A vertical casting machine, alloy molten iron granulation system and method

Abstract

The present invention discloses a vertical casting machine, an alloy iron granulation system and method, wherein the vertical casting machine comprises a frame, a top trough, a mold platform, a mold, a bottom trough, a slewing bearing and a variable speed drive; the alloy iron granulation system comprises a multi-flow ladle, a granulator, a screening machine, a powder making machine, a hoist, a powder feeder and the above-mentioned vertical casting machine; the alloy iron granulation method: using powder as the bottom seal of the mold, the molten iron is continuously cast into an ingot through the mold on the horizontally rotating vertical casting machine; the ingot is demoulded at a temperature of 600-1300°C and then sent to the granulator for continuous crushing into a granular alloy, and then sieved by the screening machine; the undersize is directly crushed online; the powder is sent to the powder feeder online, and then enters the bottom of the mold of the vertical casting machine as a bottom sealing material or a multi-flow ladle for re-melting; the oversize is loaded into a bucket offline. The vertical casting machine, the alloy iron granulation system and method of the present invention improve the efficiency of alloy iron granulation, the molten iron yield rate and the quality.

Description

Technical Field

[0001] The present invention relates to the technical field of steel smelting, and in particular to a vertical casting machine, a molten alloy iron granulation system and a method. Background Art

[0002] The particle size of ferroalloys used in the steelmaking process is generally 10-60mm. Currently, there are several methods for producing ferroalloys of this particle size:

[0003] (1) Casting in casting pits: Two casting pits are used in turn, and the casting pits are surrounded by thick cast iron blocks. When the first casting pit is full, the ferroalloy is scooped up by a loader, sent to a transport vehicle and transported to a jaw crusher for crushing and screening. The particles that meet the contract requirements are bagged and packaged, and those that do not meet the requirements are either exported at a low price or returned to the furnace for remelting. Smaller ferroalloy companies use large ingot molds or sand pits to first cast the liquid ferroalloy into large iron ingots weighing about 2,000 kg. After cooling, they are manually deslagging and crushing into particles of 10-60 mm. There are five major problems: First, the alloy pulverization rate is high, usually 5%-20% of unqualified powder; second, the process is long, the labor productivity is low, and the quality is difficult to control; second, it takes more than 2 days from iron tapping to packaging. An enterprise with a daily output of 1,000 tons of alloy needs about 500 people for finishing and crushing, which has high labor costs and takes a long time; third, the environmental pollution is serious. The high concentration of dust generated by the contact between the ingot mold coating and the high-temperature molten iron during the casting of ferroalloys forms a huge mushroom cloud that rushes straight into the blue sky accompanied by high-temperature heat waves, causing serious pollution to the surrounding environment and atmosphere; fourth, the casting workshop is dirty, messy and hot. The entire workshop is full of ladles, iron buckets, refractory materials, sand molds or ingot molds and coatings in use. The casting workshops of most companies do not have qualified safety passages, which poses serious safety hazards; fifth, during the slag removal, casting and finishing process, workers must work at an ambient temperature of 1500℃-300℃, and the working environment is harsh.

[0004] (2) Casting with belt casting machine: Use belt casting machine to continuously cast molten iron, and then crush it manually. The method is to place the flat ingot mold for casting on the belt machine, and drive the chain to rotate after the motor is decelerated, and the mold installed on the transmission belt moves continuously. When in use, start the belt casting machine, use a crane to lift the molten iron to the casting station or tilting device, and slowly inject the molten iron in the ladle into the ingot mold on the continuously moving transmission belt through manual control or introduce the molten iron into the casting mold through a diverter and a slag decanter. Finally, an ingot with a length and width of 500-1000mm and a thickness of about 50-70mm is obtained. After demolding and cooling, it is manually crushed into a particle size of 10-60mm. This method has a certain effect on improving production efficiency and reducing labor intensity. The existing problems are: First, the high-temperature molten iron continuously washes onto the mold wall and bottom, causing serious damage to the mold and high mold cost per unit product; second, during the casting process, the molten iron directly washes onto the mold wall, mold edge, and mold bottom, causing serious splashing and a lot of iron leakage from gaps between molds, resulting in a low molten iron recovery rate; third, the length of the belt casting machine is often as long as 50-100m, the equipment is heavy and occupies a large area; fourth, the alloy pulverization rate is high and the yield of finished products is low; fifth, casting dust and smoke are difficult to capture, causing serious environmental pollution.

[0005] (3) Casting by disc casting machine: This is a kind of equipment used for casting copper anode plates, which consists of a disc and its driving system, a quantitative casting device, a spray cooling system, a pre-lifting and lifting device, a clamping device, an extractor, a cooling stacking device, a coating system, etc. The molten copper flows from the copper outlet of the anode furnace to the tundish through the chute. The tundish is equivalent to a copper storage device. It alternately pours molten copper into the casting ladles on both sides. The casting ladles are placed on an electronic scale and are collectively referred to as quantitative casting devices. The weight of the cast anode plate is controlled by it. During the entire casting process, the disc is in an alternating state of operation and rest. When the disc is stationary, the quantitative casting device pours molten copper into the mold. After casting, the disc rotates two mold positions to cast the next anode plate. After the anode plate is spray-cooled, the pre-lifting device first loosens the anode plate. In order to balance the upward force exerted by the pre-lifting device on the disc, a locking mechanism is set above the copper mold corresponding to the pre-lifting position. The loosened qualified anode plates are taken away by the extractor, and the unqualified anode plates are taken away by the waste anode crane. The anode plates taken away by the extractor are put into the water tank for cooling again and automatically arranged into anode stacks, and finally transported away by a forklift. The empty copper mold is transferred to the mold coating position, where the BaS04 mixture is sprayed on it by the mold coating system to prevent the anode plate from "sticking to the mold". The above process is repeated continuously to achieve continuous casting. The weight of an anode plate is between 250-300kg, and the rotation cycle of the disc is about 30s. If this casting method and equipment are used for ferroalloy casting, large ferroalloys are also obtained, and the problems it has are basically the same as those of the belt casting machine. Summary of the invention

[0006] The purpose of the present invention is to provide a vertical casting machine, alloy iron granulation system and method to solve the problems existing in the above-mentioned prior art and improve the efficiency of alloy iron granulation, iron yield and quality.

[0007] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a vertical casting machine, comprising a frame, a top trough, a mold platform, a mold, a bottom trough, a rotating support part and a variable speed drive; the top trough is fixedly arranged at the top end of the mold platform, the top trough is a circular annular trough body, and a bottom plate of the top trough is provided with a plurality of vertical through holes corresponding to the mold positions on the mold platform one by one; the mold platform comprises a top surface flange, a connecting plate and a bottom plate connected in sequence, and a plurality of first demolding holes corresponding to the mold positions on the mold platform are provided on the bottom plate of the mold platform, each of the first demolding holes is provided with a mold, and the mold is clamped between the top trough and the bottom plate of the mold platform;

[0008] The bottom groove is fixed on the frame, the top surface of the bottom groove is slidably matched with the bottom plate of the mold platform, a circular groove is arranged on the top surface of the bottom groove, and a second demolding hole communicating with the groove is arranged at the bottom of the bottom groove; the mold platform is rotatably connected to the frame through the rotating support part, and the variable speed drive can drive the mold platform to rotate.

[0009] Preferably, the speed change driver comprises an input shaft, a speed change cam, an output shaft, a turntable and a driving gear, the speed change cam is fixed on the input shaft, the turntable and the driving gear are fixed on the output shaft, the output shaft is vertical, a plurality of needle roller bearings are evenly distributed on the turntable, each of the needle roller bearings is equidistant from the center of the turntable, the outer ring of the needle roller bearing is in rolling contact with the wheel ridge of the speed change cam, and one end of the input shaft is connected to the external power transmission; the speed change cam is provided with a deformed sinusoidal wheel ridge and a helical wheel ridge with a constant lead angle, and the tangent of the deformed sinusoidal wheel ridge coincides with the first and last points of the helical wheel ridge.

[0010] Preferably, it also includes a vertical reciprocating motion mechanism, which includes a transmission shaft connected to the other end of the input shaft through a coupling, the transmission shaft is coaxial with the input shaft, and the transmission shaft is rotatably arranged in two rolling bearings. A first inertia wheel is arranged at the end of the transmission shaft away from the input shaft, and the rim of the first inertia wheel is rotatably connected to one end of a connecting rod, and the other end of the connecting rod is rotatably connected to a sliding rod; the sliding rod is vertically positioned under the action of two groups of roller groups, a cross bar is fixedly connected to the top end of the sliding rod, and a spring vibration rod and a sprayer nozzle are also fixedly connected to the cross bar, and the spring vibration rod and the sprayer nozzle are also vertically positioned by the two groups of roller groups.

[0011] Preferably, the variable speed drive includes a worm gear, a turbine, an output shaft and a driving gear, the turbine and the driving gear are fixed on the output shaft, the output shaft is vertical, the turbine is meshed with the worm gear, one end of the worm gear is connected to the output shaft of the reducer, and the input shaft of the reducer is connected to the output shaft of the servo motor.

[0012] Preferably, it also includes a vertical reciprocating motion mechanism, which includes a crankshaft connected to the other end of the worm gear through a coupling, the crankshaft is coaxial with the worm gear, the end of the crankshaft away from the input shaft is connected to one end of a connecting rod, and the other end of the connecting rod is connected to a sliding bearing; the sliding bearing is fixedly connected to a cross bar, and a spring vibration rod and a sprayer nozzle are also fixedly connected to the cross bar, and the spring vibration rod and the sprayer nozzle are respectively vertically positioned by two groups of roller groups.

[0013] Preferably, the rotation support portion is a slewing bearing, and a driven gear which is fixedly connected to and coaxial with the casting mold platform is provided on the slewing bearing, and the driven gear is horizontally meshed with the driving gear in the speed-changing driver.

[0014] Preferably, the rotating support portion includes a pin wheel and at least three roller supports, the mold platform is fixedly connected to the pin wheel; the roller support is fixed on a bracket; and the bottom surface of the pin wheel is in rolling contact with the roller of the roller support.

[0015] Preferably, the casting mold is in the shape of a hollow oblate arc column, a hollow rectangular column, a hollow circular column, a hollow elliptical column or a hollow polygonal column; a partition, a support roller group and powder are arranged in the groove of the bottom trough, and the support roller group is in rolling contact with the bottom surface of the bottom plate of the vertical casting machine platform; the shapes of the cross sections of the vertical through hole, the first demolding hole and the second demolding hole all match the shape of the cross section of the ingot.

[0016] The present invention also provides an alloy iron granulation system, comprising a multi-stream package, a granulator, a sieving machine, a powder making machine, a hoist, a powder feeder and the above-mentioned vertical casting machine, wherein the multi-stream package is arranged above the top groove of the vertical casting machine, and there is a gap between the multi-stream package and the top groove, and the bottom surface of the multi-stream package is provided with a plurality of vertical direct current holes, the direct current holes can be coaxial with the casting mold, and the spacing between two adjacent direct current holes is equal to the spacing between two adjacent mold positions on the casting mold platform; the vertical casting machine, the granulator, the sieving machine, the powder making machine, the hoist and the powder feeder are connected in sequence, the powder feeder is arranged above the vertical casting machine, the powder feeder comprises a storage bin and a feeder, the overflow chute at the top of the storage bin extends into the multi-stream package, a gate valve is arranged at the bottom of the storage bin, and the feeder is arranged at the bottom of the storage bin.

[0017] Preferably, it also includes a level detector for detecting the level of molten iron in the multi-stream bag or the casting mold, and determines whether to increase, reduce or stop injecting molten iron into the multi-stream bag based on the signal of the level detector.

[0018] Preferably, the granulator comprises a motor, a reducer, a driving roller, a passive roller and a granulator frame, the shaft of the motor drives the input shaft of the reducer, the output shaft of the reducer drives the driving roller to rotate, the driving roller and the passive roller are both rotatably arranged on the frame of the granulator, and the minimum distance between the roller surface of the driving roller and the roller surface of the passive roller is 1-50 mm smaller than the thickness of the ingot.

[0019] The present invention also provides a method for granulating alloy molten iron: the bottom of the casting mold is sealed with powder, and the molten iron is continuously cast into ingots on a vertical casting machine that performs circulating horizontal rotation; the ingots are demolded at a temperature of 600-1300°C, and after demolding, they are directly transported online to a granulator for continuous crushing into granular alloys; the granular alloys are transported online to a screening machine for screening; the screened material is directly crushed online into powder by a powder making machine; the powder is sent to a powder feeder online, and then enters the bottom of the casting mold cavity of the vertical casting machine as a bottom sealing material or a multi-flow bag for re-melting; the screened material is loaded into a bucket offline.

[0020] Compared with the prior art, the vertical casting machine, alloy iron granulation system and method of the present invention have achieved the following technical effects:

[0021] First, the pulverization rate is low: the ingot is lightly crushed and cracked by the indentation roller at high temperature to produce granular alloy, and the screened material is directly returned to the mold or multi-flow ladle for remelting online, so nearly 100% of the cast molten iron becomes qualified particles, solving the problem of high crushing and pulverization rate (5-20%) in the industry. Secondly, the molten iron recovery rate is high: the molten iron is mainly injected into the mold cavity in the slow displacement stage without any splash loss. During the rapid transfer, a small amount of splashed molten iron is collected by the annular top groove and flows into the mold, and the splash loss is very small. Therefore, the molten iron is nearly 100% converted into alloy ingots, solving the problem of serious splashing and more iron leakage from the machine head in the traditional casting technology, which leads to a low recovery rate of 2-5% molten iron loss. Thirdly, the unit product mold consumption cost is low: the high-temperature molten iron does not directly flush the mold wall, and is cast under the protection of the coating, so the mold life is long and the mold cost per unit product is low, which is more than 50% lower than the unit product mold cost of the currently used method. Fourth, the production efficiency is high: it takes less than 5 minutes from molten iron casting to product offline, which is several times higher than the traditional process of several hours to dozens of hours. The fifth is environmental protection and cleanliness: the molten iron is filled with a relatively stable small flow rate, and the smoke generated is small and easy to capture. The sixth is high automation, stable operation, multiple mold positions, and large load; the equipment is compact and occupies a small area, which is conducive to reducing plant investment, solving labor shortages, and realizing intelligent manufacturing and safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a flow chart of the alloy iron granulation method of the present invention;

[0024] Figure 2 The structure of the alloy iron granulation system of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 3 The structure of the alloy iron granulation system of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 4 for Figure 3 A top view of the alloy iron granulation system of the present invention is shown;

[0027] Figure 5 It is a cross-sectional view of the casting mold in the first embodiment of the alloy iron granulation system of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the bottom tank in the first embodiment of the alloy iron granulation system of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the variable speed drive in the first embodiment of the alloy iron granulation system of the present invention;

[0030] Figure 8 The structure of the granulator in the first embodiment of the alloy iron granulation system of the present invention is shown in FIG. Figure 1 ;

[0031] Fig. 9 It is a top view of the granulator in the first embodiment of the alloy iron granulation system of the present invention;

[0032] Fig.10 The schematic diagram of the structure of the pin wheel in the second embodiment of the alloy iron granulation system of the present invention is

[0033] Fig.11 It is a structural schematic diagram of the roller support in the second embodiment of the alloy iron granulation system of the present invention;

[0034] Fig.12 It is a cross-sectional view of the casting mold in the second embodiment of the alloy iron granulation system of the present invention;

[0035] Among them, 1-liquid level detector, 2-multi-flow package, 3-frame, 4-powder feeder, 5-vertical casting machine, 6-refractory material or alloy powder and graphite powder mixture, 5.1-vertical reciprocating motion mechanism, 5.1.1-cross bar, 5.1.2-roller group, 5.1.3-sliding bar, 5.1.4-spring vibration bar, 5.1.5-sprayer nozzle, 5.1.6-cross slider coupling, 5.1.7-bearing seat, 5.1.8-transmission shaft, 5.1.9-first inertia wheel, 5.1.10-connecting rod, 5.2-top groove, 5.3-casting mold platform, 5.4-casting mold, 5.5-bottom groove, 5.5.1-first fixed shaft, 5.5.2-bearing cover, 5.5.3-first bearing, 5.5.4-roller, 5.5.5- Sealing ring, 5.6-slewing bearing, 5.7-speed drive, 5.7.1-driving gear, 5.7.2-output shaft, 5.7.3-turntable, 5.7.4-needle bearing, 5.7.5-speed cam, 5.7.6-input shaft, 5.11-pin wheel, 5.11.1-panel, 5.11.2-pin column, 5.11.3-connecting plate, 5.11.4-bottom plate, 5.11.5-rib plate, 5.12-roller support, 5.12.1-support frame, 5.12.2-roller, 5.12.3-second fixed shaft, 5.12.4-pressure cover, 5.12.5-second bearing, 6.1-motor, 6.2-reduction gearbox, 6.3-second inertia wheel, 6.4-granulator frame, 6.5-indentation roller. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0037] The purpose of the present invention is to provide a vertical casting machine, a system and method for granulating molten alloy iron, so as to solve the problems existing in the prior art and improve the efficiency, molten iron yield and quality of granulating molten alloy iron.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment 1

[0040] like Figure 1-9 As shown, this embodiment provides a vertical casting machine 5, including a frame 3, a top tank 5.2, a casting mold platform 5.3, a casting mold 5.4, a bottom tank 5.5, a slewing bearing 5.6, a variable speed drive 5.7 and a vertical reciprocating motion mechanism 5.1.

[0041] Among them, the top groove 5.2 is an annular groove body arranged on the annular steel plate, the top groove 5.2 is coaxial with the annular steel plate, the annular steel plate is fixedly arranged on the top of the mold platform 5.3, the top groove 5.2 has a horizontal annular bottom plate, a large circular ring and a small circular ring on the bottom plate, the two circular rings are concentric, and the height is 50-500mm, and there are a plurality of first bolt holes on the circle with a diameter greater than the outer diameter of the large circular ring, the first bolt holes are used for long bolts to connect with the bottom plate of the mold platform 5.3 to press the mold 5.4, and there are a plurality of second bolt holes on the bottom plate with a diameter less than the inner diameter of the small circular ring, the second bolt holes are used for bolts to fix the top groove 5.2 to the flange on the top surface of the mold platform 5.3. The connection between the large and small rings and the horizontal bottom plate is provided with fillets or chamfers; 29-301 vertical through holes are opened on the bottom plate at the bottom of the groove (the specific number is consistent with the number of mold positions of the mold platform 5.3). In this embodiment, the size and shape of the vertical through holes are similar to the cross-section of the ingot (the molten iron flowing out of the direct current hole of the multi-flow package 2 enters the mold cavity 5.4 from the vertical through holes.

[0042] The mold platform 5.3 includes a top flange, a connecting plate and a bottom plate connected in sequence. The top flange has a plurality of bolt holes for fixing the top trough 5.2 on the mold platform 5.3; the bottom plate of the mold platform 5.3 has 29-301 first demoulding holes (the shape is similar to the cross section of the ingot and slightly larger, and the number is consistent with the number of mold digits), which are used as channels for the ingot to be separated from the mold 5.4. When in use, powder is added into the first demoulding holes to prevent the molten iron from leaking out and to protect the bottom trough 5.5; there are also a plurality of bolt holes on the bottom plate for fixing the mold platform 5.3 on the slewing bearing; the connecting plate is in the shape of a cylinder and is used to connect the top flange and the bottom plate of the mold platform 5.3, and the rib plate is welded to the barrel wall, the flange and the bottom plate.

[0043] A casting mold 5.4 is arranged on each first demoulding hole; the casting mold 5.4 is in the shape of a hollow oblate arc column, the cross section of the cavity is composed of four arcs R1, R2 and R3, R4 closed loops, the outer wall is also composed of four arcs R5, R6 and R7, R8 closed loops, the inner wall is smooth, the outer wall is smooth or there are heat dissipation plates staggered horizontally and vertically, the material is copper or steel or ductile iron, and it is installed at the demoulding hole position of the casting mold platform 5.3; the casting mold 5.4 is pressed on the bottom plate of the casting mold platform 5.3 by the top groove 5.2 through bolts.

[0044] The bottom groove 5.5 is fixed on the frame 3 by bolts, the top surface of the bottom groove 5.5 is slidably matched with the bottom plate of the mold platform 5.3, the top surface of the bottom groove 5.5 is provided with a circular groove, and the bottom of the bottom groove 5.5 is provided with a second demoulding hole communicated with the groove; the size of the second demoulding hole is not less than the outline size of the inner hole of the mold 5.4, a partition is provided in the groove, and refractory material or alloy powder and graphite powder mixture 6 are placed in the groove except for the position of the second demoulding hole; the function of the refractory material or alloy powder and graphite powder mixture 6 is to ensure that the molten iron in the mold 5.4 does not leak out; the graphite powder is used as a lubricant to reduce The first function of the supporting wheel assembly is to reduce the rotation resistance of the small mold platform 5.3, and to fill the gaps of the refractory material or alloy powder to increase the bulk density and ensure that the molten iron does not penetrate into the refractory material or alloy powder; there is a supporting wheel assembly in the groove, which includes a roller 5.5.4, a first bearing 5.5.3, a first fixed shaft 5.5.1, a bearing cover 5.5.2 and a sealing ring 5.5.5. The bearing cover 5.5.2 rotates with the first fixed shaft through a ball. The functions of the supporting wheel assembly are to keep the powder in the groove in a stationary state and not move with the rotation of the mold platform 5.3, and to assist the slewing bearing in vertically supporting the mold platform 5.3.

[0045] The slewing bearing 5.6 is fixed on the frame 3. A driven gear which is fixedly connected to the mold platform 5.3 and coaxial is arranged on the slewing bearing 5.6. The driven gear is horizontally meshed with the driving gear 5.7.1 in the speed change driver 5.7.

[0046] In this embodiment, the speed-changing driver 5.7 comprises an input shaft 5.7.6, a speed-changing cam 5.7.5, an output shaft 5.7.2, a rotating disc 5.7.3 and a driving gear 5.7.1. The speed-changing cam 5.7.5 is fixed on the input shaft 5.7.6, the rotating disc 5.7.3 and the driving gear 5.7.1 are fixed on the output shaft 5.7.2, the output shaft 5.7.2 is vertical, a plurality of needle bearings 5.7.4 are evenly arranged on the pitch circle of the rotating disc 5.7.3, the bottom surface of the rotating disc 5.7.3 is slightly higher than the upper edge of the wheel ridge of the speed-changing cam 5.7.5, and the rotating disc 5.7.3 is fixed on the output shaft 5.7.2. 5.7.3 has several pin holes for installing non-standard needle roller bearings 5.7.4; non-standard needle roller bearings 5.7.4 include pins, bearing outer rings and needle rollers, with threads on one end of the pin and bosses on the other end, and the length of the pin is greater than the sum of the length of the bearing outer ring and the thickness of the turntable 5.7.3; the pin is vertically installed in the pin hole of the turntable 5.7.3, with the pin threads facing upward and the upper surface of the pin wheel exposed for the installation of locking bolts; the outer ring of the needle roller bearing 5.7.4 is in rolling contact with the wheel ridge of the speed change cam 5.7.5, and one end of the input shaft 5.7.6 is connected to the external power transmission. Among them, the needle roller bearing 5.7.4 can also be horizontally installed on the outer circle of the turntable 5.7.3.

[0047] The speed-changing cam 5.7.5 is provided with a deformed sinusoidal wheel ridge and a helical wheel ridge with a constant lead angle, and the tangents of the deformed sinusoidal wheel ridge and the first and last points of the helical wheel ridge coincide with each other. The fast driving angle of the deformed sinusoidal wheel ridge corresponds to (30°-170°), and the slow driving angle of the helical wheel ridge corresponds to (330°-190°). Under the drive of the deformed sinusoidal wheel ridge, the mold platform 5.3 rotates first by accelerating and then by decelerating; under the drive of the helical wheel ridge, the mold platform 5.3 rotates at a uniform speed; the speeds in the acceleration and deceleration stages are greater than the speed of uniform rotation; each time the input shaft 5.7.6 rotates one circle, the mold platform 5.3 rotates in a "uniform speed-acceleration-deceleration" cycle. During the casting process of the casting device, when the molten iron stream flowing out of the direct flow holes of the fixed multi-flow package 2 is about to touch the mold wall of the mold 5.4 of the mold platform 5.3 which is rotating slowly and uniformly, the roller of the turntable 5.7.3 just moves to the starting point of the deformed sinusoidal wheel ridge of the cam, and the mold platform 5.3 is driven by the deformed sinusoidal wheel ridge to quickly rotate and transfer the next mold 5.4 to the casting station; after the rotation is completed, the roller of the turntable 5.7.3 moves to the starting point of the spiral wheel ridge, and the mold platform 5.3 is driven by the spiral wheel ridge to rotate slowly and uniformly, so that the liquid has sufficient time to fill the mold smoothly.

[0048] The vertical reciprocating motion mechanism 5.1 includes a transmission shaft 5.1.8 connected to the other end of the input shaft 5.7.6 through a cross slider coupling 5.1.6. The transmission shaft 5.1.8 is coaxial with the input shaft 5.7.6. The transmission shaft 5.1.8 is rotatably arranged in two rolling bearings. The two rolling bearings are arranged on a bearing seat 5.1.7. A first inertia wheel is arranged at one end of the transmission shaft 5.1.8 away from the input shaft 5.7.6. The rim of the first inertia wheel is connected to the connecting rod 5.1.10. The other end of the connecting rod 5.1.10 is connected to the sliding rod 5.1.3; the sliding rod 5.1.3 is vertical and is vertically positioned under the action of the two roller groups 5.1.2. The top of the sliding rod 5.1.3 is fixed with a cross bar 5.1.1, and the cross bar 5.1.1 is also fixed with a spring vibration rod 5.1.4 and a sprayer nozzle 5.1.5. The spring vibration rod 5.1.4 and the sprayer nozzle 5.1.5 are also vertically positioned by the two roller groups 5.1.2. The bottom of the nozzle is equipped with an atomizing nozzle. Every time the driver input shaft 5.7.6 rotates one circle, the inertia wheel drives the vertical reciprocating motion mechanism 5.1 to reciprocate up and down through the connecting rod. The height position of the spring vibration rod 5.1.4 and the nozzle in the vertical reciprocating mechanism 5.1 is directly above the mold 5.4 at the demoulding and spraying station; the mold 5.4 after casting is horizontally rotated 180°-355° to reach the demoulding station. When the mold 5.4 rotates to the demoulding station, because the bottom groove 5.5 at this position is the second demoulding hole, most of the ingots will automatically fall off through the second demoulding hole under the action of gravity, and a small number of abnormal ones will be separated from the mold 5.4 under the vibration of the spring vibration rod 5.1.4 that moves vertically up and down with the cross bar 5.1.1. The nozzle parallel to the spring vibration rod 5.1.4 also moves vertically up and down with the cross bar 5.1.1 at the same time, spraying paint on the inner mold wall surface of the mold 5.4. Since the input shaft 5.7.6 drives the vertical reciprocating mechanism 5.1 to move up and down linearly once and the mold platform 5.3 to rotate one mold position every time, the spray pipe and the spring vibration rod 5.1.4 will never interfere with the mold platform 5.3.

[0049] The present embodiment also provides an alloy iron granulation system, comprising a multi-flow ladle 2, a granulator, a sieving machine, a powder making machine, an elevator, a powder feeder 4 and the above-mentioned vertical casting machine 5, the multi-flow ladle 2 is arranged above the top groove 5.2 of the vertical casting machine 5, and there is a gap of 0-300mm between the multi-flow ladle 2 and the top groove 5.2, and a plurality of vertical direct current holes are arranged on the bottom surface of the multi-flow ladle 2, the axis of the direct current hole is coaxial with the casting mold 5.4, and the spacing between two adjacent direct current holes is equal to the spacing between two adjacent mold positions on the casting mold platform 5.3 corresponding to all their positions. The function of the multi-flow ladle 2 is to distribute the molten iron to several casting molds 5.4 at the same time and prevent the molten iron from splashing and losing when pouring out from the molten iron ladle. During use, there is always a certain height of molten iron in the cavity of the multi-flow ladle 2.

[0050] The vertical casting machine 5 , the granulating machine, the screening machine, the powder making machine, the elevator and the powder feeder 4 are connected in sequence, and the powder feeder 4 is arranged above the vertical casting machine 5 .

[0051] The granulator is composed of a motor 6.1, a reducer 6.2, a second inertia wheel 6.3, an indentation roller 6.5 and a granulator frame 6.4. The motor 6.1 and the reducer 6.2 are standard parts, and the granulator frame 6.4 is welded or cast with steel or steel; the indentation roller 6.5 is composed of an active roller and a passive roller, and is made of alloy steel or carbon steel. The roller skin surface is welded with convex nails in the longitudinal and transverse directions with wear-resistant cladding welding rods. The height of the convex nails is 0.5-50mm, and the distance between the convex nails is 10mm-300mm; the distance between the two indentation rollers is adjustable, and the minimum distance between the two rollers is 1-50mm less than the thickness of the ingot; the second inertia wheel 6.3 is made of cast steel or cast iron, and its purpose is to increase the rotation stability of the granulator. The sieving machine is installed on the bottom surface of the granulator, and the power is directly provided by the active shaft or driven shaft of the sieving machine. The alloy indented by the granulator falls directly into the sieving machine for sieving. The material on the sieve enters the finished product bin, and the material under the sieve enters the powder return device.

[0052] Powder return device: including a powder making machine and an elevator. The undersize material from the sieving machine (due to the large particle size, it does not meet the technical requirements for the base material) is directly fed to the powder making machine for powdering. After powdering, it is lifted by the elevator to the high-position powder feeder 4 for use. The powder making machine includes a motor, a reducer, a frame, an active roller and a passive roller. The active roller and the passive roller are smooth alloy rollers, and the distance between the roller surfaces is 0-3mm.

[0053] The alloy iron granulation system of this embodiment also includes two liquid level detectors 1, one liquid level detector 1 is installed directly above the multi-stream bag 2, and the other liquid level detector 1 is installed next to the multi-stream bag 2. Both liquid level detectors 1 are blue light laser liquid level detectors. Whether to continue to inject molten iron into the multi-stream bag 2 is determined according to the signals of the two liquid level detectors 1. When it is detected that the metal liquid level reaches the set scheduling, an electrical signal is output, and the winch motor of the auxiliary hook of the casting crane stops for 1-30 seconds.

[0054] The powder feeder 4 includes a storage bin and a feeder. The overflow chute at the top of the storage bin extends into the multi-flow bag 2. A gate valve is provided at the bottom of the storage bin, and the feeder is provided at the bottom of the storage bin. The powder feeder 4 is installed above the plane of the mold platform 5.3 and lags behind the spraying station by 1-30 mold positions. The storage bin is made of steel plate, and the cavity is inverted cone or inverted trapezoid. There is a powder overflow chute at the top, a manual gate valve at the bottom, and a feeder installed at the bottom. The primary function of the powder feeder 4 is to quantitatively spread a layer of powder consistent with the casting alloy material on the plane of the bottom trough 5.5 at the bottom of the mold 5.4, with a thickness of 1-200mm (the function of the powder is to prevent the bottom from leaking molten iron and protect the bottom inner wall of the mold 5.4); the second is to add the remaining powder from the bottom into the multi-flow bag 2. After the powder bin is full, the powder above flows directly into the multi-flow bag 2 through the chute to mix with the molten iron and melt.

[0055] The use process of the alloy iron granulation system in this embodiment is as follows:

[0056] After the power is turned on, the motor drives the reducer, and the output shaft 5.7.2 of the reducer drives the input shaft 5.7.6 of the speed change cam 5.7.5 driver. The input shaft 5.7.6 drives the vertical reciprocating motion mechanism 5.1 to make up and down reciprocating linear motion through the inertia wheel, and on the other hand, drives the needle bearing 5.7.4-turntable 5.7.3-output shaft 5.7.2-driving gear 5.7.1-slewing bearing (gear) through the speed change cam 5.7.5 to drive the mold platform 5.3 to make "uniform speed-acceleration-deceleration-uniform speed" periodic horizontal rotary motion. The working order of each device is as follows:

[0057] (1) Before starting the casting, first fill the groove of the bottom tank with refractory material or alloy powder and graphite mixture, then fill the coating tank and powder bin with spray paint and alloy powder respectively, open the relevant manual valve of the sprayer and the manual gate valve at the bottom of the powder feeder 4;

[0058] (2) The vertical casting machine 5 is started, and the powder feeder 4 and the sprayer automatically place a quantitative amount of sealing powder on the bottom of the cavity of the casting mold 5.4 and spray the coating on the inner wall of the casting mold 5.4;

[0059] (3) Start the crane's auxiliary hook winch and slowly pour molten iron into the multi-flow bag 2;

[0060] (4) The molten iron flows out simultaneously from the multiple vertical direct current holes at the bottom of the multi-flow ladle 2, passes through the vertical through holes on the bottom plate of the top trough 5.2, and is smoothly, evenly, and continuously injected into the cavities of the multiple casting molds 5.4 at the same time;

[0061] (5) When the liquid level detector 1 detects that the metal liquid level has reached the set height, the detector outputs an electrical signal and the auxiliary hook winch motor stops for 1-30 seconds;

[0062] (6) Demolding: After casting, the mold 5.4 rotates 180-355 degrees and reaches the demolding position. The ingot has been completely solidified and cooled to 600-1300°C. Most of the ingots are separated from the mold 5.4 through the second demolding hole of the bottom groove 5.5 under the action of gravity. A small number of abnormal ingots are demolded under the vibration of the spring vibration rod 5.1.4;

[0063] (7) Spraying paint: After demoulding, the spray pipe of the vertical linear reciprocating motion mechanism sprays paint on the surface of the mold wall of the mold cavity 5.4;

[0064] (8) Laying bottom powder: After spraying, the casting mold 5.4 continues to rotate forward to the powder feeder 4 station, and the powder feeder 4 quantitatively adds powder to the bottom of the casting mold 5.4 cavity;

[0065] (9) The casting mold 5.4 enters the next working cycle again;

[0066] (10) Granulation: The ingot after demoulding is immediately sent to the granulator for granulation.

[0067] (11) Screening: The particle size of the granulated alloy is in the range of 0-60mm. The screening machine separates the alloys that meet and do not meet the user's requirements.

[0068] (12) Bucket loading and powder processing: The material on the sieve is directly loaded into the bucket and stored in the warehouse, and the material under the sieve is crushed online into fine powder of 0-3mm, and then transported to the silo of the feeder through the return system.

[0069] This embodiment also provides a method for granulating molten iron based on the above-mentioned molten iron granulation system:

[0070] On the vertical casting machine 5 which performs "uniform speed-acceleration-deceleration-uniform speed" cycle horizontal rotation, the molten iron is continuously cast into arc flat ingots with a thickness of 30-200mm, a width of 50-1000mm and a length of 300-2000mm. The ingots are demoulded at a temperature of 600-1300℃ and then sent to a granulator for continuous crushing into 0-60mm granular alloys. The granular alloys are sieved by a sieving machine, and the undersize materials are crushed online and directly pulverized by a double-roller pulverizer, and then lifted to the powder feeder 4 by a hoist and enter the bottom of the casting mold 5.4 of the vertical casting machine 5 as a base material or a multi-flow bag 2 for re-melting, and the oversize materials are loaded into the bucket offline and put into the warehouse.

[0071] Embodiment 2

[0072] like Figure 10-12 As shown, this embodiment provides a vertical casting machine, alloy iron granulation system and method. Based on the first embodiment, the vertical casting machine, alloy iron granulation system and method of this embodiment are different from the vertical casting machine, alloy iron granulation system and method of the first embodiment only in the following points:

[0073] (1) The variable speed drive 5.7 in the vertical casting machine 5 comprises a worm gear, a turbine, an output shaft 5.7.2 and a driving gear 5.7.1. The turbine and the driving gear 5.7.1 are fixed on the output shaft 5.7.2. The output shaft 5.7.2 is vertical. The turbine is meshed with the worm gear. One end of the worm gear is connected to the output shaft of the reducer. The input shaft of the reducer is connected to the output shaft 5.7.2 of the servo motor. The vertical reciprocating motion mechanism 5.1 comprises a crankshaft connected to the other end of the worm gear through a cross slider coupling 5.1.6, the crankshaft is coaxial with the worm gear, one end of the crankshaft away from the input shaft 5.7.6 is connected to one end of a connecting rod, and the other end of the connecting rod is connected to a sliding bearing; a cross bar 5.1.1 is fixedly connected to the sliding bearing, and a spring vibration rod 5.1.4 and a sprayer nozzle 5.1.5 are also fixedly connected to the cross bar 5.1.1, and the spring vibration rod 5.1.4 and the sprayer nozzle 5.1.5 are respectively positioned vertically by two groups of roller groups 5.1.2.

[0074] (2) During use, the casting crane is used to cast molten iron, and the servo motor directly drives the casting device to cast molten iron; the height of the upper plane of the molten iron ladle on the casting device is higher than the height of the upper plane of the multi-stream ladle 2; the casting device includes a frame, a reducer, and a servo motor, and the installation position is in the same direction as the axis of the multi-stream ladle 2. The function of the casting device is to provide molten iron to the multi-stream ladle 2 at a constant speed (quantity); its speed control method is: the servo motor reducer unit directly drives the rotating shaft of the frame to rotate at a speed of 0.25-2 revolutions per hour, and the rotation speed in different time periods is determined by integrally calculating the volume per unit height of the molten iron liquid level in the molten iron ladle at different angles, ensuring that the amount of molten iron poured out per second is basically the same. A molten iron level laser measuring instrument (ultrasound and electrode probe, etc.) is installed directly above the mold platform 5.3. When the measured liquid level is equal to the set height, the servo motor stops for 1-10 seconds to ensure that the molten iron does not overflow the mold 5.4 and cause an accident.

[0075] (3) Replace the slewing bearing 5.6 with the pin wheel 5.11 and the roller support 5.12. The pin wheel 5.11 consists of a panel 5.11.1, a cylindrical pin 5.11.2, a connecting plate 5.11.3, a bottom plate 5.11.4 and a rib plate 5.11.5. Several cylindrical pin holes Φ6 are evenly drilled on the pitch circle Φ4 of the panel 5.11.1 and the bottom plate 5.11.4, and the cylindrical pin 5.11.2 is installed in the Φ6 hole. There are several through holes Φ8 on the Φ2 circumference of the upper wheel rim, which are used to fix the mold platform 5.3 on the pin wheel 5.11. The bottom surface of the lower wheel rim is an inclined surface or a plane, and the bottom surface and the outer circle are processed into a smooth plane and circumference respectively, which serve as the height and center positioning reference of the pin wheel 5.11. The roller support 5.12 comprises a support frame 5.12.1, a second fixed shaft 5.12.3, a second bearing 5.12.5, a gland 5.12.4 and a roller 5.12.2. There are at least three groups of roller supports 5.12, which are installed under the bottom plate 5.11.4 of the pin wheel 5.11 and are in rolling contact with the bottom plane of the bottom plate 5.11.4 of the pin wheel 5.11.

[0076] (4) Only one liquid level detector 1 is provided in the alloy iron granulation system, and it is located next to the multi-flow bag 2.

[0077] (5) The double-roller mill is replaced by a hammer mill or a ball mill.

[0078] In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present invention; the term "molten iron" refers to the high-temperature liquid alloy to be cast, and cannot be understood as molten iron for steelmaking or molten iron for cast iron. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0079] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A vertical casting machine, characterized in that: The invention comprises a frame, a top groove, a mold platform, a mold, a bottom groove, a rotation support part and a variable speed drive; the top groove is fixedly arranged at the top end of the mold platform, the top groove is a circular annular groove body, and a bottom plate of the top groove is provided with a plurality of vertical through holes corresponding to the mold positions on the mold platform; the mold platform comprises a top surface flange, a connecting plate and a bottom plate connected in sequence, and a plurality of first demolding holes corresponding to the mold positions on the mold platform are provided on the bottom plate of the mold platform, each of the first demolding holes is provided with a mold, and the mold is clamped between the top groove and the bottom plate of the mold platform; The bottom groove is fixed on the frame, the top surface of the bottom groove is slidably matched with the bottom plate of the mold platform, a circular groove is arranged on the top surface of the bottom groove, and a second demoulding hole communicating with the groove is arranged at the bottom of the bottom groove; the mold platform is rotatably connected with the frame through the rotating support part, and the variable speed drive can drive the mold platform to rotate; The casting mold is in the shape of a hollow oblate arc column, a hollow rectangular column, a hollow circular column, a hollow elliptical column or a hollow polygonal column; a partition plate, a supporting wheel group and powder are arranged in the groove of the bottom trough, and the supporting wheel group is in rolling contact with the bottom surface of the bottom plate of the vertical casting machine platform; the cross-section of the vertical through hole, the cross-section of the first demoulding hole and the cross-section of the second demoulding hole are all matched with the cross-section of the ingot; The speed-changing driver comprises an input shaft, a speed-changing cam, an output shaft, a turntable and a driving gear, wherein the speed-changing cam is fixed on the input shaft, the turntable and the driving gear are fixed on the output shaft, the output shaft is vertical, a plurality of needle bearings are evenly distributed on the turntable, each needle bearing is equidistant from the center of the turntable, the outer ring of the needle bearing is in rolling contact with the wheel ridge of the speed-changing cam, and one end of the input shaft is connected to the external power transmission; the speed-changing cam is provided with a deformed sinusoidal wheel ridge and a helical wheel ridge with a constant lead angle, the deformed sinusoidal wheel ridge coincides with the tangent of the first and last points of the helical wheel ridge; under the drive of the deformed sinusoidal wheel ridge, the casting mold platform rotates by first accelerating and then decelerating; under the drive of the helical wheel ridge, the casting mold platform rotates at a uniform speed; the speeds of the casting mold platform in the acceleration and deceleration stages are both greater than the speed of the uniform rotation of the casting mold platform.

2. The vertical casting machine according to claim 1, characterized in that: The variable speed drive includes a worm gear, a turbine, an output shaft and a driving gear. The turbine and the driving gear are fixed on the output shaft. The output shaft is vertical. The turbine is meshed with the worm gear. One end of the worm gear is connected to the output shaft of the reducer. The input shaft of the reducer is connected to the output shaft of the servo motor.

3. The vertical casting machine according to claim 1, characterized in that: It also includes a vertical reciprocating motion mechanism, which includes a horizontal transmission shaft driven by the input shaft of the variable speed drive and a bearing system supporting the rotation and positioning of the horizontal transmission shaft, a vertical slide rod driven by the horizontal transmission shaft, a cross bar driven by the vertical slide rod and arranged on the top of the vertical slide rod, and a spring vibration rod and a sprayer nozzle are also fixedly connected to the cross bar; the vertical slide rod is vertically positioned under the action of two groups of roller groups, and the spring vibration rod and the sprayer nozzle are respectively vertically positioned by the positioning mechanism.

4. The vertical casting machine according to claim 1, characterized in that: The rotating support part is a slewing bearing, on which a driven gear which is fixedly connected to and coaxial with the casting mold platform is arranged, and the driven gear is horizontally meshed with the driving gear in the speed-changing driver.

5. The vertical casting machine according to claim 1, characterized in that: The rotating support part includes a pin wheel and at least three roller supports, the mold platform is fixedly connected to the pin wheel; the roller support is fixed on the bracket; the bottom surface of the pin wheel is in rolling contact with the roller of the roller support.

6. A molten iron alloy granulation system, characterized in that: It comprises a multi-stream package, a granulator, a sieving machine, a powder making machine, an elevator, a powder feeder and a vertical casting machine as described in any one of claims 1 to 5, wherein the multi-stream package is arranged above the top groove of the vertical casting machine, and there is a gap between the multi-stream package and the top groove, and a plurality of vertical direct current holes are arranged on the bottom surface of the multi-stream package, and the direct current holes can be coaxial with the casting mold, and the spacing between two adjacent direct current holes is equal to the spacing between two adjacent mold positions on the casting mold platform; the vertical casting machine, the granulator, the sieving machine, the powder making machine, the elevator and the powder feeder are connected in sequence, and the powder feeder is arranged above the vertical casting machine, and the powder feeder comprises a storage bin and a feeder, and the overflow chute at the upper part of the storage bin extends into the multi-stream package, and a gate valve is arranged at the bottom of the storage bin, and the feeder is arranged at the bottom of the storage bin.

7. The molten iron alloy granulation system according to claim 6, characterized in that: It also includes a liquid level detector for detecting the liquid level of the molten iron in the multi-stream bag or the casting mold, and determines whether to increase, reduce or stop injecting molten iron into the multi-stream bag according to the signal of the liquid level detector.

8. The molten iron alloy granulation system according to claim 6, characterized in that: The granulator comprises a motor, a reducer, a driving roller, a passive roller and a granulator frame, the shaft of the motor drives the input shaft of the reducer, the output shaft of the reducer drives the driving roller to rotate, the driving roller and the passive roller are both rotatably arranged on the frame of the granulator, and the minimum distance between the roller surface of the driving roller and the roller surface of the passive roller is 1-50 mm smaller than the thickness of the ingot.

9. A method for granulating molten iron alloy, characterized in that: Based on the alloy molten iron granulation system described in any one of claims 6 to 8, the bottom of the mold is sealed with powder, and the molten iron is continuously cast into ingots on a vertical casting machine that performs circulating horizontal rotation; the ingots are demolded at a temperature of 600-1300°C, and after demolding, they are directly transported online to a granulator for continuous crushing into granular alloys; the granular alloys are transported online to a screening machine for screening; the screened material is directly crushed online into powder by a powder making machine; the powder is sent to a powder feeder online, and then enters the bottom of the casting mold cavity of the vertical casting machine as a bottom sealing material or a multi-flow bag for re-melting; the screened material is loaded into a bucket offline.

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