Device for continuously processing particles in temperature control dripping mode
Through temperature-controlled drip, spin-pressed leaking material and heat exchange curing technology, the problems of uneven particle size, high processing risk and increased cost in the prior art are solved, and the continuous production of particles with particle size of more than 2mm and adjustable shapes are achieved.
Patent Information
- Application Number
- CN202510167576.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-04-18
AI Technical Summary
When manufacturing particles with a particle size of more than 2 mm, the prior art has problems such as uneven particle size, easy to mix impurities, high risk of processing, and increased cost. At the same time, existing pneumatic spraying methods and disc centrifugal atomization methods are difficult to produce cylindrical particles, and materials are easily condensed and blocked during the rapid cooling and curing process.
The temperature-controlled drip method is adopted to uniformly enter the leaking hole through the spinning leaking device, and heat, dry or cool using the temperature-controlled medium in the heat exchange curing chamber to control the solidification and solidification of the material to form particles. The device can adjust the particle size and shape of the particles, including spherical, spherical and cylindrical shapes.
Continuous production of particles with a particle size of more than 2mm is achieved, and the particle size and shape are adjustable, which avoids the problems of particle inhomogeneity and impurity mixing caused by mechanical crushing, reduces processing risks and reduces production costs.
Smart Images
Figure CN119838500A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a continuous production device for processing molten material or material in a powder and liquid mixed state into particles by means of temperature-controlled dripping, and belongs to the technical field of granulation machinery and equipment. Technical Background
[0002] The existing methods of drying and granulating powder and liquid mixed materials or processing inorganic salts, metals, organic matter and other materials in a molten state into larger particles with a particle size of more than 2 mm are mainly to first cool them into larger blocks and then to process them into particles through mechanical crushing or cutting. The particles produced by crushing are uneven in size, with a large particle size distribution range, and are prone to impurities. Some raw materials are prone to danger due to mechanical impact processing, and secondary processing also increases costs.
[0003] The existing pneumatic spray method and disc centrifugal atomization method for manufacturing particles can produce fine particles of molten inorganic salts, metals, organic matter and other materials, which are basically distributed in the range of 2-150μm. When used to manufacture particles with a particle size of more than 2mm, it is difficult to quickly cool and solidify the particles due to their large volume and weight. There is a problem of condensation and blockage of the material in the atomization equipment. In addition, the particles produced by the pneumatic spray method and disc centrifugal atomization method are all spherical, and cylindrical particles cannot be produced. The pneumatic spray method and disc centrifugal method are used to atomize and manufacture particles for materials in a mixed state of powder and liquid, resulting in excessive dispersion of the materials and failure to form them.
[0004] The existing drip cooling method for making particles is that after the material flows downward through the leakage hole by gravity, a scraper is used to scrape the lower plane outside the bottom plate where the leakage hole is located, and the particle size of the produced particles is changed by adjusting the hole diameter of the leakage hole and the rotation speed of the scraper. The device can only smoothly leak materials when the material is molten at high temperature or the material is in a state of powder and liquid mixture with low viscosity, and the energy consumption is high; the droplets are broken after being collided by the scraper, the particle size of the produced particles cannot be controlled, and the shape of the particles cannot be adjusted. Summary of the invention
[0005] This invention is a device that uses dripping temperature control to continuously process molten materials or powder and liquid mixed materials into larger particles. The molten materials or powder and liquid mixed materials are continuously transported into the device, and the device controls the temperature and quantity of the materials flowing through the leakage hole to become droplets. The materials are then heated, dried, or cooled through temperature control and heat exchange to solidify and solidify into particles, which are collected after particle size classification. The processed particles have a particle size of more than 2 mm. The device can adjust the particle size of the generated particles, and can adjust the particle shape to spherical, quasi-spherical or cylindrical. The device consists of three parts: spinning leakage, heat exchange solidification, and particle collection.
[0006] The spinning leakage part is composed of a spinning leakage device (1), a temperature controller (7), and a leakage thermometer (15). The spinning leakage device (1) is cylindrical, with a cover plate (8) on the top, a feed pipe (5) on the side, and a leakage hole (2) on the bottom plate of the cylinder. A rotating shaft (4) with a spinning plate (3) is inserted into the cylinder, and the rotating shaft (4) is located in the middle of the cylinder and perpendicular to the bottom plate. A scraper (6) is provided at the bottom of the spinning plate (3) on the side away from the rotation direction to tightly press the inner surface of the bottom plate of the cylinder in the horizontal plane. The spinning plate (3) in the spinning leakage device (1) can be one or more. If there are multiple spinning plates, the angles between the spinning plates (3) are equal; when each spinning plate (3) runs one circle, the area swept by the scraper (6) at the bottom covers all the leakage holes (2) on the bottom surface of the cylinder. The spinning plate (3) is inclined in the direction of rotation on the vertical surface, and generates and maintains a balanced downward pressure on the material during the rotation process, so that the material is pressed evenly into the leakage hole (2), and the scraper of the spinning plate (3) presses the leakage hole (2) to stop the leakage. The temperature controller (7) is arranged around the cylinder of the spinning leakage device (1) to heat and cool the material in the spinning leakage device (1). The leakage thermometer (15) probe is connected to the bottom plate of the cylinder with the leakage hole (2) to measure the temperature of the material passing through the leakage hole (2).
[0007] The heat exchange curing part is composed of a heat exchange curing chamber (9), a heat exchange medium pipeline (10), a heat exchanger (11), and a power machine (12) for conveying the medium, such as a fan or a pump. The heat exchanger (11) heats up or cools down the heat exchange medium entering the medium pipeline (10), and then the power machine (12) conveys the heat exchange medium into the heat exchange curing chamber (9) through the medium pipeline (10). The material dripped into the heat exchange curing chamber (9) through the leakage hole (2) is cooled, heated, or dried by the heat exchange medium to become particles. The heat exchange medium is liquid or gas.
[0008] The particle collection part is composed of a discharge pipe (13) and a collection chamber (14) of the heat exchange curing chamber. The material that becomes solid particles in the heat exchange curing chamber (9) is brought into the collection chamber (14) by the heat exchange medium through the discharge pipe (13). The outlet of the discharge pipe (13) is opposite to the outlet of the medium pipeline (10), and its outlet diameter is larger than the outlet diameter of the medium pipeline (10), and its upper edge is lower than the upper edge of the outlet of the medium pipeline (10). The collection chamber has gas and liquid outlets to keep the heat exchange medium flowing from the heat exchange curing chamber (9) to the collection chamber (14).
[0009] The molten material or the material in the mixed state of powder and liquid passes through the leakage hole and interrupts to become droplets, and then cools and solidifies after heat exchange, or heats and solidifies, or dries and deliquidates and solidifies to become particles. The particle size of the prepared material particles is adjusted by adjusting the aperture of the leakage hole, the rotation speed of the spinning plate, the inclination angle of the spinning plate, and the temperature of the temperature controller. The volume of the material dripping from different leakage holes is different. When the rotation speed and inclination angle of the spinning plate are fixed, the size of the particles can be adjusted by changing the aperture of different leakage holes. When the aperture of the leakage hole and the inclination angle of the spinning plate are fixed, the size of the particles can be adjusted by adjusting the rotation speed of the spinning plate and the volume of the material dripping from the leakage hole. The faster the speed, the smaller the volume of the material dripping each time, and the smaller the prepared particles. When the leakage hole and the rotation speed of the spinning plate are fixed, the size of the particles can be adjusted by adjusting the downward pressure inclination angle of the spinning plate in the rotation direction and the volume of the material dripping through the leakage hole. The smaller the inclination angle, the greater the downward pressure on the material rotation, the larger the volume of the material dripping each time, and the larger the prepared particles. By adjusting the temperature of the thermostat, the viscosity of the material in the spinning leaking device can be changed, and the prepared material particles can be adjusted to be spherical or cylindrical. The smaller the viscosity, the closer to the sphere. By adjusting the heat exchange temperature of the heat exchanger, the solidification speed of the dripping material can be changed.
[0010] The operating method of the device of the present invention for preparing particles is: start the power to drive the rotating shaft and the spinning plate to rotate in the cylinder, start the heat exchanger and the power machinery, the heat exchange medium flows into the device, and the material receiving valve on the upper part of the receiving tank is opened. The material enters the cylinder of the spinning leakage device through the feed pipe, and the temperature controller is adjusted to increase or decrease the temperature of the material in the cylinder. By observing the leakage thermometer, it is determined that the material has reached a state suitable for drip granulation to control the size and shape. During the operation, the material passes through the downward pressure of the spinning plate during the rotation process, enters the leakage hole of the bottom plate of the cylinder, and the material is interrupted by the scraper to transport the material. The material that has entered the leakage hole drips into the lower heat exchange curing chamber, contacts with the heat exchange medium for heat exchange, and solidifies or dries the material into particles. The material particles are brought into the collection chamber by the heat exchange medium through the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Attached Figure 1 Device composition diagram
[0012] Attached Figure 2 Spinning leaker diagram
[0013] Specific implementation cases
[0014] Example 1: Aluminum silver zinc powder and solvent mixed slurry processed into cylindrical particles with a diameter of more than 4 mm
[0015] 1. Select a spinning leaker with a leak hole diameter of more than 4mm, nitrogen as the heat exchange medium, and a fan as the power machine.
[0016] 2. Start the power to drive the rotating shaft and the spinning plate to rotate in the cylinder, start the heat exchanger and the fan, and raise the temperature of the nitrogen entering the heat exchange curing chamber to 80°C. After heating, the nitrogen is input into the heat exchange curing chamber, the discharge pipe, and the collection chamber through the medium pipeline.
[0017] 3. Start the temperature controller to keep the cylinder warm, and let the aluminum-silver-zinc and solvent mixed slurry enter the cylinder of the spinning leaker through the feed pipe. The leakage thermometer observes the viscosity of the mixed slurry when it passes through the leakage hole and maintains 30°C.
[0018] 4. The aluminum-silver-zinc powder and solvent mixed slurry enters the leakage hole of the cylinder bottom plate through the downward pressure of the spinning plate, and is then interrupted and transported by the scraper of the spinning plate belt. The high-viscosity aluminum liquid that enters the leakage hole falls into the heat exchange and curing chamber in the form of a short small cylinder, and the solvent evaporates after heat exchange with 80°C nitrogen, and the powder dries, condenses and solidifies into cylindrical aluminum particles. The aluminum-silver-zinc powder and solvent mixed slurry repeatedly leaks, interrupts and heat exchanges the solvent to evaporate in the leakage hole, continuously producing cylindrical aluminum-silver-zinc mixed particles.
[0019] 5. The solidified cylindrical aluminum-silver-zinc mixed particles are blown into the discharge pipe by the nitrogen flow and collected in the collection chamber.
[0020] Example 2: Processing of electrolytic aluminum refining agent into spherical particles with a particle size of >2 mm
[0021] 1. Select a spinning leaker with a leak hole diameter of 2mm, the heat exchange medium is air, and the input power machine is a fan.
[0022] 2. Start the power to drive the rotating shaft and the spinning plate to rotate in the cylinder, and adjust the temperature controller to control the temperature. Start the heat exchanger and the fan to reduce the temperature of the dry air entering the heat exchange curing chamber to 0℃, and flow through the heat exchange curing chamber, the discharge pipe, and the collection chamber.
[0023] 3. The electrolytic aluminum refining agent composed of a molten inorganic salt mixture enters the cylinder of the spinning leaking device through the feed pipe. The temperature controller adjusts the temperature of the refining agent in the cylinder so that the refining agent passing through the leaking hole remains in a molten state of about 600°C as observed by the leaking thermometer.
[0024] 4. The molten electrolytic aluminum refining agent enters the leakage hole of the bottom plate of the cylinder through the downward pressure of the spinning plate, and is then interrupted and transported by the scraper of the spinning plate. The electrolytic aluminum refining agent entering the leakage hole drops into the heat exchange and curing chamber in the form of droplets, exchanges heat with the dry air at 0°C, and then cools and solidifies into spherical particles with a diameter of more than 2mm.
[0025] 5. The solidified refining agent particles are blown into the discharge pipe by the nitrogen flow and collected in the collection chamber.
[0026] Example 3 Tin alloy processed into solder balls with a particle size of 2.4 mm
[0027] 1. Select a spinning leaker with a leak hole diameter of 2.1mm, the heat exchange medium is lubricating oil, and the input power machinery is a pump.
[0028] 2. Start the power to drive the rotating shaft and the spinning plate to rotate in the cylinder, and adjust the temperature controller to control the temperature. Start the heat exchanger and pump to reduce the temperature of the lubricating oil entering the heat exchange curing chamber to 9°C, and then flow into the heat exchange curing chamber and the rear-end equipment of the device through the medium pipeline.
[0029] 2. The molten tin alloy is fed into the cylinder of the spinning leaker through the feed pipe. The temperature controller adjusts the temperature of the tin alloy liquid in the cylinder so that the tin alloy liquid passing through the leaking hole is kept at a molten state of about 190°C as observed by the leaking thermometer. The diameter of the spherical droplet caused by its surface tension is 0.4mm larger than the diameter of the leaking hole (2.1mm).
[0030] 3. The molten tin alloy liquid passes through the downward pressure of the spinning plate and enters the leakage hole of the bottom plate of the cylinder, and then is interrupted by the scraper of the spinning plate. The tin alloy liquid entering the leakage hole falls into the heat exchange and curing chamber in the form of spherical droplets with a diameter of 2.5 mm. After heat exchange with the 9°C lubricating oil, it is cooled and solidified into spherical particles. Because the volume shrinks slightly after cooling, a solder ball with a diameter of 2.4 mm is made.
[0031] 4. The solder balls are collected along with the lubricating oil through the discharge pipe into the collection chamber.
Claims
1. A device for continuously processing particles by temperature-controlled dripping, characterized in that After the molten material or the mixed material of powder and liquid is dripped by temperature control, it is solidified by temperature control heat exchange and prepared into particles. After particle size classification, it is collected. The particle size of the generated particles can be adjusted, and the particle shape can be adjusted to be spherical, quasi-spherical or cylindrical. The particle size of the processed particles is above 2mm. The device consists of three parts: spinning leakage, heat exchange solidification, and particle collection: (1) The spinning leakage part is composed of a spinning leakage device, a temperature controller, and a leakage thermometer. The spinning leakage device is a cylinder with a cover plate on the top, a feed pipe on the side, and a leakage hole on the bottom plate of the cylinder. A rotating shaft with a spinning plate is inserted into the cylinder, and the rotating shaft is located in the middle of the cylinder and perpendicular to the center of the bottom plate; the temperature controller is arranged around the outside of the cylinder of the spinning leakage device to heat and cool the material in the spinning leakage device; the leakage thermometer probe is connected to the bottom plate of the cylinder with the leakage hole to measure the temperature of the material passing through the leakage hole; (2) The heat exchange and curing part consists of a heat exchange and curing chamber, a medium pipeline, a heat exchanger and a power machine; (3) The particle collection part consists of a discharge pipe and a collection chamber.
2. The device for continuous processing of particles by temperature-controlled dripping method according to claim 1, characterized in that There are one or more spinning plates in the spinning leakage device. If there are multiple spinning plates, the angles between the spinning plates are equal. There is a scraper on the bottom of the spinning plate on the side away from the rotation direction. The scraper presses tightly against the inner surface of the cylindrical bottom plate in the horizontal plane. The area swept by the scraper as the spinning plate moves covers all the leakage holes of the cylindrical bottom plate. The spinning plate is inclined in the direction of rotation on the vertical plane, and a balanced downward pressure is generated and maintained on the material during the rotation process, so that the material is pressed evenly into the leakage hole; the scraper presses the leakage hole to stop the material from entering the leakage hole.
3. The device for continuously processing particles by temperature-controlled dripping according to claim 1, characterized in that The outlet pipe opening of the heat exchange curing chamber is opposite to the medium pipe opening, the outlet pipe opening diameter is larger than the medium pipe opening diameter, and the upper edge of the outlet pipe opening is lower than the upper edge of the medium pipe opening.
4. The device for continuous processing of particles by temperature-controlled dripping method according to claim 1, characterized in that The particle size of the prepared material can be adjusted by adjusting the diameter of the leakage hole, the rotation speed of the spinning plate, the inclination angle of the spinning plate and the temperature of the temperature controller.
5. The device for continuously processing particles by temperature-controlled dripping method according to claim 1, characterized in that The viscosity of the material in the spinning leaking device is changed by adjusting the temperature of the thermostat, and the shape of the prepared particles is adjusted.