Energy-saving type crude lead continuous refining furnace and refining method

Abstract

The invention relates to the technical field of crude lead refining, in particular to an energy-saving crude lead continuous refining furnace and a refining method.The energy-saving crude lead continuous refining furnace comprises a mixing mechanism used for conducting high-temperature stirring on molten lead so as to promote reaction of internal impurities; the mixing mechanism comprises a reaction tank, a stirring assembly arranged in the middle of the reaction tank and an adding assembly arranged on the periphery of the reaction tank; the reaction mechanism is arranged at the bottom of the reaction tank and is used for promoting full contact of oxygen and impurities and improving the impurity removal effect; the filtering mechanism is arranged on the reaction mechanism and is used for filtering solid impurities generated after the reaction; the feeding mechanisms are arranged at the upper end and the lower end of the reaction tank and used for controlling input of lead powder and output of lead liquid. The technical problems of poor tin impurity removal effect and low efficiency are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of crude lead refining, and in particular to an energy-saving crude lead continuous refining furnace and a refining method. Background Art

[0002] During the lead smelting process, tin primarily exits the system as various tin-containing slags (such as smelting slag and refining slag); while a portion accumulates in the anode slime of the lead-copper electrolysis system, ultimately exiting the system as tin-containing slag during the rare earth metal separation process. Tin removal from crude lead primarily involves oxidation refining and alkaline refining. Oxidative refining exploits the principle that impurities have a greater affinity for lead than lead. The order of metal oxidation difficulty is roughly: Ag, Cu, Bi, Pb, Sb, As, Fe, Zn, etc. Therefore, theoretically, all metallic impurities after lead can be removed using oxidation. Oxidative slagging is the primary process for tin separation and recovery, often combined with alkaline smelting to a certain extent. Oxidative slagging is divided into direct oxidation (e.g., direct oxygen oxidation to produce alkaline slag) and oxidant oxidation (e.g., strong oxidant oxidation to produce alkaline slag, lead oxide oxidation to produce alkaline slag).

[0003] Patent document CN114686925A discloses a crude lead refining device and method. The crude lead refining device comprises a refining furnace having a furnace chamber horizontally divided into a first refining zone and a second refining zone, the bottoms of which are connected. The first refining zone is used to refine and remove copper from crude lead to produce lead matte and decoppered crude lead. A first heating unit is provided above the first refining zone. A cooling unit is provided outside the first refining zone, and the first refining zone also has an external circulation flow path. The cooling unit is provided on the external circulation flow path. The second refining zone is used to oxidize the decoppered crude lead to remove arsenic, antimony, and tin to form softened lead. The second refining zone is provided with an oxygen supply unit and a second heating unit.

[0004] However, in actual use, there are problems with the removal of tin impurities in crude lead, such as insufficient removal of impurities and low efficiency. Summary of the Invention The purpose of the present invention is to address the shortcomings of the prior art. By providing a reaction mechanism and a filtering mechanism, bubbles are introduced into the bottom of the lead liquid and a large number of small bubbles float up, so that impurities in the lead liquid are fully contacted with oxygen. At the same time, industrial salt is evenly mixed into the lead liquid by using a mixing mechanism, thereby improving the reaction effect of tin impurities and reducing lead waste. Finally, sufficient filtration is performed through a filter screen, thereby solving the technical problems of poor tin impurity removal effect and low efficiency.

[0005] In response to the above technical problems, the technical solutions adopted are as follows: An energy-saving crude lead continuous refining furnace, comprising: A mixing mechanism, which is used to stir the lead liquid at high temperature to promote the reaction of internal impurities, and includes a reaction tank, a stirring component arranged in the middle of the reaction tank, and an adding component arranged on the periphery of the reaction tank; A reaction mechanism is provided at the bottom of the reaction tank and is used to promote full contact between oxygen and impurities, thereby improving the impurity removal effect; A filtering mechanism, which is arranged on the reaction mechanism and is used to filter solid impurities generated after the reaction; The feeding mechanism is arranged at the upper and lower ends of the reaction tank and is used to control the input of lead powder and the output of lead liquid.

[0006] Preferably, the reaction tank is configured as an inner and outer double layer, the inner layer is configured as a heating tank for heating lead powder, and the outer layer is configured as a heat preservation tank, wherein an electromagnetic heater is provided on the outer surface of the heating tank.

[0007] Preferably, the stirring assembly is arranged in the middle of the heating tank, including a rotating shaft driven by a motor and rotatably connected to the top of the heating tank, fixed rods evenly distributed on the outside of the rotating shaft, a first connecting rod hinged under the fixed rod and driven to rotate by a motor, a stirring blade connected to the lower end of the first connecting rod, and a winch arranged on the fixed rod and with steel cables respectively connected to the first connecting rod and the stirring blade.

[0008] Preferably, the adding components include multiple groups of arc tubes arranged between the heating tank and the insulation tank and connected to the interior of the heating tank at the upper and lower ends, a grid plate arranged at the upper entrance of the arc tube, an electric pump arranged at the bottom of the arc tube and a discharge unit arranged above the arc tube.

[0009] Preferably, the discharge unit includes a plurality of groups of silos which are respectively arranged above each arc tube and are internally divided into a plurality of small spaces, a discharge plate which is rotatably connected to the bottom of the silo and has a discharge port on its surface, a fan blade fixed to the bottom of the discharge plate and extending into the arc tube, an annular slide rail arranged at the upper end of all silos, a rotating frame which is driven by a motor to move along the annular slide rail, a plurality of transfer silos which rotate on the rotating frame and have a circle of gear teeth on its surface, a rack which is arranged on the inner wall of the insulation tank and meshes with the transfer silo, and a mixing pipe which is arranged at the top of the insulation tank.

[0010] Preferably, the reaction mechanism includes a sliding rod provided in the middle of the heating tank and having hollow ends, air holes provided in the hollow portions at both ends of the sliding rod, and baffles provided in the air holes for controlling the opening and closing of the air holes, a gas storage bottle provided at the upper end of the sliding rod, an air guide tube provided at the lower end of the sliding rod and connected to the sliding rod, a plurality of air valves provided on the air guide tube, and an air cavity slidably connected to the sliding rod; The air cavity is hollow and contains a piston driven by an electric cylinder. A ventilation port is provided at a position of the air cavity close to the slide rod.

[0011] Preferably, the filtering mechanism includes a main shaft arranged at the bottom of the air cavity and slidably connected to the sliding rod, a telescopic cylinder arranged at the bottom of the air cavity and used to drive the main shaft to slide, an umbrella rib structure arranged on the main shaft, and a pneumatic suction cup hinged to the top of the heating tank through motor control; The umbrella rib structure includes multiple groups of connecting rods, a control ring slidably connected to the main shaft and used to drive the umbrella ribs to open and close, and a filter net arranged on the surface of the umbrella ribs to serve as an "umbrella cover".

[0012] Preferably, the feeding mechanism includes a discharge assembly arranged at the top of the heating tank and a discharge assembly arranged at the bottom of the heating tank, the discharge assembly includes a lead powder bin arranged at the top of the heating tank and having a circle of discharge ports opened on the periphery, a feed pipe arranged at the top of the lead powder bin, and a rotating scraper rotatably connected to the inside of the lead powder bin and driven by a motor.

[0013] Preferably, the discharge assembly includes a plurality of output ports arranged at the bottom of the heating tank and the insulation tank, a sealing plug that slides vertically in each output port and is controlled to rise and fall by an electric cylinder, and an output pipe that connects each output port and has an insulation layer on the outer surface.

[0014] As a further preferred embodiment, the crude lead refining method is applied to the energy-saving crude lead continuous refining furnace according to any one of claims 1 to 5, comprising the following steps: Step 1: Heating and stirring. Lead powder is fed into the heating tank through the discharge assembly, heated to a molten state by an electromagnetic heater, and stirred by a stirring blade. At this time, the discharge unit continuously feeds industrial salt into the arc tube. The rotation of the arc tube and the molten lead liquid allows the industrial salt to be quickly and evenly mixed into the lead liquid. Step 2, the reaction step, the air cavity moves along the slide rod to the bottom, at which point the air exchange port of the air cavity is connected to the air duct. The piston moves to squeeze air into the air duct and releases it evenly into the lead liquid through the air duct. The bubbles float in the lead liquid and fully react with the tin impurity in the lead liquid to form a solid reactant that floats in the lead liquid. Step 3: Filtration. The air cavity moves upward, and the stirring blade stops stirring. The winch and motor fold the stirring blade and the first connecting rod. At the same time, the umbrella structure at the bottom of the air cavity opens, and the filter is unfolded. As the air cavity moves upward, the filter filters the solid reactants in the lead liquid. After the air cavity moves to the top, the pneumatic suction cup rotates, sucking in the solid impurities on the filter and outputting them through the pipeline. The umbrella is restored, and the air cavity is connected to the air hole at the top of the slide rod. The piston returns to its position, and new air is drawn in, waiting for another refining process. Step 4, the material loading and unloading step, while the air cavity moves upward, the sealing plug at the bottom is opened, the lead liquid output device, and then the feed pipe inputs lead powder into the lead powder bin. After the rotating scraper rotates, the lead powder is spread along a ring into the heating tank for subsequent heating and refining.

[0015] Beneficial effects of the present invention: (1) The present invention provides a mixing mechanism and utilizes the centrifugal force generated by the stirring blade to make the lead liquid on the outside of the foreign language heating tank flow into the arc tube, and evenly adds industrial salt to the arc tube. By utilizing the inertia of the lead liquid flow and cooperating with an electric pump, the lead liquid added with industrial salt flows out from the bottom of the heating tank, forming a flow circulation of the lead liquid from top to bottom, which enables the industrial salt to quickly diffuse into the entire heating tank, reduces the oxidation of lead, and improves the purity of tin impurities; (2) The present invention provides a reaction mechanism, which introduces gas into the bottom of the heating tank and releases the gas in the form of small bubbles, thereby greatly increasing the contact area between oxygen and lead liquid, and promoting more oxygen to react with tin in the lead liquid, thereby improving the removal effect and efficiency of tin impurities; (3) In the present invention, a filtering mechanism is provided to cooperate with the reaction mechanism. When the mixing mechanism and the reaction mechanism are working normally, the filtering mechanism maintains a convergent state to avoid interference. When the reaction mechanism finishes working, the filtering mechanism quickly unfolds to form a filter net with an arc, which can filter out all solid impurities in the lead liquid, reduce omissions, and facilitate the collection and output of filtered impurities. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of an energy-saving crude lead continuous refining furnace.

[0017] Figure 2 This is a schematic diagram of the internal structure of an energy-saving crude lead continuous refining furnace.

[0018] Figure 3 Schematic diagram of the structure of the stirring component.

[0019] Figure 4 Schematic diagram of the working status of the stirring component.

[0020] Figure 5 A schematic diagram of the structure for adding components.

[0021] Figure 6 It is a partial structural diagram of the discharge unit.

[0022] Figure 7 It is a cross-sectional schematic diagram of the discharge unit.

[0023] Figure 8 Schematic diagram of the reaction mechanism.

[0024] Figure 9 Schematic diagram of the internal structure of the air cavity.

[0025] Figure 10 It is a structural diagram of the filtering mechanism.

[0026] Figure 11 Schematic diagram of the working status of the filtering mechanism.

[0027] Figure 12 It is a structural diagram of the feeding mechanism.

[0028] Figure 13 The figure is a process flow diagram of a crude lead refining method. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1 like Figure 1 、 Figure 2 As shown, an energy-saving crude lead continuous refining furnace comprises: A mixing mechanism 1 is used to stir the lead liquid at high temperature to promote the reaction of internal impurities. The mixing mechanism 1 includes a reaction tank 11, a stirring component 12 disposed in the middle of the reaction tank 11, and an adding component 13 disposed on the periphery of the reaction tank 11; The reaction mechanism 2 is arranged at the bottom of the reaction tank 11 and is used to promote full contact between oxygen and impurities, thereby improving the impurity removal effect; A filtering mechanism 3, which is provided on the reaction mechanism 2 and is used to filter solid impurities generated after the reaction; The feeding mechanism 4 is provided at the upper and lower ends of the reaction tank 11 and is used to control the input of lead powder and the output of lead liquid.

[0031] In this embodiment, the reaction mechanism 2 and the filtering mechanism 3 are provided to achieve sufficient reaction and filtration of the impurity tin in the lead powder, thereby improving the removal effect of the impurities.

[0032] In detail, the industrial salt is evenly mixed in the lead liquid through the mixing mechanism 1, and then the reaction mechanism 2 is used to achieve full contact between the air and the impurities, so that the oxygen in the air can fully react with the impurity tin in the lead liquid to form solid impurities, and then the filtering mechanism 3 is used to filter and complete the removal of the impurity tin.

[0033] It should be noted that under oxidant conditions, metallic tin will react to form tin dioxide and slag enrichment with alkali. Given that the metallic tin content in copper slag is relatively low, if ventilation and oxygen enrichment are used for oxidation, there is a risk of excessive oxidation of metallic lead and entry into the tin-rich slag. Therefore, mechanical stirring can be used to form a vortex in the melt for disturbance. The disturbance caused by mechanical stirring continuously draws oxygen from the air into the melt, resulting in a concentration of oxygen in the agitator's disturbed areas. Compared to oxygen enrichment, the amount of oxygen in the drawn-in air is lower, and metallic tin's ability to bind oxygen is greater than that of metallic lead. Therefore, metallic tin is preferentially oxidized, causing a small amount of lead to be oxidized in the melt. Since tin is more reactive than lead, this leads to lead replacement in the melt. To prevent excessive tin from being encapsulated by lead oxide during the oxidation slagging process, industrial alkali or industrial salt is used to regulate the slag. Through this oxidation (alkaline) slag formation, mechanical stirring ultimately results in metallic tin concentrating on the melt surface in the form of spherical slag. The slag is coated with white tin dioxide, while a small amount of yellow lead oxide adheres to the exterior due to the inevitable oxidation of metallic lead. Tin-rich slag (30% Sn) obtained through oxidation slagging has market value and can be sold directly or further refined.

[0034] It is worth mentioning that the provision of the mixing mechanism 1 facilitates the control of the overall temperature of the device and is also beneficial for preheating the lead powder and air in advance, thus saving energy consumption.

[0035] Further, if Figure 2 As shown, the reaction tank 11 is configured as a double layer, the inner layer is configured as a heating tank 111 for heating lead powder, and the outer layer is configured as a heat preservation tank 112, wherein the outer surface of the heating tank 111 is provided with an electromagnetic heater.

[0036] In this embodiment, by setting up a double-layer heating tank 111 and an insulation tank 112, the setting of the insulation tank 112 is utilized to facilitate the control of the temperature inside the device, making the temperature inside the heating tank 111 more concentrated and stable. On the other hand, the space between the insulation tank 112 and the heating tank 111 is utilized to arrange various components, reducing the direct impact of high temperature on these components while reducing the energy consumption of the electromagnetic heater during heating.

[0037] In detail, the lead powder is in solid powder form before being input into the refining furnace. After being input into the heating tank 111, it is heated by an electromagnetic heater and converted into a molten state for subsequent reaction and filtration.

[0038] It should be noted that both the heating tank 111 and the insulation tank 112 have a certain insulation effect, realizing double-layer insulation. The heating tank 111 itself is conducive to controlling the temperature of the lead powder during the reaction, and the insulation tank 112 reduces heat loss and reduces the energy consumption of the device.

[0039] Further, if Figure 3 、 Figure 4 As shown, the stirring assembly 12 is arranged in the middle of the heating tank 111, including a rotating shaft 121 driven by a motor and rotatably connected to the top of the heating tank 111, a fixed rod 122 evenly distributed on the outside of the rotating shaft 121, a first connecting rod 123 hinged below the fixed rod 122 and driven to rotate by a motor, a stirring blade 124 connected to the lower end of the first connecting rod 123, and a winch 125 arranged on the fixed rod 122 and with steel cables respectively connected to the first connecting rod 123 and the stirring blade 124.

[0040] In this embodiment, by providing a fixed rod 122 and a stirring blade 124, the lead liquid can be stirred and the uniform flow of industrial salt in the lead liquid can be roughly sheared. At the same time, the stirring blade 124 can be folded to free up space for the subsequent filtration step.

[0041] In detail, under normal working conditions, the first connecting rod 123 and the stirring blade 124 remain in a vertical state, and are rotated by the drive of the rotating shaft 121 to stir the lead liquid. When the stirring blade 124 needs to be folded, the motor cooperates with the winch 125, and the motor drives the first connecting rod 123 to rotate. At the same time, the winch 125 retracts the steel cable, causing the first connecting rod 123 and the stirring blade 124 to rotate upward while folding together, and finally maintain a horizontal folded state.

[0042] It should be noted that since the first connecting rod 123, the stirring blade 124, the steel cable and other structures located in the direct heating area of ​​the electromagnetic heater are all made of high-temperature resistant materials, damage due to electromagnetic heating is avoided.

[0043] It is worth mentioning that by providing the foldable stirring blades 124, the lead liquid can be effectively stirred and the subsequent filtration work can be facilitated, thereby avoiding mutual interference between the various components.

[0044] Further, if Figure 5 As shown, the adding component 13 includes a plurality of arc tubes 131 arranged between the heating tank 111 and the insulation tank 112 and connected to the interior of the heating tank 111 at the upper and lower ends, a grid plate 132 arranged at the upper entrance of the arc tube 131, an electric pump 133 arranged at the bottom of the arc tube 131 and a discharge unit 134 arranged above the arc tube 131.

[0045] In this embodiment, the arc tube 131 and the electric pump 133 are arranged to control the flow direction of the lead liquid. By coordinating with the flow direction during the stirring process of the lead liquid, communication between the upper and lower layers of the lead liquid is achieved, which facilitates the rapid diffusion of industrial salt after addition.

[0046] In detail, as the stirring blades 124 stir the lead liquid, the lead liquid rotates in the heating tank 111. At this time, the lead liquid level is high in the middle and low around the edges, forming an inverted cone. The lead liquid at the edge flows into the arc tube 131 through the grid plate 132. After industrial salt is added to the arc tube 131, it is output from the bottom of the heating tank 111 through the electric pump 133, realizing a circulation reflux, so that the industrial salt is rapidly diffused and evenly distributed throughout the heating tank 111.

[0047] It should be noted that the arc tube 131 is tilted and has a certain curvature, so that the molten lead moves under the action of inertia after entering the arc tube 131, with a certain impact force.

[0048] It is worth mentioning that a discharge unit 134 is provided in the arc tube 131 , through which industrial salt is continuously fed into the arc tube 131 , and coordinated with the flow of the lead liquid, it can be rapidly diffused into the lead liquid in the entire heating tank 111 .

[0049] Further, if Figure 6 、 Figure 7 As shown, the discharge unit 134 includes a plurality of groups of silos 1341 respectively arranged above each arc tube 131 and internally divided into a plurality of small spaces, a discharge plate 1342 rotatably connected to the bottom of the silo 1341 and having a discharge port on the surface, a fan blade 1343 fixed to the bottom of the discharge plate 1342 and extending into the arc tube 131, an annular slide rail 1344 arranged at the upper end of all silos 1341, a rotating frame 1345 driven by a motor to move along the annular slide rail 1344, a plurality of groups of transfer bins 1346 rotating on the rotating frame 1345 and having a circle of gear teeth on the surface, a rack 1347 arranged on the inner wall of the insulation tank 112 and meshing with the transfer bin 1346, and a mixing pipe 1348 arranged at the top of the insulation tank 112.

[0050] In this embodiment, by providing the silo 1341 and the transfer silo 1346 , the silo 1341 can continuously input industrial salt into the arc tube 131 , and the transfer silo 1346 can replenish the silo 1341 .

[0051] In detail, the silo 1341 is provided with a plurality of separated small spaces, in which industrial salt is placed. As the lead liquid flows into the arc tube 131, the fan blade 1343 and the discharge plate 1342 are pushed to rotate, and the discharge port on the discharge plate 1342 rotates, passing through each small space in turn. The industrial salt in each small space falls through the discharge port and enters the arc tube 131. At the same time, the motor drives the rotating frame 1345 to rotate along the annular slide rail 1344, and the transfer bin 1346 rotates with the rotating frame 1345. The mixing pipe 1348 is fixed in position and is used to transport industrial salt into the device and release the industrial salt into each transfer bin 1346. As the transfer bin 1346 moves, each time the transfer bin 1346 moves to a bin 1341, the rack 1347 drives the transfer bin 1346 to rotate along its own axis so that different positions are aligned with the bin 1341, causing the industrial salt to fall and replenish the industrial salt in the bin 1341.

[0052] It should be noted that the transfer bin 1346 is also provided with a plurality of partitions 22 to evenly divide the transfer bin 1346 into a plurality of small compartments. When the material yard is replenished, the industrial salt in a small compartment falls into the open bin 1341. As the transfer bin 1346 rotates and moves to the next partition bin 1341, the transfer bin 1346 rotates a small compartment to complete the replenishment.

[0053] It is worth mentioning that the provision of the silo 1341 and the transfer silo 1346 can control the release rate of the industrial salt, so that the industrial salt is continuously released into the arc tube 131 .

[0054] Further, if Figure 8 、 Figure 9 As shown, the reaction mechanism 2 includes a sliding rod 21 provided in the middle of the heating tank 111 and having hollow ends, air holes provided in the hollow portions at both ends of the sliding rod 21, and baffles 22 provided in the air holes for controlling the opening and closing of the air holes, a gas storage bottle 23 provided at the upper end of the sliding rod 21, an air guide tube 24 provided at the lower end of the sliding rod 21 and communicating with the sliding rod 21, a plurality of air valves 25 provided on the air guide tube 24, and an air cavity 26 slidably connected to the sliding rod 21; The air cavity 26 is hollow and contains a piston 27 driven by an electric cylinder. A ventilation port 28 is provided in the air cavity 26 close to the slide rod 21 .

[0055] In this embodiment, the air cavity 26 and the air guide tube 24 are provided to realize the movement and release of gas, so that the air can float up from the bottom of the lead liquid in the form of a large number of small bubbles. During the floating process of the bubbles, the lead liquid is fully in contact and fully reacts.

[0056] In detail, air is stored in the air cavity 26. When the air cavity 26 slides down to the bottom of the heating tank 111, the air cavity 26 is connected to the bottom of the slide rod 21, and the piston 27 squeezes the gas into the air guide tube 24, and releases it through the air valve 25 on the air guide tube 24, forming small bubbles and gradually floating up. After the bubbles are released, the air cavity 26 moves up and returns to its position. After moving to the top, the air cavity 26 is connected to the top of the slide rod 21 again to replenish air.

[0057] It should be noted that the gas cylinder 23 is arranged between the insulation tank 112 and the heating tank 111, and one end of the gas cylinder 23 is connected to the outside of the device to absorb fresh gas, and the other end is connected to the top of the sliding rod 21.

[0058] For the movement of the air cavity 26 on the slide rod 21, various driving modes such as a motor and a screw can be used; It is worth mentioning that the gas storage cylinder 23 is arranged between the insulation tank 112 and the heating tank 111, which can preheat the gas therein and prevent the gas from affecting the internal temperature after entering the heating tank 111.

[0059] Further, if Figure 10 、 Figure 11 As shown, the filtering mechanism 3 includes a main shaft 31 provided at the bottom of the air cavity 26 and slidably connected to the slide rod 21, a telescopic cylinder 32 provided at the bottom of the air cavity 26 and used to drive the main shaft 31 to slide, an umbrella rib structure 33 provided on the main shaft 31, and a pneumatic suction cup 34 hinged to the top of the heating tank 111 through motor control; The rib structure 33 includes a plurality of connecting rods 331, a control ring 332 slidably connected to the main shaft 31 and used to drive the ribs to open and close, and a filter 333 provided on the surface of the ribs to serve as an "umbrella cover".

[0060] In this embodiment, the rib structure 33 and the pneumatic suction cup 34 are provided to cooperate with the up and down movement of the air cavity 26 to achieve filtering and removal of solid impurities.

[0061] In detail, after the air cavity 26 releases all the gas, the umbrella rib structure 33 extends out of the lower part of the air cavity 26 under the action of the telescopic cylinder 32, and the umbrella rib structure 33 is opened to form an "umbrella surface" composed of a filter mesh 333. Then, as the air cavity 26 moves upward, the filter mesh 333 moves upward to filter out all the solids in the lead liquid. After the filter mesh 333 moves to the top, the pneumatic suction cup 34 rotates downward, close to the filter mesh 333, and sucks all the impurities on the filter mesh 333 and outputs them to the device.

[0062] It should be noted that the rib structure 33 adopts the skeleton structure of a three-fold umbrella commonly seen in daily life. Its specific structure can refer to the rib disclosed in publication number CN104138111B. It should be noted that in this device, the upper nest and the middle nest are fixed on the control ring 332, and the control ring 332 is driven by the telescopic cylinder 32 to slide on the main shaft 31 to realize the expansion and contraction of the umbrella ribs.

[0063] At the same time, a block is provided at the end of the telescopic rod of the telescopic cylinder 32, and buckles that can lock the block are provided at the outer ends of the main shaft 31 and the control ring 332, so that the telescopic rod can be extended. First, the main shaft 31 is driven to drive the entire umbrella rib structure 33 to extend out of the bottom of the air cavity 26. Then, the main shaft 31 is locked by the air cavity 26. The telescopic rod continues to extend and disengages from the buckle on the main shaft 31, pushing the control ring 332 to move and open the umbrella ribs. When retracting, the telescopic rod shortens, driving the control ring 332 and the main shaft 31 to return to their original position, and then locks into the buckle of the main shaft 31, ready for the next operation. It is worth mentioning that, by providing the umbrella rib structure 33 , the space occupied by the filter 333 is reduced, so that all impurities in the lead liquid can be filtered out more fully to prevent omission.

[0064] Further, if Figure 12 As shown, the feeding mechanism 4 includes a discharge component 41 arranged at the top of the heating tank 111 and a discharge component 42 arranged at the bottom of the heating tank 111, the discharge component 41 includes a lead powder bin 411 arranged at the top of the heating tank 111 and having a circle of discharge ports opened on the periphery, a feeding pipe 412 arranged at the top of the lead powder bin 411, and a rotating scraper 413 rotatably connected to the inside of the lead powder bin 411 and driven by a motor.

[0065] In this embodiment, the lead powder is released by providing the lead powder bin 411 and the rotating scraper 413 , so that the lead powder can be released to the surroundings of the heating tank 111 , thereby preventing the lead powder from a large amount of aggregation.

[0066] In detail, lead powder is input into the device through the feed pipe 412 and enters the lead powder bin 411. The rotating scraper 413 rotates under the drive of the motor. As the lead powder is continuously input, the rotating scraper 413 scrapes the lead powder from the discharge port at the edge, and the lead powder falls into the heating tank 111 for heating.

[0067] It should be noted that the size of the discharge port on the lead powder bin 411 should always be set to avoid being too small, which may cause lead powder to accumulate due to untimely discharge, and on the other hand, to prevent being too large, which may cause the lead powder to be released without rotating a circle, resulting in a large amount of lead powder accumulation in some local positions in the heating tank 111, while there is no lead powder in some positions.

[0068] Further, if Figure 12As shown, the discharge assembly 42 includes a plurality of output ports 421 arranged at the bottom of the heating tank 111 and the insulation tank 112, a sealing plug 422 that slides vertically in each output port 421 and is controlled to rise and fall by an electric cylinder, and an output pipe 423 that connects each output port 421 and has an insulation layer on the outer surface.

[0069] In this embodiment, a sealing plug 422 and an output tube 423 are provided to output the filtered lead liquid.

[0070] In detail, the sealing plug 422 is driven by an electric cylinder, and the sealing plug 422 moves upward to open the output port 421, so that the lead liquid can flow out and be collected and output from the device through the output pipe 423.

[0071] It should be noted that, regarding the release timing of the sealing plug 422, the lead liquid can be output after the umbrella ribs are unfolded.

[0072] It is worth mentioning that the provision of the insulation layer on the output pipe 423 prevents the lead liquid from solidifying or sticking due to temperature changes when flowing out of the heating tank 111.

[0073] Example 2 like Figure 13 As shown, the components identical or corresponding to those in the first embodiment are designated by the corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: Further, if Figure 13 As shown, the crude lead refining method is applied to an energy-saving crude lead continuous refining furnace, comprising the following steps: Step 1: Heating and stirring. Lead powder is fed into the heating tank 111 through the discharge assembly 41, heated to a molten state by an electromagnetic heater, and stirred by the stirring blade 124. At this time, the discharge unit 134 continuously feeds industrial salt into the arc tube 131. The rotation of the arc tube 131 and the molten lead liquid allows the industrial salt to be quickly and evenly mixed into the lead liquid. Step 2, the reaction step, the air cavity 26 moves along the slide bar 21 to the bottom. At this time, the air exchange port 28 of the air cavity 26 is connected to the air duct 24. The piston 27 moves to squeeze air into the air duct 24, and the air is evenly released into the lead liquid through the air duct 24. The bubbles float in the lead liquid and fully react with the tin impurity in the lead liquid to form a solid reactant that floats in the lead liquid. Step 3: Filtration. The air cavity 26 moves upward, and the stirring blade 124 stops stirring. The winch 125 and the motor fold the stirring blade 124 and the first connecting rod 123. At the same time, the umbrella structure 33 at the bottom of the air cavity 26 opens, and the filter 333 is unfolded. As the air cavity 26 moves upward, the filter 333 filters the solid reactants in the lead liquid. After the air cavity 26 moves to the top, the pneumatic suction cup 34 rotates, sucking in the solid impurities on the filter 333 and outputting them through the pipeline. The umbrella structure is restored, and the air cavity 26 is now connected to the air hole at the top of the slide rod 21. The piston 27 returns to its position, sucking in new air, and waiting for another refining process. Step 4 is the feeding and discharging step. As the air cavity 26 moves upward, the sealing plug 422 at the bottom is opened, the lead liquid is output, and then the feed pipe 412 inputs lead powder into the lead powder bin 411. After the rotating scraper 413 rotates, the lead powder is spread in a ring shape into the heating tank 111 for subsequent heating and refining.

[0074] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0075] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0076] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art based on the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An energy-saving crude lead continuous refining furnace, characterized in that: include: A mixing mechanism (1), the mixing mechanism (1) being used to stir the lead liquid at a high temperature so as to promote the reaction of impurities inside, the mixing mechanism (1) comprising a reaction tank (11), a stirring component (12) arranged in the middle of the reaction tank (11), and an adding component (13) arranged on the periphery of the reaction tank (11); A reaction mechanism (2), wherein the reaction mechanism (2) is arranged at the bottom of the reaction tank (11) and is used to promote sufficient contact between oxygen and impurities, thereby improving the impurity removal effect; A filtering mechanism (3), wherein the filtering mechanism (3) is arranged on the reaction mechanism (2) and is used to filter solid impurities generated after the reaction; A feeding mechanism (4) is arranged at the upper and lower ends of the reaction tank (11) and is used to control the input of lead powder and the output of lead liquid.

2. The energy-saving crude lead continuous refining furnace according to claim 1, characterized in that: The reaction tank (11) is configured as an inner and outer double layer, the inner layer being configured as a heating tank (111) for heating lead powder, and the outer layer being configured as a heat preservation tank (112), wherein an electromagnetic heater is provided on the heating tank (111).

3. The energy-saving crude lead continuous refining furnace according to claim 2, characterized in that: The stirring assembly (12) is arranged in the middle of the heating tank (111), and comprises a rotating shaft (121) driven by a motor and rotatably connected to the top of the heating tank (111), fixed rods (122) evenly distributed on the outside of the rotating shaft (121), a first connecting rod (123) hinged below the fixed rod (122) and driven to rotate by the motor, a stirring blade (124) connected to the lower end of the first connecting rod (123), and a winch (125) arranged on the fixed rod (122) and having steel cables respectively connected to the first connecting rod (123) and the stirring blade (124).

4. The energy-saving crude lead continuous refining furnace according to claim 2, characterized in that: The adding assembly (13) comprises a plurality of groups of arc tubes (131) arranged between the heating tank (111) and the heat-insulating tank (112) and connected at both ends to the interior of the heating tank (111), a grid plate (132) arranged at the entrance of the upper end of the arc tube (131), an electric pump (133) arranged at the bottom of the arc tube (131), and a discharge unit (134) arranged above the arc tube (131).

5. The energy-saving crude lead continuous refining furnace according to claim 4, characterized in that: The material discharge unit (134) comprises a plurality of groups of material bins (1341) respectively arranged above each arc tube (131) and having an interior divided into a plurality of small spaces, a material discharge plate (1342) rotatably connected to the bottom of the material bin (1341) and having a material discharge opening on its surface, a fan blade (1343) fixed to the bottom of the material discharge plate (1342) and extending into the arc tube (131), an annular slide rail (1344) arranged at the upper end of all the material bins (1341), a rotating frame (1345) driven by a motor to move along the annular slide rail (1344), a plurality of groups of transfer bins (1346) rotatably mounted on the rotating frame (1345) and having a circle of gear teeth on its surface, a rack (1347) arranged on the inner wall of the heat preservation tank (112) and meshing with the transfer bin (1346), and a mixing pipe (1348) arranged at the top of the heat preservation tank (112).

6. The energy-saving crude lead continuous refining furnace according to claim 1, characterized in that: The reaction mechanism (2) comprises a sliding rod (21) arranged in the middle of the heating tank (111) and having hollow ends, air holes provided in the hollow parts at both ends of the sliding rod (21), and baffles (22) provided in the air holes for controlling the opening and closing of the air holes, a gas storage bottle (23) arranged at the upper end of the sliding rod (21), an air guide pipe (24) arranged at the lower end of the sliding rod (21) and connected to the sliding rod (21), a plurality of air valves (25) provided on the air guide pipe (24), and an air cavity (26) slidably connected to the sliding rod (21); The air cavity (26) is hollow inside and contains a piston (27) driven by an electric cylinder. A ventilation port (28) is provided at a position of the air cavity (26) close to the slide rod (21).

7. The energy-saving crude lead continuous refining furnace according to claim 6, characterized in that: The filtering mechanism (3) comprises a main shaft (31) arranged at the bottom of the air cavity (26) and slidably connected to the sliding rod (21), a telescopic cylinder (32) arranged at the bottom of the air cavity (26) and used to drive the main shaft (31) to slide, an umbrella rib structure (33) arranged on the main shaft (31), and a pneumatic suction cup (34) hinged to the top of the heating tank (111) through motor control; The umbrella rib structure (33) comprises a plurality of connecting rods (331), a control ring (332) slidably connected to the main shaft (31) and used to drive the umbrella ribs to be opened and closed, and a filter net (333) arranged on the surface of the umbrella ribs and serving as an "umbrella cover".

8. The energy-saving crude lead continuous refining furnace according to claim 1, characterized in that: The feeding mechanism (4) comprises a discharge assembly (41) arranged at the top of the heating tank (111) and a discharge assembly (42) arranged at the bottom of the heating tank (111); the discharge assembly (41) comprises a lead powder bin (411) arranged at the top of the heating tank (111) and having a circle of discharge openings formed on the periphery thereof, a feed pipe (412) arranged at the top of the lead powder bin (411), and a rotating scraper (413) rotatably connected to the interior of the lead powder bin (411) and driven by a motor.

9. The energy-saving crude lead continuous refining furnace according to claim 8, characterized in that: The material discharging assembly (42) comprises a plurality of output ports (421) arranged at the bottom of the heating tank (111) and the heat-insulating tank (112), a sealing plug (422) vertically sliding in each output port (421) and controlled to rise and fall by an electric cylinder, and an output pipe (423) connecting each output port (421) and having an insulation layer on its outer surface.

10. A crude lead refining method, applied to an energy-saving crude lead continuous refining furnace as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, a heating and stirring step, wherein the lead powder is fed into the heating tank (111) through the discharge assembly (41), heated to a molten state by an electromagnetic heater, and stirred by a stirring blade (124), at which time the discharge unit (134) continuously feeds industrial salt into the arc tube (131), and the rotation of the arc tube (131) and the molten lead liquid is utilized to allow the industrial salt to be quickly and evenly mixed into the lead liquid; Step 2, a reaction step, the air cavity (26) moves along the slide bar (21) to the bottom, at which time the air exchange port (28) of the air cavity (26) is connected to the air guide tube (24), the piston (27) moves to squeeze air into the air guide tube (24), and the air bubbles are evenly released into the lead liquid through the air guide tube (24), the bubbles float in the lead liquid, and fully react with the impurity tin in the lead liquid to form a solid reactant, which floats in the lead liquid; Step three, filtering step, the air cavity (26) moves upward, at which time the stirring blade (124) stops stirring, the winch (125) and the motor fold the stirring blade (124) and the first connecting rod (123), and at the same time the umbrella rib structure (33) at the bottom of the air cavity (26) opens, and the filter net (333) unfolds. As the air cavity (26) moves upward, the filter net (333) filters the solid reactants in the lead liquid. After the air cavity (26) moves to the upper side, the pneumatic suction cup (34) rotates, sucks the solid impurities on the filter net (333) and outputs them through the pipeline output device, and the umbrella rib is restored. At this time, the air cavity (26) is connected to the air hole at the top of the sliding rod (21), the piston (27) returns to its position, and new air is sucked in, waiting for another refining process; Step 4, the material loading and unloading step, when the air cavity (26) moves upward, the sealing plug (422) at the bottom is opened, the lead liquid is output from the device, and then the feed pipe (412) inputs the lead powder into the lead powder bin (411), and the rotating scraper (413) rotates, so that the lead powder is spread in a ring shape into the heating tank (111) for subsequent heating and refining.

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