A process for preparing vanadium-nitrogen alloy for steelmaking

Abstract

The present invention relates to the technical field of steelmaking, and in particular to a process for preparing a vanadium-nitrogen alloy for steelmaking. The process comprises seven steps: feeding, batching, mixing, pressing, preheating and dehydration, carbonitriding, and cooling and carburizing. During the feeding process, a clamping claw assembly moves back and forth between two groups of conveyor belt assemblies b, thereby realizing the feeding of a storage bin and the output of packaging bags. During the batching process, in a material weighing bin, as the material in the weighing bin gradually increases to the bottom of a movable plate, a lifting assembly drives the movable plate to move upward synchronously with the increase of the material, and at the same time, a stirring unit rotates to spread the material evenly. After a tensile scale reaches a preset weight, an opening and closing unit and a switch mechanism are successively closed, and a switch mechanism at a discharge port b is opened, and the material in the corresponding weighing bin falls onto a conveyor belt assembly a. The conveyor belt assembly a delivers the material to a mixing device, thereby improving the feeding efficiency and solving the technical problem of inaccurate weighing in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of steelmaking, in particular to a process for preparing a vanadium-nitrogen alloy for steelmaking. Background Art

[0002] 80%-90% of vanadium is used in the steel industry, primarily because vanadium reacts with carbon and nitrogen to form refractory carbon and nitrides. These compounds act as precipitation hardeners and grain refiners in steel. Therefore, vanadium-nitrogen alloys composed of vanadium carbides and vanadium nitrides are playing an increasingly important role in the production of vanadium-containing steels. Vanadium-nitrogen alloys can be used in structural steels, tool steels, pipeline steels, rebar, general engineering steels, and cast iron. Existing research has shown that the addition of vanadium-nitrogen alloys to steel improves comprehensive mechanical properties such as wear resistance, corrosion resistance, toughness, strength, ductility, hardness, and thermal fatigue resistance. They also enhance weldability and help eliminate inclusion elongation. Directly adding vanadium-nitrogen alloys to low-alloy, high-strength steel offers several advantages over using ferrovanadium: more effective precipitation strengthening and grain refinement than ferrovanadium; 40% lower vanadium addition costs; and facilitating the comprehensive utilization of vanadium and nitrogen, significantly improving the overall mechanical properties of the steel. Vanadium-nitrogen alloyed rebar requires approximately 14% less steel than conventional rebar. Vanadium-nitrogen alloying has been widely used in non-quenched and tempered steel and thin slab continuous casting and rolling high-strength strip steel, and the combination of vanadium-nitrogen alloying and TMCP process has been applied in the production of high-strength H-beam in my country.

[0003] Chinese patent application number CN200910089322.7 discloses a method and apparatus for producing vanadium-nitrogen alloys, belonging to the field of ferroalloy production technology. Vanadium pentoxide powder, carbon powder, iron oxide powder, and a binder are mixed uniformly in a certain proportion and then pressed into pellets. The pellets are then placed in a medium-frequency induction shaft furnace and reacted at 1000-1700°C for 2-3 hours under a nitrogen atmosphere. The pellets are then removed from the furnace and cooled under nitrogen to produce a vanadium-nitrogen alloy product containing 76-81% V, 10-21% N, 1-9% C, and 1-2% Fe, with an apparent density of no less than 3.5 g / cm³. The apparatus of the present invention enables continuous, one-step production of vanadium-nitrogen alloys. Advantages include continuous production and high efficiency; low equipment investment in the production apparatus and a simple, compact process flow; and the high thermal efficiency of the induction shaft furnace, which allows for online temperature control to fully utilize the reaction heat, resulting in an energy-efficient and environmentally friendly process.

[0004] However, when the above device is in use, the weighing meter weighs the material falling into the silo. When the weighing meter reaches the preset weight, the material stops falling into the silo. At this time, the material between the silo outlet and the weighing meter that has not yet fallen onto the weighing meter will still fall onto the weighing meter and ultimately affect the weight ratio of the raw materials. Summary of the Invention

[0005] In response to the above problems, one of the purposes of the present invention is to address the shortcomings of the existing technology and provide a vanadium-nitrogen alloy preparation process for steelmaking, wherein the material enters the weighing bin through a feed hopper, and the weighing bin is provided with a movable plate which moves upward synchronously with the rise of the material therein, and the stirring rod under the movable plate spreads the material that falls into the weighing bin evenly. When the material in the weighing bin reaches the appropriate weight, the opening and closing unit blocks the feed hopper, thereby completing the weighing, thereby solving the technical problem of inaccurate weighing in the existing technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A process for preparing a vanadium-nitrogen alloy for steelmaking comprises the following steps:

[0008] Step 1: Loading: Place the bagged vanadium oxide, reducing agent, catalyst, and binder on the conveyor belt assembly b in sequence according to the position of the storage bin. The conveyor belt assembly b conveys the corresponding bagged raw materials to one side of the corresponding storage bin. Then, the crossbeam unit cooperates with the vertical beam unit to drive the gripper assembly to grab the bagged raw materials and move them to the top of the storage bin to contact the bag opening knife. The bagged raw materials are cut open and fall into the corresponding storage bin. Then, the gripper assembly sends the packaging bag to the conveyor belt assembly b on the other side, and then grabs the bagged raw materials on that side and repeats the above process. The packaging bag is sent away and collected during the subsequent transportation process.

[0009] Step 2: Batching. The material falls from the discharge port a into the feed hopper and enters the weighing bin through the feed hopper. As the material in the weighing bin gradually increases to the bottom of the movable plate, the lifting assembly drives the movable plate to move upward synchronously with the increase of the material. At the same time, the stirring unit rotates to spread the material evenly. The opening and closing unit and the switch mechanism are closed in turn. After weighing is completed, the switch mechanism at the discharge port b is opened, and the material in the corresponding weighing bin falls onto the conveyor belt assembly a and is transported to the downstream;

[0010] Step 3: Mixing: The mixing device mixes the materials evenly;

[0011] Step 4: Pressing: The pressing device presses the mixed material into blocks;

[0012] Step 5: Preheat and dehydrate, place the block material into the low temperature section of the push plate kiln device for heating;

[0013] Step 6: Carbonitriding: the material enters the high temperature section of the pusher kiln device for carbonitriding treatment;

[0014] Step 7: Cooling and nitriding. The material enters the cooling section of the push plate kiln device for cooling and nitriding.

[0015] As an improvement, in step one, the bag opening knife is arranged in a pyramid shape, with the cutting edge facing the conveyor belt components b on both sides. When the clamping claw component grabs the bagged raw materials and contacts the bag opening knife, its opening gradually increases.

[0016] As an improvement, in step one, when the bagged raw materials are opened by the bagging knife or after the bagging is opened, the crossbeam unit cooperates with the vertical beam unit to drive the bagged raw materials to perform interpolation movement.

[0017] As an improvement, in step one, when the clamping jaw assembly is opened, the cylinder b therein drives the grabbing rack to rotate upward, and several groups of shift rods on both sides are tilted downward; when the clamping jaw assembly grabs the material, the cylinder b drives the grabbing rack to rotate downward, and several groups of shift rods on both sides are rotated to the horizontal and support the bagged raw materials, while the resistance plate squeezes the bagged raw materials.

[0018] As an improvement, in step 2, during the process of feeding into the weighing bin, the stirring unit always keeps rotating, and the stirring rod in the stirring unit passes under the feeding hopper.

[0019] As an improvement, in step 2, the stirring rod is in contact with the lower surface of the movable plate, and at the same time, the stirring rod is close to the upper surface of the material in the weighing bin but does not contact it.

[0020] As an improvement, in step 2, the motor f in the lifting assembly drives the main shaft and the lead screw nut to rotate through the synchronous belt assembly and the adapter plate, thereby driving the lead screw and the movable plate to move up and down.

[0021] As an improvement, in step 2, the motor d in the opening and closing unit drives the rotating shaft b and the worm to rotate, thereby driving the worm wheel and the rotating plate to rotate, thereby realizing the opening and closing of the feed hopper outlet.

[0022] As an improvement, in step 2, the rotating plate rotates so that when the outlet of the feed hopper is closed, the upper plane of the material in the weighing bin and the material below the plane formed by several groups of the rotating plates are within the weighing tolerance.

[0023] As an improvement, in step 2, the cylinder a drives the baffle to rotate to open and close the discharge port a and the discharge port b.

[0024] Another object of the present invention is to overcome the above-mentioned defects and provide a vanadium-nitrogen alloy preparation device for steelmaking, which moves between two groups of conveyor belt components b and the storage bin through a clamping claw assembly. The clamping claw assembly sends the bagged raw materials on the conveyor belt component b to the storage bin to complete unpacking and loading, and then sends the packaging bags to the conveyor belt component b on the other side. Thereafter, the bagged raw materials on this side are grabbed and the above-mentioned loading process is repeated. The packaging bags are sent away and collected during the subsequent conveying process, which greatly improves the loading efficiency of the raw materials.

[0025] To achieve the above object, the present invention provides the following technical solutions:

[0026] A vanadium-nitrogen alloy preparation device for steelmaking includes a batching device, a mixing device, a pressing device, and a pusher kiln device arranged in sequence according to the process. The batching device includes:

[0027] Mounting rack;

[0028] Storage bins, several groups of which are arranged on the mounting frame, each of which is in the shape of a funnel with a larger top and a smaller bottom, with a feed port a at the top and two groups of discharge ports a at the bottom;

[0029] The weighing bin is arranged below the storage bin and is mounted on the mounting frame through a plurality of tension scales. The weighing bin is arranged in a funnel shape with a large top and a small bottom. The top of the bin is provided with a feed port b and the bottom is provided with a discharge port b;

[0030] A switch mechanism, the switch mechanism is correspondingly arranged at the discharge port a and the discharge port b, and controls the opening and closing of the discharge port a and the discharge port b;

[0031] A conveyor belt assembly a, wherein the conveyor belt assembly a is arranged below the plurality of groups of discharge ports b;

[0032] The feeding mechanism includes a truss bracket arranged on the outside of the mounting frame, a conveyor belt assembly b installed on the truss bracket and located on the left and right sides of the mounting frame, a crossbeam unit movably arranged on the truss bracket and corresponding to the storage bin one by one, a vertical beam unit correspondingly arranged on the crossbeam unit and movably arranged up, down, left and right, a clamping claw assembly arranged at the bottom of the vertical beam unit and reciprocating between the two groups of the conveyor belt assemblies b and the storage bin, and a bag opening knife arranged on the storage bin;

[0033] and a quantitative mechanism, the quantitative mechanism is arranged corresponding to the weighing bin, and includes a movable plate that moves up and down in the feed port b, lifting components distributed at the four corners of the weighing bin and installed on the mounting frame for driving the movable plate to move up and down, two groups of feed hoppers arranged on the movable plate and facing the discharge port a, an opening and closing unit arranged in the feed hopper to control the opening and closing of the feed hopper outlet, and a stirring unit arranged at the bottom of the movable plate, the movable plate moves up as the material in the weighing bin increases and does not conflict with the raw materials;

[0034] The conveyor belt assembly b transports the corresponding bagged raw materials to the corresponding side of the storage bin, and then the crossbeam unit cooperates with the vertical beam unit to drive the clamping claw assembly to grab the bagged raw materials and move them above the storage bin to contact the bag opening knife. The bagged raw materials are cut open and fall into the storage bin. Then the clamping claw assembly sends the packaging bag to the conveyor belt assembly b on the other side, and then grabs the bagged raw materials on this side and repeats the above-mentioned loading process. The packaging bag is sent away and collected during the subsequent conveying process.

[0035] As an improvement, the switch mechanism includes a rotatable baffle and a cylinder a whose end is rotatable and whose power output end is hinged to the baffle.

[0036] As an improvement, the beam unit includes a beam body, a slide plate a arranged at both ends of the beam body and connected to the truss support through roller guide rails, a motor a correspondingly arranged on the slide plate a, and a gear rack transmission assembly a that dynamically connects the motor a and the truss support.

[0037] As an improvement, the vertical beam unit includes a slide plate b connected to the cross beam body through a roller guide rail, a mounting seat arranged on the slide plate b, a vertical beam body mounted on the mounting seat through a roller guide rail, a motor b mounted on the slide plate b, a gear rack transmission assembly b that dynamically connects the motor b and the cross beam body, a motor c mounted on the mounting seat, and a gear rack transmission assembly c that dynamically connects the motor c and the vertical beam body.

[0038] As an improvement, the gripper assembly includes a bracket, a rotating shaft a symmetrically installed below the bracket, a grabbing frame correspondingly installed on the rotating shaft a, several groups of shift rods arrayed below the grabbing frame, a contact plate installed on the grabbing frame and located above several groups of shift rods, and a cylinder b rotatably installed on the bracket and with its power output end hinged to the grabbing frame.

[0039] As an improvement, the bag opening knife is arranged in a pyramid shape, and the cutting edge faces the conveyor belt components b on both sides.

[0040] As an improvement, the lifting assembly includes a mounting plate arranged on the mounting frame, a main shaft arranged on the mounting plate, a lead screw nut installed on the main shaft, an adapter plate connected to the main shaft, a mounting table arranged on the mounting plate, a motor f arranged on the mounting table, a synchronous belt assembly for power connection between the motor f and the adapter plate, a lead screw that cooperates with the lead screw nut and has its bottom fixed to the movable plate, two sets of linear bearings arranged on both sides of the main shaft, and an optical axis that slides through the linear bearings and is fixedly connected to the movable plate.

[0041] As an improvement, the opening and closing unit includes several groups of rotating plates rotatably arranged at the bottom of the feed hopper, a worm gear coaxially arranged with the rotating plate, a rotating shaft b rotatably mounted on the movable plate, a worm coaxially mounted on the rotating shaft b and cooperating with the worm gear, and a motor d connected to the rotating shaft b through a coupling.

[0042] As an improvement, the stirring unit includes a motor e arranged above the movable plate, a mounting sleeve arranged below the movable plate and mounted on the rotating shaft of the motor e, and a plurality of groups of stirring rods arranged in a circular array outside the mounting sleeve.

[0043] As an improvement, the mounting sleeve and the plurality of groups of stirring rods are arranged in contact with the lower surface of the movable plate.

[0044] The beneficial effects of the present invention are:

[0045] (1) The material of the present invention enters the weighing bin through the feed hopper, and the weighing bin is provided with a movable plate that moves upward synchronously with the rise of the material therein. The stirring rod below the movable plate will drop the material into the weighing bin to spread it evenly, and the stirring rod will not generate pressure on the upper surface of the material. When the material in the weighing bin reaches the appropriate weight, the opening and closing unit blocks the feed hopper, thereby completing the weighing, making the weighing of the material more accurate;

[0046] (2) In the present invention, the clamping claw assembly moves between the two groups of conveyor belt assemblies b and the storage bin, and the clamping claw assembly delivers the bagged raw materials on the conveyor belt assembly b to the storage bin to complete the unpacking and loading, and then delivers the packaging bag to the conveyor belt assembly b on the other side, and then grabs the bagged raw materials on that side and repeats the above-mentioned loading process. The packaging bag is sent away and collected during the subsequent conveying process, which greatly improves the efficiency of raw material loading and can collect the packaging bag at the same time;

[0047] (3) The bag opening knife in the present invention is arranged in a pyramid shape, and the cutting edge faces the conveyor belt assembly b on both sides. When the clamping claw assembly grabs the bagged raw materials and contacts the bag opening knife, its opening gradually increases, further improving the feeding efficiency;

[0048] (4) In the present invention, the crossbeam body can move forward and backward, the vertical beam body can move up and down, and the vertical beam body can also move left and right under the action of the slide plate b, so that the clamping claw assembly can be interpolated and moved, so that when the bagged raw materials are opened, the incisions of the bagging knife are more diverse, thereby improving the opening efficiency and the blanking efficiency; when the bagged raw materials are blanked, the differential movement can be used to shake the materials, thereby improving the blanking efficiency and preventing the residual materials;

[0049] (5) In the present invention, the simultaneous rotation of several groups of rotating plates allows the discharge port of the feed hopper to be quickly blocked, and at the same time, the blocking of the switch mechanism causes the discharge port a to be closed. At this time, the material that has fallen from the discharge port a will be temporarily stored in the feed hopper, and the weight of the material that falls from the feed hopper into the weighing bin during the rotation of the rotating plates is within the tolerance range, thereby making the weighing more accurate;

[0050] (6) In the present invention, after the rotating plate rotates to close the feed hopper, the lifting assembly drives the movable plate to move upward, thereby moving the movable plate away from the material in the weighing bin, further improving the accuracy of weighing.

[0051] In summary, the present invention has the advantages of simple structure, high raw material feeding efficiency and more accurate weighing ratio, and is particularly suitable for the field of steelmaking technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a process flow chart of the present invention;

[0053] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0054] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0055] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0056] Figure 5 It is a schematic diagram of the overall structure of the storage bin and weighing bin;

[0057] Figure 6 Schematic diagram of the storage silo structure;

[0058] Figure 7 It is a schematic diagram of the weighing bin structure;

[0059] Figure 8 Cross-sectional structural diagram of the weighing bin Figure 1 ;

[0060] Figure 9 Cross-sectional structural diagram of the weighing bin Figure 2 ;

[0061] Figure 10 for Figure 9 Enlarged view of point C in the middle;

[0062] Figure 11 It is a cross-sectional view of the lifting assembly;

[0063] Figure 12 Schematic diagram of the gripper assembly;

[0064] Figure 13This is the working status diagram of the gripper assembly.

[0065] In the figure: 1. Batching device, 11. Mounting frame, 12. Storage bin, 121. Feed port a, 122. Discharge port a, 13. Weighing bin, 131. Tension scale, 132. Feed port b, 133. Discharge port b, 14. Switch mechanism, 141. Baffle, 142. Cylinder a, 15. Conveyor belt assembly a, 16. Quantitative mechanism, 161. Moving plate, 162. Lifting assembly, 1621. Installation Mounting plate, 1622, spindle, 1623, screw nut, 1624, adapter plate, 1625, mounting table, 1626, motor f, 1627, synchronous belt assembly, 1628, screw, 1629, linear bearing, 16210, optical axis, 163, feed hopper, 164, opening and closing unit, 1641, rotating plate, 1642, worm gear, 1643, rotating shaft b, 1644, worm, 16 45, motor d, 165, stirring unit, 1651, motor e, 1652, mounting sleeve, 1653, stirring rod, 17, feeding mechanism, 171, truss bracket, 172, conveyor belt assembly b, 173, beam unit, 1731, beam body, 1732, slide plate a, 1733, motor a, 1734, gear rack drive assembly a, 174, vertical beam unit, 1741, slide Table b, 1742, mounting base, 1743, vertical beam body, 1744, motor b, 1745, rack and pinion transmission assembly b, 1746, motor c, 1747, rack and pinion transmission assembly c, 175, clamping jaw assembly, 1751, bracket, 1752, rotating shaft a, 1753, grabbing rack, 1754, shifting rod, 1755, contact plate, 1756, cylinder b, 176, bag opening knife. DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying 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 efforts are within the scope of protection of the present invention.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0069] Example 1:

[0070] like Figure 1 As shown, a process for preparing vanadium-nitrogen alloy for steelmaking comprises the following steps:

[0071] Step 1: Loading, placing the bagged vanadium oxide, reducing agent, catalyst, and binder on the conveyor belt assembly b172 in sequence according to the position of the storage bin 12, and the conveyor belt assembly b172 conveys the corresponding bagged raw materials to the corresponding side of the storage bin 12, and then the crossbeam unit 173 cooperates with the vertical beam unit 174 to drive the clamping claw assembly 175 to grab the bagged raw materials and move them to the top of the storage bin 12 to contact the bag opening knife 176, the bagged raw materials are cut open, and the raw materials fall into the corresponding storage bin 12, and then the clamping claw assembly 175 sends the packaging bag to the conveyor belt assembly b172 on the other side, and then grabs the bagged raw materials on this side and repeats the above process. The packaging bag is sent away and collected during the subsequent transportation process;

[0072] Step 2: Batching. The material falls from the discharge port a122 into the feed hopper 163 and enters the weighing bin 13 through the feed hopper 163. As the material in the weighing bin 13 gradually increases to the bottom of the movable plate 161, the lifting component 162 drives the movable plate 161 to move upward synchronously with the increase of the material. At the same time, the stirring unit 165 rotates to spread the material evenly. The opening and closing unit 164 and the switch mechanism 14 are closed successively. After the weighing is completed, the switch mechanism 14 at the discharge port b133 is opened, and the material in the corresponding weighing bin 13 falls onto the conveyor belt component a15 and is transported to the downstream;

[0073] Step 3: Mixing: The mixing device mixes the materials evenly;

[0074] Step 4: Pressing: The pressing device presses the mixed material into blocks;

[0075] Step 5: Preheat and dehydrate, place the block material into the low temperature section of the push plate kiln device for heating;

[0076] Step 6: Carbonitriding: the material enters the high temperature section of the pusher kiln device for carbonitriding treatment;

[0077] Step 7: Cooling and nitriding. The material enters the cooling section of the push plate kiln device for cooling and nitriding.

[0078] It should be noted that, in step 4, the pressure of the pressing device is 10-30 MPa.

[0079] It should be noted that, in step five, the heating temperature is 400-800° C., and the heating time is 4-8 hours.

[0080] It should be noted that, in step six, the heating temperature is 800-1450° C., and the heating time is 10-15 hours.

[0081] It should be noted that, in step seven, the temperature is controlled at 1450-1300° C. for 3-7 hours.

[0082] Furthermore, in step one, the bag opening knife 176 is arranged in a pyramid shape, with the cutting edge facing the conveyor belt components b172 on both sides. When the clamping claw component 175 grabs the bagged raw materials and contacts the bag opening knife 176, its opening gradually increases.

[0083] Furthermore, in step 1, when the bagged raw materials are opened by the bagging knife 176 or after the bagging is opened, the cross beam unit 173 cooperates with the vertical beam unit 174 to drive the bagged raw materials to perform interpolation movement.

[0084] Furthermore, in step one, when the clamping jaw assembly 175 is opened, the cylinder b1756 therein drives the grabbing frame 1753 to rotate upward, and several groups of shift rods 1754 on both sides are tilted downward; when the clamping jaw assembly 175 grabs the material, the cylinder b1756 drives the grabbing frame 1753 to rotate downward, and several groups of shift rods 1754 on both sides are rotated to a horizontal position and support the bagged raw materials, while the resistance plate 1755 squeezes the bagged raw materials.

[0085] Furthermore, in step 2, during the feeding process in the weighing bin 13 , the stirring unit 165 always keeps rotating, and the stirring rod 1653 in the stirring unit 165 passes under the feeding hopper 163 .

[0086] Furthermore, in step 2, the stirring rod 1653 is in contact with the lower surface of the movable plate 161 , and at the same time, the stirring rod 1653 is close to the upper surface of the material in the weighing bin 13 but does not contact it.

[0087] Furthermore, in step 2, the motor f1626 in the lifting assembly 162 drives the main shaft 1622 and the screw nut 1623 to rotate through the synchronous belt assembly 1627 and the adapter plate 1624, thereby driving the screw 1628 and the movable plate 161 to move up and down.

[0088] Furthermore, in step 2, the motor d1645 in the opening and closing unit 164 drives the rotating shaft b1643 and the worm 1644 to rotate, thereby driving the worm wheel 1642 and the rotating plate 1641 to rotate, thereby realizing the opening and closing of the outlet of the feed hopper 163.

[0089] Furthermore, in step 2, the rotating plate 1641 rotates so that when the outlet of the feed hopper 163 is closed, the upper plane of the material in the weighing bin 13 and the material below the plane formed by the plurality of groups of rotating plates 1641 are within the weighing tolerance.

[0090] Furthermore, in step 2, the cylinder a142 drives the baffle 141 to rotate, thereby opening and closing the discharge port a122 and the discharge port b133.

[0091] Example 2:

[0092] like Figure 2 and Figure 5 As shown, a vanadium-nitrogen alloy preparation device for steelmaking includes a batching device 1, a mixing device, a pressing device, and a pusher kiln device arranged in sequence according to the process. The batching device 1 includes:

[0093] Mounting frame 11;

[0094] Storage bins 12, several groups of the storage bins 12 are arranged on the mounting frame 11, and the storage bins 12 are arranged in a funnel shape with a large top and a small bottom, with a feed port a121 at the top and two groups of discharge ports a122 at the bottom;

[0095] The weighing bin 13 is correspondingly arranged below the storage bin 12 and is mounted on the mounting frame 11 through a plurality of tension scales 131. The weighing bin 13 is arranged in a funnel shape with a larger top and a smaller bottom. The top of the bin is provided with a feed port b132 and the bottom is provided with a discharge port b133.

[0096] A switch mechanism 14, which is correspondingly arranged at the discharge port a122 and the discharge port b133, and controls the opening and closing of the discharge port a122 and the discharge port b133;

[0097] The conveyor belt assembly a15 is disposed below the plurality of discharge ports b133;

[0098] The feeding mechanism 17 includes a truss bracket 171 provided on the outside of the mounting frame 11, a conveyor belt assembly b172 installed on the truss bracket 171 and located on the left and right sides of the mounting frame 11, a crossbeam unit 173 movably provided on the truss bracket 171 and corresponding to the storage bin 12, a vertical beam unit 174 correspondingly provided on the crossbeam unit 173 and movably provided up, down, left and right, a clamping claw assembly 175 provided at the bottom of the vertical beam unit 174 and reciprocating between the two groups of the conveyor belt assemblies b172 and the storage bin 12, and a bagging knife 176 provided on the storage bin 12;

[0099] and a quantitative mechanism 16, the quantitative mechanism 16 being arranged corresponding to the weighing bin 13, comprising a movable plate 161 that moves up and down in the feed port b132, a lifting assembly 162 distributed at the four corners of the weighing bin 13 and mounted on the mounting frame 11 for driving the movable plate 161 to move up and down, two sets of feed hoppers 163 arranged on the movable plate 161 and facing the discharge port a122, an opening and closing unit 164 arranged in the feed hopper 163 for controlling the opening and closing of the outlet of the feed hopper 163, and a stirring unit 165 arranged at the bottom of the movable plate 161, the movable plate 161 moves upward as the material in the weighing bin 13 increases and does not conflict with the raw materials;

[0100] The conveyor belt assembly b172 transports the corresponding bagged raw materials to the corresponding side of the storage bin 12, and then the crossbeam unit 173 cooperates with the vertical beam unit 174 to drive the clamping claw assembly 175 to grab the bagged raw materials and move them above the storage bin 12 to contact the bag opening knife 176. The bagged raw materials are cut open and fall into the storage bin 12. Then the clamping claw assembly 175 sends the packaging bag to the conveyor belt assembly b172 on the other side, and then grabs the bagged raw materials on this side and repeats the above-mentioned loading process. The packaging bag is sent away and collected during the subsequent conveying process.

[0101] It should be noted that the batching device 1, the pressing device 3 and the push plate kiln device 4 are all existing technologies and will not be described in detail in the present invention.

[0102] Further, such as Figure 6 and Figure 7 The switch mechanism 14 includes a rotatable baffle 141 and a cylinder a142 whose end is rotatable and whose power output end is hinged to the baffle 141.

[0103] It should be noted that the cylinder a142 drives the baffle 141 to move so as to quickly block the discharge port b133 and the discharge port a122.

[0104] Further, such as Figure 3 and Figure 4 As shown, the beam unit 173 includes a beam body 1731, a slide plate a1732 arranged at both ends of the beam body 1731 and connected to the truss support 171 through a roller guide rail, a motor a1733 correspondingly arranged on the slide plate a1732, and a gear rack transmission assembly a1734 that dynamically connects the motor a1733 and the truss support 171.

[0105] It should be noted that the motor a1733 is a Mitsubishi brand servo motor and needs to be used in conjunction with a reducer. The rack in the rack and pinion transmission assembly a1734 is installed on the truss bracket 171, and the gear is connected to the motor a1733 in power.

[0106] Further, such as Figure 3 and Figure 4 As shown, the vertical beam unit 174 includes a slide plate b1741 connected to the cross beam body 1731 through a roller guide rail, a mounting seat 1742 arranged on the slide plate b1741, a vertical beam body 1743 mounted on the mounting seat 1742 through a roller guide rail, a motor b1744 mounted on the slide plate b1741, a gear rack transmission assembly b1745 that dynamically connects the motor b1744 and the cross beam body 1731, a motor c1746 mounted on the mounting seat 1742, and a gear rack transmission assembly c1747 that dynamically connects the motor c1746 and the vertical beam body 1743.

[0107] It should be noted that the motor b1744 and the motor c1746 are both Mitsubishi brand servo motors and need to be used with a reducer; the rack in the gear rack transmission assembly b1745 is installed on the crossbeam body 1731, and the gear is connected to the power of the motor b1744; the rack in the gear rack transmission assembly c1747 is installed on the vertical beam body 1743, and the gear is connected to the power of the motor c1746.

[0108] It is also necessary to explain that, under the joint driving action of the motor a1733, the motor b1744 and the motor c1746, the motion path of the clamping jaw assembly 175 becomes more diverse and consistent with the interpolation motion in the CNC machine tool.

[0109] Further, such as Figure 12 and Figure 13As shown, the clamping jaw assembly 175 includes a bracket 1751, a rotating shaft a1752 symmetrically installed below the bracket 1751, a grabbing frame 1753 correspondingly installed on the rotating shaft a1752, a plurality of groups of shift rods 1754 arrayed below the grabbing frame 1753, a resistance plate 1755 installed on the grabbing frame 1753 and located above the plurality of groups of shift rods 1754, and a cylinder b1756 rotatably installed on the bracket 1751 and with a power output end hinged to the grabbing frame 1753.

[0110] It should be noted that when grabbing materials, the cylinder b1756 drives the grabbing frame 1753 to rotate, and when the lever 1754 is inserted into the bagged raw materials, the resistance plate 1755 resists the side of the bagged raw materials; when discharging materials, the cylinder b1756 drives the grabbing frame 1753 to rotate, so that the lever 1754 is facing downward, and the packaging bag can fall smoothly.

[0111] What needs to be explained more is that Figure 5 and Figure 6 As shown, when the bag opening knife 176 contacts the bagged raw materials, the bagged raw materials have their own weight and contact the contact plate 1755, so the bagged raw materials will not move; when the clamping jaw assembly 175 is moving, the two ends of the clamping jaw assembly 175 in the length direction are unobstructed, but the length direction distance is long, so the packaging bag will not leave the clamping jaw assembly 175 as the raw materials inside it decrease and become lighter, thereby ensuring that the external packaging bag will not fall in the process of ensuring the raw materials fall, and can meet the various paths of the clamping jaw assembly 175.

[0112] Further, such as Figure 5 and Figure 6 As shown, the package opening knife 176 is arranged in a pyramid shape, and the cutting edge faces the conveyor belt components b172 on both sides.

[0113] It should be noted that when the clamping claw assembly 175 grabs the bagged raw materials and contacts the bag opening knife 176, its opening gradually increases, which is conducive to the falling of the raw materials in the packaging bag.

[0114] Further, such as Figure 7 and Figure 11As shown, the lifting assembly 162 includes a mounting plate 1621 arranged on the mounting frame 11, a main shaft 1622 arranged on the mounting plate 1621, a lead screw nut 1623 installed on the main shaft 1622, an adapter plate 1624 connected to the main shaft 1622, a mounting platform 1625 arranged on the mounting plate 1621, a motor f1626 arranged on the mounting platform 1625, a synchronous belt assembly 1627 for power connection between the motor f1626 and the adapter plate 1624, a lead screw 1628 cooperated with the lead screw nut 1623 and fixed to the movable plate 161 at the bottom, two sets of linear bearings 1629 arranged on both sides of the main shaft 1622, and an optical axis 16210 slidably passed through the linear bearing 1629 and fixedly connected to the movable plate 161.

[0115] It should be noted that the motor f1626 is a Mitsubishi brand servo motor. The motor f1626 drives the adapter plate 1624, the main shaft 1622 and the screw nut 1623 to rotate through the synchronous belt assembly 1627, and then drives the screw 1628 and the movable plate 161 to move. The cooperation between the linear bearing 1629 and the optical axis 16210 makes the movement of the movable plate 161 more stable.

[0116] Further, such as Figures 7 to 9 As shown, the opening and closing unit 164 includes several groups of rotating plates 1641 rotatably arranged at the bottom of the feed hopper 163, a worm gear 1642 coaxially arranged with the rotating plate 1641, a rotating shaft b1643 rotatably installed on the movable plate 161, a worm 1644 coaxially installed on the rotating shaft b1643 and cooperating with the worm gear 1642, and a motor d1645 connected to the rotating shaft b1643 through a coupling.

[0117] It should be noted that the motor d1645 is a Mitsubishi brand servo motor. The motor d1645 drives the rotating shaft b1643 and the worm 1644 to rotate, thereby driving the worm wheel 1642 and the rotating plate 1641 to rotate. The discharge port of the feed hopper 163 is closed by several groups of rotating plates 1641, thereby shortening the closing time of the discharge port of the feed hopper 163, ensuring that the amount of material entering the weighing bin 13 after the weighing is completed is as little as possible.

[0118] Further, such as Figures 8 to 10 As shown, the stirring unit 165 includes a motor e1651 arranged above the movable plate 161, a mounting sleeve 1652 arranged below the movable plate 161 and mounted on the rotating shaft of the motor e1651, and a plurality of groups of stirring rods 1653 arranged in a circular array on the outside of the mounting sleeve 1652.

[0119] Furthermore, the mounting sleeve 1652 and the plurality of stirring rods 1653 are arranged in contact with the lower surface of the movable plate 161 .

[0120] It should be noted that the motor e1651 is a reduction motor. When the stirring rod 1653 rotates, it passes under the discharge port of the feed hopper 163, thereby spreading the material entering the weighing bin 13 to prevent it from piling up in the middle during feeding.

[0121] It should be further explained that the stirring rod 1653 is arranged close to the upper surface of the material in the weighing bin 13 but does not generate pressure with the material.

[0122] It is particularly important to note that Figure 9 As shown, the mounting sleeve 1652 and several groups of stirring rods 1653 are arranged in contact with the lower surface of the movable plate 161, which can further reduce the amount of material entering the weighing bin 13 after weighing is completed, thereby ensuring that the material weight is within the tolerance range.

[0123] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A process for preparing vanadium-nitrogen alloy for steelmaking, characterized in that: The following steps are involved: Step 1: Loading, placing the bagged vanadium oxide, reducing agent, catalyst, and binder on the conveyor belt assembly b (172) in sequence according to the position of the storage bin (12), and the conveyor belt assembly b (172) conveys the corresponding bagged raw materials to the corresponding side of the storage bin (12), and then the crossbeam unit (173) cooperates with the vertical beam unit (174) to drive the clamping claw assembly (175) to grab the bagged raw materials and move them to the top of the storage bin (12) to contact the bag opening knife (176), and the bagged raw materials are cut open and fall into the corresponding storage bin (12), and then the clamping claw assembly (175) sends the packaging bag to the conveyor belt assembly b (172) on the other side, and then grabs the bagged raw materials on this side and repeats the above process, and the packaging bag is sent away and collected in the subsequent transportation process; Step 2: batching. The material falls from the discharge port a (122) provided at the bottom of the storage bin (12) into the feed hopper (163) and enters the weighing bin (13) through the feed hopper (163). The top of the weighing bin (13) is provided with a feed port b (132) for feeding the material. A movable plate (161) that moves up and down is provided in the feed port b (132). As the material in the weighing bin (13) gradually increases to the bottom of the movable plate (161), the lifting components (162) provided at the four corners of the weighing bin (13) drive the movable plate (161) to move upward synchronously with the increase of the material in the weighing bin (13). The stirring unit (165) provided at the bottom of the movable plate (161) always keeps rotating. The stirring rod (1653) in the stirring unit (165) passes under the feed hopper (163) to spread the material entering the weighing bin (13). Spread evenly to prevent the material from piling up in the middle during feeding. The stirring rod (1653) is arranged in contact with the lower surface of the movable plate (161). The stirring rod (1653) is arranged close to the upper surface of the material in the weighing bin (13) but does not generate pressure with the material. The opening and closing unit (164) arranged in the feed hopper (163) and the switch mechanism (14) arranged at the discharge port a (122) are closed successively. The rotating plate (1641) in the opening and closing unit (164) rotates to close the feed hopper. The lifting component (162) drives the movable plate (161) to move upward, thereby moving the movable plate (161) away from the material in the weighing bin (13). After weighing is completed, the switch mechanism (14) at the discharge port b (133) arranged at the bottom of the weighing bin (13) is opened, and the material in the weighing bin (13) falls onto the conveyor belt component a (15) and is transported to the subsequent process. Step 3: Mixing: The mixing device mixes the materials evenly; Step 4: Pressing: The pressing device presses the mixed material into blocks; Step 5: Preheat and dehydrate, place the block material into the low temperature section of the push plate kiln device for heating; Step 6: Carbonitriding: the material enters the high temperature section of the pusher kiln device for carbonitriding treatment; Step 7: Cooling and nitriding. The material enters the cooling section of the push plate kiln device for cooling and nitriding.

2. The process for preparing a vanadium-nitrogen alloy for steelmaking according to claim 1, wherein: In step one, the bag opening knife (176) is arranged in a pyramidal shape, with the cutting edge facing the conveyor belt components b (172) on both sides. When the clamping claw component (175) grabs the bagged raw materials and contacts the bag opening knife (176), its opening gradually increases.

3. The process for preparing a vanadium-nitrogen alloy for steelmaking according to claim 1, wherein: In step one, when the bagged raw materials are opened by the bagging knife (176) or after the bagging is opened, the crossbeam unit (173) cooperates with the vertical beam unit (174) to drive the bagged raw materials to perform interpolation movement.

4. The process for preparing a vanadium-nitrogen alloy for steelmaking according to claim 1, wherein: In step 1, when the clamping jaw assembly (175) is opened, the cylinder b (1756) therein drives the grabbing frame (1753) to rotate upward, and the multiple groups of shifting rods (1754) on both sides are tilted downward; when the clamping jaw assembly (175) grabs the material, the cylinder b (1756) drives the grabbing frame (1753) to rotate downward, and the multiple groups of shifting rods (1754) on both sides are rotated to the horizontal level and support the bagged raw materials, while the contact plate (1755) squeezes the bagged raw materials.

5. The process for preparing a vanadium-nitrogen alloy for steelmaking according to claim 1, wherein: In step 2, the motor f (1626) in the lifting assembly (162) drives the main shaft (1622) and the lead screw nut (1623) to rotate through the synchronous belt assembly (1627) and the adapter plate (1624), thereby driving the lead screw (1628) and the movable plate (161) to move up and down.

6. The process for preparing a vanadium-nitrogen alloy for steelmaking according to claim 1, wherein: In step 2, the motor d (1645) in the opening and closing unit (164) drives the rotating shaft b (1643) and the worm (1644) to rotate, thereby driving the worm wheel (1642) and the rotating plate (1641) to rotate, thereby realizing the opening and closing of the outlet of the feed hopper (163).

7. The process for preparing a vanadium-nitrogen alloy for steelmaking according to claim 1, wherein: In step 2, the rotating plate (1641) rotates so that when the outlet of the feed hopper (163) is closed, the upper plane of the material in the weighing bin (13) and the material below the plane formed by the plurality of groups of rotating plates (1641) are within the weighing tolerance.

8. The process for preparing a vanadium-nitrogen alloy for steelmaking according to claim 1, wherein: In step 2, the cylinder a (142) drives the baffle (141) to rotate, thereby opening and closing the discharge port a (122) and the discharge port b (133).

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