Efficient environment-friendly precious metal smelting furnace

Abstract

The invention provides an efficient and environment-friendly precious metal smelting furnace, and relates to the technical field of smelting furnaces. An efficient and environment-friendly precious metal smelting furnace comprises a smelting body and a moving mechanism. The smelting body comprises a guide connecting mechanism, a plurality of smelting cylinders and a plurality of induction coils. The multiple smelting cylinders are arranged on the guide connecting mechanism and are sequentially and detachably connected in the axis direction. The multiple induction coils are coaxially wound on the outer sides of the multiple smelting barrels in a one-to-one correspondence mode, the multiple induction coils form a moving channel in the axis direction, and the multiple smelting barrels can move along with the guiding connecting mechanism and penetrate through the moving channel one by one. A partition plate is arranged between every two adjacent smelting barrels, every two adjacent smelting barrels are separated by the corresponding partition plate, and screen holes are formed in the partition plates. The moving mechanism is connected with the guiding connecting mechanism and used for driving the guiding connecting mechanism to move. The smelting efficiency can be greatly improved, meanwhile, precious metal liquid can be efficiently collected, and later pouring is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smelting furnaces, in particular to a high-efficiency and environmentally-friendly noble metal smelting furnace. BACKGROUND

[0002] Palladium, silver and platinum are important noble metal materials, which are widely present in various industrial waste. Under the background of global resource shortage, the mineral resources of the above-mentioned metals are gradually scarce. The proven reserves of palladium, platinum and other resources in China account for a low proportion of the world total, and a considerable part still needs to rely on imports, resulting in the continuous rise of their market prices. In the process of industrial production, a large amount of waste containing such noble metals will be produced. If it is discarded as ordinary waste, not only the valuable resources will be seriously wasted, but also the soil and water environment will be polluted, and the enterprises will also suffer economic losses. Therefore, extracting palladium, silver, platinum and other metals from waste not only helps to reduce the production cost of enterprises, but also is an important practice for sustainable use of resources. In the process of noble metal recovery, fire assay is a common analysis and enrichment method, which measures the content of noble metals in minerals or metal products through melting and roasting, and realizes enrichment and recovery. At present, in order to improve the smelting efficiency, high-frequency furnace smelting method has appeared in the prior art. High-frequency smelting generates a strong magnetic field in a purple copper coil through high-frequency current, so that eddy current is formed in the metal and Joule heat is generated, realizing rapid heating and smelting. This method uses high-frequency smelting furnace to complete, which can accurately control the temperature and avoid the volatilization of noble metals.

[0003] For example, patent publication (announcement) No. CN111551026A discloses an alloy smelting furnace, relating to the technical field of metal smelting. The present application comprises a high-frequency induction heating machine and a furnace body. The high-frequency induction heating machine is fixedly connected with a controller on the right side wall. The output end of the controller is electrically connected with the input end of the high-frequency induction heating machine. Two conductors are fixedly connected with the high-frequency induction heating machine on the front side wall bottom. The two conductors are both fixedly connected with an induction coil on one end. The furnace body is located inside the induction coil. A limiting mechanism is arranged on the front side wall of the high-frequency induction heating machine. The limiting mechanism is rotatably connected with the peripheral surface of the furnace body. The present application realizes the self-rotation of the furnace body in the induction coil by using the driving mechanism, which can uniformly heat the alloy. After the alloy is melted, the self-rotation speed of the furnace body is accelerated. The centrifugal force during rotation is used to discharge the melted alloy from the furnace body. The uninterrupted alloy smelting is realized. The speed of alloy smelting is improved. The pouring of the furnace body is avoided. The safety of production is improved. The prior art disclosed in such a patent publication is to heat the metal by energizing the induction coil. Although the smelting efficiency is greatly improved, the prior art still has the following defects: 1. Since all the metals are in one furnace body, the heating efficiency of the metal located at the center of the furnace body is relatively reduced due to the influence of eddy current; 2. The noble metal heated by the induction coil has no preheating link, which will affect the heating efficiency; 3. There are a large number of gaps between the metals before smelting, which cannot be compacted. The volume of the metal liquid formed after the smelting of the metal in the furnace body is obviously less than the volume of the furnace body. When large or medium-sized molds need to be poured, multiple furnace bodies need to be used for smelting, and then the metal liquid is concentrated and poured, which is very time-consuming and laborious. 4. The noble metal is directly heated by the high-power induction coil. The heating speed will be too fast. The water, oil stains, polishing paste and other substances adsorbed on the inside or surface of the noble metal material will be rapidly vaporized. Since the metal surface may have been partially melted or softened, these vapors cannot escape smoothly, which will cause the metal liquid droplets to splash, which is easy to cause safety accidents. SUMMARY

[0004] The purpose of the present application is to provide a high-efficiency and environmentally friendly noble metal smelting furnace, which can greatly improve the smelting efficiency, and can efficiently collect the noble metal liquid for subsequent pouring.

[0005] The embodiments of the present application are implemented as follows:

[0006] The embodiments of the present application provide a high-efficiency and environmentally friendly noble metal smelting furnace, which comprises a smelting main body and a moving mechanism. The smelting main body comprises a guide connecting mechanism, a plurality of smelting cylinders and a plurality of induction coils. The plurality of smelting cylinders are arranged on the guide connecting mechanism. The plurality of smelting cylinders are sequentially and separably connected along the axial direction. The plurality of induction coils are coaxially arranged outside the plurality of smelting cylinders one by one. The plurality of induction coils form a moving channel along the axial direction. The plurality of smelting cylinders can move with the guide connecting mechanism and pass through the moving channel one by one. The power of the plurality of induction coils increases sequentially along the moving direction of the smelting cylinders.

[0007] A partition is provided between adjacent smelting cylinders, the partition separating two adjacent smelting cylinders, and the partition is provided with sieve holes;

[0008] The moving mechanism is connected to the guiding connection mechanism and is used to drive the guiding connection mechanism to move along the axial direction of the induction coil.

[0009] In some embodiments of the present invention, the above-mentioned guiding connection mechanism includes a guide cylinder, and a plurality of the melting cylinders are coaxially arranged in the guide cylinder in sequence along the axial direction. Each melting cylinder can slide freely in the guide cylinder, and the moving mechanism is connected to the guide cylinder.

[0010] In some embodiments of the present invention, the sidewall of the guide cylinder is provided with a plurality of windows at uniform intervals.

[0011] In some embodiments of the present invention, the material of the guide cylinder is the same as that of the melting cylinder, both of which are materials with melting points higher than those of precious metals.

[0012] In some embodiments of the present invention, the above-mentioned moving mechanism includes a frame and a lifting cylinder. The lifting cylinder is disposed on the frame, and the lifting end of the lifting cylinder is connected to the guide cylinder for driving the guide cylinder to coaxially pass through the moving channel.

[0013] In some embodiments of the present invention, the partition is a frustum-shaped funnel structure, the sieve hole is opened at the bottom of the frustum-shaped funnel structure, one end of any melting cylinder is an open structure, the other end is connected to the frustum-shaped funnel structure, the protrusion of the frustum-shaped funnel structure is located outside the melting cylinder, and the frustum-shaped funnel structure on any melting cylinder can extend into the open structure of the adjacent melting cylinder.

[0014] In some embodiments of the present invention, a collecting cylinder is provided at one end of the guide cylinder that is away from the lifting cylinder, the smelting cylinder adjacent to the collecting cylinder is connected to the collecting cylinder, and the frustum-shaped funnel structure of the smelting cylinder extends into the collecting cylinder.

[0015] In some embodiments of the present invention, a plurality of sieve holes are included, which are evenly spaced on the partition plate.

[0016] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0017] 1. Since all the metals are inside a furnace, the heating efficiency of the metals located at the center of the furnace is relatively lower than that at the edges due to the influence of eddies;

[0018] The plurality of smelting cylinders in the application are smelted by the plurality of induction coils, the plurality of smelting cylinders reach the heating range of different induction coils in sequence to smelt by the guiding connection mechanism, the same volume of precious metals is heated by the plurality of smelting cylinders, the heating radius of the precious metals is obviously shortened, thus, the heating effect of the center of the smelting cylinder is obviously improved, and the smelting efficiency can be effectively improved.

[0019] 2. Since the power of the plurality of induction coils increases in sequence along the moving direction of the smelting cylinder, the induction coil is equivalent to stepwise heat the precious metals in the smelting cylinder within a specified time, the power of the induction coil which first heats the smelting cylinder is relatively low, and the precious metals are heated while the preheating effect is achieved, and the smelting efficiency is improved.

[0020] 3. The precious metals in liquid form after smelting flow into the smelting cylinder which first starts smelting through the sieve holes, and finally, all the metal liquids are discharged from the smelting cylinder, and the metal liquid collection is completed at one time, the amount of precious metals smelted at one time can meet the pouring amount in the later period, and the subsequent pouring is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is a structural schematic diagram of the embodiment of the application;

[0023] Figure 2 It is an enlarged view of A in FIG. 1; Figure 1

[0024] Figure 3 It is an enlarged view of B in FIG. 1; Figure 1

[0025] Figure 4 It is a structural schematic diagram of the guiding cylinder in the embodiment of the application;

[0026] Figure 5 It is a structural schematic diagram of the smelting cylinder in the embodiment of the application;

[0027] Figure 6 It is an enlarged view of C in FIG. 1; Figure 5

[0028] Figure 7 It is a connecting structure schematic diagram of the guiding cylinder and the lifting cylinder in the embodiment of the application;

[0029] Figure 8 ​​​Figure 1 is a schematic diagram of the connection structure of the guide cylinder and the collection cylinder in the embodiment of the present application.

[0030] Figure 1 is a schematic diagram of the connection structure of the guide cylinder and the collection cylinder in the embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0033] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0034] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the embodiments of the present application, "a plurality of" represents at least 2.

[0037] In the description of the embodiments of the present application, it also needs to be explained that, unless explicitly specified and limited, if the terms "set", "install", "connect", "connect" appear, they should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Embodiments

[0039] Please refer to Figures 1-8 The embodiment provides a high-efficiency environment-friendly noble metal smelting furnace, which comprises a smelting main body and a moving mechanism. The smelting main body comprises a guide connecting mechanism, a plurality of smelting cylinders 2 and a plurality of induction coils 3. The plurality of smelting cylinders 2 are arranged on the guide connecting mechanism, and the plurality of smelting cylinders 2 are sequentially and separably connected along the axial direction. The plurality of induction coils 3 are coaxially arranged outside the plurality of smelting cylinders 2 one by one, the plurality of induction coils 3 form a moving channel along the axial direction, the plurality of smelting cylinders 2 can move with the guide connecting mechanism and pass through the moving channel one by one, and the power of the plurality of induction coils 3 increases along the moving direction of the smelting cylinders 2. A partition plate 4 is arranged between adjacent smelting cylinders 2, the partition plate 4 separates two adjacent smelting cylinders 2, and a sieve hole 5 is formed in the partition plate 4. The moving mechanism is connected with the guide connecting mechanism and used for driving the guide connecting mechanism to move along the axial direction of the induction coil 3.

[0040] The plurality of smelting cylinders 2 can be sequentially arranged on the guide connecting mechanism, and the plurality of smelting cylinders 2 abut in sequence along the axial direction. The smelting cylinders 2 after abutting can be actually regarded as a long cylinder type smelting furnace body as a whole. The smelting furnace body entering the range of the induction coil 3 first will be heated and warmed up within a specified time. After warming up, it will enter the range of the next induction coil 3. Since the power of the next induction coil 3 is larger, the temperature of the noble metal in the smelting cylinder 2 will be further increased. In this way, the smelting cylinder 2 can be heated in a step-by-step warming-up manner. If one induction coil 3 directly heats all the noble metals in one smelting furnace body with large power, the rate of warming up of the noble metals will be relatively slow, and the noble metals will reach the melting temperature. After some noble metals in the smelting furnace body complete melting, other noble metals have not yet melted. The liquid noble metals that have melted first will consume energy and waste energy, and the time will be longer. The embodiment adopts the plurality of smelting cylinders 2 to reduce the amount of noble metals and shorten the time for the noble metals to reach the melting temperature. When the noble metals pass through the last smelting cylinder, they basically reach the melting standard. Therefore, the smelting efficiency can be improved, and the energy consumption can be reduced to save energy. The plurality of smelting cylinders 2 will sequentially reach the heating range of different induction coils 3 for smelting with the guide connecting mechanism. The plurality of smelting cylinders 2 are used to heat the same volume of noble metals, which obviously shortens the heating radius of the noble metals. In this way, the heating effect at the center of the smelting cylinder 2 will be obviously improved, and the smelting efficiency can be effectively improved. In addition, the previous induction coil 3 can also have a preheating effect to further improve the smelting efficiency. After smelting, the noble metals in liquid form will flow into the smelting cylinder 2 that starts smelting first through the sieve hole 5, and finally, all the metal liquids are discharged from the smelting cylinder 2 to complete the collection of metal liquids at one time. This can not only meet the casting amount after one-time smelting of noble metals, but also facilitate subsequent casting.

[0041] Please refer to Figure 4 In some embodiments of the present embodiment, the guide connecting mechanism includes a guide cylinder 1, and the plurality of smelting cylinders 2 are sequentially arranged coaxially in the guide cylinder 1 along the axial direction. Each smelting cylinder 2 can freely slide in the guide cylinder 1, and a moving mechanism is connected with the guide cylinder 1. The moving mechanism can drive the guide cylinder 1 to move as a whole, so that the plurality of smelting cylinders 2 in the guide cylinder 1 can enter the heating range of different induction coils 3 one by one. The guide cylinder 1 ensures the stability and accuracy of the smelting cylinder 2 during movement, avoids the deviation or shaking of the smelting cylinder 2 during heating, and thus guarantees the uniformity and efficiency of smelting. At the same time, the coaxial arrangement between the guide cylinder 1 and the smelting cylinder 2 enables the smelting cylinder 2 to maintain a consistent heating center during movement, further improving the heating effect and smelting efficiency. The reliable connection between the moving mechanism and the guide cylinder 1 ensures the smooth progress of the whole smelting process. In addition, the guide cylinder 1 can effectively constrain the smelting cylinder 2, so that the smelting cylinder 2 is coaxial, which facilitates the taking and placing of the smelting cylinder 2.

[0042] Please refer to Figure 4Further, in the embodiment, the side wall of the guide cylinder 1 is uniformly and spacedly provided with a plurality of windows 6. The windows 6 are used to reduce the wall thickness of the guide cylinder 1. The thinner the wall thickness, the higher the efficiency of the vortex flow and the Joule heat generated in the noble metal, and the faster the heating speed, thereby further improving the smelting efficiency.

[0043] It should be noted that, in the embodiment, the material of the guide cylinder 1 is the same as that of the smelting cylinder 2, and both are materials with a higher melting point than the noble metal. The material with a higher melting point than the noble metal ensures the stability of the guide cylinder 1 and the smelting cylinder 2 in a high-temperature environment, and avoids deformation, cracking or direct melting of the guide cylinder 1 and the smelting cylinder 2 due to material problems, thereby ensuring the safety of the smelting process. The selection of the material with a high melting point enables the guide cylinder 1 and the smelting cylinder 2 to withstand the high temperature generated during the smelting process, thereby ensuring the continuous and efficient operation of the smelting process.

[0044] Please refer to Figures 1-3 Specifically, in the embodiment, the moving mechanism includes a rack 7 and a lifting cylinder 8. The lifting cylinder 8 is arranged on the rack 7, and the lifting end of the lifting cylinder 8 is connected with the guide cylinder 1, and is used to drive the guide cylinder 1 to pass through the moving channel coaxially. The lifting end of the lifting cylinder 8 can withstand various thermal stresses generated during the smelting process, thereby ensuring the reliability of the entire moving mechanism. The lifting cylinder 8 is controlled by a corresponding control unit, which can accurately control the lifting amount of the lifting cylinder 8, thereby accurately controlling the corresponding smelting cylinder 2 to reach the position of the corresponding induction coil 3. The lifting cylinder 8 in the embodiment is provided with a position sensor, which can monitor the positions of the smelting cylinders 2 at the head and tail ends in real time. After the position information is sent to the control unit, the control unit can control the lifting cylinder 8 to drive the smelting cylinder 2 to be accurately adjusted to the position of the corresponding next induction coil 3, thereby realizing automatic control.

[0045] It should be noted that the control unit has a clock module, which can control the residence time of the smelting cylinder 2 in the corresponding induction coil 3 according to a preset program. For example, the residence time for smelting gold is 10s-15s, which can effectively heat the gold in a stepwise manner.

[0046] Please refer to Figure 5 and Figure 6, preferably, the partition plate 4 in the embodiment is a frustoconical funnel structure, the sieve hole 5 is arranged at the bottom of the frustoconical funnel structure, and the end of the arbitrary smelting cylinder 2 is an open structure, and the other end is connected with the frustoconical funnel structure. The protruding part of the frustoconical funnel structure is located outside the smelting cylinder 2, and the frustoconical funnel structure on the arbitrary smelting cylinder 2 can extend into the open structure of the adjacent smelting cylinder 2. The partition plate 4 of the frustoconical funnel structure can play a guiding role, facilitating the coaxial connection of two adjacent smelting cylinders 2. At the same time, the sieve hole 5 can effectively filter the impurities generated in the smelting process, ensuring the purity of the precious metal smelting. The protruding part of the frustoconical funnel structure is located outside the smelting cylinder 2, which can be conveniently extended into the open structure of the adjacent smelting cylinder 2. The frustoconical funnel structure on the arbitrary smelting cylinder 2 extends into the open structure of the adjacent smelting cylinder 2, and this nesting type further improves the connection stability and sealing performance between the smelting cylinders 2, effectively preventing the leakage of precious metals during smelting, and improving the smelting efficiency and safety.

[0047] It is worth noting that the guide cylinder 1 in the embodiment is vertically arranged, and the metal liquid leakage caused by the gap between the smelting cylinders 2 can be ignored.

[0048] Please refer to Figure 1 , Figure 3 and Figure 8 , further, the end of the guide cylinder 1 away from the lifting cylinder 8 is provided with a collecting cylinder 14, the smelting cylinder 2 adjacent to the collecting cylinder 14 is connected with the collecting cylinder 14, and the frustoconical funnel structure of the smelting cylinder 2 extends into the collecting cylinder 14. The above-mentioned collecting cylinder 14 is mainly used for collecting the molten metal liquid in the smelting cylinder 2 at the bottom. After the metal in all smelting cylinders 2 is melted, it enters the collecting cylinder 14 through the sieve hole 5. In this way, all the molten metal liquid can be effectively collected. It should be noted that due to the improvement of smelting efficiency, the metal liquid in the collecting cylinder 14 will not be cooled and formed in a short time, affecting the later pouring.

[0049] Please refer to Figure 6 , preferably, a plurality of sieve holes 5 are arranged on the partition plate 4, and the sieve holes 5 are uniformly and spaced apart on the partition plate 4.

[0050] Please refer to Figure 7 and Figure 8, it is worth mentioning that, in the embodiment, the guide cylinder 1 and the lifting cylinder 8 are provided with a detachable part, which comprises a first sleeve 12 and a first stud 13, the first stud 13 is coaxially connected with the piston rod of the lifting cylinder 8, the first sleeve 12 is coaxially connected with the guide cylinder 1, and the first sleeve 12 is in communication with the guide cylinder 1. The first stud 13 can extend into the first sleeve 12 and be threadedly connected with the first sleeve 12. The lifting cylinder 8 is rotatably arranged on the rack 7, and the lifting cylinder 8 is connected with a rotating mechanism for driving the rotation thereof, the rotating mechanism comprises a driven gear 10 and a driving gear 9 arranged on the cylinder body of the lifting cylinder 8. The driving gear 9 is rotatably arranged on the rack 7, and the driving gear 9 is connected with a driving motor 11 for driving the rotation thereof. The driving motor 11 can drive the rotation of the driving gear 9, the driving gear 9 is engaged with the driven gear 10, so that the cylinder body of the lifting cylinder 8 can be driven to rotate, so as to drive the piston rod of the lifting cylinder 8 to rotate, and the piston rod can drive the first stud 13 to screw into or out of the first sleeve 12 after rotating.

[0051] Please refer to Figure 7 and Figure 8 , correspondingly, the collecting cylinder 14 and the guide cylinder 1 are also provided with a detachable part (not marked in the figure), which has the same structure as the detachable part between the guide cylinder 1 and the lifting cylinder 8, which will not be further introduced here.

[0052] In use, the operator places the noble metal to be smelted in the smelting cylinder 2, and then places the smelting cylinder 2 into the guide cylinder 1 in sequence, to complete the loading of the noble metal. After loading is completed, the guide cylinder 1 and the smelting cylinder 2 are driven to descend as a whole by the lifting cylinder 8, so that the smelting cylinder 2 enters the range of the induction coil 3 and stops in the range of the induction coil 3 in sequence to perform stepwise heating. During the smelting process, the noble metal gradually melts at high temperature and flows into the smelting cylinder 2 below or the final collecting cylinder 14 through the screen holes 5 on the partition plate 4.

[0053] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency and environmentally friendly precious metal smelting furnace, characterized in that, The device includes a smelting body and a moving mechanism. The smelting body includes a guiding connection mechanism, multiple smelting cylinders, and multiple induction coils. The multiple smelting cylinders are disposed on the guiding connection mechanism and can be sequentially and detachably connected along the axial direction. The multiple induction coils are coaxially wound around the outside of the multiple smelting cylinders, and the multiple induction coils form a moving channel along the axial direction. The multiple smelting cylinders can move with the guiding connection mechanism and pass through the moving channel one by one. The power of the multiple induction coils increases sequentially along the moving direction of the smelting cylinders. A partition is provided between adjacent smelting cylinders, the partition separating two adjacent smelting cylinders, and the partition is provided with sieve holes; The moving mechanism is connected to the guiding connection mechanism and is used to drive the guiding connection mechanism to move along the axial direction of the induction coil.

2. The high-efficiency and environmentally friendly precious metal smelting furnace according to claim 1, characterized in that, The guiding connection mechanism includes a guide cylinder, and a plurality of melting cylinders are coaxially arranged in the guide cylinder along the axial direction. Each melting cylinder can slide freely in the guide cylinder, and the moving mechanism is connected to the guide cylinder.

3. The high-efficiency and environmentally friendly precious metal smelting furnace according to claim 2, characterized in that, The side wall of the guide cylinder is provided with multiple windows at even intervals.

4. The high-efficiency and environmentally friendly precious metal smelting furnace according to claim 2, characterized in that, The guide cylinder is made of the same material as the melting cylinder, both of which have a melting point higher than that of precious metals.

5. The high-efficiency and environmentally friendly precious metal smelting furnace according to claim 2, characterized in that, The moving mechanism includes a frame and a lifting cylinder. The lifting cylinder is mounted on the frame, and its lifting end is connected to the guide cylinder to drive the guide cylinder to coaxially pass through the moving channel.

6. The high-efficiency and environmentally friendly precious metal smelting furnace according to claim 5, characterized in that, The partition is a frustum-shaped funnel structure, and the sieve holes are opened at the bottom of the frustum-shaped funnel structure. One end of any melting cylinder is an open structure, and the other end is connected to the frustum-shaped funnel structure. The protrusion of the frustum-shaped funnel structure is located outside the melting cylinder, and the frustum-shaped funnel structure on any melting cylinder can extend into the open structure of the adjacent melting cylinder.

7. The high-efficiency and environmentally friendly precious metal smelting furnace according to claim 6, characterized in that, A collecting cylinder is provided at one end of the guide cylinder away from the lifting cylinder. The smelting cylinder adjacent to the collecting cylinder is connected to the collecting cylinder, and the frustum-shaped funnel structure of the smelting cylinder extends into the collecting cylinder.

8. The high-efficiency and environmentally friendly precious metal smelting furnace according to claim 1, characterized in that, It includes a plurality of sieve holes, which are evenly spaced on the partition plate.

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