WO2010058914A2

WO2010058914A2 - Apparatus for producing zinc flake

Info

Publication number: WO2010058914A2
Application number: PCT/KR2009/006349
Authority: WO
Inventors: 이희동; 한규성; 정헌석; 강동진; 신하식; 안우영; 김병기; 황병웅
Original assignee: 티엔씨(주)
Priority date: 2008-11-19
Filing date: 2009-10-30
Publication date: 2010-05-27
Also published as: CN102216005B; CN102216005A; KR100901018B1; WO2010058914A3; JP2012509395A

Abstract

The present invention relates to an apparatus for producing zinc flake, in which a holding tank for supplying spherical zinc powder mixture materials and a ball mill are interconnected via an inlet line and an outlet line to flake the spherical zinc powder while circulating the mixture materials introduced in the holding tank. Particularly, as the present invention employs a complex ball mill having an inner cylinder constituted by a plurality of disks stacked into layers, zinc flake with superior quality is obtained to minimize porosity, protective effects against elements which might cause a corrosion can be increased, and the specific surface area of the zinc flake is increased to improve performance of corrosion-protective pigment. Further, the present invention adopts a continuous preparation process to shorten preparation time, thus improving productivity and yield rate, and allowing the commercial utilization thereof.

Description

Flakes Zinc Manufacturing Equipment

The present invention relates to an apparatus for producing flake zinc, and more particularly, to flake a spherical zinc powder using a flake composite ball milling, so that the degree of flaky zinc is excellent and the porosity is increased. It is possible to improve the anti-corrosive pigment performance by increasing the blocking effect of corrosion factors and increase the specific surface area by minimizing the corrosion resistance, and to provide a high-yield commercial application of flake zinc characterized in that the commercial application is possible. .

In general, zinc powder acts as a sacrificial anode which is contained in the paint and corrodes before iron, thereby preventing corrosion of an object to be protected. Zinc powder as a conventional anticorrosive pigment forms a particle size distribution of 1 ~ 10㎛ and uses a gloss-shaped globular gray powder, the conventional spherical zinc powder is deteriorated anticorrosive performance due to the large porosity formed when used in anticorrosive pigments There was a problem.

On the other hand, the metal flake (flake) is a thin and flat structure of the metal particles, such as spherical shape, because the structure as described above to produce a high gloss visual effect and increase the specific surface area, so that milling the pigment particles of the spherical shape (milling) There are various attempts to flake by law.

Therefore, various methods have been tried to flake spherical zinc powder by using a milling method to solve the above problems of the zinc powder, as shown in Figure 1, zirconia, When spherical zinc powder is put into a ball milling having a structure of a cylindrical container 1 filled with a certain amount of wear-resistant balls 3 such as alumina, and rotated in the direction of the arrow to flakeIsProcess control is easy, but due to the characteristics of zinc, ie brittleness and ductility, the working time is increased and commercially available among actual products There was a problem that the yield of flake zinc is very low.

As shown in FIG. 2, a spherical zinc powder is formed in an attrition milling having a structure of a cylindrical container 1 filled with a predetermined amount of abrasion resistant balls 3 such as zirconia and alumina. The rotation of the stirring blade and moving the ball in the circumferential direction in the container to give a big impact to the raw material powder to shorten the production time, the energy is greater than the ball milling, but the problem of reproducibility of the product It has a problem that the raw material particles are agglomerated during milling (milling) to increase the production cost due to the generation of losses (loss).

That is, the above methods are a method for increasing the grinding efficiency by giving a large impact to the raw powder by moving the ball in the circumferential direction in the rotating container in the spherical zinc powder, flake zinc through the conventional method as described above There were many problems in the process.

In addition, a method of manufacturing zinc flakes by dry milling is known from PCT Patent Publication No. WO2004 / 026508, but in the case of the patent, heat is generated during milling, which causes a large amount of raw material consumption and a high risk of dust. There was a problem that was difficult to do.

Therefore, the present invention is to solve the above problems, spherical zinc powder, solvent and lubricant by using a new type of flake zinc manufacturing complex ball mill (Complex Ball Milling) that can improve the production yield and yield of flake zinc It is an object of the present invention to provide an apparatus for producing flake zinc, characterized in that to produce flake zinc by stirring the mixed raw material at a high speed to shorten the production time and increase the production yield.

In the present invention, flake zinc is prepared using spherical zinc powder particles, so that the specific surface area of flake zinc is increased to minimize the large porosity generated in the case of spherical zinc powder, and to increase the blocking effect of corrosion factors and increase the specific surface area. Another object of the present invention is to provide an apparatus for producing flake zinc, which is characterized by high performance of anticorrosive pigments by expansion of anticorrosive performance.

In order to achieve the above object, the present invention provides a flake zinc manufacturing apparatus for forming flake zinc, wherein the flake zinc manufacturing apparatus 10 is a holding tank 12, a circulation pump 14 and a compound ball mill. 20, and the composite ball mill 20 is connected to the holding tank 12, the inlet line 13 and the outlet line 15 while circulating the mixed raw material flowing into the holding tank 12 while spherical zinc Allowing the process to flake powder to proceed; The composite ball mill 20 is located in the inner cylinder (31) and the inner space 31 of the outer cylinder (30) is formed to accommodate the mixed raw material supplied from the holding tank 12, the external motor It is to provide a flake zinc manufacturing apparatus, characterized in that it has a rotor (50) driven by the ball, the ball is a wear-resistant ball is filled in the inner space 31 to flake the spherical zinc powder It is a problem solving means.

As described above, by developing a method for flake-forming spherical zinc particles by using a flake complex ball milling apparatus, which is a flake zinc manufacturing apparatus according to the present invention, the degree of flaky zinc is excellent and the porosity is improved. Minimize the corrosion protection factor and increase the anticorrosive performance by increasing the specific surface area to increase the performance of anticorrosive pigments, and reduce the manufacturing time by the continuous manufacturing process to increase production and improve production yield. It is expected to be available.

1 (a), (b) is a schematic view of a conventional ball mill,

2 is a schematic diagram of a conventional art light,

Figure 3 is a schematic diagram of the flake zinc production apparatus according to a preferred embodiment of the present invention,

Figure 4 is a schematic cross-sectional view for explaining the composite ball mill in detail in FIG.

5 is a perspective view for explaining the inner cylinder in detail in FIG.

6 is a graph showing a change in yield of the flake zinc prepared by the method of Examples 1 and 2 according to the present invention over time;

7 is a graph showing a change in yield over time of the flake zinc prepared by the method of Comparative Examples 1 to 3 compared to Examples 1 and 2,

8 and 9 are SEM photographs of the zinc flakes prepared according to the method of Examples 1 and 2 according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail. It should be noted that in the following description, only parts necessary for understanding the manufacturing method of the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

First, the technical concept of the apparatus for manufacturing flake zinc according to the present invention will be described in detail with reference to FIG. 3.

Figure 3 is a schematic diagram of a flake zinc manufacturing apparatus according to a preferred embodiment of the present invention, Figure 4 is a schematic cross-sectional view for explaining in detail the composite ball mill in Figure 3, Figure 5 is a perspective view for explaining the inner cylinder in Figure 4 in detail to be.

3 and 4, the flake zinc manufacturing apparatus 10 according to a preferred embodiment of the present invention includes a holding tank 12 (holding tank), the circulation pump 14 and the compound ball mill 20, and The composite ball mill 20 is connected to the holding tank 12 and the inlet line 13 and the outlet line 15 to circulate the mixed raw material flowing into the holding tank 12 to flake the spherical zinc powder. Characterized in that.

At this time, the holding tank 12 receives the raw materials of the spherical zinc powder, the solvent and the lubricant to form the flake zinc from the outside to produce a mixed raw material using a stirrer, this di-mixture is introduced by the circulation pump 14 It is supplied to the holding tank 12 through the line 13. The holding tank 12 is installed around the cooling jacket (cooling jacket (not shown)), it is possible to maintain the stirring and temperature by installing a stirring device.

In addition, the composite ball mill 20, as shown in Figure 4, similar to the conventional ball mill, the outer cylinder 30 is formed with an inner space 31 for receiving the mixed raw material supplied from the holding tank 12, and It has a rotor 50 located in the inner space 31 of the outer cylinder 30 and driven by an external motor. In the composite ball mill 20, a ball having a high wear resistance is filled to flake the spherical zinc powder.

The outlet line 15 of the flake zinc manufacturing apparatus 10 according to the present invention is provided with a condenser 16 to prevent the temperature rise of the mixed raw material circulated from the compound ball mill 20 to the holding tank 12.

The ball filled in the composite ball mill 20 is made of zirconia and alumina having high abrasion resistance. The ball is spherical or rod-shaped, and has a ball size of 0.1 to 5.0 mm, and the filling rate of the ball is filled. It is preferable to fill 20 to 80% by volume with respect to the volume of the space (inner space formed by the inner diameter of the inner cylinder, see FIG. 4).

When the filling rate of the ball is less than 20% by volume, there is a fear that the filling amount of the ball is small so that the Flake may not proceed, and when it exceeds 80% by volume, the operation may be stopped due to blockage.

Such a flake zinc manufacturing apparatus 10 according to the present invention by the flakes of the spherical zinc powder through a specially designed composite ball mill 20, the ball for flake zincation (ball milling) like a conventional ball mill (ball milling) ball to be applied, and to increase the speed of rotation like attrition milling, the degree of flattening of flake zinc is excellent, minimizes the porosity, increases the blocking effect of corrosion factor and specific surface area. It is characterized by the high performance of the anticorrosive pigments by the expansion of the anticorrosive performance according to the increase.

4 and 5, the composite ball mill 20 of the flake zinc manufacturing apparatus 10 according to a preferred embodiment of the present invention is the inlet 32 and the discharge line connected to the inlet line (13, see Fig. 3) The ball is disposed in the inner space 31 of the outer cylinder 30 and disposed around the rotor 50 in the outer cylinder 30 formed of an outlet 34 connected to (15, FIG. 3). It is characterized by comprising an inner cylinder 40 located therein. At this time, the inner cylinder 40 has an outer diameter smaller than the inner diameter of the outer cylinder 30, and consists of a plurality of circular disks 41 formed to have an inner diameter larger than the outer diameter of the rotor 50 located in the inner space 31. In addition, the circular disk 41 has a form of a multi-layered stacked structure by being supported by the supporting bar 60 which is arranged at regular intervals in parallel with the inflow line 13 and coupled to the outer cylinder 30, and has a circular disk 41. The gap holder 62 is installed in the circumferential direction so that the mixed raw material flowing into the inner cylinder 40 flows into the outflow line 15.

In the present invention, the number of the circular disks 41 is a multi-layered structure in which 10 to 100 circular disks are stacked in several layers. The number of circular disks 41 is not necessarily limited to the range of the number, and the number of the circular disks 41 may be appropriately adjusted according to the size of the inner cylinder 40. Can be.

The inner cylinder 40 made of the circular disk 41 of such a multilayer structure has a high frictional force between the mixed raw material, the ball (not shown), and the rotor 50, while zinc is condensed on the inner wall of the outer cylinder 30 so as not to stick. Allow it to cycle through That is, the rotation of the rotor 50 causes friction between the mixed raw material and the ball and proceeds to flake formation. At this time, the gap between the inner cylinder 40 (installed between the circular disks 41) before the generation of frictional heat and aggregation between particles occurs. The gap formed between the gap holders 62 to be flaked out. Repeating this process several times, the flakes proceed and the particle size distribution is measured to stop the process and recover the flake zinc when the target particle size is reached.

At this time, the outer cylinder 30 is horizontal with respect to the rotation axis of the rotor 50 to minimize the vibration generated by rotating the rotor 50 connected to the rotating shaft, the inlet 32 into which the internal pressure and the mixed raw material in the outer cylinder 30 is introduced. By maintaining a constant external pressure of the) is made of a structure to prevent damage to the outer cylinder 30 and the rotating shaft. An inner cylinder 40 as described above is installed in the inner space 31 of the outer cylinder 30 to separate the flake zinc into the outlet 34. Then, when the mixed raw material (mixed raw material of the flake zincation process in progress) flowing out to the outlet 34 through the inner cylinder 40 is transferred to the holding tank 12 through the outflow line 15, the outflow line 15 is placed on the outflow line 15. Installed in the is cooled through the condenser 16. This cycle stops when the particle size distribution of the mixed raw material is measured in the range of 10-50 μm. The working time for which fully flattening depends on the amount of raw materials and the speed of rotation.

Hereinafter, a method of flake-forming a spherical zinc powder using a flake complex composite ball mill (flake complexing mill) according to the present invention is as follows.

The present invention is 30 to 90% by weight solvent, 10 to 70% by weight of the spherical zinc powder, and 100 to 100 parts by weight of the spherical zinc powder by using a flake complex ball mill (complex ball milling) is a zinc manufacturing apparatus 0.01 to 10.0 After mixing the weight portion mixed in the holding tank 12 into the composite ball mill 20 container through the inlet line 13, the rotor 50 is rotated for 10 to 360 minutes at a speed of 100 ~ 8,000 rpm 10 It provides a method for producing flake zinc, characterized in that for producing a zinc flake having a particle size distribution of ~ 50um.

And the mixed raw material is introduced into the compound ball mill 20 to improve the flaking workability and then circulated to the holding tank 12 through the outlet line 15 so that the circulation rate of the mixed raw material is 5 to 30% by volume. It is characterized in that the flake working process proceeds. In the above, when the circulation rate of the mixed raw material is out of the circulation rate range, there is a fear that the flaking workability is deteriorated.

In the present invention, the mixed raw material is preferably 30 to 90% by weight of solvent, 10 to 70% by weight of spherical zinc powder, and 0.01 to 10.0 parts by weight of lubricant based on 100 parts by weight of the spherical zinc powder.

In the present invention, the solvent imparted fluidity to the spherical zinc powder during the flake operation, thereby smoothly supplying the mixed raw material from the inlet line to the inside of the compound ball mill, and the solvent easily with the fluidity during the flake operation of the spherical zinc powder in the compound ball mill. When the amount of the solvent is less than 30% by weight, the flow rate of the spherical zinc powder decreases as the amount of the spherical zinc powder is increased relative to the amount of the solvent. If the mixed amount of the solvent exceeds 90% by weight, there is a possibility that the flaking workability may decrease due to the delay of the working time for volatilizing the excess solvent as the solvent is excessively mixed.

In the present invention, the solvent is methyl alcohol, ethyl alcohol, isopropyl alcohol, alcohols, xylene, benzene, toluene, coco hydrocarbons aromatic hydrocarbons, acetone, methyl ethyl ketone, methyl isobutyl ketone, asonine ketones Or it is preferable to select and use more than that.

And it is preferable to use the spherical zinc powder used by this invention having a particle size range of 1-50 micrometers, More preferably, it is 1-10 micrometers. If the particle size range of the spherical zinc powder is out of the range defined above, the particle size of the spherical zinc powder may be too small or too large, thereby reducing the flaking workability.

In the present invention, the lubricant is to prevent the agglomeration of the zinc powder during the milling operation. When the amount of the lubricant is less than 0.01 part by weight with respect to 100 parts by weight of the spherical zinc powder, the powder may aggregate with each other due to the lack of the lubricant. In addition, when the mixing amount of the lubricant exceeds 10.0 parts by weight, there is a fear that the purity of the final product is lowered and the working time is increased.

Lubricants usable in the present invention may be selected from stearic acid type or gasoline-based (white spirit, mineral sprit, etc.), polyethylene waxes (PCE (Perchloroethylene)), fluorine waxes (PTFE (Polytetrafluorethylene)), silicone waxes or It is recommended to use more than that.

In addition, the mixed material is preferably 10 to 60% by volume relative to the volume of the inner space (inner space formed by the inner diameter of the inner cylinder, see Figure 4) formed by the inner diameter of the compound ball mill inner cylinder 40. When the amount of the mixture is less than 10% by volume, there is a risk that the flaking workability is reduced due to the reduction of the milling area, and when it exceeds 60% by volume, the zinc powder may aggregate due to the generation of frictional heat.

And as described above, but the composite ball mill is filled with 20 to 80% by volume with respect to the volume of the inner space formed of the ceramic ball of zirconium or alumina having a size of 0.1 ~ 5.0mm with the inner diameter of the compound ball mill inner cylinder 40 It is preferable.

The flake zinc produced by the process according to the invention has a diameter of 10-50 μm and a thickness of 0.1-2 μm which is commercially available, and the ratio of the diameter and the thickness of the particles is 10: 1-100: 1, more preferably. Is a flake zinc having 15: 1 to 30: 1, and has a characteristic of improving the yield by 60 to 95%.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not necessarily limited to the following Examples.

(Example 1)

By using a flake complex ball milling device, a flake zinc manufacturing apparatus according to the present invention, 60% by weight of ethyl alcohol, 40% by weight of spherical zinc powder having a particle size range of 4-6 μm, and spherical zinc in a complex ball mill container. 20 vol% of the mixed ball mill internal space (the internal space formed by the inner diameter of the inner cylinder, see FIG. 4) of the mixed raw material mixed with 2 parts by weight of stearic acid lubricant as an additive with respect to 100 parts by weight of the powder is mixed. Input. At this time, the ball, the size of the zirconium material is 0.5 ~ 0.8mm container interior space filled with a condition of 70% by volume of the [preferred embodiment, the inner tube has an inner diameter of the internal space being formed by 40 (see Fig. 4) of the present invention; As a result of operating at a rotational speed of 1300rpm at a flake zinc having a diameter of 10 ~ 50㎛ and a thickness of 0.1 ~ 2㎛ was found to be able to obtain a yield of 60% or more within 30 minutes (see Fig. 6 C-1).

(Example 2)

By using a flake complex ball milling device, a flake zinc manufacturing apparatus according to the present invention, 70% by weight of ethyl alcohol, 30% by weight of spherical zinc powder having a particle size range of 4 to 6 μm, and spherical zinc in a complex ball mill container. 25% by volume of the mixed ball mill internal space (inner space formed by the inner diameter of the inner cylinder of the preferred embodiment of the present invention, see FIG. 4) was mixed with 2 parts by weight of stearic acid lubricant as an additive with respect to 100 parts by weight of powder. Input. At this time, the zirconium material ball size of 0.8 ~ 1.0mm at 70% by volume of the container interior space (inner space formed by the inner diameter of the inner cylinder (40, see Figure 4) in the preferred embodiment of the present invention) As a result of operating at a rotation speed of 1500rpm, it was found that flake zinc having a diameter of 10 to 50 µm and a thickness of 0.1 to 2 µm can obtain a yield of 70% or more within 30 minutes (see FIG. 6C-7).

(Comparative Example 1)

A spherical zinc powder with a particle size range of 4 to 6 µm is injected into the interior space of the composite ball mill container using attrition milling at a volume of 30% by volume in a zirconium material of 1.0 to 1.5 mm. Was operated at a rotational speed of 2000 rpm under dry process conditions filled to 50% by volume of the inner space of the vessel, and had a diameter of 10 to 50 µm and a thickness of 0.1 to 2 µm. The yield of flake zinc with ˜50: 1 was 21% after 30 minutes, 22% after 60 minutes, and 33% after 120 minutes. However, after 120 minutes, the agglomeration of the particles occurred, and the grain size increased significantly, so that it was difficult to obtain a further yield (see FIG. 7A-1).

(Comparative Example 2)

Zirconium material size was added to the container by inserting 60% by weight of ethyl alcohol and 40% by weight of spherical zinc powder having a particle size range of 4 to 6 μm into an inside space of the container by using attrition milling. Ball with a diameter of 1.0 ~ 1.5mm was operated at a rotational speed of 2000rpm under wet process conditions filled with 50% by volume of the inner space of the vessel. The yield of flake zinc with a ratio of 10: 1 to 50: 1 was 18% after 30 minutes, 21% after 60 minutes, and 20% after 120 minutes. However, no further improvement in yield was seen after 48 hours later (see A-2 of FIG. 7).

(Comparative Example 3)

When the flake zinc was prepared by adding 2 parts by weight of a stearic acid lubricant as an additive to 100 parts by weight of zinc powder under the same conditions as in Comparative Example 2, it had a diameter of 10 to 50 µm and a thickness of 0.1 to 2 µm, The yield of flake zinc with a ratio of 10: 1 to 50: 1 was 26% after 30 minutes, 30% after 60 minutes, and 27% after 120 minutes. However, after 48 hours, the yield was reduced to 25% or less (see FIG. 7A-3).

Compared to the flake zinc production yields of Examples 1 and 2 and Comparative Examples 1 to 3, an embodiment of preparing flake zinc using a flake zinc complex ball mill (complex ball milling) which is a flake zinc production apparatus according to the present invention In case of 1 and 2, when it is operated at 1300 ~ 1500rpm, more than 70% yield can be obtained within 30 minutes. On the contrary, for 30 minutes in all of the methods of Comparative Example 1 (dry process), Comparative Example 2 (wet process) and Comparative Example 3 (wet process + 2% additive) which produced flake zinc by using attrition milling. After 60 minutes and 120 minutes, the yield was confirmed not to exceed 30%.

In particular, in the case of Comparative Example 1, the amount of the initial by-product appeared high, and when the milling for more than 120 minutes it was found that there is a problem in terms of production of flake zinc due to the aggregation of the raw material occurs.

Therefore, in Examples 1 and 2 according to the present invention, the degree of flattening of the produced flake zinc was excellent and the yield was confirmed to be a commercially competitive mass production process.

In the present invention Figure 6 relates to a graph showing the change in yield of the flake zinc produced by the method of Examples 1 and 2 according to the present invention over time, Figure 6 is compared with Examples 1 and 2 The graph which shows the change of the yield with time progress of the flake zinc manufactured by the method of the comparative examples 1-3.

8 and 9 are photographs of the zinc flakes prepared according to the method of Examples 1 and 2 according to the present invention in a SEM photograph and enlarged 2000 times, FIG. 8 is a sample of Example 1, FIG. 9 shows the samples of Example 2, respectively.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention described in the claims below. It will be appreciated.

The flake zinc manufacturing apparatus of the present invention in the flake zinc manufacturing apparatus to form flake zinc, the flake zinc manufacturing apparatus 10 is a holding tank (12; holding tank), the circulation pump 14 and the compound ball mill 20 And the composite ball mill 20 is connected to the holding tank 12 and the inlet line 13 and the outlet line 15 to circulate the spherical zinc powder while circulating the mixed raw material flowing into the holding tank 12 Allow the process of oxidization to proceed; The composite ball mill 20 is located in the inner cylinder (31) and the inner space 31 of the outer cylinder (30) is formed to accommodate the mixed raw material supplied from the holding tank 12, the external motor It is characterized in that it has a rotor (50) driven by, the ball is abrasion resistance is filled in the inner space 31 to flake the spherical zinc powder.

The present invention relates to an apparatus for producing flake zinc, and more particularly, to flake a spherical zinc powder using a flake composite ball milling, so that the degree of flaky zinc is excellent and the porosity is increased. It is possible to improve the anti-corrosive pigment performance by increasing the blocking effect of corrosion factors and increasing the anti-corrosive performance by increasing the specific surface area, and by shortening the manufacturing time by the continuous manufacturing process, it is possible to increase the yield and increase the yield. It is possible.

Claims

In the flake zinc manufacturing apparatus,

The flake zinc manufacturing apparatus 10 is provided with a holding tank (12; holding tank), the circulation pump 14 and the compound ball mill 20,

The composite ball mill 20 is connected to the holding tank 12, the inlet line 13, and the outlet line 15 to circulate the mixed raw material flowing into the holding tank 12 while flake-forming the spherical zinc powder. To be possible;

The composite ball mill 20 has an outer cylinder 30 is formed with an inner space 31 for receiving the mixed raw material supplied from the holding tank 12,

A ball having a rotor (50) located in the inner space (31) of the outer cylinder (30) and driven by an external motor and having a high wear resistance to flake spherical zinc powder in the inner space (31). Flake zinc manufacturing apparatus characterized in that the filling.
The method of claim 1,

The compound ball mill 20 further includes an inner cylinder 40 in which the filled ball is located therein;

The inner cylinder 40 includes a plurality of circular disks 41 having an outer diameter smaller than the inner diameter of the outer cylinder 30 and formed to have an inner diameter larger than the outer diameter of the rotor 50 positioned in the inner space 31. It is made, the circular disk 41 has a form of a multi-layered stacked structure by being supported by a supporting bar 60 which is disposed at regular intervals in parallel with the inlet line 13 is coupled to the outer cylinder 30, A gap holder 62 is installed between the circular disks 41 in the circumferential direction so that the mixed material flowing into the inner cylinder 40 and the flake forming process is discharged to the outlet line 15. Flake zinc making machine.
The method of claim 2,

The outlet line 15 further comprises a condenser 16 for preventing the temperature rise of the mixed raw material circulated from the composite ball mill (20) to the holding tank (12).