KR100734620B1 - classification unit and classification system utilizing the same - Google Patents

Abstract

According to the present invention, a housing having a plurality of air inlets formed on an outer circumferential surface of a classification unit, a lower hopper installed at a lower portion of the housing to collect relatively large particles, and a cover member installed at an upper portion of the housing are provided. A first floating impeller rotated by the first driving unit installed in the cover member, the second floating impeller rotating by the second driving unit installed in the lower hopper and surrounding the first floating impeller, and the cover A classifying inlet and a classifying outlet are provided in the member.

Ultrafine, Classified, Separated

Description

Classification unit and classification system utilizing the same

1 is a side view showing a classification unit and a classification apparatus using the same according to the present invention;

2 is a cross-sectional view of the classification unit shown in FIG.

3 is an exploded perspective view of the classification unit shown in FIG. 1.

4 is a graph showing volume and particle size.

The present invention relates to a classification apparatus, and more particularly, to a classification unit capable of producing ultra-micron powder and a classification apparatus using the same.

In general, classification refers to the separation of solids according to chemical composition, particle diameter, shape, color, density, radioactivity, magnetic and electrostatic properties, and the classifiers for the separation of solids include cement, ceramic raw material and powder. In the powder grinding process of chemicals or foods, sludge, and electro-mineral materials, the raw materials crushed to a certain particle size are supplied, and the fine powder having a certain particle size is selected. To sort.

This classification is solved relatively simply in the powder having a large particle size, but in the case of fine or ultra fine powder, there are many technically difficult problems in obtaining a fine particle of a desired particle size applied to a purpose of use by a grinder or a screen.

That is, it is necessary to remove the paint larger than a predetermined particle size in order to improve the quality and to uniform the mixing. In addition, the filter media powder has a finer granularity such as an active plate for adsorption or a quartz powder for polishing, if it contains finer particles than necessary, and thus it may interfere with the filtration structure. It becomes an important cause and requires adjustment of the particle size.

Thus, classification adjustment is necessary to obtain a product having a particle size or particle size distribution that meets the requirements. The ultra-micron classifier is a mechanical centrifugal assisted classifier that has been completed by basic research and applied research in response to their demands, and can effectively separate the classification of difficult fine powder by screen.

On the other hand, the pulverizer for crushing such ultrafine particles include a jet crusher (cone crusher), hammer crusher (shredder) hammer mill, roll crusher and the like.

The micro classifier is to separate the raw materials pulverized by the pulverizer as described above to a desired particle size, and in constructing the rotor in Korean Utility Model Registration No. 222819, a plurality of cages are arranged on concentric circles about the axis of the motor. In the cage, a classifier is provided that connects the feed pipes to collect the fine powder by varying the slit linear velocity of each cage while collecting the fine powder having different particle sizes for each cage.

These classifiers can exert great effect in small classifiers, but when classifying a large classifier, the size of the rotor had to be large. Therefore, the classification efficiency was poor and the superfine classifier was not properly performed. This is due to the structural problem of the classifier itself when standing in the direction. In general, in the classifier that employs the vertical rotor, the structure of the classifier part including the rotor is very complicated and narrow, and there is a limit in throughput and classification of raw materials. In order to solve such a problem, when the entire apparatus is enlarged, it is obvious that the manufacturing cost is increased, the place of application is limited, and the transportation and installation are difficult.

Patent No. 10-003987 discloses an air classifier. The disclosed classifier discloses a technical configuration in which ultrafine particles are pulverized from a pulverized material by using a centrifugal force field by swinging the fine particles into air.

In addition, Korean Patent No. 10-0228922 discloses a cyclone electrostatic separator, and Patent No. 10-0046364 discloses an ultrafine metal ultrafine powder production method.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a classification unit capable of separating a desired particle size from a pulverized raw material and enabling production of products using ultra-precision micron powder.

Another object of the present invention is to provide a classification apparatus using a classification unit that can simplify the manufacturing process of the ultra fine powder and improve its productivity.

In order to achieve the above object, the classification unit of the present invention,

A housing having a plurality of air inlets formed on an outer circumferential surface thereof, a lower hopper installed at a lower portion of the housing to collect relatively large particles, and a cover member installed at an upper portion of the housing,

A first floating impeller which is installed inside the housing and is rotated by a first driving unit installed in the cover member;

A second floating impeller which is rotated by a second driving unit installed in the lower hopper and surrounds the first floating impeller;

It is characterized in that it is provided with a classification input port and the classification discharge port provided in the cover member.

In the present invention, the upper side of the first floating impeller connects the impeller and a relatively narrow guide member is installed, the guide vanes may be formed on the side adjacent to the lower surface of the second floating impeller. The first blade of the first floating impeller is formed in a radial direction, and the second blade of the second floating impeller has a structure inclined at a predetermined angle with respect to the radial direction.

Classification apparatus according to the present invention for achieving the above object,

A housing having a plurality of air inlets formed on an outer circumferential surface thereof, a lower hopper installed at a lower portion of the housing to collect relatively large particles, and a cover member installed at an upper portion of the housing, and being installed inside the housing. A first floating impeller rotated by the first driving unit installed on the cover member, a second floating impeller rotating by the second driving unit installed on the lower hopper and surrounding the first floating impeller, and a classification injection hole installed on the cover member. And a classifier unit having an outlet;

Raw material input means for supplying pulverized fine particles to the classification input port of the classifier unit;

A cyclone unit for separating the binary particle group separated from the classifier unit secondly;

A dust collecting unit for collecting ultra-fine particles separated from the cyclone unit; and a blower unit connected to the dust collecting unit so that raw materials can flow smoothly from the classification unit to the dust collector unit.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The classification apparatus according to the present invention is capable of separating ultrafine particles from the finely divided fine particles by a mill, as shown in Figs. 1 to 3, the classification unit for separating the finely divided fine particles by a grinder (not shown) first (20), and a raw material input unit 40 for supplying pulverized fine particles to the classification input port 28 of the classification unit 20; A cyclone unit (50) for separating the particle group separated from the classification unit (20) using the principle of cyclone; A dust collecting unit 60 for collecting super fine particles separated from the cyclone unit; It is connected to the dust collection unit and includes a blower unit 70 for transferring the raw material from the branch unit of the raw material to the dust collector unit.

Referring to the classification device according to the present invention configured as described above in detail as follows.

First, the classification unit 20 includes a housing 22 in which a plurality of air inlets 21 are radially formed on an outer circumferential surface as shown in FIGS. 1 to 3. The housing 22 is formed in the shape of a cylinder having an opening having a flange portion at the upper and lower edges thereof. A lower hopper 23 for collecting relatively large particles is installed on the lower side of the housing 22, and a cover member 24, which is a bearing housing, is installed on the upper side of the housing 22.

On the other hand, it is installed in the housing 22, and is provided on the first rotating shaft (25a) supported by the cover member 24 and provided with a first floating impeller 26 driven by the first driving unit 25 do. The lower hopper 23 is supported by a second rotating shaft 27d driven by a second driving unit (not shown), and the second floating impeller 27 surrounding the first floating impeller 26 is provided. Equipped. Here, the upper side of the first floating impeller 26 is provided with a first guide member 26b that connects the first floating impeller 26 and becomes relatively narrow, and the second floating impeller 27 is provided. The guide vane 27c may be formed at the lower surface side so as not to contact each other. The first blade 26c installed on the first rotating member 26a of the first floating impeller 26 is formed in a radial direction, and is connected to the second rotating member 27a of the second floating impeller 27. The installed second blade 27b has a structure inclined at a predetermined angle with respect to the radial direction.

The cover member 24 is provided with a classification input port 28 and a classification discharge port 29, and the classification input port 28 is connected to the raw material input unit 40. This raw material input unit 40 includes a part feeder 42 having a hopper 41. 2 and 3, the first and second guide members 26e and 27e which are not in contact with each other are disposed on the lower surface side of the first floating impeller 26 and the lower surface side of the second floating impeller 27. Installed
In addition, the classification discharge port 29 installed in the cover member 24 secondaryly separates the fine particles separated by the first and second floating impellers 26 and 27, that is, the fine particle group separated from the classification unit 20. The cyclone unit 50 is connected to the cyclone unit 50, which is connected to the dust collecting unit 60 for collecting the ultra-fine particles separated.

Here, the dust collecting unit 60 is further provided with a blower unit to smoothly flow the raw material from the classification unit to the dust collector, and the classification unit 20 and the cyclone unit 50 and the dust collecting unit 60 On the lower end side, part feeders 90 may be installed for resupplying relatively large powder to the grinder.

In the classification apparatus 10 configured as described above, the raw material supplied from the raw material input means 40 is supplied through the classification input port 28. As the raw material supplied as described above is rotated by the first and second floating impellers 26 and 27, the first floating impeller 26 floats the raw material introduced into the classification inlet 28 toward the second floating impeller 27. Given. At this time, since the first floating impeller 26 has a relatively large contact with the raw material, it is preferable to make the wear resistance large and relatively thick.

In this state, the fine particles and air suspended by the second floating impeller 27 are ejected toward the classification discharge port 29. The ultra fine particles thus ejected are stored in the dust storage tank by separating the ultra fine particles according to the principle of the cyclone.

As described above, the classifier device according to the present invention can further classify the particles and freely classify the powder into 20 µm or less, and maintain the size of the classified particle size constantly. In addition, the device is easy to disassemble and assemble and easy to clean.

Figure 4 is a graph showing the experimental results of the particle size of the cyclone guide and dust collector while adjusting the number of revolutions and the supply internal pressure of the first and second floating impeller.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (4)

A housing having a plurality of air inlets formed on an outer circumferential surface thereof, a lower hopper installed at a lower portion of the housing to collect relatively large particles, and a cover member installed at an upper portion of the housing, A first floating impeller installed in the housing and rotated by a first driving unit installed in the cover member; A second floating impeller which is rotated by a second driving unit installed in the lower hopper and surrounds the first floating impeller; A classification unit, characterized in that provided with a classification inlet and the classification discharge port is installed in the cover member. The method of claim 1, The upper side of the first floating impeller is connected to the impeller is installed a relatively narrow width guide, And a first guide member and a second guide member which are not in contact with each other on the lower surface side of the first floating impeller and the lower surface side of the second floating impeller. The method of claim 1, And a first blade of the first floating impeller is formed in a radial direction, and the second blade of the second floating impeller has a structure inclined at a predetermined angle with respect to the radial direction. delete

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