A smelting process for manganese iron ore

Abstract

The application discloses a smelting method for manganese iron ore, and belongs to the technical field of manganese iron ore smelting, and aims at solving the problem of low manganese iron ore melting yield caused by the complex structure and poor sealing of the bottom blowing component and the installation thereof in the prior art. In the method, the first bottom blowing component is inserted into the accommodating hole at the bottom of the induction heating furnace, so that the bottom blowing base body is tightly connected with the bottom of the induction heating furnace, and the bottom blowing air duct is communicated with the inner cavity of the induction heating furnace; the gas supply adapter is inserted into the gas connection adapter and tightly matched with the gas connection adapter; the gas inlet end of the gas supply pipe is connected with the gas supply unit and the reducing agent powder supply unit respectively; the manganese iron ore is added into the induction heating furnace, the induction heating furnace is started, and the manganese iron ore is subjected to induction heating; the gas supply unit and the reducing agent powder supply unit are started, and the reducing gas and the reducing agent enter the inner cavity of the heating furnace and are subjected to a reduction reaction with the manganese iron ore. The application can be used for manganese iron ore melting.

Description

Technical Field

[0001] This invention belongs to the field of manganese iron ore smelting technology, and particularly relates to a smelting method for manganese iron ore. Background Technology

[0002] Manganese ore is a manganese-iron oxide mineral, mainly containing iron and manganese elements, and is one of the raw materials for iron smelting. Gas-based smelting reduction is a commonly used method for smelting manganese ore. Manganese ore reacts with reducing gas and reducing agent, causing the oxides of manganese and iron to be reduced to metallic manganese and metallic iron, thus obtaining a manganese-iron alloy.

[0003] The reducing gas and reducing agent need to be injected into the melt from the bottom. The existing bottom blowing components have complex structures and installations and poor sealing, resulting in a low yield of manganese iron ore. Summary of the Invention

[0004] In view of the above analysis, the present invention aims to provide a melting and smelting method for manganese iron ore, in order to solve the problem that the low yield of manganese iron ore melting is caused by the complex structure and installation and poor sealing of the bottom blowing component in the prior art.

[0005] The objective of this invention is mainly achieved through the following technical solutions.

[0006] This invention provides a method for smelting and smelting manganese iron ore, comprising the following steps:

[0007] Step a: Provide an induction heating furnace, a first bottom blowing assembly, a second bottom blowing assembly, a gas supply unit, and a reducing agent powder supply unit. The first bottom blowing assembly includes a bottom blowing base and a gas receiving adapter. The bottom blowing base has a bottom blowing buffer chamber connected to the gas outlet end of the gas receiving adapter and multiple bottom blowing air channels connected to the gas outlet end of the bottom blowing buffer chamber. The second bottom blowing assembly includes a gas supply adapter and a gas supply pipe connected to the gas inlet end of the gas supply adapter.

[0008] Step b: Insert the first bottom blowing assembly into the receiving hole at the bottom of the induction heating furnace, so that the bottom blowing base is tightly connected to the bottom of the induction heating furnace, and the bottom blowing air passage is connected to the inner cavity of the induction heating furnace;

[0009] Step c: Insert the gas supply adapter into the gas connection adapter and ensure a tight fit.

[0010] Step d: Connect the inlet end of the gas supply pipe to the gas supply unit and the reducing agent powder supply unit respectively;

[0011] Step e: Add the manganese iron ore to the induction heating furnace, turn on the induction heating furnace, and induction heat the manganese iron ore;

[0012] Step f: Turn on the gas supply unit and the reducing agent powder supply unit. The reducing gas and reducing agent are injected into the inner cavity of the heating furnace through the gas supply pipe, gas supply adapter, gas receiving adapter, bottom blowing buffer chamber and bottom blowing gas channel in sequence to carry out a reduction reaction with manganese iron ore to obtain manganese iron alloy.

[0013] Further, step b includes the following steps:

[0014] Step b1: Install the support plate at the bottom of the induction heating furnace;

[0015] Step b2: Insert the first bottom blowing assembly into the receiving hole at the bottom of the induction heating furnace, so that the bottom blowing base is tightly connected to the bottom of the induction heating furnace, and the bottom blowing air passage is connected to the inner cavity of the induction heating furnace;

[0016] Step b3: The end of the support plate protrudes from the wall of the receiving hole, and the bottom-blown substrate is placed on the support plate.

[0017] Furthermore, the support plate is rotatably connected to the bottom of the induction heating furnace via a mounting rod.

[0018] Furthermore, the distance between the first end of the support plate and the mounting rod, the distance between the mounting rod and the wall of the receiving hole, and the distance between the second end of the support plate and the mounting rod decrease sequentially.

[0019] Furthermore, the support plate has an installation mode and a support mode;

[0020] During the process of inserting the first bottom blowing component into the receiving hole at the bottom of the induction heating furnace, the support plate is in the installation mode, with the first end of the support plate facing the receiving hole.

[0021] When the first bottom blowing component is inserted into the receiving hole at the bottom of the induction heating furnace, the support plate is in the support mode, with the second end of the support plate facing the receiving hole.

[0022] Furthermore, there are multiple support plates.

[0023] Furthermore, the support plates are evenly arranged circumferentially along the bottom of the induction heating furnace.

[0024] Furthermore, the induction heating furnace includes an outer furnace wall and an inner furnace shell disposed on the inner wall of the outer furnace wall and rotatably connected to the outer furnace wall.

[0025] Furthermore, step f is followed by the following steps:

[0026] Rotating the outer furnace wall causes a relative displacement between the outer furnace wall and the inner furnace shell. The outer hole at the bottom of the side wall of the outer furnace wall corresponds to the inner hole at the bottom of the side wall of the inner furnace shell. The outer hole and the inner hole form a discharge port for the molten manganese-iron alloy.

[0027] The ferromanganese alloy melt flows out from the discharge port, completing the discharge of the ferromanganese alloy melt.

[0028] Furthermore, the inner furnace shell is fixedly connected to the mounting surface.

[0029] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0030] A) The smelting and smelting method for manganese iron ore provided by the present invention divides the smelting and smelting system into five components (i.e., heating furnace, first bottom blowing component, second bottom blowing component, gas supply unit and reducing agent powder supply unit). The installation process of each component is simple and convenient to operate. The bottom blowing base and the heating furnace, as well as the gas supply adapter and the gas receiving adapter, are all easy-to-operate plug-in connections, thereby effectively simplifying the overall process of the smelting and smelting method for manganese iron ore and reducing the cost of smelting manganese iron ore.

[0031] B) The smelting and smelting method for manganese iron ore provided by the present invention can effectively improve the overall sealing of the smelting and smelting system and increase the smelting yield of manganese iron ore because the bottom blowing substrate and the heating furnace, as well as the gas supply adapter and the gas receiving adapter, are tightly fitted.

[0032] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0033] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0034] Figure 1 A flowchart of a smelting and smelting method for manganese iron ore provided in Embodiment 1 is provided for the present invention;

[0035] Figure 2 A schematic diagram of the smelting system in the smelting method for manganese iron ore provided in Embodiment 1 of the present invention is provided.

[0036] Figure 3 A schematic diagram of the anti-leakage component in the smelting method for manganese-iron ore provided in Embodiment 1 of the present invention is shown, with the arrow pointing in the direction of the flow of the manganese-iron alloy melt.

[0037] Figure 4 This invention provides a schematic diagram of the position of the mounting plate when the support plate is in the mounting mode in the smelting and smelting method for manganese iron ore provided in Embodiment 1;

[0038] Figure 5 This invention provides a schematic diagram of the position of the mounting plate when the support plate is in the support mode in the smelting and smelting method for manganese iron ore provided in Embodiment 1 of the present invention.

[0039] Figure label:

[0040] 1-Leakage prevention component; 101-First leak prevention plug; 102-First plug cylinder; 103-Second plug cylinder; 104-Inner hole; 105-Outer hole; 2-Drainage ring; 3-Outer furnace wall; 4-Inner furnace shell; 5-Induction coil; 6-Bottom blowing base; 7-Bottom blowing air passage; 8-Bottom blowing buffer chamber; 9-Gas connection adapter; 10-Support plate; 11-Mounting rod; 12-Gas supply adapter; 13-Gas supply pipe. Detailed Implementation

[0041] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0042] Example 1

[0043] This embodiment provides a method for smelting and smelting manganese iron ore, see [link to relevant documentation]. Figure 1 It includes the following steps:

[0044] Step a: Provide an induction heating furnace, a first bottom blowing assembly, a second bottom blowing assembly, a gas supply unit, and a reducing agent powder supply unit. The first bottom blowing assembly includes a bottom blowing base 6 and a gas receiving adapter 9. The bottom blowing base 6 has a bottom blowing buffer chamber 8 connected to the gas outlet of the gas receiving adapter 9 and multiple bottom blowing air channels 7 connected to the gas outlet of the bottom blowing buffer chamber 8. The second bottom blowing assembly includes a gas supply adapter 12 and a gas supply pipe 13 connected to the gas inlet of the gas supply adapter 12.

[0045] Step b: Insert the first bottom blowing assembly into the receiving hole at the bottom of the induction heating furnace, so that the bottom blowing base 6 is tightly connected to the bottom of the induction heating furnace, and the bottom blowing air passage 7 is connected to the inner cavity of the induction heating furnace.

[0046] Step c: Insert the gas supply adapter 12 into the gas connection adapter 9 and ensure a tight fit between them;

[0047] Step d: Connect the air inlet end of the air supply pipe 13 to the air supply unit and the reducing agent powder supply unit respectively;

[0048] Step e: Add the manganese iron ore to the induction heating furnace, turn on the induction heating furnace, and induction heat the manganese iron ore;

[0049] Step f: Turn on the gas supply unit and the reducing agent powder supply unit. The reducing gas (e.g., hydrogen) and the reducing agent are injected into the inner cavity of the heating furnace through the gas supply pipe 13, the gas supply adapter 12, the gas receiving adapter 9, the bottom blowing buffer chamber 8 and the bottom blowing gas channel 7 in sequence, and react with the manganese iron ore to obtain manganese iron alloy.

[0050] Compared with the prior art, the smelting and smelting method for manganese iron ore provided in this embodiment divides the smelting and smelting system into five components (i.e., heating furnace, first bottom blowing component, second bottom blowing component, gas supply unit, and reducing agent powder supply unit). The installation process of each component is simple and easy to operate. The bottom blowing base 6 and the heating furnace, as well as the gas supply adapter 12 and the gas receiving adapter 9, are easy to connect by plugging in, thereby effectively simplifying the overall process of the smelting and smelting method for manganese iron ore and reducing the cost of smelting manganese iron ore.

[0051] In addition, since the bottom-blown substrate 6 and the heating furnace, as well as the gas supply adapter 12 and the gas receiving adapter 9 are tightly fitted, the overall sealing of the smelting system can be effectively improved, thereby increasing the molten iron manganese ore yield.

[0052] In order to achieve the injection and regulation of multiple gases, the above-mentioned gas supply unit includes an inert gas supply unit (e.g., nitrogen or argon), a hydrogen supply unit, and an oxygen supply unit. By adjusting the opening and closing of the above four units, various injection parameters and the contact area with the melt can be adjusted. By adjusting the setting position and diameter of the bottom blowing channel 7, the injection position and effective gas quantity can be adjusted, which is more conducive to adapting to different manganese iron ore gas-based melting reactions.

[0053] For the installation of the first bottom-blowing component, step b above, exemplarily, includes the following steps:

[0054] Step b1: Install the support plate 10 at the bottom of the induction heating furnace;

[0055] Step b2: Insert the first bottom blowing assembly into the receiving hole at the bottom of the induction heating furnace, so that the bottom blowing base 6 is tightly connected to the bottom of the induction heating furnace, and the bottom blowing air passage 7 is connected to the inner cavity of the induction heating furnace.

[0056] Step b3: The end of the support plate 10 protrudes from the wall of the receiving hole, and the bottom blowing substrate 6 is placed on the support plate 10.

[0057] In this way, by setting the support plate 10, the downward vertical displacement of the bottom blowing base 6 can be limited, thereby achieving support for the bottom blowing base 6.

[0058] For example, the support plate 10 is rotatably connected to the bottom of the induction heating furnace via the mounting rod 11.

[0059] To avoid interference between the first bottom-blowing assembly and the support plate 10 during insertion into the receiving hole at the bottom of the induction heating furnace, the distances between the first end of the support plate 10 and the mounting rod 11, the distances between the mounting rod 11 and the wall of the receiving hole, and the distances between the second end of the support plate and the mounting rod 11 decrease sequentially. The support plate 10 has an installation mode and a support mode. During the insertion of the first bottom-blowing assembly into the receiving hole at the bottom of the induction heating furnace, the support plate 10 is in the installation mode. See [link to relevant documentation]. Figure 4 The first end of the support plate 10 faces the receiving hole. When the first bottom blowing assembly is inserted into the receiving hole at the bottom of the induction heating furnace, the support plate 10 is in the support mode. (See attached image) Figure 5 The second end of the support plate 10 faces the receiving hole.

[0060] In this way, by rotating the support plate 10 relative to the bottom of the induction heating furnace, the support plate 10 can protrude or not protrude from the wall of the receiving hole, thereby realizing the insertion and support of the first bottom blowing assembly.

[0061] For example, there are multiple support plates 10, such as four, and the multiple support plates 10 are evenly arranged circumferentially along the bottom of the induction heating furnace.

[0062] Considering that the bottom of the aforementioned induction heating furnace is equipped with a gas inlet adapter 9 and a gas supply adapter 12 for installation and connection, and that the two are tightly fitted and cannot rotate relative to each other, using the existing method of discharging molten manganese-iron alloy (i.e., tilting) would cause the gas inlet adapter 9 and the gas supply adapter 12 to loosen, affecting the overall sealing of the smelting system. Therefore, based on the structure of the induction heating furnace, including an outer furnace wall 3, an inner furnace shell 4 located on the inner wall of the outer furnace wall 3 and rotatably connected to the outer furnace wall 3, and an induction coil 5 located between the outer furnace wall 3 and the inner furnace shell 4, the following steps are included after step f:

[0063] Rotate the outer furnace wall 3 so that the outer furnace wall 3 is relatively displaced relative to the inner furnace shell 4. The position of the outer hole 105 opened at the bottom of the side wall of the outer furnace wall 3 corresponds to the position of the inner hole 104 opened at the bottom of the side wall of the inner furnace shell 4. The outer hole 105 and the inner hole 104 form the discharge port of the ferromanganese alloy melt.

[0064] The ferromanganese alloy melt flows out from the discharge port, completing the discharge of the ferromanganese alloy melt.

[0065] It should be noted that the inner furnace shell 4 is fixedly connected to the mounting surface (e.g., the ground) and mainly serves as a chamber for melting manganese iron ore. It has a bottom wall and side walls. The outer furnace wall 3 is a rotating part, mainly set for drainage, and only has a side wall. The bottom of the side wall of the inner furnace shell 4 has an inner hole 104, and the bottom of the side wall of the outer furnace wall 3 has an outer hole 105.

[0066] When the induction heating furnace melts manganese iron ore, the inner hole 104 and the outer hole 105 are staggered and not connected, and the inner cavity of the induction heating furnace is a closed chamber. When the induction heating furnace discharges the manganese iron alloy melt, the inner hole 104 and the outer hole 105 are connected to form a discharge port, and the manganese iron alloy melt is discharged from the induction heating furnace through the discharge port, realizing the bottom discharge of the manganese iron alloy melt.

[0067] In this way, on the one hand, during the discharge process of the ferromanganese alloy melt, only the outer furnace wall 3 needs to be rotated to connect the inner hole 104 and the outer hole 105, without involving the rotation of the inner furnace shell 4, thereby ensuring the stability of the connection between the gas connection adapter 9 and the gas supply adapter 12; on the other hand, by adopting the bottom discharge method, the disturbance of the ferromanganese alloy melt is reduced during the discharge process, the ferromanganese alloy melt is in a more stable state, the ferromanganese alloy melt and the slag will not mix, and the ferromanganese alloy melt is discharged from the drain port first, while the slag is always on the surface of the ferromanganese alloy melt, thereby ensuring the purity and quality of the ferromanganese alloy melt.

[0068] For example, the above-described smelting method for manganese iron ore employs a smelting system with the following structure, see [link to relevant documentation]. Figure 2 The system includes an induction heating furnace, a bottom-blowing base 6, a gas inlet adapter 9, a gas supply adapter 12, a gas supply pipe 13, a gas supply unit, and a reducing agent powder supply unit. The bottom-blowing base 6 has a bottom-blowing buffer chamber 8 and multiple bottom-blowing air channels 7. The gas supply unit is connected to the inlet end of the gas supply pipe 13, and the outlet end of the gas supply pipe 13 is connected to the inlet end of the gas supply adapter 12. The gas supply adapter 12 is inserted into the gas inlet adapter 9 and fits tightly with it. The outlet end of the gas inlet adapter 9 is connected to the inlet end of the bottom-blowing buffer chamber 8. The outlet end of the bottom-blowing buffer chamber 8 covers the inlet ends of multiple bottom-blowing air channels 7. The bottom-blowing base 6 is inserted into the bottom of the induction heating furnace. The bottom-blowing base 6 is detachably connected to the induction heating furnace and fits tightly. The outlet end of the bottom-blowing air channel 7 communicates with the inner cavity of the induction heating furnace.

[0069] For example, the gas supply adapter 12 is an elastic element and the gas receiving adapter 9 is a rigid element. The outer wall dimension of the gas supply adapter 12 is greater than or equal to the inner wall dimension of the gas receiving adapter 9. During the connection process between the gas supply adapter 12 and the gas receiving adapter 9, the gas supply adapter 12 is squeezed by the gas receiving adapter 9 to achieve a tight fit and squeeze-sealed connection between the two.

[0070] In order to further improve the sealing between the gas supply adapter 12 and the gas receiving adapter 9 and facilitate their connection, the outer diameter of the gas supply adapter 12 and the inner diameter of the gas receiving adapter 9 gradually decrease along the direction that gradually approaches the induction heating furnace. With this shape of gas supply adapter 12 and gas receiving adapter 9, the outer diameter of the upper end of the gas supply adapter 12 is smaller and the inner diameter of the lower end of the gas receiving adapter 9 is larger, so that it is easier to plug in the gas supply adapter 12 and the gas receiving adapter 9.

[0071] Considering the uniformity of the spraying, the inner diameter of the bottom-blowing buffer chamber 8 gradually increases from the air inlet to the air outlet. This allows the speed of the spraying gas entering the bottom-blowing buffer chamber 8 to be appropriately reduced, achieving a certain degree of buffering and thus improving the uniformity of the spraying.

[0072] In order to limit the upward vertical displacement of the bottom-blown substrate 6, the bottom-blown substrate 6 includes a first substrate and a second substrate connected sequentially from top to bottom. The first substrate and the second substrate are integrally formed. The outer diameter of the first substrate is larger than the outer diameter of the second substrate, thereby forming a stepped outer wall surface. A receiving hole for accommodating the bottom-blown substrate 6 is opened on the induction heating furnace. The hole wall is conformal to the outer wall of the bottom-blown substrate 6. Through the stepped hole wall, not only can the upward vertical displacement of the bottom-blown substrate 6 be limited, but also a multi-section sealing structure can be formed, further improving the sealing performance of the smelting system.

[0073] In order to reduce leakage of molten manganese-iron alloy during the melting process, the aforementioned induction heating furnace also includes a leak-proof component 1. The structure of the leak-proof component 1 is detailed in [link to relevant documentation]. Figure 3It includes a first leak-proof plug 101 and a second leak-proof plug sleeved on the outer wall of the first leak-proof plug 101. The second leak-proof plug includes a first plug cylinder 102 and a second plug cylinder 103 connected in sequence along a direction gradually away from the axis of the induction heating furnace. The diameter of the inner hole 104 is greater than or equal to the outer diameter of the first plug cylinder 102, the diameter of the outer hole 105 is greater than or equal to the outer diameter of the second plug cylinder 103, the inner diameter of the second plug cylinder 103 is greater than or equal to the outer diameter of the first leak-proof plug 101, so that the hole wall of the outer hole 105 protrudes from the hole wall of the inner hole 104, the inner wall of the drain port is stepped, and the outer wall of the second leak-proof plug is stepped. When the manganese iron ore is melted, the second leak-proof plug is located in the inner hole 104, and the first leak-proof plug 101 is located in the second leak-proof plug. The second leak-proof plug and the first leak-proof plug 101 seal the inner hole 104. At the same time, due to the setting of the outer furnace wall 3, the second leak-proof plug and the first leak-proof plug 101 can be effectively supported to resist the pressure of the manganese iron alloy melt on them. Moreover, the two are cylindrical in shape and have sufficient mechanical strength, so as to effectively prevent them from deforming and ensure the tightness of the seal. When the ferromanganese alloy melt is discharged, the outer furnace wall 3 is rotated, causing it to rotate relative to the inner furnace shell 4. The outer hole 105 and the inner hole 104 are aligned (i.e., their axes coincide). Under the pressure of the ferromanganese alloy melt in the induction heating furnace, the second anti-leakage plug and the first anti-leakage plug 101 move toward the outer hole 105. When the stepped surface of the second anti-leakage plug moves to the stepped surface of the inner wall of the drain port, the hole wall of the outer hole 105 will interfere with the second anti-leakage plug. The second anti-leakage plug stops moving, and the gap between the outer furnace wall 3 and the inner furnace shell 4 is sealed. The first anti-leakage plug 101 continues to move and disengages from the second anti-leakage plug, so that the inner hole 104, the second anti-leakage plug and the outer hole 105 are connected to form the drain port of the ferromanganese alloy melt.

[0074] During the aforementioned draining process, since the first anti-leakage plug 101 will detach from the second anti-leakage plug, to prevent it from falling into the drained ferromanganese alloy melt, the induction heating furnace also includes a drain ring 2. The drain ring 2 is located at the end of the outer hole 105 away from the inner hole 104. The first anti-leakage plug 101 is T-shaped. When the induction heating furnace drains the ferromanganese alloy melt, the thickness of the protruding portion of the first anti-leakage plug 101 is less than the distance between the second plug cylinder 103 and the drain ring 2. Exemplarily, the drain ring 2 includes an outer ring, an inner ring located in the region within the outer ring, and multiple connecting ribs connecting the inner ring and the outer ring. A portion of the inner ring, a portion of the outer ring, and two adjacent connecting ribs form a drain hole.

[0075] Thus, when the first leak-proof plug 101 continues to move to the drain ring 2, the protruding part of the first leak-proof plug 101 will interfere with the drain ring 2, and the first leak-proof plug 101 will stop moving. The inner hole 104, the second leak-proof plug, the gap between the second leak-proof plug and the first leak-proof plug 101, the gap between the first leak-proof plug 101 and the outer hole 105, and the drain ring 2 will sequentially connect to form a drain port for the ferromanganese alloy melt. With the above structure, the drain ring 2 axially limits the first leak-proof plug 101, which can prevent the first leak-proof plug 101 from falling into the drained ferromanganese alloy melt while achieving the draining of the ferromanganese alloy melt. It should be noted that after the ferromanganese alloy melt is drained and before the non-metallic melt flows out, the first leak-proof plug 101 and the second leak-proof plug are pushed into the inner hole 104. Then, the outer furnace wall 3 is rotated to make the inner hole 104 and the outer hole 105 misaligned, thus completing the reset of the leak-proof component 1.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A smelting process for ferromanganese ore, characterized in that, Includes the following steps: Step a: Provide an induction heating furnace, a first bottom blowing assembly, a second bottom blowing assembly, a gas supply unit, and a reducing agent powder supply unit. The first bottom blowing assembly includes a bottom blowing base and a gas receiving adapter. The bottom blowing base has a bottom blowing buffer chamber connected to the gas outlet end of the gas receiving adapter and multiple bottom blowing air channels connected to the gas outlet end of the bottom blowing buffer chamber. The second bottom blowing assembly includes a gas supply adapter and a gas supply pipe connected to the gas inlet end of the gas supply adapter. Step b: Insert the first bottom blowing assembly into the receiving hole at the bottom of the induction heating furnace, so that the bottom blowing base is tightly connected to the bottom of the induction heating furnace, and the bottom blowing air channel is connected to the inner cavity of the induction heating furnace; Step c: Insert the gas supply adapter into the gas connection adapter and ensure a tight fit. Step d: Connect the inlet end of the gas supply pipe to the gas supply unit and the reducing agent powder supply unit respectively; Step e: Add the manganese iron ore to the induction heating furnace, turn on the induction heating furnace, and induction heat the manganese iron ore; Step f: Turn on the gas supply unit and the reducing agent powder supply unit. The reducing gas and reducing agent are injected into the inner cavity of the heating furnace through the gas supply pipe, gas supply adapter, gas receiving adapter, bottom blowing buffer chamber and bottom blowing gas channel in sequence to carry out a reduction reaction with manganese iron ore to obtain manganese iron alloy.

2. The smelting process for ferromanganese ore as claimed in claim 1 wherein, Step b includes the following steps: Step b1: Install the support plate at the bottom of the induction heating furnace; Step b2: Insert the first bottom blowing assembly into the receiving hole at the bottom of the induction heating furnace, so that the bottom blowing base is tightly connected to the bottom of the induction heating furnace, and the bottom blowing air channel is connected to the inner cavity of the induction heating furnace; Step b3: The end of the support plate protrudes from the wall of the receiving hole, and the bottom blowing substrate is placed on the support plate.

3. The smelting and smelting method for manganese iron ore according to claim 2, characterized in that, The support plate is rotatably connected to the bottom of the induction heating furnace via a mounting rod.

4. The smelting and smelting method for manganese iron ore according to claim 3, characterized in that, The distance between the first end of the support plate and the mounting rod, the distance between the mounting rod and the wall of the receiving hole, and the distance between the second end of the support plate and the mounting rod decrease sequentially.

5. The method for smelting and smelting manganese iron ore according to claim 4, characterized in that, The support plate has an installation mode and a support mode; During the process of inserting the first bottom blowing assembly into the receiving hole at the bottom of the induction heating furnace, the support plate is in the installation mode, with the first end of the support plate facing the receiving hole; When the first bottom blowing assembly is inserted into the receiving hole at the bottom of the induction heating furnace, the support plate is in the support mode, and the second end of the support plate faces the receiving hole.

6. The smelting and smelting method for manganese iron ore according to claim 3, characterized in that, The number of support plates is multiple.

7. The method for smelting and smelting manganese iron ore according to claim 6, characterized in that, The support plates are evenly arranged circumferentially along the bottom of the induction heating furnace.

8. The method for smelting and smelting manganese iron ore according to any one of claims 1 to 7, characterized in that, The induction heating furnace includes an outer furnace wall and an inner furnace shell disposed on the inner wall of the outer furnace wall and rotatably connected to the outer furnace wall.

9. The method for smelting and smelting manganese iron ore according to claim 8, characterized in that, Following step f, the following steps are also included: Rotating the outer furnace wall causes a relative displacement between the outer furnace wall and the inner furnace shell. The outer hole at the bottom of the side wall of the outer furnace wall corresponds to the inner hole at the bottom of the side wall of the inner furnace shell. The outer hole and the inner hole form a discharge port for the molten manganese-iron alloy. The ferromanganese alloy melt flows out from the discharge port, completing the discharge of the ferromanganese alloy melt.

10. The method for smelting and smelting manganese iron ore according to claim 8, characterized in that, The inner furnace shell is fixedly connected to the mounting surface.

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