Aluminum ash recovery treatment device and treatment process thereof

Abstract

The invention discloses an aluminum ash recovery treatment device. The device comprises a mixing system, an ammonia gas treatment system, a brick making system, a fermentation system, a drying system and a firing system which are connected in sequence, according to the invention, through reaction of aluminum nitride and water in the mixing process, further promotion of the reaction in the fermentation process and removal of sulfur, ammonia, nitrogen, fluoride and the like in the high-temperature firing process, harmful substances in the aluminum ash can be efficiently removed, so that the content of the harmful substances in the final product high-aluminum clinker is lower than the national standard, and the pollution to the environment is reduced; the calcining waste gas of the tunnel kiln is fully utilized as a heat source of the drying kiln, the waste heat of the cooling zone of the tunnel kiln is utilized as a heat source of the fermentation kiln, and residual simple substance aluminum and aluminum nitride in the aluminum ash react with oxygen to generate heat in a self-sustaining manner, so that the consumption of external energy sources is reduced, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum ash treatment, and particularly relates to an aluminum ash recycling treatment device and a treatment process thereof. BACKGROUND

[0002] Aluminum ash is a solid waste generated in the production process of the aluminum industry, and contains aluminum, aluminum oxide, aluminum nitride, fluoride, sulfide and other components. If aluminum ash is not properly treated, not only will aluminum resources be wasted, but also the environment will be seriously polluted, such as the emission of ammonia, nitrogen oxides, fluorides and the like will pollute the air, and heavy metals and toxic substances therein may seep into the soil and groundwater, endangering the ecological environment and human health.

[0003] At present, the main methods for treating aluminum ash include landfill, recycling of metal aluminum, preparation of building materials and the like. The landfill method is simple and easy to implement, but has problems such as occupation of land resources and pollution of the environment; the recycling of metal aluminum method can recycle part of aluminum resources, but has a complex process and high cost; the preparation of building materials method is a relatively environmentally friendly method, but the existing treatment process still has deficiencies in harmful substance removal, resource utilization and the like, for example, the utilization of heat in the treatment process is not sufficient enough, resulting in high energy consumption, and the collection and treatment of pollutants such as ammonia gas are not efficient enough, which can easily cause secondary pollution. Therefore, there is an urgent need for an efficient, environmentally friendly and energy-saving aluminum ash recycling treatment device and treatment process. SUMMARY

[0004] The present application aims to provide an aluminum ash recycling treatment device and treatment process to solve the problems of the existing aluminum ash treatment process in harmful substance removal, resource utilization, energy consumption and pollutant treatment and the like as described in the background. The device and process can efficiently remove harmful substances such as sulfur, ammonia, nitrogen and fluorides in aluminum ash, increase the content of aluminum oxide, realize harmless treatment and resource utilization of aluminum ash, fully utilize waste heat and internal reaction heat, reduce energy consumption, efficiently collect and treat pollutants, and reduce secondary pollution.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The application relates to an aluminum ash recycling device which comprises a mixing system, an ammonia treatment system, a brick making system, a fermentation system, a drying system and a firing system which are connected in sequence; the mixing system comprises a closed mixing device which is provided with a feeding port, a discharging port and a stirring device; the stirring device comprises a driving motor, a stirring shaft and stirring blades; the driving motor is connected with the stirring shaft, and the stirring blades are installed on the stirring shaft; the ammonia treatment system comprises an ammonia collecting pipeline and an absorption device; one end of the ammonia collecting pipeline is connected with the closed mixing device, and the other end is connected with the absorption device; the absorption device is a multistage absorption tower which is provided with a spraying system; the brick making system comprises a 1300T static pressure machine brick making device and an automatic brick stacking machine; the static pressure machine brick making device is connected with the discharging port of the closed mixing device, and the automatic brick stacking machine is arranged at the discharging end of the static pressure machine brick making device; the fermentation system comprises a fermentation kiln which is provided with a temperature monitoring and adjusting device; a heat source input port of the fermentation kiln is connected with a cooling zone waste heat outlet of a tunnel kiln; the drying system comprises a drying kiln which is provided with a transmission track and a temperature control device; a heat source input port of the drying kiln is connected with a calcination waste gas outlet of the tunnel kiln; the firing system comprises a tunnel kiln which is provided with a heating device, a temperature monitoring device and a transmission track; the heating device is a natural gas heating device which is arranged at a starting end of the tunnel kiln; the temperature monitoring device is distributed in different regions of the tunnel kiln; and the transmission track penetrates through the tunnel kiln.

[0006] As a further scheme of the application: the material of the closed mixing device is a corrosion-resistant material, and the inner wall is provided with an anti-sticking coating; the rotating speed of the stirring shaft is 200-300 revolutions per minute; the stirring blades are spiral blades, and the included angle between the blades and the stirring shaft is 45-60 degrees.

[0007] As a further scheme of the application: the multistage absorption tower of the absorption device is at least two stages; the first stage spraying system sprays water, and the second stage spraying system sprays a sulfuric acid solution with a mass fraction of 20-30%; the spraying system comprises a spraying pump and spraying heads which are uniformly distributed in the absorption tower; and the flow of the spraying pump is adjusted according to the ammonia generation amount.

[0008] As a further scheme of the application: the pressing pressure of the 1300T static pressure machine brick making device is 100-150 MPa; the size of the pressing mold is replaced according to the size of the brick embryo; the automatic brick stacking machine comprises a mechanical arm and a stacking tray; the end of the mechanical arm is provided with a clamping device for clamping the brick embryo and placing the brick embryo on the stacking tray.

[0009] As a further scheme of the application: the temperature monitoring device of the fermentation kiln is a thermocouple sensor which is uniformly distributed in the fermentation kiln; the temperature adjusting device comprises a waste heat adjusting valve and an auxiliary heating device; the waste heat adjusting valve is arranged at the heat source input port; and the auxiliary heating device is started when the waste heat is insufficient to maintain the fermentation temperature at 110-120 DEG C.

[0010] As a further scheme of the present application: the transmission track of the drying kiln is a chain plate track, which can stably transport the green bricks; the temperature control device comprises a temperature sensor and a heating controller, the temperature sensor monitors the temperature in the drying kiln in real time, and the heating controller adjusts the input amount of the heat source according to the signal of the temperature sensor, so that the drying temperature is maintained at 150℃±5℃.

[0011] As a further scheme of the present application: the transmission track of the drying kiln is a chain plate track, which can stably transport the green bricks; the temperature control device comprises a temperature sensor and a heating controller, the temperature sensor monitors the temperature in the drying kiln in real time, and the heating controller adjusts the input amount of the heat source according to the signal of the temperature sensor, so that the drying temperature is maintained at 150℃±5℃.

[0012] An aluminum ash recycling process, characterized in that it comprises the following steps: The mixing step: the aluminum ash is put into a closed mixing device through a feeding port, 3%-10% of calcium oxide and 10%-25% of water based on the mass of the aluminum ash are added, a stirring device is started, the stirring shaft is rotated at a speed of 200-300 revolutions per minute, and the aluminum ash, calcium oxide and water are fully mixed for 10-20 minutes, and in the mixing process, the aluminum nitride in the aluminum ash reacts with water to generate aluminum oxide and ammonia gas; The ammonia gas collecting and processing step: the ammonia gas released in the mixing process is introduced into an absorption device through an ammonia gas collecting pipeline, the first-stage spraying water absorbs the ammonia gas to form ammonia water, the second-stage spraying sulfuric acid solution reacts with the ammonia water to generate ammonium sulfate, the ammonium sulfate solution is collected, and ammonium sulfate products are obtained through evaporation crystallization, filtration and drying; The brick making step: the mixed and processed materials are transported from the discharge port of the closed mixing device to a 1300T static press brick making device, are pressed to form green bricks under a pressure of 100-150MPa, and then are stacked by an automatic brick stacking machine; The fermentation step: the stacked green bricks are transported to a fermentation kiln, the tunnel kiln cooling belt waste heat is utilized to heat the fermentation kiln, the temperature monitoring and adjusting device is utilized to maintain the temperature in the kiln at 110℃-120℃, and the reaction of the aluminum nitride and water is further promoted by fermenting for 6-8 hours; The drying step: the fermented green bricks are stacked again by a stacking machine, are transported into a drying kiln through the transmission track of the drying kiln, and are dried at about 150℃ for about 12 hours by utilizing the tunnel kiln calcination waste gas as a heat source, so that the water content of the green bricks is less than 1%. Firing step: the dried brick embryo is transported into the tunnel kiln through the transmission track of the tunnel kiln, the natural gas heating device is started when the kiln is started, the natural gas heating device is closed when the temperature in the kiln reaches 400 DEG C, the temperature in the kiln is increased to 1200-1400 DEG C by using the oxidation reaction of the residual elemental aluminum, aluminum nitride and oxygen in the brick embryo to sustain heating, and the temperature is maintained for 2-3 hours, harmful substances such as sulfur, ammonia, nitrogen and fluoride in the aluminum ash are removed, the content of aluminum oxide is increased, and high-aluminum clinker is prepared; Cooling and packaging step: the high-aluminum clinker is moved to the cooling zone of the tunnel kiln through the transmission track, and is naturally cooled to room temperature, and then is crushed or directly packaged according to the requirements of the customer.

[0013] As a further scheme of the application: in step (1), the addition amount of calcium oxide is preferably 5%-8%, the addition amount of water is preferably 15%-20%, the stirring speed is preferably 250 rpm, and the stirring time is preferably 15 minutes.

[0014] Compared with the prior art, the application has the following beneficial effects: Significant harmful substance removal effect: through the reaction of aluminum nitride and water in the mixing process, the further promotion of the reaction in the fermentation process, and the removal of sulfur, ammonia, nitrogen and fluoride in the high-temperature firing process, the harmful substances in the aluminum ash can be efficiently removed, the content of harmful substances in the final product high-aluminum clinker is lower than the national standard, and the pollution to the environment is reduced.

[0015] High resource utilization rate: not only the aluminum resources in the aluminum ash are recovered, but also the content of aluminum oxide is increased, the ammonia gas generated in the reaction process is treated by absorption to produce ammonium sulfate products, the comprehensive utilization of resources is realized, and the waste of resources is reduced.

[0016] Low energy consumption: the calcination waste gas of the tunnel kiln is used as the heat source of the drying kiln, the waste heat of the cooling zone of the tunnel kiln is used as the heat source of the fermentation kiln, and the residual elemental aluminum and aluminum nitride in the aluminum ash are used to react with oxygen to sustain heating, thereby reducing the consumption of external energy and reducing the production cost.

[0017] High efficiency of pollutant treatment: through the closed mixing equipment and the multi-stage absorption device, the ammonia gas released in the mixing process is efficiently collected and treated, the emission of ammonia gas is reduced, and secondary pollution is avoided. DETAILED DESCRIPTION

[0018] The technical scheme of the application will be further described in detail in combination with the specific embodiments.

[0019] The application discloses an aluminum ash recycling device, which comprises a mixing system, an ammonia treatment system, a brick making system, a fermentation system, a drying system and a firing system connected in sequence. The mixing system comprises a closed mixing device provided with a feeding port, a discharging port and a stirring device. The feeding port is used for feeding aluminum ash, calcium oxide and water respectively, the stirring device comprises a driving motor, a stirring shaft and stirring blades, the driving motor drives the stirring shaft to rotate, and the stirring blades are used for fully mixing the materials, so that the aluminum ash is uniformly contacted with the calcium oxide and water, and conditions are created for subsequent reactions. The ammonia treatment system comprises an ammonia collection pipeline and an absorption device. The ammonia collection pipeline is connected with the closed mixing device and is used for collecting the ammonia released in the mixing process. The absorption device is a multi-stage absorption tower, which is provided with a spraying system. Ammonia is absorbed by the first-stage spraying water, and further absorption is performed by the second-stage spraying sulfuric acid solution, so that the ammonia absorption efficiency is improved, and an ammonium sulfate product is produced. The brick making system comprises a 1300T static pressure brick making device and an automatic brick stacking machine. The static pressure brick making device is used for pressing the mixed and treated materials to form a brick embryo, and the automatic brick stacking machine is used for stacking the brick embryo, so as to facilitate subsequent fermentation and transportation. The fermentation system comprises a fermentation kiln, which is provided with a temperature monitoring and adjusting device, and the heat source of the temperature monitoring and adjusting device comes from the residual heat of a cooling zone of a tunnel kiln. The temperature monitoring device is used for monitoring the temperature in the fermentation kiln in real time, and the adjusting device controls the input of the residual heat according to the monitoring result, so that the fermentation temperature is controlled in the range from 110 DEG C to 120 DEG C, and the aluminum nitride in the aluminum ash is fully reacted with water to generate aluminum oxide and ammonia. The drying system comprises a drying kiln, which is connected with the tunnel kiln and uses the calcination waste gas of the tunnel kiln as a heat source. The drying kiln is provided with a conveying track and a temperature control device. The conveying track is used for conveying the brick embryo, and the temperature control device is used for maintaining the drying temperature at about 150 DEG C, so that the drying time is about 12h, and the moisture content of the brick embryo is less than 1%. The firing system comprises a tunnel kiln, which is provided with a heating device, a temperature monitoring device and a conveying track. The heating device uses natural gas to heat when the tunnel kiln is started, and when the temperature in the kiln reaches 400 DEG C, the residual elemental aluminum and aluminum nitride in the aluminum ash are used to react with oxygen to generate self-sustaining heat, so that the temperature reaches 1200 DEG C to 1400 DEG C, and the firing requirement is met. The conveying track is used for conveying the brick embryo through different regions of the tunnel kiln to complete the firing process. EMBODIMENT

[0020] The application discloses an aluminum ash recycling device, which comprises a mixing system, an ammonia treatment system, a brick making system, a fermentation system, a drying system and a firing system connected in sequence. The mixing system comprises a closed mixing device provided with a feeding port, a discharging port and a stirring device. The feeding port is used for feeding aluminum ash, calcium oxide and water respectively, the stirring device comprises a driving motor, a stirring shaft and stirring blades, the driving motor drives the stirring shaft to rotate, and the stirring blades are used for fully mixing the materials, so that the aluminum ash is uniformly contacted with the calcium oxide and water, and conditions are created for subsequent reactions. The ammonia treatment system comprises an ammonia collection pipeline and an absorption device. The ammonia collection pipeline is connected with the closed mixing device and is used for collecting the ammonia released in the mixing process. The absorption device is a multi-stage absorption tower, which is provided with a spraying system. Ammonia is absorbed by the first-stage spraying water, and further absorption is performed by the second-stage spraying sulfuric acid solution, so that the ammonia absorption efficiency is improved, and an ammonium sulfate product is produced. The brick making system comprises a 1300T static pressure brick making device and an automatic brick stacking machine. The static pressure brick making device is used for pressing the mixed and treated materials to form a brick embryo, and the automatic brick stacking machine is used for stacking the brick embryo, so as to facilitate subsequent fermentation and transportation. The fermentation system comprises a fermentation kiln, which is provided with a temperature monitoring and adjusting device, and the heat source of the temperature monitoring and adjusting device comes from the residual heat of a cooling zone of a tunnel kiln. The temperature monitoring device is used for monitoring the temperature in the fermentation kiln in real time, and the adjusting device controls the input of the residual heat according to the monitoring result, so that the fermentation temperature is controlled in the range from 110 DEG C to 120 DEG C, and the aluminum nitride in the aluminum ash is fully reacted with water to generate aluminum oxide and ammonia. The drying system comprises a drying kiln, which is connected with the tunnel kiln and uses the calcination waste gas of the tunnel kiln as a heat source. The drying kiln is provided with a conveying track and a temperature control device. The conveying track is used for conveying the brick embryo, and the temperature control device is used for maintaining the drying temperature at about 150 DEG C, so that the drying time is about 12h, and the moisture content of the brick embryo is less than 1%. The firing system comprises a tunnel kiln, which is provided with a heating device, a temperature monitoring device and a conveying track. The heating device uses natural gas to heat when the tunnel kiln is started, and when the temperature in the kiln reaches 400 DEG C, the residual elemental aluminum and aluminum nitride in the aluminum ash are used to react with oxygen to generate self-sustaining heat, so that the temperature reaches 1200 DEG C to 1400 DEG C, and the firing requirement is met. The conveying track is used for conveying the brick embryo through different regions of the tunnel kiln to complete the firing process. Mixing step: 1000kg of aluminum ash is put into a closed mixing device, 50kg of calcium oxide (5% of the mass of the aluminum ash) and 200kg of water (20% of the mass of the aluminum ash) are added, and a stirring device is started to stir for 15 minutes at a rotating speed of 250r / min.

[0021] Ammonia collection and treatment step: The ammonia released during the mixing process is introduced into the absorption device through the ammonia collection pipeline, the first stage sprays water to absorb ammonia, the second stage sprays a 25% by mass sulfuric acid solution, and ammonium sulfate solution is collected, which is treated to obtain about 10 kg of ammonium sulfate product.

[0022] Brick making step: The mixed and treated material is transported to a 1300T static press brick making equipment, and is pressed to form a brick embryo under a pressure of 120 MPa, and then the brick embryo is stacked by an automatic brick stacking machine.

[0023] Fermentation step: The stacked brick embryo is transported to a fermentation kiln, the tunnel kiln cooling belt waste heat is used to heat the fermentation kiln, the temperature in the kiln is maintained at 115°C, and the fermentation time is 7 hours.

[0024] Drying step: After the fermented brick embryo is stacked again by a stacking machine, it is put into a drying kiln, the tunnel kiln calcination waste gas is used as a heat source, the drying temperature is controlled at 150°C, the drying time is 12 hours, and the moisture of the brick embryo is reduced to 0.8%.

[0025] Firing step: The dried brick embryo is transported into a tunnel kiln, natural gas is used for heating when the kiln is started, the natural gas is closed when the temperature in the kiln reaches 400°C, the temperature is increased to 1300°C by using internal reaction self-sustaining heating, the temperature is maintained at 1300°C for 2.5 hours, and the high alumina clinker is obtained after cooling. The detection shows that the content of aluminum oxide in the high alumina clinker is 75%, and the removal rates of harmful substances such as sulfur, ammonia, nitrogen and fluoride are all above 90%. Example

[0026] An aluminum ash recycling process, comprising the following steps: Mixing step: 1000 kg of aluminum ash is put in, 30 kg of calcium oxide (3% of the mass of aluminum ash) and 150 kg of water (15% of the mass of aluminum ash) are added, the stirring speed is 200 revolutions per minute, and the stirring time is 20 minutes.

[0027] Ammonia collection and treatment step: About 8.5 kg of ammonium sulfate product is obtained after absorption treatment.

[0028] Brick making step: The pressing pressure is 100 MPa, and the brick embryo is formed.

[0029] Fermentation step: The fermentation temperature is 110°C, and the fermentation time is 8 hours.

[0030] Drying step: The drying temperature is 150°C, the drying time is 12 hours, and the moisture of the brick embryo is 0.9%.

[0031] Firing step: The firing temperature is 1200°C, the maintaining time is 3 hours, and the high alumina clinker is obtained. The detection shows that the content of aluminum oxide is 72%, and the removal rates of harmful substances are all above 85%. Example

[0032] An aluminum ash recycling process, comprising the following steps: Mixing step: 1000 kg of aluminum ash, 100 kg of calcium oxide (10% of the mass of aluminum ash) and 250 kg of water (25% of the mass of aluminum ash) are added, the stirring speed is 300 rpm, and the stirring time is 10 minutes.

[0033] Ammonia gas collection and treatment step: about 12 kg of ammonium sulfate product is obtained.

[0034] Brick making step: the pressing pressure is 150 MPa.

[0035] Fermentation step: the fermentation temperature is 120°C, and the fermentation time is 6 hours.

[0036] Drying step: the moisture content of the brick embryo is 0.7%.

[0037] Firing step: the firing temperature is 1400°C, the holding time is 2 hours, the alumina content of the high-alumina clinker is 78%, and the removal rate of harmful substances is all above 92%. Example

[0038] An aluminum ash recycling process, comprising the following steps: Mixing step: 1000 kg of aluminum ash, 80 kg of calcium oxide (8% of the mass of aluminum ash) and 200 kg of water (20% of the mass of aluminum ash) are added, the stirring speed is 250 rpm, and the stirring time is 15 minutes.

[0039] Ammonia gas collection and treatment step: about 11.5 kg of ammonium sulfate product is obtained.

[0040] Brick making step: normal brick making.

[0041] Fermentation step: normal fermentation.

[0042] Drying step: normal drying.

[0043] Firing step: the firing temperature is 1300°C, the holding time is 2.5 hours, the high-alumina clinker has good indicators, the alumina content is 76%, and the removal rate of harmful substances is high. Example

[0044] An aluminum ash recycling process, comprising the following steps: Mixing step: 1000 kg of aluminum ash, 60 kg of calcium oxide (6% of the mass of aluminum ash) and 180 kg of water (18% of the mass of aluminum ash) are added, the stirring speed is 220 rpm, and the stirring time is 18 minutes.

[0045] Ammonia gas collection and treatment step: about 10.5 kg of ammonium sulfate product is obtained.

[0046] Brick making step: the pressing pressure is 130 MPa.

[0047] Fermentation step: fermentation temperature 118℃, fermentation time 6.5 hours.

[0048] Drying step: brick embryo moisture 0.85%.

[0049] Firing step: firing temperature 1350℃, maintaining for 2.3 hours, high alumina clinker mass meets the requirements, alumina content 74%, and harmful substance removal effect is remarkable.

[0050] Effect of different calcium oxide addition amounts on ammonia gas collection amount: Calcium oxide addition (mass percentage of aluminum dross) 3% 5% 8% 10% Ammonia gas collection (kg / t aluminum dross) 8.5 10.2 11.5 12.0 From the above table data, it can be seen that with the increase of calcium oxide addition amount, the ammonia gas collection amount gradually increases. When the calcium oxide addition amount is 8%, the ammonia gas collection amount reaches 11.5kg / t of aluminum ash, and when it continues to increase to 10%, the ammonia gas collection amount increases by a smaller margin. This is because calcium oxide can react with acidic substances in aluminum ash, promote the reaction of aluminum nitride with water, and thus release more ammonia gas, but when the calcium oxide addition amount exceeds a certain range, the reaction tends to be saturated, and the ammonia gas collection amount increases by a smaller margin.

[0051] Effect of different water addition amounts on brick embryo forming quality: From the above table data, it can be seen that when the water addition amount is 20%, the brick embryo compressive strength is the highest, reaching 40MPa. If the water addition amount is too small, the material mixing is uneven, the brick embryo forming is difficult, and the compressive strength is low; if the water addition amount is too large, it will cause the brick embryo to evaporate too much water during the drying process, resulting in cracks and a decrease in compressive strength. Therefore, the water addition amount is controlled within the range of 10%-25%, which can ensure that the brick embryo has good forming quality, and 20% is the best addition amount.

[0052] Effect of different firing temperatures on harmful substance removal rate: From the above table data, it can be seen that with the increase of firing temperature, the removal rates of harmful substances such as sulfur, ammonia, nitrogen, and fluoride gradually increase. At 1300℃, the removal rates of various harmful substances all reach a high level, and when the temperature continues to rise to 1400℃, the removal rate increases by a smaller margin. Considering energy consumption and removal effect comprehensively, the firing temperature of 1200-1400℃ can meet the process requirements, and 1300℃ is a relatively optimal temperature.

[0053] Effect of using or not using waste heat on energy consumption: The above table data shows the energy consumption of using tunnel kiln calcination waste gas and cooling zone waste heat and not using waste heat. The results show that the energy consumption per unit product is 150kWh / t of aluminum ash when using waste heat, and the energy consumption is 250kWh / t of aluminum ash when not using waste heat. Using waste heat can reduce energy consumption by 40%, significantly reducing production cost, and reflecting the energy-saving advantage of the process of the present application.

[0054] Influence of different stirring speeds on mixing uniformity: Mixing uniformity is an important index to measure the mixing effect of materials, and the smaller the standard deviation is, the more uniform the mixing is. The above data show that when the stirring speed reaches 250 rpm, the mixing uniformity no longer improves obviously, and therefore, the stirring speed of 200-300 rpm can ensure the mixing effect while avoiding excessive energy consumption.

[0055] It can be seen from the above comparative experimental data that the treatment process of the application can effectively improve the ammonia gas collection amount, ensure the brick embryo forming quality, efficiently remove harmful substances and reduce energy consumption under the reasonable control of the parameters such as the calcium oxide and water addition amount, firing temperature and stirring speed, and has significant beneficial effects.

[0056] The preferred embodiments of the application are described in detail above, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. An aluminum ash recovery and processing device, characterized in that: It includes a mixing system, an ammonia treatment system, a brick making system, a fermentation system, a drying system and a firing system connected in sequence; the mixing system includes a closed mixing device, which is provided with a feed port, a discharge port and a stirring device, and the stirring device includes a drive motor, a stirring shaft and a stirring blade, the drive motor is connected to the stirring shaft, and the stirring blade is installed on the stirring shaft; the ammonia treatment system includes an ammonia collection pipe and an absorption device, one end of the ammonia collection pipe is connected to the closed mixing device, and the other end is connected to the absorption device, the absorption device is a multi-stage absorption tower, and a spray system is provided in the tower; the brick making system includes a 1300T static pressure brick making equipment and an automatic brick stacking machine, the static pressure brick making equipment and The discharge port of the closed mixing equipment is connected, and the automatic brick stacking machine is arranged at the discharge end of the static pressure brick making equipment; the fermentation system includes a fermentation kiln, which is provided with a temperature monitoring and regulating device, and the heat source input port of the fermentation kiln is connected to the waste heat outlet of the cooling zone of the tunnel kiln; the drying system includes a drying kiln, which is provided with a transmission track and a temperature control device, and the heat source input port of the drying kiln is connected to the calcination exhaust gas outlet of the tunnel kiln; the firing system includes a tunnel kiln, which is provided with a heating device, a temperature monitoring device and a transmission track. The heating device is a natural gas heating device, which is arranged at the furnace start end of the tunnel kiln, the temperature monitoring devices are distributed in different areas of the tunnel kiln, and the transmission track runs through the tunnel kiln.

2. The aluminum ash recovery and processing device according to claim 1, characterized in that: The closed mixing equipment is made of corrosion-resistant material, and the inner wall is provided with an anti-stick coating; the rotation speed of the stirring shaft is 200-300 rpm, the stirring blade is a spiral blade, and the angle between the blade and the stirring shaft is 45°-60°.

3. The aluminum ash recovery and processing device according to claim 1, characterized in that: The multi-stage absorption tower of the absorption device has at least two stages. The first-stage spray system sprays water, and the second-stage spray system sprays a sulfuric acid solution with a mass fraction of 20%-30%. The spray system includes a spray pump and spray heads, and the spray heads are evenly distributed in the absorption tower. The flow rate of the spray pump is adjusted according to the amount of ammonia generated.

4. The aluminum ash recovery and processing device according to claim 1, characterized in that: The pressing pressure of the 1300T static press brick making equipment is 100-150MPa, and the size of the pressing mold is changed according to the specifications of the brick blank; the automatic brick stacking machine includes a robotic arm and a stacking pallet. The end of the robotic arm is provided with a clamping device for clamping the brick blank and placing it on the stacking pallet.

5. The aluminum ash recovery and processing device according to claim 1, characterized in that: The temperature monitoring device of the fermentation kiln is a thermocouple sensor, which is evenly distributed in the fermentation kiln. The temperature regulating device includes a waste heat regulating valve and an auxiliary heating device. The waste heat regulating valve is arranged at the heat source input port. The auxiliary heating device is started when the waste heat is insufficient to maintain the fermentation temperature at 110℃-120℃.

6. The aluminum ash recovery and processing device according to claim 1, characterized in that: The transmission track of the drying kiln is a chain plate track, which can carry the brick embryos for smooth transportation; the temperature control device includes a temperature sensor and a heating controller. The temperature sensor monitors the temperature in the drying kiln in real time, and the heating controller adjusts the input of the heat source according to the signal of the temperature sensor to maintain the drying temperature at 150℃±5℃.

7. The aluminum ash recovery and processing device according to claim 1, characterized in that: The transmission track of the tunnel kiln is a roller track, and the bricks are placed on the roller track and move through the tunnel kiln with the roller track; the temperature monitoring device is an infrared temperature sensor, which can monitor the surface temperature of the bricks in real time; the kiln body of the tunnel kiln is built with thermal insulation materials to reduce heat loss.

8. An application of an aluminum ash recovery and treatment device according to any one of claims 1 to 7, characterized in that: An aluminum ash recovery and treatment process comprises the following steps: Mixing step: aluminum ash is fed into a closed mixing device through a feed port, calcium oxide accounting for 3% to 10% of the weight of the aluminum ash and water accounting for 10% to 25% is added, a stirring device is started, and the stirring shaft is rotated at a speed of 200 to 300 rpm. The stirring is carried out for 10 to 20 minutes to fully mix the aluminum ash, calcium oxide and water. During the mixing process, aluminum nitride in the aluminum ash reacts with water to generate aluminum oxide and ammonia gas. Ammonia collection and treatment steps: ammonia released during the mixing process is introduced into an absorption device through an ammonia collection pipeline. Water is sprayed in the first stage to absorb the ammonia gas to form ammonia water. Sulfuric acid solution is sprayed in the second stage to react with the ammonia water to form ammonium sulfate. The ammonium sulfate solution is collected and subjected to evaporation, crystallization, filtration, and drying to obtain the ammonium sulfate product. Brick making steps: The mixed materials are transported from the discharge port of the closed mixing equipment to the 1300T static pressure brick making equipment, where they are pressed under a pressure of 100-150MPa to form brick embryos, which are then stacked by an automatic brick stacking machine; Fermentation step: The stacked bricks are transported to the fermentation kiln, where the residual heat from the tunnel kiln cooling zone is used to heat the fermentation kiln. The temperature inside the kiln is maintained at 110-120°C through temperature monitoring and regulation devices. The fermentation is carried out for 6-8 hours to further promote the reaction between aluminum nitride and water. Drying step: The fermented bricks are stacked again by the stacking machine and then enter the drying kiln through the transmission track of the drying kiln. The tunnel kiln calcination exhaust gas is used as a heat source and dried at about 150℃ for about 12 hours to reduce the moisture content of the bricks to less than 1%. Firing steps: The dried bricks are transported to the tunnel kiln via the tunnel kiln's transmission track. The natural gas heating device is turned on when the furnace is started. When the temperature in the kiln reaches 400°C, the natural gas heating device is turned off. The residual aluminum and aluminum nitride in the bricks react with oxygen to produce self-sustaining heat, raising the kiln temperature to 1200-1400°C and maintaining this temperature for 2-3 hours. This removes harmful substances such as sulfur, ammonia, nitrogen, and fluoride in the aluminum ash, increases the alumina content, and produces high-aluminum clinker. Cooling and packaging steps: The high-alumina clinker moves along the conveyor track to the tunnel kiln cooling zone, naturally cools to room temperature, and then is crushed according to customer requirements or directly packaged for sale.

9. The aluminum ash recovery process according to claim 8, characterized in that: In step (1), the amount of calcium oxide added is preferably 5%-8%, and the amount of water added is preferably 15%-20%; the stirring speed is preferably 250 rpm, and the stirring time is preferably 15 minutes.