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INVENTION
Russian Federation Patent RU2100082
METHOD FOR GRINDING MATERIALS AND DEVICE energy flows vortex grinding FOR ITS IMPLEMENTATION
Name of applicant: Shostak Viktor Vladimirovich [UA]; Mikhail Kulakov Parfenovich [UA]
Name of the inventor: Viktor Shostak [UA]; Mikhail Kulakov Parfenovich [UA]
The name of the patentee: Shostak Viktor Vladimirovich [UA]; Mikhail Kulakov Parfenovich [UA]
Address for correspondence:
Starting date of the patent: 1996.05.14
A method of grinding material and energy flows in the vortex grinding apparatus for its implementation are chemical engineering, food, building and other industries and can be used in jet mills. The method comprises feeding a stream energy carrier cylindrical grinding chamber, the creation of zones of sound and / or ultrasonic vibration to the rotating cross flow in which fluctuations of the second harmonic of the fundamental frequency further enhanced by resonance vibrations, the loading and grinding of the starting material, selection of the obtained powder. The apparatus comprises a cylindrical grinding chamber with the nozzle oriented along the section of its inner surface and likewise oriented cavities, each cavity of the first conjugate with the second lumen at inclined relative to the first. Contain and charging device and an outlet for the powder and energy source. Use of the method and device provide good contact energy source with the source material and thus increase milling purity.
DESCRIPTION OF THE INVENTION
The invention relates to mechanical engineering for the chemical, food, and construction and other industries and can be used in jet mills.
Known grinding method in the flow of energy carrier materials (SU, 1423156, cl. B 02 C 19/06), comprising feeding a grinding chamber of cylindrical energy source, forming it into a jet oriented along a chord, forming a rotating vortex flow grinding and loading starting material, selection of the obtained powder.
Coincides with the essential features of the process flow in a cylindrical grinding chamber of the energy carrier, forming a rotating vortex flow, loading and crushing the raw material, the selection of the resulting powder.
Using the known method does not provide sufficiently good contact energy source with the source material, which reduces the purity of grinding.
Known vortex grinding apparatus (auth. St. 1423156, cl. B 02 C 19/06), including a cylindrical grinding chamber with nozzles oriented along a chord related to the energy source and the distribution manifold inlet, a feed device and an outlet for the powder and energy source .
Coincide with essential features of the proposed device a cylindrical grinding chamber with the nozzle chamber oriented along a chord, which is connected to the inlet, a feed device and an outlet for the powder and energy source.
Using the known device does not provide a sufficiently good contact energy source with the source material, which reduces the purity of grinding.
Known grinding method in the flow of energy carrier materials (SU, 1574270, cl. B 02 C 19/06), chosen as the prototype, comprising feeding a grinding energy carrier cylindrical jet chamber which generates a rotating vortex flow grinding load and of the starting material, Separated by the level of the selection of the obtained powder.
Using the known method does not provide sufficiently good contact energy source with the source material, which reduces the purity of grinding.
A device vortex grinding (avt. communication. 1574270, cl. B 02 C 19/06), chosen as the prototype, comprising a cylindrical grinding chamber with the nozzle oriented along a chord of the cross section of its inside surface, which is connected to the inlet, a charging device and an outlet for the powder and an energy carrier, which is offset upward relative to the hole filling device 0,5 1,5d, where d average diameter of the holes.
Coincide with essential features of the proposed device a cylindrical grinding chamber with the nozzle oriented along a chord of the cross section of its inside surface, which is associated with the inlet, a feed device and an outlet for the powder and energy source.
Using the known device does not provide a sufficiently good contact energy source with the source material, which reduces the purity of grinding.
The aim is to improve the method of grinding materials in the flow of energy, which by changing the grinding conditions provides better contact with an energy source material and thereby increases the purity of grinding.
The aim is to improve the vortex grinding apparatus in which by design changes provide better contact with an energy source material and thereby increases the purity of grinding.
In the method of grinding material in the flow of energy carrier, comprising the supply into the cylindrical grinding energy carrier jet chamber which forms a vortex rotating flow, the loading and grinding of the starting material, the selection of the powder obtained according to the invention grinding of the starting material stimulated by creating zones of sound and / or ultrasonic vibration, transverse to a rotating flow in which fluctuations of the second harmonic of the fundamental frequency are reinforced by additional resonant vibrations.
The device vortex grinding, comprising a cylindrical grinding chamber with the nozzle oriented along a chord of the cross section of its inner surface and connected to the inlet, a feed device and an outlet for the powder and the energy source, according to the invention on the inner surface of the grinding chambers are cavities oriented along a chord of the cross section of its the inner surface of which inclination direction with respect to the radius of the cylindrical surface of the grinding chamber coincides with the direction of inclination of the nozzle, each of the cavities is associated with at second cavity inclined with respect to the first.
Moreover, the natural frequency of acoustic waves of the second cavity lies in the frequency region lower harmonic oscillations of the first natural acoustic cavity.
Taken together, these features of the proposed method provides the disruption of the starting material at the entrance to an energy in the grinding chamber and additionally creates zones of sound and / or ultrasonic vibration, thereby achieving a given technical result, improvement of contact energy source with the source material due to increased contact area, increased turbulence, and and stabilizing the milling process variations in the second cavity.
Taken together, these features of the proposed device ensures the destruction of the starting material to an energy input zone in the grinding chamber, and further close the cavities on the inner surface of the grinding chamber and thereby achieve a technical result, improvement of contact energy source with the source material due to increased contact area, increased turbulence, but also stabilize the fluctuations in the grinding process in the second cavity. This increases the purity of grinding.
Using the proposed method and device for its implementation and provides less contact with the surface of the starting material of the cylindrical mill chamber and milling it in a preferential energy source stream that enhances grinding purity.
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FIG. 1 is a schematic front view of a drawing device, Fig. 2 a top sectional view.
The apparatus comprises a cylindrical grinding chamber 2 to the nozzle 1, oriented along a chord of the inner surface of the chamber section, which is connected to the inlet 3. The loading device 4 is placed on the top cover of the cylindrical grinding chamber 1. The outlet 5 for powder and the energy source is located remote from the nozzle 2 to course of rotation of the vortex flow, indicated by arrow 6. The first chamber 7 on the inner surface of the cylindrical grinding chamber 1 are oriented along a chord section of the inner chamber surface and the direction of inclination relative to the radius of the cylindrical surface of the grinding chamber 1 coincides with the direction of inclination of the nozzle 2. Each of the first cavities 7 is connected with the second lumen at 8 inclined with respect to the first, and the dimensions of the cavities provide the condition in which the natural frequency of acoustic oscillations each second cavity 8 is at the second harmonic frequency range of natural frequencies of the acoustic oscillations of the first cavity mating with its outlet 7. 5 and outlet 9 may be formed in the top or bottom of the cylindrical grinding chamber lid 1.
The proposed method and device for its implementation are implemented as follows.
Through an inlet nozzle 3 and two oriented along a chord of the cross section of the inner chamber surface of a cylindrical grinding chamber of a gas stream fed one energy source that generates a rotating vortex flow exiting through outlet 5.
Near the inlet opening 3 and close the cavities 7 and oriented along a chord section of the inner chamber surface, eddies are formed in a stream. Starting material through the loading device 4 is supplied into the cylinder of the grinding chamber 1 and then in the direction of rotation 6 and crushing zones, the vortices produce a selection of the resulting powder through the outlet 5 and outlet pipe 9.
Grinding the raw material stimulated by creating zones of sound and / or ultrasound, transverse to the rotating flow that occur as a result of reducing the pressure in the smaller second cavity 8 and the first cavity 7, to achieve the phase of unstable equilibrium and then return to its original state.
Fluctuations of the second harmonic of the fundamental frequency in the cavities 7 further enhanced resonance vibrations in the cavities 8, which helps to improve grinding.
Using the proposed method and device energy source feeding a compressed air pressure to 600 kPa, and the resonant frequency of 7 kHz to 42 allowed to carry out grinding of the starting material, such as grain to a particle size 
118 microns.
CLAIM
1. A method of crushing material in an energy flow, comprising supplying a cylindrical grinding chamber of the jet energy source that generates a rotating vortex flow grinding load and of the starting material, selection of the resulting powder, characterized in that the grinding of the starting material by creating zones stimulate sound and / or ultrasound vibrations transverse to the rotating flow in which fluctuations of the second harmonic of the fundamental frequency are reinforced by additional resonant vibrations.
2. The vortex grinding apparatus comprising a cylindrical grinding chamber with the nozzle oriented along a chord of the cross section of its inner surface and connected to the inlet, a charging device and an inlet for the powder and the energy source, characterized in that the inner surface of the cavity formed grinding chamber oriented along chord section of its inner surface whose inclination direction with respect to the radius of the cylindrical surface of the grinding chamber coincides with the direction of inclination of the nozzle, each of the first cavities is associated with the second lumen at inclined to the first.
print version
Publication date 16.12.2006gg
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