Continuous casting device and method for manganese-series iron alloy

Abstract

The invention discloses a continuous casting device and method for manganese-series iron alloy, and the continuous casting device comprises a casting ladle, a crystallizer arranged below the casting ladle, a tundish arranged between the casting ladle and the crystallizer, a transportation mechanism arranged on one side of the crystallizer, and a throwing machine arranged between the crystallizer and the transportation mechanism. The collecting box is arranged on the side, away from the throwing machine, of the conveying mechanism, the cutting mechanism is arranged between the conveying mechanism and the throwing machine, a vibration mechanism and a liquid cooling unit are arranged on the crystallizer, and an air cooling unit is arranged at the top of the conveying mechanism; the ferromanganese alloy is prepared through the continuous casting process, the ferromanganese liquid only needs 50-60 s from casting to solidification, rapid solidification is achieved, the uniformity of components of the ferromanganese alloy is greatly improved, the product quality is improved, the related ferromanganese continuous casting process continuously produces casting blanks from the liquid ferromanganese liquid, the working procedures of water spraying cooling and jaw breaking are reduced, the production period is shortened, and the production cost is reduced. Manpower and equipment investment is saved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of manganese-iron alloys, and in particular relates to a continuous casting device and method for manganese-based ferroalloys. Background Art

[0002] Manganese alloys are hard and brittle, and are prone to self-fragmentation and pulverization during solidification. The pulverization rate is about 20%. 20% of the pulverized ferromanganese must be returned to the furnace for remelting, which greatly reduces the product yield and increases production costs. In addition, manganese alloys also have problems such as severe segregation, uneven composition, large and uneven size of precipitated secondary phases, and severe matrix splitting during solidification.

[0003] At present, there are three main methods for casting manganese-based ferroalloys: pit casting, cast iron ingot casting, and plate chain cast iron machine. Pit casting occupies a large area, slag and iron are difficult to separate, alloy segregation is serious, solidification speed is slow, product quality is poor, labor intensity is high, and crushing rate is high. It has been eliminated. Cast iron ingot casting has good product quality but the output of a single ingot mold is small, the demand for ingot molds is large, the area occupied is large, and the flue gas cannot be handled during casting, which does not meet the requirements of green production. The plate chain cast iron machine has the characteristics of finished products not needing to be crushed, short production line, and good production continuity. However, when casting iron, it is necessary to cast at a fixed point, and the smoke is easy to handle, but the output is small, the equipment is difficult to scale up, the service life of the ingot mold is short, and the size of the cast ingot is relatively large. After the casting is completed, the large manganese iron block still needs to be put into the jaw crusher for jaw crushing, and the manganese iron powdering rate reaches 20-30%, resulting in a low yield rate and increasing the production cost of the enterprise. In summary, there is an urgent need for a continuous casting device and method for manganese-based ferroalloys, so that the casting process of the manganese-based ferroalloys can achieve the effects of fast solidification speed, small footprint, high product quality and high yield rate. Summary of the invention

[0004] In order to solve part or all of the technical problems existing in the above-mentioned prior art, the present invention provides a continuous casting device and method for manganese-based ferroalloy.

[0005] On the one hand, the continuous casting device for manganese-based ferroalloy provided by the present invention comprises a ladle, a crystallizer arranged below the ladle, a tundish arranged between the ladle and the crystallizer, a transport mechanism arranged on one side of the crystallizer, a casting machine arranged between the crystallizer and the transport mechanism, a collecting box arranged on a side of the transport mechanism away from the casting machine, and a cutting mechanism arranged between the transport mechanism and the casting machine, wherein:

[0006] The crystallizer is provided with a vibration mechanism and a liquid cooling unit, the crystallizer is inclined at a preset angle to the horizontal plane, a first feed port is provided at one end of the crystallizer, a first discharge port is provided at the other end, a dummy rod is provided inside the first discharge port, the top of the ladle, the top of the aggregate box, and the top of the tundish are all set as openings, an air cooling unit is provided on the top of the transport mechanism, a second feed port is provided at one end of the transport mechanism, and a second discharge port is provided at the other end;

[0007] A first water inlet is provided at the bottom of the ladle, a second water inlet is provided at the bottom of the tundish, the first water inlet is provided at the top of the tundish, the second water inlet is connected to the first feed inlet, and the second discharge inlet is located above the aggregate box.

[0008] Furthermore, in the above-mentioned continuous casting device for manganese-based ferroalloys, the ladle is provided with an injection flow control unit.

[0009] Furthermore, in the above-mentioned continuous casting device for manganese-based ferroalloys, a slag retaining wall, a filter, and a heating mechanism are provided in the tundish.

[0010] Furthermore, in the above-mentioned continuous casting device for manganese-based ferroalloys, the crystallizer is closed at one end of the first feed port, and an opening is provided at the top of one end of the first discharge port.

[0011] As a specific implementation, in the above-mentioned continuous casting device for manganese-based ferroalloys, the ladle, the tundish, the crystallizer, the casting machine, and the transportation mechanism are all fixed to the ground through a support frame.

[0012] As a specific implementation, in the above-mentioned continuous casting device for manganese-based ferroalloys, the angle between the crystallizer and the horizontal plane is 0° to 10°.

[0013] As a specific implementation, in the above-mentioned continuous casting device for manganese-based ferroalloys, the tundish is arranged on the tundish car, and the tundish car can be displaced in a direction perpendicular to the axis of the crystallizer.

[0014] As a specific implementation, in the above-mentioned continuous casting device for manganese-based ferroalloys, the vibration mechanism is a pneumatic vibrator.

[0015] As a specific implementation, in the above-mentioned continuous casting device for manganese-based ferroalloys, the cutting mechanism adopts a water jet mechanism.

[0016] On the other hand, the continuous casting method for manganese-based ferroalloy provided by the present invention comprises:

[0017] Step 1: firstly, placing the ladle containing ferromanganese liquid on the top of the support frame, moving the tundish to below the first water inlet, connecting the second water inlet to the first feed inlet, starting the vibration mechanism, the liquid cooling unit and the air cooling unit, and then placing a part of the dummy rod in the casting machine and the other part in the first discharge port;

[0018] Step 2: Open the first water inlet and the second water inlet. At this time, the ferromanganese liquid flows from the ladle into the tundish, and then flows from the tundish into the crystallizer. Under the action of the vibration mechanism and the liquid cooling unit, the ferromanganese liquid condenses at one end of the dummy rod. When the solidified layer of the ferromanganese liquid shell reaches a predetermined thickness, the casting machine is started, and the casting formed by the ferromanganese liquid condenses moves toward the side close to the casting machine along with the dummy rod.

[0019] Step 3: After the cast billet passes through the billet drawing machine, the cast billet is separated from the dummy rod, and as the billet drawing machine operates, the cast billet moves to the cutting mechanism and is cut by the cutting mechanism;

[0020] Step 4: The cut ingot falls into the transport mechanism, is cooled by the air cooling unit, and then is transported to the aggregate box by the transport mechanism.

[0021] The continuous casting device and method for manganese-based ferroalloys of the present invention have the following advantages and positive effects:

[0022] (1) The present invention adopts a continuous casting process to prepare ferromanganese alloy. Different from the existing casting method, it only takes 50s to 60s from casting to solidification of the liquid, which achieves rapid solidification, greatly increases the uniformity of the ferroalloy composition, and improves the product quality. The ferromanganese continuous casting process involved continuously produces ingot particles from liquid ferromanganese liquid, reduces the water spray cooling and jaw crushing processes, shortens the production cycle, saves manpower and equipment investment, and improves production efficiency;

[0023] (2) The present invention utilizes the ferromanganese continuous casting process for direct thermal breaking, thereby reducing the crushing step after cooling, greatly reducing the crushing rate, greatly improving the yield rate, reducing energy consumption, and being beneficial to energy conservation and emission reduction. In addition, a nearly horizontal liquid-cooled copper crystallizer with a certain angle is adopted, which has high efficiency and fast solidification. The copper crystallizer is cooled by a liquid cooling unit. The continuous casting process adopted is highly automated, reducing manual intervention and improving production efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 It is a schematic structural diagram of a continuous casting device for manganese-based ferroalloys of the present invention;

[0026] Figure 2 yes Figure 1 A partial enlarged view of part Ⅰ.

[0027] Description of reference numerals:

[0028] 1- ladle, 2- tundish, 3- crystallizer, 4- vibration mechanism, 5- liquid cooling unit, 6- casting machine, 7- cutting mechanism, 8- transport mechanism, 9- air cooling unit, 10- aggregate box, 11- ingot guide rod, 12- casting billet, 13- support frame. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 1 to Figure 2 As shown, the present invention provides a continuous casting device and method for manganese-based ferroalloys.

[0031] On the one hand, the present invention discloses a continuous casting device for manganese-based ferroalloys, comprising a ladle 1, a crystallizer 3 disposed below the ladle 1, a tundish 2 disposed between the ladle 1 and the crystallizer 3, a transport mechanism 8 disposed on one side of the crystallizer 3, a casting machine 6 disposed between the crystallizer 3 and the transport mechanism 8, a collecting box 10 disposed on the side of the transport mechanism 8 away from the casting machine 6, and a cutting mechanism 7 disposed between the transport mechanism 8 and the casting machine 6. The ladle 1 receives ferromanganese liquid from a smelting furnace, and the container The amount matches the tonnage of the smelting furnace, and the capacities of the ladle 1 and the tundish 2 also match each other. The crystallizer 3 is made of copper, which can quickly solidify the ferromanganese liquid into a solid ingot 12. Among them, the crystallizer 3 is provided with a vibration mechanism 4 and a liquid cooling unit 5. The liquid cooling unit 5 covers the outer wall of the crystallizer 3. The outer wall of the crystallizer 3 takes away the heat dissipated by the solidification of the ferromanganese liquid through the liquid cooling unit 5. More specifically, in the liquid cooling unit 5, the flow rate of the coolant is controlled at 6m / s to 12m / s, and the temperature difference of the inlet and outlet is controlled at The crystallizer 3 is inclined at a preset angle to the horizontal plane, a first feed port is arranged at one end of the crystallizer 3, a first discharge port is arranged at the other end, a dummy rod 11 is arranged inside the first discharge port, the top of the ladle 1, the top of the aggregate box 10, and the top of the tundish 2 are all opened, and the ferromanganese liquid can be directly poured into the tundish 2 from the first water port, and the ingot 12 on the transport mechanism 8 can be directly dropped into the aggregate box 10 as the transport mechanism 8 operates, and an air-cooled unit is arranged on the top of the transport mechanism 8. Element 9, the transport mechanism 8 is cooled by an air cooling unit 9, a second feed port is provided at one end of the transport mechanism 8, and a second discharge port is provided at the other end; a first water inlet is provided at the bottom of the ladle 1, the ferromanganese liquid in the ladle 1 is poured into the tundish 2 through the first water inlet, a second water inlet is provided at the bottom of the tundish 2, the first water inlet is provided at the top of the tundish 2, the second water inlet is connected to the first feed port, the ferromanganese liquid in the tundish 2 is poured into the crystallizer 3 through the second water inlet, and the second discharge port is located above the aggregate box 10.

[0032] Furthermore, in the continuous casting device for manganese-based ferroalloys of the present invention, the ladle 1 is provided with a flow control unit (not shown in the figure), which can make the ferromanganese liquid flow stably into the tundish 2.

[0033] Furthermore, in the continuous casting device for manganese-based ferroalloys of the present invention, a slag retaining wall (not shown in the figure), a filter (not shown in the figure), a heating mechanism (not shown in the figure), and a low retaining wall (not shown in the figure) are provided in the tundish 2 to control the flow of ferromanganese liquid and realize effective collision, growth and floating of inclusions. The heating mechanism is used to ensure the stability of the casting temperature.

[0034] Furthermore, in the continuous casting device for manganese-based ferroalloys of the present invention, the crystallizer 3 is closed at one end of the first feed port, and an opening is provided at the top of one end of the first discharge port. The liquid cooling unit 5 only covers the middle and bottom of one end of the first discharge port. More specifically, the crystallizer 3 adopts a water-cooled vertical copper crystallizer 3, and the first discharge port on the crystallizer 3 is connected to the second discharge port. The transverse cross-section is consistent with the size requirements of the ingot 12, ensuring that the ingot 12 can be continuously pulled out while the ferromanganese liquid can be continuously poured in. The crystallizer 3 is 1000mm to 2000mm long and the copper wall thickness is 100mm to 400mm.

[0035] As a specific embodiment, in the continuous casting device for manganese-based ferroalloys of the present invention, the ladle 1, the tundish 2, the crystallizer 3, the casting machine 6, and the transport mechanism 8 are all fixed to the ground through a support frame 13. Of course, they can also be fixed in other ways, which are not limited here.

[0036] As a specific embodiment, in the continuous casting device for manganese-based ferroalloys of the present invention, the angle between the crystallizer 3 and the horizontal plane is 0°~10°. With this arrangement, the cast billet 12 in the crystallizer 3 can be more conveniently pulled out by the billet drawing machine 6 through the vibration of the vibration mechanism 4 and the gravity factor.

[0037] As a specific embodiment, in the continuous casting device for manganese-based ferroalloys of the present invention, the tundish 2 is arranged on a tundish car (not shown in the figure), and the tundish car can be displaced in a direction perpendicular to the axis of the crystallizer 3. The tundish car carries the tundish 2, and the tundish 2 receives the ferromanganese liquid in the ladle 1 to realize the diversion of the ferromanganese liquid and the connection when replacing the ladle 1.

[0038] As a specific implementation mode, in the continuous casting device for manganese-based ferroalloys of the present invention, the vibration mechanism 4 is a pneumatic vibrator. Of course, the vibration mechanism 4 can also adopt a hydraulic vibrator, a four-bar vibrator or the like, as long as the vibration effect is met. More specifically, the vibration mode of the vibration mechanism 4 is forward and backward vibration, and it is necessary to ensure that the ingot 12 has a negative slip time, the amplitude is controlled between 1mm and 10mm, and the vibration frequency is controlled between 400-800 / S. With such an arrangement, the vibration mechanism 4 can ensure that the ingot 12 and the crystallizer 3 are not adhered to each other, which is convenient for demolding the ingot 12.

[0039] As a specific implementation, in the continuous casting device for manganese-based ferroalloys of the present invention, the cutting mechanism 7 adopts a water jet mechanism. Of course, the cutting mechanism 7 can also adopt a mist knife mechanism, a manipulator and other mechanisms as long as the cutting effect on the ingot 12 is met.

[0040] On the other hand, the continuous casting method for manganese-based ferroalloy of the present invention is implemented using the above-mentioned continuous casting device, and specifically comprises the following steps:

[0041] Step 1: First, place the ladle 1 containing ferromanganese liquid on the top of the support frame 13, move the tundish 2 to the casting position below the first water inlet through the tundish car, connect the second water inlet to the first feed inlet, start the vibration mechanism 4, the liquid cooling unit 5, and the air cooling unit 9, and then place a part of the dummy rod 11 in the casting machine 6, and the other part in the first discharge port;

[0042] Step 2: Open the first water inlet and the second water inlet. At this time, the ferromanganese liquid flows from the ladle 1 into the tundish 2 to realize the diversion of the ferromanganese liquid and the connection when the ladle 1 is replaced. Then the ferromanganese liquid flows from the second water inlet of the tundish 2 into the first feed port of the crystallizer 3, and is blocked by the dummy rod 11 at the first discharge port. Under the action of the vibration mechanism 4 and the liquid cooling unit 5, the ferromanganese liquid condenses at one end of the dummy rod 11. When the solidified layer of the ferromanganese liquid shell reaches a predetermined thickness, the casting machine 6 is started, and the casting 12 condensed from the ferromanganese liquid moves toward the side close to the casting machine 6 along with the dummy rod 11;

[0043] Step 3: After the billet 12 passes through the billet drawing machine 6, the billet 12 is separated from the dummy rod 11. As the billet drawing machine 6 operates, the billet 12 moves to the cutting mechanism 7 and is cut by the cutting mechanism 7. The cutting mechanism 7 cuts the billet 12 into required sizes and particle sizes. The shape and size of the billet 12 to be cut should be set according to the needs in actual use;

[0044] Step 4: The cut ingot 12 falls into the second feed port of the transport mechanism 8 , and is cooled by the air cooling unit 9 as the transport mechanism 8 operates. It is then transported to the collection box 10 through the second discharge port on the transport mechanism 8 to be packaged.

[0045] More specifically, in the continuous casting method for manganese-based ferroalloys of the present invention, when the solidified layer of the ferromanganese liquid shell reaches a thickness of 10 mm to 15 mm, the casting machine 6 is then started.

[0046] As a specific implementation, in the continuous casting method for manganese-based ferroalloys of the present invention, the entire casting process is controlled by an automatic control system and dynamically optimized by an expert system.

[0047] As a specific embodiment, in the continuous casting method for manganese-based ferroalloys of the present invention, the time for ferromanganese liquid to solidify into the ingot 12 is between 50s and 60s, and the time for ferromanganese from casting to packaging is between 550s and 650s.

[0048] In summary, compared with the prior art, the continuous casting device and method for manganese-based ferroalloys of the present invention have the following advantages and positive effects:

[0049] (1) The present invention adopts a continuous casting process to prepare ferromanganese alloy. Different from the existing casting method, it only takes 50s to 60s from casting to solidification of the liquid, which achieves rapid solidification, greatly increases the uniformity of the ferroalloy composition, and improves the product quality. The ferromanganese continuous casting process involved continuously produces a casting billet 12 from liquid ferromanganese liquid, reduces the water spray cooling and jaw crushing processes, shortens the production cycle, saves manpower and equipment investment, and improves production efficiency;

[0050] (2) The present invention utilizes the ferromanganese continuous casting process for direct thermal breaking, thereby reducing the crushing step after cooling, greatly reducing the crushing rate, greatly improving the yield rate, reducing energy consumption, and being beneficial to energy conservation and emission reduction. In addition, a nearly horizontal liquid-cooled copper crystallizer 3 with a certain angle is adopted, which has high efficiency and fast solidification. The copper crystallizer 3 is cooled by a liquid cooling unit 5. The continuous casting process adopted is highly automated, reducing manual intervention and improving production efficiency and safety.

[0051] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A continuous casting device for manganese-based ferroalloys, characterized in that: The continuous casting device comprises a ladle, a crystallizer arranged below the ladle, a tundish arranged between the ladle and the crystallizer, a transport mechanism arranged at one side of the crystallizer, a casting machine arranged between the crystallizer and the transport mechanism, a collecting box arranged at a side of the transport mechanism away from the casting machine, and a cutting mechanism arranged between the transport mechanism and the casting machine, wherein: The crystallizer is provided with a vibration mechanism and a liquid cooling unit, the crystallizer is inclined at a preset angle to the horizontal plane, a first feed port is provided at one end of the crystallizer, a first discharge port is provided at the other end, a dummy rod is provided inside the first discharge port, the top of the ladle, the top of the aggregate box, and the top of the tundish are all set as openings, an air cooling unit is provided on the top of the transport mechanism, a second feed port is provided at one end of the transport mechanism, and a second discharge port is provided at the other end; A first water inlet is provided at the bottom of the ladle, a second water inlet is provided at the bottom of the tundish, the first water inlet is provided at the top of the tundish, the second water inlet is connected to the first feed inlet, and the second discharge inlet is located above the aggregate box.

2. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The ladle is provided with an injection flow control unit.

3. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The tundish is provided with a slag retaining wall, a filter and a heating mechanism.

4. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The crystallizer is closed at one end of the first feed port, and is provided with an opening at the top of one end of the first discharge port.

5. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The ladle, the tundish, the crystallizer, the casting machine and the transport mechanism are all fixed to the ground through a support frame.

6. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The angle between the crystallizer and the horizontal plane is 0° to 10°.

7. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The tundish is arranged on the tundish car, and the tundish car can be displaced in a direction perpendicular to the axis of the crystallizer.

8. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The vibration mechanism is a pneumatic vibrator.

9. The continuous casting device for manganese-based ferroalloy according to claim 1, characterized in that: The cutting mechanism adopts a water jet mechanism.

10. A continuous casting method for a manganese-based ferroalloy, the continuous casting method being implemented using the continuous casting device according to any one of claims 1 to 3, comprising: Step 1: firstly, placing the ladle containing ferromanganese liquid on the top of the support frame, moving the tundish to below the first water inlet, connecting the second water inlet to the first feed inlet, starting the vibration mechanism, the liquid cooling unit and the air cooling unit, and then placing a part of the dummy rod in the casting machine and the other part in the first discharge port; Step 2: Open the first water inlet and the second water inlet. At this time, the ferromanganese liquid flows from the ladle into the tundish, and then flows from the tundish into the crystallizer. Under the action of the vibration mechanism and the liquid cooling unit, the ferromanganese liquid condenses at one end of the dummy rod. When the solidified layer of the ferromanganese liquid shell reaches a predetermined thickness, the casting machine is started, and the casting formed by the ferromanganese liquid condenses moves toward the side close to the casting machine along with the dummy rod. Step 3: After the cast billet passes through the billet drawing machine, the cast billet is separated from the dummy rod, and as the billet drawing machine operates, the cast billet moves to the cutting mechanism and is cut by the cutting mechanism; Step 4: The cut ingot falls into the transport mechanism, is cooled by the air cooling unit, and then is transported to the aggregate box by the transport mechanism.

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