Efficient and energy-saving ferrotitanium alloy smelting device and using method thereof

Abstract

The invention discloses an efficient and energy-saving ferrotitanium alloy smelting device and a using method thereof. The efficient and energy-saving ferrotitanium alloy smelting device comprises a furnace body; the vertical partition plate divides the space in the furnace body into at least two fan-shaped areas; the two flat coils are vertically arranged outside the furnace body and correspond to the two fan-shaped areas; the cover plate is positioned at the top of the furnace body; the driving mechanism is in transmission connection with the top of the vertical partition plate so as to drive the vertical partition plate to rotate; the feeding hole is formed in the cover plate; the discharging opening is formed in the bottom of the furnace body and located in a fan-shaped area. The ferrotitanium smelting furnace has the beneficial effects that ferrotitanium in the furnace body is divided into several sectors to be subjected to segmented heating treatment through cooperation of the flat coil and the sector space, a spiral coil is replaced by the flat coil, the number of turns of the coil is greatly reduced, a magnetic field can be accurately concentrated in the sectors of ferrotitanium to be smelted, energy consumption is reduced, and smelting time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of ferro-titanium alloys, and in particular to a ferro-titanium alloy melting device and a method for using the same. Background Art

[0002] Ferro-titanium is an intermediate alloy of titanium and iron, which is used as a deoxidizer, degasser and carbon-sulfur stabilizer in steel smelting. Ferro-titanium plays a key role in the production of steel. Through the titanium element it contains, it can effectively purify molten steel and improve the quality and performance of steel. When melting ferro-titanium alloy, a vacuum arc furnace is generally used. In a controlled vacuum environment, ilmenite is heated by an electric arc, instantaneously melted to form liquid metal, and the molten metal is cooled to a solid state to form sponge titanium. However, the melting point of ferro-titanium alloy is relatively high, about 1500°C - 1600°C, and the use of a vacuum arc furnace often consumes a high amount of energy.

[0003] For example, Chinese Patent Publication No. CN117346539A discloses an intelligent furnace building method for an intermediate frequency induction furnace for ferro-titanium melting, which mentions using an intermediate frequency induction furnace to melt ferro-titanium. However, due to the high melting point of ferro-titanium alloy, using an intermediate frequency induction furnace results in relatively large melt turbulence, high heat loss, and a long melting time.

[0004] Another example is Chinese Utility Model Patent Publication No. CN207317628U, which discloses an energy-efficient intermediate frequency induction furnace, including a furnace body. There is a furnace chamber inside the furnace body, and an induction coil is spirally wound outside the furnace chamber. There is also a cooling water tank outside the furnace body. One end of the induction coil is connected to the water outlet of the cooling water tank through a water inlet pipeline, and the other end is connected to the water inlet of the cooling water tank through a water return pipeline. The induction coil of this patent is spiral. The disadvantage of the spiral induction coil is that the strongest magnetic field is at the central axis of the spiral, and it is impossible to achieve uniform heating of the ferro-titanium alloy. Moreover, once powered on, an overall magnetic field will be formed outside the furnace body, and the excessive number of turns of the induction side coil increases energy consumption and causes waste of energy.

[0005] Another example is Chinese Utility Model Patent Publication No. CN222418507U, which discloses a high-efficiency heating intermediate frequency induction furnace, including a furnace shell and a furnace body. The furnace body includes a crucible, and an induction side coil and an induction bottom coil are arranged up and down inside the pot body of the crucible. The induction side coil includes two induction coils arranged at intervals up and down, and each induction coil is arranged in a cylindrical shape. The induction bottom coil is arranged inside the bottom wall of the crucible. This patent adopts a segmented induction coil design, which improves the heating efficiency and heating uniformity of the induction furnace. However, the induction side coil and the induction bottom coil in this patent are still spiral structures, and the overall energy consumption for heating the ferro-titanium alloy during power-on is relatively high, and the problem of non-uniform heating still cannot be solved. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing ferrotitanium alloy smelting method has high energy consumption, and for this purpose, a high-efficiency and energy-saving ferrotitanium alloy smelting device and a use method thereof are provided.

[0007] The technical solution of the present invention is: a high-efficiency and energy-saving titanium-iron alloy smelting device, comprising: a furnace body; a vertical partition, the vertical partition divides the space inside the furnace body into at least two fan-shaped areas; at least two flat coils, the two flat coils are vertically arranged outside the furnace body and correspond to the two fan-shaped areas; a cover plate, the cover plate is located at the top of the furnace body; a driving mechanism, the driving mechanism is transmission-connected to the top of the vertical partition to drive the vertical partition to rotate; a feed port, the feed port is opened on the cover plate; and a discharge port is opened at the bottom of the furnace body and is located in a fan-shaped area.

[0008] The vertical partition described in the above solution divides the space in the furnace body into two fan-shaped areas.

[0009] The vertical partitions in the above solution include a first vertical partition, a second vertical partition and a third vertical partition extending outward from the center of the furnace body.

[0010] The driving mechanism in the above solution is a motor.

[0011] In the above solution, the flat coil is fixedly connected to the outer wall of the furnace body through an insulating member.

[0012] An improvement of the above scheme is that the inner wall of the furnace body is provided with a magnesium oxide or calcium oxide based lining.

[0013] The method for using the high-efficiency and energy-saving titanium-iron alloy smelting device comprises the following steps: placing the titanium-iron alloy to be smelted into a fan-shaped space in a furnace body through a feed port, starting a driving mechanism after a certain amount of titanium-iron alloy is loaded in the fan-shaped space, driving a partition to rotate, and then placing the smelted titanium-iron alloy into another fan-shaped space in the furnace body through the feed port, until each fan-shaped space is filled with the titanium-iron alloy to be smelted, starting a flat coil through an external power supply, heating the titanium-iron alloy in the fan-shaped space facing the flat coil to 650°C-700°C, starting the driving mechanism to rotate the vertical partition so that the titanium-iron alloy in the fan-shaped space faces another flat coil, driving another flat coil through an external power supply, heating the titanium-iron alloy in the fan-shaped space to 1500°C-1600°C, and discharging the molten titanium-iron alloy from a discharge port, and thus melting the titanium-iron alloy in the remaining fan-shaped spaces and discharging them from the discharge port.

[0014] The beneficial effect of the present invention is that the titanium-iron alloy in the furnace body is divided into several sectors for segmented heating treatment through the cooperation of the flat coil and the sector-shaped space. The flat coil replaces the spiral coil, which greatly reduces the number of coil turns. The magnetic field can be accurately concentrated in the sector of the titanium-iron to be smelted, reducing energy consumption and shortening the smelting time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cooperation between the furnace body and the flat coil of the present invention; Figure 2 is a schematic diagram of a cover plate of the present invention; Figure 3 is a schematic diagram of a vertical partition in one embodiment of the present invention; Figure 4 is a schematic diagram of a vertical partition according to a preferred embodiment of the present invention; Figure 5 It is a schematic diagram of the coordination of the vertical partition and the furnace body of a preferred example of the present invention; In the figure, 1, furnace body, 2, vertical partition, 21, first vertical partition, 22, second vertical partition, 23, third vertical partition, 3, flat coil, 4, cover plate, 5, driving mechanism, 6, feed port, 7, discharge port, 8, insulating member. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0017] like Figures 1-3 As shown, the high-efficiency and energy-saving titanium-iron alloy smelting device comprises: a furnace body 1; a vertical partition 2, which divides the space inside the furnace body into at least two fan-shaped areas; at least two flat coils 3, which are vertically arranged outside the furnace body and correspond to the two fan-shaped areas; a cover plate 4, which is located on the top of the furnace body; a driving mechanism 5, which is connected to the top of the vertical partition to drive the vertical partition to rotate; a feed port 6, which is opened on the cover plate; and a discharge port 7, which is opened at the bottom of the furnace body and is located in a fan-shaped area. A high-temperature resistant valve is installed in the discharge port, and when discharge is required, the valve can be opened.

[0018] As an embodiment of the present invention, a vertical partition divides the space inside the furnace body into two fan-shaped regions. There are two flat coils, which are respectively located outside the furnace body opposite to the corresponding two fan-shaped regions. The innovation of the present invention is to change the traditional spiral induction coil into a flat coil. The magnetic field distribution characteristic of the flat coil is that the magnetic field is the strongest near the coil surface and decays rapidly away from the coil. Utilizing this characteristic, the inside of the furnace body is divided into two fan-shaped regions, which are respectively matched with the two flat coils. The two flat coils are respectively connected to independent power supplies. One flat coil is used to preheat the ferrotitanium alloy, heating it from 50°C / min to 80°C / min to 650°C - 700°C and keeping it warm for 20 min - 30 min. The other flat coil is used for main heating, with a power-on power of 100 - 400 kW and a frequency of 150 Hz - 600 Hz, rapidly heating it to the melting point of ferrotitanium, which is 1500°C - 1600°C.

[0019] The usage method of the high-efficiency energy-saving ferrotitanium alloy melting device includes the following steps: Put the ferrotitanium alloy to be melted into the first and second fan-shaped spaces inside the furnace body through the feeding port. The discharging port is located in the second fan-shaped space. Start the first flat coil through an external power supply to heat the ferrotitanium alloy in the first fan-shaped space facing this flat coil to 650°C - 700°C. Start the driving mechanism to rotate the vertical partition so that the preheated ferrotitanium alloy in the first fan-shaped space and the non-preheated ferrotitanium alloy in the second fan-shaped space exchange positions. The preheated ferrotitanium alloy faces the other flat coil. Drive the second flat coil through an external power supply to heat the ferrotitanium alloy in this fan-shaped space to 1500°C - 1600°C. The melted ferrotitanium alloy is discharged from the discharging port. At this time, the non-preheated ferrotitanium alloy faces the first flat coil. The first flat coil heats it to 650°C - 700°C. Start the driving mechanism to rotate the vertical partition so that this ferrotitanium alloy returns to the second fan-shaped space again. Start the second flat coil to heat the ferrotitanium alloy in this fan-shaped space to 1500°C - 1600°C. The melted ferrotitanium alloy is discharged from the discharging port.

[0020] The driving mechanism can be a motor. The transmission shaft of the motor is drivingly connected to the top center of the vertical partition. The vertical partition is made of heat-resistant material, such as graphite or other high-temperature-resistant non-metallic materials.

[0021] The flat coil is fixedly connected to the outer wall of the furnace body through an insulating member 8. The insulating member is a bakelite column.

[0022] The characteristics of the present invention lie in temperature gradient control and energy consumption optimization, which are applicable to the high melting point characteristics and composition uniformity requirements of ferrotitanium alloy.

[0023] In view of the high melting point of ferro-titanium alloy and the corrosiveness of titanium, the inner wall of the furnace body is provided with a furnace lining based on magnesium oxide or calcium oxide. Or a composite furnace lining such as a magnesium oxide-calcium oxide gradient material.

[0024] As Figures 4-5 shown, as a preferred example of the present invention, the vertical partition includes a first vertical partition 21, a second vertical partition 22 and a third vertical partition 23 extending outward with the center of the furnace body as the center of the circle. The three vertical partitions divide the inside of the furnace body into three fan-shaped spaces, and there are also three corresponding flat coils. In this way, the temperature can be divided into three sections. The flat coil corresponding to the first fan-shaped space is used for preheating, the flat coil corresponding to the second fan-shaped space is used for main heating, and the flat coil corresponding to the third fan-shaped space is used for refining. Preheating stage: Heat up to 650°C - 700°C at a rate of 50°C / min - 80°C / min and keep warm for 20 min - 30 min to reduce the risk of titanium absorbing gas. Main heating stage: Increase the power to 100 kW - 400 kW and the frequency to 150 Hz - 600 Hz, and quickly heat up to 1350°C - 1500°C, and promote alloying through electromagnetic stirring. Refining stage: Reduce the power to 50 kW - 100 kW and keep warm for 30 min - 60 min, and at the same time blow inert gas (such as argon) through the feed port to remove inclusions. In this way, different flat coils can have different input current parameters, with high and low combinations and relay cooperation. There is no need for all flat coils to work simultaneously, which greatly reduces energy consumption and shortens the melting time.

Claims

1. High-efficiency and energy-saving titanium-iron alloy smelting device, characterized by: include: A furnace body (1); a vertical partition (2), wherein the vertical partition divides the space inside the furnace body into at least two sector-shaped areas; At least two flat coils (3), the two flat coils being vertically arranged outside the furnace body and corresponding to the two sector-shaped areas; A cover plate (4), the cover plate being located at the top of the furnace body; a driving mechanism (5), the driving mechanism being in driving connection with the top of the vertical partition plate to drive the vertical partition plate to rotate; a feed port (6), the feed port being opened on the cover plate; and a discharge port (7), the discharge port being opened at the bottom of the furnace body and being located in a fan-shaped area.

2. The high-efficiency and energy-saving titanium-iron alloy smelting device according to claim 1 is characterized in that: The vertical partition divides the space in the furnace into two sector-shaped areas.

3. The high-efficiency and energy-saving titanium-iron alloy smelting device according to claim 1 is characterized in that: The vertical partitions comprise a first vertical partition (21), a second vertical partition (22) and a third vertical partition (23) extending outwards with the center of the furnace body as the center of the circle.

4. The high-efficiency and energy-saving titanium-iron alloy smelting device according to claim 1 is characterized in that: The driving mechanism is a motor.

5. The high-efficiency and energy-saving titanium-iron alloy smelting device according to claim 1 is characterized in that: The flat coil is fixedly connected to the outer wall of the furnace body via an insulating member (8).

6. The high-efficiency and energy-saving titanium-iron alloy smelting device according to claim 5 is characterized in that: The insulating member is a bakelite column.

7. The high-efficiency and energy-saving titanium-iron alloy smelting device according to claim 1 is characterized in that: The inner wall of the furnace body is provided with a magnesium oxide or calcium oxide based furnace lining.

8. The method for using the high-efficiency and energy-saving titanium-iron alloy smelting device according to any one of claims 1 to 7, characterized in that: The following steps are involved: The ferrotitanium alloy to be smelted is placed into at least two fan-shaped spaces in the furnace body through a feed port, a flat coil is started by an external power supply, and the ferrotitanium alloy in the fan-shaped space facing the flat coil is heated to 650°C-700°C, the driving mechanism is started to rotate the vertical partition so that the ferrotitanium alloy in the fan-shaped space faces another flat coil, and another flat coil is driven by an external power supply to heat the ferrotitanium alloy in the fan-shaped space to 1500°C-1600°C, and the molten ferrotitanium alloy is discharged from a discharge port, and the ferrotitanium alloy in the remaining fan-shaped spaces is melted in this way and discharged from the discharge port.

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