JP2007197295A - Method of producing artificial clay for roof tile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of producing artificial clay for a roof tile as a new resource for a ceramic raw material in which a new material of coal ash is easily converted to and generates the artificial clay for the roof tile and which is simply applicable, though clay for roof tiles having a stable supply capacity sustainable for a long time and large amount consumption and excellent in plasticity, firing crystallinity and fire resistance has been necessary to be developed in order to manufacture ceramic roof tiles. <P>SOLUTION: The artificial clay for the roof tile can be produced by a novel technical art which enhances a mutual fuse and melt crystallinity among compounds such as a mineral of a natural kaolin as an aluminum source having properties of high heat resistance and high heat capacity, silica sand, and a weathered granite and a waste tile chamotte as another extender raw material when coal ash is added and blended in a significantly large extending proportion to plastic raw clay of a main raw material of the ceramic roof tiles, the novel technical art comprising making up with a new technique of adding a mineral of a natural feldspar, humidifying and blunging in a practical way of moisturing the total compounds in a pulverizer, a clay blunger or the like and thereafter mixing homogeneously by stirring at normal temperatures and pressure without liquefying into a slurry. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention belongs to the field of artificial tile clay manufacturing method for pottery tile manufacturing, and natural tile tile clay (clay) that is consumed per tile by using the coal ash of Figs. This invention relates to a method for reducing the amount of the use of the artificial tile and putting the artificial tile clay necessary for manufacturing the ceramic tile into practical use.

The pottery tile industry has a large amount of natural tile tile (plastic tile clay) shown in Fig. 10 due to mass production of tiles (total annual production of about 1.5 billion nationwide) (annual consumption of nationwide is about 4.5 million tons) However, research and development of alternative resources has not been conducted over the years. This is a serious problem that causes an unstable raw material shortage and shakes the foundation of the ceramic tile manufacturing industry. Against this background, establishment and practical application of a method for producing artificial tile clay is strongly desired.

The coal ash (fly ash) shown in FIG. 11 is a large amount of coal ash discharged from the vicinity of the inventor's address and nationwide coal-fired power plants (approximately 9.2 million tons in 2004) as industrial waste. At present, landfill disposal of industrial waste with disposal costs is being carried out on the coast and vacant land. There is concern that relying on this disposal method will eventually cause environmental destruction. Therefore, for example, as disclosed in Patent Document 1, a technique of adjusting coal ash to a slurry and then utilizing it for clay production has been proposed.
Japanese Patent No. 2519666

Substituted from the background of large-scale consumption of natural clay tile (plastic clay) with excellent properties such as plasticity, moldability, fired crystallinity, fusion meltability, and fire resistance for the production of earthenware tiles The discovery of similar resources has been a challenge. In addition, it has been essential to develop tile clays with the above-mentioned properties that can provide a long-term stable supply that can withstand long-term mass consumption. It did not come. And the technique described in said patent document 1 is what has not reached mass production only in the various utilization test in a laboratory stage.

With this background, the inventor has focused on utilizing the above-mentioned coal ash, which can be stably supplied in large quantities for a long period of time, as a new raw material for artificial tile clay. The present invention has been completed by making ingenuity in solving the problem of easy conversion and generation. In addition, the new technology for producing and converting coal ash (fly ash) into an artificial tile clay that can be used practically as an effective resource for stable ceramic materials in the production of earthenware tiles is simple in production method and can be established for effectiveness and practical use. Although it must be an invention, the effectiveness of the present invention also exists in that respect.

In order to solve the above-mentioned problems, the present invention, firstly, as a raw material of a bulking agent, which is a main raw material for earthenware tiles, as an extender raw material, an aluminum source and a fusion as needed to a compound before coal blended with coal ash Manufacturing of ceramic tiles characterized by humidifying and kneading, which employs a technology that mixes and kneads the entire compound uniformly and finely at room temperature and normal pressure to add and homogenize accelerators and crystallization accelerators. The tile clay for can be manufactured artificially.

Secondly, to improve the fire resistance and calorific properties of the combined product produced by adding and combining a large amount of coal ash with low fire resistance and low calorie properties, as an aluminum source as necessary, melting point 2050 ° C, Alumina (Al ₂ O ₃ ), kaolinite (Al ₂ O ₃ .2SiO ₂ .2H ₂ O), halosite (Al ₂ O ₃ .2SiO ₂ .4H ₂ O) having a boiling point of 3000 ° C. and shown in FIG. ) Is selected as the main component, and the fire resistance of silica dioxide SiO ₂ is also selected as the silica source. In addition, artificial clay clay can be produced with the characteristics of suitably combining these clay main components and artificially improving high fire resistance and high calorific value.

The other aluminum source is an aluminum compound with improved fire resistance selected from a group of substances such as aluminum hydroxide, soluble aluminum salts, and various hydrated aluminas. In addition, the cause of defects such as cristobalite phenomenon, cold cracking, deformed shape / deformation / crack due to carbonization phenomenon of the fired product is a phenomenon caused by deterioration and deterioration of fire resistance due to lack of aluminum source. This problem was solved by adding the kaolin in No. 5 and increasing the amount of alumina (Al ₂ O ₃ ) shown in FIG.

With weak melt crystallization force properties Thirdly, selected according to need natural silica sand and weathered granite quartzite and aggregate combination of the silica source to refer improve melt crystallization force of coal ash, silica dioxide SiO ₂ It is possible to produce artificial tile clay with the characteristic that it combines from the mineral group to increase the firing strength of the fired tile.

Silica as a silicic acid raw material ranges from a single crystal of quartz to an aggregate of quartz. Practically, natural silica sand with high purity silica component that can be used in combination with aggregate is suitable.

Fourthly, natural feldspar minerals are selected as necessary to improve the coal ash melt crystallization force, which has a weak melt crystal strength property, and the plastic raw earth and coal ash are fused, bonded, and crystallized. Artificial roof clay can be manufactured with the feature of increasing the fusion strength and improving the mutual fusion strength with other additive raw materials and aggregates to increase the firing strength of the fired tile.

Therefore, in order to efficiently dissolve, melt and bond coal ash into kneaded clay in a short simple process, it is necessary to develop and use a system that regularly adds and kneads a fusion accelerator called feldspar, if necessary. was there. Further, the feldspar orthoclase (KAlSi ₃ O _8), albite (NaAlSi ₃ O _8), there is a anorthite _(CaAl 2 _Si 2 _{O 8)} and the main minerals of barium feldspar _(BaAl 2 _Si 2 _{O 8)} By using it according to the application including feldspar-like gravel, the artificial tile clay manufacturing method was completed.

Fifth, artificial tile clay combined with coal ash added in the range of 1 to 90 parts by weight to the plastic clay and, if necessary, natural kaolin, feldspar, quartz sand, weathered granite, etc. The technology to produce the above is a practical method of humidification, which does not liquefy these compounds in a slurry state, but emphasizes high-precision technology that uniformly mixes the entire compound at normal temperature and normal pressure in a pulverizer or earth smelter. Artificial tile clay can be produced with the characteristics of kneading.

In nature, clay minerals are mainly kaolinitic clay, and the contained aluminum silicate mineral weathering action is repeated, and the effects of dissolution, leaching and seabed weathering are affected by hydrothermal alteration by acidic hot water for a long time. It is generally considered to generate. However, as a practical artificial manufacturing method, it is necessary to use a technique in which the compounds according to necessity are uniformly mixed by the above-described method in a simple process in a short period of time.

Although the tile roof, which is the main raw material for pottery tiles, has been depleting in recent years, its depletion countermeasures and research and development have been overlooked. In the past, there has been no established case for the development of technology for producing artificial tile clay for the production of pottery tiles using coal ash, leading to commercialization that enables mass production in factories. In addition, the law on the promotion of the use of recyclable resources enacted in 1991 established that coal ash discharged in large quantities from thermal power plants was designated as a specified by-product, and the expansion of use as a reclaimed resource was planned. The coal ash (fly ash) discharged from the thermal power plant using coal has been used in various tests at the laboratory stage, but has not yet been mass-produced. The method of the present invention Can be used as an effective and stable supply resource for the production of pottery tiles, and solves the problem of excessive consumption of natural tiles in the background of the pottery tile industry.

Furthermore, the present invention can easily convert the industrial waste coal ash into artificial tile clay with high efficiency as a stable raw material for effective earthen tile clay. In addition, in the conversion of coal ash into artificial tile clay, a slurry disclosed in the above-mentioned Patent Document 1 is added by adding a small amount of fusion / melting accelerator and silica source crystallization accelerator in addition to an aluminum source as required. It is possible to produce artificial tile clay at room temperature by performing agitation and humidification kneading under normal temperature and normal pressure conditions without being liquefied.

The particle size distribution of the coal ash shown in FIG. 11 is mainly composed of silica dioxide SiO ₂ and alumina oxide Al ₂ O ₃ having a particle size / particles in a particle size distribution measurement range of ₂ μm to 150 μm mainly from 5 μm to 50 μm. It is a fine particle body. Most of the coking coal used in thermal power plants is imported from foreign countries, and its components differ depending on the origin and combustion conditions. The weight ratio of silica to alumina contained in coal ash (Al ₂ O ₃ : SiO ₂ ) is in the range of about 25%: 75% to about 30%: 70%. It contains several kinds of heavy metals such as a small amount of titanium oxide and zinc oxide, and it is colored gray because unburned carbon remains in a slight amount of 2-3%. In addition, coal ash has no viscosity or plasticity and is extremely poor in moldability. In addition, the fired crystal strength is weak, and there is a concern about the strength, fire resistance, and insufficient heat required for the fired product.

As an example of the new technique 1, in order to determine the plasticity and formability of the artificial tile clay to be produced, a compound in which the tile original clay and coal ash are mixed in the range of 1 to 90 parts by weight Utilizes the properties of viscosity, plasticity and fired strength. The tile tile used is a hexagonal layer of kaolinite clay and montmorillonite clay as shown in Fig. 10. The particle size distribution of ultrafine-grained debris deposits is 2 μm or less and the particle size distribution is 20%. Clay having a particle size distribution amount of around 40% was suitable within the above range.

Regarding the blending ratio of coal ash as an example of the new technology 2, the blending ratio of the raw clay (clay) coal ash ranges from 1 to 90 parts by weight for each application in order to obtain the plasticity and moldability of artificial tile clay. In this case, the mixing ratio of the raw clay (clay): coal ash is preferably 30:70 to 40:60 parts by weight.

Regarding the blending ratio of natural kaolin as an example of the new technology 3, the fire resistance of coal ash is in the range of SK14 ± in the firing temperature measurement method using the first kind of Zegel cone, so the fire resistance is low and important for firing. The amount of heat is very poor. For this reason, it is essential to add alumina having a melting point of 2050 ° C. and a boiling point of 3000 ° C. as shown in FIG. 9, but if necessary, the addition of natural kaolin shown in FIGS. It is made into the range of -20 weight part, Preferably it adds in the range of 5 weight part-8 weight part, and the lack of the fire resistance as needed is compensated. The fire resistance of natural kaolin is preferably in the range of SK No. 33 to SK No. 36 according to the second-type Zeger cone measurement method. The kaolin used is mainly composed of kaolinite and halosite in the kaolin deposit. As another alumina source, it was confirmed that weathered granite also had an additive effect.

In order to improve the calcining crystal strength and calcining strength of coal ash as an example of the new technology 4, the natural feldspar shown in FIG. Add. Addition of 8 parts by weight suitably promotes dissolution and adhesion of compounds such as tile clay, silica sand, weathered granite, waste tile chamotte, and coal ash (fly ash). The improvement of hardness and strength was confirmed.

As an alternative to silica as an example of the new technology 5, the natural silica sand shown in FIG. 2 is added as necessary in the range of 1 to 25 parts by weight, preferably 10 parts by weight. The silica content purity of the silica sand is preferably 90% or more. Moreover, the effect also confirmed the effect as an aggregate, and also confirmed the partial effect by addition of weathered granite as another silica source.

As another compounding material as an example of the new technique 6, chamotte obtained by finely pulverizing waste tiles was used in an amount of 1 to 20 parts by weight, preferably 10 parts by weight as an increase / combination material. The effect also confirmed the use effect of the aggregate. As other applications, it was confirmed that the recycling of waste in the environment and resources field can be established for the disposal of waste tiles.

The newly generated artificial tile clay as an example of the new technology 7 is composed of plastic raw earth, coal ash, kaolin, feldspar, quartz sand, weathered granite, waste tile chamotte, etc., as raw materials, and is mixed with water and humidified. After that, agitation and kneading technology is carried out, in which the mixture is kneaded and mixed homogeneously and finely with a pulverizer or earth smelter. In order to make the kneading of these compounds uniform, the kneading time is carried out on the basis of a range of 30 minutes to 60 minutes per cubic meter. The hydrothermal reactions of kaolinite (Al ₂ O ₃ · 2SiO ₂ · 2H ₂ O) synthesis constituting kaolin are classified according to reaction, and the reaction time required for crystallization depends on the predetermined setting conditions such as reaction temperature. Show change and different. The coal ash fly ash used is silica alumina of fine spherical particles centered on particles having a particle size of several μm shown in FIG. 11, and the presence of quartz and a small amount of mullite is confirmed. The halosite (Al ₂ O ₃ 2SiO ₂ 4H ₂ O) constituting kaolin exhibits an endothermic peak at 100 ° C to 200 ° C, an endothermic reaction at 500 ° C to 600 ° C, and an exothermic reaction at 900 ° C to 1150 ° C. Is essentially the same as Kaolinite.

The present invention will be described with reference to FIG. 1 below with reference to the accompanying drawings. FIG. 1 shows a flow chart of the manufacturing process. Here, reference numeral 1 is a plastic raw soil, reference numeral 2 is an extender raw material (coal ash), reference numeral 3 is an added aluminum source (kaolin), reference numeral 4 is a melting accelerator (feldspar), reference numeral 5 is a silica source crystal accelerator ( The reference numeral 6 is weathered granite, the reference numeral 7 is a waste tile chamotte, the reference numeral 8 is a humidification (hydration) step, the reference numeral 9 is a stirring / humidification kneading step, and the reference numeral 10 is an artificial roof clay. As shown in the figure, a humidified kneading process is performed with a fine kneading technique to uniformly add an aluminum source and a crystallization accelerator to a compound before formation in which a large amount of coal ash is blended as a raw material for an extender in a plastic base. It includes each step of producing artificial tile clay.

In the production of artificial tile clay of the present invention, natural kaolin minerals for improving the fire resistance, meltability, fusion property and crystallinity of the coal ash fly ash of Sample 5 shown in FIG. FIG. 4 shows the effects of the accelerators of sample 3), natural feldspar mineral (sample 3), and natural silica sand (document 2). In this example, the production conditions of the addition amount of each accelerator were changed, and the production of artificial tile clay was confirmed. Comparison with Examples 1, 2, and 3 shown in the figure for each sample was performed. Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. That is, in Comparative Example 1, as a result of kneading without adding each accelerator to a simple compound of only plastic raw earth and coal ash, it was confirmed that the amount of coal ash added was less than 10 parts by weight. In Comparative Example 2, natural feldspar and quartz sand were combined without combining natural kaolin as an aluminum source with a simple compound of only plastic raw earth and coal ash in which the amount of coal ash added was in the range of 10 parts by weight to less than 30 parts by weight. Although the compounds were added, the formation could not be confirmed. In Comparative Example 3, the simple compound of Example 2 was combined with natural feldspar as a fusion agent, silica sand as a silica source, and natural kaolin as an aluminum source, and the formation was confirmed.

About description of Examples 1-10, 5% of natural kaolin of the sample 3 which FIG.3 * 5 shows with respect to coal ash (Example 1) as a fireproof improvement promoter of the coal ash of the sample 5 shown in FIG. 5), 7% natural kaolin (Examples 6 to 10), 8% sample 3 natural feldspar (Examples 1 to 10) shown in FIG. 6 and 10% natural quartz sand shown in FIG. Then, as shown in the table in the same manner as in the comparative example, the production of artificial tile clay was observed except for Example 10. Therefore, it is noted here that tile clay can be artificially generated.

Examples 1 to 9 were carried out by varying the amount of each accelerator added, such as the fire resistance of the kaolin and the fused crystallinity of the feldspar / silica sand, and confirmed the production of artificial tile clay and its effects. However, since Example 10 is difficult to mold because the product has no plasticity, it is unsuitable to use for the production of earthenware tiles as tile clay produced artificially in a tile factory. confirmed. In addition, the quantitative acceptance of the coal ash blending amount in Example 1 depends on the quality of the tile raw clay dough used as the kneading partner, and for example, the tile raw dough having a fire resistance of SK18 or less. In the case of soil, the allowable range of the coal ash blending amount is less than 10 parts by weight, and in the case of a clay soil of a tile raw earth having a fire resistance of SK18 or more, the allowable range of the coal ash blending amount is 10 parts by weight to 20 parts by weight. However, in reality, this is a very fluid and uncertain case. Therefore, in this case, if necessary, natural kaolin mineral, natural feldspar mineral, natural quartzite / silica sand are added and combined. Mass production of artificial tile clay using technology. In addition, the humidification kneading treatment time was set to be within 30 minutes for the compound amount of 0.1 cubic meter or less.

FIG. 7 shows the component content of coal ash of Sample 5 in Comparative Examples 1, 2, and 3. In the qualitative analysis of sample 5 by fluorescent X-ray, the sample was placed in a weighing bottle and dried at 105 ° C. ± 5 ° C. for 12 hours or more and then allowed to cool in a desiccator. This dried product is placed in a porcelain crucible and the calcined product and 10 times its amount of lithium tetraborate are put into a platinum (Pt) 95% + gold (Au) 5% alloy in this drying dish and melted at 1200 ° C. A bead was prepared and analyzed with a fluorescent X-ray qualitative analyzer SYSTEM 3270E manufactured by Rigaku Corporation. From the above analysis results, it is confirmed that the coal ash satisfies the conditions of a suitable extender raw material for producing artificial tile clay.

The amount of feldspar contained in Sample 3 in Comparative Examples 1, 2, and 3 is shown in FIG. Sample 3 was placed in a weighing bottle, dried at 105 ° C. ± 5 ° C. for 12 hours or more, and then allowed to cool in a desiccator. The dried product was fired in a porcelain crucible at 1050 ° C. for 2 hours. This fired product and 10 times its amount of lithium tetraborate are placed in a platinum (Pt) 95% + gold (Au) 5% alloy pan and melted at 1200 ° C. to produce a glass bead, manufactured by Rigaku Denki Co., Ltd. Were analyzed using a fluorescent X-ray qualitative analyzer SYSTEM 3270E. From the above analysis results, it is confirmed that feldspar satisfies the conditions as a suitable raw material as a crystal accelerator.

The amount of components contained in kaolin (sample 3) in Comparative Example 3 is shown in FIG. About 10 g of sample 3 was collected and placed in a tungsten carbide container, and first ground by a vibration mill. The pulverized product was placed in a weighing bottle, dried at 105 ° C. ± 5 ° C. for 12 hours or more and then allowed to cool in a desiccator. The dried product was precisely weighed in a magnetic crucible and baked at 1050 ° C. for 2 hours. The fired product was pulverized and dried in an agate mortar, and 10 times the amount of lithium tetraborate was used as a solvent to prepare a glass bead. The glass beads were analyzed with a fluorescent X-ray analyzer. FIG. 3 shows a thermal expansion test of Sample 3. The raw material whose average linear thermal expansion coefficient (room temperature to 500 ° C.) is the power of 3.92 × 10 −6. From the above analysis results, kaolin as the aluminum source is refractory. It is confirmed that all the conditions suitable as an accelerator for improving the amount of heat are satisfied.

In order to confirm the effect of the comparative example 3, it shows in FIG. For the qualitative analysis of sample 4 (product) by fluorescent X-ray, the product sample was placed in a tungsten carbide (WC) container and pulverized by a vibration mill. The finely pulverized product was dried and allowed to cool at 105 ° C. to 110 ° C., then precisely weighed in a magnetic crucible and heated at 1050 ° C. in an electric furnace to confirm the loss on ignition. Using a sample after ignition, a glass bead prepared by melting 10 times the amount of lithium tetraborate in a platinum (Pt) 95% + gold (Au) 5% alloy dish at 1200 ° C. was analyzed. . From the above analysis results, it is confirmed that the product satisfies suitable conditions for the accelerator for improving the refractory heat quantity as shown in FIG.

In the fluorescent X-ray qualitative analysis of the artificial tile clay product obtained in Example 3, the content value of the refractory alumina oxide Al ₂ O ₃ is 20 wt%, as shown in FIG. The content value of silica dioxide SiO ₂ exhibiting crystallinity was 67 wt%.

In addition, in the fire resistance test, SK No. 20 is measured, and the content of iron oxide FeO that causes the burned organism to turn red shows a measured value of 1.9 wt%, the firing color is a light beige color, and a suitable tile firing color is obtained. Indicated.
The other inclusions are as shown in FIG.

In the particle size distribution measurement, 15% of silts of 2 μm to 5 μm measure 15%, and the particle size of the ultrafine particles of 2 μm or less in the hexagonal layer shape shown in FIG. 10 of kaolinite clay or montmorillonite clay is shown. The distribution measurement showed 37%. This numerical value is high fire resistance, high plasticity and high formability.

In the firing test of the product, firing was performed for 2 hours from room temperature to 200 ° C, 3 hours from 200 ° C to 500 ° C, 5 hours from 500 ° C to 1000 ° C, and 2 hours 30 minutes from 1000 ° C to 1200 ° C. The measurement method was fired in a 16 KW siliconite electric furnace, and it was confirmed that the crystallinity of the fired product sufficiently satisfied the elements of ceramic tiles fired at 1200 ° C.

Thus, the artificial tile clay produced by blending coal ash fly ash according to the method of the present invention promotes modification of plasticity, moldability, fire resistance, crystallinity, meltability, etc. The uniform agitation / kneading step, etc. can be manufactured by converting it into highly reliable, high-quality artificial clay that can be suitably and practically controlled by adjusting the conditions of the pulverizer or earth smelter. Furthermore, since the present invention does not liquefy into a slurry state, a complicated process of heating while applying pressure such as autoclave treatment as in Patent Document 1 is omitted, so that a rapid practical application of a large-scale production process can be applied.

Furthermore, the present invention makes it possible to solve the resource depletion problem, which is currently difficult to understand, and is a recycling resource for recycling industrial waste of coal ash, which is emitted in large quantities of about 9.2 million tons per year from thermal power plants. Reusing and putting it into practical use helps to prevent environmental destruction and can reduce the amount of natural plastic roof tile (clay) required for production per earthenware tile in earnest. It also leads to weight reduction. In addition, it will establish a method for producing earthenware tiles by stabilizing the supply of raw materials and recycling system.

It is a production | generation flowchart which shows the manufacturing process which is one Example of this invention. It is a fluorescence X-ray-diffraction figure of the silica source (silica sand) added by the comparative example 3 and the Example. It is explanatory drawing which shows the differential thermogravimetric analysis curve of the aluminum source (kaolin) added by the comparative example 3 and the Example. It is a graph which shows the comparative examples 1-3 and the examples 1-10 which are illustrated. Fluorescent X-ray qualitative analysis test report of natural kaolin used as sample 3 in Comparative Example 3 and each example as an aluminum source to be exemplified, and main components such as content of silica SiO ₂ and alumina Al ₂ O ₃ Represents. Fluorescent X-ray qualitative analysis test report of natural feldspar used as sample 3 in Comparative Examples 2 and 3 and Examples 3 as fusion, melting and crystallization accelerators, and content of silica SiO ₂ and alumina Al 2 O 3 Represents the main component. It is a qualitative analysis test result by fluorescent X-rays of the sample 5 coal ash used in the comparative example and each example as an extender raw material to be exemplified, and represents main components such as the content of silica SiO ₂ and alumina Al ₂ O ₃ . A qualitative analysis result report by X-ray fluorescence of Comparative Example 3 and Sample 4 of artificial tiles clay produced from the examples illustrating represents the main component such as component contents of silica SiO ₂ and alumina Al ₂ O _3. Electron micrograph of alumina Al ₂ O ₃ (aluminum oxide) powder magnified 20,000 times as an alternative to an aluminum source to improve the fire resistance illustrated An example of an ultrafine grained debris deposit with a grain size of 2 μm or less in a hexagonal layer of kaolinite and montmorillonite, which is 10,000 times larger than the plastic soil of the other side mixed with coal ash. Electron micrograph 5,000 times magnified electron micrograph showing spherical fine particles of fly ash exemplified

Explanation of symbols

1 roof tile soil (plastic clay)
2 Increased raw material (coal ash fly ash)
3 Aluminum source (pulverized natural kaolin mineral as fire resistance improver)
4 Fusion melting accelerator (pulverized natural feldspar mineral)
5 Silica source (crystal accelerator, crushed natural silica as aggregate, natural silica sand)
6 Crushed material of weathered granite 7 Chamotte of waste tile pulverized material 8 Water treatment 9 Humidification and kneading treatment with pulverizer and earth smelter 10 Production (Clay clay for pottery tile)

Claims (5)

As required for the pre-production compound, coal ash (fly ash) blended in the range of 1 to 90 parts by weight as a bulking agent raw material for plastic clay, which is the main raw material for earthenware tiles, fire resistance and heat For the production of earthenware roof tiles, characterized by the addition of an aluminum source that improves the properties and homogenization by adding a fusion accelerator and a crystallization accelerator, and then humidifying and kneading with a technique of finely stirring and kneading. An artificial tile clay manufacturing method characterized by making artificial tile clay. In order to improve the fire resistance and calorific properties of the combined product produced by adding and combining coal ash in the range of 1 to 90 parts by weight with low fire resistance and low heat quantity properties, As the aluminum source, alumina (aluminum oxide Al ₂ O ₃ ), kaolinite, natural kaolin mineral mainly composed of halosite is selected, and silica dioxide SiO ₂ contained in silica as the silica source is also selected to be refractory. The artificial tile clay manufacturing method according to claim 1, wherein the clay main components are combined to improve artificially high fire resistance and high calorific value. Natural fusion sand or weathered granite, which is also used in combination with silica source silica and aggregates, is selected as necessary as a fusion accelerator to improve the coal ash melt crystallization strength. _{2. The} method for producing artificial tile clay according to claim 1, wherein silica dioxide SiO2 is combined from a mineral group to increase the firing strength of the fired tile. If necessary, natural feldspar minerals are selected as a fusion melting accelerator to improve the melting crystallization strength of coal ash with weak melting crystallization strength. 4. The fusion strength of the fired roof tile is increased by increasing the fusion strength and improving the mutual fusion strength with other additive raw materials and aggregates according to claims 1 to 3. Artificial tile clay manufacturing method. These compounds are used to produce artificial tile clay by combining waste ash chamotte with coal ash and natural kaolin, feldspar, quartz sand, weathered granite, etc. added to plastic raw earth in the range of 1 to 90 parts by weight. In a pulverizer or earth smelter, etc., a practical method of humidifying and kneading using a technology that mixes and mixes the entire compound homogeneously and finely at normal temperature and pressure is used. The method for producing an artificial roof clay according to claim 4.

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