A mechanism for quick replacement of smelting furnace crucibles and a method of using the same

Abstract

The application relates to a mechanism for quickly replacing a smelting furnace crucible and a use method thereof, which comprises a crucible inner liner, a heating mechanism is sleeved on the crucible inner liner; a shaped crucible is placed in the crucible inner liner; high-temperature-resistant filler is arranged between the crucible inner liner and the shaped crucible, and is used for fixing the shaped crucible and conducting heat; a top cover is detachably used for centering and clamping the shaped crucible, and can also be nested with the crucible inner liner, so that the shaped crucible and the crucible inner liner are in a concentric position. The application has the advantages of compact and reasonable structure, convenient operation, use of different mesh high-temperature-resistant fillers under the condition of not using a bonding agent, formation of firm and non-loose filling, adoption of the structural design of the top cover, guarantee of the concentric arrangement of the crucible inner liner and the shaped crucible, improvement of the uniformity of subsequent heating, simple and convenient operation of the application, high efficiency, a replacement period of about 40 minutes, and low requirement for personnel skills.

Description

Technical Field

[0001] This invention relates to the field of melting and casting technology, and in particular to a mechanism for quickly changing the crucible of a melting furnace and its method of use. Background Technology

[0002] Investment casting is an ancient casting process. The development of the casting industry is a sign of a country's production strength, and for the molding of aerospace parts, complex structural components, and medical devices, investment casting has become one of the main technologies for achieving mass production.

[0003] In the investment casting production process, the most important step is the melting of the master alloy. The most important tool in the melting process is the crucible. The quality of the crucible not only affects its service life but also the content of inclusions in the molten metal, ultimately affecting the quality of the casting.

[0004] Traditional methods for deep processing of crucibles include: mixing magnesium oxide, calcium oxide, or aluminum oxide sand with water glass in a certain proportion, filling the space between the crucible and the crucible lining, and repeatedly tamping and compacting it.

[0005] Meanwhile, uniform heating of the crucible cannot be guaranteed throughout the manufacturing process because the distance between the crucible and the crucible liner cannot be accurately controlled. The best result requires that the two be absolutely concentric and that their sidewalls be absolutely parallel. However, in existing technologies, this is generally controlled manually, which introduces significant errors.

[0006] Furthermore, regarding the selection of filler material, since water glass requires high temperatures to undergo phase transformation and harden, a metal block needs to be placed in the crucible for induction heating and baking to harden the water glass and remove moisture. This manufacturing method is cumbersome, with a replacement cycle of about 6 hours, requiring highly skilled personnel, and the furnace operation poses certain safety hazards. Most importantly, the quality of the crucible is poor; after several furnace pours, long cracks often appear on the crucible, reducing the yield rate of the cast parts. Additionally, due to the high strength of hardened water glass, replacing the crucible later is very inconvenient.

[0007] Therefore, we propose a mechanism for quickly changing the crucible in a melting furnace and its usage method. Summary of the Invention

[0008] In response to the shortcomings of the existing production technology, the applicant provides a mechanism and method for quickly replacing the crucible in a melting furnace. By using high-temperature resistant fillers of different mesh sizes, a reliable and non-loose filling is formed. At the same time, the top cover structure design ensures that the crucible lining and the formed crucible are concentrically arranged, thereby improving the uniformity of subsequent heating.

[0009] The technical solution adopted in this invention is as follows: A mechanism for quickly changing a smelting furnace crucible includes: a crucible liner on which a heating mechanism is fitted; a molded crucible placed inside the crucible liner; a high-temperature resistant filler disposed between the crucible liner and the molded crucible for fixing the molded crucible and conducting heat; and a top cover that can be detachably used to center and clamp the molded crucible, and can also be nested with the crucible liner to ensure that the molded crucible and the crucible liner are concentric.

[0010] Optionally, the top cover includes: a cover plate, which covers both the crucible liner and the top of the formed crucible; a tensioning mechanism located at the center of the lower end of the cover plate and provided with multiple telescopic drive shafts; multiple top blocks, which are correspondingly connected to the telescopic drive shafts for tensioning and fixing the inner wall of the formed crucible; a positioning ring, which is arranged around the top blocks and nested with the crucible liner; and multiple filling holes, which are arranged around the top cover between the top blocks and the positioning rings for filling with high-temperature resistant filler.

[0011] Optionally, the upper end of the cover plate is connected to a handle, and the handle is provided with a switch for controlling the tensioning mechanism.

[0012] Optionally, the crucible liner has an inner bevel and the positioning ring has an outer bevel to improve the fitting effect.

[0013] Optionally, the high-temperature resistant filler includes mixed zircon sand and magnesia sand. The mixed zircon sand includes two types of zircon sand with a mesh size multiple of 20-40. The mesh size of the magnesia sand is 3-5 times that of the finest zircon sand. The weight ratio of the coarsest zircon sand to magnesia sand to the finest zircon sand is (1-1.5):(1-1.5):(7-8). The high-temperature resistant filler is solidified between the crucible lining and the formed crucible by adjusting with a tamping rod.

[0014] Optionally, the upper end of the high-temperature resistant filler is covered with high-temperature resistant cotton, and the upper end of the high-temperature resistant cotton is covered with high-temperature resistant fiber rope.

[0015] Optionally, the molded crucible extends beyond the crucible liner, and the distance between the opening of the molded crucible and the liner is ≥25 mm.

[0016] Optionally, a copper induction coil is fitted onto the inner lining of the crucible.

[0017] A method for using a mechanism for quickly changing a smelting furnace crucible includes the following steps: measuring the height of the crucible lining and the forming crucible, and determining the height of the high-temperature resistant filler sand to be laid on the bottom of the crucible lining based on a crucible opening height ≥25 mm, and tamping it down to a smooth surface using a tamping rod; placing the top cover on the forming crucible and placing multiple top blocks in the inner wall of the forming crucible, achieving centering and fixation by activating the tensioning mechanism; placing the top cover that fixes the forming crucible on the crucible lining and engaging the positioning ring into the inner bevel of the crucible lining; filling the space between the crucible lining and the forming crucible with high-temperature resistant filler through the filling hole, and tamping it down to a smooth surface using a tamping rod; removing the top cover and sequentially laying high-temperature resistant cotton and high-temperature resistant fiber rope onto the high-temperature resistant filler.

[0018] Optionally, the high-temperature resistant fiber rope is wound and laid flat along the edge of the molded crucible to the edge of the crucible liner, and the gap between the high-temperature resistant fiber ropes is less than 1 mm.

[0019] The beneficial effects of this invention are as follows: This invention features a compact and rational structure, and is easy to operate. Without the use of binders, it utilizes high-temperature resistant fillers of varying mesh sizes to form a reliable and non-loose filling. The top-cover design ensures that the crucible lining and the formed crucible are concentric, improving the uniformity of subsequent heating. Furthermore, this invention is simple and convenient to operate, highly efficient, with a replacement cycle of approximately 40 minutes, and requires minimal operator skill. In addition, crucible removal is convenient and efficient; a vacuum cleaner is all that's needed to remove the filling, and some materials can be reused, effectively avoiding the dust pollution and high labor intensity associated with traditional crucible removal methods.

[0020] In addition, the present invention also has the following advantages: (1) The top cover is naturally placed on the forming crucible, which ensures that the top cover and the crucible opening of the forming crucible are parallel and that multiple top blocks are placed in the inner wall of the forming crucible. The centering and fixing are achieved by starting the tensioning mechanism, so that the forming crucible is located in the center of the top cover. The top cover that fixes the forming crucible is placed on the crucible liner and the positioning ring is engaged in the inner bevel of the crucible liner. Since the positioning ring and the inner bevel of the crucible liner are correspondingly set, when the two are engaged, it can also ensure that the forming crucible and the crucible liner are concentric, that is, the side wall of the forming crucible is parallel to the side wall of the crucible liner, which improves the uniformity of subsequent heating and improves the heating effect.

[0021] (2) By filling the space between the molded crucible and the crucible liner with high-temperature resistant fillers of different coarsenesses that are stored at high temperatures, the finer zircon sand can fill the gaps between the coarser sand. After tamping, the zircon sand is kept from becoming loose without the need for adhesives. High-temperature resistant cotton and high-temperature resistant fiber rope are used to cover the zircon sand to prevent it from falling out or becoming loose, thus completing the deep processing of the crucible. After the crucible is used, simply remove the high-temperature resistant cotton and high-temperature resistant fiber rope at the top, use a vacuum cleaner to suck out the mixed zircon sand, and the waste crucible can be removed. The mixed zircon sand can be reused. This makes the entire crucible replacement process simple, quick, low-cost, and requires low personnel skills.

[0022] (3) The mixed zircon sand includes two types of zircon sand with a mesh size ratio of 20-40 times. The mesh size of the magnesia sand is 3-5 times that of the finest zircon sand, and the weight ratio of the coarsest zircon sand to the magnesia sand to the finest zircon sand is (1-1.5):(1-1.5):(7-8). The high-temperature resistant filler is solidified between the crucible lining and the formed crucible by adjusting the tamping rod. By adopting this mesh size ratio and weight ratio, a stable structure can be formed between the various sands. After subsequent tamping, it can approach a solid state, thus replacing the water glass mentioned in the background technology as a new type of filler, and is also convenient for recycling and reuse. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the positioning and assembly structure of the formed crucible in this invention.

[0025] Figure 3 This is a schematic diagram of the top cover structure in this invention.

[0026] Figure 4 This is a schematic diagram of the square tamping rod structure in this invention.

[0027] Figure 5 This is a schematic diagram of the pointed tamping rod structure in this invention.

[0028] The components include: 1. Copper induction coil; 2. Crucible lining; 3. Mixed zircon sand; 4. Top cover; 5. Molded crucible; 6. High-temperature resistant cotton; 7. High-temperature resistant fiber rope; 8. Square tamping rod; 9. Pointed tamping rod. 401. Handle; 402. Cover plate; 403. Tensioning mechanism; 404. Top block; 405. Positioning ring; 406. Filling hole; L is the height of the high-temperature resistant filler at the bottom of the crucible; H is the height of the crucible opening from the inner lining of the crucible. Detailed Implementation

[0029] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0030] like Figure 1-5 As shown, the mechanism for quickly replacing the smelting furnace crucible in this embodiment includes a crucible liner 2, a shaped crucible 5, a high-temperature resistant filler, a top cover 4, high-temperature resistant cotton 6, and a high-temperature resistant fiber rope 7.

[0031] A heating mechanism is fitted on the inner lining 2 of the crucible. In this embodiment, the mechanism for quickly changing the crucible of the smelting furnace is provided. A copper induction coil 1 is fitted on the inner lining 2 of the crucible. The heating effect and uniformity are improved by the copper induction coil 1.

[0032] The forming crucible 5 is placed inside the crucible liner 2 for heating and deep processing. At the same time, the forming crucible 5 is preheated before heating to improve heating efficiency and prevent excessive temperature difference from affecting the quality of the finished product. In this embodiment, the mechanism for quickly changing the crucible of the smelting furnace has a high-temperature resistant cotton 6 laid on the upper end of the high-temperature resistant filler, and a high-temperature resistant fiber rope 7 laid on the upper end of the high-temperature resistant cotton 6.

[0033] In this embodiment, the mechanism for quickly changing the crucible of the melting furnace is such that the formed crucible 5 extends out of the crucible liner 2, and the distance between the crucible opening of the formed crucible 5 and the crucible liner 2 is ≥25 mm.

[0034] like Figure 3 As shown, in this embodiment, the top cover 4 is the most core technical improvement. The top cover 4 can be detachably used to center and clamp the formed crucible 5, and can also be nested with the crucible liner 2 so that the formed crucible 5 and the crucible liner 2 are in a concentric position.

[0035] Among them, such as Figure 2 and Figure 3 As shown, the mechanism for quickly changing the crucible of the smelting furnace in this embodiment includes a top cover 4, a cover plate 402, a tensioning mechanism 403, a positioning ring 405, a filling hole 406, and a handle 401.

[0036] Specifically, such as Figure 3 As shown: The cover plate 402 is simultaneously placed on top of the crucible liner 2 and the formed crucible 5; The tensioning mechanism 403 is located at the center of the lower end of the cover plate 402 and is provided with multiple telescopic drive shafts; there are multiple top blocks 404 and they are connected to the telescopic drive shafts to tension and fix the inner wall of the forming crucible 5. The positioning ring 405 is positioned outside the top block 404 and nested with the crucible liner 2; There are multiple filling holes 406, which are arranged in a ring around the top cover 4 between the top block 404 and the positioning ring 405, for filling with high-temperature resistant filler.

[0037] In this embodiment, the mechanism for quickly changing the crucible of the smelting furnace has a handle 401 connected to the upper end of the cover plate 402, and a switch for controlling the tensioning mechanism 403 is provided on the handle 401.

[0038] The mechanism for quickly changing the crucible of the smelting furnace in this embodiment has an inner bevel on the inner lining 2 of the crucible and an outer bevel on the positioning ring 405 to improve the fitting effect.

[0039] High-temperature resistant filler is placed between the crucible liner 2 and the molded crucible 5 to fix the molded crucible 5 and conduct heat. The mechanism for quickly changing the crucible of the smelting furnace in this embodiment includes high-temperature resistant fillers, namely mixed zircon sand 3 and magnesia sand. Zircon sand reacts with some metals to form salts, while magnesia sand, whose main component is magnesium oxide, has strong chemical stability. Mixing it in mixed zircon sand 3 can improve the overall mixing effect and increase the strength, and can also block the reaction between zircon sand and some metals.

[0040] The mixed zircon sand 3 includes two types of zircon sand with a mesh size multiple of 20-40. The mesh size of the magnesia sand is 3-5 times that of the finest zircon sand, and the weight ratio of the coarsest zircon sand to the magnesia sand to the finest zircon sand is (1-1.5):(1-1.5):(7-8). The high-temperature resistant filler is adjusted and solidified between the crucible liner 2 and the formed crucible 5 by tamping rod.

[0041] By adopting this mesh size ratio and weight ratio, a stable structure can be formed between various types of sand. After subsequent tamping, it can approach a solid state, thus replacing the water glass mentioned in the background technology as a new type of filler, while also facilitating recycling and reuse.

[0042] The operating method of the mechanism for quickly changing the crucible in a melting furnace includes the following steps: Take out the mixed zircon sand and the 25Kg molding crucible 5 stored in the 150℃ heat preservation box; Measure the height of the crucible liner 2 and the formed crucible 5. Based on the fact that the height H of the crucible opening from the crucible liner is ≥25 mm, that is, the height of the crucible opening from the copper induction coil 1 needs to be ≥25 mm to prevent the crucible opening from overheating, determine the height of the high-temperature resistant filler sand to be laid at the bottom of the crucible liner 2, and use a tamping rod to tamp it until it is flat. The top cover 4 is placed on the molding crucible 5, and multiple top blocks 404 are placed in the inner wall of the molding crucible 5. Centering and fixation are achieved by activating the tensioning mechanism 403. Place the top cover 4 that holds the molded crucible 5 onto the crucible liner 2, and engage the positioning ring 405 into the inner bevel of the crucible liner 2. High-temperature resistant filler is filled between the crucible liner 2 and the formed crucible 5 through the filling hole 406, and then tamped and cured to a smooth surface using a tamping rod. Remove the top cover 4, and then lay the high-temperature resistant cotton 6 and the high-temperature resistant fiber rope 7 onto the high-temperature resistant filler in sequence.

[0043] A layer of high-temperature resistant fiber rope 7 is wrapped around the edge of the molded crucible 5 and laid flat to the edge of the crucible liner 2, with the gap between the high-temperature resistant fiber ropes 7 being less than 1mm.

[0044] Specifically, taking a crucible 5 with a height of 325mm and a lining depth of 315mm as an example, the method of using this quick-change furnace crucible mechanism includes the following steps: Take some mixed zircon sand at the bottom of crucible liner 2 and tamp it with a square tamping rod 8 until it is flat. To ensure that the height H of the crucible opening from the crucible liner is 25mm, the height L of the high-temperature resistant filler at the bottom of the crucible is calculated to be 15mm based on the height of the formed crucible 5 (325mm) and the depth of the crucible liner 2 (315mm). The top cover 4 is naturally placed on the forming crucible 5, which ensures that the top cover 4 and the crucible opening of the forming crucible 5 are parallel, and multiple top blocks 404 are placed in the inner wall of the forming crucible 5. The centering and fixing are achieved by activating the tensioning mechanism 403, so that the forming crucible 5 is located in the center position of the top cover 4. Place the top cover 4 that fixes the shaped crucible 5 onto the crucible liner 2, and engage the positioning ring 405 into the inner bevel of the crucible liner 2. Since the positioning ring 405 is set to correspond to the inner bevel of the crucible liner 2, when the two are engaged, it can also ensure that the shaped crucible 5 and the crucible liner 2 are concentric, that is, the side wall of the shaped crucible 5 is parallel to the side wall of the crucible liner 2, which improves the uniformity of subsequent heating and improves the heating effect. High-temperature resistant filler is filled between the crucible liner 2 and the formed crucible 5 through the filling hole 406. The weight ratio of each mesh size of the mixed zircon sand and magnesia sand is 80 mesh: 16 mesh: 4 mesh = 1:1:8. Evenly sprinkle the mixed zircon sand 3 and magnesia sand between the crucible liner 2 and the shaped crucible 5. When the height reaches 100mm, first use the pointed tamping rod 9 to tamp until the pointed tamping rod 9 can only be inserted 5mm. Then use the square tamping rod 8 to tamp until it is flat, until it is 25mm away from the top edge of the coil. The high-temperature resistant filler and the molded crucible 5 need to be stored in a 150℃ incubator for 8 hours; Remove the top cover 4, and then lay the high-temperature resistant cotton 6 and the high-temperature resistant fiber rope 7 onto the high-temperature resistant filler in sequence; According to the outer dimensions of the crucible liner 2 and the formed crucible 5, high-temperature resistant cotton 6 (Morgan Superwool Superwool Plus paper, 5mm thick) is cut out in concentric circles with an inner diameter of 175mm and an outer diameter of 270mm, and laid flat on top of the mixed zircon sand. Wrap a layer of high-temperature resistant fiber rope 7 (ceramic fiber rope produced in Langfang, Hebei) around the edge of the crucible and lay it flat to the edge of the inner lining 2 of the crucible. Each turn of the high-temperature resistant fiber rope 7 should be tight until a 1mm diameter steel wire cannot be fully inserted.

[0045] High-temperature resistant cotton 6 (Morgan Superwool Plus paper, 5mm thick) and high-temperature resistant fiber rope 7 (ceramic fiber rope produced in Langfang, Hebei) need to withstand high temperatures of 1200℃; high-temperature resistant fiber rope 7 has a diameter of 20mm and can withstand a load of 45kg. Crucible removal steps: After the crucible has been used, once the temperature has dropped below 500℃, use a screwdriver to separate the high-temperature resistant fiber rope 7 and the high-temperature resistant cotton 6. Use a special metal vacuum cleaner to suck out the high-temperature resistant filler around the molding crucible 5 until about two-thirds of the molding crucible 5 is exposed. Then the molding crucible 5 can be removed through the top cover 4. The molding crucible 5 is free of cracks and defects and can be reused. Move the molding crucible 5 into a 150℃ heat preservation box. All remaining mixed zircon sand in crucible liner 2 was sucked into a special vacuum cleaner and transferred to a metal container, which was then placed in a 150°C insulated box for storage until use.

[0046] If the combined weight of the mixed zircon sand 3 or magnesia sand of 16 mesh and 80 mesh exceeds 70% of the total weight, the high-temperature resistant filler must be discarded or reconfigured.

[0047] The purpose of this invention is to solve the problems of complex deep processing procedures, high costs, long production cycles, and low quality stability in existing crucibles. By filling the space between the crucible and its inner lining 2 with a mixture of zircon sand of varying coarseness, stored at high temperatures, the finer zircon sand fills the gaps between the coarser sand. After tamping, the zircon sand remains intact even without adhesive. Covering the zircon sand with high-temperature resistant cotton 6 and high-temperature resistant fiber rope 7 prevents the zircon sand from falling out or loosening, thus completing the deep processing of the crucible. After use, simply remove the high-temperature resistant cotton 6 and high-temperature resistant fiber rope 7, and use a vacuum cleaner to remove the mixed zircon sand, thus removing the waste crucible. The mixed zircon sand can be reused. This makes the entire crucible replacement process simple, quick, low-cost, and requires minimal personnel skills.

[0048] This invention uses mixed zircon sand and a molded crucible 5 in a high-temperature insulation box to form a reliable and non-loose filling by using high-temperature resistant fillers of different mesh sizes without the use of binders. This invention is simple and convenient to operate, highly efficient, with a replacement cycle of about 40 minutes, and low skill requirements for personnel. In addition, the crucible removal process is also convenient and efficient, requiring only a vacuum cleaner to remove the filling and reusing some of the raw materials, effectively avoiding the disadvantages of dust pollution and high labor intensity in traditional crucible removal.

[0049] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A mechanism for quickly changing a smelting furnace crucible, characterized in that, include: The crucible liner (2) is fitted with a heating mechanism; A shaped crucible (5) is placed inside the crucible liner (2); High-temperature resistant filler is placed between the crucible liner (2) and the molded crucible (5) to fix the molded crucible (5) and conduct heat. The top cover (4) can be detachably used to center and clamp the shaped crucible (5), and can also be nested with the crucible liner (2) so that the shaped crucible (5) and the crucible liner (2) are in a concentric position. The top cover (4) includes: A cover plate (402) is placed on top of both the crucible liner (2) and the formed crucible (5); The tensioning mechanism (403) is located at the center of the lower end of the cover plate (402) and is provided with multiple telescopic drive shafts; Multiple top blocks (404) are connected to the telescopic drive shaft to tighten and fix the inner wall of the forming crucible (5). Positioning ring (405), which is located outside the top block (404) and nested and connected to the crucible liner (2); Multiple filling holes (406) are arranged around the top cover (4) between the top block (404) and the positioning ring (405) for filling with high-temperature resistant filler.

2. The mechanism for quickly changing the crucible of a smelting furnace as described in claim 1, characterized in that: The upper end of the cover plate (402) is connected to a handle (401), and the handle (401) is provided with a switch for controlling the tensioning mechanism (403).

3. The mechanism for quickly changing the crucible of a smelting furnace as described in claim 1, characterized in that: The crucible liner (2) has an inner bevel and the positioning ring (405) has an outer bevel to improve the fitting effect.

4. The mechanism for quickly changing the crucible of a smelting furnace as described in claim 1, characterized in that: The high-temperature resistant filler includes mixed zircon sand (3) and magnesia sand. The mixed zircon sand (3) includes two types of zircon sand with a mesh size multiple of 20-40 times. The mesh size of the magnesia sand is 3-5 times that of the finest zircon sand. The weight ratio of the coarsest zircon sand to the magnesia sand to the finest zircon sand is (1-1.5):(1-1.5):(7-8). The high-temperature resistant filler is solidified between the crucible liner (2) and the molded crucible (5) by adjusting with a tamping rod.

5. The mechanism for quickly changing the crucible of a smelting furnace as described in claim 1, characterized in that: The high-temperature resistant filler is covered with high-temperature resistant cotton (6) at the top end, and high-temperature resistant fiber rope (7) is laid on the top end of the high-temperature resistant cotton (6).

6. The mechanism for quickly changing the crucible of a smelting furnace as described in claim 1, characterized in that: The molded crucible (5) extends out of the crucible liner (2), and the distance between the crucible opening of the molded crucible (5) and the crucible liner (2) is ≥25 mm.

7. The mechanism for quickly changing the crucible of a smelting furnace as described in claim 1, characterized in that: A copper induction coil (1) is fitted onto the inner lining (2) of the crucible.

8. The method of using the mechanism for quickly changing the crucible of a smelting furnace as described in claim 2, characterized in that: Includes the following steps: Measure the height of the crucible liner (2) and the formed crucible (5), and determine the height of the high-temperature resistant filler sand to be laid at the bottom of the crucible liner (2) based on the distance of the crucible mouth from the crucible liner (2) being ≥25 mm, and use a tamping rod to tamp it until it is flat. The top cover (4) is placed on the molding crucible (5), and multiple top blocks (404) are placed in the inner wall of the molding crucible (5). Centering and fixation are achieved by activating the tensioning mechanism (403). Place the top cover (4) that fixes the shaped crucible (5) onto the crucible liner (2) and make the positioning ring (405) engage with the inner bevel of the crucible liner (2); High-temperature resistant filler is filled between the crucible liner (2) and the molded crucible (5) through the filling hole (406), and then tamped and solidified by a tamping rod. Remove the top cover (4) and lay the high-temperature resistant cotton (6) and high-temperature resistant fiber rope (7) onto the high-temperature resistant filler in sequence.

9. The method of using the mechanism for quickly changing the crucible of a smelting furnace as described in claim 8, characterized in that: The high-temperature resistant fiber rope (7) is wrapped and laid flat along the edge of the molded crucible (5) to the edge of the crucible liner (2), and the gap between the high-temperature resistant fiber ropes (7) is less than 1 mm.

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