KR20160037435A

KR20160037435A - Ceramic filter composition and Method for manufacturing ceramic filter using the same

Info

Publication number: KR20160037435A
Application number: KR1020140129902A
Authority: KR
Inventors: 김성규; 최기영
Original assignee: 주식회사 테드솔루션
Priority date: 2014-09-29
Filing date: 2014-09-29
Publication date: 2016-04-06

Abstract

The present invention relates to a ceramic filter composition for use in a humidifier, and a method of manufacturing a ceramic filter using the same, and more particularly, to a ceramic filter composition comprising diatomite, carbon, binder, and frit, and a method of manufacturing a ceramic filter using the ceramic filter composition. do.

Description

TECHNICAL FIELD [0001] The present invention relates to a ceramic filter composition and a ceramic filter manufacturing method using the ceramic filter composition.

The present invention relates to a ceramic filter composition used in a humidifier and a method of manufacturing a ceramic filter using the same.

Today, despite the increased time spent in the enclosed indoor space blocked by external air inflow due to dust and air pollution, the residential environment is dominated by concrete buildings such as apartments with poor humidity control, The occurrence of colds is increasing.

Proper humidity control in dry rooms is essential to prevent respiratory illnesses and to maintain a pleasant living environment.

Accordingly, a humidifier is provided to prevent respiratory diseases and colds caused by humidity reduction, deformation of residential products such as wooden furniture, generation of static electricity, and a pleasant indoor environment. A kettle on the stove, laundry in the room, and a humidifier After replacing the old days, a heated humidifier, an ultrasonic humidifier, a combined humidifier (combined with heating and ultrasonic), and a vaporized humidifier are distributed and sold.

In recent years, well-being appliances have emerged as the center of life, and a representative example is the humidifier. Therefore, consumers are increasingly looking for humidifiers equipped with sterilizing and antibacterial functions.

However, in the case of the ultrasonic humidifier, the disinfectant is contained in the minute particles of the water sprayed by the disinfectant to remove impurities or bacteria in the water, resulting in death caused by the lung disease. As a result, the consumer of the ultrasonic humidifier Negative perceptions spread and the market stagnated.

In addition, the conventional evaporative humidifier, the heating humidifier, and the combined humidifier can not completely solve the problems of sterilization and the like, and there is a problem that there are risks and troubles in the use of the product. Therefore, It is urgently required to develop a filter composition capable of suppressing reproduction and noise.

KR 10-2001-0074659 A (August 4, 2001 open) KR 10-1999-0014412 A February 25, 1999 open)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ceramic filter which can be used in a humidifier with a heater.

Another object of the present invention is to provide a ceramic filter composition capable of maintaining an appropriate humidity (40% ~ 60%) of a room when applied to a humidifier by having a proper pore size and thickness.

Another object of the present invention is to provide suitable production conditions such as size range of powder, binder type and amount of addition, sintering temperature, thickness and the like in the production of the porous ceramic filter.

The above-described object of the present invention can be attained by providing a ceramic filter composition comprising diatomite, carbon, binder and frit.

According to a preferred feature of the present invention, it may further comprise a zeolite.

According to another preferred feature of the present invention, the binder is CMC (Carboxymethylcellulose).

It is another object of the present invention to provide a method for producing a ceramic filter, which comprises: (a) mixing diatomaceous earth, carbon, binder, frit and water into a ceramic filter composition; (b) pressing the ceramic filter composition at a molding pressure of 100 kg / cm < 2 > (c) calcining the preform at 1000 ° C to 1100 ° C for 40 minutes to 80 minutes; And (d) cooling the ceramic filter to a temperature of 20 ° C to 50 ° C, wherein a ceramic filter having a water absorption of 100% to 110%, a strength of 30 kg / cm 2 to 40 kg / And also to provide a manufacturing method.

At this time, according to a preferred feature of the present invention, the diatomaceous earth is subjected to a grinding treatment to 325mesh or less and the carbon to 200mesh or less.

According to another preferred feature of the present invention, the step (a) comprises mixing the diatomite with the carbon at a mixing ratio of 3: 1.

According to another preferred feature of the present invention, in the step (a), the water content of the ceramic filter composition is 65%.

According to the ceramic filter composition and the ceramic filter manufacturing method using the ceramic filter composition according to the present invention, it is possible to manufacture a ceramic filter having a proper pore size and thickness necessary for maintaining the proper humidity of the room when the humidifier is applied.

1 is a flow chart of a method of manufacturing a ceramic filter according to an embodiment of the present invention.
2 is a sintering process chart at 1050 ° C.
Fig. 3 is a sintering process chart at 1100 deg.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the embodiments described below are only for explanation of the embodiments of the present invention so that those skilled in the art can easily carry out the invention, It does not mean anything. In describing various embodiments of the present invention, the same reference numerals are used for components having the same technical characteristics.

According to one embodiment of the present invention, there is provided a ceramic filter composition comprising diatomaceous earth, carbon, a binder and a frit.

Here, the diatomaceous earth preferably includes the composition shown in [Table 1] below.

SiO2 Al2O3 Fe2O3 TiO2 CaO MgO Na2O K2O Weight loss 91.9 2.67 1.33 0.11 0.58 0.26 2.81 0.26 Less than 0.01

As the binder, it is preferable to use CMC (Carboxymethylcellulose), and a filler is used as a filler.

In addition to this, zeolite may be added to improve moldability.

The ceramic filter according to an embodiment of the present invention is manufactured by firing the ceramic filter composition and has a water absorption rate of 100% to 110%, a strength of 30 kg / cm 2 to 40 kg / cm 2 and a pore size of 300 nm or less, (Absorptivity: 60% or more, strength: 10 kg / cm 2 or more, pore size: 100 μm or less).

FIG. 1 is a flowchart of a method of manufacturing a ceramic filter according to an embodiment of the present invention. Referring to FIG. 1, a method of manufacturing a ceramic filter will be described step by step.

Mangwang step( S10 ):

The diatomaceous earth is mined to 325mesh or less and the carbon to 200mesh or less.

Mixing step ( S20 ):

Diatomaceous earth, carbon, binder, frit and water are mixed and mixed in a ceramic filter composition. At this time, mixing can be performed by a V-mixer.

Diatomaceous earth is a collection of sediments consisting of pseudo-algae shells, which are called diatomes with an average size of 50 μm to 100 μm. They form cell walls by absorbing silica from water, and sediments of these diatoms are hardened for a long period of time, . Diatomaceous earth absorbs and decomposes toxic substances, which is a kind of algae, phytoplankton, that depletes very small bubbles. Because of these small bubbles, diatomaceous earth accumulated over millions of years has pores up to 5,000 times that of activated carbon, The harmful substance particles that are contaminated with the fine pores are adsorbed and filtered. In addition, micropores of diatomaceous earth maintain moisture or remove odors.

Diatomaceous earth is mainly composed of amorphous silica and is physically and chemically stable. It is porous, light and absorbent and excellent in heat insulation. It is used as a filter aid, filler, catalyst, absorbent, insulation / insulating material and abrasive.

Carbon acts as a porogen. Carboxymethylcellulose (CMC) is preferably used as a binder, and frit is used as a filler. As another embodiment of the present invention, in addition to the above-mentioned composition, a zeolite may be further added as an additive for improving moldability.

The mixing ratio of diatomaceous earth to carbon is preferably 3: 1. For example, diatomite 75wt% and carbon 25wt% may be mixed and the frit may be mixed with 4wt% to 12wt%. At this time, the water content of the ceramic filter composition is preferably 65%, and the composition ratio of the binder is preferably 0.4 wt% to 0.6 wt%.

Molding step ( S30 ):

The ceramic filter composition formulated in the mixing step (S20) is pressed at a molding pressure of 100 kg / cm < 2 > to form a formed body.

Firing step ( S40 ):

The formed body molded in the molding step S30 is placed in an electric furnace and fired at 1000 to 1100 DEG C for 40 to 80 minutes.

Cooling phase ( S50 ):

The fired compact is naturally cooled in an electric furnace at 20 ° C to 50 ° C. There is a problem that a crack is generated when the electric furnace is taken out from the electric furnace before reaching the temperature range.

The ceramic filter manufactured through the above steps has a water absorbing rate of 100% to 110%, a strength of 30 kg / cm 2 to 40 kg / cm 2, a pore size of 300 nm or less, / Cm < 2 > or more, pore size: 100 mu m or less).

Table 2 below shows the measurement results of the physical properties of the ceramic filter by the firing temperature.

Here, the forming pressure was 100 kg / cm 2, 0.5% CMC was used as the binder, and the particle size of carbon was -200 mesh.

As can be seen from the following Table 2, in order to satisfy the performance criteria (absorption rate: 60% or more, strength: 10 kg / cm 2 or more, pore size: 100 μm or less) required for application of the humidifier, , It is preferable that 8 wt% to 12 wt% of frit is added to 75 wt% of diatomaceous earth and 25 wt% of carbon.

Firing temperature
(° C) 1000 ℃
1050 ° C 1100 ℃ division
(%) Plasticity
Contraction ratio
(%) Absorption rate
(%) Bending strength
(kg / cm2) Plasticity
Contraction ratio
(%) Absorption rate
(%) Bending strength
(kg / cm2) Plasticity
Contraction ratio
(%) Absorption rate
(%) Bending strength
(kg / cm2) Diatomaceous earth: 75
Carbon: 25
Frit: 4 0.31 128.52 12.19 0.35 124.07 24.16 0.77 123.59 21.83 Diatomaceous earth: 75
Carbon: 25
Frit: 6 0.25 129.77 17.33 0.37 123.70 27.63 1.12 120.44 27.00 Diatomaceous earth: 75
Carbon: 25
Frit: 8 0.18 126.64 21.35 0.53 119.87 31.61 1.86 112.71 43.59 Diatomaceous earth: 75
Carbon: 25
Frit: 10 0.26 122.31 22.10 1.02 114.27 32.33 2.27 109.20 47.92 Diatomaceous earth: 75
Carbon: 25
Fritt: 12 0.34 119.46 24.29 1.38 113.15 43.25 2.82 105.33 60.59

2 is a firing step at 1050 ° C, and Fig. 3 is a firing step at 1100 ° C.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

S10:
S20: Mixing step
S30: molding step
S40: Firing step
S50: cooling step

Claims

Diatomaceous earth, carbon, binder, and frit.

The method according to claim 1,
Zeolite < / RTI >

The method according to claim 1,
Wherein the binder is CMC (Carboxymethylcellulose).

(a) mixing diatomaceous earth, carbon, binder, frit and water into a ceramic filter composition;
(b) pressing the ceramic filter composition at a molding pressure of 100 kg / cm < 2 >
(c) calcining the preform at 1000 ° C to 1100 ° C for 40 minutes to 80 minutes; And
(d) cooling to a temperature of 20 ° C to 50 ° C,
Wherein a ceramic filter having an absorption rate of 100% to 110%, a strength of 30 kg / cm 2 to 40 kg / cm 2 and a pore size of 300 nm or less is manufactured.

The method of claim 4,
Wherein the diatomite has a surface roughness of 325 mesh or less and the carbon has a surface roughness of 200 mesh or less.

The method of claim 4,
Wherein the step (a) comprises mixing the diatomite with the carbon at a mixing ratio of 3: 1.

The method of claim 4,
Wherein the water content of the ceramic filter composition in step (a) is 65%.