Efficient energy-saving double-hearth immersion smelting furnace

Abstract

The invention relates to the related field of smelting furnaces, in particular to an efficient energy-saving type double-hearth immersion smelting furnace. The heating and heat recovery device comprises a dust removal cloth bag, a smoke hood, a heat storage preheating system, a burner, an air compressor and an air pipe, the heat storage preheating system is arranged outside the upper portion of a peripheral wall, the smoke hood is arranged inside the peripheral wall, the smoke hood sucks gas into the heat storage preheating system, and the dust removal cloth bag is arranged on the heat storage preheating system; the air compressor compresses combustion-supporting air into the air pipe, and the air pipe is connected with the burner after passing through the heat storage preheating system; the furnace bottom comprises a heat preservation layer, an impermeable layer and a working layer from bottom to top. And the insulating layer adopts three layers of insulating bricks built at the bottom. The masonry directions of the furnace bottom insulating bricks are staggered, so that gaps are reduced; and the heat preservation effect is good, so that a large-area molten pool can be designed and manufactured at the furnace bottom according to requirements, and the product production is not influenced.

Description

Technical Field

[0001] The present invention relates to the field of smelting furnaces, and particularly to an energy-efficient double-hearth submerged smelting furnace. Background Art

[0002] In modern industrial production, especially in the field of metal smelting, energy conservation and environmental protection in the smelting process have become an important focus that cannot be ignored. Although the traditional single-hearth furnace design can complete basic smelting tasks, it has limitations in terms of energy efficiency and environmental protection. Firstly, the single-hearth smelting furnace cannot fully utilize waste heat energy, and there is serious heat loss, resulting in high energy consumption, which does not meet the goals of low-carbon economy. Secondly, during single-hearth operation, it is difficult to control the temperature inside the furnace, and the heat field distribution is uneven, affecting the quality of metal smelting. Moreover, single-hearth operation easily causes rapid wear of the furnace lining, frequent furnace shutdowns for maintenance, and affects production continuity.

[0003] In view of this, there is an urgent need for an innovation to design a double-hearth technology that can not only be energy-efficient and improve smelting efficiency, but also reduce energy consumption, optimize heat energy management, extend the life of the furnace lining, and reduce the maintenance cycle.

[0004] The Chinese utility model patent "A Double-chamber Aluminum Alloy Melting Furnace" (Application No. 202222102853.9) discloses a melting crucible and a charging crucible are arranged side by side and inlaid in the furnace body. The openings of the melting crucible and the charging crucible are located on the working surface of the furnace body. The melting chamber of the melting crucible is communicated with the charging chamber of the charging crucible through a discharge hole, and the discharge hole is close to the bottom of the melting chamber. In the double-chamber aluminum alloy melting furnace of the present utility model, by arranging a melting crucible and a charging crucible side by side in the furnace body and connecting the melting chamber of the melting crucible with the charging chamber of the charging crucible through the discharge hole, the dross generated after the aluminum alloy in the melting chamber melts floats on the molten metal. The better-quality molten metal in the melting chamber flows into the charging chamber through the discharge hole for use by the die-casting machine for pouring. During the entire smelting process, without removing the dross, better-quality molten metal can be obtained. The Chinese invention patent "A Double-chamber Recycled Aluminum Melting Furnace" (Application No. 202410193452.X), this invention uses a lead screw to drive a guiding member to move downward under the guidance of a guiding chute. The aluminum material input is dispersed by the guiding plate, so that when the aluminum material falls into the furnace chamber, there are multiple falling points. And through the guidance of the guiding chute, when the guiding member moves to the bottom end, it rotates, changing the falling points. By increasing the falling points, it effectively avoids the formation of a large conical accumulation of the aluminum material, reduces the stacking thickness of the aluminum material, and increases the falling and spreading area of the aluminum material, which is conducive to accelerating the overall smelting of the aluminum material and improving the smelting efficiency of the aluminum material. Through the combination of the anti-adhesion film and the cleaning rod, it effectively avoids the retention and accumulation of the crushed aluminum material at the feeding place, and enables all the aluminum material to enter the furnace chamber for smelting.

[0005] The above-mentioned patent still has deficiencies such as fast heat dissipation of the furnace body and direct discharge of the generated waste gas, resulting in relatively high overall energy consumption. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides an energy-efficient double-chamber submerged smelting furnace. The furnace bottom of the present invention includes three layers of thermal insulation layers, an anti-seepage layer, and a working layer from bottom to top. The thermal insulation layer is built with three layers of thermal insulation bricks at the bottom. The laying direction of the second layer of bricks is staggered with that of the first layer of bricks to minimize the formation of gaps. The laying direction of the thermal insulation bricks at the furnace bottom of the present invention is staggered to reduce gaps; the thermal insulation effect is good, so the furnace bottom can be designed and manufactured with a larger area of the molten pool according to requirements without affecting product production.

[0007] The technical solution of the present invention is: an energy-efficient double-chamber submerged smelting furnace, including a furnace bottom, surrounding walls, a furnace top, a furnace door, and a partition wall. The surrounding walls are arranged above the furnace bottom, and a partition wall is arranged inside the surrounding walls. The partition wall divides the smelting furnace into a heating chamber and a waste chamber. A furnace door is arranged in the waste chamber, and heating and heat recovery devices are arranged in both the heating chamber and the waste chamber; the characteristics are: the heating and heat recovery device includes a dust removal cloth bag, a smoke hood, a regenerative preheating system, a burner, an air compressor, and an air pipe. The regenerative preheating system is arranged at the outer position of the upper part of the surrounding walls, the smoke hood is arranged inside the surrounding walls, the smoke hood sucks in gas and enters the regenerative preheating system, and a dust removal cloth bag is arranged on the regenerative preheating system; the air compressor compresses the combustion-supporting air into the air pipe, and the air pipe is connected to the burner after passing through the regenerative preheating system; the furnace bottom includes three layers of thermal insulation layers, an anti-seepage layer, and a working layer from bottom to top; the thermal insulation layer is built with three layers of thermal insulation bricks at the bottom. The laying direction of the second layer of bricks is staggered with that of the first layer of bricks, the horizontal brick joint is 1.0 mm, and the vertical brick joint is 1.1 mm. The first layer of bricks, the second layer of bricks, and the third layer of bricks together form the thermal insulation layer, and an anti-seepage layer is arranged on the first layer of bricks; the thickness of the anti-seepage layer uses dense castable, and the working layer uses corundum-based non-sticking aluminum castable. The regenerative preheating system includes a lower cavity, an upper cavity, a high-pressure air pipe, a vibrating plate, a dust discharge pipe, alumina balls, a filter screen, a first air inlet pipe, a first air outlet pipe, a second air inlet pipe, a second air outlet pipe, a support column, a suction air pipe, a main exhaust pipe, and a dust collection box; the inside of the regenerative preheating system is a structure with multiple filter screens spaced by alumina balls. Alumina balls are placed between the multiple filter screens. The regenerative preheating system is connected to the smoke hood through the suction air pipe and connected to the dust removal cloth bag through the main exhaust pipe. A high-pressure air pipe is arranged in the upper cavity, and the vibrating plate is arranged below the alumina balls and the filter screen; a dust discharge pipe is arranged in the lower cavity, and the lower part of the dust discharge pipe is connected to the dust collection box; the upper cavity and the lower cavity are formed by two layers of metals, and the two layers of metals are connected by support columns. The upper cavity is a closed space, and the two ends are respectively connected to the first air inlet pipe and the first air outlet pipe; the lower cavity is a closed space, and the two ends are respectively connected to the second air inlet pipe and the second air outlet pipe. The first air inlet pipe, the first air outlet pipe, the second air inlet pipe, and the second air outlet pipe are respectively connected to the air pipe.

[0008] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the partition wall is connected to the furnace top, and three holes can be opened in the upper half.

[0009] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the surrounding walls adopt furnace wall insulation bricks 1.0, are single-layer masonry, and tertiary fireclay bricks are used in the places filled in the surrounding walls.

[0010] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the furnace top is built with bricks of three materials, namely first-class fireclay T-46 arch foot bricks, first-class fireclay furnace arch T-26, and first-class fireclay furnace arch T-7; it is built with bricks of two materials, namely first-class fireclay furnace arch T-26 and first-class fireclay furnace arch T-7, and T-26 clamps the whole arch.

[0011] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the air compressor is a permanent magnet variable frequency two-stage compression screw air compressor.

[0012] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the furnace door adopts closed charging of the furnace door.

[0013] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the filter screen is a stainless steel filter screen.

[0014] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the alumina balls have a diameter of 25 MM.

[0015] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the burner adopts a dispersion regenerative burner, natural gas is introduced into the furnace through the gun, and immediately afterwards, the preheated combustion-supporting air on the left or right side of the gun pushes the natural gas to mix in the furnace.

[0016] An energy-efficient double-chamber submerged smelting furnace as described above is characterized in that: the thickness of the anti-seepage layer is 120 mm.

[0017] The beneficial effects of the present invention are: the present invention ensures uniform temperature in the furnace, complementary heat energy supply, improves the smelting quality, reduces the lining loss at the same time, ensures continuous operation, and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a physical diagram of the dispersion combustion system.

[0020] Figure 3 It is a structural schematic diagram of the regenerative preheating system.

[0021] Description of reference numerals: furnace bottom 1, surrounding walls 2, furnace top 3, furnace door 4, dust removal filter bags 5, smoke hood 6, regenerative preheating system 7, lower cavity 71, upper cavity 72, high-pressure air pipe 73, vibrating plate 74, dust exhaust pipe 75, alumina balls 76, filter screen 77, first intake pipe 78, first exhaust pipe 79, second intake pipe 7a, second exhaust pipe 7b, support column 7c, air suction pipe 7e, main exhaust pipe 7f, dust collection box 7g, burner 8, partition wall 9, air compressor 10, air pipe 11. Detailed implementation mode

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0023] As Figure 1 shown, an efficient energy-saving double-chamber submerged smelting furnace of the present invention includes a furnace bottom 1, surrounding walls 2, a furnace top 3, a furnace door 4, and a partition wall 9. The surrounding walls 2 are arranged above the furnace bottom 1, and the partition wall 9 is arranged inside the surrounding walls 2. The partition wall 9 divides the smelting furnace into a heating chamber and a waste material chamber. The waste material chamber is provided with a furnace door 4, and both the heating chamber and the waste material chamber are provided with heating and heat recovery devices.

[0024] As Figure 1 shown, the heating and heat recovery device of the present invention includes dust removal filter bags 5, a smoke hood 6, a regenerative preheating system 7, a burner 8, an air compressor 10, and an air pipe 11. The regenerative preheating system 7 is arranged at an external position above the surrounding walls 2, and the smoke hood 6 is arranged at an internal position of the surrounding walls. The smoke hood 6 sucks in gas and enters the regenerative preheating system 7, and the dust removal filter bags 5 are arranged on the regenerative preheating system 7. The air compressor 10 compresses the combustion-supporting air into the air pipe 11, and the air pipe 11 is connected to the burner 8 after passing through the regenerative preheating system 7. The burner 8 is arranged in the waste material chamber.

[0025] The regenerative preheating system 7 of the present invention is made of materials with good heat insulation performance: the internal working temperature is above 1000 °C, the surface temperature is lower than 150 °C, the volume is small, and the installation space is saved; the maintenance is simple and convenient. The regenerative preheating system 7 includes a plurality of regenerators. Since there is no direct physical connection between the regenerative preheating system 7 and the burner 8, no movement or disassembly of the burner 8 is required when maintaining the regenerators. The regenerative preheating system 7 of the present invention can preheat the combustion-supporting air by 100% using the high-temperature flue gas of the furnace, and the flue gas discharge temperature of the furnace is relatively low, so the waste heat of the flue gas is well utilized, and the heat loss is minimized to the greatest extent.

[0026] The partition wall 9 of the present invention is connected to the furnace top, that is, it is fully enclosed; three holes can be opened in the upper half to completely relieve the influence of the large ignition pressure in a single chamber. Feeding and stirring may both have a certain impact on the service life of the intermediate wall. After the furnace group has been used for a long time, there is a great risk of damage to the semi-enclosed intermediate wall.

[0027] The present invention can circulate the aluminum liquid in the double-chamber furnace through an aluminum water pump, and can also circulate the aluminum liquid through a permanent magnetic stirrer placed at the bottom of the furnace. The circulation volume of the aluminum liquid in the double-chamber furnace reaches 10t / min, and the aluminum liquid temperature has good uniformity and small temperature difference, which avoids excessive temperature of the local aluminum liquid and reduces the occurrence of metal burning; the vortex formed by the high-speed aluminum liquid can quickly roll the material into the aluminum liquid, avoid its contact with the air, and minimize the occurrence of oxidation. Under normal circumstances, after the aluminum liquid is released, a certain depth of aluminum liquid is left as a molten pool. The preheated furnace charge directly enters the molten pool for melting, which reduces the contact with the flame and furnace gas, thereby improving the metal yield.

[0028] The furnace bottom 1 of the present invention includes three layers of insulation layer, anti-seepage layer and working layer from bottom to top. The insulation layer adopts three layers of insulation bricks laid at the bottom, and the laying directions of the second layer of bricks and the first layer of bricks are staggered to minimize the formation of gaps. Brick joints are calculated on site: the horizontal brick joints are 1.0mm, and the longitudinal brick joints are 1.1mm, which meet the error range of 1-3mm. The first layer of bricks, the second layer of bricks and the third layer of bricks together constitute the insulation layer. The first layer of bricks is located on the top layer. After the insulation layer is laid, the anti-seepage layer is constructed on the first layer of bricks. The thickness of the anti-seepage layer is 120mm, and the dense castable NRT CLAYCAST 408A is used. The pouring method: the mold is used for grid casting. The first pouring is left with a sluice, so that the second pouring can be more closely connected with the first pouring. During pouring, a vibrating rod will be used to vibrate for 3-5 minutes). After the construction of the anti-seepage layer is completed, the working layer is constructed, using corundum non-stick aluminum castable NRTALPUMP 812C with a thickness of 300mm, and the casting method is consistent with the anti-seepage layer process. The heat preservation bricks of the furnace bottom 1 of the present invention are laid in a staggered direction to reduce the gap. The furnace bottom 1 is manufactured by the process method of the present invention, and the heat preservation effect is good, so the furnace bottom 1 can be designed and manufactured according to requirements. A larger area of ​​the molten pool will not affect the product production. Because the molten pool of the present invention is large, all waste aluminum materials can be immersed in aluminum liquid, and the aluminum liquid will completely wrap the crushed materials, effectively fully melt and refine the raw materials, shorten the production cycle, and reduce the burning of raw materials.

[0029] The surrounding walls 2 of the present invention are all made of furnace wall insulation bricks 1.0, single-layer masonry.

[0030] Where filling is required, use grade 3 clay brick T-7. The surrounding walls 2 can be constructed from outside to inside or from inside to outside. The construction method from inside to outside is: first, formwork is carried out at a position 400mm away from the surrounding walls, that is, the working layer (corundum non-stick aluminum castable NRT ALPUMP 812C) is poured first, with a thickness of 300mm and a height of 700mm, and then a layer of fiber K blanket is laid around, followed by a layer of insulation bricks (furnace wall insulation bricks 1.0), and finally, the anti-seepage layer is poured directly, with a thickness of 120mm.

[0031] The top of the furnace of the present invention 3 is built with bricks of three materials: first-class fireclay T-46 arch foot bricks, first-class fireclay furnace arch T-26, and first-class fireclay furnace arch T-7. It is built with bricks of two materials, first-class fireclay furnace arch T-26 and first-class fireclay furnace arch T-7. The use of T-26 is to clamp the entire arch, and each brick plays a role in supporting the arch, with smaller brick joints. After the masonry is completed, the first layer of pouring is started. 408A castable is used, with a thickness of 28 mm. Around the entire top of the furnace, first pour 5 mm thick, lay a layer of fiber K blanket, and then pour to 28 mm thick. After the castable of the entire top of the furnace solidifies, dry laying is carried out. 408A castable is used, with a thickness of 5 mm. The design of the arch top of the present invention can improve the service life of the furnace body and reduce the equipment failure rate.

[0032] The air compressor 10 of the present invention can be a permanent magnet variable frequency two-stage compression screw air compressor, which compresses air and natural gas to the burner respectively. The permanent magnet variable frequency two-stage compression screw air compressor is a two-stage compression, which reduces the compression ratio of each stage, reduces internal leakage, improves volumetric efficiency, reduces bearing load, and improves the service life of the main engine; two-stage compression replaces single-stage compression, and the exhaust volume increases by nearly 15%, and an energy-saving effect of up to 15% can be achieved; it ensures the accuracy, reliability and effectiveness of the rotor profile; the two-stage compression main engine is more efficient and energy-saving, and is up to 35% more energy-saving than the twin-screw air compressor.

[0033] The furnace door 4 of the present invention is preferably closed for charging. Compared with the furnace type of ordinary open-door charging, there is no flue gas leakage, less temperature loss, and good energy-saving effect.

[0034] The burner 8 of the present invention adopts a dispersed regenerative burner. Natural gas is introduced into the furnace through the gun. Immediately afterwards, the preheated combustion-supporting air on the left or right side of the gun pushes the natural gas to mix in the furnace and ignite. The combustion-supporting air is preheated in advance through the regenerative preheating system 7, and the natural gas is not preheated to improve the safety of the system. Compared with the premixed combustion burner, the dispersed regenerative burner introduces natural gas into the furnace through the spray gun, the flame is dispersed, the stiffness is low, and the damage to the material is small. Through the design of the spray gun and the flame angle, it can realize flowing combustion above the molten aluminum, which helps to realize submerged bath smelting and save energy and reduce consumption.

[0035] Such as Figure 3As shown in the figure, the heat storage and preheating system 7 of the present invention includes a lower cavity 71, an upper cavity 72, a high-pressure air duct 73, a vibrating plate 74, a dust exhaust pipe 75, alumina balls 76, a filter screen 77, a first intake pipe 78, a first exhaust pipe 79, a second intake pipe 7a, a second exhaust pipe 7b, a support column 7c, a suction air duct 7e, a main exhaust pipe 7f, and a dust collection box 7g. The filter screen 77 can be a stainless steel filter screen, and the stainless steel filter screen can be 310S (0Cr25Ni20) stainless steel, which can withstand high temperatures. Inside the heat storage and preheating system 7 is a structure with multiple layers of filter screens 77 spaced apart by alumina balls 76. From the side of the suction air duct 7e to the main exhaust pipe 7f, the mesh holes of the filter screen 77 gradually decrease from large to small, so that dust is adsorbed layer by layer, ensuring that larger dust particles are adsorbed, and enabling the subsequent dust removal bag 5 to be used for a long time.

[0036] As Figure 3 shown in the figure, alumina balls 76 are placed between the multiple layers of filter screens 77 of the present invention. The heat storage and preheating system 7 is connected to the hood 6 through the suction air duct 7e and connected to multiple dust removal bags 5 through the main exhaust pipe 7f. The alumina balls 76 of the present invention can quickly adsorb the heat of the exhaust gas and can reduce the flow rate of the gas, which is not only beneficial to heat absorption but also beneficial to the adsorption of larger dust. The diameter of the alumina balls 76 of the present invention can be 25MM. The alumina balls 76 have a large heat storage capacity, fast heat absorption and heat release; strong heat shock resistance, strong thermal shock resistance, stable performance, and long service life; not easily blocked, and can be cleaned with water, which is very convenient for maintenance. The upper cavity 72 of the present invention is provided with a high-pressure air duct 73, and the vibrating plate 74 is arranged below the alumina balls 76 and the filter screen 77. The lower cavity 71 is provided with a dust exhaust pipe 75, and the lower part of the dust exhaust pipe 75 is connected to the dust collection box 7g. During the working process of the present invention, the dust adsorbed by the filter screen 77 and the alumina balls 76 falls into the dust collection box 7g through the continuous vibration of the vibrating plate 74. For a small amount of adsorbed dust, high-pressure cold air can be used to make it break away. That is, when cleaning is required, high-pressure air is flushed through the opening of the high-pressure air duct 73, so that the dust automatically falls into the dust collection box 7g, thereby realizing long-term effective self-cleaning.

[0037] As Figure 3As shown, the overall heat storage and preheating system 7 of the present invention can be in the shape of a cuboid. The upper cavity 72 and the lower cavity 71 are formed by two layers of metal, and the two layers of metal are connected by support columns 7c, so that the heat storage and preheating system 7 of the present invention has a high load-bearing capacity. The upper cavity 72 is a closed space, and is respectively connected to a first intake pipe 78 and a first outlet pipe 79 at both ends; the lower cavity 71 is also a closed space, and is respectively connected to a second intake pipe 7a and a second outlet pipe 7b at both ends. The first intake pipe 78, the first outlet pipe 79, the second intake pipe 7a, and the second outlet pipe 7b are respectively connected to the air pipe 11. Natural gas is directly connected to the burner 8. During the working process of the present invention, combustion-supporting air enters the cavity from the first intake pipe 78 and the second intake pipe 7a respectively, and flows out from the first outlet pipe 79 and the second outlet pipe 7b respectively and enters the burner, so that the combustion-supporting air can be preheated, and the preheating temperature can reach 700 °C, greatly saving energy. When the heat storage and preheating system 7 of the present invention works, the internal working temperature is above 1000 °C, and the surface temperature is lower than 150 °C, which can greatly save energy consumption.

[0038] The device of the present invention can use the tail gas to heat the combustion-supporting air through the heat storage and preheating system 7, improving the energy utilization efficiency. The temperature of the waste gas discharged to the main exhaust pipe 7f is lower than 200 °C, and the surface temperature of the heat storage and preheating system 7 is generally lower than 150 °C, greatly reducing the energy consumption. At the same time, through the adsorption and blocking effects of the alumina balls 76 and the filter screen 77 in the heat storage and preheating system 7, most impurities can be precipitated in the heat storage and preheating system 7, and can be reused continuously by regularly flushing with high-pressure air. After the high-pressure air cleaning, the air flow passes through the main exhaust pipe 7f and flows through the dust removal bag 5. Most of the larger impurities directly fall into the dust collection box 7g, so that the dust removal bag 5 of the present invention can be used for a long time.

[0039] During the working process of the present invention, the atmospheres in the heating chamber and the waste material chamber of the double-chamber furnace are both under strict control. Among them, in the heating chamber, through the atmosphere monitoring and control technology, the oxygen content in the furnace gas is controlled at 2% - 5%, which is far lower than the oxygen content in general furnace types, effectively reducing the metal oxidation in the heating chamber; the waste material chamber is the main furnace chamber for melting and recycling aluminum waste in the double-chamber furnace. The waste material chamber is in a reducing atmosphere during operation, avoiding the occurrence of metal oxidation.

[0040] After adopting the method of the present invention, the natural gas consumption of each ton of recycled aluminum raw materials from melting to 720 °C is less than 65 cubic meters, reaching the international advanced level. The present invention can effectively utilize waste heat, reduce energy consumption in the production process, and by transforming the existing single-chamber melting furnace into a double-chamber double-hearth furnace and replacing the premixed burner with a dispersed regenerative burner, the waste heat of the flue gas can be fully utilized, the air temperature can be increased, heat loss can be reduced, and through the overall heat preservation design of the melting furnace, the natural gas consumption in the aluminum melting process can be finally reduced. According to the measurement after the actual operation of the project, the thermal efficiency utilization rate after the implementation of this technology is increased by 30%-40% compared with that of the single-chamber furnace, which can fundamentally achieve energy conservation and emission reduction in the aluminum melting process, improve the technical level of enterprise development, effectively reduce the enterprise cost, and improve the competitiveness of the enterprise.

Claims

1. An efficient and energy-saving double-chamber immersion smelting furnace, comprising a furnace bottom, surrounding walls, a furnace top, a furnace door, and a partition wall. A surrounding wall is arranged above the furnace bottom, and a partition wall is arranged inside the surrounding wall. The partition wall divides the smelting furnace into a heating chamber and a waste chamber. The waste chamber is provided with a furnace door. Both the heating chamber and the waste chamber are provided with heating and heat recovery devices; characterized in that: The heating and heat recovery device includes dust bags, smoke hoods, heat storage preheating systems, burners, air compressors, and air pipes. The heat storage preheating system is arranged at the upper external position of the surrounding walls, and the smoke hoods are arranged at the internal position of the surrounding walls. The smoke hoods suck gas into the heat storage preheating system, and dust bags are arranged on the heat storage preheating system; the air compressor compresses the combustion-supporting air into the air pipe, and the air pipe is connected to the burner after passing through the heat storage preheating system; the furnace bottom includes three layers of insulation layer, anti-seepage layer, and working layer from bottom to top; the insulation layer adopts three layers of insulation bricks laid at the bottom, and the second layer of bricks and the first layer of bricks are laid in staggered directions, the horizontal brick joints are 1.0mm, and the vertical brick joints are 1.1mm. The first layer of bricks, the second layer of bricks and the third layer of bricks together constitute the insulation layer, and an anti-seepage layer is arranged on the first layer of bricks; the thickness of the anti-seepage layer is made of dense castable, and the working layer is made of corundum non-stick aluminum castable. The heat storage preheating system includes a lower cavity, an upper cavity, a high-pressure air duct, a vibration plate, Dust exhaust pipe, aluminum oxide balls, filter screen, first air inlet pipe, first air outlet pipe, second air inlet pipe, second air outlet pipe, support column, air suction pipe, main exhaust pipe, dust collecting box; the interior of the thermal storage preheating system is a structure of aluminum oxide balls separated by multiple layers of filter screens, and aluminum oxide balls are placed between the multiple layers of filter screens. The thermal storage preheating system is connected to the smoke hood through the air suction pipe and to the dust removal bag through the main exhaust pipe. A high-pressure air duct is arranged in the upper cavity, and a vibration plate is arranged below the aluminum oxide balls and the filter screen; a dust exhaust pipe is arranged in the lower cavity, and the lower part of the dust exhaust pipe is connected to the dust collecting box; the upper cavity and the lower cavity are formed by two layers of metal, and the two layers of metal are connected by a support column. The upper cavity is a closed space, and the two ends are respectively connected to the first air inlet pipe and the first air outlet pipe; the lower cavity is a closed space, and the two ends are respectively connected to the second air inlet pipe and the second air outlet pipe, and the first air inlet pipe, the first air outlet pipe and the second air inlet pipe, and the second air outlet pipe are respectively connected to the air pipe.

2. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The partition wall is connected to the furnace roof, and three holes can be opened in the upper part.

3. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The surrounding walls are made of furnace wall insulation bricks 1.0, built in a single layer, and the surrounding walls are filled with third-grade clay bricks.

4. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The furnace roof is built with three kinds of bricks: first-class clay T-46 arch foot bricks, first-class clay furnace arch T-26, and first-class clay furnace arch T-7; the furnace roof is built with two kinds of bricks: first-class clay furnace arch T-26 and first-class clay furnace arch T-7, and T-26 clamps the entire arch.

5. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The air compressor is a permanent magnet variable frequency two-stage compression screw air compressor.

6. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The furnace door is closed for charging.

7. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The filter is a stainless steel filter.

8. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The diameter of the alumina ball is 25MM.

9. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The burner adopts a diffuse heat storage burner. Natural gas is passed into the furnace through the gun, and then the preheated combustion air on the left or right side of the gun pushes the natural gas to mix in the furnace.

10. The high-efficiency and energy-saving double-chamber submerged smelting furnace according to claim 1, characterized in that: The thickness of the anti-seepage layer is 120mm.

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