A two-stage rotary kiln process equipment for directly producing ceramic zinc oxide

Abstract

The present application relates to the technical field of metal products, and discloses a process equipment for directly producing ceramic zinc oxide by using a two-section rotary kiln, which comprises a two-section rotary kiln and a hot blast furnace system; the hot blast furnace provides heating air for the two-section rotary kiln; the two-section rotary kiln comprises two parts, i.e., a zinc oxide extraction part and an iron recovery part; the zinc oxide extraction part comprises an extractor and a dust remover, which are respectively used for extracting zinc oxide and treating dust exhaust gas; the iron recovery part comprises a reducer, a cooler and a magnetic separator, which are respectively used for reducing residues, cooling materials and separating and recovering iron; the present application directly produces ceramic zinc oxide by using a two-section rotary kiln, can simultaneously realize extraction of zinc oxide and recovery of iron, and improves production efficiency and resource utilization rate; meanwhile, the use of the hot blast furnace system provides stable and efficient heating air for the two-section rotary kiln, guarantees continuity and stability of the production process; in addition, the extractor and the dust remover are arranged, zinc oxide is effectively extracted, and dust exhaust gas is treated, so that environmental pollution is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of metal products, in particular to process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln. Background Art

[0002] Zinc oxide for ceramics is an important ceramic raw material, widely used in the production of ceramic products. Its primary function in ceramics is to increase density, hardness, and thermal shock resistance, while also improving electrical conductivity and thermal stability. Direct calcination is a common industrial production method for zinc oxide. This method involves calcining zinc-containing minerals or waste materials at high temperatures to convert them into zinc oxide. The remaining material after high-temperature calcination can be used to extract iron, further enabling comprehensive resource utilization.

[0003] Therefore, the development of a process equipment for directly producing ceramic zinc oxide and iron elements using a two-stage rotary kiln can significantly improve the production efficiency of zinc oxide and iron elements while maximizing the utilization of resources. Summary of the Invention

[0004] In view of this, the present invention proposes a process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln, aiming to maximize the utilization of resources.

[0005] The present invention provides a process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln, the process equipment comprising a two-stage rotary kiln and a hot blast furnace;

[0006] The hot blast furnace is used to provide heated air to the two-stage rotary kiln;

[0007] The two-stage rotary kiln includes a front-stage zinc oxide extraction kiln and a rear-stage iron recovery kiln;

[0008] The front-stage zinc oxide extraction kiln includes an extractor and a dust collector; wherein the extractor is used to extract zinc oxide; the dust collector is used to collect and process dust and waste gas generated during the extraction process;

[0009] The rear-stage iron recovery kiln includes a reducer, a cooler and a magnetic separator; the reducer is used to reduce the residue after zinc oxide extraction to reduce the iron element from the residue; the cooler is used to cool the reduced material and at the same time cool the reducer; the magnetic separator separates the iron from the reduced material through the action of the magnetic field to achieve iron recovery.

[0010] Preferably, the magnetic separator adopts high gradient magnetic separation technology.

[0011] Preferably, the extractor comprises a rotary cylinder, a feed port, a discharge port and an extraction burner;

[0012] A screw propeller is provided inside the rotary cylinder for pushing the raw materials forward inside the rotary cylinder; the feed port is provided at one end of the rotary cylinder for adding the raw materials into the cylinder; the discharge port is provided at the other end of the rotary cylinder for discharging the residue after the zinc oxide is extracted; the hot blast furnace is connected to the extraction burner via a hot blast duct, and the hot blast generated by the hot blast furnace is fed into the extraction burner via the hot blast duct, and the extraction burner then sprays the hot blast into the rotary cylinder to perform a pyrolysis reaction on the raw materials and extract the zinc oxide;

[0013] The dust collector is connected to the discharge port of the extractor.

[0014] Preferably, the inner wall of the rotating cylinder is coated with a protective material; the protective material includes an inorganic coating, an organic polymer coating and a ceramic material coating; wherein the inorganic coating is coated as the innermost layer of the inner wall of the rotating cylinder; the organic polymer coating is coated on top of the inorganic coating as an intermediate layer; and the ceramic material coating is coated on top of the organic polymer coating as the outermost layer;

[0015] The coating method of the protective material comprises:

[0016] preparing a sol containing an aluminum oxide precursor, and then forming an aluminum oxide coating, i.e., the inorganic coating, on the inner wall surface of the rotating cylinder through a gelation reaction;

[0017] After mixing the epoxy resin and the curing agent, the mixture is applied to the surface of the inorganic coating by spraying, and then thermally cured to form the organic polymer coating;

[0018] The zirconium oxide powder is sprayed into a plasma flame and reacts with the surface of the organic polymer coating under high temperature conditions to form the ceramic material coating.

[0019] Preferably, the reducer includes a reduction cylinder, a reduction burner and a reducing agent adding device. A spiral propeller is provided inside the reduction cylinder for continuously pushing the residue after zinc oxide extraction forward in the cylinder and performing a reduction reaction; the reducing agent adding device is used to add a reducing agent into the reduction cylinder; the hot blast furnace is connected to the reduction burner through a hot blast pipe, and the hot blast generated by the hot blast furnace is sent into the reduction burner through the hot blast pipe, and the reduction burner then sprays the hot blast into the reduction cylinder to perform a reduction reaction on the residue after zinc oxide extraction and extract iron elements.

[0020] Preferably, the cooler includes a cooling cylinder, a cooling water pipe and an exhaust device; a screw propeller is provided inside the cooling cylinder for continuously pushing the reduced material forward in the cylinder and cooling it; the cooling water pipe surrounds the outside of the cooling cylinder for providing cooling water into the cooling cylinder to cool the reduced material.

[0021] Preferably, the reduction cylinder, the cooling cylinder and the magnetic separator are connected in a linear series relationship; the reduced material coming out of the reduction cylinder first enters the cooling cylinder for cooling, and then the cooled material is sent to the magnetic separator through a transmission device;

[0022] The exhaust device is arranged at the connection between the cooling cylinder and the reducer. The exhaust device is used to discharge the waste gas generated during the cooling process. At the same time, the exhaust device is also used to cool the reducer.

[0023] Preferably, the reduction cylinder includes an inner layer, a middle layer and an outer layer, wherein the inner layer is made of corrosion-resistant and wear-resistant material, the middle layer is made of heat-resistant material, and the outer layer is made of heat-insulating material.

[0024] Preferably, the front-stage zinc oxide extraction kiln and the rear-stage iron recovery kiln are connected by a connecting assembly, and the connecting assembly is used to transfer the residue after zinc oxide extraction from the front-stage zinc oxide extraction kiln to the rear-stage iron recovery kiln;

[0025] The connecting assembly includes a transmission pipe and a residue transfer device; one end of the transmission pipe is connected to the discharge port of the front-stage zinc oxide extraction kiln, and the other end is connected to the feed port of the rear-stage iron recovery kiln, and is used to transfer the residue after zinc oxide extraction from the front-stage zinc oxide extraction kiln to the rear-stage iron recovery kiln; the residue transfer device is arranged at the connection of the transmission pipe, and is used to control the flow speed and flow of the residue to ensure that the residue can smoothly and evenly enter the rear-stage iron recovery kiln.

[0026] Preferably, the residue transfer device includes a rotary valve and a regulator; the rotary valve is arranged at the connection of the transmission pipeline and controls the flow of the residue through a rotating action; the regulator is connected to the rotary valve and is used to adjust the rotation speed of the rotary valve and the flow rate of the residue.

[0027] Preferably, the process equipment further includes an automated control system;

[0028] The automated control system is used to monitor the operating status of the process equipment in real time and to automatically adjust and control it according to the set process parameters; at the same time, the automated control system is also used to achieve remote monitoring and fault diagnosis.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention's two-stage rotary kiln directly produces ceramic zinc oxide. Its two-stage design features a front-stage zinc oxide extraction kiln and a rear-stage iron recovery kiln, achieving efficient zinc oxide extraction and iron recovery. A hot air furnace provides heated air, enabling the extractor and reducer to react at optimal temperatures, improving reaction efficiency and product quality. Furthermore, the inclusion of a dust collector and cooler effectively reduces exhaust emissions and energy consumption, making the entire process more environmentally friendly and energy-efficient.

[0031] The process equipment of the present invention also incorporates several optimized designs. For example, the screw propeller inside the extractor evenly propels the raw materials within the cylinder, improving extraction efficiency; the magnetic separator utilizes high-gradient magnetic separation technology, enabling more efficient iron separation; and the inner wall of the rotating cylinder is coated with a protective material, effectively increasing the durability and service life of the equipment.

[0032] The process equipment of the present invention also offers excellent scalability and flexibility. The design of the connection assembly allows for easy connection and disconnection of the front-end zinc oxide extraction kiln and the back-end iron recovery kiln, facilitating equipment maintenance and upgrades. The introduction of an automated control system enables automated control and remote monitoring of the entire process, significantly improving production efficiency and facilitating equipment management.

[0033] In summary, the process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln of the present invention has the advantages of high efficiency, environmental protection, energy saving, durability, and flexibility. It is of great significance for improving zinc oxide production efficiency and reducing production costs. It also provides new ideas and directions for technological progress and industrial upgrading in related industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 A schematic structural diagram of a process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln provided in an embodiment of the present invention.

[0036] Among them, 1. Rotating cylinder; 2. Extraction burner; 3. Reduction cylinder; 4. Reduction burner; 5. Discharge port; 6. Hot air furnace; 7. Hot air duct; 8. Dust collector; 9. Cooling cylinder; 10. Cooling water duct; 11. Exhaust device; 12. Magnetic separator. DETAILED DESCRIPTION

[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features described in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0038] See Figure 1 , this embodiment provides a process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln, the process equipment comprising a two-stage rotary kiln and a hot blast furnace 6;

[0039] The hot air stove 6 is used to provide heated air to the two-stage rotary kiln;

[0040] The two-stage rotary kiln includes a front-stage zinc oxide extraction kiln and a rear-stage iron recovery kiln;

[0041] The front-stage zinc oxide extraction kiln includes an extractor and a dust collector 8; wherein the extractor is used to extract zinc oxide; the dust collector 8 is used to collect and process dust and waste gas generated during the extraction process;

[0042] The rear iron recovery kiln includes a reducer, a cooler and a magnetic separator 12; the reducer is used to reduce the residue after zinc oxide extraction to reduce the iron element from the residue; the cooler is used to cool the reduced material, and the cooler is also used to cool the reducer; the magnetic separator 12 separates the iron from the reduced material through the action of the magnetic field to achieve iron recovery.

[0043] As is understandable, ceramic zinc oxide, as an important chemical raw material, has extremely high requirements for environmental friendliness, resource utilization, and product quality during its production process. To meet these requirements, this embodiment provides a process for directly producing ceramic zinc oxide using a two-stage rotary kiln. This equipment features a simple structure, low energy consumption, and significant environmental benefits, providing a novel solution for the production of ceramic zinc oxide.

[0044] The process equipment primarily consists of a two-stage rotary kiln and a hot blast furnace 6. The two-stage rotary kiln is divided into a front-stage zinc oxide extraction kiln and a rear-stage iron recovery kiln. The front-stage zinc oxide extraction kiln primarily includes an extractor and a dust collector 8. The extractor extracts zinc oxide, while the dust collector 8 collects and treats dust and exhaust gases generated during the extraction process. This design effectively reduces the environmental impact of dust and exhaust gases, aligning with the concept of green production.

[0045] The rear iron recovery kiln primarily consists of a reducer, a cooler, and a magnetic separator 12. The reducer reduces the residue after zinc oxide extraction, recovering the iron from the residue. This step improves resource utilization and reduces iron waste. The cooler cools the reduced material and also cools the reducer. This design improves the equipment's service life and stability.

[0046] Magnetic separator 12 uses a magnetic field to separate the iron from the reduced material, enabling iron recovery. This process ensures product purity and reduces impurity content. The entire production process is carried out in a closed system, avoiding environmental pollution and waste of resources.

[0047] In summary, the process equipment provided by this embodiment for directly producing ceramic zinc oxide using a two-stage rotary kiln has the characteristics of being green, environmentally friendly, and highly efficient while ensuring product quality.

[0048] In some embodiments of the present application, the magnetic separator 12 adopts high gradient magnetic separation technology.

[0049] In some embodiments of the present application, the extractor includes a rotary cylinder 1, a feed port, a discharge port 5 and an extraction burner 2;

[0050] A screw propeller is provided inside the rotary cylinder 1 for pushing the raw materials forward inside the rotary cylinder 1; the feed port is provided at one end of the rotary cylinder 1 for adding the raw materials into the cylinder; the discharge port 5 is provided at the other end of the rotary cylinder 1 for discharging the residue after the zinc oxide is extracted; the hot blast furnace 6 is connected to the extraction burner 2 via a hot blast duct 7, and the hot blast generated by the hot blast furnace 6 is fed into the extraction burner 2 via the hot blast duct 7, and the extraction burner 2 then sprays the hot blast into the rotary cylinder 1 to perform a pyrolysis reaction on the raw materials to extract the zinc oxide;

[0051] The dust collector 8 is connected to the discharge port 5 of the extractor.

[0052] It is understood that this embodiment provides a device for extracting zinc oxide, which mainly includes a rotary cylinder 1, a feed port, a discharge port 5 and an extraction burner 2. The functions of each part and the operating principle of the entire device will be described in detail below.

[0053] The rotary drum 1 is the core of the equipment, housing a propeller. The propeller propels the raw materials forward within the drum, ensuring uniform processing. Made of high-quality materials, the drum 1 offers excellent heat and corrosion resistance, ensuring a long service life for the equipment.

[0054] Secondly, a feed port is located at one end of the rotating drum 1 for adding raw materials. The design of the feed port fully considers operational convenience, enabling quick and accurate addition of raw materials. Furthermore, the feed port is equipped with a sealing device to prevent raw materials from leaking during transportation, minimizing contamination.

[0055] At the other end, a discharge port 5 is provided for discharging the residue after zinc oxide extraction. The design of discharge port 5 also focuses on ease of operation, ensuring smooth discharge of waste residue. Discharge port 5 is connected to a dust collector 8 to further purify the emissions and reduce their impact on the environment.

[0056] The extraction burner 2 is a key component of the equipment. It uses hot air generated by the hot air furnace 6 to pyrolyze the raw material and extract zinc oxide. The hot air furnace 6 is connected to the extraction burner 2 via a hot air duct 7. The high-temperature hot air generated by the hot air furnace 6 is fed into the extraction burner 2 through the hot air duct 7. The extraction burner 2 then sprays the hot air into the rotating cylinder 1, causing the raw material to pyrolyze and extract zinc oxide.

[0057] Finally, the dust collector 8 is connected to the extractor outlet 5 to collect and process dust particles in the exhaust gas. The design of the dust collector 8 adopts advanced filtering technology, which effectively reduces dust emissions and protects the environment.

[0058] In summary, the zinc oxide extraction equipment proposed in this embodiment achieves efficient and environmentally friendly extraction of zinc oxide through the coordinated action of the rotating cylinder 1, the feed port, the discharge port 5 and the extraction burner 2.

[0059] In some embodiments of the present application, the inner wall of the rotating cylinder 1 is coated with a protective material; the protective material includes an inorganic coating, an organic polymer coating, and a ceramic material coating; wherein the inorganic coating is applied as the innermost layer of the inner wall of the rotating cylinder 1; the organic polymer coating is applied on top of the inorganic coating as an intermediate layer; and the ceramic material coating is applied on top of the organic polymer coating as the outermost layer;

[0060] The coating method of the protective material comprises:

[0061] preparing a sol containing an aluminum oxide precursor, and then forming an aluminum oxide coating, i.e., the inorganic coating, on the inner wall surface of the rotating cylinder 1 through a gelation reaction;

[0062] After mixing the epoxy resin and the curing agent, the mixture is applied to the surface of the inorganic coating by spraying, and then thermally cured to form the organic polymer coating;

[0063] The zirconium oxide powder is sprayed into a plasma flame and reacts with the surface of the organic polymer coating under high temperature conditions to form the ceramic material coating.

[0064] It is understandable that in order to optimize the service life and performance of the rotating drum 1, this embodiment also takes into account the versatility of the inner wall coating. In addition to the basic protective function, the coating is also designed to have certain wear resistance, corrosion resistance and self-cleaning properties. The inorganic coating not only enhances the hardness of the coating, but also gives it photocatalytic properties, which can decompose organic pollutants under light conditions, thereby achieving a self-cleaning effect. In terms of organic polymer coatings, in addition to epoxy resins, high-performance polymers such as polyimide and polytetrafluoroethylene can also be introduced. The introduction of these polymers not only improves the temperature resistance of the coating, but also enhances its resistance to chemical corrosion. In terms of ceramic material coatings, in addition to zirconium oxide, materials such as alumina ceramics and silicon nitride ceramics can also be considered. These ceramic materials have high hardness, high wear resistance and good thermal stability, which can effectively improve the service life of the rotating drum 1.

[0065] In this embodiment, a combination of air spraying and electrostatic spraying was used to spray the epoxy resin to improve coating uniformity and adhesion. Plasma spraying was used to form the ceramic coating, which can quickly form a dense ceramic coating at high temperatures and provides strong adhesion to the substrate.

[0066] In summary, the coating of this embodiment not only improves the service life and performance stability of the rotary drum 1, but also provides a more reliable guarantee for its application in harsh environments.

[0067] In some embodiments of the present application, the reducer includes a reduction cylinder 3, a reduction burner 4 and a reducing agent adding device. A spiral propeller is provided inside the reduction cylinder 3 for continuously pushing the residue after zinc oxide extraction forward in the cylinder and performing a reduction reaction; the reducing agent adding device is used to add a reducing agent into the reduction cylinder 3; the hot air furnace 6 is connected to the reduction burner 4 through a hot air pipe 7, and the hot air generated by the hot air furnace 6 is sent into the reduction burner 4 through the hot air pipe 7, and the reduction burner 4 then sprays the hot air into the reduction cylinder 3 to perform a reduction reaction on the residue after zinc oxide extraction and extract iron elements.

[0068] It can be understood that this embodiment proposes a reducer, which is mainly composed of three parts: a reduction cylinder 3, a reduction burner 4 and a reducing agent adding device.

[0069] First, the reduction cylinder 3 is the core of the device. It is equipped with a spiral propeller. The propeller's function is to continuously push the residue after zinc oxide extraction forward in the cylinder, and carry out the reduction reaction. In this way, the iron in the residue can be effectively extracted.

[0070] Secondly, the reducing agent adding device is responsible for adding reducing agent into the reduction cylinder 3. The design of this device fully considers the needs of chemical reaction to ensure that the reducing agent can fully contact with the residue and improve the efficiency of the reduction reaction.

[0071] Finally, the hot blast furnace 6 is connected to the reduction burner 4 via the hot blast duct 7. When the hot blast furnace 6 generates hot air, it is fed into the reduction burner 4 via the hot blast duct 7. The reduction burner 4 then sprays the hot air into the reduction cylinder 3, reducing the zinc oxide residue and extracting the iron.

[0072] In summary, this reducer achieves the extraction of iron from zinc oxide residue through rationally designed components and an efficient reduction reaction. This not only improves resource utilization but also contributes to environmental protection. Furthermore, the device offers advantages such as ease of operation and maintenance, making it highly practical.

[0073] In some embodiments of the present application, the cooler includes a cooling cylinder 9, a cooling water pipe 10 and an exhaust device 11; a screw propeller is provided inside the cooling cylinder 9 for continuously pushing the reduced material forward in the cylinder and cooling it; the cooling water pipe 10 surrounds the outside of the cooling cylinder 9 for providing cooling water to the cooling cylinder 9 to cool the reduced material.

[0074] It is understood that this embodiment provides an efficient cooler device. The cooler mainly consists of three parts, including a cooling cylinder 9, a cooling water pipe 10, and an exhaust device 11. These three parts will be described in detail below.

[0075] First, the cooling cylinder 9 is a crucial component of the present invention. It houses a screw propeller, a design that cleverly achieves continuous advancement and cooling of the material. Within the cooling cylinder 9, the reduced material is continuously moved forward by the propeller. This process effectively reduces the material's temperature, thereby ensuring its quality and performance.

[0076] Secondly, the cooling water pipe 10 is another key component. It surrounds the exterior of the cooling cylinder 9 and is responsible for supplying cooling water to the interior of the cooling cylinder 9. In actual operation, the cooling water flows through the pipe, removing heat and ensuring that the material inside the cooling cylinder 9 is fully cooled. This design not only ensures effective cooling of the material, but also improves cooling efficiency.

[0077] Finally, exhaust device 11 serves to discharge waste gases. During the cooling process, waste gases generated by the material are discharged through exhaust device 11, preventing waste gases from stagnating inside the equipment and ensuring a clean environment within the equipment. Furthermore, the design of exhaust device 11 helps improve the ventilation of the cooler, further optimizing the cooling process.

[0078] In summary, the cooler device proposed in this application has the advantages of compact structure, good cooling effect, and high efficiency. Through the synergistic effect of the cooling cylinder 9, the cooling water pipe 10 and the exhaust device 11, the material is cooled quickly and evenly, providing a practical solution for related industries.

[0079] In some embodiments of the present application, the connection relationship between the reduction cylinder 3, the cooling cylinder 9 and the magnetic separator 12 is linear series; the reduced material coming out of the reduction cylinder 3 first enters the cooling cylinder 9 for cooling, and then the cooled material is sent to the magnetic separator 12 through the transmission device;

[0080] The exhaust device 11 is provided at the connection between the cooling cylinder 9 and the reducer. The exhaust device 11 is used to discharge the waste gas generated during the cooling process. At the same time, the exhaust device is also used to cool the reducer.

[0081] It will be appreciated that this embodiment discusses the connection relationship between the reduction cylinder 3, the cooling cylinder 9, and the magnetic separator 12. A typical connection method is linear series connection. Specifically, the reduction cylinder 3, the cooling cylinder 9, and the magnetic separator 12 are connected in sequence to form a continuous workflow.

[0082] During operation, after exiting reduction drum 3, the material first enters cooling drum 9. Here, cooling drum 9 rapidly reduces the material temperature, ensuring that subsequent process steps are not affected by high temperatures. The cooled material is then conveyed via a conveyor to magnetic separator 12 for further processing.

[0083] In addition, this application also proposes a design for an exhaust device 11. This device is located at the connection between the cooling cylinder 9 and the reducer and is primarily used to discharge exhaust gas generated during the cooling process. At the same time, the exhaust device 11 also has the function of cooling the reducer, ensuring the stability and safety of equipment operation. In this way, efficient material processing and resource utilization can be achieved, reducing energy consumption and environmental pollution. This connection relationship not only improves production efficiency, but also helps save equipment and site space.

[0084] In some embodiments of the present application, the reduction cylinder 3 includes an inner layer of the reduction cylinder 3, a middle layer of the reduction cylinder 3 and an outer layer of the reduction cylinder 3, wherein the inner layer of the reduction cylinder 3 is made of corrosion-resistant and wear-resistant material, the middle layer of the reduction cylinder 3 is made of heat-resistant material, and the outer layer of the reduction cylinder 3 is made of thermal insulation material.

[0085] It is understood that this embodiment provides a three-layered reduction cylinder 3. This reduction cylinder 3 is innovative in design and manufacturing, and comprises an inner layer, a middle layer, and an outer layer. Each layer has its own specific function and material selection to meet different working requirements.

[0086] First, the inner layer of the reduction cylinder 3 is made of a corrosion-resistant and wear-resistant material. This layer primarily protects the reduction cylinder 3 from chemical corrosion and wear. In high-temperature and high-pressure industrial environments, this material effectively extends the service life of the reduction cylinder 3, ensuring its stability and efficiency.

[0087] Secondly, the middle layer of the reduction cylinder 3 is constructed with a thermal resistance material. This layer's primary function is to insulate and reduce heat loss. During the high-temperature reduction process, the thermal resistance material effectively reduces heat transfer to the surrounding environment, thereby improving reduction efficiency and reducing energy consumption. Furthermore, the thermal resistance material reduces temperature gradients within the cylinder, preventing equipment damage caused by excessive temperatures.

[0088] Finally, the outer layer of the reduction cylinder 3 is coated with a thermal insulation material. This layer's primary function is to maintain a stable temperature within the reduction cylinder 3 and prevent the external environment from affecting the reduction process. The thermal insulation material has excellent thermal insulation properties, effectively preventing interference from hot and cold gases, steam, and other factors on the contents within the cylinder, thereby ensuring the purity of the reduction process and ensuring product quality.

[0089] In summary, the three-layer reduction cylinder 3 fully considers the requirements of the industrial reduction process in terms of material and structural design, achieving the goals of high efficiency, energy saving, and environmental protection. It not only improves reduction efficiency and reduces production costs, but also makes a positive contribution to environmental protection.

[0090] In some embodiments of the present application, the front-stage zinc oxide extraction kiln and the rear-stage iron recovery kiln are connected by a connecting assembly, and the connecting assembly is used to transfer the residue after zinc oxide extraction from the front-stage zinc oxide extraction kiln to the rear-stage iron recovery kiln;

[0091] The connecting assembly includes a transmission pipe and a residue transfer device; one end of the transmission pipe is connected to the discharge port 5 of the front-stage zinc oxide extraction kiln, and the other end is connected to the feed port of the rear-stage iron recovery kiln, and is used to transfer the residue after zinc oxide extraction from the front-stage zinc oxide extraction kiln to the rear-stage iron recovery kiln; the residue transfer device is arranged at the connection of the transmission pipe, and is used to control the flow speed and flow of the residue to ensure that the residue can smoothly and evenly enter the rear-stage iron recovery kiln.

[0092] As you can understand, this embodiment proposes a method for connecting a front-end zinc oxide extraction kiln and a back-end iron recovery kiln. This connection is achieved through a connecting assembly, the primary function of which is to transfer the zinc oxide extraction residue from the front-end zinc oxide extraction kiln to the back-end iron recovery kiln. This not only improves production efficiency but also effectively reduces environmental pollution.

[0093] The connecting assembly primarily consists of a transfer pipe and a residue transfer device. The transfer pipe serves as a bridge between the front-end zinc oxide extraction kiln and the rear-end iron recovery kiln, responsible for transporting the residue. One end of the transfer pipe is connected to the discharge port 5 of the front-end zinc oxide extraction kiln, and the other end is connected to the feed port of the rear-end iron recovery kiln. This allows the residue from zinc oxide extraction to be smoothly transferred from the front-end zinc oxide extraction kiln to the rear-end iron recovery kiln.

[0094] The slag transfer device plays a key role in this process. Located at the connection point of the transfer pipeline, it primarily controls the flow rate and volume of the slag. This ensures smooth and even flow of the slag into the downstream iron recovery kiln. This not only ensures efficient recovery but also reduces equipment wear and extends its service life.

[0095] In short, the design of this connection component makes the zinc oxide extraction and iron recovery process more efficient and environmentally friendly.

[0096] In some embodiments of the present application, the residue transfer device includes a rotary valve and a regulator; the rotary valve is arranged at the connection of the transmission pipeline and controls the flow of the residue through a rotational action; the regulator is connected to the rotary valve and is used to adjust the rotation speed of the rotary valve and the flow rate of the residue.

[0097] It is understood that this embodiment provides a residue transfer device, the main components of which include a rotary valve and a regulator. The design concept of this device is to achieve precise control and efficient treatment of residues.

[0098] First, the rotary valve, as the core component of the device, is of undeniable importance. It is cleverly positioned at the connection point of the transfer pipeline, allowing the flow of residue to be controlled through its rotation. This design ensures orderly transfer of residue, avoiding confusion and blockages and improving processing efficiency. Next, the regulator is closely connected to the rotary valve. Its primary function is to regulate the valve's rotational speed and the flow rate of residue. By precisely controlling the valve's rotational speed, the appropriate flow rate of residue is maintained during transfer, resulting in a more stable and efficient process. Furthermore, the regulator can adjust the residue flow rate based on actual needs, allowing the device to adapt to various working environments and tasks.

[0099] In summary, this residue transfer device achieves efficient residue treatment through the synergistic effect of a rotary valve and a regulator. The rotary valve ensures orderly flow of residue during transfer, while the regulator ensures stability and adaptability of the treatment process. This not only improves treatment efficiency but also reduces environmental pollution.

[0100] In some embodiments of the present application, the process equipment further comprises an automated control system;

[0101] The automated control system is used to monitor the operating status of the process equipment in real time and to automatically adjust and control it according to the set process parameters; at the same time, the automated control system is also used to achieve remote monitoring and fault diagnosis.

[0102] It is understood that this embodiment introduces a process equipment that not only has excellent performance but is also equipped with an advanced automated control system. This automated control system has multiple functions and provides comprehensive protection for the operation of the process equipment.

[0103] First, the automated control system can monitor the operating status of process equipment in real time. This means that the system can always understand the equipment's operating status, providing a strong guarantee for its healthy operation. Through real-time monitoring, the system can promptly identify potential equipment anomalies, allowing proactive measures to prevent equipment failures.

[0104] Secondly, the automated control system automatically adjusts and controls the equipment according to the set process parameters. This approach ensures process stability and consistency, avoiding fluctuations in production caused by human error or negligence. Based on the set process parameters, the automated control system precisely adjusts the equipment according to actual conditions, ensuring that the production process is carried out under optimal conditions.

[0105] Furthermore, the automated control system features remote monitoring and fault diagnosis. This means that even outside the production site, equipment can be monitored and diagnosed in real time. If a potential equipment failure is detected or if actual operating parameters deviate significantly from set values, the system immediately issues an alarm, prompting personnel to take appropriate action. This significantly reduces the risk of equipment failure and improves production efficiency.

[0106] Preferably, the automated control system is used to monitor the operating status of the process equipment in real time and automatically adjust and control according to the set process parameters, specifically including:

[0107] Collect real-time operating data of process equipment through sensors and instruments, including key parameters such as temperature, pressure, flow, and liquid level;

[0108] Transmit these data to the automated control system for analysis and processing;

[0109] The automated control system compares and judges the collected data based on preset process parameters and algorithms to determine whether adjustment and control are needed;

[0110] If necessary, the automated control system will send instructions to actuators, such as valves, motors, pumps, etc., to adjust the operating status of the equipment to meet the set process parameters;

[0111] The automated control system continuously monitors the operating status of the equipment and makes fine adjustments as needed to maintain stable equipment operation and consistent product quality.

[0112] At the same time, the automation control system is also used to realize remote monitoring and fault diagnosis, specifically including:

[0113] Transmitting the operating data of process equipment to the remote monitoring center via the Internet or local area network;

[0114] The remote monitoring center can analyze and process data in real time to understand the operating status and production status of the equipment;

[0115] If any abnormality or failure is detected, the remote monitoring center will issue an alarm and notify relevant personnel to handle it;

[0116] Relevant personnel can diagnose and repair equipment faults through the remote monitoring center, improving equipment maintenance efficiency and service life;

[0117] The remote monitoring center can also record and analyze the equipment's operating data, providing data support for production management and decision-making.

[0118] In summary, the introduction of this automated control system makes the operation of process equipment more intelligent, efficient, and reliable. It not only improves production efficiency and reduces labor costs, but also enhances product quality and equipment lifespan. Furthermore, the implementation of remote monitoring and fault diagnosis capabilities makes equipment maintenance and management more convenient and efficient. In short, the automated control system equipped with this process equipment offers multiple functions, including real-time monitoring, automatic adjustment, remote monitoring, and fault diagnosis, providing strong support for stable equipment operation and efficient production.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln, characterized in that: The process equipment includes a two-stage rotary kiln and a hot blast furnace; The hot blast furnace is used to provide heated air to the two-stage rotary kiln; The two-stage rotary kiln includes a front-stage zinc oxide extraction kiln and a rear-stage iron recovery kiln; The front-stage zinc oxide extraction kiln includes an extractor and a dust collector; wherein the extractor is used to extract zinc oxide; the dust collector is used to collect and process dust and waste gas generated during the extraction process; The rear iron recovery kiln includes a reducer, a cooler, and a magnetic separator; the reducer is used to reduce the residue after zinc oxide extraction to reduce the iron element from the residue; the cooler is used to cool the reduced material and at the same time cool the reducer; the magnetic separator separates the iron from the reduced material through the action of a magnetic field to achieve iron recovery; The extractor includes a rotary cylinder, a feed port, a discharge port and an extraction burner; a screw propeller is provided inside the rotary cylinder for pushing the raw materials forward in the rotary cylinder; the feed port is provided at one end of the rotary cylinder for adding the raw materials into the cylinder; the discharge port is provided at the other end of the rotary cylinder for discharging the residue after the zinc oxide is extracted; the hot blast furnace is connected to the extraction burner through a hot blast duct, and the hot blast generated by the hot blast furnace is sent to the extraction burner through the hot blast duct, and the extraction burner then sprays the hot blast into the rotary cylinder to perform a pyrolysis reaction on the raw materials and extract the zinc oxide; the dust collector is connected to the discharge port of the extractor; The inner wall of the rotating cylinder is coated with a protective material; the protective material includes an inorganic coating, an organic polymer coating and a ceramic material coating; wherein the inorganic coating is coated as the innermost layer of the inner wall of the rotating cylinder; the organic polymer coating is coated on top of the inorganic coating as an intermediate layer; and the ceramic material coating is coated on top of the organic polymer coating as an outermost layer; the coating method of the protective material comprises: preparing a sol containing an aluminum oxide precursor, and then forming an aluminum oxide coating, i.e., the inorganic coating, on the inner wall surface of the rotating cylinder through a gelation reaction; mixing an epoxy resin with a curing agent, coating the mixture on the surface of the inorganic coating by spraying, and then thermally curing to form the organic polymer coating; spraying zirconium oxide powder into a plasma flame, and reacting with the surface of the organic polymer coating under high temperature conditions to form the ceramic material coating; The reducer includes a reduction cylinder, a reduction burner and a reducing agent adding device. A spiral propeller is provided inside the reduction cylinder for continuously pushing the residue after zinc oxide extraction forward in the cylinder and performing a reduction reaction; the reducing agent adding device is used to add a reducing agent into the reduction cylinder; the hot blast furnace is connected to the reduction burner through a hot blast pipe, and the hot blast generated by the hot blast furnace is sent to the reduction burner through the hot blast pipe. The reduction burner then sprays the hot blast into the reduction cylinder to perform a reduction reaction on the residue after zinc oxide extraction and extract iron.

2. The process equipment for directly producing ceramic zinc oxide by a two-stage rotary kiln according to claim 1, characterized in that: The cooler includes a cooling cylinder, a cooling water pipe and an exhaust device; a screw propeller is provided inside the cooling cylinder to continuously push the reduced material forward in the cylinder and cool it; the cooling water pipe surrounds the outside of the cooling cylinder to provide cooling water into the cooling cylinder to cool the reduced material.

3. The process equipment for directly producing ceramic zinc oxide by a two-stage rotary kiln according to claim 2, characterized in that: The connection relationship between the reduction cylinder, the cooling cylinder and the magnetic separator is linear series; the reduced material coming out of the reduction cylinder first enters the cooling cylinder for cooling, and then the cooled material is sent to the magnetic separator through the transmission device; The exhaust device is arranged at the connection between the cooling cylinder and the reducer. The exhaust device is used to discharge the waste gas generated during the cooling process. At the same time, the exhaust device is also used to cool the reducer.

4. The process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln according to claim 1, characterized in that: The reduction cylinder comprises an inner layer, a middle layer and an outer layer, wherein the inner layer is made of corrosion-resistant and wear-resistant material, the middle layer is made of heat-resistant material, and the outer layer is made of heat-insulating material.

5. The process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln according to claim 1, characterized in that: The front-stage zinc oxide extraction kiln and the rear-stage iron recovery kiln are connected by a connecting assembly, and the connecting assembly is used to transfer the residue after zinc oxide extraction from the front-stage zinc oxide extraction kiln to the rear-stage iron recovery kiln; The connecting assembly includes a transmission pipe and a residue transfer device; one end of the transmission pipe is connected to the discharge port of the front-stage zinc oxide extraction kiln, and the other end is connected to the feed port of the rear-stage iron recovery kiln, and is used to transfer the residue after zinc oxide extraction from the front-stage zinc oxide extraction kiln to the rear-stage iron recovery kiln; the residue transfer device is arranged at the connection of the transmission pipe, and is used to control the flow speed and flow of the residue to ensure that the residue can smoothly and evenly enter the rear-stage iron recovery kiln.

6. The process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln according to claim 5, characterized in that: The residue transfer device includes a rotary valve and a regulator; the rotary valve is arranged at the connection of the transmission pipeline and controls the flow of the residue through a rotating action; the regulator is connected to the rotary valve and is used to adjust the rotation speed of the rotary valve and the flow rate of the residue.

7. The process equipment for directly producing ceramic zinc oxide using a two-stage rotary kiln according to claim 1, characterized in that: The process equipment also includes an automated control system; The automated control system is used to monitor the operating status of the process equipment in real time and to automatically adjust and control it according to the set process parameters; at the same time, the automated control system is also used to achieve remote monitoring and fault diagnosis.

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