A device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process

Abstract

The present invention discloses a device for separating and extracting sodium pyroantimonate in the process of metal solid waste treatment, which relates to the technical field of metal solid waste treatment. The compensation of the acid solution is carried out in real time strictly according to the molar mass ratio of Sb2O3 to HCI in the leaching reaction process. At the same time when the reaction equilibrium is broken, the proportion adjustment will be made in real time in the form of adding compensated acid solution. Meanwhile, the compensated solution injected into the original reaction solution will be quickly mixed with the original reaction solution under the synchronous rotation and stirring of the secondary infusion pipe. Moreover, the compensated acid solution injected between the leaching bin and the decomposition bin will directly contact the original reaction solution, rather than directly contacting the waste residue. Therefore, it will not be blocked by the dense metal waste residue, enabling the compensated acid solution to be quickly and evenly mixed with the original reaction solution, effectively avoiding the problem of large-scale uneven reaction caused by the blocking of the dense metal waste residue, and thus ensuring that the reaction has been carried out stably under the state of high-precision proportioning.

Description

Technical Field

[0001] The invention relates to the technical field of metal solid waste treatment, in particular to a device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process. Background Art

[0002] Sodium pyroantimonate is a widely used antimony salt and a promising fine chemical product. It can be used as a high-quality clarifier in the production of TV tube glass shells and high-grade glass, a flame retardant for textiles and plastic products, an opaque filler for enamel and paint for castings. Currently, the industry mainly uses antimony oxide (antimony trioxide) as raw material to prepare and extract sodium pyroantimonate through oxidation reflux method.

[0003] Antimony trioxide, the main raw material for preparing sodium pyroantimonate, is generally extracted from metal smelting waste slag. The extraction steps are: 1. Waste slag pretreatment (physical screening, large-block crushing); 2. Core step: leaching the pretreated waste slag with acid or alkali to dissolve the antimony trioxide in the waste slag; 3. Extracting the dissolving solution and adjusting the pH value to precipitate the antimony trioxide and filter it out; 4. Finally, drying the antimony trioxide precipitate.

[0004] Generally speaking, it is more common to use acid leaching to leach antimony trioxide from waste slag, because antimony trioxide is an amphoteric oxide, which is more soluble in acidic media, and acid leaching is usually carried out at a lower pH value and room temperature to medium temperature. The reaction conditions are easy to control and operate. However, there are still some problems in the process of acid leaching antimony trioxide, as follows:

[0005] 1. Acid leaching reaction: whether hydrochloric acid or sulfuric acid is used as the leaching agent, a large amount of water will be produced. Therefore, the reaction rate is high at the beginning of the reaction. However, as the reaction proceeds, the water ratio in the solution gradually increases, resulting in a gradual decrease in the concentration of hydrochloric acid or sulfuric acid solution, and the leaching reaction will be gradually inhibited. As the reaction proceeds, antimony trioxide in the waste residue is gradually leached into the solution, which will cause the solubility of the solution to gradually decrease. Even if the influence of water on the reaction quality is eliminated, the reaction will be gradually inhibited as the solubility of the solution decreases;

[0006] Leaching reaction formula with hydrochloric acid and sulfuric acid:

[0007] Sb 2 O 3 + 6HCl → 2SbCl 3 + 3H 2 O;

[0008] Sb 2 O 3 + 3H2 S O 4 → Sb2 (SO4) 3 + 3H 2 O;

[0009] The current solution to the above problem is to add hydrochloric acid or sulfuric acid during the reaction to ensure the concentration of the acid solution. However, the existing additional addition of hydrochloric acid or sulfuric acid is only carried out after the reaction rate has been significantly reduced or even stopped. In fact, the problem has already occurred and it is not solved, and the dynamic equilibrium adaptation of the acid solution concentration cannot be achieved. Therefore, the overall solution effect is not ideal. In addition, a large amount of metal waste slag is accumulated in the traditional leaching reactor. It is difficult to quickly mix the added acid solution with the original solution through conventional injection and stirring methods. The waste slag in the area where the acid solution is injected reacts violently, while the reaction rate of the waste slag in the area far from the injection port is still low. Once a large degree of reaction unevenness occurs in the chemical reaction, it is a reaction out of control, because chemical reactions are strictly proportioned, and large-scale reaction unevenness will break the reaction ratio, resulting in the inability to accurately control subsequent reactions.

[0010] 2. Waste slag after metal smelting is often honeycomb-shaped. Even after pre-treatment and crushing, the small pieces of waste slag are still honeycomb-shaped. The honeycomb holes in the waste slag often carry gas, which will form an air film when immersed in the solution, hindering the penetration of the solution, resulting in poor reaction rate. Traditional stirring methods are also difficult to eliminate the influence of the air film on the reaction rate.

[0011] To this end, the present invention is innovatively designed based on the original device for separating and extracting sodium pyroantimonate in the metal solid waste treatment process. Summary of the invention

[0012] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a device for separating and extracting sodium antimonate in a metal solid waste treatment process, so as to solve the problem that the above-mentioned background technology proposes that the existing additional addition of hydrochloric acid or sulfuric acid is only carried out after the reaction rate has been significantly reduced or even the reaction has stopped. In fact, the problem has already occurred and it is not possible to achieve dynamic equilibrium adaptation of the acid solution concentration, so the overall solution effect is not ideal.

[0013] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for separating and extracting sodium antimonate in a metal solid waste treatment process, comprising a leaching bin, a driving motor invertedly mounted just above the leaching bin, and a liquid storage tank fixed to the side of the leaching bin, and also comprising a decomposition bin elastically mounted in the leaching bin and proportionally reduced by the leaching bin, a material distributor inside the decomposition bin for stirring, decomposing and crushing and exhausting, a negative pressure suction frame connected to the output rotor of the driving motor for real-time monitoring of the weight change inside the decomposition bin and adaptively injecting liquid, and secondary liquid infusion pipes distributed at equal angles outside the negative pressure suction frame for injecting and mixing the solution after the material and liquid are separated, the material distributor is composed of a material guide cone at the upper end and a Lelo triangle column located inside the decomposition bin, and a lifting universal transmission assembly is installed between the material guide cone and the negative pressure suction frame;

[0014] A sealed discharge end that slides through the bottom of the leaching bin is provided at an equal angle at the corner of the lower end of the decomposition bin, and a rubber sealing ring is provided between the discharge end and the through hole at the bottom of the leaching bin, and a liquid outlet is provided at the center of the bottom of the leaching bin.

[0015] Preferably, the leaching bin and the decomposition bin are both designed as square frames, and the inner and outer walls at the corners of the leaching bin and the decomposition bin are chamfered in equal proportions, and the three inflection points of the Lelo triangle column are always in contact with the inner wall of the decomposition bin, and the side walls of the decomposition bin are evenly provided with filter holes for the solution to pass through.

[0016] Preferably, a heating mechanism is installed on the outer wall of the leaching bin, and support rods are installed at equal angles between the leaching bin and the decomposition bin, and a support plate at the lower end of the support rod is fixedly connected to the side wall of the decomposition bin.

[0017] Preferably, a baffle is fixed to the inner wall of the leaching tank, and the upper end of the support rod slides through the baffle, a first spring is wrapped around the outer wall of the support rod, one end of the first spring is welded to the lower surface of the baffle, and the other end of the first spring is fixed to the upper surface of the support plate.

[0018] Preferably, the lower surface of the divider is in contact with the bottom surface of the decomposition bin, and a limiting groove is provided inside the divider, and a connecting block is provided inside the limiting groove with the lower end fixedly connected to the bottom surface of the decomposition bin, and sufficient space for the eccentric rotation of the divider is reserved between the limiting groove and the connecting block, and the disc at the upper end of the connecting block is always engaged in the disc groove at the upper end of the limiting groove, which plays a role of limiting connection between the divider and the decomposition bin in the vertical direction.

[0019] Preferably, the lifting universal transmission assembly includes a rectangular piston rod and a universal coupling, a negative pressure chamber is opened inside the negative pressure suction frame, and the upper end of the rectangular piston rod is slidably arranged inside the negative pressure chamber, and a rubber sealing ring is arranged between the rectangular piston rod and the inner wall of the negative pressure chamber, the lower end of the rectangular piston rod passes through the negative pressure suction frame and is fixedly connected to the upper end of the universal coupling, and the lower end of the universal coupling is fixedly connected to the upper end of the distributor.

[0020] Preferably, an upper liquid cavity is provided inside the output rotor of the driving motor, and a sealing ring is rotatably mounted on the outer wall of the output rotor, and sealed bearings are installed between the upper and lower ends of the sealing ring and the output rotor, the sealing ring is hollow in design and one end of a liquid inlet pipe is connected to the side, and the other end of the liquid inlet pipe is connected to the liquid storage tank, and through holes for liquid inlet are provided at equal angles between the upper liquid cavity and the hollow cavity of the sealing ring.

[0021] Preferably, a first valve ball is arranged in the flared first connecting channel between the upper liquid chamber inside the output rotor and the negative pressure chamber inside the negative pressure suction frame, and the flaring direction is from the upper liquid chamber toward the negative pressure chamber, a first baffle is fixed to the inner wall of the end of the first connecting channel away from the upper liquid chamber, and one end of a first microspring is fixed to the outer wall of the first baffle, and the other end of the first microspring is fixed to the outer wall of the first valve ball.

[0022] Preferably, a first-level infusion tube is arranged at an equal angle through the side of the upper end of the negative pressure suction frame, and a second valve ball is arranged in the flared second connecting channel between the first-level infusion tube and the negative pressure chamber, and the flaring direction is from the negative pressure chamber toward the inside of the first-level infusion tube, a second baffle is fixed to the inner wall of the end of the second connecting channel away from the negative pressure chamber, and one end of a second microspring is fixed to the outer wall of the second baffle, and the other end of the second microspring is fixed to the outer wall of the second valve ball.

[0023] Preferably, the secondary infusion tube is L-shaped and is distributed at equal angles on the side of the negative pressure suction frame, the upper end of the secondary infusion tube is piston-slidably arranged inside the primary infusion tube, and the lower end of the secondary infusion tube is inserted into the liquid storage interval between the leaching bin and the decomposition bin;

[0024] The outer wall of the secondary infusion tube located inside the primary infusion tube is wound with a second spring, one end of the second spring is welded to the inner wall of the primary infusion tube, and the other end of the second spring is fixed to the end of the secondary infusion tube;

[0025] The outer wall of the lower end of the secondary infusion tube is rotatably provided with a guide turntable respectively fitted with the inner wall of the leaching bin and the outer wall of the decomposition bin, and stirring blades are evenly spacedly installed on the outer wall of the lower end of the secondary infusion tube.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] When the metal waste slag is not poured into the decomposition bin, the decomposition bin and the distributor are lifted to the highest position by the first springs, and the piston end of the rectangular piston rod is located in the upper area of ​​the negative pressure chamber. When the metal waste slag is gradually poured into the decomposition bin, the weight of the decomposition bin and the distributor gradually increases, causing the decomposition bin and the distributor to gradually fall, driving the rectangular piston rod to fall along the negative pressure chamber, causing negative pressure suction to be generated in the negative pressure chamber, thereby opening the liquid inlet one-way valve inside the first connecting channel between the upper liquid chamber and the negative pressure chamber, and pumping the acid solution inside the liquid storage tank into the negative pressure chamber in the negative pressure suction frame for temporary storage. As the leaching reaction proceeds, antimony trioxide gradually dissolves in the solution, causing the overall weight of the waste residue to gradually decrease. As a result, under the elastic action of the first spring, the decomposition chamber, the distributor, the universal coupling and the rectangular piston rod gradually return to their original positions and rise upward, generating a positive squeezing force on the compensating acid solution in the negative pressure chamber, thereby opening the liquid outlet one-way valve in the second connecting channel between the negative pressure chamber and the primary infusion pipe, allowing the compensating acid solution in the negative pressure chamber to be adaptively injected into the primary infusion pipe as the antimony trioxide in the decomposition chamber dissolves, and then output to the leaching chamber through the secondary infusion pipe for compensation.

[0028] The effects achieved are:

[0029] 1. The compensation of acid solution is strictly in accordance with the Sb 2 O 3 The molar mass ratio with HCl is adjusted in real time. When the reaction balance is broken, the ratio will be adjusted by adding compensating acid solution, instead of waiting for the reaction rate to drop significantly before solving the problem. This ensures the stable and efficient progress of the reaction.

[0030] 2. At the same time, the compensating solution injected into the original reaction liquid from the lower end of the secondary infusion tube according to the above ratio will be quickly mixed with the original reaction liquid under the dual stirring action of the synchronous rotation of the secondary infusion tube and the stirring blade outside the secondary infusion tube, and the compensating acid solution injected between the leaching bin and the decomposition bin will directly contact the original reaction liquid instead of directly contacting the waste residue, so it will not be blocked by the dense metal waste residue, so that the compensating acid solution can be quickly and evenly mixed with the original reaction liquid, effectively avoiding the problem of large-scale reaction unevenness caused by the blocking effect of dense metal waste residue, thereby ensuring that the reaction is always in a high-precision ratio state and is stable, and ensuring the controllability of the reaction;

[0031] 3. When the waste slag is stirred, the output rotor drives the negative pressure suction frame and the secondary infusion tubes, rectangular piston rods and universal couplings distributed at equal angles on the sides of the negative pressure suction frame to rotate synchronously. At the same time, the universal coupling drives the distributor to rotate in an eccentric rotation posture on the inner wall of the decomposition bin in a rolling manner. The metal waste slag inside the decomposition bin is crushed by the extrusion force between the Lelo triangle column at the lower end of the distributor and the inner wall of the decomposition bin, so that the gas hidden in the honeycomb holes of the metal smelting waste slag can be discharged, thereby preventing the formation of an air film in the honeycomb holes to affect the leaching reaction of the waste slag and the solution. At the same time, the distributor has a good stirring effect on the material while crushing the waste slag, thereby achieving an overall effect of accelerating the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention.

[0033] Figure 2 It is a first stereoscopic schematic diagram of the present invention.

[0034] Figure 3 It is a second stereoscopic schematic diagram of the present invention.

[0035] Figure 4 It is a three-dimensional schematic diagram of the present invention after the leaching bin is removed.

[0036] Figure 5 It is a three-dimensional schematic diagram of the present invention after the leaching chamber and the decomposition chamber are removed.

[0037] Figure 6 It is a three-dimensional schematic diagram of the distributor of the present invention.

[0038] Figure 7 It is a three-dimensional schematic diagram of the material distributor of the present invention after being cut open.

[0039] Figure 8 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0040] Fig. 9 It is a schematic diagram of the rotation trajectory of the center point of the distributor of the present invention.

[0041] In the figure: 1. leaching chamber; 11. heating mechanism; 2. decomposition chamber; 21. support rod; 22. first spring; 3. distributor; 31. limit groove; 32. connection block; 4. drive motor; 41. negative pressure suction frame; 42. rectangular piston rod; 43. universal coupling; 5. liquid storage tank; 51. liquid inlet pipe; 52. sealing ring; 53. first valve ball; 6. primary infusion pipe; 61. second spring; 62. second valve ball; 7. secondary infusion pipe; 71. guide turntable; 72. stirring blade. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 9 The present invention provides a technical solution: a device for separating and extracting sodium antimonate in a metal solid waste treatment process, comprising a leaching bin 1, a driving motor 4 invertedly mounted just above the leaching bin 1, and a liquid storage tank 5 fixed to the side of the leaching bin 1, and also comprising a decomposition bin 2 elastically mounted in the leaching bin 1 and proportionally reduced by the leaching bin 1, a distributor 3 inside the decomposition bin 2 for stirring, decomposing and crushing and exhausting, a negative pressure suction frame 41 connected to the output rotor of the driving motor 4 for real-time monitoring of the weight change inside the decomposition bin 2 and adaptive liquid injection, and secondary liquid infusion pipes 7 distributed at equal angles outside the negative pressure suction frame 41 for filling and mixing the solution after the material and liquid are separated, the distributor 3 is composed of a material guide cone at the upper end and a Lelo triangle column located inside the decomposition bin 2, and a lifting universal transmission component is installed between the material guide cone and the negative pressure suction frame 41;

[0044] A plugging discharge end that slides through the bottom of the leaching bin 1 is provided at an equal angle at the corner of the lower end of the decomposition bin 2, and a rubber sealing ring is provided between the discharge end and the through hole at the bottom of the leaching bin 1, and a liquid outlet is provided at the center of the bottom of the leaching bin 1.

[0045] The leaching tank 1 and the decomposition tank 2 are both designed as square frames, and the inner and outer walls at the corners of the leaching tank 1 and the decomposition tank 2 are chamfered in equal proportions, and the three turning points of the Lelo triangle column are always in contact with the inner wall of the decomposition tank 2, and the side walls of the decomposition tank 2 are evenly provided with filter holes for the solution to pass through.

[0046] A heating mechanism 11 is installed on the outer wall of the leaching bin 1 , and support rods 21 are installed at equal angles between the leaching bin 1 and the decomposition bin 2 , and a support plate at the lower end of the support rod 21 is fixedly connected to the side wall of the decomposition bin 2 .

[0047] A baffle is fixed to the inner wall of the leaching tank 1, and the upper end of the support rod 21 slides through the baffle, the outer wall of the support rod 21 is wrapped with a first spring 22, and one end of the first spring 22 is welded to the lower surface of the baffle, and the other end of the first spring 22 is fixed to the upper surface of the support plate.

[0048] The lower surface of the divider 3 is fitted with the bottom surface of the decomposition bin 2, and a limiting groove 31 is opened inside the divider 3, and a connecting block 32 with a lower end fixedly connected to the bottom surface of the decomposition bin 2 is arranged inside the limiting groove 31. Sufficient space for the eccentric rotation of the divider 3 is reserved between the limiting groove 31 and the connecting block 32, and the disc at the upper end of the connecting block 32 is always engaged in the disc groove at the upper end of the limiting groove 31, which plays a role of limiting connection between the divider 3 and the decomposition bin 2 in the vertical direction.

[0049] The lifting universal transmission assembly includes a rectangular piston rod 42 and a universal coupling 43. A negative pressure chamber is opened inside the negative pressure suction frame 41, and the upper end of the rectangular piston rod 42 is slidably arranged inside the negative pressure chamber, and a rubber sealing ring is arranged between the rectangular piston rod 42 and the inner wall of the negative pressure chamber. The lower end of the rectangular piston rod 42 passes through the negative pressure suction frame 41 and is fixedly connected to the upper end of the universal coupling 43, and the lower end of the universal coupling 43 is fixedly connected to the upper end of the distributor 3.

[0050] An upper liquid chamber is provided inside the output rotor of the driving motor 4, and a sealing ring 52 is rotatably installed on the outer wall of the output rotor, and sealed bearings are installed between the upper and lower ends of the sealing ring 52 and the output rotor. The sealing ring 52 is hollow in design and one end of a liquid inlet pipe 51 is connected to the side, and the other end of the liquid inlet pipe 51 is connected to the liquid storage tank 5, and through holes for liquid inlet are provided at equal angles between the upper liquid chamber and the hollow cavity of the sealing ring 52.

[0051] A first valve ball 53 is arranged in the flared first connecting channel between the upper liquid chamber inside the output rotor and the negative pressure chamber inside the negative pressure suction frame 41, and the flaring direction is from the upper liquid chamber toward the negative pressure chamber, a first baffle is fixed to the inner wall of the end of the first connecting channel away from the upper liquid chamber, and one end of a first microspring is fixed to the outer wall of the first baffle, and the other end of the first microspring is fixed to the outer wall of the first valve ball 53.

[0052] A first-level infusion tube 6 is arranged at an equal angle through the side of the upper end of the negative pressure suction frame 41, and a second valve ball 62 is arranged in the flared second connecting channel between the first-level infusion tube 6 and the negative pressure chamber, and the flaring direction is from the negative pressure chamber toward the inside of the first-level infusion tube 6, a second baffle is fixed to the inner wall of the end of the second connecting channel away from the negative pressure chamber, and one end of the second microspring is fixed to the outer wall of the second baffle, and the other end of the second microspring is fixed to the outer wall of the second valve ball 62.

[0053] The secondary infusion tube 7 is L-shaped and is distributed at equal angles on the side of the negative pressure suction frame 41. The upper end of the secondary infusion tube 7 is piston-slidably disposed inside the primary infusion tube 6, and the lower end of the secondary infusion tube 7 is inserted into the liquid storage interval between the leaching chamber 1 and the decomposition chamber 2.

[0054] The outer wall of the secondary infusion tube 7 located inside the primary infusion tube 6 is wound with a second spring 61, and one end of the second spring 61 is welded to the inner wall of the primary infusion tube 6, and the other end of the second spring 61 is fixed to the end of the secondary infusion tube 7;

[0055] The outer wall of the lower end of the secondary infusion tube 7 is rotatably provided with a guide turntable 71 which is respectively in contact with the inner wall of the leaching chamber 1 and the outer wall of the decomposition chamber 2, and stirring blades 72 are evenly spacedly installed on the outer wall of the lower end of the secondary infusion tube 7.

[0056] Working principle: When using the device for separating and extracting sodium antimonate in the process of metal solid waste treatment, first pour the pre-treated and crushed metal smelting waste slag into the space between the decomposition bin 2 and the distributor 3. The guide cone at the upper end of the decomposition bin 2 is used to prevent the waste slag from falling into the decomposition bin 2. Then, the acid solution (hydrochloric acid / sulfuric acid) obtained by proportioning is added to the square interval between the leaching bin 1 and the decomposition bin 2. The added acid solution will enter the decomposition bin 2 through the filter holes evenly distributed on the side of the decomposition bin 2 and fully contact with the metal waste slag in the decomposition bin 2.

[0057] When the metal waste slag is not poured into the decomposition bin 2, Figure 1 and Figure 4 As shown, under the elastic cooperation between the multiple groups of support rods 21 and the first springs 22, the decomposition bin 2 and the distributor 3 are lifted to the highest position by the multiple first springs 22, and the piston end of the rectangular piston rod 42 is located in the upper area of ​​the negative pressure chamber. When the metal waste is gradually poured into the decomposition bin 2, the weight of the decomposition bin 2 and the distributor 3 gradually increases, causing the decomposition bin 2 and the distributor 3 to gradually fall, compressing the first spring 22 and synchronously pulling down the rectangular piston rod 42 through the universal coupling 43. The rectangular piston rod 42 falls along the negative pressure chamber, which will generate negative pressure suction in the negative pressure chamber, thereby connecting the upper liquid chamber with the first connection between the negative pressure chamber. The liquid inlet one-way valve inside the channel is opened (liquid inlet one-way valve: the first valve ball 53 compresses the first microspring to create a gap between the first valve ball 53 and the first connecting channel, thereby opening the first connecting channel). At this time, under the negative pressure suction of the negative pressure chamber, the acid solution inside the liquid storage tank 5 (the acid solution here is the compensating acid solution that needs to be compensated and enter the leaching tank 1 to balance the reaction later) will pass through the liquid inlet pipe 51, the sealing ring 52, the upper liquid chamber and the first connecting channel in turn and be negatively pumped by negative pressure to the negative pressure chamber in the negative pressure suction frame 41 for temporary storage. The more metal waste slag is added, the more compensating acid solution is temporarily stored in the negative pressure chamber.

[0058] Next, the drive motor 4 is started, and the output rotor at the lower end of the drive motor 4 synchronously drives the negative pressure suction frame 41 and the secondary infusion tube 7, the rectangular piston rod 42, and the universal coupling 43 which are evenly distributed on the side of the negative pressure suction frame 41 to rotate synchronously, and the sealing ring 52 and the liquid inlet pipe 51 remain stationary. At the same time, the universal coupling 43 drives the distributor 3 to rotate in an eccentric rotation posture on the inner wall of the decomposition bin 2 in a rolling manner (the rotation center motion trajectory of the distributor 3 is shown in FIG. 1 ). Fig. 9 ), the metal waste slag inside the decomposition bin 2 is crushed by the squeezing force between the Lelo triangle column at the lower end of the distributor 3 and the inner wall of the decomposition bin 2, so that the gas hidden in the honeycomb holes of the metal smelting waste slag can be discharged, thereby preventing the honeycomb holes from forming an air film that affects the leaching reaction between the waste slag and the solution. At the same time, the distributor 3 has a good stirring effect on the material while crushing the waste slag, thereby achieving an overall effect of accelerating the reaction. Moreover, as the reaction proceeds, antimony trioxide in the waste slag will be converted into antimony ions and corresponding anions in the solution, and the entire system is a uniform liquid solution.

[0059] As the leaching reaction continues to proceed efficiently, antimony trioxide gradually dissolves in the solution, causing the weight of the entire waste residue to gradually decrease. As a result, under the elastic action of the first spring 22, the decomposition bin 2, the distributor 3, the universal coupling 43 and the rectangular piston rod 42 gradually return to their original position and rise upward. Figure 8 As shown, the rectangular piston rod 42 gradually resets and rises upward, and generates a positive squeezing force on the compensating acid solution in the negative pressure chamber, thereby opening the liquid outlet one-way valve inside the second connecting channel between the negative pressure chamber and the primary infusion tube 6 (liquid outlet one-way valve: the second valve ball 62 compresses the second micro spring to generate a gap between the second valve ball 62 and the second connecting channel, thereby opening the second connecting channel), so that the compensating acid solution inside the negative pressure chamber is adaptively injected into the primary infusion tube 6 as the antimony trioxide inside the decomposition chamber 2 is dissolved, and then output to the inside of the leaching chamber 1 through the secondary infusion tube 7;

[0060] Using hydrochloric acid (HCl) to leach antimony trioxide (Sb 2 O 3 ) can be expressed as the following chemical equation: Sb 2 O 3 + 6HCl → 2SbCl 3 + 3H 2 O;

[0061] According to the chemical reaction equation, 1 mole of Sb 2 O 3 6 moles of HCl are needed. The theoretical mass ratio is calculated based on the molar mass: antimony trioxide (Sb 2 O 3The molar mass of ) is about: 2x121.76 (Sb) + 3x16 (0) = 291.52 g / mol, and the molar mass of hydrochloric acid (HCl) is about: 1 (H) + 35.45 (Cl) = 36.45 g / mol;

[0062] This means that theoretically, every 291.52 grams of antimony trioxide requires approximately 218.7 grams of hydrochloric acid.

[0063] Therefore, in theory, the mass ratio of acid to antimony trioxide is: 218.7÷291.52≈0.75. Therefore, it can be theoretically considered that for every 1 specific gravity reduction in the weight of the decomposition chamber 2, a 0.75 specific gravity compensation acid solution needs to be injected into the original reaction solution to compensate for the required reaction ratio. Moreover, the compensation of the above acid solution is strictly in accordance with the Sb trioxide in the leaching reaction process. 2 O 3 The molar mass ratio with HCl is carried out in real time. At the same time when the reaction equilibrium is broken, the ratio will be adjusted by adding compensating acid solution, instead of waiting for the reaction rate to drop significantly to solve the problem, thus ensuring the stable and efficient progress of the reaction.

[0064] At the same time, the compensation solution injected into the original reaction liquid from the lower end of the secondary infusion tube 7 according to the above ratio will be quickly mixed with the original reaction liquid under the dual stirring action of the synchronous rotation of the secondary infusion tube 7 and the stirring blade 72 outside the secondary infusion tube 7 (the secondary infusion tube 7 can be synchronously freely expanded and contracted in the form of compressing the second spring 61 inside the primary infusion tube 6 when rotating with the negative pressure suction frame 41 to adapt to different centrifugal distances), and the compensation acid solution injected between the leaching bin 1 and the decomposition bin 2 will directly contact the original reaction liquid instead of directly contacting the waste residue, so it will not be blocked by the dense metal waste residue, so that the compensation acid solution can be quickly and evenly mixed with the original reaction liquid, and the problem of large-scale reaction unevenness caused by the blocking effect of dense metal waste residue is effectively avoided, thereby ensuring that the reaction is always carried out stably in a high-precision ratio state, and ensuring the controllability of the reaction. After the final reaction is completed, the liquid outlet at the lower end of the leaching bin 1 and the material outlet at the lower end of the decomposition bin 2 can be opened to respectively take out the antimony trioxide solution and the unreacted metal waste residue.

[0065] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for separating and extracting sodium antimonate in a metal solid waste treatment process, comprising a leaching chamber (1), a driving motor (4) invertedly mounted just above the leaching chamber (1), and a liquid storage tank (5) fixed to the side of the leaching chamber (1), characterized in that: It also includes a decomposition chamber (2) elastically mounted in the leaching chamber (1) and proportionally reduced from the leaching chamber (1), a material distributor (3) inside the decomposition chamber (2) for stirring, decomposing and crushing materials for exhaust, a negative pressure suction frame (41) connected to the output rotor of the driving motor (4) for real-time monitoring of weight changes inside the decomposition chamber (2) and for adaptively injecting liquid, and secondary liquid infusion pipes (7) distributed at equal angles outside the negative pressure suction frame (41) for injecting and mixing the solution after the material and liquid are separated. The material distributor (3) is composed of a material guide cone at the upper end and a Lelo triangle column located inside the decomposition chamber (2), and a lifting universal transmission component is installed between the material guide cone and the negative pressure suction frame (41); A plugging-type discharge end is provided at an equal angle at the corner of the lower end of the decomposition bin (2) and slides through the bottom of the leaching bin (1), and a rubber sealing ring is provided between the discharge end and the through hole at the bottom of the leaching bin (1), and a liquid outlet is provided at the center of the bottom of the leaching bin (1); The lower surface of the distributor (3) is fitted with the bottom surface of the decomposition bin (2), and a limiting groove (31) is provided inside the distributor (3), and a connecting block (32) is provided inside the limiting groove (31), the lower end of which is fixedly connected to the bottom surface of the decomposition bin (2), and sufficient space for the distributor (3) to rotate eccentrically is reserved between the limiting groove (31) and the connecting block (32), and the disc at the upper end of the connecting block (32) is always engaged in the disc groove at the upper end of the limiting groove (31), so as to play a role in limiting the connection between the distributor (3) and the decomposition bin (2) in the vertical direction; The side wall of the decomposition chamber (2) is evenly provided with filter holes through which the solution can pass; The lifting universal transmission assembly comprises a rectangular piston rod (42) and a universal coupling (43); a negative pressure chamber is provided inside the negative pressure suction frame (41); the upper end of the rectangular piston rod (42) is slidably arranged inside the negative pressure chamber; a rubber sealing ring is arranged between the rectangular piston rod (42) and the inner wall of the negative pressure chamber; the lower end of the rectangular piston rod (42) passes through the negative pressure suction frame (41) and is fixedly connected to the upper end of the universal coupling (43); and the lower end of the universal coupling (43) is fixedly connected to the upper end of the distributor (3); An upper liquid cavity is provided inside the output rotor of the drive motor (4), and a sealing ring (52) is rotatably mounted on the outer wall of the output rotor, and sealed bearings are mounted between the upper and lower ends of the sealing ring (52) and the output rotor, the sealing ring (52) is of hollow design and one end of a liquid inlet pipe (51) is connected to the side, and the other end of the liquid inlet pipe (51) is connected to the liquid storage tank (5), and through holes for liquid inlet are provided at equal angles between the upper liquid cavity and the hollow cavity of the sealing ring (52); A first valve ball (53) is provided in the expanded first connecting channel between the upper liquid chamber inside the output rotor and the negative pressure chamber inside the negative pressure suction frame (41), and the expansion direction is from the upper liquid chamber toward the negative pressure chamber; A first-level infusion tube (6) is provided at an equal angle through the side of the upper end of the negative pressure suction frame (41), and a second valve ball (62) is provided in the expanded second connecting channel between the first-level infusion tube (6) and the negative pressure chamber, and the expansion direction is from the negative pressure chamber toward the inside of the first-level infusion tube (6).

2. The device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process according to claim 1, characterized in that: The leaching chamber (1) and the decomposition chamber (2) are both designed as square frames, and the inner and outer walls at the corners of the leaching chamber (1) and the decomposition chamber (2) are chamfered in equal proportions, and the three inflection points of the Lelo triangle column are in contact with the inner wall of the decomposition chamber (2) at all times.

3. The device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process according to claim 1, characterized in that: The outer wall of the leaching bin (1) is installed with a heating mechanism (11), and support rods (21) are installed at equal angles between the leaching bin (1) and the decomposition bin (2), and the support plates at the lower ends of the support rods (21) are fixedly connected to the side walls of the decomposition bin (2).

4. The device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process according to claim 2, characterized in that: A baffle is fixed to the inner wall of the leaching tank (1), and the upper end of the support rod (21) slides through the baffle, a first spring (22) is wound around the outer wall of the support rod (21), one end of the first spring (22) is welded to the lower surface of the baffle, and the other end of the first spring (22) is fixed to the upper surface of the support plate.

5. The device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process according to claim 4, characterized in that: A first stopper is fixed to the inner wall of the end of the first connecting channel away from the upper liquid chamber, and one end of a first microspring is fixed to the outer wall of the first stopper, and the other end of the first microspring is fixed to the outer wall of the first valve ball (53).

6. The device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process according to claim 1, characterized in that: A second baffle rod is fixed to the inner wall of the end of the second connecting channel away from the negative pressure chamber, and one end of a second microspring is fixed to the outer wall of the second baffle rod, and the other end of the second microspring is fixed to the outer wall of the second valve ball (62).

7. The device for separating and extracting sodium pyroantimonate in a metal solid waste treatment process according to claim 6, characterized in that: The secondary infusion tube (7) is L-shaped and is distributed at equal angles on the side of the negative pressure suction frame (41); the upper end of the secondary infusion tube (7) is piston-slidably disposed inside the primary infusion tube (6), and the lower end of the secondary infusion tube (7) is inserted into the liquid storage space between the leaching chamber (1) and the decomposition chamber (2); The outer wall of the secondary infusion tube (7) located inside the primary infusion tube (6) is wound with a second spring (61), one end of the second spring (61) is welded to the inner wall of the primary infusion tube (6), and the other end of the second spring (61) is fixed to the end of the secondary infusion tube (7); The outer wall of the lower end of the secondary liquid infusion tube (7) is rotatably provided with a guide turntable (71) respectively fitted with the inner wall of the leaching chamber (1) and the outer wall of the decomposition chamber (2), and stirring blades (72) are evenly spacedly installed on the outer wall of the lower end of the secondary liquid infusion tube (7).

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