes two synchronous lifting electric cylinders respectively vertically arranged below the horizontal connecting part of the sample supporting unit on the same side, the bottoms of the two lifting electric cylinders are respectively fixed to the tops of the corresponding weighing sensors below, the bottoms of each weighing sensor are fixedly mounted on the top of the bottom support seat, and the top of the piston rod of each synchronous lifting electric cylinder is provided with an external thread section, the upper part of the external thread section passes through the mounting hole on the horizontal connecting part and clamps the horizontal connecting part through a locking nut threaded on its outer side wall.

[0012] In any of the above schemes, preferably, each weighing sensor is connected to a display installed on the front side wall of the heat-conducting furnace body through a signal line and a wire.

[0013] In any of the above schemes, it is preferred that the top cover unit includes a high-temperature resistant top cover, the middle plug body portion of the high-temperature resistant top cover is matched with the plug installed on the upper inner wall of the heating furnace cavity, and the outer ring portion of the high-temperature resistant top cover is sleeved on the upper outer wall of the heat-conducting furnace body and fixed to the upper outer wall of the heat-conducting furnace body by a plurality of quick-release bolts.

[0014] In any of the above schemes, preferably, a bottom heating cavity is provided at the bottom of the heat-conducting furnace body, a plurality of bottom electric heating tubes are laid inside the bottom heating cavity, and each of the bottom electric heating tubes is connected to an external power source;

[0015] A high-temperature resistant anti-stick coating is sprayed on the inner wall of the heating furnace cavity; and a high-temperature resistant heat-insulating layer is arranged on the outer side wall of the heat-conducting furnace body.

[0016] In any of the above schemes, preferably, when the cylindrical prebaked anode sample is taken out and placed, the bottom of the sample placement screen is higher than the top of the heat-conducting furnace body.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The muffle furnace structure designed in the utility model adopts the upper cover opening method, which can realize the automatic lifting and lowering of sampling and setting out, effectively ensuring the safety when sampling the cylindrical pre-baked anode sample and avoiding the scalding problem caused by misoperation.

[0019] 2. The muffle furnace structure for rapid detection of air reactivity of prebaked anodes can control the heating of the lateral electric heating tubes and the bottom electric heating tubes as needed when conducting the heating reaction of cylindrical prebaked anode samples, effectively realizing effective temperature control and heating of the internal heated furnace cavity, and improving the efficiency and effect of the heating reaction.

[0020] 3. When taking and placing the cylindrical prebaked anode sample, the lifting and lowering of the sample support unit can be realized by utilizing the lifting and lowering of the synchronous position control mechanism on both sides, thereby driving the lifting and lowering of the sample grid plate and the cylindrical prebaked anode sample placed thereon, so that the cylindrical prebaked anode sample is separated from the outside of the heat-conducting furnace body to avoid burns during sampling.

[0021] 4. The load-bearing sensors installed at the bottom of the four synchronous lifting cylinders can always detect the weight changes of the cylindrical prebaked anode samples after the heating reaction and before and after sampling, so as to obtain the reactivity of the cylindrical prebaked anode samples after calculation and analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the specific implementation of the utility model, the following will briefly introduce the drawings required for the specific implementation. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the utility model in the heating state.

[0025] Figure 3 It is a schematic cross-sectional structure diagram of the lofting screen of the utility model when it is in an upward lifting state.

[0026] Figure 4 It is a schematic cross-sectional structural diagram of the utility model when it is in a sampling state.

[0027] In the figure, 1. heat-conducting furnace body; 2. bottom support seat; 3. heated furnace cavity; 4. annular heating inner cavity; 5. lateral electric heating tube; 6. sample supporting unit; 601. horizontal supporting part; 602. inverted U-shaped clamping part; 603. horizontal connecting part; 604. lofting mesh plate; 605. U-shaped groove; 7. cylindrical pre-baked anode sample; 8. synchronous lifting electric cylinder; 9. weighing sensor; 10. external thread section; 11. locking nut; 12. display; 13. high temperature resistant top cover; 1301. middle plug body; 1302. outer ring; 14. quick release bolt; 15. bottom heating inner cavity; 16. bottom electric heating tube; 17. high temperature resistant anti-stick coating; 18. high temperature resistant insulation layer; 19. pressure gauge; 20. thermometer; 21. safety control valve; 22. gas guide joint. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. Figure 1-Figure 4 as shown in .

[0029] Embodiment: A muffle furnace structure for rapid detection of air reactivity of prebaked anodes, comprising a heat-conducting furnace body 1, the bottom of the heat-conducting furnace body 1 is fixedly mounted on the top of a bottom support seat 2, a heating furnace chamber 3 is arranged inside the heat-conducting furnace body 1, the top of the heating furnace chamber 3 is open, an annular heating inner chamber 4 is circumferentially arranged on the outer wall of the heat-conducting furnace body 1 outside the heating furnace chamber 3, a lateral electric heating tube 5 is spirally wound inside the annular heating inner chamber 4, the lateral electric heating tube 5 is connected to an external heating power source, and a top cover is sealed and installed on the top of the heating furnace chamber 3 The central bottom of the top cover unit is plugged into the inner wall of the heating furnace cavity 3, and the outer bottom of the top cover unit is detachably fixedly sleeved on the upper outer wall of the heat-conducting furnace body 1. A sample support unit 6 is installed inside the heating furnace cavity 3 below the top cover unit. The upper parts of the left and right sides of the sample support unit 6 extend out of the heat-conducting furnace body 1. Synchronous positioning mechanisms are respectively installed on the top of the bottom support seat 2 on the left and right sides of the heat-conducting furnace body 1. The tops of the two synchronous positioning mechanisms are installed at the sample support unit 6 on the corresponding side. The entire muffle furnace structure for rapid detection of air reactivity of prebaked anodes adopts a top opening design, which is different from the traditional muffle furnace structure with side or front doors. When placing and sampling, the sample support unit 6 inside the corresponding heating furnace cavity 3 is lifted and lowered to an appropriate height position as required by the lifting of the synchronous positioning mechanisms on both sides. Before placing and sampling, the top cover unit needs to be removed in advance, and the installation and removal of the top cover unit are relatively simple and quick.

[0030] In any of the above schemes, it is preferred that the two synchronous position control mechanisms are in a synchronous lifting state when in working state.

[0031] Synchronous lifting control can ensure the stability when driving the sample to rise and fall, and effectively improve the stable adjustment of the position of the sample during the sampling and setting out process.

[0032] In any of the above schemes, it is preferred that the sample supporting unit 6 includes a horizontal supporting portion 601, the outer side of the horizontal supporting portion 601 is bent vertically upward to form an inverted U-shaped clamping portion 602, the outer vertical section of the inverted U-shaped clamping portion 602 extends downward and is bent horizontally at the end to form a horizontal connecting portion 603, the front and rear ends of the horizontal connecting portion 603 are connected to the top of the corresponding synchronous positioning mechanism below, and the top of the horizontal supporting portion 601 is used to support the sample layout screen 604 placed above it.

[0033] The cooperation of the horizontal supporting parts 601 on the left and right sides can realize the stable support of both sides of the lofting mesh plate 604, ensuring its stability during lifting and lowering.

[0034] In any of the above schemes, it is preferred that both sides of the lofting grid plate 604 are respectively abutted against the side walls of the vertical section on the inner side of the inverted U-shaped clamping portion 602 at the corresponding positions, and the top of the lofting grid plate 604 is used to place the cylindrical prebaked anode sample 7 to be tested.

[0035] In any of the above schemes, it is preferred that when the cylindrical prebaked anode sample 7 is in a heating reaction state, the top of the U-shaped groove 605 of the inverted U-shaped clamping portion 602 on both sides abuts against the top of the heat-conducting furnace body 1 and the top of the inverted U-shaped clamping portion 602 on both sides is pressed and positioned by the top cover unit.

[0036] The inverted U-shaped clamping parts 602 on both sides can effectively play a guiding and limiting role.

[0037] In any of the above schemes, it is preferred that the synchronous positioning mechanism includes two synchronous lifting electric cylinders 8 respectively vertically arranged on the same side below the horizontal connecting part 603 of the sample supporting unit 6, the bottoms of the two synchronous lifting electric cylinders 8 are respectively fixed to the tops of the corresponding weighing sensors 9 below, the bottoms of each weighing sensor 9 are fixedly mounted on the top of the bottom support seat 2, and the top of the piston rod of each synchronous lifting electric cylinder 8 is provided with an external thread section 10, the upper part of the external thread section 10 passes through the mounting hole on the horizontal connecting part 603 and clamps the horizontal connecting part 603 through a locking nut 11 threadedly screwed on its outer wall.

[0038] The synchronous lifting electric cylinder 8 located at the front and rear ends can realize the effective fixed connection of the external threaded section 10 and the locking nut 11 on the top of the horizontal connection part 603 at the current position, so as to facilitate the stable and smooth lifting of the horizontal connection part 603 when controlling the lifting of the synchronous lifting electric cylinder 8; at the same time, the two locking nuts 11 are used to achieve locking positioning, and quick disassembly can be completed as needed.

[0039] In any of the above solutions, preferably, each of the weighing sensors 9 is connected to a display 12 installed on the front side wall of the heat-conducting furnace body 1 through a signal line and a wire.

[0040] The weighing sensor 9 arranged at the bottom of the synchronous lifting electric cylinder 8 can weigh the weight above it. The sum of the overall weights of each weighing sensor 9 can obtain the weight of the entire sample support unit 6 and the sample grid 604 and the cylindrical pre-baked anode sample 7 thereon. Observing the parameters displayed on the existing display 12 can facilitate the calculation of the change in sample weight before and after the heating reaction based on the change in the measurement data of the weighing sensor 9.

[0041] In any of the above schemes, it is preferred that the top cover unit includes a high temperature resistant top cover 13, a middle plug body portion 1301 of the high temperature resistant top cover 13 is plugged and installed on the upper inner wall of the heating furnace chamber 3, and an outer ring portion 1302 of the high temperature resistant top cover 13 is sleeved on the upper outer wall of the heat-conducting furnace body 1 and is bolted and fixed to the upper outer wall of the heat-conducting furnace body 1 by a plurality of quick-release bolts 14.

[0042] The middle plug body 1301 of the high temperature resistant top cover 13 can serve the purpose of sealing and plugging. At the same time, the sleeve connection of the outer ring part 1302 on the periphery and the bolt connection of the quick release bolts 14 can ensure the fixing effect of the installed high temperature resistant top cover 13 and facilitate quick disassembly.

[0043] In any of the above schemes, it is preferred that a bottom heating cavity 15 is provided at the bottom of the heat-conducting furnace body 1, and a plurality of bottom electric heating tubes 16 are laid inside the bottom heating cavity 15, and each of the bottom electric heating tubes 16 is connected to an external power supply; by controlling the opening of the bottom electric heating tube 16, the side electric heating tube 5 can be better coordinated to achieve heating treatment of the entire heated furnace cavity 3, thereby controlling the heating efficiency and effect.

[0044] A high temperature resistant anti-stick coating 17 is sprayed on the inner wall of the heating furnace cavity 3 ; and a high temperature resistant heat insulating layer 18 is provided on the outer side wall of the heat conducting furnace body 1 .

[0045] In any of the above schemes, it is preferred that when the cylindrical prebaked anode sample 7 is placed, the bottom of the layout grid plate 604 is higher than the top of the heat-conducting furnace body 1 .

[0046] The cylindrical prebaked anode sample 7 can be conveniently taken and placed in the upper part of the heated furnace chamber 3 without reaching into the heated furnace chamber 3 to take samples, thus avoiding the occurrence of high temperature burns.

[0047] In any of the above schemes, it is preferred that a pressure gauge 19 and a thermometer 20 are installed on the top of the high temperature resistant top cover 13, and the lower ends of the pressure gauge 19 and the thermometer 20 are extended to the interior of the heated furnace chamber 3. An air guide joint 22 with a safety control valve 21 is also installed on the top of the high temperature resistant top cover 13, and the bottom of the air guide joint 22 extends to the interior of the heated furnace chamber 3.

[0048] The pressure gauge 19 and the thermometer 20 can monitor the pressure and temperature inside the heated furnace chamber 3 respectively. In addition, the internal air pressure can be controlled within a safe pressure range by opening the safety control valve 21 on the gas guide joint 22. When the pressure is too high, the safety control valve 21 automatically opens and closes after the pressure reaches the standard.

[0049] Specific working principle: The muffle furnace structure for quickly detecting the air reactivity of prebaked anodes in the utility model adopts a top-opening design, which is different from the traditional muffle furnace structure with side or front doors.

[0050] When laying out and sampling, the sample support unit 6 in the corresponding heated furnace chamber 3 is lifted and lowered to an appropriate height position by the lifting and lowering of the synchronous position control mechanism on both sides. The top cover unit needs to be removed in advance before laying out and sampling. The installation and removal of the top cover unit are relatively simple and quick. After laying out, the weight displayed by each weighing sensor 9 is recorded through the display 12, and the sum is added as the initial weight.

[0051] In addition, when the layout is completed, the two synchronous position control mechanisms are controlled to descend, driving the sample support unit 6 to descend, and at the same time, the layout grid 604 and each cylindrical pre-baked anode sample 7 thereon are lowered to the appropriate position, and then the top cover unit is covered and locked and fixed on the heat-conducting furnace body 1.

[0052] After the top cover unit is installed, the external power supply is controlled to be turned on and then the corresponding lateral electric heating tube 5 is controlled to heat up. The temperature inside the heated furnace chamber 3 is observed by the thermometer 20. At the same time, a temperature controller is configured on the external power supply to facilitate temperature insulation and heating temperature control during the heating reaction process.

[0053] When the heating is completed, the top cover unit is disassembled according to the reverse operation of the above operation, and then the two synchronous position control mechanisms are controlled to lift up, thereby driving the corresponding sample support unit 6 and the sample grid 604 and cylindrical pre-baked anode sample 7 supported thereon to rise and eventually rise above the top of the heat-conducting furnace body 1, which is convenient for rapid cooling on the outside. At the same time, there is no need to put the hands into the heat-conducting furnace body 1 when taking samples, reducing the risk of hand burns.

[0054] From the above, it can be seen that the muffle furnace structure for quickly detecting the air reactivity of the prebaked anode can control the heating of the lateral electric heating tube 5 and the bottom electric heating tube 16 as needed when conducting the heating reaction of the cylindrical prebaked anode sample 7, thereby effectively realizing effective temperature control and heating of the internal heated furnace cavity 3, and improving the efficiency and effect of the heating reaction; in addition, the muffle furnace structure adopts an upper cover opening method, which can realize automatic lifting and lowering of sampling and layout, effectively ensuring safety when sampling the cylindrical prebaked anode sample 7, and avoiding burns caused by misoperation. The load-bearing sensors installed at the bottom of the four synchronous lifting cylinders 8 can constantly detect the weight changes of the cylindrical prebaked anode sample 7 after the heating reaction and before and after sampling, so as to obtain the reactivity of the cylindrical prebaked anode sample 7 after calculation and analysis; when taking and placing the cylindrical prebaked anode sample 7, the lifting and lowering of the sample support unit 6 can be achieved by lifting and lowering the synchronous positioning mechanisms on both sides, thereby driving the lifting and lowering of the sample grid plate 604 and the lifting and lowering of the cylindrical prebaked anode sample 7 placed thereon, so that the cylindrical prebaked anode sample 7 is separated from the outside of the heat-conducting furnace body 1 to achieve rapid cooling.

[0055] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model. For technicians in this technical field, any replacement improvements or changes made to the implementation methods of the utility model fall within the protection scope of the utility model.

[0056] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A muffle furnace structure for rapidly detecting the air reactivity of a prebaked anode, comprising a heat-conducting furnace body, the bottom of which is fixedly mounted on the top of a bottom support seat, and a heated furnace cavity is arranged inside the heat-conducting furnace body, characterized in that: The top of the heated furnace cavity is open, and an annular heating cavity is circumferentially arranged on the outer wall of the heat-conducting furnace body outside the heated furnace cavity, and a lateral electric heating tube is spirally wound inside the annular heating cavity, and the lateral electric heating tube is connected to an external heating power supply; a top cover unit is sealed and installed on the top of the heated furnace cavity, and the central bottom of the top cover unit is plugged on the inner wall of the heated furnace cavity; the outer bottom of the top cover unit is detachably fixedly sleeved on the upper outer wall of the heat-conducting furnace body; a sample supporting unit is installed inside the heated furnace cavity below the top cover unit, and the upper left and right sides of the sample supporting unit are extended to the outside of the heat-conducting furnace body; synchronous positioning mechanisms are respectively installed on the top of the bottom support seats on the left and right sides of the heat-conducting furnace body, and the tops of the two synchronous positioning mechanisms are installed at the sample supporting units on the corresponding sides.

2. A muffle furnace structure for rapidly detecting the air reactivity of a prebaked anode according to claim 1, characterized in that: The two synchronous position control mechanisms are in a synchronous lifting state when in working state.

3. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 2, characterized in that: The sample supporting unit includes a horizontal supporting portion, the outer side of the horizontal supporting portion is bent vertically upward to form an inverted U-shaped clamping portion, the outer vertical section of the inverted U-shaped clamping portion extends downward and is bent horizontally at the end to form a horizontal connecting portion, the front and rear ends of the horizontal connecting portion are connected to the top of the corresponding synchronous positioning mechanism below, and the top of the horizontal supporting portion is used to support the sample setting mesh plate placed above it.

4. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 3, characterized in that: Both sides of the lofting mesh plate are respectively in contact with the side walls of the vertical section on the inner side of the inverted U-shaped clamping portion at corresponding positions, and the top of the lofting mesh plate is used to place the cylindrical prebaked anode sample to be tested.

5. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 4, characterized in that: When the cylindrical prebaked anode sample is in a heating reaction state, the tops of the U-shaped grooves of the inverted U-shaped clamping parts on both sides abut against the top of the heat-conducting furnace body and the tops of the inverted U-shaped clamping parts on both sides are pressed and positioned by the top cover unit.

6. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 5, characterized in that: The synchronous positioning mechanism includes two synchronous lifting electric cylinders vertically arranged below the horizontal connection part of the sample supporting unit on the same side, the bottoms of the two lifting electric cylinders are respectively fixed to the tops of the corresponding weighing sensors below, the bottoms of each weighing sensor are fixedly mounted on the top of the bottom support seat, and the top of the piston rod of each synchronous lifting electric cylinder is provided with an external thread section, the upper part of the external thread section passes through the mounting hole on the horizontal connection part and clamps the horizontal connection part through a locking nut threaded on its outer side wall.

7. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 6, characterized in that: Each weighing sensor is connected to a display installed on the front side wall of the heat-conducting furnace body through a signal line and a wire.

8. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 7, characterized in that: The top cover unit includes a high temperature resistant top cover, a middle plug body portion of the high temperature resistant top cover is matched with a plug and installed on the upper inner wall of the heating furnace cavity, and an outer ring portion of the high temperature resistant top cover is sleeved on the upper outer wall of the heat-conducting furnace body and is fixed to the upper outer wall of the heat-conducting furnace body by a plurality of quick-release bolts.

9. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 8, characterized in that: A bottom heating inner cavity is arranged at the bottom of the heat-conducting furnace body, a plurality of bottom electric heating tubes are laid inside the bottom heating inner cavity, and each of the bottom electric heating tubes is connected to an external power source; A high-temperature resistant anti-stick coating is sprayed on the inner wall of the heating furnace cavity; and a high-temperature resistant heat-insulating layer is arranged on the outer side wall of the heat-conducting furnace body.

10. A muffle furnace structure for rapid detection of air reactivity of prebaked anodes according to claim 9, characterized in that: When the cylindrical prebaked anode sample is placed, the bottom of the sample placing screen is higher than the top of the heat-conducting furnace body.

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