KR20160128720A - Clay With The Waste Coffee Powder By Calcination and Method of Preparing the Same - Google Patents

Abstract

The present invention relates to a ceramic body using waste coffee bean powder, and to a preparation method thereof. More particularly, the ceramic body comprises waste coffee powder prepared by calcining coffee bean waste remaining after making coffee. The ceramic body is prepared by mixing 1-25 wt% of calcined waste coffee powder and 75-99 wt% of clay powder, and adding water to the resultant mixture with a ratio of 1:0.5 to 1:2.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preparing a wastewater containing waste coffee powder,

More particularly, the present invention relates to a method for manufacturing a pottery using a coffee bean powder and a method for manufacturing the same.

In many coffee shops in Korea, a large amount of coffee sludge, which is a waste produced by various methods of making coffee, is consumed at a great deal of cost each year in waste treatment, and it is very difficult to be buried and incinerated. In particular, such food wastes are strictly regulated by the law, and waste disposal is being fully implemented. In addition, coffee sludge can not be recycled properly, and if it is illegally buried in the soil, it causes various environmental problems such as secondary environmental pollution of the soil.

The coffee sludge contains various inorganic components, and in particular, it contains a large amount of an alkali oxide component and can play an important role as a chelating agent in the production of ceramics. Therefore, it is very valuable to use the sludge that can be used as raw materials for minerals and to use it for the ceramics having improved aesthetic technical effect.

Korean Patent Publication No. 10-2004-0081689

It is an object of the present invention to provide a ceramic substrate including calcined waste coffee powder and a method of manufacturing the same.

In order to achieve the above object,

The present invention provides a ceramic article comprising calcined waste coffee powder.

The present invention also provides a ceramics fabricated from the above-described ceramics.

In addition,

1) calcining waste coffee powder to remove organic matter; 2) mixing 1: 0.5 to 1: 2 by weight of water in a ceramic base containing 1 to 25% by weight of calcined waste coffee powder and 75 to 99% by weight of clay powder, and stirring the mixture; 3) dewatering the mixture obtained in step 2) and shaping it into a cake; And 4) spirally kneading the mixture formed in the step 3). The present invention also provides a method for manufacturing a ceramic article comprising the calcined waste coffee powder.

In addition, the present invention provides a ceramics substrate comprising calcined waste coffee powder, which is produced by the above production method.

In the case of using the ceramic substrate containing the calcined waste coffee powder of the present invention, the environmental pollution problem can be solved by recycling coffee sludge classified as food waste as a part of growth of the green business, thereby being environmentally friendly, and at the same time, By recycling the coffee powder, profit can be generated, which can improve the price competitiveness of the production of porcelain.

In addition, since waste coffee powder which is calcined as a raw material is added, it does not contain harmful substances such as artificial chemicals as a constituent, so that hygienic safety can be attained in the process of manufacturing ceramics and harmless to the human body.

Further, phosphorus is added in order to enhance whiteness, transparency, and bond strength in the production of ceramics products. In general manufacturing methods, molasses (calcium phosphate) or animal flour is added. In the present invention, calcined waste coffee powder is added instead of these materials, which is readily available and has the advantage of being able to simplify the method of addition.

In addition, by including calcined waste coffee powder compared to existing ceramics, it is possible to produce excellent ceramic products having the effect of enhancing whiteness, improving light transmittance and bonding strength, so that the color can be soft and elegant, An improved ceramic article can be produced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing analytical values of a ceramic sample prepared by the method of the present invention measured with a spectrocolorimeter. FIG.
2 is a photograph showing that there is a difference in color measurement value somewhat depending on the measurement position of the ceramic sample prepared by the method of the embodiment of the present invention.
Fig. 3 shows the ceramic samples added with the number of calcined waste coffee powder in the three groups of clay powders, BP group (celadon substrate), BC group (celadon substrate) and BW group (white porcelain substrate).
FIG. 4 is a graph showing the results of measuring the degree of color development of a sample using a BP group (celadon base) among the sample groups.
FIG. 5 is a graph showing the results of measurement of the degree of color development of a sample using BC group (celadon base) among the sample groups.
6 is a graph showing the results of measuring the colorimetricity of a sample using a BW group (white porcelain) among the sample groups.

Hereinafter, the present invention will be described in detail.

The inventors of the present invention have made intensive studies on a method that can be utilized in ceramic molding through a method of manufacturing a ceramic substrate, and as a result, the present invention has been completed.

The present invention relates to a pottery comprising calcined waste coffee powder wherein the pottery comprises 1 to 25% by weight of calcined waste coffee powder and 75 to 99% by weight of clay powder in a weight ratio of 1: 0.5 to 1: 2 And mixing them in a weight ratio.

More preferably, the waste coffee powder calcined for the ceramics is prepared to contain 2.5 to 20 wt% and 80 to 97.5 wt% of the clay powder. When the waste coffee powder calcined in the above range is included, the resultant coloring degree is improved as compared with that of a general paper.

Calcination is a method for removing organic substances, which are impurities, in order to use the collected coffee sludge as a raw material for ceramics, preferably at a temperature of 780 to 870 ° C. for 30 to 120 minutes, In the example, the calcination condition was set at about 850 ° C for about 1 hour to sufficiently fire the organic sludge and remove the impurities contained in the sludge to make waste coffee powder.

When the waste coffee powder is calcined under the above-mentioned temperature and time conditions, carbon, organic substances and the like are completely removed. In this case, disadvantages such as cracks and swelling which are generally caused in the production of ceramics can be prevented .

In addition to the above description, the specific description given in the description of the ceramic substrate containing the calcined waste coffee powder of the present invention is based on the description of the method of manufacturing a ceramic substrate including the calcined waste coffee powder described below.

In addition, the present invention relates to a pottery produced by using a calcined waste coffee powder containing the calcined waste coffee powder. The pottery can be manufactured by using a pottery containing the calcined waste coffee powder. have.

In this case, ceramics for final ceramics are manufactured using ceramics molding techniques generally known in the art by spinning, pinching, coiling, molding, plate-forming, and the like. In addition, it is possible to manufacture various kinds of tiles used for not only ordinary ceramics but also art tile materials for construction, and also various kinds of accessories such as ceramics for making various accessories. The ceramics produced from the calcined waste coffee powder containing the calcined waste coffee powder of the present invention have excellent effects such as far-infrared rays, anion emission, antibacterial and deodorization, and can exhibit various excellent color and surface texture. So that it has an advantage of being able to replace expensive interior and exterior materials such as marble.

A method of manufacturing a ceramic article comprising the calcined waste coffee powder of the present invention,

1) calcining waste coffee powder to remove organic matter;

2) mixing 1: 0.5 to 1: 2 by weight of water in a ceramic base containing 1 to 25% by weight of calcined waste coffee powder and 75 to 99% by weight of clay powder, and stirring the mixture;

3) dewatering the mixture obtained in step 2) and shaping it into a cake; And

4) stoicing the molded mixture in step 3).

In order to produce a ceramic substrate comprising the waste coffee powder of the present invention, the coffee sludge that is discarded is first collected.

As a first step, calcination is performed to remove organic matter from the collected coffee sludge. Calcination is a method for removing organic substances, which are impurities, in order to use the collected coffee sludge as a raw material for ceramics, preferably at a temperature of 780 to 870 ° C. for 30 to 120 minutes, In the example, the calcination condition was set at about 850 ° C for about 1 hour to sufficiently fire the organic sludge and remove the impurities contained in the sludge to make waste coffee powder.

If the waste coffee powder is calcined under the above-mentioned temperature and time conditions, carbon, organic substances and the like are completely removed. In this case, disadvantages that may occur in the production of ceramics using porcelain can be prevented.

Even when waste coffee powder is used, when coffee sludge, which is a raw material containing organic matter and carbon, is used without being calcined, it contains a very small amount of carbon and a large amount of organic matter. Thus, the ceramic sludge containing the calcined waste coffee powder of the present invention Are significantly different in terms of components and effects. If the carbon remains in the substrate, cracks and bulges due to bubbles, which are fatal defects of the ceramics, may appear, which can cause significant manufacturing process defects. Therefore, when calcined coffee sludge is calcined under the above-mentioned temperature and time conditions, it can be used as a supply source of excellent alkali materials in the ceramic ware without such drawbacks.

Table 1 below shows the analysis of the components of calcined waste coffee powder. It can be confirmed that a large amount of phosphoric acid (P ₂ O ₅ ) is contained in the pulverized coffee powder. In manufacturing ceramics, phosphorus is added in order to improve whiteness and to improve light transmittance and bond strength. It is added with molasses (calcium phosphate) or animal flour in general manufacturing method. In the present invention, calcined waste coffee powder is added instead of these materials, which is readily available and has the advantage of being able to simplify the method of addition.

Further, as shown in Table 1 below, calcined waste coffee powder contains various alkali components (CaO, MgO, CuO, MnO, ZnO, K ₂ O, Na ₂ O) is contained in a large amount and can be useful as a ceramic material.

As a second step, water is added to the pottery containing 1 to 25% by weight of calcined waste coffee powder and 75 to 99% by weight of the clay powder having been subjected to the above step 1) in a weight ratio of 1: 0.5 to 1: 2 The mixture can be stirred to give a mixture.

More preferably, the waste coffee powder calcined for the ceramics is prepared to contain 2.5 to 20 wt% and 80 to 97.5 wt% of the clay powder. When the waste coffee powder calcined in the above range is included, the resultant coloring degree is improved as compared with that of a general paper.

The clay powder is used as a base material in the production of ceramics, and generally white porcelain or blue celadon which is generally used in the art can be used. In one embodiment of the present invention, a BP group (celadon), a BC group (celadon), and a BW group (white porcelain) were used, and an ingredient analysis table of each substrate is shown in Tables 2 to 4 below.

In one embodiment of the present invention, the three types of ceramic clay were dried and ground with an induction machine to produce clay powder, and then subjected to a process of filtering using fine particles of various sizes in order to finely classify the particles .

Thereafter, in Comparative Example 1, waste coffee powder calcined in No. 1 (Comparative Example 1), which did not contain calcined waste coffee powder, and calcined in each of the clay powders in Examples, was added to each of the clay powders according to the number, (Example 2) in which 1 g of waste coffee powder was added (Example 1), 3 times (Example 2) in which 3 g of waste coffee powder was added, 4 times in Example 5 in which 5 g of waste coffee powder was added (Example 3) (Example 4) in which 7 g of the waste coffee powder was added (Example 4), 6 (Example 5) in which 9 g of waste coffee powder was added (Example 5), and 7 in Example 10 in which 10 g of waste coffee powder was added (Example 6).

Thereafter, water was mixed in a weight ratio of 1: 0.5 to 1: 2 to the mixed powder of calcined waste coffee powder and clay powder for ceramic ware, and the mixture was stirred to prepare a mixture.

In addition, a metal oxide may be added to the powder for holding a ceramic in the above step. The metal oxide is a coloring material, and the color changes depending on the oxidizing salt and the reducing salt during the ceramics firing or depending on the glaze component. In case of the glaze, the color difference is different according to the addition amount within 10 wt%, and in case of the glaze, it is added stepwise according to the color concentration within 30 wt%.

The metal oxide may be at least one selected from the group consisting of iron oxide, chromium oxide, manganese oxide, zinc oxide, titanium oxide and barium carbonate oxide.

In the third step, the mixture obtained in the second step is dehydrated and molded into a cake form in the form of a clay containing water. In one embodiment of the present invention, a certain amount of each sample is put into a gold leaf and a bar is formed, and the pressure is applied to the sample in the form of a cake.

In the fourth step, in the third step, the formed mixture is spun to prepare a ceramic substrate. The stoichiometry is performed by mixing highly viscous substances to ensure uniformity of water and air bubbles, and can be performed using a pugmill.

The present invention also provides a ceramics substrate comprising calcined waste coffee powder, characterized in that it is produced by the above-mentioned production method.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the embodiments of the present invention described below are illustrative only and the scope of the present invention is not limited to these embodiments. The scope of the invention is indicated by the appended claims and includes all changes that come within the meaning and range of equivalency of the claims.

Example : Waste coffee powder  How to make a porcelain base containing

The coffee sludge required for the manufacture of ceramics was calcined at 850 ° C for 1 hour in a kiln to remove organics.

Three clay pottery classified as BP group (celadon base), BC group (celadon base) and BW group (white porcelain base) were placed in a soil drier and dried to remove water by 90% The dried substrate was crushed and changed at the triggering machine.

The calcined clay and calcined clay were calcined in a dry oven for 4 hours at 80 ° C, respectively, and then the clay and the calcined waste coffee powder were finely ground again.

The ceramic clay was ground with a vibrating vibrator (vibrator machine), and the vibrator machine was operated for 15 minutes per one mesh (mesh). The particles were reduced in order of 35, 80, 100, The pottery clay filtered from Echigo and throat was placed in a container. 40 g of each sample of clay for ceramics was prepared, and calcined waste coffee powder per each sample was added in a weight ratio.

Thereafter, in Comparative Example 1, waste coffee powder calcined in No. 1 (Comparative Example 1), which did not contain calcined waste coffee powder, and calcined in each of the clay powders in Examples, was added to each of the clay powders according to the number, (Example 2) in which 1 g of waste coffee powder was added (Example 1), 3 times (Example 2) in which 3 g of waste coffee powder was added, 4 times in Example 5 in which 5 g of waste coffee powder was added (Example 3) (Example 4) in which 7 g of the waste coffee powder was added (Example 4), 6 (Example 5) in which 9 g of waste coffee powder was added (Example 5), and 7 in Example 10 in which 10 g of waste coffee powder was added (Example 6).

Thereafter, the stirrer was fixed at a rotation speed of 3 per minute using a LAP-Stiller machine at a speed control speed of 3 rpm, and the water mixture ratio per sample was 100 wt%.

It was then dried in a dry oven at 80 ° C for 10 hours and then treated with Rock LABY for 5 minutes to give finer fineness than the trigger.

29 g of each sample was put into a gold leaf and a bar was formed, and 15 pressure was applied to the press to form a cake.

In order to prepare a ceramic specimen using the porcelain substrate, the above-prepared porcelain substrate was subjected to a pre-firing process at 850 ° C. for 6 hours. After that, glaze was applied to the rough porcelain specimens, and finally ceramics specimens were prepared by sintering the porcelain specimens at 1230 ℃ for 10 hours.

Experimental Example : Manufacture of Porcelain Specimens Color  Measure( Spectral colorimeter  Measurement analysis)

A *, b *, and color difference ΔE * ab were measured and measured by CIE 1931 x, y Chromaticity (L * a *, b * Diagrams were collected and analyzed. As shown in FIG. 1, the a *, b * values and L * values of the color difference measurement results are slightly different according to the first () and second () measurements. As shown in FIG. 2, this result can be confirmed by the difference in color depending on the measurement position of the specimen, which is considered to be within the measurement error range. FIG. 3 is a graph showing the results of a comparison between the results of the first experiment (Comparative Example 1), the second experiment (Comparative Example 1), and the second experiment (Comparative Example 1) in which clay powders of three groups of BP group (celadon possession), BC group (celadon possession) and BW group For example, calcined waste coffee powder was added to each of the clay powders in accordance with the number. Specifically, 2 drops of the waste coffee powder (1 g) (Example 1), 3 g of the waste coffee powder 3 g (Example 4) in which 5 g of waste coffee powder was added (Example 3), 5 times in Example 7 in which 7 g of waste coffee powder was added (Example 4), 6 in Example 9 in which 9 g of waste coffee powder was added And 7 (Example 6) in which 10 g of the powder was added.

FIG. 4 is a graph showing the results of measurement of the chromaticity of the sample using the BP group (celadon base) among the sample groups, and FIG. 5 is a graph showing the results of measuring the chromaticity of the sample using the BC group And FIG. 6 is a graph showing the results of measurement of the degree of color development of a sample using BW group (white porcelain) among the sample groups.

The results were analyzed by BP group, BC group, and BW group. As a result, color difference was increased as the amount of waste coffee powder increased. In the case of the L * value representing the brightness, the value of the BP group was in the range of 56 to 60 in the case of Examples 1 to 6 in which the waste coffee powder was added. Similarly, in the BC group, The values range from 62 to 69, and both series are stable.

However, in the case of the BW group using white porcelain, it was confirmed in FIG. 6 that the BP group and the BC group have a considerably different distribution. It can be seen that the b * value, which is a standard of yellow color and blue color, in Examples 1 to 6 in which calcined waste coffee powder is added shows a very narrow width in the range of 4.5 to 5, In the case of the a * value indicating the color of Green in Examples 1 to 6 in which calcined waste coffee powder was added was measured in the range of 0 to 0.25. Particularly, the smaller the a * value is, the better the degree of color development is. The unusual point is that when using the BW group substrate, the L * value indicating the brightness is significantly higher (92 ~ 93) in Examples 1 to 6 in which waste coffee powder is added compared with that in white porcelain (Comparative Example 1) And a series of groups are formed on the graph.

Also, it was confirmed that the change of L * value, which is different from the case of BP group and BC group, in the case of BW group specimen, forms a very narrow width group. After the addition of coffee powder, It can be confirmed that it does not have a large influence on the brightness depending on the amount of light. In addition, the b * value indicating the change of yellow from yellow is similar to that of almost no change. In the case of the BW group test piece, the test piece of Comparative Example 1, in which the calcined waste coffee powder was not added, unlike the case of the BP group and BC group, and the test piece of Examples 1 to 6 in which the remaining calcined coffee powder was added * Values are clearly distinguished as L * values. Therefore, it was confirmed from the above results that the addition of calcined waste coffee powder improves the coloring degree compared to the general substrate, and that the result is particularly evident in the BW group.

Claims (8)

Possession of pottery containing calcined waste coffee powder. The method of claim 1, wherein the ceramic substrate is prepared by mixing 1 to 25% by weight of calcined waste coffee powder and 75 to 99% by weight of clay powder in a weight ratio of 1: 0.5 to 1: 2, Possession of pottery containing a waste of coffee powder. A ceramics produced by the method of claim 1. 1) calcining waste coffee powder to remove organic matter;
2) mixing 1: 0.5 to 1: 2 by weight of water in a ceramic base containing 1 to 25% by weight of calcined waste coffee powder and 75 to 99% by weight of clay powder, and stirring the mixture;
3) dewatering the mixture obtained in step 2) and shaping it into a cake; And
4) milling the shaped mixture in the step 3); and calcining the pulverized coffee powder. The method according to claim 4, wherein the calcination in step 1) is carried out at a temperature of 780 to 870 ° C for 30 minutes to 120 minutes. The method according to claim 4, comprising adding calcined waste coffee powder, characterized in that a metal oxide is added to the porcelain support of step 2). [7] The method according to claim 6, wherein the metal oxide is at least one selected from the group consisting of iron oxide, chromium oxide, manganese oxide, zinc oxide, titanium oxide and barium carbonate oxide. Gt; A pottery comprising a calcined waste coffee powder, characterized in that it is produced by the process of claim 4.

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