A lead-free metallurgical device and a metallurgical method

Abstract

The present invention discloses a lead-free carbon metallurgical device and a metallurgical method, belonging to the field of lead-free carbon metallurgy. It includes a metallurgical equipment housing. A low-temperature heating chamber is provided in the metallurgical equipment housing, and an exhaust chamber is also provided in the metallurgical equipment housing. A material fishing rod is further arranged in the low-temperature heating chamber. The material fishing rod can fish the flying materials in the low-temperature heating chamber into the high-temperature reduction chamber. A turning-up assembly for turning the materials at the bottom of the low-temperature heating chamber is arranged in the low-temperature heating chamber. By setting the turning-up assembly, the turning-up assembly can push up the lead sulfide particles, making them fly in the low-temperature heating chamber. This process helps to improve the heating uniformity of the lead sulfide particles, enabling those parts of the lead sulfide particles that cannot be fully contacted with oxygen to react fully with oxygen. In this way, within the same oxidation time, more lead sulfide particles can be oxidized, effectively improving the oxidation rate. Through this method, the oxidation efficiency of lead sulfide can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of lead-free metallurgy, and more specifically, to a lead-free metallurgy device and a metallurgy method. Background Art

[0002] Lead-free metallurgy is a method that does not involve lead carbide in the metallurgical process. This method usually involves using alternative substances such as lead oxide and achieving the desired metallurgical effect through specific heating and treatment processes. In this process, lead sulfide particles are oxidized in a low-temperature heating chamber, and the lead-free metallurgical process may involve different treatment steps and equipment settings to ensure the desired oxidation efficiency and product quality.

[0003] The current technology of lead-free metallurgy adopts the condition of 400 - 750 degrees Celsius, putting air and lead sulfide into the equipment, oxidizing lead sulfide into lead oxide, and then adopting the hydrogen reduction method to reduce lead oxide into lead in a high-temperature reduction chamber. During the process of oxidizing lead sulfide into lead oxide, mostly the way of placing lead sulfide on an inclined vibrating screen and heating it with air is adopted. When the lead sulfide material falls on the vibrating screen and is heated and oxidized, since the later-fed lead sulfide will cover the surface of the previously-fed lead sulfide, the previously-fed lead sulfide cannot be in full contact with air, resulting in extremely low oxidation efficiency. Only by setting the vibrating screen long enough can the lead sulfide particles at the bottom be in full contact with air and react. Due to the vibrating screen being set long enough, the residence time of lead sulfide on the vibrating screen is too long, which will lead to too long waiting time when starting to oxidize lead sulfide, and the oxidized lead sulfide can enter the high-temperature reduction chamber for treatment, further resulting in low oxidation efficiency of lead sulfide during the oxidation process. For this reason, a lead-free metallurgy device and a metallurgy method are proposed. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a hanging device for lead-free metallurgy that can judge the position of the center of gravity of the material and adjust the center of gravity of the material.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A lead-free metallurgical device, comprising a metallurgical equipment housing, a low-temperature heating chamber is provided in the metallurgical equipment housing, an exhaust chamber is further provided in the metallurgical equipment housing, the exhaust chamber is located at the bottom of the low-temperature heating chamber, a high-temperature reduction chamber is rotatably provided on the outer surface of the metallurgical equipment housing, a material fishing rod is further provided in the low-temperature heating chamber, and the material fishing rod can fish the flying materials in the low-temperature heating chamber into the high-temperature reduction chamber. A mesh hole for gas passage is provided at the bottom of the low-temperature heating chamber, and the mesh hole is used to connect the low-temperature heating chamber and the exhaust chamber. An exhaust pipe communicating with the outside is provided in the exhaust chamber. A suction pipe for feeding is provided in the low-temperature heating chamber, an air inlet pipe for introducing air is provided in the low-temperature heating chamber, and a turning-up assembly for turning the materials at the bottom of the low-temperature heating chamber is provided in the low-temperature heating chamber. The turning-up assembly includes a driving motor fixedly installed inside the metallurgical equipment housing, the output end of the driving motor is fixedly connected to a reciprocating lead screw, the reciprocating lead screw is located in the low-temperature heating chamber, a collar is fixedly sleeved on the non-threaded part at the bottom of the reciprocating lead screw, and a shovel rod for turning up the materials is fixedly connected to the outer surface of the collar.

[0007] Further, an intermittent assembly cooperating with the reciprocating lead screw is provided in the low-temperature heating chamber. The intermittent assembly includes a ring sleeve plate fixedly sleeved on the outer surface of the reciprocating lead screw. A ring cavity is provided in the ring sleeve plate. A first gear rotatably sleeved on the outer surface of the reciprocating lead screw is provided in the ring cavity. A second gear fixedly sleeved on the outer surface of the reciprocating lead screw is further provided in the ring cavity. A shaft rod is rotatably installed at the bottom of the inner wall of the ring cavity. A third gear is fixedly sleeved on the outer surface of the bottom of the shaft rod. A transmission wheel is fixedly sleeved on the outer surface of the top of the shaft rod, and a half-circle tooth row is fixedly connected to the outer surface of the transmission wheel. The transmission wheel is meshed with the first gear through the half-circle tooth row, and the second gear is meshed with the third gear.

[0008] Further, a material fishing rod is fixedly connected to the outer surface of the first gear. The material fishing rod is divided into two parts: a connecting rod and a material fishing hopper. The connecting rod is an L-shaped rod, and a material groove is formed inside the connecting rod. An electric push rod is fixedly connected to the inner wall of the material groove on the side away from the material fishing hopper. The telescopic end of the electric push rod is fixedly connected to a first push plate. A conductive spring is fixedly connected to the inner wall of the material groove on the side close to the material fishing hopper. One end of the conductive spring away from the material fishing hopper is fixedly connected to the first push plate. A second push plate is slidably arranged at one end of the material groove close to the material fishing hopper. The first push plate and the second push plate are fixedly connected by a soft steel wire. The first push plate can slide in the material groove. A half-circle of contraction grooves is equidistantly formed in the inner circumference of the transmission wheel. A contraction tooth is arranged in each contraction groove. When the transmission wheel rotates, the contraction tooth contacts the tooth row of the first gear. The contraction teeth are arranged in the half-circle of the outer surface of the transmission wheel without a tooth row. The contraction tooth includes a pressure sensor fixedly installed on the inner wall of the contraction groove. A return spring and a contraction block are also arranged in the contraction groove, and the contraction block is elastically connected to the pressure sensor through the return spring.

[0009] Further, a material receiving pipe is fixedly inserted into the material groove. When the conductive spring is not energized, the first push plate can connect the material groove with the high-temperature reduction chamber. The material receiving pipe is a bent pipe. A rotatable rotating ring is arranged on the inner wall of the metallurgical equipment housing. The material receiving pipe passes through the rotating ring and is connected to the high-temperature reduction chamber.

[0010] Further, a reduction gas inlet pipe is fixedly inserted into the upper end of the high-temperature reduction chamber, and a discharge pipe is fixedly inserted into the lower end of the high-temperature reduction chamber. Hydrogen can be introduced into the high-temperature reduction chamber from the outside through the reduction gas inlet pipe. The hydrogen concentration in the high-temperature reduction chamber is greater than the gas concentration in the low-temperature heating chamber. A one-way valve is arranged inside the material receiving pipe, and the direction of the one-way valve inside the material receiving pipe allows materials to enter the high-temperature reduction chamber from the material groove.

[0011] Further, a feeding component used in cooperation with the material suction pipe is arranged inside the high-temperature reduction chamber. The feeding component includes a corrugated pipe movably sleeved on the outer surface of a reciprocating lead screw. A rotating ring is rotatably sleeved on the non-threaded part at the top of the reciprocating lead screw. A lead screw sleeve is sleeved on the reciprocating lead screw. The top end of the corrugated pipe is fixedly connected to a ring shaft. The bottom end of the corrugated pipe is fixedly connected to the lead screw sleeve. A hole for air intake is arranged on the ring shaft, and a one-way valve for introducing air into the ring shaft is arranged in the hole. The ring shaft is communicated with the inside of the corrugated pipe. An air pipe is also inserted into the ring shaft, and the bottom end of the air pipe is inserted on the material suction pipe. A one-way valve is arranged inside the material suction pipe, and the one-way valve inside the material suction pipe allows the material suction pipe to feed materials from the outside of the low-temperature heating chamber into the low-temperature heating chamber.

[0012] Further, the shovel rod is a push rod composed of multiple plow-shaped structures. The lowest point of the shovel rod contacts the bottom of the low-temperature heating chamber. The mesh diameter at the bottom of the low-temperature heating chamber is six millimeters. The horizontal position of the suction pipe is the same as the horizontal position of the highest point of the shovel rod.

[0013] Further, the air pressure in the intake pipe is greater than the gravity of the raw material particles. The intake pipe and the suction pipe are symmetrically arranged on both sides of the metallurgical equipment housing.

[0014] Further, when the conductive spring is powered off, its own elastic force is greater than the resistance of the electric push rod. The conductive spring and the electric push rod are electrically connected to the data processing unit, and the pressure sensor is electrically connected to the data processing unit.

[0015] A metallurgical method for a lead-free carbon metallurgical device

[0016] S1: Through the suction pipe and the intake pipe, the crushed lead sulfide and air are blown into the low-temperature heating chamber with an internal temperature of 400 - 750 °C. The drive motor works to drive the shovel rod, causing the lead sulfide material accumulated at the bottom of the low-temperature heating chamber to be turned over, and the lead sulfide material is separated from each other and dispersed throughout the low-temperature heating chamber.

[0017] S2: The lead sulfide particles turned over by the shovel rod fly to the highest point of the shovel rod. With the operation of the suction pipe and the intake pipe, the air entering the low-temperature heating chamber subsequently will impact the flying lead sulfide, improving the uniformity of the lead sulfide being heated when it is turned over by the shovel rod. The lead sulfide material entering the low-temperature heating chamber through the suction pipe will contact the flying lead sulfide that has been heated, and temperature exchange will occur, enabling the lead sulfide particles that have just entered the low-temperature heating chamber to complete preheating, facilitating oxidation in the low-temperature heating chamber.

[0018] S3: The suction pipe and the intake pipe blow lead sulfide and air into the low-temperature heating chamber, and the two form a convection, causing the air to directly impact the lead sulfide discharged into the low-temperature heating chamber, further increasing the uniformity of the lead sulfide particles being heated in the low-temperature heating chamber and making them fully dispersed.

[0019] S4: When the suction pipe does not blow lead sulfide material, the ladle rod starts to ladle the fully oxidized lead oxide particles into the high-temperature reduction chamber for reduction.

[0020] Compared with the prior art, the beneficial effects of the present invention:

[0021] (1) In this application, by setting up a turning-up component, the turning-up component can push up lead sulfide particles, making them fly in the low-temperature heating chamber. This process helps improve the heating uniformity of lead sulfide particles, enabling those parts of lead sulfide particles that cannot fully contact oxygen to react with oxygen sufficiently. In this way, within the same oxidation time, more lead sulfide particles can be oxidized, effectively improving the oxidation rate. Through this method, the oxidation efficiency of lead sulfide can be effectively improved.

[0022] (2) In this application, by setting up a turning-up component, a suction pipe, and an air inlet pipe, after the turning-up component moves lead sulfide particles to the highest point on the surface of the shovel rod, they will be blown up by air through the air inlet pipe and fly in the low-temperature heating chamber. This process further improves the heating uniformity of lead sulfide particles, ensuring that each lead sulfide particle can fully contact the oxygen in the low-temperature heating chamber. In this way, lead sulfide particles can be oxidized into lead oxide particles more quickly, effectively improving the oxidation efficiency of lead sulfide.

[0023] (3) In this application, by setting up a suction pipe and an air inlet pipe on both sides of the metallurgical equipment housing, convection will occur during feeding. The air blown into the air inlet pipe will immediately disperse the lead sulfide particles blown into the low-temperature heating chamber through the suction pipe, effectively reducing the phenomenon of lead sulfide particle accumulation, and further improving the heating uniformity of lead sulfide particles, thereby achieving the purpose of improving the oxidation efficiency.

[0024] (4) In this application, by setting up an intermittent component, a material fishing rod, and a feeding component, when the intermittent component comes into effect, the material fishing rod stops working. When feeding stops, the material fishing rod starts to work and fishes the oxidized lead oxide from the low-temperature heating chamber to the high-temperature reduction chamber for treatment. This process provides sufficient time for the oxidation of lead sulfide particles in the low-temperature heating chamber, ensuring that lead sulfide particles fully contact and react with oxygen. Within the same oxidation time, each time the fished particles are lead oxide particles, effectively improving the oxidation efficiency of lead sulfide. Brief Description of the Drawings

[0025] Figure 1 is the overall front structural schematic diagram of the present invention;

[0026] Figure 2 is the overall structural sectional view of the present invention;

[0027] Figure 3 is of the present invention Figure 2 enlarged view of the structure at A in;

[0028] Figure 4 is the combined schematic diagram of the intermittent component and the material fishing rod of the present invention;

[0029] Figure 5 is the internal structural sectional view of the material fishing rod of the present invention;

[0030] Figure 6 Explosion diagram of the feeding component and the reciprocating lead screw of the present invention;

[0031] Figure 7 of the present invention Figure 2 Enlarged view of the structure at position B in

[0032] Figure 8 Cross-sectional view of the driving wheel and the first gear of the present invention during operation.

[0033] Description of the reference numerals in the figure:

[0034] 1. Metallurgical equipment housing; 2. Flipping component; 3. Intermittent component; 4. Scraping rod; 5. Material receiving pipe; 6. High-temperature reduction chamber; 7. Feeding component; 8. Swivel ring; 11. Low-temperature heating chamber; 12. Exhaust chamber; 13. Exhaust pipe; 14. Suction pipe; 15. Inlet pipe; 21. Driving motor; 22. Reciprocating lead screw; 23. Collar; 24. Shoveling rod; 31. Ring sleeve plate; 32. Ring cavity; 33. First gear; 34. Second gear; 35. Third gear; 36. Shaft rod; 37. Driving wheel; 371. Shrinkage groove; 38. Shrinkage tooth; 381. Pressure sensor; 382. Return spring; 383. Shrinkage block; 41. Connecting rod; 42. Scraping hopper; 43. Material trough; 44. Electric push rod; 45. Conductive spring; 46. Data processing unit; 47. First push plate; 48. Second push plate; 61. Reduction gas inlet pipe; 62. Discharge pipe; 71. Bellows; 72. Ring shaft; 73. Air pipe; 74. Lead screw sleeve. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1 to 8, A lead-free metallurgical device, including a metallurgical equipment housing 1. A low-temperature heating chamber 11 is provided in the metallurgical equipment housing 1. An exhaust chamber 12 is also provided in the metallurgical equipment housing 1. The exhaust chamber 12 is located at the bottom of the low-temperature heating chamber 11. A high-temperature reduction chamber 6 is rotatably provided on the outer surface of the metallurgical equipment housing 1. A material fishing rod 4 is also provided in the low-temperature heating chamber 11. The material fishing rod 4 can fish the flying materials in the low-temperature heating chamber 11 into the high-temperature reduction chamber 6. The bottom of the low-temperature heating chamber 11 is provided with mesh holes through which gas can pass, and the mesh holes are used to connect the low-temperature heating chamber 11 and the exhaust chamber 12. An exhaust pipe 13 communicating with the outside is provided in the exhaust chamber 12. A suction pipe 14 for feeding materials is provided in the low-temperature heating chamber 11. An air inlet pipe 15 for introducing air is provided in the low-temperature heating chamber 11. A turning-up assembly 2 for turning over the materials at the bottom of the low-temperature heating chamber 11 is provided in the low-temperature heating chamber 11. The turning-up assembly 2 includes a driving motor 21 fixedly installed inside the metallurgical equipment housing 1. The output end of the driving motor 21 is fixedly connected to a reciprocating lead screw 22. The reciprocating lead screw 22 is located in the low-temperature heating chamber 11. A collar 23 is fixedly sleeved on the non-threaded part at the bottom of the reciprocating lead screw 22. The outer surface of the collar 23 is fixedly connected to a shovel rod 24 for turning up the materials.

[0037] The shovel rod 24 is a push rod composed of multiple plow-shaped structures. The lowest point of the shovel rod 24 contacts the bottom of the low-temperature heating chamber 11. The diameter of the mesh holes at the bottom of the low-temperature heating chamber 11 is six millimeters. The horizontal position of the suction pipe 14 is the same as the horizontal position of the highest point of the shovel rod 24.

[0038] When metallurgizing lead sulfide, the crushed lead sulfide is pulverized into lead sulfide particles with a diameter greater than 6 mm. First, it is blown into the low-temperature heating chamber 11 through the suction pipe 14. Then, the driving motor 21 is started, and external air is blown into the low-temperature heating chamber 11 through the air inlet pipe 15. The lead sulfide particles are oxidized into lead oxide particles in the low-temperature heating chamber 11. The lead sulfide particles blown into the low-temperature heating chamber 11 through the suction pipe 14 will drive the turning-up assembly 2 to work due to the operation of the driving motor 21. The turning-up assembly 2 pushes up the lead sulfide particles. The lead sulfide particles lifted and flying by the turning-up assembly 2 are fished into the high-temperature reduction chamber 6 by the material fishing rod 4 after a sufficient time in the low-temperature heating chamber 11. The hydrogen in the high-temperature reduction chamber 6 contacts and reacts with the lead oxide particles to be reduced into lead single particles and discharged from the discharge pipe 62, realizing the metallurgy of lead sulfide, enabling the lead sulfide particles that cannot be in complete contact with oxygen to be in complete contact with oxygen, and the lead oxide particles can react with oxygen faster and be oxidized. In the same oxidation time, a larger number of lead sulfide particles are oxidized, effectively improving the oxidation rate.

[0039] When the drive motor 21 drives the tipping assembly 2 to work, first the drive motor 21 drives the reciprocating lead screw 22 to rotate. The reciprocating lead screw 22 drives the plow bar 24 to rotate through the collar 23. Due to the plow-shaped structure of the plow bar 24, the lead sulfide particles at the bottom of the low-temperature oxidation chamber will move along the surface of the plow bar 24 to the highest point of the plow bar 24, so that the accumulated lead sulfide particles are separated from each other and can be in full contact with oxygen as much as possible. The sulfur dioxide gas generated after the oxidation of lead sulfide will gradually settle downward and fall into the exhaust chamber 12 due to the greater molecular mass of its own gas molecules than that of oxygen, and is discharged through the exhaust pipe 13.

[0040] As Figure 2 shown, the air pressure in the intake pipe 15 is greater than the gravity of the raw material particles. The intake pipe 15 and the suction pipe 14 are symmetrically arranged on both sides of the metallurgical equipment housing 1;

[0041] In order to further improve the oxidation efficiency of lead sulfide and improve the uniformity of the lead sulfide particles when they are heated in the low-temperature heating chamber 11, the lead sulfide particles that move to the highest point on the surface of the plow bar 24 through the tipping assembly 2 will be blown up by the air when the intake pipe 15 passes through the air and fly in the low-temperature heating chamber 11. The uniformity of the heating of the lead sulfide particles is further improved, and each lead sulfide particle can be in full contact with the oxygen in the low-temperature heating chamber 11, so that the lead sulfide particles can be oxidized into lead oxide particles faster, further improving the oxidation efficiency of lead sulfide;

[0042] At the same time, the lead sulfide particles entering the low-temperature heating chamber 11 through the suction pipe 14 will impact the lead sulfide particles pushed up by the tipping assembly 2. During the impact, the already heated lead sulfide particles will exchange heat with the lead sulfide particles that have just entered the low-temperature heating chamber 11, realizing the preheating of the lead sulfide particles entering the low-temperature heating chamber 11 through the suction pipe 14, so that this part of the lead sulfide particles can reach the temperature of the oxidation reaction faster and improve the oxidation efficiency;

[0043] Since the intake pipe 15 and the suction pipe 14 are symmetrically arranged on both sides of the metallurgical equipment housing 1, when feeding, convection will occur between them. The air blown into the intake pipe 15 will immediately disperse the lead sulfide particles blown into the low-temperature heating chamber 11 through the suction pipe 14, reducing the generation of lead sulfide particle accumulation, further improving the uniformity of the heating of the lead sulfide particles, and thus achieving the effect of improving the oxidation efficiency.

[0044] As Figure 2 and Figure 4As shown in the figure, an intermittent component 3 is arranged in the low-temperature heating chamber 11 and is used in cooperation with the reciprocating lead screw 22. The intermittent component 3 includes an annular sleeve plate 31 fixedly sleeved on the outer surface of the reciprocating lead screw 22. An annular cavity 32 is formed in the annular sleeve plate 31. A first gear 33 rotatably sleeved on the outer surface of the reciprocating lead screw 22 is arranged in the annular cavity 32. A second gear 34 fixedly sleeved on the outer surface of the reciprocating lead screw 22 is also arranged in the annular cavity 32. A shaft rod 36 is rotatably installed at the bottom of the inner wall of the annular cavity 32. A third gear 35 is fixedly sleeved on the bottom of the outer surface of the shaft rod 36. A transmission wheel 37 is fixedly sleeved on the top of the outer surface of the shaft rod 36. And a half-circle tooth row is fixedly connected to the outer surface of the transmission wheel 37. The transmission wheel 37 is meshed with the first gear 33 through the half-circle tooth row. The second gear 34 is meshed with the third gear 35.

[0045] In order to enable the lead oxide particles flying in the low-temperature heating chamber 11 and completely oxidized at the same time to be transferred from the low-temperature heating chamber 11 to the high-temperature reduction chamber 6 without stopping the equipment, when the feed pipe 14 does not blow lead sulfide particles into the low-temperature heating chamber 11, the air inlet pipe 15 continues to blow air into the low-temperature heating chamber 11. The intermittent component 3 works, driving the material fishing rod 4 to rotate, fishing up the lead oxide flying in the low-temperature heating chamber 11 and completely reacted, and discharging it into the high-temperature reduction chamber 6 through the material receiving pipe 5 for reduction treatment. When the feed pipe 14 starts to blow lead sulfide particles into the low-temperature heating chamber 11 again, under the action of the intermittent component 3, the material fishing rod 4 stops fishing up the flying lead oxide. The design of the material fishing rod 4 and the intermittent component 3 provides sufficient oxidation time for the oxidation process of lead sulfide particles in the low-temperature heating chamber 11, enabling the lead sulfide particles to contact and react with oxygen more fully. During the same oxidation time, each time the fished particles are lead oxide particles that have been oxidized, improving the oxidation effect of lead sulfide.

[0046] When the intermittent component 3 works, first, the driving motor 21 drives the second gear 34 to rotate through the reciprocating lead screw 22. The second gear 34 drives the third gear 35 meshed with the second gear 34 to rotate. The third gear 35 drives the transmission wheel 37 to rotate through the shaft rod 36. When the part of the surface of the transmission wheel 37 with the tooth row is meshed with the first gear 33, the transmission wheel 37 drives the first gear 33 to rotate. The first gear 33 then drives the material fishing rod 4 to rotate. At this time, the material fishing rod 4 works, fishing up the flying lead oxide particles in the low-temperature heating chamber 11 into the inside of the material fishing rod 4 and sending them to the high-temperature reduction chamber 6 through the material receiving pipe 5 for reduction treatment.

[0047] Such as Figure 2 、 Figure 4 and Figure 5As shown in the figure, the outer surface of the first gear 33 is fixedly connected to the material fishing rod 4. The material fishing rod 4 is divided into two parts: a connecting rod 41 and a material fishing hopper 42. The connecting rod 41 is an L-shaped rod. A material groove 43 is provided inside the connecting rod 41. An electric push rod 44 is fixedly connected to the inner wall of the material groove 43 on the side away from the material fishing hopper 42. The telescopic end of the electric push rod 44 is fixedly connected to a first push plate 47. A conductive spring 45 is fixedly connected to the inner wall of the material groove 43 on the side close to the material fishing hopper 42. One end of the conductive spring 45 away from the material fishing hopper 42 is fixedly connected to the first push plate 47. A second push plate 48 is slidably arranged at one end of the material groove 43 close to the material fishing hopper 42. The first push plate 47 and the second push plate 48 are fixedly connected by a soft steel wire. The first push plate 47 can slide in the material groove 43. A half-circle contraction groove 371 is equidistantly arranged on the inner circumference of the transmission wheel 37. A contraction tooth 38 is arranged in each contraction groove 371. When the transmission wheel 37 rotates, the contraction tooth 38 contacts the tooth row of the first gear 33. The contraction tooth 38 is arranged on the half-circle of the outer surface of the transmission wheel 37 without a tooth row. The contraction tooth 38 includes a pressure sensor 381 fixedly installed on the inner wall of the contraction groove 371. A return spring 382 and a contraction block 383 are also arranged in the contraction groove 371. The contraction block 383 is elastically connected to the pressure sensor 381 through the return spring 382.

[0048] When the conductive spring 45 is powered off, its own elastic force is greater than the resistance of the electric push rod 44 itself. The conductive spring 45 and the electric push rod 44 are electrically connected to the data processing unit 46. The pressure sensor 381 is electrically connected to the data processing unit 46.

[0049] When the part of the transmission wheel 37 with a tooth row on its surface meshes with the first gear 33, the contraction tooth 38 does not contact the first gear 33 at this time, and there is no pressure induction on the pressure sensor 381 at this time. Then the pressure sensor 381 needs to transmit a signal to the data processing unit 46, and it can be known that the material fishing rod 4 needs to be in the material fishing state at this time. When the part of the transmission wheel 37 with the contraction tooth 38 on its surface contacts the first gear 33, due to the extrusion of the tooth row on the first gear 33, the return spring 382 will drive the contraction block 383 to contract into the contraction groove 371. At the same time, the contraction block 383 will transmit the pressure to the pressure sensor 381 through the return spring 382. The pressure sensor 381 transmits the signal to the data processing unit 46, and it can be known that the material fishing rod 4 needs to be in the material pushing state at this time. When the above two situations alternate, the data processing unit 46 can analyze that when the material fishing rod 4 is in the material pushing state, the pressure sensor 381 will transmit a signal to the data processing unit 46 every second. If the data processing unit 46 can receive signals from the pressure sensor 381 with an adjacent time interval of one second within two seconds, the data processing unit 46 can control the operation of the material fishing rod 4 at this time. If the pressure sensor 381 fails to receive signals from the pressure sensor 381 with an adjacent time interval of one second within two seconds, the material fishing rod 4 will be immediately controlled to stop the material pushing state;

[0050] When the pressure sensor 381 senses a change in pressure, the data processing unit 46 controls the electric push rod 44 in the material tank 43 to stop working. At this time, the conductive spring 45 stops power supply, starts to rebound and elongate. Since the self-elastic force of the conductive spring 45 is greater than the self-resistance of the electric push rod 44 when powered off, the conductive spring 45 after power-off will push the first push plate 47 towards the direction of the electric push rod 44. Until the lead oxide particles can enter the receiving pipe 5 through the material tank 43, at this time the soft steel wire is straightened, and the first push plate 47 drives the second push plate 48 to move through the soft steel wire. When the second push plate 48 moves to the receiving pipe 5, the conductive spring 45 stops the rebound action. During this process, the second push plate 48 pushes the lead oxide particles entering the material tank 43 to the receiving pipe 5, and the lead oxide particles will fall into the receiving pipe 5 due to their own gravity and enter the high-temperature reduction chamber 6 through the receiving pipe 5, realizing the material scooping action of the material scooping rod 4;

[0051] If the pressure sensor 381 fails to receive signals with a time interval of one second between two adjacent transmissions from the pressure sensor 381 within two seconds, at this time the pressure sensor 381 will transmit the data to the data processing unit 46, and the data processing unit 46 makes the material scooping rod 4 stop the material pushing state and controls the electric push rod 44 to work and elongate. At the same time, the conductive spring 45 starts to contract due to work, and cooperates with the electric push rod 44 to make the first push plate 47 move towards the material scooping hopper 42 together. The first push plate 47 will contact the second push plate 48 and move together with the second push plate 48 until the first push plate 47 pushes the second push plate 48 to the rightmost end as shown in the material tank 43 Figure 5 for the action of the material scooping rod 4 in the material pushing state;

[0052] During the operation of the material scooping rod 4 above, when the first push plate 47 gradually moves away from the second push plate 48, at this time the lead oxide material can continuously enter the material tank 43 through the material scooping hopper 42. During the process of the first push plate 47 driving the second push plate 48 to move through the soft steel wire, the second push plate 48 pushes the lead oxide material in the material tank 43 into the receiving pipe 5, realizing the automatic material discharging action of the material scooping rod 4. During the process of the material scooping rod 4 in the material pushing state, the first push plate 47 will push the second push plate 48 to move together, and push the material remaining on the side of the material tank 43 close to the material scooping hopper 42 after the second push plate 48 moves out of the material tank 43, preventing the material from continuously accumulating in the material tank 43 and blocking the material tank 43, affecting the normal material scooping state of the material scooping rod 4.

[0053] It should be particularly noted that multiple groups are arranged around the circumference of the material scooping rod 4. The data processing unit 46 uses an STC89C52 single-chip microcomputer, which can process data and control the operation of the electric push rod 44 and the conductive spring 45. A hole for the conductive spring 45 to move is provided in the center of the second push plate 48.

[0054] AsFigure 2 and Figure 7 As shown in Figure 7 , a material receiving pipe 5 is fixedly inserted in the material tank 43. When the conductive spring 45 is not powered on, the first push plate 47 can connect the material tank 43 with the high-temperature reduction chamber 6. The material receiving pipe 5 is a bent pipe. An inner wall of the metallurgical equipment housing 1 is provided with a rotatable rotating ring 8. The material receiving pipe 5 passes through the rotating ring 8 and is connected with the high-temperature reduction chamber 6.

[0055] A reduction gas inlet pipe 61 is fixedly inserted at the upper end of the high-temperature reduction chamber 6, and a discharge pipe 62 is fixedly inserted at the lower end of the high-temperature reduction chamber 6. Hydrogen can be introduced into the high-temperature reduction chamber 6 from the outside through the reduction gas inlet pipe 61. The hydrogen concentration in the high-temperature reduction chamber 6 is greater than the gas concentration in the low-temperature heating chamber 11. A one-way valve is arranged inside the material receiving pipe 5, and the direction of the one-way valve inside the material receiving pipe 5 allows materials to enter the high-temperature reduction chamber 6 from the material tank 43.

[0056] When the material fishing rod 4 rotates, in order to avoid breakage of the material receiving pipe 5, at this time, the rotating ring 8 will be driven to rotate through the material receiving pipe 5, and then the high-temperature reduction chamber 6 will be continuously driven to rotate through the material receiving pipe 5. Since the hydrogen concentration in the high-temperature reduction chamber 6 is greater than the gas concentration in the low-temperature heating chamber 11, it can prevent oxygen in the low-temperature heating chamber 11 from entering the high-temperature reduction chamber 6 through the material receiving pipe 5, and prevent the occurrence of hydrogen-oxygen explosion in the high-temperature reduction chamber 6. Also, due to the design of the one-way valve arranged inside the material receiving pipe 5, the hydrogen in the high-temperature reduction chamber 6 will not flow back into the low-temperature heating chamber 11, ensuring the safety of both the high-temperature reduction chamber 6 and the low-temperature heating chamber 11.

[0057] As Figure 2 、 Figure 3 and Figure 6 shown, a feeding assembly 7 is arranged inside the high-temperature reduction chamber 6 and is used in cooperation with the material suction pipe 14. The feeding assembly 7 includes a corrugated pipe 71 movably sleeved on the outer surface of the reciprocating lead screw 22. A ring shaft 72 is rotatably sleeved on the non-threaded part at the top of the reciprocating lead screw 22. A lead screw sleeve 74 is sleeved on the reciprocating lead screw 22. The top end of the corrugated pipe 71 is fixedly connected with the ring shaft 72, and the bottom end of the corrugated pipe 71 is fixedly connected with the lead screw sleeve 74. The ring shaft 72 is provided with a hole for air intake, and a one-way valve for introducing air into the inside of the ring shaft 72 is arranged in the hole. The ring shaft 72 is internally connected with the corrugated pipe 71. An air pipe 73 is also inserted on the ring shaft 72. The bottom end of the air pipe 73 is inserted on the material suction pipe 14. A one-way valve is arranged inside the material suction pipe 14, and the one-way valve inside the material suction pipe 14 allows the material suction pipe 14 to feed materials from the outside of the low-temperature heating chamber 11 into the low-temperature heating chamber 11.

[0058] When the part of the surface of the driving wheel 37 without tooth rows contacts the first gear 33, the material fishing rod 4 is in the material pushing state at this time. The driving motor 21 drives the lead screw sleeve 74 to move upward through the reciprocating lead screw. When the lead screw sleeve 74 moves upward, it will squeeze the bellows 71 and cause the bellows 71 to contract. The gas inside the bellows 71 enters the suction pipe 14 through the air pipe 73. Due to the design of the check valve inside the suction pipe 14, the gas cannot leave the low-temperature heating chamber 11 through the suction pipe 14 at this time and will enter the low-temperature heating chamber 11 again through the suction pipe 14. When the gas enters the suction pipe 14, since the flow rate in the suction pipe 14 is large and the kinetic energy of the gas flowing through the part increases when the flow rate of the negative pressure increases, according to Bernoulli's law, the kinetic energy of the fluid increases and the static pressure will decrease, which will lead to the formation of a local negative pressure area. The external gas will flow into the suction pipe 14 and suck the lead sulfide material outside the suction pipe 14 into the low-temperature heating chamber 11 with the material;

[0059] When the tooth row part of the surface of the driving wheel 37 meshes with the first gear 33, the material fishing rod 4 is in the material fishing state at this time. The driving motor 21 drives the lead screw sleeve 74 to move downward through the reciprocating lead screw. The lead screw sleeve 74 will cause the bellows 71 to extend. At the same time, the bellows 71 sucks the gas in the low-temperature heating chamber 11 into the bellows 71 through the check valve at the ring shaft 72, so as to achieve the effect of supplementing the gas inside the bellows 71, and it can be realized that no material is fed during the material fishing action, reducing the situation that the lead sulfide particles are not completely oxidized and are discharged to the high-temperature reduction chamber 6 by the material fishing rod 4.

[0060] A metallurgical method of a lead-free lead metallurgical device,

[0061] S1: The crushed lead sulfide and air are blown into the low-temperature heating chamber 11 with an internal temperature of 400 - 750 °C through the suction pipe 14 and the air inlet pipe 15. The driving motor 21 works to drive the shovel rod 24 to work, turning up the lead sulfide material accumulated at the bottom of the low-temperature heating chamber 11, and the lead sulfide material is separated from each other and scattered throughout the low-temperature heating chamber 11;

[0062] S2: The lead sulfide particles turned up by the shovel rod 24 fly at the highest point of the shovel rod 24. With the operation of the suction pipe 14 and the air inlet pipe 15, the subsequent air entering the low-temperature heating chamber 11 will impact the flying lead sulfide, improving the uniformity of the lead sulfide being heated when it is turned up by the shovel rod 24. The lead sulfide material entering the low-temperature heating chamber 11 through the suction pipe 14 will contact the flying lead sulfide that has been heated and perform heat exchange, enabling the lead sulfide particles that have just entered the low-temperature heating chamber 11 to complete preheating, which is convenient for oxidation in the low-temperature heating chamber 11;

[0063] S3: The suction pipe 14 and the intake pipe 15 blow lead sulfide and air into the low-temperature heating chamber 11, and the two form a convection, so that the air directly impacts the lead sulfide discharged into the low-temperature heating chamber 11, further increasing the uniformity of the lead sulfide particles in the low-temperature heating chamber 11 during heating and making them fully dispersed;

[0064] S4: When the lead sulfide particles flying in the low-temperature heating chamber 11 are not blown into the lead sulfide material by the suction pipe 14, the material fishing rod 4 starts to fish the fully oxidized lead oxide particles into the high-temperature reduction chamber 6 for reduction.

[0065] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A carbide-free lead metallurgical device, comprising a metallurgical equipment shell (1), wherein a low-temperature heating chamber (11) is provided in the metallurgical equipment shell (1), wherein an exhaust chamber (12) is further provided in the metallurgical equipment shell (1), wherein the exhaust chamber (12) is located at the bottom of the low-temperature heating chamber (11), wherein a high-temperature reduction chamber (6) is rotatably provided on the outer surface of the metallurgical equipment shell (1), wherein a scooping rod (4) is further provided in the low-temperature heating chamber (11), wherein the scooping rod (4) can scoop flying materials in the low-temperature heating chamber (11) into the high-temperature reduction chamber (6), wherein the device is characterized in that: The bottom of the low-temperature heating chamber (11) is provided with mesh holes through which gas can pass, the mesh holes are used to connect the low-temperature heating chamber (11) and the exhaust chamber (12), the exhaust chamber (12) is provided with an exhaust pipe (13) connected to the outside, the low-temperature heating chamber (11) is provided with a suction pipe (14) for feeding materials, the low-temperature heating chamber (11) is provided with an air intake pipe (15) for taking in air, and the low-temperature heating chamber (11) is provided with a turning component (2) for turning over the materials at the bottom of the low-temperature heating chamber (11). The lifting assembly (2) comprises a drive motor (21) fixedly mounted inside a metallurgical equipment housing (1); the output end of the drive motor (21) is fixedly connected to a reciprocating screw (22); the reciprocating screw (22) is located in a low-temperature heating chamber (11); a collar (23) is fixedly sleeved at a non-threaded portion of the bottom of the reciprocating screw (22); the outer surface of the collar (23) is fixedly connected to a shovel rod (24) for lifting the material.

2. A carbide-free lead metallurgical device according to claim 1, characterized in that: The low-temperature heating chamber (11) is provided with an intermittent assembly (3) for use with a reciprocating screw (22), the intermittent assembly (3) comprising a ring plate (31) fixedly sleeved on the outer surface of the reciprocating screw (22), the ring plate (31) having an annular cavity (32) formed therein, the annular cavity (32) having a first gear (33) rotatably sleeved on the outer surface of the reciprocating screw (22), the annular cavity (32) also having a first gear (33) fixedly sleeved on the outer surface of the reciprocating screw (22), The second gear (34) is rotatably mounted on the bottom of the inner wall of the annular cavity (32); a shaft (36) is rotatably mounted on the bottom of the inner wall of the annular cavity (32); a third gear (35) is provided on the bottom fixed sleeve of the outer surface of the shaft (36); a transmission wheel (37) is provided on the top fixed sleeve of the outer surface of the shaft (36); and the outer surface of the transmission wheel (37) is fixedly connected to a half-circle tooth row; the transmission wheel (37) meshes with the first gear (33) via the half-circle tooth row; and the second gear (34) and the third gear (35) mesh with each other.

3. A carbide-free lead metallurgical device according to claim 2, characterized in that: The outer surface of the first gear (33) is fixedly connected to a scooping rod (4), the scooping rod (4) being divided into two parts, a connecting rod (41) and a scooping hopper (42), the connecting rod (41) being an L-shaped rod, the connecting rod (41) being provided with a trough (43) inside, the inner wall of the trough (43) being away from the scooping hopper (42) being fixedly connected to an electric push rod (44), the telescopic end of the electric push rod (44) being fixedly connected to a first push plate (47), the inner wall of the trough (43) being close to the scooping hopper (42) being fixedly connected to a conductive spring (45), the end of the conductive spring (45) being away from the scooping hopper (42) being fixedly connected to a first push plate (47), and the inner wall of the trough (43) being close to the scooping hopper (42) being fixedly connected to a first A push plate (47), a second push plate (48) is slidably provided at one end of the material trough (43) close to the scoop hopper (42), the first push plate (47) and the second push plate (48) are fixedly connected by a soft steel wire, the first push plate (47) can slide in the material trough (43), the inner circumference of the transmission wheel (37) is equidistantly provided with half-circle contraction grooves (371), each of the contraction grooves (371) is provided with a contraction tooth (38), when the transmission wheel (37) rotates, the contraction tooth (38) contacts the tooth row of the first gear (33), the contraction tooth (38) is provided on the half-circle of the outer surface of the transmission wheel (37) without a tooth row, The contraction tooth (38) comprises a pressure sensor (381) fixedly mounted on the inner wall of the contraction groove (371); a return spring (382) and a contraction block (383) are also provided in the contraction groove (371); and the contraction block (383) is elastically connected to the pressure sensor (381) via the return spring (382).

4. A carbide-free lead metallurgical device according to claim 3, characterized in that: A material receiving pipe (5) is fixedly inserted in the material trough (43); when the conductive spring (45) is not energized, the first push plate (47) can connect the material trough (43) with the high-temperature reduction chamber (6); the material receiving pipe (5) is a curved pipe; a rotatable ring (8) is provided on the inner wall of the metallurgical equipment housing (1); the material receiving pipe (5) passes through the swivel (8) and is connected with the high-temperature reduction chamber (6).

5. A carbide-free lead metallurgical device according to claim 4, characterized in that: A reducing gas feed pipe (61) is fixedly inserted at the upper end of the high-temperature reduction chamber (6), and a discharge pipe (62) is fixedly inserted at the lower end of the high-temperature reduction chamber (6). The reducing gas feed pipe (61) can introduce hydrogen into the high-temperature reduction chamber (6) from the outside. The hydrogen concentration in the high-temperature reduction chamber (6) is greater than the gas concentration in the low-temperature heating chamber (11). A one-way valve is provided inside the material receiving pipe (5), and the direction of the one-way valve inside the material receiving pipe (5) allows materials to enter the high-temperature reduction chamber (6) from the material trough (43).

6. A carbide-free lead metallurgical device according to claim 5, characterized in that: A feed assembly (7) for use with a suction pipe (14) is arranged inside the high-temperature reduction chamber (6), and the feed assembly (7) comprises a bellows (71) movably sleeved on the outer surface of a reciprocating screw (22), a ring shaft (72) rotatably sleeved on the non-threaded portion of the top of the reciprocating screw (22), a screw sleeve (74) sleeved on the reciprocating screw (22), the top end of the bellows (71) is fixedly connected to the ring shaft (72), the bottom end of the bellows (71) is fixedly connected to the screw sleeve (74), and the ring shaft (72) is rotatably sleeved on the top of the reciprocating screw (22). A through hole for air intake is provided on the shaft (72), and a one-way valve for air intake into the annular shaft (72) is provided in the through hole. The annular shaft (72) is communicated with the interior of the bellows (71). An air pipe (73) is also inserted into the annular shaft (72), and the bottom end of the air pipe (73) is inserted into the suction pipe (14). A one-way valve is provided inside the suction pipe (14). The one-way valve inside the suction pipe (14) allows the suction pipe (14) to feed material from the outside of the low-temperature heating chamber (11) to the inside of the low-temperature heating chamber (11).

7. A carbide-free lead metallurgical device according to claim 6, characterized in that: The shovel rod (24) is a push rod composed of multiple plow-shaped structures. The lowest point of the shovel rod (24) contacts the bottom of the low-temperature heating chamber (11). The mesh diameter of the bottom of the low-temperature heating chamber (11) is six millimeters. The horizontal position of the suction pipe (14) is the same as the horizontal position of the highest point of the shovel rod (24).

8. A carbide-free lead metallurgical device according to claim 7, characterized in that: The air pressure of the air intake pipe (15) is greater than the gravity of the raw material particles, and the air intake pipe (15) and the material suction pipe (14) are symmetrically arranged on both sides of the metallurgical equipment housing (1).

9. A carbide-free lead metallurgical device according to claim 8, characterized in that: When the power is off, the elastic force of the conductive spring (45) is greater than the resistance of the electric push rod (44), the conductive spring (45) and the electric push rod (44) are electrically connected to the data processing unit (46), and the pressure sensor (381) is electrically connected to the data processing unit (46).

10. A metallurgical method applicable to a carbide-free lead metallurgical device according to any one of claims 1 to 9, characterized in that: S1: crushed lead sulfide and air are blown into a low-temperature heating chamber (11) with an internal temperature of 400-750°C through a suction pipe (14) and an air inlet pipe (15), and a driving motor (21) drives a shovel rod (24) to work, so that lead sulfide materials accumulated at the bottom of the low-temperature heating chamber (11) are turned up, and the lead sulfide materials are separated from each other and scattered throughout the low-temperature heating chamber (11); S2: The lead sulfide particles turned up by the shovel rod (24) fly at the highest point of the shovel rod (24). As the suction pipe (14) and the air inlet pipe (15) work, the air subsequently entering the low-temperature heating chamber (11) will impact the flying lead sulfide, so that the lead sulfide turned up by the shovel rod (24) is heated more evenly. The lead sulfide material entering the low-temperature heating chamber (11) through the suction pipe (14) will contact the heated flying lead sulfide to exchange temperature, so that the lead sulfide particles just entering the low-temperature heating chamber (11) are preheated, which is convenient for oxidation in the low-temperature heating chamber (11); S3: The suction pipe (14) and the air inlet pipe (15) blow the lead sulfide and air into the low-temperature heating chamber (11), and the two form convection, so that the air directly impacts the lead sulfide discharged into the low-temperature heating chamber (11), further increasing the uniformity of the lead sulfide particles in the low-temperature heating chamber (11) when being heated, so that the lead sulfide particles are completely dispersed; S4: When the lead sulfide particles flying in the low-temperature heating chamber (11) are not pumped into the lead sulfide material by the suction pipe (14), the scooping rod (4) starts to scoop the completely oxidized lead oxide particles into the high-temperature reduction chamber (6) for reduction.

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