Metallic silicon multi-time pickling purification equipment and method
Through multiple pickling equipment and dynamic pickling liquid flow technology, the problem of incomplete removal of impurities in traditional pickling processes is solved, efficient and uniform purification of metal silicon is achieved, and production costs are reduced.
Patent Information
- Application Number
- CN202510651294.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-08-08
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The traditional metal silica pickling process is difficult to completely remove complex impurities on the surface, especially stubborn oxides and organic impurities, resulting in unsatisfactory pickling effect and cannot meet the needs of high-purity metal silicon.
Multiple pickling equipment is adopted, including multiple pickling tanks, diversion tanks, support mechanisms, rotating mechanisms and toggle mechanisms. Through multiple pickling and dynamic flow of pickling liquid, we ensure that the metal silicon and the acid liquid are in full contact, and the uniform cleaning is achieved in combination with the turnover mechanism to reduce the amount of acid liquid and production costs.
It realizes efficient removal of complex impurities on the surface of metal silicon, improves purity, ensures uniformity and safety of the pickling effect, reduces production costs, and reduces resource waste.
Smart Images
Figure CN120438331A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of metal silicon pickling, in particular to a metal silicon multiple pickling purification device and method. Background Art
[0002] As an important industrial raw material, metallic silicon is widely used in semiconductors, photovoltaics, electronics, chemicals and other fields. Its purity directly affects the performance and quality of the product. In the production process of metallic silicon, pickling is one of the key steps to remove impurities on the surface of metallic silicon. However, traditional metallic silicon pickling processes and equipment have many shortcomings and cannot meet the demand of modern industry for high-purity metallic silicon.
[0003] The traditional pickling process usually adopts a single pickling method, which is difficult to completely remove the complex impurities on the surface of metallic silicon, especially for some stubborn oxides, silicon powder residues and organic impurities, and the pickling effect is not ideal. Therefore, a metallic silicon multiple pickling purification equipment and method are proposed to solve the above problems. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a multiple acid washing and purification device and method for metallic silicon in view of the deficiencies in the above-mentioned prior art.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a multiple pickling and purification device for metallic silicon, comprising multiple pickling tanks for pickling metallic silicon, and further comprising: The diversion trough is fixedly connected to the outer wall of the pickling tank to divert the dripping acid; A plurality of legs are respectively fixedly connected to the bottom of the pickling tank; A cleaning cylinder, provided on the inner wall of the pickling tank, for loading metal silicon for pickling; A supporting mechanism, provided on the inner wall of the guide groove, for supporting the cleaning cylinder; a rotating mechanism, provided on the inner wall of the guide groove, for rotating the cleaning cylinder; A toggle mechanism is provided in the cleaning cylinder and is used to toggle the metal silicon inside the cleaning cylinder; Wherein, the supporting mechanism includes: Two pillars are respectively fixedly connected to the bottom of the inner wall of the pickling tank; An arc-shaped support is fixedly connected to the top of the pillar, and a rotating shaft is fixedly connected to the axis of the cleaning cylinder. The rotating shaft is rotatably connected to the arc-shaped support and is used to place the cleaning cylinder for rotation; Two support rods are symmetrically arranged on both sides of the arc support and are fixedly connected to the arc support and the pickling tank respectively; The mixing component is arranged inside the pickling tank and is used for stirring the pickling liquid.
[0006] Preferably, the mixing assembly comprises: Two arc-shaped plates are symmetrically arranged on the inner wall of the pickling tank and are arranged symmetrically on both sides; A groove is formed on one side of the arc-shaped support; An L-shaped rod, movably connected to the arc-shaped support, with one end located in the groove and connected to a curved push plate for pushing the L-shaped rod to move; The push rod has two ends hinged to the arc plate and the other end of the L-shaped rod respectively, and is used for pushing and moving.
[0007] Preferably, the mixing assembly further comprises: The middle part of the swing rod is rotatably connected to the pillar through a pin shaft, and the two ends of the swing rod are respectively hinged to the arc plates on both sides.
[0008] Preferably, the rotating mechanism includes: A reciprocating screw rod is arranged on the inner wall of the guide groove, and a fluororubber sealing ring is provided for sealing the rotating part; A sliding rod, fixedly connected to the inner wall of the guide groove; Two connecting rods are spaced apart on the outer wall of the reciprocating screw and movably sleeved on the outer wall of the sliding rod and move with the rotation of the reciprocating screw; a rack fixedly connected to one end of the two connecting rods; The gear is fixedly connected to the outer wall of the cleaning cylinder, and the rack is engaged with the gear. The rack is used to drive the gear to drive the cleaning cylinder to rotate.
[0009] Preferably, the toggle mechanism includes: Two connecting seats are symmetrically connected to the outer walls of the hexagonal cleaning cylinder at opposite corners; A plurality of levers are movably passed through the rotating shaft, and the two ends of the levers are movably passed through the cleaning cylinder and the connecting seat respectively. The outer wall of the rotating shaft is fixedly sleeved with an elliptical plate, and the outer wall of the arc plate is in contact with the two arc push plates, which is used to push the arc push plates to move; Two arc-shaped interference rods are fixedly connected to the extended end of the shifting rod and are used to push the shifting rod to move; A plurality of toggle rods are fixedly connected to the outer wall of the toggle rod and toggle the metal silicon as the toggle rod moves; The toggle frame is fixedly connected to the end of the toggle rod away from the toggle rod; A plurality of arc-shaped wave rods are respectively arranged on both sides of the inner wall of the pickling tank and are symmetrical in front and back. The inner sides of the arc-shaped wave rods are in contact with the arc-shaped abutting rods.
[0010] Preferably, the crests and troughs of the arc-shaped wave rods on the left and right sides are relatively staggered, and the right arc-shaped wave rod pushes the arc-shaped resistance rod to drive the arc-shaped resistance rod at the other end of the shift rod to resist into the trough of the left arc-shaped wave rod.
[0011] Preferably, the cleaning cylinder is further provided with a turning mechanism for turning the metal silicon in the cleaning cylinder so that the cleaning cylinder turns over; The flipping mechanism also includes: A flip rod fixing seat, fixedly connected to the outer wall of the cleaning cylinder; A plurality of movable rods are movably connected to the inner wall of the flip rod fixing seat and movably penetrate the cleaning cylinder and extend into the interior thereof; An arc-shaped baffle fixedly connected to the inner extension end of the movable rod; A resistance rod, fixedly connected to the top of the movable rod and resisting the arc-shaped wave rod on the right side; A limiting groove is provided on the outer wall of the movable rod; A U-shaped sleeve fixedly connected to the outer wall of the flip rod fixing seat; The limiting rod is movably arranged in the U-shaped sleeve and moves into the limiting groove to limit the movable rod.
[0012] A method for multiple pickling and purification of metallic silicon, used for pickling metallic silicon using the above-mentioned multiple pickling and purification equipment, comprises the following steps: Step 1: Pre-cleaning: preliminarily clean the metallic silicon raw material to remove dust, dirt and other impurities on the surface. Water washing or mechanical screening can be used; Step 2: First pickling: Open the feed hatch on the cleaning drum, place the pre-cleaned silicon metal into the cleaning drum, and add an appropriate amount of acid to the pickling tank, such as hydrochloric acid, sulfuric acid, or hydrofluoric acid. The acid concentration, pickling temperature, and time are adjusted according to the impurity content and type of the silicon metal. Generally speaking, the hydrochloric acid concentration is between 10% and 30%, the temperature is around 50-80°C, and the pickling time is 1-3 hours. Step 3: Use a hoisting device to hang it on the outer wall of the shaft and move it to a cleaning tank for cleaning until it is neutral to remove residual acid and dissolved impurities on the surface; Step 4: Pickling for multiple times, placing the cleaned metal silicon into the second pickling tank for a second pickling, taking it out and rinsing it after the pickling is completed, and then pickling it for a third time.
[0013] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. The equipment and method for multiple pickling and purification of metallic silicon can achieve efficient pickling and impurity removal. Through multiple pickling processes in multiple pickling tanks, complex impurities on the surface of metallic silicon can be gradually removed, ensuring that the purity of metallic silicon reaches a higher standard. Rinsing is performed after each pickling to further remove residual acid and impurities to ensure the pickling effect. The mixing component realizes the dynamic flow of pickling liquid through the linkage of the arc plate, push rod and L-shaped rod, promotes full contact between the acid and metallic silicon, improves pickling efficiency, reduces acid consumption, and reduces production costs.
[0014] 2. The equipment and method for multiple pickling and purification of metallic silicon can achieve uniform turning and improved cleaning effects. The cleaning cylinder is stably rotated by a rotating mechanism, and the metallic silicon inside can be evenly turned under the action of the turning mechanism, ensuring that all surfaces of the metallic silicon can fully contact the acid solution, avoiding the problem of insufficient or excessive pickling in some areas. The toggle mechanism can evenly disperse the metallic silicon through the design of the arc-shaped wave rod, toggle rod and toggle frame, further improving the pickling effect. In particular, during the rotation of the cleaning cylinder, the metallic silicon can be continuously toggled and dispersed, ensuring sufficient contact between the pickling solution and the metallic silicon.
[0015] 3. The equipment and method for multiple acid washing and purification of metallic silicon are equipped with a support mechanism that provides stable support for the cleaning cylinder through pillars, arc-shaped supports and support rods, ensuring that it will not deviate or shake during rotation. At the same time, the reciprocating screw in the rotating mechanism adopts a fluororubber sealing ring to effectively prevent acid leakage and improve the safety of the equipment. The design of the guide groove can effectively collect dripping acid to avoid acid overflow and protect the operating environment. It also facilitates the recycling of acid and reduces resource waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic structural diagram of a single pickling tank of the present invention; Figure 3 This is a schematic diagram of the internal structure of the pickling tank of the present invention; Figure 4 This is a schematic diagram of the front structure of the pickling tank of the present invention; Figure 5 This is a schematic diagram of the separation structure of the separation cylinder and the pickling tank of the present invention; Figure 6 For the present invention Figure 5 A in the middle is an enlarged structural diagram; Figure 7 This is a schematic diagram of the explosion structure of the separation cylinder of the present invention; Figure 8 This is a schematic diagram of the structure of the flipping mechanism of the present invention; Figure 9 This is a motion diagram of the flipping mechanism of the present invention.
[0017] Figure: 1, pickling tank; 2, guide trough; 3, support leg; 4, cleaning cylinder; 41, rotating shaft; 5, rotating mechanism; 51, reciprocating screw; 52, sliding rod; 53, connecting rod; 54, rack; 55, gear; 6, supporting mechanism; 61, pillar; 62, arc support; 63, supporting rod; 64, mixing assembly; 641, arc plate; 642, push rod; 643, L-shaped rod; 644 , arc-shaped push plate; 645, elliptical plate; 646, swing rod; 7, toggle mechanism; 71, connecting seat; 72, toggle rod; 73, arc-shaped interference rod; 74, toggle rod; 75, toggle frame; 76, arc-shaped wave rod; 8, flip mechanism; 81, flip rod fixing seat; 82, movable rod; 83, arc-shaped baffle; 84, U-shaped sleeve; 85, limit rod; 86, limit slot; 87, interference rod. DETAILED DESCRIPTION
[0018] 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.
[0019] See also Figure 1-9 One embodiment of the present invention is: a multiple pickling and purification device for metallic silicon, comprising a plurality of pickling tanks 1 for pickling metallic silicon, and further comprising: The diversion trough 2 is fixedly connected to the outer wall of the pickling tank 1 and is used to divert the dripping acid; A plurality of legs 3 are respectively fixedly connected to the bottom of the pickling tank 1; The cleaning cylinder 4 is provided on the inner wall of the pickling tank 1 and is used for loading metal silicon for pickling; A support mechanism 6 is provided on the inner wall of the guide groove 2 and is used to support the cleaning cylinder 4; The rotating mechanism 5 is provided on the inner wall of the guide groove 2 and is used to rotate the cleaning cylinder 4; The toggle mechanism 7 is provided in the cleaning cylinder 4 and is used to toggle the metal silicon inside the cleaning cylinder 4; Wherein, the supporting mechanism 6 includes: Two pillars 61 are fixedly connected to the bottom of the inner wall of the pickling tank 1; The arc-shaped support 62 is fixedly connected to the top of the support 61, and the axis of the cleaning cylinder 4 is fixedly connected to the rotating shaft 41. The rotating shaft 41 is rotatably connected to the arc-shaped support 62, and is used to place the cleaning cylinder 4 for rotation; Two support rods 63 are symmetrically arranged on both sides of the arc support 62 and are fixedly connected to the arc support 62 and the pickling tank 1 respectively; The mixing assembly 64 is disposed inside the pickling tank 1 and is used to stir the pickling liquid.
[0020] The mixing assembly 64 includes: Two arc-shaped plates 641 are symmetrically arranged on the inner wall of the pickling tank 1 and are arranged symmetrically on both sides; A groove is formed on one side of the arc-shaped support 62; An L-shaped rod 643 is movably connected to the arc-shaped support 62, with one end located in the groove and connected to a curved push plate 644 for pushing the L-shaped rod 643 to move; The push rod 642 has two ends hinged to the arc-shaped plate 641 and the other end of the L-shaped rod 643 respectively, and is used to push 641 to move.
[0021] The mixing assembly 64 also includes: The middle portion of the swing rod 646 is rotatably connected to the support 61 via a pin shaft, and both ends of the swing rod 646 are hinged to the arc-shaped plates 641 on both sides respectively.
[0022] The rotating mechanism 5 comprises: The reciprocating screw 51 is arranged on the inner wall of the guide groove 2, and a fluororubber sealing ring is provided at the rotating part; The sliding rod 52 is fixedly connected to the inner wall of the guide groove 2; Two connecting rods 53 are spaced apart on the outer wall of the reciprocating screw 51 and are movably sleeved on the outer wall of the sliding rod 52 and move along with the rotation of the reciprocating screw 51; The rack 54 is fixedly connected to one end of the two connecting rods 53; The gear 55 is fixedly connected to the outer wall of the cleaning tub 4 , and the rack 54 is engaged with the gear 55 . The rack 54 is used to drive the gear 55 to drive the cleaning tub 4 to rotate.
[0023] The toggle mechanism 7 comprises: Two connecting seats 71 are symmetrically connected to the outer walls of the hexagonal cleaning cylinder 4 at opposite corners; Multiple levers 72 movably penetrate the rotating shaft 41, and their ends movably penetrate the cleaning cylinder 4 and the connecting seat 71 respectively. The outer wall of the rotating shaft 41 is fixedly sleeved with an elliptical plate 645, and the outer wall of the arc plate 645 contacts the two arc push plates 644 to push the arc push plates 644 to move; Two arc-shaped abutment rods 73 are fixedly connected to the extended end of the shifting rod 72 and are used to push the shifting rod 72 to move; A plurality of toggle rods 74 are fixedly connected to the outer wall of the toggle rod 72 and move the metal silicon as the toggle rod 72 moves; The toggle frame 75 is fixedly connected to the end of the toggle rod 74 away from the toggle rod 72; A plurality of arc-shaped wave rods 76 are respectively arranged on both sides of the inner wall of the pickling tank 1 and are symmetrical in front and back. The inner sides of the arc-shaped wave rods 76 are in contact with the arc-shaped abutting rods 73 .
[0024] The crests and troughs of the left and right arc-shaped wave rods 76 are relatively staggered. The right arc-shaped wave rod 76 pushes the arc-shaped resistance rod 73 to drive the arc-shaped resistance rod 73 at the other end of the shift rod 72 to resist into the trough of the left arc-shaped wave rod 76.
[0025] A turning mechanism 8 is also provided in the cleaning cylinder 4 for turning the metal silicon in the cleaning cylinder 4 so that the metal silicon turns along with the cleaning cylinder 4. The turning mechanism 8 also includes: The flip rod fixing seat 81 is fixedly connected to the outer wall of the cleaning cylinder 4; A plurality of movable rods 82 are movably connected to the inner wall of the flip rod fixing seat 81 and movably penetrate the cleaning cylinder 4 and extend into the interior thereof; The arc-shaped baffle 83 is fixedly connected to the inner extension end of the movable rod 82; The abutment rod 87 is fixedly connected to the top of the movable rod 82 and abuts against the right side arc-shaped wave rod 76; A limiting groove 86 is provided on the outer wall of the movable rod 82; A U-shaped sleeve 84 is fixedly connected to the outer wall of the flip rod fixing seat 81; The limiting rod 85 is movably disposed in the U-shaped sleeve 84 and moves into the limiting groove 86 to limit the movable rod 82 .
[0026] Working principle: When carrying out multiple pickling tanks for metallic silicon, first place the pre-cleaned metallic silicon into the cleaning cylinder 4, and then place the entire cleaning cylinder 4 into the pickling tank 1 through the hoisting equipment, and place it on the two arc-shaped supports 62 through the rotating shaft 41 for rotation. At this time, it is only necessary to start the rotation of the motor installed outside the guide groove 2. The purification equipment is made of polytetrafluoroethylene, and a fluororubber sealing ring is installed at the rotation point of the reciprocating screw 51; When the motor rotates, it drives the reciprocating screw 51 connected to the output end of the motor to rotate through the output end. At this time, under the relative limit of the slide bar 52, it drives the connecting rod 53 to slide on the slide bar 52, and by moving the two connecting rods 53, the rack 54 is driven to move to one side, thereby driving the gear 55 to rotate, and then driving the cleaning barrel 4 to rotate, thereby turning the metal silicon placed in the cleaning barrel 4 to promote its full mixing with the acid solution, and through the mutual friction of the metal silicon, the impurities on its surface are cleaned and the impurities are promoted to be separated; Furthermore, when the cleaning cylinder 4 rotates, it will drive the elliptical plate 645 to rotate. At this time, it will continuously and successively contact the arc-shaped push plates 644 on both sides through its outer wall. When the side of the elliptical plate 645 away from the center of the circle contacts the right arc-shaped push plate 644, the side of the elliptical plate 645 close to the center of the circle will contact the left arc-shaped push plate 644. At this time, it will push the right arc-shaped push plate 644 to move, and then push the L-shaped rod 643 to move. At this time, it will push the push rod 642 to deflect and move downward, and at the same time squeeze the right side of the swing rod 646 to deflect downward, thereby pushing the arc plate 641 to move toward the inner wall of the pickling tank 1, thereby realizing the toggle of the pickling. The pickling liquid in the pickling tank 1 is engaged with the pickling liquid in the pickling tank 1, so as to promote the contact with the metal silicon. At the same time, when the right side of the swing rod 646 moves downward, it will pry the left side to deflect upward, thereby resisting the push rod 642 from moving upward and pushing the L-shaped rod 643 on the left, so that the arc-shaped push plate 645 on the left can always fit the outer wall of the elliptical plate 645. In the process of the elliptical disk 645 rotating to the side away from the circle and resisting the left arc-shaped push plate 645, the left arc-shaped plate 641 will be gradually moved toward the inner wall of the pickling tank 1, and the right arc-shaped plate 641 will move away from the pickling tank 1, thereby achieving the effect of moving the pickling liquid to promote the contact with the metal silicon. Furthermore, when the cleaning cylinder 4 rotates and flips the metal silicon, the metal silicon at this time will follow the rotation inside the cleaning cylinder 4, but under the action of gravity, it will roll against the bottom of the inner wall of the cleaning cylinder 4. When rolling, under the action of gravity, the arc baffle 83, the movable rod 82 and the resistance rod 87 move downward as a whole, and make the arc baffle 83 fit against the inner wall of the cleaning cylinder 4, so that the metal silicon can be driven to follow the rotation of the cleaning cylinder 4. At the same time, the limiting rod 85 will slide in the U-shaped sleeve 84 under the action of gravity and resist into the limiting groove 86, thereby achieving stable engagement with it, avoiding the arc baffle 83 from loosening during rotation, and during continuous rotation, until the arc baffle 83 rotates to the top, and when the limiting rod 85 is again Under the action of gravity, the upper and lower sides of the limiting groove 86 are inclined, so that the limiting rod 85 can be easily disengaged from the limiting groove 86 and slide in the U-shaped sleeve 84, thereby releasing the contact with the limiting groove 86. Then, under the action of gravity, the arc baffle 83 moves downward, thereby releasing the metal silicon brought up and allowing the metal silicon to be evenly scattered inside the cleaning cylinder 4, so as to promote contact with the pickling liquid and improve the cleaning effect. At the same time, when continuing to rotate, the interference rod 87 will interfere with the wavy rod 76 on the right side, so that it can always remain in the open state, and until the limiting rod 85 has a tendency to move again, the interference rod 87 breaks away from the wavy rod 76 and falls to push the arc baffle 83 to fit the inner wall of the cleaning cylinder 4, so as to drive the metal silicon to move again. Furthermore, when the cleaning cylinder 4 rotates, it also drives the two symmetrically arranged arc-shaped contact rods 73 to continuously contact the arc-shaped wave rods 76 on the left and right sides. When the crest of the right arc-shaped wave rod 76 contacts the arc-shaped contact rod 73, it pushes it to move, and drives the left arc-shaped contact rod 73 to contact the trough of the left arc-shaped wave rod 76 through the lever 72. When the crest of the left arc-shaped wave rod 76 contacts the arc-shaped contact rod 73, it pushes it to move, and drives the right arc-shaped contact rod 73 to contact the trough of the right arc-shaped wave rod 76 through the lever 72. With this continuous movement, the lever 74 and the lever frame 75 on the outer wall of the lever 72 are pushed, so that the metal silicon sliding off the arc-shaped baffle 83 can be moved and dispersed, and at the same time, the metal silicon located below the cleaning cylinder 4 can be continuously moved back and forth, further improving the pickling effect.
[0027] See also Figure 1-9 Another embodiment of the present invention is a method for multiple acid washing and purification of metallic silicon, which is used for the above-mentioned multiple acid washing and purification equipment for metallic silicon to carry out acid washing of metallic silicon, comprising the following steps: Step 1: Pre-cleaning: preliminarily clean the metallic silicon raw material to remove dust, dirt and other impurities on the surface. Water washing or mechanical screening can be used; Step 2: First pickling: Open the feed hatch on the cleaning cylinder 4, place the pre-cleaned metallic silicon into the cleaning cylinder 4, and add an appropriate amount of acid to the pickling tank 1, such as hydrochloric acid, sulfuric acid or hydrofluoric acid. The acid concentration, pickling temperature and time are adjusted according to the impurity content and type of the metallic silicon. Generally speaking, the hydrochloric acid concentration is between 10% and 30%, the temperature is around 50-80°C, and the pickling time is 1-3 hours. Step 3: Use a hoisting device to hang it on the outer wall of the rotating shaft 41 and move it to a cleaning tank for cleaning until it is neutral to remove the acid and dissolved impurities remaining on the surface; Step 4: Pickling for multiple times, put the cleaned metal silicon into the second pickling tank 1 for secondary pickling, take it out and rinse it after the pickling is completed, and then pickle it for the third time. The present invention provides a multi-step acid-washing purification apparatus and method for metallic silicon. While there are numerous methods and approaches for implementing this technical solution, the above is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Any components not specified in this embodiment may be implemented using existing technologies.
Claims
1. A multiple pickling and purification device for metallic silicon, comprising a plurality of pickling tanks (1), for pickling metallic silicon, characterized in that: Also includes: A diversion trough (2) is fixedly connected to the outer wall of the pickling tank (1) and is used to divert dripping acid; A plurality of legs (3) are respectively fixedly connected to the bottom of the pickling tank (1); A cleaning cylinder (4) is arranged on the inner wall of the pickling tank (1) and is used for loading metal silicon for pickling; A support mechanism (6) is provided on the inner wall of the guide groove (2) and is used to support the cleaning cylinder (4); A rotating mechanism (5) is provided on the inner wall of the guide groove (2) and is used to rotate the cleaning cylinder (4); A toggle mechanism (7) is provided in the cleaning cylinder (4) and is used to toggle the metal silicon inside the cleaning cylinder (4); Wherein, the supporting mechanism (6) comprises: Two pillars (61) are respectively fixedly connected to the bottom of the inner wall of the pickling tank (1); An arc-shaped support (62) is fixedly connected to the top of the support (61), and a rotating shaft (41) is fixedly connected to the axis of the cleaning cylinder (4), and the rotating shaft (41) is rotatably connected to the arc-shaped support (62) and is used to place the cleaning cylinder (4) in rotation; Two support rods (63) are symmetrically arranged on both sides of the arc-shaped support (62) and are fixedly connected to the arc-shaped support (62) and the pickling tank (1) respectively; A mixing assembly (64) is arranged inside the pickling tank (1) and is used to stir the pickling liquid.
2. The metallic silicon multiple pickling and purification equipment according to claim 1, characterized in that: The mixing assembly (64) comprises: Two arc-shaped plates (641) are symmetrically arranged on the inner wall of the pickling tank (1), and are arranged symmetrically on both sides; A groove is formed on one side of the arc-shaped support (62); An L-shaped rod (643) is movably connected to the arc-shaped support (62), one end of which is located in the groove and is connected to an arc-shaped push plate (644) for pushing the L-shaped rod (643) to move; The push rod (642) has two ends hinged to the arc plate (641) and the other end of the L-shaped rod (643) respectively, and is used to push (641) to move.
3. The multiple pickling and purification equipment for metallic silicon according to claim 2, characterized in that: The mixing assembly (64) further comprises: The middle portion of the swing rod (646) is rotatably connected to the support (61) via a pin, and both ends of the swing rod (646) are hinged to the arc-shaped plates (641) on both sides.
4. The metallic silicon multiple pickling and purification equipment according to claim 3, characterized in that: The rotating mechanism (5) comprises: A reciprocating screw (51) is arranged on the inner wall of the guide groove (2), and a fluororubber sealing ring is provided at the rotating portion; A slide rod (52) is fixedly connected to the inner wall of the guide groove (2); Two connecting rods (53) are spaced apart and arranged on the outer wall of the reciprocating screw rod (51), and are movably sleeved on the outer wall of the sliding rod (52) and move along with the rotation of the reciprocating screw rod (51); A rack (54) fixedly connected to one end of the two connecting rods (53); The gear (55) is fixedly connected to the outer wall of the cleaning cylinder (4), and the rack (54) is engaged with the gear (55). The rack (54) is used to drive the gear (55) to drive the cleaning cylinder (4) to rotate.
5. The metallic silicon multiple pickling and purification equipment according to claim 4, characterized in that: The toggle mechanism (7) comprises: Two connecting seats (71) are symmetrically connected to the outer walls of the hexagonal cleaning cylinder (4) at opposite corners; A plurality of levers (72) are movably passed through the rotating shaft (41), and the two ends of the levers are movably passed through the cleaning cylinder (4) and the connecting seat (71), the outer wall of the rotating shaft (41) is fixedly sleeved with an elliptical plate (645), and the outer wall of the arc plate (645) is in contact with the two arc push plates (644) for pushing the arc push plates (644) to move; Two arc-shaped abutting rods (73) are fixedly connected to the extended end of the shifting rod (72) and are used to push the shifting rod (72) to move; A plurality of toggle rods (74) are fixedly connected to the outer wall of the toggle rod (72) and move the metal silicon in response to the movement of the toggle rod (72); A toggle frame (75) is fixedly connected to an end of the toggle rod (74) away from the toggle rod (72); A plurality of arc-shaped wave rods (76) are respectively arranged on both sides of the inner wall of the pickling tank (1) and are symmetrical in front and back. The inner sides of the arc-shaped wave rods (76) are in contact with the arc-shaped abutting rods (73).
6. The metallic silicon multiple pickling and purification equipment according to claim 5, characterized in that: The crests and troughs of the arc-shaped wave rods (76) on the left and right sides are arranged in a staggered manner. The right arc-shaped wave rod (76) pushes the arc-shaped resistance rod (73) to drive the arc-shaped resistance rod (73) at the other end of the shifting rod (72) to resist the trough of the left arc-shaped wave rod (76).
7. The multiple pickling and purification equipment for metallic silicon according to claim 6, characterized in that: A turning mechanism (8) is also provided in the cleaning cylinder (4) for turning the metal silicon in the cleaning cylinder (4) so that the metal silicon turns along with the cleaning cylinder (4); The flipping mechanism (8) further comprises: A flip rod fixing seat (81) fixedly connected to the outer wall of the cleaning cylinder (4); A plurality of movable rods (82) are movably connected to the inner wall of the flip rod fixing seat (81) and movably penetrate the cleaning cylinder (4) and extend toward the interior thereof; An arc-shaped baffle (83) fixedly connected to the inner extension end of the movable rod (82); A resisting rod (87) is fixedly connected to the top of the movable rod (82) and resists the arc-shaped wave rod (76) on the right side; A limiting groove (86) is provided on the outer wall of the movable rod (82); A U-shaped sleeve (84) fixedly connected to the outer wall of the flip rod fixing seat (81); The limiting rod (85) is movably arranged in the U-shaped sleeve (84) and moves into the limiting groove (86) to limit the movable rod (82).
8. A method for multiple acid washing and purification of metallic silicon, used in the multiple acid washing and purification equipment for metallic silicon according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Pre-cleaning: preliminarily clean the metallic silicon raw material to remove dust, dirt and other impurities on the surface. Water washing or mechanical screening can be used; Step 2: First pickling: open the feed hatch on the cleaning cylinder (4), place the pre-cleaned metal silicon into the cleaning cylinder (4), and add an appropriate amount of acid to the pickling tank (1), such as hydrochloric acid, sulfuric acid or hydrofluoric acid. The acid concentration, pickling temperature and time are adjusted according to the impurity content and type of the metal silicon. Generally speaking, the hydrochloric acid concentration is between 10% and 30%, the temperature is around 50-80°C, and the pickling time is 1-3 hours; Step three, using a hoisting device to hang it on the outer wall of the rotating shaft (41), and moving it to a cleaning tank for cleaning until it is neutral, removing the acid and dissolved impurities remaining on the surface; Step 4: pickling for multiple times, placing the cleaned metal silicon into the second pickling tank (1) for a second pickling, taking it out and rinsing it after the pickling is completed, and then pickling it for a third time.