CN115198041A - Particle size control system and method for centrifugal granulation and pulverization of rotary table and application - Google Patents

Particle size control system and method for centrifugal granulation and pulverization of rotary table and application Download PDF

Info

Publication number
CN115198041A
CN115198041A CN202210806057.5A CN202210806057A CN115198041A CN 115198041 A CN115198041 A CN 115198041A CN 202210806057 A CN202210806057 A CN 202210806057A CN 115198041 A CN115198041 A CN 115198041A
Authority
CN
China
Prior art keywords
slag
turntable
temperature
granulating
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210806057.5A
Other languages
Chinese (zh)
Other versions
CN115198041B (en
Inventor
李龙
彭磊
赵伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Mechanics of CAS
Original Assignee
Institute of Mechanics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Mechanics of CAS filed Critical Institute of Mechanics of CAS
Priority to CN202210806057.5A priority Critical patent/CN115198041B/en
Publication of CN115198041A publication Critical patent/CN115198041A/en
Application granted granted Critical
Publication of CN115198041B publication Critical patent/CN115198041B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/052—Apparatus features including rotating parts
    • C21B2400/054—Disc-shaped or conical parts for cooling, dispersing or atomising of molten slag rotating along vertical axis
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)

Abstract

The invention discloses a rotary disc centrifugal granulating device, which is characterized by comprising the following components: the heat preservation device is used for preserving the heat of the high-temperature furnace slag; the rotary table device is used for atomizing the slag flowing out of the heat preservation device into slag droplets; the eccentric control device is used for controlling the eccentric flow of the slag into the turntable device; a cooling device for reducing the temperature of the slag powder; and the collecting device is used for collecting the slag powder. The invention aims to provide a method for regulating and controlling the particle size distribution of powder and reducing the median diameter of the powder in centrifugal granulation, so that the powder with a smaller particle size can be prepared in a larger proportion.

Description

Particle size control system and method for centrifugal granulation and pulverization of rotary table and application
Technical Field
The invention relates to a particle size control method for centrifugal granulating and milling of a rotary table, which adopts inflow eccentricity to regulate and control the distribution of a liquid film on the upper surface of the rotary table so as to influence the particle size of granulated powder and relates to the field of metal granulating and milling.
Background
With the increasing awareness of people on the problems of energy shortage and environmental pollution, energy conservation and emission reduction become an urgent task. The steel manufacturing industry is one of the most energy-consuming industries in the world, high-temperature slag is generated in the steel smelting process, about 300kg of slag is produced in one ton of steel produced by steel enterprises at present, and the yield of the slag accounts for 50% of the steel production waste. The temperature range of the blast furnace slag during discharge is up to 1450 ℃, the heat energy is about 1770MJ/t, and if the blast furnace slag is directly discharged into the environment, huge energy waste and environmental pollution are caused. The traditional blast furnace slag water quenching process not only consumes a large amount of water resources, but also releases toxic and harmful gases to the atmosphere, and the heat of high-temperature molten slag cannot be effectively utilized. The dry granulation utilization of the blast furnace slag can be developed, so that the problems can be well relieved, the energy consumption can be reduced, and the method has important significance for realizing economic sustainable development.
Since the 70 s of the last century, studies on dry granulation and heat recovery of blast furnace slag have been made in various countries around the world, and methods such as a wind quenching method, a drum method, a mechanical stirring method and a centrifugal granulation method have been proposed and developed. The air quenching method is to use high-speed high-pressure airflow to impact liquid slag to break the liquid slag into liquid drops and carry out strong heat exchange, but the method needs to consume a large amount of high-pressure gas, so that the energy consumption of a fan is huge, and the grade of recovered waste heat is not high. The roller method is to pour liquid slag on the surface of a rotary roller, and the slag is extended and crushed and then enters a waste heat recovery device for heat exchange. But the technology generates larger slag blocks, greatly reduces the operation stability of the system and ensures the slag quality difficultly. The mechanical stirring method is to utilize helical blades to stir and extrude the molten slag, and the molten slag exchanges heat with the rotating shaft of the blades and the sleeve outside the blades, but the particle size obtained by the process is large, the cooling capacity of the molten slag is not enough, and the recovery rate of waste heat is lower than 50%. The centrifugal granulation method is proposed by YOSHINAGA et al in 1982, and the basic principle is that liquid slag is granulated into small droplets under the action of centrifugal force by using a rotating disc or a rotating cup which rotates at high speed, and the small droplets are directly or indirectly subjected to high-efficiency heat exchange with air to be rapidly solidified into slag powder.
The turntable centrifugal granulation can theoretically obtain small-particle-size powder with high glass phase content, and the powder is an excellent raw material of cement, and the waste heat recovery rate of the slag is over 90 percent. Centrifugal granulation is therefore considered to be the most promising dry treatment method for blast furnace slag. The small-particle-size slag powder can improve the waste heat recovery rate and increase the content of a glass phase, but the rotating disc centrifugal granulation cannot meet the high rotating speed condition required by preparing the small-particle-size powder due to the fact that the rotating disc is unbalanced.
The invention aims at providing a method for regulating and controlling the particle size distribution of powder and reducing the median diameter of the powder in centrifugal granulation, and the method can prepare small-particle-size powder with a larger proportion.
Disclosure of Invention
The invention aims to disclose a particle size control system method for rotary disc centrifugal granulation powder making and application.
The invention aims to realize the following technical scheme:
a rotary disk centrifugal granulation apparatus, said apparatus comprising:
the heat preservation device is used for preserving the heat of the high-temperature furnace slag;
the rotary table device is used for atomizing the slag flowing out of the heat preservation device into slag droplets;
the eccentric control device is used for controlling the eccentric flow of the slag into the turntable device;
a cooling device for reducing the temperature of the slag powder;
and the collecting device is used for collecting the slag powder.
Furthermore, the eccentric control device guides the slag liquid in the high-temperature slag liquid collector to an inlet boundary on the granulating rotary table, and eccentric inflow is realized by controlling the diameter of the inlet boundary, the height distance between the inlet boundary and the upper surface of the rotary table and the eccentric distance of the central position.
Further, the heat preservation device comprises a high-temperature slag heat preservation device (1), a crucible (2) and a valve (4), wherein the crucible (2) is positioned in the heat preservation device, and the valve (4) is arranged below the crucible (2); the crucible (2) is positioned above the turntable (8), a gap is reserved between the crucible and the turntable, and the crucible (2) is arranged in the high-temperature slag heat preservation device (1); the crucible (2) is not connected with the turntable (8), the crucible is suspended and positioned right above the turntable (8), and high-temperature metal liquid in the crucible flows down onto the turntable (8) through a central hole;
the turntable device comprises a turntable (8), a rotating shaft (9), a coupler (10), a high-speed motor (11) and a motor supporting platform (13), wherein one end of the turntable shaft (9) is connected with the turntable (8), and the other end of the turntable shaft is connected with the coupler (10); the disc shaft (9) and the turntable (8) keep coaxial, and the coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the turntable (8) and the disc shaft (9) to rotate; the high-speed motor (11) generates power to drive the turntable (8) and the turntable shaft (9) to rotate, and the motor supporting platform (13) is fixed on the inner wall of the granulating chamber (22); the motor supporting platform (13) is a rectangular flat plate which is made of metal or high-strength non-metallic substances and is provided with supporting legs, and the supporting legs are welded on the inner wall of the granulating chamber (22) to provide an adjustable space position for the high-speed motor;
the eccentric control device comprises a motor positioning pulley (12), a driver (25) and an electric push rod (23), wherein the driver (25) can control the electric push rod (23) to move according to a set distance, the electric push rod (23) is connected with the motor positioning pulley, and the upper part of the positioning pulley (12) is fixed with a high-speed motor; the motor positioning pulley (12) consists of N universal wheels (N is more than or equal to 1), is provided with a fixing device and is used for adjusting the position of the motor in the horizontal direction, so that the eccentric distance between the slag liquid flow (5) and the rotating disc (8) is controlled, the distribution of the slag liquid film on the rotating disc (8) is influenced, and the aim of adjusting the particle size distribution of the granulated powder is finally achieved.
The cooling device comprises a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying the cooled circulating water flow (21) to the position between the wall surfaces of the granulating chamber; the high-temperature circulating water flow (17) flows out from a cooling channel in the middle of the double-layer wall surface of the granulating chamber and is mainly used for transferring heat absorbed by the wall surface of the granulating chamber to the waste heat boiler (20) so as to recycle the wall surface heat.
The water pump (18) is used for providing power for the wall surface cooling circulating water flow, and the water flow can smoothly flow in the wall surface of the granulating chamber and the circulating water flow pipeline (19).
The circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying the cooled circulating water flow (21) into the cooling channel between the wall surfaces of the granulating chambers to absorb the heat on the wall surfaces of the granulating chambers.
The waste heat boiler (20) is used for cooling circulating water flow between the wall surfaces of the granulating chambers, absorbing heat of high-temperature water flow (17) discharged from the wall surfaces of the granulating chambers, and is a main energy conversion device for recovering heat.
And the low-temperature circulating water flow (21) is discharged after being cooled by the waste heat boiler, enters the double-layer wall of the granulating chamber again, absorbs the heat of the wall surface and reduces the temperature of the wall surface.
The collecting system comprises a granulating chamber (22), a flange (16) and an elbow (15), wherein the elbow (15) is connected below the granulating chamber, and the pipeline interface flange (16) is positioned at the tail end of the elbow (15). The elbow (15) is connected below the granulating chamber and is used for leading out the granulated particles. The elbow can adopt a 90-degree elbow and can also be designed into a required angle according to the position of downstream equipment. The pipeline interface flange (16) is positioned at the tail end of the elbow (15) and is used for connecting a downstream particle size classifier or a collecting tank. If continuous granulating recovery is carried out, the combination of the granulating chamber and a downstream classifier can realize on-line classification, and the production efficiency is improved. If continuous granulation is not needed, a granulated powder collecting tank can be directly connected to the pipeline interface flange (20), and subsequent particle size classification and packaging transportation can be carried out after the powder collection is finished.
Furthermore, the number of the motor positioning pulleys (12) is more than or equal to 1, and the set distance is 1-10mm; the turntable (8) and the crucible outlet are coaxially aligned; the crucible (2) and the high-temperature slag heat preservation device (1) are connected through a bolt or a flange, or are seated on the bottom surface of the heat preservation device (1), and the bottom surface of the heat preservation device (1) is provided with a hole.
Furthermore, the granulation chamber (22) is also provided with granulation chamber supporting legs (14) which are firmly installed with the ground through connecting and fixing pieces, and the connecting and fixing pieces comprise foundation bolts so as to ensure that the position of the granulation chamber is not changed in the working process; the high-temperature slag heat preservation device (1) is of a metal structure with a heat preservation effect; the device mainly aims at preserving heat of high-temperature slag discharged in the steel smelting process and preventing heat from seriously dissipating, and on one hand, the device is used for improving heat recovery efficiency; on the other hand, the method is used for keeping the superheat degree of the slag to be high and preventing the solidification caused by too low temperature from blocking a valve. The crucible (2) is made of a temperature-resistant material; the valve (4) is made of high-temperature resistant material; the turntable (8) is a thin cylinder with the diameter range of 30-200mm and the thickness of 0.5-10mm, is made of a hard material capable of resisting high temperature, and has the temperature of over 600 ℃; the edge circle run-out error of the turntable (8) is less than or equal to 0.02mm; the coaxiality of the disc shaft (9) and the turntable (8) is kept, and the error is less than or equal to 0.01mm; the rotating speed of the high-speed motor (11) is more than or equal to 2000rpm.
The high-temperature slag liquid flow (5) is formed by the way that the high-temperature slag liquid (3) flows out through a valve (4) after being subjected to heat preservation in the crucible (2). The high-temperature slag liquid film (6) is formed by spreading the slag liquid flow (5) on the disc surface of the rotary disc. The granulated slag liquid drops (7) are formed by tearing and breaking the liquid film (6) at the edge of the rotary table due to the action of centrifugal force generated by high-speed rotation of the rotary table.
The disc shaft (9) can be integrally processed with the disc (8) or processed independently and then welded or bonded with the disc (8), the diameter and the length of the disc shaft (9) are designed and processed according to the requirements of mounting parts (such as a coupler), and the disc shaft (9) and the disc (8) are required to keep coaxiality in order to ensure dynamic balance precision.
The coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the turntable (8) and the disc shaft (9) to rotate at a high speed.
The high-speed motor (11) is used for generating power to drive the turntable (8) and the disc shaft (9) to rotate at a high speed, and the rotating speed is required to be more than 2000rpm. In order to adjust the rotating speed, the high-speed motor (11) is driven by a frequency converter, water is filled in the motor for cooling, and good lubrication is guaranteed. A high-temperature-resistant heat insulation layer wraps the periphery of the motor, and heat protection with a better effect can be realized.
Further, the shape of the granulating chamber (22) is a structure of a section of cylinder and a section of cone; the granulating chamber (22) is a container for centrifugal granulating process, and the material comprises carbon steel or stainless steel; the wall surface of the atomizing part of the granulating chamber is of a double-layer structure, and a cooling channel is processed inside the granulating chamber; the crucible (2) is made of stainless steel, graphite and ceramic; the bottom of the crucible is provided with a contraction opening; the material of the valve (4) comprises graphite and ceramic; the high-speed motor (11) is driven by a frequency converter, and water is introduced into the motor for cooling; a high-temperature-resistant heat insulation layer wraps the periphery of the motor; the diameter of the granulating chamber is larger than the track length of solidified granulated liquid drops.
Too small a diameter will result in droplets adhering to the inner wall of the granulation chamber. The lower part of the granulating chamber is conical and is used for collecting solidified slag particles. The wall surface of the atomizing chamber is of a double-layer structure, and a cooling channel is processed in the atomizing chamber and used for cooling water to flow and take away heat transferred in the high-temperature slag granulation process.
A method of using a rotating disk centrifugal granulating apparatus, using the apparatus described above, the method steps comprising:
preserving the high-temperature furnace slag by using a heat preservation device; controlling the slag to eccentrically flow into the turntable device by using an eccentric control device, and atomizing the slag flowing out of the heat preservation device into slag droplets by using the turntable device; reducing the temperature of the slag powder using a cooling device; the slag powder was collected using a collection device.
Further, a high-speed motor (11) is started to rotate at a high speed, the rotating disc (8) is driven to rotate at a high speed through a coupler (10) and a rotating shaft (9), high-temperature slag liquid (3) which is melted into a liquid state in the crucible (2) passes through a valve (4) to form a vertically downward high-temperature slag liquid flow (5) and flows onto the rotating disc (8) which rotates at the high speed right below, the liquid flow forms a high-temperature slag liquid film (6) on the upper surface of the rotating disc (8), and the liquid flow is thrown out at a high speed after reaching the edge to form granulated slag liquid drops (7); at the initial moment, the turntable (8) and the high-temperature slag liquid flow (5) are coaxially aligned, in order to realize the eccentric granulation process, the required eccentric amount M is input through the driver (25), the driver (25) commands the electric push rod (23) to move according to the set distance through a signal cable, the electric push rod (23) is connected with the motor positioning pulley, and then the motor positioning pulley (12) moves for the distance M on the left and right of the horizontal plane; the upper part of the positioning pulley (12) is fixed with a high-speed motor, the high-speed motor (11) and a disc shaft (9) on the positioning pulley are driven, and the turntable (8) is further driven to move left and right in the horizontal plane M, so that the center of the turntable (8) and the center of the high-temperature slag liquid flow (5) deviate from M, and the M eccentricity is generated after the liquid flow (5) flows to the upper surface of the turntable (8); starting a cooling device, a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying the cooled circulating water flow (21) to the wall surface of the granulating chamber; opening a flange of the collecting system, and collecting the powder.
Further, M is 1-10mm.
The rotary disc centrifugal granulating device is used for reducing the particle size of powder.
Fig. 7 is a schematic diagram showing a comparison between the centrifugal granulation of the conventional central inflow rotary table and the centrifugal granulation of the eccentric inflow rotary table according to the present invention, in which 1 is a high-temperature slag liquid stream inlet, 2 is a rotating disc, and 3 is an air granulation environment for two granulation modes.
The high-temperature slag liquid flow inlet 1 is used for guiding slag liquid in the high-temperature slag liquid collector to an inlet boundary on the granulating rotary table, and the diameter of the inlet boundary can be expanded and contracted, and the position of the rotary table is moved in the horizontal direction so as to regulate and control inflow eccentric distance to influence the slag granulating effect.
The rotating disc 2 is used for providing centrifugal force required by granulating the metal liquid film on the surface of the rotating disc, and the centrifugal force overcomes the surface tension and viscous force of the slag liquid at the edge of the rotating disc to break the liquid film into liquid drops.
The air granulation environment 3 is a container environment in the centrifugal granulation powder making process, and the broken high-temperature slag liquid drops can be rapidly solidified into slag particles with high glass phase content in the flying process in the air, so that the heat recovery effect is achieved.
The average particle diameter d50 of the granulated slag droplets (7) produced by the high-speed rotation is reduced by 0.01 to 0.2mm.
If the eccentricity is less than 1mm, the effect of reducing the average particle diameter d50 is very weak (usually less than 0.001 mm), and is substantially negligible; if the eccentricity is more than 10mm, the liquid film (6) on the surface of the rotating disc (8) has large unbalance, the dynamic balance of the rotating disc is reduced greatly, the vibration is serious, the vibration frequency is more than 30Hz, the amplitude is more than 1mm, and the rotating disc is easy to generate fatigue damage due to high-frequency vibration.
FIG. 1 shows a conventional central inflow rotating disk centrifugal granulation and the present invention
The proposed eccentric inflow turntable centrifugal granulation comparison schematic diagram is shown in the figure, wherein 1 is a high-temperature slag liquid flow inlet of two granulation modes, 2 is a rotating disc, and 3 is an air granulation environment.
The high-temperature slag liquid stream inlet 1 is an inlet boundary for guiding slag liquid in the high-temperature slag liquid collector to the granulating rotary table, and the slag granulating effect can be influenced by controlling the diameter of the inlet boundary, the height distance from the upper surface of the rotary table and the eccentric distance of the central position.
The rotating disc 2 is used for providing centrifugal force required by granulating the metal liquid film on the surface of the rotating disc, and the centrifugal force overcomes the surface tension and viscous force of slag liquid at the edge of the rotating disc to break the liquid film into liquid drops.
The air granulation environment 3 is a container environment in the centrifugal granulation powder making process, and broken high-temperature slag droplets can be rapidly solidified into slag with high glass phase content in the flying process in the air.
The invention aims at providing a method for regulating and controlling the particle size distribution of powder and reducing the median diameter of the powder in centrifugal granulation, and the method can prepare small-particle-size powder with a larger proportion. The invention provides a method for reducing the median diameter of rotary disc centrifugal granulating powder, which can be effectively applied to the field of centrifugal granulating powder making of high-temperature slag liquid. By adopting an inflow eccentricity method, the liquid film is not uniformly spread after the liquid column flows to the upper surface of the rotary table, the large eccentricity can cause the excessive concentration of the liquid film, a large-area thin liquid film area appears, and the particle size of the liquid drops granulated at the edge of the rotary table is reduced, so that the ratio of small particle size to small particle size in the granulated powder is improved, and the median diameter of the granulated powder is reduced.
The working principle of the invention is that the eccentricity of a slag liquid flow inlet is actively manufactured, so that liquid films are unevenly distributed when slag liquid flows on the upper surface of a turntable, the liquid films in a large area of the turntable are thinned by gathering a large amount of liquid flows at a certain point, and a large amount of small-grain-size slag particles are obtained by granulation, thereby achieving the purpose of reducing the median diameter.
Description of the drawings:
FIG. 1 is an eccentric granulation model;
FIG. 2 mesh partitioning: (a) a monolithic grid, (b) a cross-sectional grid;
FIG. 3: calculating atomization diagrams under 4 eccentricities;
FIG. 4: particle size distribution under different eccentricity;
FIG. 5 is a schematic view of: a median particle size comparison graph under different eccentricities;
FIG. 6: schematic diagram of a high-temperature slag granulation heat recovery device: wherein, 1: a high-temperature slag heat preservation device; 2: a crucible; 3: high temperature slag liquid; 4, a valve; 5: a high temperature slag stream; 6: a high temperature slag liquid film; 7: granulating slag droplets; 8: a rotary table surface; 9: a rotating shaft; 10: a coupling; 11: a high-speed motor; 12: a motor positioning pulley; 13: a motor support platform; 14: a granulation chamber support leg; 15 bends; 16: a pipe interface flange; 17: high temperature circulating water flow; 18: a water pump; 19: a circulating water flow pipeline; 20: exhaust-heat boiler, 21: circulating water flow at low temperature; 22: a granulation chamber; 23: an electric push rod; 24: a signal cable; 25: a driver;
FIG. 7 is a schematic view of: schematic diagram of rotary disc centrifugal granulation: (a) central inflow, (b) eccentric inflow.
Detailed Description
The following experimental examples and examples are intended to further illustrate but not limit the invention.
Example 1 testing the effectiveness of the invention:
and adopting a numerical simulation method, calculating the spreading and granulating process of the whole slag liquid flowing into the upper surface of the turntable through numerical values, applying a flowing boundary condition in a computational fluid mechanics model, and performing iterative calculation of space propulsion time.
The eccentric granulation requires designing different inlet inflow schemes for different structures and different sizes of turntables, such as adjusting the diameter ratio of an inlet to the turntables, the eccentric distance between the center of the inlet and the center of the turntables, and the like. For clarity, the eccentric design method is described below with a turntable of a typical size as an example. The whole eccentric design method comprises the following 6 steps: establishing a numerical model, generating grid division, dispersing a control equation, giving boundary conditions and initial conditions, iteratively solving the numerical equation, and analyzing a calculation result.
In numerical calculations, the following assumptions are made:
1. to simplify the calculation problem, the high-temperature slag is assumed to be subjected to continuous rotary granulation at a constant temperature and a constant flow rate.
2. The temperature change interval of the slag liquid flow in the rotary disc granulation process is small, so the influence of the thermal effect is neglected in the calculation process.
3. The low velocity of the granulated air and slag stream have little change in density during movement, assuming both are incompressible fluids.
1. Numerical model
As the two-dimensional model can not show the eccentric effect, the three-dimensional model is adopted for numerical calculation, and the eccentric granulation geometric model is shown in the following figure, wherein the liquid inlet diameter of the high-temperature slag is 10mm, the diameter of the turntable is 50mm, the eccentric distance is 1.25mm, namely the eccentricity e is 5%, and the calculation formula of the eccentricity e is shown in the following figure. The calculated overall domain diameter was 120mm.
e＝l/r×100％ (1)
In the above formula, e is the eccentricity, l is the distance of the center of the speed inlet deviating from the center of the turntable, and r is the radius of the turntable.
In the calculation process, the influence of temperature and phase change is not considered, the physical properties of air and high-temperature slag liquid are constant, the physical properties of the air at the normal temperature of 25 ℃ are selected, the physical properties of the slag liquid at the temperature of 1400 ℃ are selected, and the physical properties of two materials are shown in table 1:
TABLE 1 calculation of physical Properties parameters of substances
Figure BDA0003737716390000081
2. Numerical model
The geometric model is subjected to meshing, and the sizes of the inlet and the gas-liquid interface on the upper surface of the turntable are encrypted, so that the obtained mesh distribution is shown in the following figure 2:
3. equation of control
A VOF method is adopted to accurately capture a flowing liquid film on the upper surface of a rotary table, liquid filaments and liquid drops in an atomization area in the calculation process, and the method is an interface tracking method established under an Euler grid. The core idea of the method is that mutually incompatible fluid components share a set of control equations, and the phase volume fraction alpha is introduced q This variable allows tracking of phase interfaces within a computational domain of the fluid. Alpha is alpha q The ratio of the volume of one phase to the volume of the grid is expressed, and the mathematical description is shown in formula (2):
Figure BDA0003737716390000082
by solving the continuous equation of the volume fraction of each phase, alpha in each grid is obtained q The phase interface position is determined, and the continuous equation of the volume fraction of each phase is shown in formula (3):
Figure BDA0003737716390000083
in the calculation process, the physical property parameters in the unit grid of each control body are calculated by adopting a method of weighted average of volume fractions of physical properties of all phases, for example, the calculation result of the density in each unit is given by the formula (4):
ρ＝∑α q ρ q (4)
the mass equation and the momentum equation in the control equation are respectively expressed by the formula (5) and the formula (6):
Figure BDA0003737716390000084
Figure BDA0003737716390000085
in the above formula, rho is density and unit is kg/m 3 ；
Figure BDA0003737716390000086
Is a velocity vector with the unit of m/s; mu is dynamic viscosity with Pa · s unit;
Figure BDA0003737716390000091
is the acceleration of gravity with the unit of m/s 2 ；
Figure BDA0003737716390000092
Other volume force source terms are given in N. In the VOF calculation model, the gas-liquid surface tension is represented in a momentum equation by a volume force source term, and the expression is shown as the formula (7):
Figure BDA0003737716390000093
sigma in the above formula ij Is the surface tension coefficient in N/m; subscript i and table j below represent the gas and liquid phases, respectively; k is a radical of i Is surface curvature, phase by unit method
Figure BDA0003737716390000094
The divergence of (A) is defined, and the expression is shown as the formula (8)
Figure BDA0003737716390000095
The SST k- ω model, which considers turbulent shear stress transport, is more accurate and reliable for a wider range of flow classes, and has also proven suitable for describing centrifugal atomization processes. The turbulent kinetic energy k and the specific dissipation factor ω can be obtained from equations (9) and (10).
Figure BDA0003737716390000096
Figure BDA0003737716390000097
In the above formula beta * Beta, alpha and alpha * Are all constant, mu t For turbulent viscosity, σ k And σ ω Turbulent Plantt number, F, of k and omega, respectively 1 Is the first mixing function in the turbulence model.
4. Numerical boundary conditions and initial conditions
The flow speed of the high-temperature slag liquid inlet is kept at 2kg/min, namely the speed inlet is set to be 0.1638m/s; the turntable speed was set at 1780rpm and the calculated domain pressure, i.e. the pressure outlet boundary, was maintained at 1atm. The initial value of the calculated domain liquid phase fraction is set to 0.
5. Iterative solution of numerical equations
And carrying out iterative solution calculation by using a computer according to the discrete equation, the boundary condition and the initial condition. Residual to 10 in the continuity equation, momentum equation, turbulence energy equation, and turbulence energy dissipation ratio equation -3 。
6. Analysis of calculation results
Under the condition of keeping the inlet flow, the rotating speed of the rotary disc and the diameter of the rotary disc consistent, rotary disc atomization results under the four conditions of 5%, 10%, 15% and 20% of eccentricity are respectively calculated in a comparative way. The calculated liquid phase distribution pairs for the atomization results for the 4 off-center conditions are shown in fig. 3. Along with the increase of eccentricity, liquid film thickness distribution is more inhomogeneous, and the disturbance aggravation on the carousel has increaseed the broken possibility of liquid silk in the growth process, leads to carousel edge liquid silk length generally shorter.
After the atomization photo is extracted, the diameter distribution condition of the atomized liquid drop is obtained through picture recognition software, and the ratio of the diameter distribution of the liquid drop to the median diameter under different eccentric conditions is shown in fig. 4 and 5. It can be seen that the particle size distribution is more concentrated under the conditions of no eccentricity and small eccentricity; as the eccentricity increases, the small diameter droplet fraction increases. The reason is that after the eccentricity of the liquid inlet is increased, the liquid film on the upper surface of the rotary disc is distributed more unevenly, the liquid film convergence effect caused by large eccentricity is more obvious, so that a larger area of film zones appear on the rotary disc, the particle sizes obtained by atomization of the edges of the rotary disc in the film zones are all reduced, and finally the median diameter of the eccentrically granulated powder is reduced.
The invention provides a method for reducing the median diameter of rotary disc centrifugal granulating powder, which can be effectively applied to the field of centrifugal granulating powder making of high-temperature slag liquid. By adopting an inflow eccentricity method, the liquid film is not uniformly spread after the liquid column flows to the upper surface of the rotary table, the large eccentricity can cause the excessive concentration of the liquid film, a large-area thin liquid film area appears, and the particle size of the liquid drops granulated at the edge of the rotary table is reduced, so that the ratio of small particle size to small particle size in the granulated powder is improved, and the median diameter of the granulated powder is reduced.
Example 2:
a rotary disk centrifugal granulation apparatus, said apparatus comprising:
the heat preservation device is used for preserving the heat of the high-temperature furnace slag;
the rotary table device is used for atomizing the slag flowing out of the heat preservation device into slag droplets;
the eccentric control device is used for controlling the eccentric flow of the slag into the turntable device;
a cooling device for reducing the temperature of the slag powder;
and the collecting device is used for collecting the slag powder.
Example 3:
a rotary disk centrifugal granulation apparatus, said apparatus comprising:
the heat preservation device is used for preserving the heat of the high-temperature furnace slag;
the rotary table device is used for atomizing the slag flowing out of the heat preservation device into slag droplets;
the eccentric control device is used for controlling the eccentric flow of the slag into the turntable device;
a cooling device for reducing the temperature of the slag powder;
and the collecting device is used for collecting the slag powder.
The eccentric control device guides slag liquid in the high-temperature slag liquid collector to an inlet boundary on the granulation turntable, and realizes eccentric inflow by controlling the diameter of the inlet boundary, the height distance between the inlet boundary and the upper surface of the turntable and the eccentric distance of the central position.
The heat preservation device comprises a high-temperature slag heat preservation device (1), a crucible (2) and a valve (4), wherein the crucible (2) is positioned in the heat preservation device, and the valve (4) is arranged below the crucible (2); the crucible (2) is positioned above the turntable (8), a gap is reserved between the crucible and the turntable, and the crucible (2) is arranged in the high-temperature slag heat preservation device (1); the crucible (2) is not connected with the turntable (8), the crucible is suspended and positioned right above the turntable (8), and high-temperature metal liquid in the crucible flows down onto the turntable (8) through a central hole;
the turntable device comprises a turntable (8), a rotating shaft (9), a coupler (10), a high-speed motor (11) and a motor supporting platform (13), wherein one end of the turntable shaft (9) is connected with the turntable (8), and the other end of the turntable shaft is connected with the coupler (10); the disc shaft (9) and the rotary disc (8) keep coaxial, and the coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the rotary disc (8) and the disc shaft (9) to rotate; the high-speed motor (11) generates power to drive the rotary table (8) and the disc shaft (9) to rotate, and the motor supporting platform (13) is fixed on the inner wall of the granulating chamber (22); the motor supporting platform (13) is a rectangular flat plate which is made of metal or high-strength non-metallic substances and is provided with supporting legs, and the supporting legs are welded on the inner wall of the granulating chamber (22) to provide an adjustable space position for the high-speed motor;
the eccentric control device comprises a motor positioning pulley (12), a driver (25) and an electric push rod (23), wherein the driver (25) can control the electric push rod (23) to move according to a set distance, the electric push rod (23) is connected with the motor positioning pulley, and the upper part of the positioning pulley (12) is fixed with a high-speed motor; the motor positioning pulley (12) consists of 4 universal wheels and is provided with a fixing device for adjusting the position of the motor in the horizontal direction, so that the eccentric distance between the slag liquid flow (5) and the turntable (8) is controlled, the distribution of a slag liquid film on the turntable (8) is influenced, and the aim of adjusting the particle size distribution of the granulated powder is finally fulfilled.
The cooling device comprises a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying cooled circulating water flow (21) to the position between the wall surfaces of the granulating chamber; the high-temperature circulating water flow (17) flows out from a cooling channel in the middle of the double-layer wall surface of the granulating chamber and is mainly used for transferring heat absorbed by the wall surface of the granulating chamber to the waste heat boiler (20) so as to recycle the wall surface heat.
The water pump (18) is used for providing power for the wall surface cooling circulating water flow, and the water flow can smoothly flow in the wall surface of the granulating chamber and the circulating water flow pipeline (19).
The circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying the cooled circulating water flow (21) into the cooling channel between the wall surfaces of the granulating chambers to absorb the heat on the wall surfaces of the granulating chambers.
The waste heat boiler (20) is used for cooling circulating water flow between the wall surfaces of the granulation chamber, absorbing heat of high-temperature water flow (17) discharged from the wall surfaces of the granulation chamber, and is a main energy conversion device for recovering heat.
And the low-temperature circulating water flow (21) is discharged after being cooled by the waste heat boiler, enters the double-layer wall of the granulating chamber again, absorbs the heat of the wall surface and reduces the temperature of the wall surface.
The collecting system comprises a granulating chamber (22), a flange (16) and an elbow (15), wherein the elbow (15) is connected below the granulating chamber, and the pipeline interface flange (16) is positioned at the tail end of the elbow (15). The elbow (15) is connected below the granulating chamber and is used for leading out the granulated particles. The elbow can adopt a 90-degree elbow, and can also be designed into a required angle according to the position of downstream equipment. The pipeline interface flange (16) is positioned at the tail end of the elbow (15) and is used for connecting a downstream particle size classifier or a collecting tank.
The number of the motor positioning pulleys (12) is 2, and the set distance is 4mm; the turntable (8) and the crucible outlet are coaxially aligned; the crucible (2) and the high-temperature slag heat preservation device (1) are connected through a bolt or a flange, or are seated on the bottom surface of the heat preservation device (1), and the bottom surface of the heat preservation device (1) is provided with a hole.
Example 4:
a rotating disk centrifugal granulating apparatus, said apparatus comprising:
the heat preservation device is used for preserving the heat of the high-temperature furnace slag;
the rotary table device is used for atomizing the slag flowing out of the heat preservation device into slag droplets;
the eccentric control device is used for controlling the slag to eccentrically flow into the turntable device;
a cooling device for reducing the temperature of the slag powder;
and the collecting device is used for collecting the slag powder.
The eccentric control device guides slag liquid in the high-temperature slag liquid collector to an inlet boundary on the granulating rotary table, and eccentric inflow is realized by controlling the diameter of the inlet boundary, the height distance between the inlet boundary and the upper surface of the rotary table and the eccentric distance of the central position.
The heat preservation device comprises a high-temperature slag heat preservation device (1), a crucible (2) and a valve (4), wherein the crucible (2) is positioned in the heat preservation device, and the valve (4) is arranged below the crucible (2); the crucible (2) is positioned above the turntable (8), a gap is reserved between the crucible and the turntable, and the crucible (2) is arranged in the high-temperature slag heat preservation device (1); the crucible (2) is not connected with the turntable (8), the crucible is suspended and positioned right above the turntable (8), and high-temperature metal liquid in the crucible flows down onto the turntable (8) through a central hole;
the turntable device comprises a turntable (8), a rotating shaft (9), a coupler (10), a high-speed motor (11) and a motor supporting platform (13), wherein one end of the turntable shaft (9) is connected with the turntable (8), and the other end of the turntable shaft is connected with the coupler (10); the disc shaft (9) and the rotary disc (8) keep coaxial, and the coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the rotary disc (8) and the disc shaft (9) to rotate; the high-speed motor (11) generates power to drive the turntable (8) and the turntable shaft (9) to rotate, and the motor supporting platform (13) is fixed on the inner wall of the granulating chamber (22); the motor supporting platform (13) is a rectangular flat plate which is made of metal or high-strength non-metallic substances and is provided with supporting legs, and the supporting legs are welded on the inner wall of the granulating chamber (22) to provide an adjustable space position for the high-speed motor;
the eccentric control device comprises a motor positioning pulley (12), a driver (25) and an electric push rod (23), wherein the driver (25) can control the electric push rod (23) to move according to a set distance, the electric push rod (23) is connected with the motor positioning pulley, and the upper part of the positioning pulley (12) is fixed with a high-speed motor; the motor positioning pulley (12) consists of 5 universal wheels and is provided with a fixing device for adjusting the position of the motor in the horizontal direction, so that the eccentric distance between the slag liquid flow (5) and the turntable (8) is controlled, the distribution of a slag liquid film on the turntable (8) is influenced, and the aim of adjusting the particle size distribution of the granulated powder is finally fulfilled.
The cooling device comprises a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying cooled circulating water flow (21) to the position between the wall surfaces of the granulating chamber; the high-temperature circulating water flow (17) flows out from a cooling channel in the middle of the double-layer wall surface of the granulating chamber and is mainly used for transferring heat absorbed by the wall surface of the granulating chamber to the waste heat boiler (20) so as to recycle the wall surface heat.
The water pump (18) is used for providing power for the wall surface cooling circulating water flow, and the water flow can smoothly flow in the wall surface of the granulating chamber and the circulating water flow pipeline (19).
The circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying the cooled circulating water flow (21) into the cooling channel between the wall surfaces of the granulating chambers to absorb the heat on the wall surfaces of the granulating chambers.
The waste heat boiler (20) is used for cooling circulating water flow between the wall surfaces of the granulating chambers, absorbing heat of high-temperature water flow (17) discharged from the wall surfaces of the granulating chambers, and is a main energy conversion device for recovering heat.
And the low-temperature circulating water flow (21) is discharged after being cooled by the waste heat boiler, enters the double-layer wall of the granulating chamber again, absorbs the heat of the wall surface and reduces the temperature of the wall surface.
The collecting system comprises a granulating chamber (22), a flange (16) and an elbow (15), wherein the elbow (15) is connected below the granulating chamber, and the pipeline interface flange (16) is positioned at the tail end of the elbow (15). The elbow (15) is connected below the granulating chamber and is used for leading out the granulated particles. The elbow can adopt a 90-degree elbow and can also be designed into a required angle according to the position of downstream equipment. The pipeline interface flange (16) is positioned at the tail end of the elbow (15) and is used for connecting a downstream particle size classifier or a collecting tank. If the continuous granulating recovery is carried out, the granulating chamber and the downstream classifier are combined to realize on-line classification, so that the production efficiency is improved. If continuous granulation is not needed, a granulated powder collecting tank can be directly connected to the pipeline interface flange (20), and subsequent particle size classification and packaging transportation can be carried out after the powder collection is finished.
The number of the motor positioning pulleys (12) is more than or equal to 1, and the set distance is 2mm; the turntable (8) and the crucible outlet are coaxially aligned; the crucible (2) and the high-temperature slag heat preservation device (1) are connected through a bolt or a flange, or are seated on the bottom surface of the heat preservation device (1), and the bottom surface of the heat preservation device (1) is provided with a hole.
The granulation chamber (22) is also provided with granulation chamber supporting legs (14) which are firmly installed with the ground through connecting fixing pieces, the connecting fixing pieces are foundation screws, and the high-temperature slag heat preservation device (1) is of a metal structure with a heat preservation effect; the device mainly aims at preserving heat of high-temperature slag discharged in the steel smelting process and preventing heat from seriously dissipating, and on one hand, the device is used for improving heat recovery efficiency; on the other hand, the method is used for keeping the superheat degree of the slag to be high and preventing the solidification from being too low in temperature to block the valve. The crucible (2) is made of a temperature-resistant material; the valve (4) is made of high-temperature resistant material; the turntable (8) is in a thin cylinder shape, the diameter range is 100mm, the thickness is 1mm, the turntable is made of a hard material capable of resisting high temperature, and the temperature is 700 ℃; the edge circle run-out error of the rotary table (8) is less than or equal to 0.02mm; the coaxiality of the disc shaft (9) and the turntable (8) is kept, and the error is less than or equal to 0.01mm; the high speed motor (11) has a rotational speed equal to 2000rpm.
The high-temperature slag liquid flow (5) is formed by the way that the high-temperature slag liquid (3) flows out through a valve (4) after being subjected to heat preservation in the crucible (2). The high-temperature slag liquid film (6) is formed by spreading the slag liquid flow (5) on the disc surface of the rotary disc. The granulated slag droplets (7) are formed by tearing and breaking the liquid film (6) at the edge of the rotary table due to the action of centrifugal force generated by high-speed rotation of the rotary table.
The disc shaft (9) can be integrally processed with the disc (8) or processed independently and then is welded or bonded with the disc (8), the diameter and the length of the disc shaft (9) are designed and processed according to the requirements of mounting parts (such as a coupler), and the disc shaft (9) and the disc (8) are required to keep coaxiality in order to ensure dynamic balance precision.
The coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the turntable (8) and the disc shaft (9) to rotate at a high speed.
The high-speed motor (11) is used for generating power to drive the turntable (8) and the turntable shaft (9) to rotate at a high speed, and the rotating speed is required to be more than 2000rpm. In order to adjust the rotating speed, the high-speed motor (11) is driven by a frequency converter, water is filled in the motor for cooling, and good lubrication is guaranteed. A high-temperature-resistant heat insulation layer wraps the periphery of the motor, and more effective heat protection can be achieved.
The shape of the granulating chamber (22) is a structure of a section of cylinder and a section of cone; the granulating chamber (22) is a container for centrifugal granulating process and is made of carbon steel; the wall surface of the atomizing part of the granulating chamber is of a double-layer structure, and a cooling channel is processed inside the granulating chamber; the crucible (2) is made of stainless steel, graphite and ceramic; the bottom of the crucible is provided with a contraction opening; the valve (4) is made of graphite; the high-speed motor (11) is driven by a frequency converter, and water is introduced into the motor for cooling; a high-temperature resistant heat insulation layer is wrapped on the periphery of the motor; the diameter of the granulating chamber is larger than the track length of solidified granulated liquid drops.
Too small a diameter will result in droplets adhering to the inner wall of the granulation chamber. The lower part of the granulating chamber is conical and is used for collecting solidified slag particles. The wall surface of the atomizing chamber is of a double-layer structure, and a cooling channel is processed in the atomizing chamber and used for cooling water to flow and take away heat transferred in the high-temperature slag granulation process.
Example 5:
a rotary disk centrifugal granulation apparatus, said apparatus comprising:
the heat preservation device is used for preserving the heat of the high-temperature furnace slag;
the rotary table device is used for atomizing the slag flowing out of the heat preservation device into slag droplets;
the eccentric control device is used for controlling the eccentric flow of the slag into the turntable device;
a cooling device for reducing the temperature of the slag powder;
and the collecting device is used for collecting the slag powder.
The eccentric control device guides slag liquid in the high-temperature slag liquid collector to an inlet boundary on the granulation turntable, and realizes eccentric inflow by controlling the diameter of the inlet boundary, the height distance between the inlet boundary and the upper surface of the turntable and the eccentric distance of the central position.
The heat preservation device comprises a high-temperature slag heat preservation device (1), a crucible (2) and a valve (4), wherein the crucible (2) is positioned in the heat preservation device, and the valve (4) is arranged below the crucible (2); the crucible (2) is positioned above the turntable (8), a gap is reserved between the crucible and the turntable, and the crucible (2) is arranged in the high-temperature slag heat preservation device (1); the crucible (2) is not connected with the turntable (8), the crucible is suspended and positioned right above the turntable (8), and high-temperature metal liquid in the crucible flows down to the turntable (8) through the center hole;
the turntable device comprises a turntable (8), a rotating shaft (9), a coupler (10), a high-speed motor (11) and a motor supporting platform (13), wherein one end of the turntable shaft (9) is connected with the turntable (8), and the other end of the turntable shaft is connected with the coupler (10); the disc shaft (9) and the rotary disc (8) keep coaxial, and the coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the rotary disc (8) and the disc shaft (9) to rotate; the high-speed motor (11) generates power to drive the rotary table (8) and the disc shaft (9) to rotate, and the motor supporting platform (13) is fixed on the inner wall of the granulating chamber (22); the motor supporting platform (13) is a rectangular flat plate which is made of metal or high-strength non-metallic substances and is provided with supporting legs, and the supporting legs are welded on the inner wall of the granulating chamber (22) to provide an adjustable space position for the high-speed motor;
the eccentric control device comprises a motor positioning pulley (12), a driver (25) and an electric push rod (23), wherein the driver (25) can control the electric push rod (23) to move according to a set distance, the electric push rod (23) is connected with the motor positioning pulley, and the upper part of the positioning pulley (12) is fixed with a high-speed motor; the motor positioning pulley (12) consists of 3 universal wheels and is provided with a fixing device and is used for adjusting the position of the motor in the horizontal direction, so that the eccentric distance between the slag liquid flow (5) and the rotating disc (8) is controlled, the slag liquid film distribution on the rotating disc (8) is influenced, and the aim of adjusting the particle size distribution of the granulated powder is finally achieved.
The cooling device comprises a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying the cooled circulating water flow (21) to the position between the wall surfaces of the granulating chamber; the high-temperature circulating water flow (17) flows out from a cooling channel in the middle of the double-layer wall surface of the granulating chamber and is mainly used for transferring heat absorbed by the wall surface of the granulating chamber to the waste heat boiler (20) so as to recycle the wall surface heat.
The water pump (18) is used for providing power for the wall surface cooling circulating water flow, and the water flow can smoothly flow in the wall surface of the granulating chamber and the circulating water flow pipeline (19).
And the circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying the cooled circulating water flow (21) into the cooling channel between the wall surfaces of the granulating chambers to absorb the heat on the wall surfaces of the granulating chambers.
The waste heat boiler (20) is used for cooling circulating water flow between the wall surfaces of the granulation chamber, absorbing heat of high-temperature water flow (17) discharged from the wall surfaces of the granulation chamber, and is a main energy conversion device for recovering heat.
And the low-temperature circulating water flow (21) is discharged after being cooled by the waste heat boiler, enters the double-layer wall of the granulating chamber again, absorbs the heat of the wall surface and reduces the temperature of the wall surface.
The collecting system comprises a granulating chamber (22), a flange (16) and an elbow (15), wherein the elbow (15) is connected below the granulating chamber, and the pipeline interface flange (16) is positioned at the tail end of the elbow (15). The elbow (15) is connected below the granulating chamber and is used for leading out the granulated particles. The elbow can adopt a 90-degree elbow and can also be designed into a required angle according to the position of downstream equipment. The pipeline interface flange (16) is positioned at the tail end of the elbow (15) and is used for connecting a downstream particle size classifier or a collecting tank. If the continuous granulating recovery is carried out, the granulating chamber and the downstream classifier are combined to realize on-line classification, so that the production efficiency is improved. If continuous granulation is not required, the pipeline interface flange (20) can be directly connected with a granulated powder collecting tank, and subsequent particle size classification and packaging transportation can be carried out after the powder is collected.
Furthermore, the number of the motor positioning pulleys (12) is more than or equal to 1, and the set distance is 9mm; the turntable (8) and the crucible outlet are coaxially aligned; the crucible (2) and the high-temperature slag heat preservation device (1) are connected through a bolt or a flange, or are seated on the bottom surface of the heat preservation device (1), and the bottom surface of the heat preservation device (1) is provided with a hole.
Furthermore, the granulation chamber (22) is also provided with granulation chamber supporting legs (14) which are firmly installed with the ground through connecting and fixing pieces, and the connecting and fixing pieces comprise foundation bolts so as to ensure that the position of the granulation chamber is not changed in the working process; the high-temperature slag heat preservation device (1) is of a metal structure with a heat preservation effect; the device mainly aims at preserving heat of high-temperature slag discharged in the steel smelting process and preventing serious heat loss, and on one hand, the device is used for improving the heat recovery efficiency; on the other hand, the method is used for keeping the superheat degree of the slag to be high and preventing the solidification caused by too low temperature from blocking a valve. The crucible (2) is made of a temperature-resistant material; the valve (4) is made of high-temperature resistant material; the turntable (8) is a thin cylinder, the diameter range is 150mm, the thickness is 7-8mm, the material is a hard material which can resist high temperature, and the temperature is above 600 ℃; the edge circle run-out error of the turntable (8) is less than or equal to 0.02mm; the coaxiality of the disc shaft (9) and the rotary disc (8) is kept, and the error is less than or equal to 0.01mm; the rotating speed of the high-speed motor (11) is more than or equal to 2000rpm.
The high-temperature slag liquid flow (5) is formed by the way that the high-temperature slag liquid (3) flows out through a valve (4) after being subjected to heat preservation in the crucible (2). The high-temperature slag liquid film (6) is formed by spreading the slag liquid flow (5) on the disc surface of the rotary disc. The granulated slag droplets (7) are formed by tearing and breaking the liquid film (6) at the edge of the rotary table due to the action of centrifugal force generated by high-speed rotation of the rotary table.
The disc shaft (9) can be integrally processed with the disc (8) or processed independently and then is welded or bonded with the disc (8), the diameter and the length of the disc shaft (9) are designed and processed according to the requirements of mounting parts (such as a coupler), and the disc shaft (9) and the disc (8) are required to keep coaxiality in order to ensure dynamic balance precision.
The coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the turntable (8) and the disc shaft (9) to rotate at a high speed.
The high-speed motor (11) is used for generating power to drive the turntable (8) and the disc shaft (9) to rotate at a high speed, and the rotating speed is required to be more than 2000rpm. In order to adjust the rotating speed, the high-speed motor (11) is driven by a frequency converter, water is filled in the motor for cooling, and good lubrication is guaranteed. A high-temperature-resistant heat insulation layer wraps the periphery of the motor, and heat protection with a better effect can be realized.
Further, the shape of the granulating chamber (22) is a structure of a section of cylinder and a section of cone; the granulating chamber (22) is a container for centrifugal granulating process, and the material comprises carbon steel or stainless steel; the wall surface of the atomizing part of the granulating chamber is of a double-layer structure, and a cooling channel is processed inside the granulating chamber; the crucible (2) is made of stainless steel, graphite and ceramic; the bottom of the crucible is provided with a contraction opening; the material of the valve (4) comprises graphite and ceramic; the high-speed motor (11) is driven by a frequency converter, and water is introduced into the motor for cooling; a high-temperature-resistant heat insulation layer wraps the periphery of the motor; the diameter of the granulating chamber is larger than the track length of solidified granulated liquid drops.
Too small a diameter will result in droplets adhering to the inner wall of the granulation chamber. The lower part of the granulating chamber is conical and is used for collecting solidified slag particles. The wall surface of the atomizing chamber is of a double-layer structure, and a cooling channel is processed in the atomizing chamber and used for cooling water to flow and take away heat transferred in the high-temperature slag granulation process.
Example 6: a method of using a rotating disk centrifugal granulation apparatus, using the apparatus of example 1, the method steps comprising:
preserving the high-temperature furnace slag by using a heat preservation device; controlling the slag to eccentrically flow into the turntable device by using an eccentric control device, and atomizing the slag flowing out of the heat preservation device into slag droplets by using the turntable device; reducing the temperature of the slag powder using a cooling device; the slag powder was collected using a collection device.
Example 7: a method of using a rotating disk centrifugal granulation apparatus, using the apparatus of example 5, the method steps comprising: starting a high-speed motor (11) to rotate at a high speed, driving a rotary table (8) to rotate at a high speed through a coupler (10) and a rotating shaft (9), forming a vertical downward high-temperature slag liquid flow (5) by a high-temperature slag liquid (3) which is melted into a liquid state in a crucible (2) through a valve (4), flowing onto the rotary table (8) rotating at the high speed right below, forming a high-temperature slag liquid film (6) on the upper surface of the rotary table (8) by the liquid flow, and throwing out at a high speed to form granulated slag liquid drops (7) after reaching the edge; at the initial moment, the turntable (8) and the high-temperature slag liquid flow (5) are coaxially aligned, in order to realize the eccentric granulation process, the required eccentric amount M is input through the driver (25), the driver (25) commands the electric push rod (23) to move according to the set distance through a signal cable, the electric push rod (23) is connected with the motor positioning pulley, and then the motor positioning pulley (12) moves for the distance M on the left and right of the horizontal plane; the upper part of the positioning pulley (12) is fixed with a high-speed motor, the high-speed motor (11) and a disc shaft (9) on the positioning pulley are driven, and the turntable (8) is further driven to move left and right in the horizontal plane M, so that the center of the turntable (8) and the center of the high-temperature slag liquid flow (5) deviate from M, and the M eccentricity is generated after the liquid flow (5) flows to the upper surface of the turntable (8); starting a cooling device, a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for transporting high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously transporting cooled circulating water flow (21) to a position between the wall surfaces of the granulating chamber; opening a flange of the collecting system, and collecting the powder to obtain the powder.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims. It will be understood that the invention is not limited to what has been described above and that various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. A rotating disc centrifugal granulating apparatus, characterized in that said apparatus comprises:
the heat preservation device is used for preserving the heat of the high-temperature furnace slag;
the rotary table device is used for atomizing the slag flowing out of the heat preservation device into slag droplets;
the eccentric control device is used for controlling the eccentric flow of the slag into the turntable device;
a cooling device for reducing the temperature of the slag powder;
and the collecting device is used for collecting the slag powder.
2. The rotary pan centrifugal granulation apparatus of claim 1, wherein: the eccentric control device guides slag liquid in the high-temperature slag liquid collector to an inlet boundary on the granulation turntable, and realizes eccentric inflow by controlling the diameter of the inlet boundary, the height distance between the inlet boundary and the upper surface of the turntable and the eccentric distance of the central position.
3. The rotary pan centrifugal granulation apparatus of claim 1, wherein: the heat preservation device comprises a high-temperature slag heat preservation device (1), a crucible (2) and a valve (4), wherein the crucible (2) is positioned in the heat preservation device, and the valve (4) is arranged below the crucible (2); the crucible (2) is positioned above the turntable (8), a gap is reserved between the crucible and the turntable, and the crucible (2) is arranged in the high-temperature slag heat preservation device (1);
the turntable device comprises a turntable (8), a rotating shaft (9), a coupler (10), a high-speed motor (11) and a motor supporting platform (13), wherein one end of the turntable shaft (9) is connected with the turntable (8), and the other end of the turntable shaft is connected with the coupler (10); the disc shaft (9) and the turntable (8) keep coaxial, and the coupling (10) is used for connecting a rotating shaft of the high-speed motor (11) with the disc shaft (9), transmitting the torque and the rotating speed of the motor and driving the turntable (8) and the disc shaft (9) to rotate; the high-speed motor (11) generates power to drive the rotary table (8) and the disc shaft (9) to rotate, and the motor supporting platform (13) is fixed on the inner wall of the granulating chamber (22);
the eccentric control device comprises a motor positioning pulley (12), a driver (25) and an electric push rod (23), wherein the driver (25) can control the electric push rod (23) to move according to a set distance, the electric push rod (23) is connected with the motor positioning pulley, and the upper part of the positioning pulley (12) is fixed with a high-speed motor;
the cooling device comprises a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for conveying high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously conveying cooled circulating water flow (21) to the position between the wall surfaces of the granulating chamber;
the collecting system comprises a granulating chamber (22), a flange (16) and an elbow (15), wherein the elbow (15) is connected below the granulating chamber, and the pipeline interface flange (16) is positioned at the tail end of the elbow (15).
4. The rotary disk centrifugal granulating apparatus of claim 3, wherein: the number of the motor positioning pulleys (12) is more than or equal to 1, the set distance is M, and M is 1-10mm; the turntable (8) and the crucible outlet are coaxially aligned; the crucible (2) and the high-temperature slag heat preservation device (1) are connected through a bolt or a flange, or are seated on the bottom surface of the heat preservation device (1), and the bottom surface of the heat preservation device (1) is provided with a hole.
5. The rotary pan centrifugal granulation apparatus of claim 3, wherein: the granulation chamber (22) is also provided with granulation chamber supporting legs (14) which are firmly installed with the ground through connecting and fixing pieces, and the connecting and fixing pieces comprise foundation bolts; the high-temperature furnace slag heat preservation device (1) is of a metal structure with a heat preservation effect; the crucible (2) is made of a temperature-resistant material; the valve (4) is made of high-temperature resistant material; the turntable (8) is a thin cylinder, the diameter range is 30-200mm, the thickness is 0.5-10mm, and the turntable is made of a hard material capable of resisting high temperature; the edge circle run-out error of the turntable (8) is less than or equal to 0.02mm; the coaxiality of the disc shaft (9) and the rotary disc (8) is kept, and the error is less than or equal to 0.01mm; the rotating speed of the high-speed motor (11) is more than or equal to 2000rpm.
6. The rotary pan centrifugal granulation apparatus of claim 5, wherein: the shape of the granulating chamber (22) is a structure of a section of cylinder and a section of cone; the granulating chamber (22) is a container for centrifugal granulating process, and the material comprises carbon steel or stainless steel; the wall surface of the atomizing part of the granulating chamber is of a double-layer structure, and a cooling channel is processed inside the granulating chamber; the crucible (2) is made of stainless steel, graphite and ceramic; the bottom of the crucible is provided with a contraction opening; the material of the valve (4) comprises graphite and ceramic; the high-speed motor (11) is driven by a frequency converter, and water is introduced into the motor for cooling; a high-temperature resistant heat insulation layer is wrapped on the periphery of the motor; the diameter of the granulating chamber is larger than the track length of solidified granulated liquid drops.
7. The use method of the rotary disc centrifugal granulating device is characterized in that: use of the apparatus according to any of claims 1-2, the method steps comprising:
preserving the high-temperature furnace slag by using a heat preservation device; controlling the slag to eccentrically flow into the turntable device by using an eccentric control device, and atomizing the slag flowing out of the heat preservation device into slag droplets by using the turntable device; reducing the temperature of the slag powder using a cooling device; the slag powder was collected using a collection device.
8. The use method of the rotary disc centrifugal granulating device is characterized in that: with the apparatus according to any of claims 3-7, the method steps comprising:
starting a high-speed motor (11) to rotate at a high speed, driving a turntable (8) to rotate at a high speed through a coupler (10) and a rotating shaft (9), forming a vertically downward high-temperature slag liquid flow (5) by high-temperature slag liquid (3) which is melted into a liquid state in a crucible (2) through a valve (4), flowing onto the turntable (8) which rotates at a high speed right below, forming a high-temperature slag liquid film (6) on the upper surface of the turntable (8) by the liquid flow, and throwing out at a high speed after reaching the edge to form granulated slag liquid drops (7); at the initial moment, the turntable (8) and the high-temperature slag liquid flow (5) are coaxially aligned, in order to realize the eccentric granulation process, a required eccentric distance M is input through a driver (25), the driver (25) commands the electric push rod (23) to move according to a set distance through a signal cable, the electric push rod (23) is connected with the motor positioning pulley, and the motor positioning pulley (12) moves for the distance M on the left and right of a horizontal plane; the upper part of the positioning pulley (12) is fixed with a high-speed motor, the high-speed motor (11) and a disc shaft (9) on the positioning pulley are driven, and the turntable (8) is further driven to move left and right in the horizontal plane by M distance, so that the center of the turntable (8) and the center of the high-temperature slag liquid flow (5) deviate by the M distance, and the liquid flow (5) generates an eccentric amount with the M distance after flowing to the upper surface of the turntable (8); starting a cooling device, a water pump (18), a circulating water flow pipeline (19) and a waste heat boiler (20), wherein the circulating water flow pipeline (19) is used for transporting high-temperature water flow into the waste heat boiler (20) for heat recovery, and then continuously transporting cooled circulating water flow (21) to a position between the wall surfaces of the granulating chamber; opening a flange of the collecting system, and collecting the powder to obtain the powder.
9. The method of using a rotating disk centrifugal granulating apparatus as claimed in claim 7, wherein: m is 1-10mm.
10. A centrifugal granulating apparatus with rotating discs as claimed in any one of claims 1 to 6 for reducing the particle size of powders.
CN202210806057.5A 2022-07-08 2022-07-08 Particle size control system, method and application for centrifugal granulation and pulverization of turntable Active CN115198041B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210806057.5A CN115198041B (en) 2022-07-08 2022-07-08 Particle size control system, method and application for centrifugal granulation and pulverization of turntable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210806057.5A CN115198041B (en) 2022-07-08 2022-07-08 Particle size control system, method and application for centrifugal granulation and pulverization of turntable

Publications (2)

Publication Number Publication Date
CN115198041A true CN115198041A (en) 2022-10-18
CN115198041B CN115198041B (en) 2023-10-17

Family

ID=83581006

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210806057.5A Active CN115198041B (en) 2022-07-08 2022-07-08 Particle size control system, method and application for centrifugal granulation and pulverization of turntable

Country Status (1)

Country Link
CN (1) CN115198041B (en)

Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703169A1 (en) * 1976-01-30 1977-08-11 United Technologies Corp METAL POWDER PRODUCTION METHOD AND DEVICE
DE2814743A1 (en) * 1977-04-15 1978-10-19 Wurth Paul Sa PROCESS FOR TREATMENT OF METALLURGICAL SLAG AND EQUIPMENT FOR CARRYING OUT THE PROCESS
CN1103484A (en) * 1993-06-30 1995-06-07 三菱麻铁里亚尔株式会社 Apparatus for water-granulating slag
CN1888081A (en) * 2006-07-20 2007-01-03 重庆大学 Liquid blast furnace slag pelletizing method and apparatus for heat recovering process
CN101053975A (en) * 2006-04-14 2007-10-17 张维田 System and method for producing cement short flow-process with metallurgical furnace slag
CN102864254A (en) * 2012-09-13 2013-01-09 清华大学 Method and system for molten slag granulation and sensible heat recovery
CN102864252A (en) * 2012-09-13 2013-01-09 清华大学 Slag granulation and sensible heat recovery method and system
CN102925599A (en) * 2012-10-23 2013-02-13 鞍钢股份有限公司 Recycling device and method for sensible heat of blast furnace slag
CN202804188U (en) * 2012-10-22 2013-03-20 罗登俊 Device utilizing centrifugal atomization method to prepare spherical tin alloy powder
CN103695581A (en) * 2013-12-16 2014-04-02 北京中冶设备研究设计总院有限公司 Process and equipment for slag granulation and sensible heat recovery of blast furnace
CN103695580A (en) * 2013-12-16 2014-04-02 北京中冶设备研究设计总院有限公司 Blast furnace slag granulation device
CN103764853A (en) * 2011-08-26 2014-04-30 西门子有限公司 Dry slag granulation device & method
GB201414064D0 (en) * 2014-08-08 2014-09-24 Siemens Vai Metals Tech Gmbh Slag granulation system
CN104428428A (en) * 2012-09-06 2015-03-18 英国西门子公司 Dry slag granulation system
US20160326040A1 (en) * 2015-05-04 2016-11-10 Peter Beemsterboer Glass-making-quality granulated slag process
CN106435068A (en) * 2016-11-29 2017-02-22 安徽工业大学 Blast furnace molten slag dry method treatment device based on high-temperature slag waste heat recovery
CN106435065A (en) * 2016-10-14 2017-02-22 北京立化科技有限公司 Granulation system for processing high-temperature molten slag
CN106939363A (en) * 2017-02-28 2017-07-11 西安交通大学 For molten slag dry-type centrifugal granulation and the system and control method of waste heat recovery
CN108796147A (en) * 2018-09-05 2018-11-13 安徽工业大学 A kind of blast furnace slag granulation and the method for waste heat recovery
CN109022646A (en) * 2018-09-05 2018-12-18 安徽工业大学 A kind of slag granulation method of grading
CN110218824A (en) * 2019-06-05 2019-09-10 青岛大学 A kind of blast furnace slag centrifugal granulation droplet measurement system and method based on image recognition
CN110320797A (en) * 2019-07-05 2019-10-11 青岛大学 Blast furnace slag mechanical centrifugal is granulated adaptive control system and method
CN110484664A (en) * 2019-09-27 2019-11-22 重庆大学 High-temperature liquid state slag centrifugal granulation residual neat recovering system creation method
WO2020007720A1 (en) * 2018-07-03 2020-01-09 Institut Polytechnique De Grenoble Granulation method and device
CN210746469U (en) * 2019-07-04 2020-06-16 汤耀庆 Pavement washing robot trolley
CN113059169A (en) * 2021-03-18 2021-07-02 中国科学院力学研究所 Device for producing high-temperature metal powder by adopting turntable centrifugal atomization method

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703169A1 (en) * 1976-01-30 1977-08-11 United Technologies Corp METAL POWDER PRODUCTION METHOD AND DEVICE
DE2814743A1 (en) * 1977-04-15 1978-10-19 Wurth Paul Sa PROCESS FOR TREATMENT OF METALLURGICAL SLAG AND EQUIPMENT FOR CARRYING OUT THE PROCESS
CN1103484A (en) * 1993-06-30 1995-06-07 三菱麻铁里亚尔株式会社 Apparatus for water-granulating slag
CN101053975A (en) * 2006-04-14 2007-10-17 张维田 System and method for producing cement short flow-process with metallurgical furnace slag
CN1888081A (en) * 2006-07-20 2007-01-03 重庆大学 Liquid blast furnace slag pelletizing method and apparatus for heat recovering process
CN103764853A (en) * 2011-08-26 2014-04-30 西门子有限公司 Dry slag granulation device & method
CN104428428A (en) * 2012-09-06 2015-03-18 英国西门子公司 Dry slag granulation system
CN102864252A (en) * 2012-09-13 2013-01-09 清华大学 Slag granulation and sensible heat recovery method and system
CN102864254A (en) * 2012-09-13 2013-01-09 清华大学 Method and system for molten slag granulation and sensible heat recovery
CN202804188U (en) * 2012-10-22 2013-03-20 罗登俊 Device utilizing centrifugal atomization method to prepare spherical tin alloy powder
CN102925599A (en) * 2012-10-23 2013-02-13 鞍钢股份有限公司 Recycling device and method for sensible heat of blast furnace slag
CN103695581A (en) * 2013-12-16 2014-04-02 北京中冶设备研究设计总院有限公司 Process and equipment for slag granulation and sensible heat recovery of blast furnace
CN103695580A (en) * 2013-12-16 2014-04-02 北京中冶设备研究设计总院有限公司 Blast furnace slag granulation device
GB201414064D0 (en) * 2014-08-08 2014-09-24 Siemens Vai Metals Tech Gmbh Slag granulation system
US20160326040A1 (en) * 2015-05-04 2016-11-10 Peter Beemsterboer Glass-making-quality granulated slag process
CN106435065A (en) * 2016-10-14 2017-02-22 北京立化科技有限公司 Granulation system for processing high-temperature molten slag
CN106435068A (en) * 2016-11-29 2017-02-22 安徽工业大学 Blast furnace molten slag dry method treatment device based on high-temperature slag waste heat recovery
CN106939363A (en) * 2017-02-28 2017-07-11 西安交通大学 For molten slag dry-type centrifugal granulation and the system and control method of waste heat recovery
WO2020007720A1 (en) * 2018-07-03 2020-01-09 Institut Polytechnique De Grenoble Granulation method and device
CN108796147A (en) * 2018-09-05 2018-11-13 安徽工业大学 A kind of blast furnace slag granulation and the method for waste heat recovery
CN109022646A (en) * 2018-09-05 2018-12-18 安徽工业大学 A kind of slag granulation method of grading
CN110218824A (en) * 2019-06-05 2019-09-10 青岛大学 A kind of blast furnace slag centrifugal granulation droplet measurement system and method based on image recognition
CN210746469U (en) * 2019-07-04 2020-06-16 汤耀庆 Pavement washing robot trolley
CN110320797A (en) * 2019-07-05 2019-10-11 青岛大学 Blast furnace slag mechanical centrifugal is granulated adaptive control system and method
CN110484664A (en) * 2019-09-27 2019-11-22 重庆大学 High-temperature liquid state slag centrifugal granulation residual neat recovering system creation method
CN113059169A (en) * 2021-03-18 2021-07-02 中国科学院力学研究所 Device for producing high-temperature metal powder by adopting turntable centrifugal atomization method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
彭磊: "离心雾化过程中转盘的耦合传热数值研究", 《北京航空航天大学学报》, pages 1 - 14 *
李兵: "高炉渣热资源回收及利用展望", 《科技风》, no. 4, pages 87 - 91 *

Also Published As

Publication number Publication date
CN115198041B (en) 2023-10-17

Similar Documents

Publication Publication Date Title
CN108359756B (en) Dry centrifugal granulation and waste heat recycling system for liquid slag
CA2224145C (en) Conveyor/cooler of loose materials
CN112146446B (en) Blast furnace slag granulation heat exchange device based on multi-medium coupling
CN102925599A (en) Recycling device and method for sensible heat of blast furnace slag
CN105642062A (en) Device and method for removing fine particles in gas in supergravity manner
CN109207659A (en) A kind of granulating device and heat recovery method of liquid slag
CN108796147B (en) Blast furnace slag granulation and waste heat recovery method
CN209792610U (en) Ultrasonic vibration atomizing chamber and atomizing powder-making equipment comprising same
CN115198041B (en) Particle size control system, method and application for centrifugal granulation and pulverization of turntable
CN102847950A (en) High-frequency plasma multifunctional powder production equipment
CN206996182U (en) A kind of gas-liquid separator of replaceable separating mechanism
CN206082460U (en) High slag dry process pelletization device of water -cooling carousel formula
AU2011257264B2 (en) Method and device for manufacturing vitreous
US4373883A (en) Apparatus for producing granules from molten metallurgical slags
CN207170959U (en) A kind of porous revolving cup centrifugal granulation device
TWM631818U (en) Conductive material ultrafine powder preparation device
CN110195133A (en) A kind of converter slag treatment system and processing method
CN203754745U (en) Blast furnace coal gas gravity dust collector with cooling effect
CN107674929B (en) A kind of fused solution slag particle and the method and its system and device of heat exchange
CN201762344U (en) Mass ejection roller of expansion slag beads
CN206351253U (en) A kind of rapid solidification prepares the device of refining metallic powder
CN108998604B (en) Blast furnace slag granulating and waste heat recovering device
CN115041692B (en) Cooling model verification method of high-temperature metal centrifugal atomization powder making device
CN2546113Y (en) High-speed centrifugal pan type wing atomized magnesium powder production apparatus
CN220413432U (en) Sintering dust and molten steel slag cooperative granulating treatment device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant