Device for jointly smelting magnesium by using vacuum magnesium smelting furnace and normal-pressure medium-frequency induction furnace

Abstract

The utility model provides a device for smelting magnesium by utilizing the combination of a vacuum magnesium smelting furnace and a normal-pressure medium-frequency induction furnace, which comprises a powder spraying system, the normal-pressure medium-frequency induction furnace, the vacuum magnesium smelting furnace and a siphon system for connecting the normal-pressure medium-frequency induction furnace and the vacuum magnesium smelting furnace, the spraying device is used for spraying calcined white powder and a slag former into a ferrosilicon molten pool in the vacuum magnesium smelting furnace; the normal-pressure medium-frequency induction furnace is used for heating blocky silicon iron to form a silicon iron solution; the siphon system is used for siphoning the silicon iron solution in the normal-pressure medium-frequency induction furnace into the vacuum magnesium smelting furnace; and the vacuum magnesium smelting furnace is used for carrying out reduction reaction by utilizing the silicon iron solution, the calcined white powder and the slag former to produce magnesium steam. By utilizing the magnesium smelting device, the problems that continuous production cannot be realized, the automation degree is low, the efficiency is low and the like in the traditional magnesium smelting scheme can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to smelting technical field more specifically, relate to a kind of device for magnesium smelting by vacuum magnesium smelting furnace and atmospheric medium-frequency induction furnace. BACKGROUND

[0002] China is a raw material, production capacity and magnesium export big country, China's raw magnesium production is about 89.36 million tons in 2022, about 90% of global production. Current magnesium smelting main method is Pidgeon method, single factory production scale is small and low efficiency, cannot realize mechanization and automation production, energy consumption is high, pollution is serious.

[0003] Pidgeon process is divided into three stages:

[0004] (1) dolomite calcination obtains calcined dolomite, calcined dolomite is pressed with silicon iron and fluorite powder;

[0005] (2) charge block is loaded into vacuum metal furnace tube, vacuum is extracted and heated reduction;

[0006] MgO·CaO (s) +Si (s) →Mg (g) +2CaO·SiO2 (s)

[0007] (3) magnesium vapor formed by reduction is cooled and crystallized into crude magnesium at the head of furnace tube, and then slag is refined to cast ingot.

[0008] Pidgeon method features: raw material resources are wide, can use various energy such as coal, oil and natural gas, process is simple, investment is less, and no toxic waste is produced, etc.;But the degree of automation is low, environmental pollution is heavy, tank body is large, thermal efficiency and production efficiency are low.

[0009] Magnesium smelting reaction is mainly through silicon iron to reduce calcined dolomite to obtain magnesium vapor, wherein silicon iron is used as reducing agent, and calcined dolomite (hereinafter referred to as calcined dolomite) is used as reduced material.

[0010] Vertical tank technology belongs to improved process of Pidgeon method, and its process conditions are same as Pidgeon method, and reduction tank is changed from horizontal tank to vertical tank, and rapid charging and slagging operation is realized by using self-gravity of material, and mechanization and automation are realized. But with the attempt of vertical tank technology, many new problems are exposed:

[0011] ① material and slag "stick tank" phenomenon is serious, and automatic slagging cannot be realized;

[0012] ② balling is easy to break during charging, and charging is uneven, which affects magnesium reduction rate;

[0013] ③ service life of reduction tank is shorter than that of horizontal tank, cost is higher than that of horizontal tank, and online replacement of tank body is difficult after tank body is damaged.

[0014] The way of supplementing the reducing agent silicon iron mentioned in the patent CN 111270088 A is to directly add silicon iron, and the actual consumption of the magnesium smelting reaction is the silicon element in the silicon iron. The original 75% silicon iron has a continuously decreasing silicon content, but the iron element still exists in the reaction container. Under the condition of limited reaction container volume, directly adding silicon iron cannot directly obtain 75% silicon iron, and it also increases the occupation of the effective reaction space in the reaction container, which requires frequent feeding and discharging, and cannot make the reaction efficient and convenient. Utility model content

[0015] In view of the above problems, the purpose of the utility model is to provide a device for smelting magnesium by combining a vacuum magnesium smelting furnace and an atmospheric medium-frequency induction furnace, so as to solve the problems of unable to realize continuous production, low degree of mechanization and automation, small scale and low efficiency in the traditional magnesium smelting scheme.

[0016] The utility model provides a device for smelting magnesium by combining a vacuum magnesium smelting furnace and an atmospheric medium-frequency induction furnace, comprising: a powder spraying system, an atmospheric medium-frequency induction furnace, a vacuum magnesium smelting furnace and a siphon system for connecting the atmospheric medium-frequency induction furnace and the vacuum magnesium smelting furnace, wherein,

[0017] The powder spraying system is used for spraying calcined lime powder and slagging agent into the silicon iron pool in the vacuum magnesium smelting furnace.

[0018] The atmospheric medium-frequency induction furnace is used for heating blocky silicon iron to form a silicon iron solution.

[0019] The siphon system is used for siphoning the silicon iron solution in the atmospheric medium-frequency induction furnace into the vacuum magnesium smelting furnace.

[0020] The vacuum magnesium smelting furnace is used for producing magnesium vapor by using the silicon iron solution, the calcined lime powder and the slagging agent for reduction reaction.

[0021] In addition, preferably, the siphon system comprises siphon pipelines connected with the atmospheric medium-frequency induction furnace and the vacuum magnesium smelting furnace respectively, wherein,

[0022] The siphon pipeline out-tap is arranged at the bottom of the atmospheric medium-frequency induction furnace, and the siphon pipeline in-tap is arranged at the middle part of the side wall of the vacuum magnesium smelting furnace,

[0023] One end of the siphon pipeline is connected with the siphon pipeline out-tap, and the other end of the siphon pipeline is connected with the siphon pipeline in-tap.

[0024] In addition, preferably, the siphon system further comprises a heating device arranged outside the periphery of the siphon pipeline, wherein,

[0025] The heating device is used for heat preservation and heating of the ferrosilicon liquid in the siphon pipe, so as to prevent the ferrosilicon liquid from condensing in the siphon pipe flow.

[0026] In addition, preferably, a first reaction crucible is arranged in the interior of the normal-pressure medium-frequency induction furnace, wherein,

[0027] A first induction heating coil is arranged on the outer side of the first reaction crucible, and is used for heating the first reaction crucible, so that the blocky ferrosilicon in the first reaction crucible forms a ferrosilicon melt.

[0028] In addition, preferably, a second reaction crucible is arranged in the interior of the vacuum magnesium smelting furnace, wherein,

[0029] A second induction heating coil is arranged on the outer side of the second reaction crucible, and is used for heating the second reaction crucible, so that the blocky ferrosilicon in the second reaction crucible forms a ferrosilicon melt, and provides heat for the reaction of the calcined powder and the ferrosilicon liquid to generate magnesium vapor.

[0030] In addition, preferably, a slag outlet is arranged on the side wall of the second reaction crucible, and the molten slag generated by the reduction reaction of the second reaction crucible is discharged into a slag ladle through the slag outlet.

[0031] In addition, preferably, a low-silicon ferro outlet is arranged at the bottom of the vacuum magnesium smelting furnace, and the low-silicon ferro generated by the reduction reaction of the second reaction crucible is discharged into a low-silicon ferro ladle through the low-silicon ferro outlet.

[0032] In addition, preferably, the powder spraying system comprises, in sequence, an inert gas storage device, two gas transmission pipelines, two powder spraying tanks, a powder spraying pipeline and a spray gun, wherein,

[0033] The two gas transmission pipelines comprise a first gas transmission pipeline and a second transmission pipeline, and the two powder spraying tanks comprise a calcined powder spraying tank for storing calcined powder and a slagging agent spraying tank for storing a slagging agent, the first gas transmission pipeline is in communication with the calcined powder spraying tank, and the second gas transmission pipeline is in communication with the slagging agent spraying tank;

[0034] The inert gas storage device is used for storing inert gas and taking the inert gas as a carrier for conveying and spraying powder;

[0035] The first gas transmission pipeline is used for conveying the inert gas into the calcined powder spraying tank;

[0036] The second gas transmission pipeline is used for conveying the inert gas into the slagging agent spraying tank;

[0037] The powder injection pipeline is used for conveying the calcined white powder and the slagging agent to the injection lance.

[0038] The injection lance is used for injecting the calcined white powder and the slagging agent into the molten pool of the vacuum magnesium smelting furnace.

[0039] In addition, preferably, a gas delivery valve is arranged on the inert gas storage device, and the flow of the inert gas is adjusted by the gas delivery valve.

[0040] In addition, preferably, a pressure gauge is arranged on each of the calcined white powder injection tank and the slagging agent injection tank, and the pressure of the inert gas in the calcined white powder injection tank and the slagging agent injection tank is detected by the corresponding pressure gauge.

[0041] From the above technical solutions, it can be seen that the device for jointly smelting magnesium by using a vacuum magnesium smelting furnace and a normal-pressure medium-frequency induction furnace provided by the present application smelts magnesium by using a double-furnace joint smelting method of the normal-pressure medium-frequency induction furnace and the vacuum magnesium smelting furnace.

[0042] To the accomplishment of the foregoing and related ends, one or more aspects of the application comprise the features hereinafter fully described and illustrated in the accompanying drawings. These and other aspects, features, and advantages of the application will become apparent to those of ordinary skill in the art from a review of the following description, taken in conjunction with the accompanying drawings. In the drawings that follow, like reference numerals will be used to indicate like components throughout the several views and / or drawings. BRIEF DESCRIPTION OF DRAWINGS

[0043] Other objects and advantages of the application will become apparent to those skilled in the art from a review of the ensuing detailed description, taken in conjunction with the appended claims, with reference to the following drawings in which:

[0044] Figure 1 FIG. 1 is a schematic diagram of a device for jointly smelting magnesium by using a vacuum magnesium smelting furnace and a normal-pressure medium-frequency induction furnace according to an embodiment of the present application.

[0045] In the drawings, reference numbers refer to the same or similar elements throughout.

[0046] 01, inert gas storage device, 02, first gas conveying pipeline, 03, second gas conveying pipeline, 04, calcined white powder spraying tank, 05, slagging agent spraying tank, 06, powder spraying pipeline, 07, spray gun, 08, vacuum magnesium smelting furnace, 09, splash-proof cover, 10, first reaction crucible, 11, normal pressure medium frequency induction furnace, 12, second reaction crucible, 13, siphon pipeline, 14, siphon pipeline tapping hole, 15, siphon pipeline tapping hole, 16, heating device, 17, low silicon iron discharge port, 18, low silicon iron tapping ladle, 19, slag ladle.

[0047] The same reference numbers in all the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0048] In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It is apparent, however, that the embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0049] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0051] In order to illustrate the structure of the device for smelting magnesium by combining a vacuum magnesium smelting furnace with a normal pressure medium frequency induction furnace provided by the present application, Figure 1 The structure of the device for smelting magnesium by combining a vacuum magnesium smelting furnace with a normal pressure medium frequency induction furnace according to the embodiments of the present application is shown.

[0052] As Figure 1The device for smelting magnesium by combining a vacuum magnesium smelting furnace and a normal-pressure medium-frequency induction furnace, as shown in the utility model, comprises: a powder spraying system, a normal-pressure medium-frequency induction furnace 11, a vacuum magnesium smelting furnace 8, a siphon system for connecting the normal-pressure medium-frequency induction furnace 11 and the vacuum magnesium smelting furnace 8, and a slag ladle 19 and a low-silicon iron ladle 18 connected with the vacuum magnesium smelting furnace 8, wherein the powder spraying system is used for spraying calcined gypsum powder and a slagging agent into a silicon-iron molten pool in the vacuum magnesium smelting furnace 8; the normal-pressure medium-frequency induction furnace 11 is used for heating blocky silicon iron to form a silicon-iron molten pool; the siphon system is used for siphoning silicon-iron solution in the normal-pressure medium-frequency induction furnace 11 into the vacuum magnesium smelting furnace 8; and the vacuum magnesium smelting furnace 8 is used for producing magnesium vapor by using silicon-iron liquid in the silicon-iron molten pool, the calcined gypsum powder and the slagging agent for reduction reaction; and the molten slag and the low-silicon iron generated by the reduction reaction in the vacuum magnesium smelting furnace 8 are respectively discharged into the slag ladle 19 and the low-silicon iron ladle 18.

[0053] In the embodiment of the utility model, silicon-iron liquid is used as a reducing agent in the vacuum magnesium smelting furnace 8 and is consumed continuously, and the silicon-iron liquid in the normal-pressure medium-frequency induction furnace 11 is continuously supplemented into the vacuum magnesium smelting furnace 8 through the siphon system, so that continuous production is achieved.

[0054] In the embodiment of the utility model, the siphon system comprises a siphon pipeline 13 connected with the normal-pressure medium-frequency induction furnace and the vacuum magnesium smelting furnace, wherein a siphon pipeline tapping hole 14 is arranged at the bottom of the normal-pressure medium-frequency induction furnace 11, a siphon pipeline tapping hole 15 is arranged at the middle part of the side wall of the vacuum magnesium smelting furnace, one end of the siphon pipeline 13 is connected with the siphon pipeline tapping hole 14, and the other end of the siphon pipeline 13 is connected with the siphon pipeline tapping hole 15.

[0055] The siphon system further comprises a heating device 16 arranged outside the periphery of the siphon pipeline, wherein the heating device 16 is used for heat preservation and heating of silicon-iron liquid in the siphon pipeline to prevent the silicon-iron liquid from condensing in the siphon pipeline.

[0056] In the embodiment of the utility model, a first reaction crucible 10 is arranged in the normal-pressure medium-frequency induction furnace 11, and a first induction heating coil is arranged on the outer side of the first reaction crucible 10, the first induction heating coil is used for heating the first reaction crucible 10, so that blocky silicon iron in the first reaction crucible 10 forms silicon-iron molten liquid.

[0057] The second reaction crucible 12 is provided with a second induction heating coil on the outer side of the second reaction crucible 12, and the second induction heating coil is used for heating the second reaction crucible 12, so that the bulk ferrosilicon in the second reaction crucible 12 forms ferrosilicon liquid, and heat is provided for the reaction of the calcined powder and the ferrosilicon liquid to generate magnesium vapor.

[0058] The second reaction crucible 12 is provided with a slag outlet on the side wall of the second reaction crucible 12, and the molten slag generated by the reduction reaction of the second reaction crucible 12 is discharged into the slag ladle 19 through the slag outlet. The bottom of the vacuum magnesium smelting furnace 8 is provided with a low ferrosilicon outlet, and the low ferrosilicon generated by the reduction reaction of the second reaction crucible 12 is discharged into the low ferrosilicon tapping ladle 18 through the low ferrosilicon outlet.

[0059] In the embodiment of the utility model, the powder spraying system includes inert gas storage device 1, two gas transmission pipelines, two powder spraying tanks, powder spraying pipeline 6 and spray gun 7 which are sequentially communicated, wherein the two gas transmission pipelines include first gas transmission pipeline 2 and second transmission pipeline 3, two powder spraying tanks include calcined powder powder spraying tank 4 for storing calcined powder, slagging agent powder spraying tank 5 for storing slagging agent, first gas transmission pipeline 2 is communicated with calcined powder powder spraying tank 4, second gas transmission pipeline 3 is communicated with slagging agent powder spraying tank 5, inert gas storage device 1 is used to store inert gas and make the inert gas as the carrier of conveying powder, first gas transmission pipeline 2 is used to convey inert gas to calcined powder powder spraying tank 4, second gas transmission pipeline 3 is used to convey inert gas to slagging agent powder spraying tank 5, powder spraying pipeline 6 is used to convey calcined powder and slagging agent to spray gun 7, and spray gun 7 is used to spray calcined powder and slagging agent into the molten pool of vacuum magnesium smelting furnace 8.

[0060] The inert gas storage device 1 is provided with a gas conveying valve, and the flow of the inert gas is adjusted through the gas conveying valve. The bottom of the calcined powder powder spraying tank 4 and the slagging agent powder spraying tank 5 is respectively provided with a powder outlet valve, and the communication of the calcined powder powder spraying tank 4, the slagging agent powder spraying tank 5 and the powder spraying pipeline 6 is controlled through the corresponding powder outlet valve.

[0061] The pressure gauges are arranged on the calcined lime powder spraying tank 4 and the slagging agent spraying tank 5 respectively, and the gas pressures of inert gases in the calcined lime powder spraying tank 4 and the slagging agent spraying tank 5 are detected through the corresponding pressure gauges.

[0062] In the embodiment of the utility model, the specific principle of the device for smelting magnesium by combining a vacuum magnesium smelting furnace with a normal-pressure medium-frequency induction furnace is as follows: the blocky high-silicon iron in the vacuum magnesium smelting furnace is heated, so that the blocky high-silicon iron in the vacuum magnesium smelting furnace is melted to form a silicon-iron molten pool;

[0063] The calcined lime powder and the slagging agent are sprayed into the silicon-iron molten pool in the vacuum magnesium smelting furnace through the powder spraying system, so that the calcined lime powder reacts with the silicon-iron liquid in the silicon-iron molten pool to produce magnesium vapor, and the magnesium vapor is extracted into a condenser;

[0064] When the silicon-iron liquid in the vacuum magnesium smelting furnace is consumed to a preset amount, the blocky high-silicon iron in the normal-pressure medium-frequency induction furnace is heated, so that the blocky high-silicon iron in the normal-pressure medium-frequency induction furnace is melted to form a silicon-iron molten pool;

[0065] The silicon-iron liquid in the normal-pressure medium-frequency induction furnace is siphoned into the vacuum magnesium smelting furnace through the siphon system until the silicon-iron liquid reaches a preset liquid level of the vacuum magnesium smelting furnace;

[0066] The calcined lime powder and the slagging agent are sprayed into the silicon-iron molten pool in the vacuum magnesium smelting furnace through the powder spraying system, so that the calcined lime powder reacts with the silicon-iron liquid in the silicon-iron molten pool to produce magnesium vapor, and the magnesium vapor is extracted into a condenser;

[0067] In the embodiment of the utility model, before the vacuum magnesium smelting furnace is heated, the power supply of the vacuum magnesium smelting furnace is turned on, a vacuum system connected with the vacuum magnesium smelting furnace is opened, the vacuum magnesium smelting furnace is vacuumized through the vacuum system, and the gas pressure in the vacuum magnesium smelting furnace reaches 200-1000 Pa.

[0068] During the heating of the vacuum magnesium smelting furnace, the second reaction crucible in the vacuum magnesium smelting furnace is slowly heated through the second induction heating coil; when the blocky high-silicon iron in the second reaction crucible is melted to form a silicon-iron molten pool, the heating power of the second induction heating coil is adjusted, so that the temperature of the silicon-iron molten pool in the vacuum magnesium smelting furnace is kept at 1450-1500 DEG C.

[0069] In the process of heating the blocky high-silicon iron in the normal-pressure medium-frequency induction furnace, the first reaction crucible in the normal-pressure medium-frequency induction furnace is slowly heated by a first induction heating coil; when the blocky high-silicon iron in the first reaction crucible is melted to form a ferrosilicon pool, the heating power of the first induction heating coil is adjusted so that the temperature of the ferrosilicon pool in the normal-pressure medium-frequency induction furnace is kept at 1350-1450 DEG C.

[0070] In the process of siphoning the ferrosilicon liquid in the normal-pressure medium-frequency induction furnace into the vacuum magnesium smelting furnace by the siphon system, the siphon pipe tapping hole valve of the normal-pressure medium-frequency induction furnace and the siphon pipe tapping hole valve of the vacuum magnesium smelting furnace are opened; under the action of the pressure difference, the ferrosilicon liquid in the normal-pressure medium-frequency induction furnace is siphoned into the ferrosilicon pool in the vacuum magnesium smelting furnace through the siphon pipe, wherein the ferrosilicon liquid in the siphon pipe is heated by a heating device to prevent the ferrosilicon liquid from condensing in the siphon pipe flow; when the liquid level of the ferrosilicon pool in the vacuum magnesium smelting furnace reaches a preset height, the siphon pipe tapping hole valve of the normal-pressure medium-frequency induction furnace and the siphon pipe tapping hole valve of the vacuum magnesium smelting furnace are closed.

[0071] In a specific embodiment of the utility model, when production starts, first, appropriate amount of blocky 75% ferrosilicon is placed in the normal-pressure medium-frequency induction furnace and the vacuum magnesium smelting furnace, and the siphon pipe tapping hole valve and the siphon pipe tapping hole valve are kept closed. The power supply of the vacuum magnesium smelting furnace is turned on, the vacuum system is opened, and when the vacuum is extracted to 200-1000 Pa, the heating power supply of the vacuum magnesium smelting furnace is turned on, the heating power is slowly increased, and after the blocky 75% ferrosilicon in the vacuum magnesium smelting furnace is completely melted to form a pool, the heating power is adjusted to keep the temperature at 1450-1500 DEG C. The inert gas storage device is turned on, the inert gas delivery valve is opened, the inert gas (argon) enters the calcined magnesia powder spraying tank and the slagging agent spraying tank through the gas delivery pipeline, when the calcined magnesia powder spraying tank and the slagging agent spraying tank are filled, the powder outlet valve at the bottom of the calcined magnesia powder spraying tank and the slagging agent spraying tank is opened, the argon is sprayed into the ferrosilicon pool in the second reaction crucible together with the calcined magnesia powder and the slagging agent, and the reaction of producing magnesium vapor by ferrosilicon reduction of calcined magnesia is started. And the produced magnesium vapor is extracted to the magnesium vapor condenser along with the vacuum system.

[0072] When the vacuum magnesium smelting furnace is vacuumized, the heating power supply of the normal-pressure medium-frequency induction furnace is turned on, the heating is started, the heating power is slowly increased, and after the ferrosilicon in the normal-pressure medium-frequency induction furnace is completely melted to form a pool, the power is adjusted to keep the temperature at about 1350-1450 DEG C.

[0073] When the silicon content in the vacuum magnesium smelting furnace is reduced to 25% or less, the powder spraying system is closed, the siphon pipe tapping hole valve and the siphon pipe tapping hole valve are opened, the silicon-iron liquid in the normal pressure medium frequency induction furnace is under the action of pressure difference, enters the vacuum magnesium smelting furnace through the siphon pipe, supplements the reducing agent of the magnesium smelting reaction, when the supplementing reaches a certain liquid level, the siphon pipe tapping hole valve and the siphon pipe tapping hole valve are closed, wherein, the siphon pipe outside the siphon pipe connection place has a heating device outside the siphon pipe, preventing the silicon-iron liquid from condensing during flowing; the powder spraying system is opened, the magnesium smelting reaction is continuously carried out, the magnesium vapor generated is pumped to the crystallizer to crystallize, the magnesium slag generated is continuously discharged into the slag ladle, and the cycle is repeated until the low-concentration silicon-iron liquid surface increases to the siphon pipe tapping hole, the powder spraying system is closed, and the low-concentration silicon-iron liquid is discharged into the tapping ladle, and a reaction cycle is completed.

[0074] The above is only optional embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the concept of the present application, and the contents of the present application specification and drawings are included in the patent protection range of the present application.

Claims

1. An apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace, characterized in that, include: The system includes a powder injection system, an atmospheric pressure medium-frequency induction furnace, a vacuum magnesium smelting furnace, and a siphon system for connecting the atmospheric pressure medium-frequency induction furnace and the vacuum magnesium smelting furnace. The powder injection system is used to inject calcined white powder and slag-forming agent into the ferrosilicon molten pool inside the vacuum magnesium smelting furnace; The atmospheric pressure medium frequency induction furnace is used to heat block ferrosilicon to form ferrosilicon solution; The siphon system is used to siphon the ferrosilicon solution in the atmospheric pressure medium frequency induction furnace into the vacuum magnesium smelting furnace; The vacuum magnesium smelting furnace is used to produce magnesium vapor by using the ferrosilicon solution, the calcined white powder, and the slag-forming agent for a reduction reaction.

2. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace as described in claim 1, characterized in that, The siphon system includes siphon pipes connected to the atmospheric pressure medium-frequency induction furnace and the vacuum magnesium smelting furnace, respectively. A siphon pipe iron outlet is provided at the bottom of the atmospheric pressure medium-frequency induction furnace, and a siphon pipe iron inlet is provided in the middle of the side wall of the vacuum magnesium smelting furnace. One end of the siphon pipe is connected to the iron outlet of the siphon pipe, and the other end of the siphon pipe is connected to the iron inlet of the siphon pipe.

3. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace according to claim 2, characterized in that, The siphon system also includes a heating device disposed on the outer periphery of the siphon pipe, wherein, The heating device is used to heat and maintain the temperature of the molten ferrosilicon in the siphon pipe to prevent the molten ferrosilicon from condensing during the flow in the siphon pipe.

4. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace as described in claim 1, characterized in that, A first reaction crucible is disposed inside the atmospheric pressure medium-frequency induction furnace, wherein, A first induction heating coil is provided on the outside of the first reaction crucible. The first induction heating coil is used to heat the first reaction crucible, so that the blocky ferrosilicon inside the first reaction crucible forms molten ferrosilicon.

5. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace according to claim 1, characterized in that, A second reaction crucible is provided inside the vacuum magnesium smelting furnace, wherein, A second induction heating coil is provided on the outside of the second reaction crucible. The second induction heating coil is used to heat the second reaction crucible, so that the blocky ferrosilicon in the second reaction crucible forms molten ferrosilicon, and at the same time provides heat for the reaction of calcined white powder and molten ferrosilicon to generate magnesium vapor.

6. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace according to claim 5, characterized in that, A slag outlet is provided on the side wall of the second reaction crucible, and the slag generated by the reduction reaction in the second reaction crucible is discharged into the slag bag through the slag outlet.

7. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace as described in claim 5, characterized in that, A low-silicon ferrophosphate outlet is provided at the bottom of the vacuum magnesium smelting furnace. The low-silicon ferrophosphate generated by the reduction reaction in the second reaction crucible is discharged into the low-silicon ferrophosphate tapping ladle through the low-silicon ferrophosphate outlet.

8. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace according to claim 1, characterized in that, The powder spraying system includes, in sequence, an inert gas storage device, two gas transmission pipelines, two powder spraying tanks, powder spraying pipes, and a spray gun. The two gas transmission pipelines include a first gas transmission pipeline and a second gas transmission pipeline. The two powder spraying tanks include a calcined white powder spraying tank for storing calcined white powder and a slag-forming agent spraying tank for storing slag-forming agent. The first gas transmission pipeline is connected to the calcined white powder spraying tank, and the second gas transmission pipeline is connected to the slag-forming agent spraying tank. The inert gas storage device is used to store inert gas and to use the inert gas as a carrier for conveying powder spraying. The first gas transmission pipeline is used to transport the inert gas to the calcined white powder spraying tank; The second gas transmission pipeline is used to transport the inert gas to the slag-forming agent powder spraying tank; The powder spraying pipe is used to transport the calcined white powder and the slag-forming agent to the spray gun; The spray gun is used to spray the calcined white powder and the slag-forming agent into the molten pool of the vacuum magnesium smelting furnace.

9. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace according to claim 8, characterized in that, A gas delivery valve is provided on the inert gas storage device, and the flow rate of the inert gas is adjusted by the gas delivery valve.

10. The apparatus for smelting magnesium using a vacuum magnesium smelting furnace and an atmospheric pressure medium-frequency induction furnace according to claim 8, characterized in that, Pressure gauges are installed on the calcined white powder spraying tank and the slag-forming agent spraying tank respectively, and the pressure of the inert gas inside the calcined white powder spraying tank and the slag-forming agent spraying tank is detected by the corresponding pressure gauges.

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