Preparation process of high-purity ferroboron alloy

Abstract

The invention relates to the technical field of ferroboron alloys, in particular to a preparation process of a high-purity ferroboron alloy, which comprises the following steps: S1, preparing raw materials; s2, electric furnace smelting; s3, chemical refining; s4, adjusting components; s5, casting and cooling; and S6, heat treatment. And heat treatment equipment in the step S6 comprises a heating box, a placing mechanism, a path unit, a driving unit and an intermittent unit. The clamped cast ingots intermittently move along a set path through the driving unit, so that the inner cast ingots can move to the outer side to be close to a heat source, each cast ingot can be uniformly heated, then, the cast ingots deflect by a certain angle through the intermittent unit, and after the cast ingots move out of the vertical section of the path, the cast ingots are separated from the heat source. The clamped area of the cast ingot in the initial state is exposed, in conclusion, the area, facing a heat source, of the cast ingot and the distance between the cast ingot and the heat source are intermittently changed, the heating effect in the heat treatment process of the cast ingot is improved, and the problems of excessive heating and insufficient heating are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ferroboron alloys, and in particular to a preparation process of a high-purity ferroboron alloy. Background Art

[0002] High-purity ferroboron alloy is a special alloy material that is purer and has extremely low impurity content. On the basis of ordinary low-carbon ferroboron alloy, the content of carbon and elements such as silicon, aluminum, and titanium is further reduced, and the proportion of carbon is strictly reduced. This material is widely used in high-end steel manufacturing, special alloys, electronics and optoelectronics industries and other technical fields due to its high purity and precise composition control; the current preparation method of high-purity low-carbon ferroboron alloy includes raw material preparation, electric furnace smelting, chemical refining, composition adjustment, casting cooling, heat treatment and other steps, among which the main purpose of the heat treatment step is to optimize the internal organizational structure of the material and improve the material performance.

[0003] High-purity ferroborane round ingot is a high-quality raw material specially used for metallurgy and special steel production. Its main feature is that it contains a high level of boron. It is mainly cylindrical or cylindrical in shape, which is convenient for storage and transportation. During the operation, the ingot needs to be heat treated after casting and cooling. At present, the heat treatment operation mainly fixes multiple ingots to the frame, and then moves the frame and multiple ingots into the heating furnace for heating (the current heating sources include resistance heating elements, induction coils, burners and microwave generators, etc.), and takes them out for cooling after heating.

[0004] The current heat treatment process has the following problems: the heat sources in the heating furnace are usually located on both sides of the ingot. Therefore, during the heating process, the part of the ingot close to the heating source is fully heated, but the part of the ingot far from the heat source is prone to insufficient heating, which affects the heat treatment effect and even leads to increased internal stress, deformation and cracking of the ingot. Summary of the invention

[0005] Based on this, it is necessary to provide a preparation process of high-purity ferroboron alloy to solve the problems of the above-mentioned prior art.

[0006] The present application provides a preparation process of a high-purity boron iron alloy, comprising the following steps: S1, raw material preparation: selecting high-purity boron ore and iron ore as raw materials, and performing cleaning, screening and pretreatment operations on the raw materials.

[0007] S2. Electric furnace smelting: The raw materials are added into a vacuum arc furnace for high-temperature smelting, and an appropriate amount of graphite powder reducing agent is added to control the carbon content to reach the low-carbon standard. At the same time, the melt is treated under a vacuum environment, and the gas solubility is reduced under low pressure conditions to effectively remove hydrogen and nitrogen gas impurities.

[0008] S3. Chemical refining: adding an oxidant to the melt in the vacuum arc furnace for chemical oxidation refining treatment.

[0009] S4. Composition adjustment: Accurately add boron and necessary alloy elements to the melt in the vacuum arc furnace to ensure that the chemical composition meets the requirements.

[0010] S5. Casting cooling: Pour the melt after chemical refining and composition adjustment into a mold, use an appropriate cooling rate to control the crystallization process, and obtain an ingot.

[0011] S6. Heat treatment: The ingot after casting and cooling is subjected to heat treatment by heat treatment equipment. After heat treatment and cooling, the surface is polished to obtain the required high-purity low-carbon ferroboron alloy ingot.

[0012] The heat treatment equipment in step S6 includes a heating box, a sealing door is provided at the upper opening of the heating box, two front-to-back symmetrical mounting frames are installed in the heating box through a lifting frame that slides up and down, two reinforcing frames are fixedly provided between the two mounting frames, and a placing mechanism is provided between the two mounting frames.

[0013] The placement mechanism includes a path unit, and a path unit for guiding the ingot to move along a specified route is commonly arranged between the two mounting frames, the path unit includes a semicircular groove, and two left-right symmetrical semicircular grooves are penetrated through the mounting frame, and a semicircular plate located in the corresponding semicircular groove is fixedly arranged on the mounting frame, and the semicircular plate and the semicircular groove together form a path for the movement of the ingot, and a plurality of moving rollers equidistantly arranged along the path are arranged in the semicircular groove, and horizontal columns extending from the front to the rear are rotatably installed on the opposite surfaces of the two front and rear moving rollers, and two arc-shaped clamping plates distributed up and down are arranged on the end face of the horizontal column away from the mounting frame, and the corresponding two clamping plates cooperate with each other to support and lock the ingot, and a driving unit is arranged on the mounting frame.

[0014] The two mounting frames are provided with an intermittent unit, which includes a pushing rack. The opposite surfaces of the two mounting frames are provided with two groups of bar groups distributed up and down, and the bar groups include two pushing racks distributed left and right.

[0015] According to a favorable embodiment, the path unit also includes an equidistant bar, an equidistant bar is commonly arranged between two adjacent horizontal columns, the equidistant bar and the horizontal column are rotatably connected, all horizontal columns corresponding to the same semicircular groove are staggered front and back, a reinforcing column with an axis extending from front to rear is commonly fixed between two adjacent front and rear clamping plates, a placement groove is provided on the inner arc surface of the lower clamping plate corresponding to the same horizontal column, and a plurality of circumferentially distributed rolling rollers are rotatably arranged in the placement groove.

[0016] According to a preferred embodiment, the driving unit includes a fixed column, and the opposite surfaces of the front and rear opposite moving rollers are fixedly provided with fixed columns with axes extending from front to rear, and the opposite surfaces of the front and rear opposite fixed columns are fixedly provided with sprockets 1, and the opposite back surfaces of the two mounting frames are rotatably provided with driving columns, and two sprockets 2 distributed front and back are fixedly sleeved on the driving columns, and chains are commonly provided between the two sprockets 2 and all the sprockets 1 corresponding to the two semicircular grooves.

[0017] According to an advantageous embodiment, a plurality of arc-shaped plates are fixedly provided on opposite surfaces of the two mounting frames via a connecting frame.

[0018] According to a favorable embodiment, a rectangular driving section is fixedly provided on the end face of the driving column away from the mounting frame, and a driving shaft with an axis extending from front to back and passing through the heating box is rotatably provided on the front and rear sides of the heating box. The driving shaft is located at one end inside the heating box and is slidably sleeved with a driving square cylinder. A spring is fixedly provided between the driving square cylinder and the heating box, and the end face of the driving square cylinder close to the mounting frame is an inclined surface approaching the mounting frame from top to bottom, so that the driving section is inserted into the corresponding driving square cylinder when the mounting frame moves downward.

[0019] According to a favorable embodiment, the placement mechanism also includes a fan-shaped plate, the end face of the horizontal column away from the adjacent mounting frame is fixedly provided with a fan-shaped plate, the corresponding lower clamping plate is fixedly provided on the fan-shaped plate, a rectangular block is rotatably sleeved on the horizontal column, a connecting frame is provided on the rectangular block, the rectangular block is slidably provided on the connecting frame, the corresponding upper clamping plate is fixedly provided on the connecting frame, and a spring 2 is fixedly provided between the connecting frame and the corresponding rectangular block.

[0020] According to a preferred embodiment, the placement mechanism also includes a locking unit, which includes an L-shaped block. The lower end surface of the connecting frame is fixedly provided with an L-shaped block, and the vertical section of the L-shaped block is provided with a locking groove. A sliding plate is slidingly provided on the horizontal column along its axial direction, and the locking block is fixedly provided on the sliding plate. A spring three is provided between the sliding plate and the adjacent equidistant bars.

[0021] According to a favorable embodiment, the intermittent unit also includes an unlocking group for unlocking the locked state of the clamping plate, and the unlocking group includes a fixed frame, and two fixed frames distributed up and down are fixedly arranged on the opposite surfaces of the two mounting frames, and two push rods distributed front and back and staggered left and right are penetrated through the fixed frame for left and right sliding, and arc-shaped unlocking strips are fixedly arranged on the opposite back surfaces of the two push rods, and the inner arc surface of the unlocking strip faces upward, the unlocking strips opposite to each other on the left and right are symmetrical on the left and right, and the two unlocking strips opposite to each other on the front and back are symmetrical on the front and back, and the rear side and rear end surface of the right rear unlocking strip is inclined forward from left to right.

[0022] According to a favorable embodiment, the intermittent unit also includes a U-shaped frame, the U-shaped frame is fixedly provided on the fixed frame and the adjacent mounting frame, a driving rod that slides up and down is provided on the two U-shaped frames opposite to each other, a driving plate that corresponds to the U-shaped frame is fixedly sleeved on the driving rod, the driving plate is located under the corresponding U-shaped frame, a movable plate that slides up and down is sleeved on the driving rod, a spring four is fixedly provided between the movable plate and the driving plate, and a hinged bar is hinged to the left and right sides of the end face of the movable plate facing the adjacent mounting frame through a connecting block, and the hinged bar is hinged to the adjacent unlocking bar.

[0023] According to a favorable embodiment, a gear is rotatably arranged on the vertical section of the U-shaped frame, two pushing racks in the same group are slidably arranged on the corresponding vertical section of the U-shaped frame and the pushing racks are meshed with the corresponding gears, the two pushing racks are symmetrical about the upper and lower centers of the gear axis, a rack 2 staggered from the adjacent rack 1 is fixedly arranged on the driving plate through a connecting rod, the rack 2 is meshed with the corresponding gear, a square block is fixedly arranged on the outer arc surface of the clamping plate on the upper side of the two clamping plates on the same horizontal column, and a spiral spring is fixedly arranged between the horizontal column and the corresponding rectangular block.

[0024] In summary, the present invention includes at least one of the following beneficial effects: First, the present invention enables the clamped ingot to intermittently move along a set path through a driving unit, so that the internal ingot can be moved to the outside close to the heat source, so that each ingot can be heated evenly. Secondly, the ingot is deflected by a certain angle through the intermittent unit. Therefore, when the ingot moves out of the vertical section of the path, the clamped area of ​​the ingot in the initial state is exposed, and then heat treatment is carried out. In summary, the area of ​​the ingot facing the heat source and the distance between the ingot and the heat source are intermittently changed, thereby improving the heating effect during the heat treatment process and avoiding the problems of overheating and insufficient heating.

[0025] 2. In the present invention, the driving section on the driving column is connected to the driving shaft by an up and down plug-in method. This method can transmit the drive of the external motor to the two mounting frames in the heating box, while meeting the requirements of rapid disassembly and rapid installation of the mounting frames. It is convenient to lift out the two mounting frames and all ingots at the same time after the heat treatment is completed for the next operation, and can also avoid the problem of high temperature in the heating box affecting the operating state of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1A flow chart of a preparation process of a high-purity ferroboron alloy provided according to an embodiment of the present invention is shown.

[0028] Figure 2 A schematic structural diagram of the heat treatment equipment in step S6 provided according to an embodiment of the present invention is shown.

[0029] Figure 3 A schematic diagram of a partial cross-sectional structure between a heating box, a reinforcement frame and a reinforcement column provided according to an embodiment of the present invention is shown.

[0030] Figure 4 A stereoscopic view of a mounting frame, a clamping plate and a semicircular groove provided according to an embodiment of the present invention is shown.

[0031] Figure 5 The embodiment provided according to the present invention shows Figure 4 Enlarged view of point A in the middle.

[0032] Figure 6 A three-dimensional schematic diagram of a clamping plate, a direction block and a locking unit provided according to an embodiment of the present invention is shown.

[0033] Figure 7 A schematic diagram of the structure among a horizontal column, a fixed column and a clamping plate provided according to an embodiment of the present invention is shown.

[0034] Figure 8 The embodiment provided according to the present invention shows Figure 7 Enlarged view of point B in the middle.

[0035] Fig. 9 A schematic diagram showing changes in unlocking a locking block by an unlocking group provided in an embodiment of the present invention is shown.

[0036] Fig.10 A schematic diagram of the three-dimensional structure between a U-shaped frame, an unlocking bar and a hinge bar provided according to an embodiment of the present invention is shown.

[0037] Fig.11 A schematic diagram of the three-dimensional structure among the clamping plate, the rolling roller and the connecting frame provided according to an embodiment of the present invention is shown.

[0038] The above drawings include the following reference numerals: 1. Heating box; 10. Sealing door; 11. Mounting frame; 12. Reinforcement frame; 2. Placing mechanism; 20. Path unit; 200. Semicircular groove; 201. Semicircular plate; 202. Moving roller; 203. Horizontal column; 204. Clamping plate; 21. Equidistant strip; 210. Reinforcement column; 211. Rolling roller; 22. Fan-shaped plate; 220. Rectangular block; 221. Connecting frame; 222. Spring 2; 23. Locking unit; 230. L-shaped block; 231. Locking groove; 232. Sliding plate; 233. Locking block; 234. Spring 3; 3. Driving unit; 30, fixed column; 31, sprocket one; 32, driving column; 33, sprocket two; 34, chain; 35, arc plate; 36, driving section; 360, driving shaft; 361, driving square cylinder; 362, spring one; 4, intermittent unit; 40, pushing rack; 41, unlocking group; 410, fixed frame; 411, pushing rod; 412, unlocking strip; 42, U-shaped frame; 420, driving rod; 421, driving plate; 422, moving plate; 423, spring four; 424, hinged strip; 43, gear; 430, rack two; 431, square block; 432, scroll spring. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0040] like Figure 1 As shown, a preparation process of a high-purity boron iron alloy includes the following steps: S1. Raw material preparation: select high-purity boron ore and iron ore as raw materials, and perform cleaning, screening and pretreatment operations on the raw materials to ensure that the impurity content in the raw materials is as low as possible.

[0041] S2. Electric furnace smelting: The raw materials are added into a vacuum arc furnace for high-temperature smelting, and an appropriate amount of graphite powder reducing agent is added to control the carbon content to reach the low-carbon standard. At the same time, the melt is treated under a vacuum environment, and the gas solubility is reduced under low pressure conditions to effectively remove hydrogen and nitrogen gas impurities. The electric arc furnace can provide a high enough temperature to melt the raw materials and help remove some volatile impurities.

[0042] S3. Chemical refining: adding an oxidant to the melt in the vacuum arc furnace for chemical oxidation refining treatment; wherein the oxidant is selected from calcium oxide or manganese oxide, and the silicon and aluminum elements in the melt are effectively removed through chemical reaction, and the oxides produced by the chemical reaction will float on the surface of the melt to form slag, which is then removed.

[0043] S4. Composition adjustment: Accurately add boron and necessary alloying elements to the melt in the vacuum arc furnace to ensure that the chemical composition meets the requirements.

[0044] S5. Casting cooling: Pour the chemically refined and component-adjusted melt into the mold, use an appropriate cooling rate to control the crystallization process, and obtain an ingot. Appropriate cooling technology can be used to obtain a fine and uniform grain structure, improve material properties, and avoid microscopic defects.

[0045] S6. Heat treatment: The ingot after casting is cooled by heat treatment equipment, and the surface is polished after cooling to obtain the required high-purity low-carbon ferroboron alloy ingot. The heat treatment can improve the organizational structure of the ingot and enhance the mechanical properties.

[0046] like Figure 2 and Figure 3 As shown, the heat treatment equipment in step S6 includes a heating box 1, a sealing door 10 is provided at the upper opening of the heating box 1, two front-to-back symmetrical mounting frames 11 are installed in the heating box 1 through a lifting frame that slides up and down, two reinforcing frames 12 for enhancing the overall load-bearing strength are fixedly arranged between the two mounting frames 11, a placing mechanism 2 is provided between the two mounting frames 11, and the left and right inner sides of the heating box 1 are provided with heat sources for heat treatment operations (heat sources include existing resistance heating elements, induction coils, burners and microwave generators, etc.).

[0047] like Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the placement mechanism 2 includes a path unit 20, and a path unit 20 for guiding the ingot to move along a specified route is commonly provided between the two mounting frames 11, and the path unit 20 includes a semicircular groove 200, and two semicircular grooves 200 are provided through the mounting frame 11 and are symmetrical with each other. A semicircular plate 201 located in the corresponding semicircular groove 200 is fixedly provided on the mounting frame 11, and a path for the ingot to move is formed by the semicircular plate 201 and the semicircular groove 200, and a plurality of moving parts arranged equidistantly along the path are provided in the semicircular groove 200. Roller 202, the diameter of the moving roller 202 is the same as the spacing between the semicircular plate 201 and the semicircular groove 200, and the opposite surfaces of the two front and rear moving rollers 202 are rotatably installed with a horizontal column 203 with an axis extending from front to back, and the end surface of the horizontal column 203 away from the mounting frame 11 is provided with two upper and lower distributed and arc-shaped clamping plates 204, and the corresponding two clamping plates 204 cooperate with each other to support and lock the ingot, and a driving unit 3 is provided on the mounting frame 11, and the driving unit 3 is operated so that the clamping plate 204 drives the corresponding ingot to move along the specified path.

[0048] like Figure 2 and Fig.10 As shown, the two mounting frames 11 are jointly provided with an intermittent unit 4, the intermittent unit 4 includes a pushing rack 40, and the opposite surfaces of the two mounting frames 11 are provided with two groups of bar groups distributed up and down, and the bar groups include two pushing racks 40 distributed left and right. The intermittent unit 4 works so that the pushing rack 40 pushes the clamping plate 204 above the same side, so that the ingot is deflected.

[0049] It should be noted that during the heat treatment process, all components in the heating box 1 are made of high temperature resistant materials.

[0050] Initially, the external existing lifting device 1 pulls the lifting frame upwards, so that the two mounting frames 11 are moved out of the heating box 1, and then the loading process before heat treatment is carried out. The loading process is specifically as follows: the staff uses the external existing lifting device 2 to lift the ingot that needs to be heat treated, and loads the ingot between the two clamping plates 204 on the same horizontal column 203, so that a total of four clamping plates 204 between the two horizontal columns 203 opposite to each other cooperate to clamp and support one ingot, and finally all the clamping plates 204 clamp and support ingots, and then the external lifting device 1 gradually moves the lifting frame downward, so that the two mounting frames 11 drive the ingots thereon back into the heating box 1, and the sealing door 10 is lifted and finally closed by the external existing lifting device 3.

[0051] The heat source works to heat treat all the ingots from the left and right sides of the heating box 1, and at the same time, the driving unit 3 works to move the clamped ingots along the formed path (the path is divided into an arc section and a vertical section in the left and right directions, and the vertical section of the path is close to the center position of the mounting frame 11), so that the ingots close to the axis position of the mounting frame 11 can move outward close to the heat source, ensuring that each ingot can be heated evenly. Secondly, when the ingot has undergone a period of heat treatment and moves from top to bottom along the vertical section of the path to the specified position, the driving unit 3 stops working, and then the intermittent unit 4 works to make the pushing racks 40 in the same group move away from each other, thereby pushing the corresponding upper clamping plate 204, so that the ingot deflects. In the process of the ingot moving up and down in the vertical section, it undergoes intermittent deflection on both sides, so that the area of ​​the ingot covered by the clamping plate 204 in the initial state is exposed, ensuring that the ingot can be heated evenly and improving the heat treatment effect.

[0052] After completing the heat treatment operation, the two mounting frames 11 and the ingots thereon are lifted and removed from the heating box 1 by an external lifting device, and all the ingots are directly moved by lifting the mounting frames 11 for subsequent cooling steps. When all the steps are completed, all the ingots can be taken out.

[0053] like Figure 3 , Figure 4 , Figure 6 , Figure 7 and Fig.10 As shown, the path unit 20 also includes an equidistant bar 21, and an equidistant bar 21 is commonly arranged between two adjacent horizontal columns 203. The equidistant bar 21 and the horizontal column 203 are rotatably connected, and all horizontal columns 203 corresponding to the same semicircular groove 200 are staggered front to back, and a reinforcing column 210 with an axis extending from front to back is commonly fixedly arranged between two adjacent front and rear clamping plates 204, and a placement groove is opened on the inner arc surface of the lower side clamping plate 204 corresponding to the same horizontal column 203, and a plurality of circumferentially distributed rolling rollers 211 are rotatably arranged in the placement groove.

[0054] Through all the corresponding equidistant bars 21 in the same semicircular groove 200, the distance between two adjacent horizontal columns 203 in the same semicircular groove 200 is kept fixed, so that the two adjacent horizontal columns 203 are connected and locked, which is convenient for the subsequent driving unit 3 to drive all the horizontal columns 203 in the same semicircular groove 200 to move. Secondly, the strength between the two front and rear opposite clamping plates 204 is strengthened by the reinforcing column 210, thereby improving the stability during the heat treatment process, and the rolling roller 211 is set to ensure that the placed ingot and the corresponding lower clamping plate 204 are in rolling contact, thereby avoiding the friction of direct contact affecting the subsequent deflection process.

[0055] like Figure 3 and Figure 4 As shown, the driving unit 3 includes a fixed column 30, and the opposite surfaces of the front and rear opposite moving rollers 202 are fixedly provided with fixed columns 30 with axes extending from front to back, and the opposite surfaces of the front and rear opposite fixed columns 30 are fixedly provided with sprockets 1 31, and the opposite back surfaces of the two mounting frames 11 are rotatably provided with driving columns 32, and two sprockets 2 33 distributed front and back are fixedly sleeved on the driving column 32, and chains 34 are commonly provided between the two sprockets 2 33 and all the sprockets 1 31 corresponding to the two semicircular grooves 200, and two adjacent chains 34 are staggered front and back, and the load capacity of sprockets 1 31, sprockets 2 33 and chains 34 can meet the gravity pulling load requirements of multiple ingots.

[0056] like Figure 4 As shown, a plurality of arc plates 35 are fixedly provided on opposite surfaces of the two mounting frames 11 through a connecting frame, and all the arc plates 35 corresponding to the semicircular grooves 200 cooperate with each other to maintain the trajectory shape of the chain 34 .

[0057] like Figure 4 and Figure 5As shown, a rectangular driving section 36 is fixedly provided on the end face of the driving column 32 away from the mounting frame 11, and a driving shaft 360 (the driving shaft 360 is connected to an external motor) is rotatably provided on the front and rear sides of the heating box 1, and the axis extends from front to back and passes through the heating box 1. One end of the driving shaft 360 located in the heating box 1 is provided with a driving square cylinder 361 which is slidably sleeved forward and backward. A spring 362 is fixedly provided between the driving square cylinder 361 and the heating box 1, and the end face of the driving square cylinder 361 close to the mounting frame 11 is an inclined surface approaching the mounting frame 11 from top to bottom. When the mounting frame 11 moves downward, the driving section 36 is inserted into the corresponding driving square cylinder 361.

[0058] During operation, after placing the ingot on the corresponding clamping plate 204, the external lifting device drives the mounting frame 11 to move downward, and the mounting frame 11, the driving column 32 and the driving section 36 move downward synchronously. During the downward movement of the driving section 36, the driving section 36 first contacts the inclined surface of the driving square cylinder 361, and makes the driving square cylinder 361 close to the adjacent inner wall of the heating box 1, and the spring 1 362 is compressed. As the driving column 32 and the driving section 36 continue to move downward, the driving section 36 and the inner cylinder of the driving square cylinder 361 are opposite to each other front and back, and the elastic force generated by the deformation of the spring 1 362 makes the driving square cylinder 361 close to the corresponding driving section 36. Finally, when the mounting frame 11 moves down to the specified position, the driving section 36 is stuck in the inner cylinder of the driving square cylinder 361.

[0059] In the subsequent heat treatment process, the external motor drives the driving square cylinder 361 to rotate synchronously through the driving shaft 360, and the driving square cylinder 361 drives the driving column 32 to rotate synchronously through the cooperation between it and the corresponding driving section 36. Therefore, the drive of the external motor can be transmitted to the two mounting frames 11 in the heating box 1 through the above method. Through the above-mentioned plug-in installation and external transmission method, the disassembly and installation requirements of the mounting frame 11 are met. Secondly, the problem of high temperature in the heating box 1 affecting the working state of the motor can also be avoided.

[0060] During the rotation of the driving column 32, the driving column 32 drives the sprocket 2 33 thereon to rotate synchronously. Through the cooperation between the sprocket 2 33 and the corresponding chain 34, and the cooperation between the chain 34 and the corresponding sprocket 1 31, the horizontal column 203 moves along the path formed between the semicircular groove 200 and the corresponding semicircular plate 201. Therefore, the two horizontal columns 203 opposite to each other in front and back drive the ingots to move from the outside of the mounting frame 11 to the inside of the mounting frame 11 through the corresponding clamping plates 204, so that each ingot is heated evenly. It should be noted that during the above-mentioned movement of the ingots, the two clamping plates 204 corresponding to the same horizontal column 203 are always opposite to each other up and down due to the gravity of the ingots themselves.

[0061] like Figure 2 and Fig.11As shown, the placement mechanism 2 also includes a fan-shaped plate 22, and the fan-shaped plate 22 is fixedly provided on the end face of the horizontal column 203 away from the adjacent mounting frame 11, and the corresponding lower clamping plate 204 is fixedly provided on the fan-shaped plate 22, and a rectangular block 220 is rotatably sleeved on the horizontal column 203, and a connecting frame 221 is provided on the rectangular block 220, and the rectangular block 220 is slidably provided on the connecting frame 221, and the corresponding upper clamping plate 204 is fixedly provided on the connecting frame 221, and a spring 222 is fixedly provided between the connecting frame 221 and the corresponding rectangular block 220.

[0062] like Figure 2 , Figure 6 , Figure 8 and Fig.11 As shown, the placement mechanism 2 also includes a locking unit 23 for locking the clamping state, the locking unit 23 includes an L-shaped block 230, the lower end surface of the connecting frame 221 is fixedly provided with the L-shaped block 230, the vertical section of the L-shaped block 230 is provided with a locking groove 231, a sliding plate 232 is slidably provided on the horizontal column 203 along its axial direction, a locking block 233 is fixedly provided on the sliding plate 232, a spring three 234 is provided between the sliding plate 232 and the adjacent equidistant bar 21, the elastic force generated by the deformation of the spring three 234 makes the locking block 233 snap into the corresponding locking groove 231 to complete the locking of the two clamping plates 204 after clamping, see Fig. 9 .

[0063] In the initial state, the distance between the two clamping plates 204 on the same horizontal column 203 is smaller than the diameter of the ingot, and the locking block 233 is located below the corresponding locking groove 231. At this time, because the spring three 234 is in a compressed state, the elastic force generated by the deformation of the spring three 234 causes the locking block 233 to press against the vertical section of the L-shaped block 230. Then, the staff cooperates with the external lifting equipment two to lift the ingot to between the two corresponding clamping plates 204. In this process, the ingot is squeezed by the two corresponding clamping plates 204. Therefore, the upper clamping plate 204 of the two clamping plates 204 corresponding to the same horizontal column 203 moves up, and finally the ingot is stuck in the two corresponding clamping plates. 204, during this process, the connecting frame 221 moves upward, so that the spring two 222 is stretched, and the elastic force generated by the stretched deformation of the spring two 222 makes the clamping plate 204 corresponding to the connecting frame 221 initially press down the ingot, and at the same time, as the connecting frame 221 drives the L-shaped block 230 to continue to move upward, the locking groove 231 gradually moves upward and is aligned with the corresponding locking block 233 front and back, and the elastic force generated by the deformation of the spring three 234 makes the locking block 233 snap into the locking groove 231, completing the locking process of the clamping plate 204 on the connecting frame 221, that is, locking the corresponding two clamping plates 204 to clamp the ingot, thereby improving the stability during the rotational heat treatment process.

[0064] In summary, after the ingots are gradually hoisted and placed at the corresponding positions, all the ingots between the two mounting frames 11 are clamped and locked. Secondly, the two opposite fan-shaped plates 22 cooperate with each other to tighten the front and rear directions of the ingots.

[0065] like Figure 2 , Figure 6 , Figure 7 and Fig.10 As shown, the intermittent unit 4 also includes an unlocking group 41 for unlocking the locked state of the clamping plate 204, and the unlocking group 41 includes a fixed frame 410, and two fixed frames 410 distributed up and down are fixedly arranged on the opposite surfaces of the two mounting frames 11, and two push rods 411 distributed front and back and staggered left and right are penetrated through the fixed frame 410 for sliding left and right, and arc-shaped unlocking strips 412 are fixedly arranged on the opposite back surfaces of the two push rods 411, and the inner arc surface of the unlocking strip 412 faces upward, and the unlocking strips 412 opposite to each other on the left and right are symmetrical on the left and right, and the two unlocking strips 412 opposite to each other front and back are symmetrical front and back. Taking the unlocking strip 412 at the rear of the right side as an example, the rear side and rear end surface of the unlocking strip 412 at the rear of the right side is inclined forward from left to right.

[0066] like Figure 2 and Fig.10 As shown, the intermittent unit 4 also includes a U-shaped frame 42, and the U-shaped frame 42 is fixedly provided on the fixed frame 410 and the adjacent mounting frame 11, and a driving rod 420 that slides up and down is provided on the two U-shaped frames 42 that are opposite to each other (the driving rod 420 penetrates the sealing door 10 and contacts with the external electric push rod and pushes it to move up and down), and a driving plate 421 corresponding to the U-shaped frame 42 is fixedly sleeved on the driving rod 420, and the driving plate 421 is located below the corresponding U-shaped frame 42, and a moving plate 422 that slides up and down is sleeved on the driving rod 420, and a spring 423 is fixedly provided between the moving plate 422 and the driving plate 421, and a hinged bar 424 is hinged to the left and right sides of the moving plate 422 toward the end face of the adjacent mounting frame 11 through a connecting block, and the hinged bar 424 is hinged to the adjacent unlocking bar 412.

[0067] like Figure 8 , Fig.10 and Fig.11As shown, a gear 43 is rotatably provided on the vertical section of the U-shaped frame 42, two pushing racks 40 in the same group are slidably provided on the corresponding vertical section of the U-shaped frame 42, and the pushing racks 40 are meshed with the corresponding gears 43, and the two pushing racks 40 are symmetrical about the upper and lower centers of the axis of the gear 43, and a rack 2 430 staggered from the adjacent rack 1 is fixedly provided on the driving plate 421 through a connecting rod, and the rack 2 430 is meshed with the corresponding gear 43, and a square block 431 is fixedly provided on the outer arc surface of the clamping plate 204 on the upper side of the two clamping plates 204 on the same horizontal column 203, and a spiral spring 432 is fixedly provided between the horizontal column 203 and the corresponding rectangular block 220.

[0068] As the driving unit 3 works, it drives the two horizontal columns 203 facing each other front and back and the ingot to move synchronously from top to bottom to the vertical section of the path. When the corresponding two horizontal columns 203 move to the specified deflection position (at this time, the push rack 40 is opposite to the corresponding square block 431, and the unlocking bar 412 is opposite to the corresponding sliding plate 232), the driving unit 3 stops operating, so that all horizontal columns 203 stop moving. It should be noted that the length of the driving rod 420 meets the safe operating length, so that the external electric push rod is in a safe operating environment to avoid the high temperature of the heating box 1 affecting its normal operation process.

[0069] The spring 423 is compressed and the elastic force generated by the compression deformation of the spring 423 causes the moving plate 422 to continue to move upward, so that the inclined surface of the unlocking strip 412 presses the sliding plate 232, so that the sliding plate 232 drives the locking block 233 thereon to exit the locking groove 231, thereby completing the unlocking action of the corresponding upper clamping plate 204. Fig. 9 .

[0070] Afterwards, as the driving rod 420 continues to move upward, the rack 2 430 is meshed with the corresponding gear 43, and the gear 43 cooperates with the corresponding pushing rack 40, so that the two adjacent pushing racks 40 move away from each other, and the pushing rack 40 pushes the adjacent square block 431, so that the square block 431 drives the clamping plate 204 thereon to deflect, and the clamping plate 204 drives the ingot to deflect a certain angle by the thrust generated by the direct contact between the pushing rack 40 and the square block 431 during the deflection process. In summary, the ingot is driven to deflect by the two deflection actions on the two U-shaped frames 42, so that the blocked area in the initial clamping process can be exposed, thereby ensuring that the ingot is heated evenly. It should be noted that during a single push, During the deflection action, the square block 431 drives the clamping plate 204, the connecting frame 221 and the rectangular block 220 to rotate synchronously, so that the spiral spring 432 is deformed, and the external electric push rod releases the drive to the driving rod 420. The driving rod 420 moves downward to push the rack 40 to reset. At the same time, the elastic force generated by the deformation of the spiral spring 432 resets the connecting frame 221 and the clamping plate 204. The square block 431 and the corresponding clamping plate 204 are free to reset, and the clamping plate 204 is not subjected to forces in other directions. At this time, the friction between the clamping plate 204 and the ingot during the resetting process is not enough to cause the ingot to deflect, so that the ingot and the upper clamping plate 204 move relative to each other, thereby exposing the area of ​​the ingot that was originally blocked.

[0071] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0072] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A preparation process of a high-purity ferroboron alloy, comprising the following steps: S1. Raw material preparation: cleaning, screening and pretreatment of raw materials; S2, electric furnace smelting: the raw materials are smelted at high temperature to obtain a melt, and low pressure conditions are used to reduce the gas solubility; S3, chemical refining: adding an oxidant to the melt for chemical oxidation refining; S4. Composition adjustment: Add boron and alloy elements to the melt to ensure that the composition meets the requirements; S5, casting cooling: pouring the melt into a mold and controlling the crystallization process to obtain an ingot; S6. Heat treatment: heat treating the ingot by heat treatment equipment, and then polishing the surface to obtain a high-purity low-carbon ferroboron alloy ingot; The heat treatment equipment in step S6 includes a heating box, a sealing door is provided at the upper opening of the heating box, two front-to-back symmetrical mounting racks are slidably installed in the heating box, and a placement mechanism is provided between the two mounting racks; The placement mechanism includes a path unit, a path unit for guiding the ingot to move along a specified route is commonly arranged between the two mounting frames, the path unit includes a semicircular groove, two semicircular grooves are symmetrically arranged on the mounting frame, a semicircular plate is fixedly arranged on the mounting frame, and a path for the ingot to move is formed by the semicircular plate and the semicircular groove, a plurality of moving rollers arranged equidistantly along the path are arranged in the semicircular groove, and horizontal columns with axes extending from front to back are rotatably installed on the opposite surfaces of the two front and rear moving rollers, and two arc-shaped clamping plates distributed up and down are arranged on the end surface of the horizontal column away from the mounting frame, and a driving unit for driving the clamping plate to move along the path is arranged on the mounting frame; An intermittent unit is commonly provided on the two mounting frames, and the intermittent unit includes a pushing rack. Two groups of bar groups distributed vertically are provided on the opposite surfaces of the two mounting frames, and the bar groups include two pushing racks distributed left and right. Through the intermittent unit, the pushing rack pushes the clamping plate above the same side to deflect the ingot.

2. The process for preparing a high-purity ferroboron alloy according to claim 1, characterized in that: The path unit also includes an equidistant bar, which is commonly arranged between two adjacent horizontal columns. The equidistant bar and the horizontal column are rotatably connected. All horizontal columns corresponding to the same semicircular groove are staggered front and back. A reinforcing column with an axis extending from front to back is commonly fixed between two adjacent front and rear clamping plates. A placement groove is provided on the inner arc surface of the lower clamping plate corresponding to the same horizontal column, and a plurality of circumferentially distributed rolling rollers are rotatably arranged in the placement groove.

3. The process for preparing a high-purity ferroboron alloy according to claim 1, characterized in that: The driving unit includes a fixed column, and the opposite surfaces of the front and rear moving rollers are fixedly provided with fixed columns with axes extending from front to back, and the opposite surfaces of the front and rear fixed columns are fixedly provided with sprockets 1, and the opposite back surfaces of the two mounting frames are rotatably provided with driving columns, and two sprockets 2 distributed front and back are fixedly sleeved on the driving column, and chains are commonly provided between the two sprockets 2 and all sprockets 1 corresponding to the two semicircular grooves, and two adjacent chains are staggered front and back, and the load capacity of sprockets 1, sprockets 2 and chains can meet the gravity pulling load requirements of multiple ingots.

4. The process for preparing a high-purity ferroboron alloy according to claim 3, characterized in that: The opposite surfaces of the two mounting frames are fixedly provided with a plurality of arc-shaped plates through the connecting frame, and all the arc-shaped plates corresponding to the semicircular grooves cooperate with each other to maintain the trajectory shape of the chain.

5. The process for preparing a high-purity ferroboron alloy according to claim 3, characterized in that: A rectangular driving section is fixedly provided on the end face of the driving column away from the mounting frame, and a driving shaft with an axis extending from front to back and penetrating the heating box is rotatably provided on the front and rear sides of the heating box. A driving square cylinder is slidably sleeved on one end of the driving shaft located in the heating box, and a spring is fixedly provided between the driving square cylinder and the heating box. The end face of the driving square cylinder close to the mounting frame is an inclined surface approaching the mounting frame from top to bottom, so that the driving section is inserted into the corresponding driving square cylinder when the mounting frame moves downward.

6. The process for preparing a high-purity ferroboron alloy according to claim 1, characterized in that: The placement mechanism also includes a fan-shaped plate, and the end face of the horizontal column away from the adjacent mounting frame is fixedly provided with a fan-shaped plate, and the corresponding lower clamping plate is fixedly provided on the fan-shaped plate, and a rectangular block is rotatably sleeved on the horizontal column, and a connecting frame is provided on the rectangular block, and the rectangular block is slidably provided on the connecting frame, and the corresponding upper clamping plate is fixedly provided on the connecting frame, and a second spring is fixedly provided between the connecting frame and the corresponding rectangular block.

7. A process for preparing a high-purity ferroboron alloy according to claim 6, characterized in that: The placement mechanism also includes a locking unit for locking the clamping state, the locking unit includes an L-shaped block, the lower end surface of the connecting frame is fixedly provided with the L-shaped block, the vertical section of the L-shaped block is provided with a locking groove, a sliding plate is provided on the horizontal column for sliding along its axial direction, a locking block is fixedly provided on the sliding plate, a spring three is provided between the sliding plate and the adjacent equidistant bars, and the elastic force generated by the deformation of the spring three causes the locking block to be inserted into the corresponding locking groove to complete the locking of the two clamping plates after clamping.

8. The process for preparing a high-purity ferroboron alloy according to claim 7, characterized in that: The intermittent unit also includes an unlocking group for unlocking the locked state of the clamping plate, and the unlocking group includes a fixed frame, and two fixed frames distributed up and down are fixedly arranged on the opposite surfaces of the two mounting frames, and two push rods distributed front and back and staggered left and right are penetrated through the fixed frame for left and right sliding, and arc-shaped unlocking strips are fixedly arranged on the opposite back surfaces of the two push rods, and the inner arc surface of the unlocking strip faces upward, the unlocking strips opposite to each other on the left and right are symmetrical on the left and right, and the two unlocking strips opposite to each other on the front and back are symmetrical on the front and back, and the rear side and rear end surface of the unlocking strip at the rear right side is inclined forward from left to right.

9. A process for preparing a high-purity ferroboron alloy according to claim 8, characterized in that: The intermittent unit also includes a U-shaped frame, the fixed frame and the adjacent mounting frame are jointly fixedly provided with a U-shaped frame, and a driving rod that slides up and down is jointly provided on the two U-shaped frames that are opposite to each other up and down, and a driving plate that corresponds to the U-shaped frame is fixedly sleeved on the driving rod, and the driving plate is located below the corresponding U-shaped frame, and a moving plate that slides up and down is sleeved on the driving rod, and a spring four is jointly fixedly provided between the moving plate and the driving plate, and a hinged bar is hinged to the left and right sides of the end face of the moving plate facing the adjacent mounting frame through a connecting block, and the hinged bar is hinged to the adjacent unlocking bar.

10. A process for preparing a high-purity ferroboron alloy according to claim 9, characterized in that: A gear is rotatably arranged on the vertical section of the U-shaped frame, and two pushing racks in the same group are slidably arranged on the corresponding vertical section of the U-shaped frame to the left and right, and the pushing racks are meshed with the corresponding gears. The two pushing racks are symmetrical about the upper and lower centers of the gear axis, and a rack 2 staggered from the adjacent rack 1 is fixedly arranged on the driving plate through a connecting rod, and the rack 2 is meshed with the corresponding gear. A square block is fixedly arranged on the outer arc surface of the clamping plate on the upper side of the two clamping plates on the same horizontal column, and a spiral spring is fixedly arranged between the horizontal column and the corresponding rectangular block.

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