Iron alloy casting chute, casting device and control process thereof

Abstract

The invention relates to the technical field of pouring equipment, in particular to an iron alloy pouring chute, a pouring device and a control process of the iron alloy pouring chute. The iron alloy casting chute comprises a casting chute and a swing mechanism, wherein the casting chute comprises a main chute and an auxiliary chute; the main chute comprises a chute molten pool and a main chute channel, one side of the chute molten pool is communicated with one end of the main chute channel, the other end of the main chute channel is connected with the auxiliary chute, the auxiliary chute comprises a telescopic structure, and the auxiliary chute stretches out and draws back in the pouring direction through the telescopic structure; and the swinging mechanism is arranged at the bottom of the main chute. Starting from the heat loss influence of molten iron on the mold, the auxiliary chute capable of swinging and stretching is arranged, hot scouring and hot erosion of the molten iron on the surface of the mold are uniform through multi-track swinging, and the phenomenon that the mold is damaged unevenly is avoided; meanwhile, the height difference between the molten iron outlet and the mold is reduced to the minimum through extension and retraction of the auxiliary chute, the mold is prevented from being excessively damaged due to large molten iron casting potential energy, and the service life of the mold is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of casting equipment, in particular to a ferroalloy casting chute, a casting device and a control process thereof. Background Art

[0002] In the ferroalloy production process, the casting of alloy solution mostly adopts the traditional mold casting method and pool casting method. The mold casting and pool casting casting processes are mature and the production cost is relatively low, but the shortcomings are also obvious, such as poor workshop production environment, difficulty in collecting casting smoke, high labor intensity of employees, and high safety risks in high temperature and high intensity area operations. For this reason, in recent years, some production units or research institutions in the industry have successively developed various types of ferroalloy automatic continuous casting machines, such as linear casting machines, disc casting machines, chain plate casting machines, ring casting machines, etc. Various casting machines have achieved great improvements and qualitative changes in solving the workshop working environment and reducing the labor intensity and safety risks of employees. The only thing is that the operating cost is high. It is calculated that the main reason for the high cost is the large mold consumption, which causes the comprehensive cost to remain high.

[0003] During the molten iron casting process, the main factors of mold damage are the thermal erosion and thermal corrosion of the molten iron on the mold. Among them, the thermal erosion damage of the molten iron to the mold is related to the gravitational potential energy of the molten iron on the casting point of the mold, and secondly to the momentum of the thermal erosion of the molten iron on the casting point of the mold. At the same time, it is related to the duration or cumulative duration of the thermal erosion of the molten iron on the casting point of the mold. It can be understood that the thermal erosion damage of the molten iron on the casting point is related to the impulse.

[0004] Therefore, there is an urgent need for a ferroalloy casting chute, a pouring device and its control process, analyze the factors affecting the thermal erosion of molten iron on the mold, and develop corresponding chute equipment in the process of process optimization to reduce the damage of the mold caused by thermal erosion and increase the overall service life of the mold. Summary of the invention

[0005] In order to overcome the problems existing in the prior art, the present invention aims to provide a ferroalloy casting chute, a pouring device and a control process thereof.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ferroalloy casting chute, comprising a casting chute and a swing mechanism, wherein the casting chute comprises a main chute and an auxiliary chute; the main chute comprises a chute molten pool and a main chute channel, one side of the chute molten pool is connected to one end of the main chute channel, and the other end of the main chute channel is connected to the auxiliary chute, the auxiliary chute comprises a telescopic structure, and the auxiliary chute is telescopic along the casting direction through the telescopic structure; the swing mechanism is arranged at the bottom of the main chute.

[0007] The chute molten pool is mainly used to receive molten iron, that is, the molten iron from the ladle is directly injected into the chute molten pool, and the molten iron then enters the auxiliary chute through the main chute channel. The auxiliary chute also serves as a molten iron circulation channel, and the molten iron enters the mold through the auxiliary chute channel. The auxiliary chute is a telescopic design to adjust the height of the auxiliary chute outlet and the mold.

[0008] The present invention is further configured as follows: the telescopic structure is a fixed slide rail structure, a gear rack telescopic structure or a hydraulic telescopic stepper.

[0009] The present invention is further configured as follows: the swing mechanism includes a gear, a rack and a hydraulically driven push rod arranged on a base, the gear is arranged at the bottom of the main chute, the rack is meshed and connected with the gear, and one end of the rack is connected to the hydraulically driven push rod.

[0010] The present invention is further configured as follows: the outer layer of the main chute is a cast steel structural frame, the inner layer is thermal insulation cotton, the inner layer of the thermal insulation cotton is semi-graphite silicon carbide bricks, and the inner layer of the semi-graphite silicon carbide bricks is a casting material coating layer.

[0011] The present invention is further configured as follows: the main chute channel is inclined to the pool surface of the chute molten pool, the inclination angle ranges from 8° to 20°, and the preferred inclination angle is 10°; the chute molten pool adopts a circular or arc-shaped structure, and a reserved groove is provided at the bottom of the cast steel structure frame at the outlet of the main chute channel, and a scraper brick is installed in the reserved groove. The scraper brick is a SiC scraper brick, which is used to treat high-temperature sticky materials that may be deposited during the casting process.

[0012] A ferroalloy casting device comprises a ladle, a mold moving assembly and the above-mentioned ferroalloy casting chute, wherein the mold moving assembly is arranged below the ferroalloy casting chute, the ladle is arranged above the ferroalloy casting chute, and the ladle is connected to the chute molten pool; the mold moving assembly comprises a plurality of mold plates.

[0013] The present invention is further configured as follows: the mold moving assembly also includes a moving track, a conveying bracket and a plurality of support frames; a plurality of pulleys are arranged at the bottom of the conveying bracket, and the pulleys are arranged on the moving track and move along the moving track; a plurality of groups of evenly spaced support frames are arranged above the conveying bracket, and the mold plate is installed on the support frames.

[0014] The present invention is further configured as follows: the middle of the mold plate is concave, and the two sides are convex, and a transition plate is arranged between two adjacent mold plates.

[0015] The present invention is further configured as follows: the ferroalloy casting device also includes a driver and n triggers, the driver is used to drive the conveying bracket to move along the movable track, and the triggers are sequentially arranged on the bracket on one side of the conveying bracket, when the first trigger is triggered, the water outlet of the auxiliary chute is located at one end relative to the mold plate; when the nth trigger is triggered, the water outlet of the auxiliary chute is located at the other end relative to the mold plate.

[0016] The present invention also includes a ferroalloy casting device control process, which is used in conjunction with the above-mentioned ferroalloy casting device and includes the following steps:

[0017] Step S1: When the mold is running, molten iron is poured from the ladle into the chute molten pool, and then enters the auxiliary chute through the main chute channel;

[0018] Step S2: the driver drives the conveying bracket to move along the moving track, and the edge of the mold plate triggers n triggers in sequence during the operation;

[0019] Step S3: When the molten iron reaches the outlet of the auxiliary chute, the first trigger is activated and sends a swing signal to the swing mechanism, which starts to swing and sends the current position of the auxiliary chute at the same time, and triggers the second to nth triggers in sequence with the horizontal stepping position;

[0020] Step S4: The first trigger corresponds to controlling the sub-chute to retract to the set minimum position. When the horizontal step reaches the second trigger position, the second trigger corresponds to controlling the sub-chute to start extending. When the horizontal step reaches the 3rd to n-2nd trigger position, the control chute is extended to the maximum. The n-1th trigger corresponds to controlling the sub-chute to retract. When it moves to the nth trigger position, the chute is retracted to the set minimum position.

[0021] Step S5: Repeat steps S2-S4 until the pouring of all mold plates on the moving track is completed.

[0022] The present invention realizes the chute swing technology by changing the chute structure according to the process goal to be achieved in the molten iron casting process, so that the mold surface is evenly scoured, that is, under a constant force, the cumulative scouring time of each point on the mold surface is equal; by adding a telescopic "auxiliary chute", it is ensured that the relative minimum height difference between the chute molten iron outlet and the mold is maintained and maintained within a constant height difference value; through experience combined with theoretical analysis, a suitable chute inclination angle is selected to reduce the momentum impact speed of the molten iron on the mold.

[0023] In summary, the beneficial effects of the above technical solution of the present invention are as follows:

[0024] 1. The chute molten pool of the present invention adopts a circular structure or an arc structure, which can ensure that the relative position of the ladle outlet in the chute molten pool remains unchanged during the swing of the chute; the multi-track swing of the chute allows the molten iron to be evenly thermally scour and thermally eroded by the molten iron on the surface of the mold, avoiding uneven damage to the mold; at the same time, the auxiliary chute telescopic track movement reduces the height difference between the molten iron outlet and the mold to a minimum, protecting the mold from excessive damage caused by the large potential energy of molten iron casting.

[0025] 2. The present invention takes the heat loss effect of molten iron on the mold as a starting point in the design, and optimizes the process from the casting height, the molten iron flow rate, the continuous flushing time of molten iron on the mold, and the cumulative flushing time, so as to control the heat loss of molten iron on the mold by process to extend the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 Top view of the ferroalloy casting chute.

[0028] Figure 2 Schematic diagram of scraper brick location.

[0029] Figure 3 Schematic diagram of the swing mechanism.

[0030] Figure 4 This is a top view of the ferroalloy casting chute.

[0031] Figure 5 Schematic diagram of the pouring trajectory.

[0032] Figure 6 It is a schematic diagram of the telescopic trajectory of the auxiliary chute.

[0033] In the accompanying drawings, the meanings of the symbols are as follows:

[0034] 101. chute molten pool, 102. main chute channel, 103. auxiliary chute, 104. scraper brick, 105. telescopic track, 106. base, 107. hydraulic drive push rod, 108. rack, 109. gear, 200. ladle, 300. drive, 310. trigger, 400. mold moving assembly, 410. bracket, 420. mold plate, 430. transition plate, 440. support frame, 450. conveying bracket, 460. moving track, 470, pulley. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by ordinary technicians in the field without making any creative work should all fall within the scope of protection of the present invention.

[0036] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0037] Embodiment 1:

[0038] like Figure 1-Figure 3 As shown, it is a preferred embodiment of the present invention, a ferroalloy casting chute, including a casting chute and a swing mechanism, the casting chute includes a main chute and an auxiliary chute 103; the main chute includes a chute molten pool 101 and a main chute channel 102, one side of the chute molten pool 101 is connected to one end of the main chute channel 102, and the other end of the main chute channel 102 is connected to the auxiliary chute 103, the auxiliary chute 103 includes a telescopic structure, and the auxiliary chute 103 is telescopic along the casting direction through the telescopic structure; the swing mechanism is arranged at the bottom of the main chute.

[0039] The chute molten pool 101 is mainly used to receive molten iron, that is, the molten iron from the ladle is directly injected into the chute molten pool 101, and the molten iron then enters the auxiliary chute 103 through the main chute channel 102. The auxiliary chute 103 also serves as a molten iron circulation channel, and the molten iron enters the mold through the auxiliary chute 103. The auxiliary chute 103 is a telescopic design, which is used to adjust the height between the water outlet of the auxiliary chute 103 and the mold. The telescopic structure is a fixed slide rail structure, a gear rack telescopic structure or a hydraulic telescopic stepper.

[0040] The ferroalloy casting chute also includes a telescopic driving component, which is arranged on the main chute channel 102, and the extended end of the telescopic driving component is connected to the auxiliary chute 103. The telescopic driving component is electrically connected to an external control system, and the external control system controls the auxiliary chute 103 to extend or retract relative to the main chute channel 102.

[0041] like Figure 3 As shown, the swing mechanism includes a gear 109, a rack 108 and a hydraulically driven push rod 107 arranged on a base 106, the gear 109 is arranged at the bottom of the main chute, the rack 108 is meshed and connected with the gear 109, and one end of the rack 108 is connected to the hydraulically driven push rod 107.

[0042] The outer layer of the main chute is a cast steel structural frame, and the inner layer is thermal insulation cotton, the inner layer of the thermal insulation cotton is semi-graphite silicon carbide bricks, and the inner layer of the semi-graphite silicon carbide bricks is a casting material coating layer.

[0043] The main chute channel 102 is inclined to the pool surface of the chute molten pool 101, and the inclination angle ranges from 8° to 20°; the chute molten pool 101 adopts a circular or arc-shaped structure, and a reserved groove is set at the bottom of the cast steel structure frame at the outlet of the main chute channel 102, and a scraper brick 104 is installed in the reserved groove. Figure 2 As shown, the scraper brick is a SiC scraper brick, which is used to treat high-temperature sticky materials that may be deposited during the casting process.

[0044] Embodiment 2:

[0045] like Figure 4-Figure 6 As shown, a ferroalloy casting device includes a ladle 200, a mold moving assembly 400 and the above-mentioned ferroalloy casting chute, wherein the mold moving assembly 400 is arranged below the ferroalloy casting chute, the ladle 200 is arranged above the ferroalloy casting chute, and the ladle 200 is connected to the chute molten pool 101; the mold moving assembly 400 includes a plurality of mold plates 420, and the auxiliary chute 103 is in contact with the upper end surface of the mold plate 420.

[0046] The mold moving assembly 400 also includes a moving track 460, a conveying bracket 450 and a plurality of support frames 440; a plurality of pulleys 470 are arranged at the bottom of the conveying bracket 450, and the pulleys 470 are arranged on the moving track 460 and move along the moving track 460; a plurality of groups of evenly spaced support frames 440 are arranged above the conveying bracket 450, and the mold plate 420 is installed on the support frames 440.

[0047] The mold plate 420 is concave in the middle and convex at both sides, and a transition plate 430 is arranged between two adjacent mold plates 420 .

[0048] The ferroalloy casting device also includes a driver 300 and n triggers 310, wherein the driver 300 is used to drive the conveying bracket 450 to move along the movable track 460, and the triggers 310 are sequentially arranged on the bracket 410 on one side of the conveying bracket 450. When the first trigger 310 is triggered, the water outlet of the auxiliary chute 103 is located at one end relative to the mold plate 420; when the nth trigger 310 is triggered, the water outlet of the auxiliary chute 103 is located at the other end relative to the mold plate 420.

[0049] Embodiment 3:

[0050] The present invention also includes a ferroalloy casting device control process, which is used in conjunction with the above-mentioned ferroalloy casting device and includes the following steps:

[0051] Step S1: When the mold is running, molten iron is poured from the ladle 200 into the chute molten pool 101, and then enters the auxiliary chute 103 through the main chute channel 102;

[0052] Step S2: the driver 300 drives the conveying bracket 450 to move along the moving track 460, and the edge of the mold plate 420 triggers n triggers 310 in sequence during the operation;

[0053] Step S3: When the molten iron reaches the outlet of the auxiliary chute 103, the first trigger 310 is activated and sends a swing signal to the swing mechanism, the swing mechanism starts to swing, and at the same time sends the current position of the auxiliary chute 103, and the second to nth triggers 310 are triggered in sequence with the horizontal stepping position;

[0054] In this embodiment, 10 triggers 310 are set. During actual operation, the main and auxiliary chutes swing left and right synchronously. The swinging rule is controlled by the system logic program. The swinging speed changes with the driving speed. The swinging trajectory changes once every time a bag of molten iron is cast. Figure 3 shows a total of 10 swinging trajectory lines, that is, the 1st bag, 11th bag, 21st bag... are cast in the first swinging trajectory line, the 2nd bag, 12th bag, 22nd bag... are cast in the second swinging trajectory line, the 3rd bag, 13th bag, 23rd bag... are cast in the third swinging trajectory line..., and the swinging trajectory line is repeated every time 10 bags of molten iron are cast.

[0055] Step S4: The first trigger 310 controls the auxiliary chute 103 to retract to the set minimum position. When the second trigger 310 is stepped horizontally, the second trigger 310 controls the auxiliary chute 103 to start to extend. When the third to n-2 trigger 310 is stepped horizontally, the auxiliary chute 103 is controlled to extend to the maximum. The n-1 trigger 310 controls the auxiliary chute to retract. When it moves to the nth trigger 310, the auxiliary chute 103 is retracted to the preset minimum position. The extension trajectory of the auxiliary chute 103 is as follows: Figure 5 As shown, the auxiliary chute 103 rises and falls along the telescopic track 105 according to the groove depth of the mold plate 420 and the relative height of the transition plate, and the auxiliary chute 103 performs telescopic movement accordingly. The driver 300 is connected to the trigger 310 by signal.

[0056] Step S5: Repeat steps S2-S4 until the pouring of all mold plates 420 on the moving track 460 is completed.

[0057] After the auxiliary chute 103 completes the current casting task each time, the driver 300 stops, and the auxiliary chute 103 shrinks to the set minimum position, that is, it is in a retracted state. When casting again, the auxiliary chute 103 quickly enters the mold equidistant position according to the trigger instruction, and calculates the remaining stepping trajectory of the current mold.

[0058] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A ferroalloy casting chute, comprising a casting chute and a swing mechanism, characterized in that: The casting chute includes a main chute and an auxiliary chute; the main chute includes a chute molten pool and a main chute channel, one side of the chute molten pool is connected to one end of the main chute channel, and the other end of the main chute channel is connected to the auxiliary chute, the auxiliary chute includes a telescopic structure, and the auxiliary chute is telescopic along the casting direction through the telescopic structure; the swing mechanism is arranged at the bottom of the main chute.

2. The ferroalloy casting chute according to claim 1, characterized in that: The telescopic structure is a fixed slide rail structure, a gear rack telescopic structure or a hydraulic telescopic stepper.

3. The ferroalloy casting chute according to claim 1, characterized in that: The swing mechanism comprises a gear, a rack and a hydraulically driven push rod arranged on a base, the gear is arranged at the bottom of the main chute, the rack is meshed and connected with the gear, and one end of the rack is connected to the hydraulically driven push rod.

4. The ferroalloy casting chute according to claim 1, characterized in that: The outer layer of the main chute is a cast steel structural frame, the inner layer of the main chute is thermal insulation cotton, the inner layer of the thermal insulation cotton is semi-graphite silicon carbide bricks, and the inner layer of the semi-graphite silicon carbide bricks is a casting material coating layer.

5. The ferroalloy casting chute according to claim 4, characterized in that: The main chute channel is inclined to the pool surface of the chute molten pool, and the inclination angle ranges from 8° to 20°; the chute molten pool adopts a circular or arc-shaped structure, and a reserved groove is provided at the bottom of the cast steel structure frame at the outlet of the main chute channel, and a scraper brick is installed in the reserved groove.

6. A ferroalloy casting device, characterized in that: It comprises a ladle, a mold moving assembly and a ferroalloy casting chute according to any one of claims 1 to 5, wherein the mold moving assembly is arranged below the ferroalloy casting chute, the ladle is arranged above the ferroalloy casting chute, and the ladle is connected to the chute molten pool; the mold moving assembly comprises a plurality of mold plates.

7. The ferroalloy casting device according to claim 6, characterized in that: The mold moving assembly also includes a moving track, a conveying bracket and a plurality of support frames; a plurality of pulleys are arranged at the bottom of the conveying bracket, and the pulleys are arranged on the moving track and move along the moving track; a plurality of groups of support frames with uniform spacing are arranged above the conveying bracket, and the mold plate is installed on the support frames.

8. The ferroalloy casting device according to claim 7, characterized in that: The middle part of the mold plate is concave, and the two sides are convex. A transition plate is arranged between two adjacent mold plates.

9. The ferroalloy casting device according to claim 8, characterized in that: The ferroalloy casting device also includes a driver and n triggers, wherein the driver is used to drive the conveying bracket to move along the movable track, and the triggers are sequentially arranged on the bracket on one side of the conveying bracket. When the first trigger is triggered, the water outlet of the auxiliary chute is located at one end relative to the mold plate; when the nth trigger is triggered, the water outlet of the auxiliary chute is located at the other end relative to the mold plate.

10. A ferroalloy casting device control process, used in conjunction with the ferroalloy casting device according to claim 9, comprising the following steps: Step S1: When the mold is running, molten iron is poured from the ladle into the chute molten pool, and then enters the auxiliary chute through the main chute channel; Step S2: the driver drives the conveying bracket to move along the moving track, and the edge of the mold plate triggers n triggers in sequence during the operation; Step S3: When the molten iron reaches the outlet of the auxiliary chute, the first trigger is activated and sends a swing signal to the swing mechanism, which starts to swing and sends the current position of the auxiliary chute at the same time, and triggers the second to nth triggers in sequence with the horizontal stepping position; Step S4: The first trigger controls the auxiliary chute to retract to the preset minimum position. When the horizontal stepping reaches the second trigger position, the second trigger controls the auxiliary chute to start extending. When the horizontal stepping reaches the 3rd to n-2nd trigger position, the control chute is extended to the maximum. The n-1th trigger controls the auxiliary chute to retract. When it moves to the nth trigger position, the chute is retracted to the preset minimum position. Step S5: Repeat steps S2-S4 until the pouring of all mold plates on the moving track is completed.

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