Rutile ilmenite added shell porcelain body and preparation method thereof

Abstract

The application belongs to the technical field of daily ceramic preparation, and particularly relates to a shell porcelain body added with rutile ilmenite and a preparation method. The shell porcelain body added with rutile ilmenite is made of the following raw materials in parts by weight: rutile ilmenite 16-23 parts, nano attapulgite 2-6 parts, Datong soil 10-18 parts, Yixian soil 3-6 parts, Longyan soil 6-8 parts, quartz 3-6 parts, and shell synthetic material 37-53 parts. The shell porcelain body is prepared by the following steps: preparing the shell synthetic material, quantitatively taking, preparing mud slurry, preparing mud strip, shaping, drying and repairing, high-temperature primary firing, high-temperature secondary firing, and color decoration. The shell porcelain body added with rutile ilmenite has the advantages of reducing the expansion coefficient of the existing shell porcelain, improving the cold and hot resistance, improving the bending strength of the shell porcelain, and reducing the problem of easy breakage of the porcelain in the application process.

Description

Technical Field

[0001] This invention belongs to the field of daily-use ceramics preparation technology, and specifically relates to a shell porcelain body with added rutile titanium ore and its preparation method. Background Technology

[0002] With the improvement of people's living standards and the diversification of household cooking appliances, the performance requirements for the matching daily-use porcelain have also increased. For example, heating appliances such as electric ovens, microwave ovens, air fryers, and dishwashers (reaching 250 degrees Celsius or even higher), as well as low-temperature freezing appliances such as refrigerators and freezers, are frequently used in applications requiring rapid transitions between heating and freezing. Existing daily-use porcelain can only meet the thermal shock resistance requirement of 180 to 20 degrees Celsius (GB / T3532), while high-end calcium porcelain such as bone china and shell porcelain only meet the thermal shock resistance requirement of 140 to 20 degrees Celsius (GB / T 13522). Improving the thermal shock resistance of high-end calcium porcelain to meet the needs of current cooking scenarios is crucial to realizing the vision of contributing to a better modern life.

[0003] Titanium resources have been widely used in aerospace, shipbuilding, special ceramics, and antibacterial materials in recent years due to their superior mechanical properties, corrosion resistance, and low coefficient of linear expansion. However, their application in everyday ceramics, particularly high-end porcelains like bone china and shell china, which have high coefficients of expansion and poor thermal shock resistance due to rapid temperature changes, presents a significant challenge. Introducing rutile titanium ore to reduce the coefficient of expansion and achieve better thermal shock resistance to meet the needs of modern everyday ceramic use is a problem that urgently needs to be solved. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides a shell porcelain body with added rutile titanium ore and a preparation method thereof.

[0005] This invention is achieved through the following technical solution: A type of shell porcelain body with added rutile titanium ore, characterized in that it is made from the following raw materials in parts by weight: 16-23 parts rutile titanium ore, 2-6 parts nano-attapulgite, 10-18 parts Datong clay, 3-6 parts Yixian clay, 6-8 parts Longyan clay, 3-6 parts quartz, and 37-53 parts shell synthetic material.

[0006] Furthermore, it is made from the following raw materials in parts by weight: 19 parts rutile titanium ore, 5 parts nano attapulgite, 15 parts Datong clay, 5 parts Yixian clay, 7 parts Longyan clay, 6 parts quartz, and 43 parts shell composite material.

[0007] A method for preparing a shell porcelain body with added rutile titanium ore, characterized by the following steps: (1) Preparation of shell synthetic material: Calcine the shells; process the calcined shells into shell powder; add tap water to the reaction tank first, then add the shell powder to generate calcium hydroxide solution, and age it in the tank; add phosphoric acid to the aged calcium hydroxide solution in the aging tank to form tricalcium phosphate or hydroxyapatite precipitate; age the precipitate, and then dry and pulverize it for later use; grind the aged precipitate according to the mass ratio of precipitate: Longyan soil: water = 20:1:20; calcine the synthetic material obtained above to form shell synthetic material. (2) Quantitative weighing: rutile titanium ore, nano-attapulgite, shell synthetic material, Longyan soil, Datong soil, Yixian soil and quartz are weighed quantitatively respectively; (3) Mud preparation: After mixing the various raw materials weighed in step (2) with water, they are wet ball milled and then put into the mud mixing tank after exiting the mill. (4) Clay strip preparation: The mud slurry obtained in step (3) is filtered, kneaded, and vacuum kneaded into clay strips, which are then aged for rolling and molding. (5) Shaping: Roll the clay strips from step (4) to form a wet blank; (6) Drying and trimming: Dry and trim the wet blank obtained in step (5) to obtain a semi-finished blank; (7) High-temperature single firing: The semi-finished blanks dried in step (6) are placed in the kiln and fired in an oxidizing flame; (8) High-temperature secondary firing: The plain porcelain obtained in step (7) is graded, polished, glazed and then fired in a kiln. After exiting the kiln, the finished product of rutile titanium ore shell porcelain is obtained.

[0008] Furthermore, in step (1), the thickness of the calcined shells is controlled to be below 30 cm, the calcination temperature is 700-1100℃, and the holding time is 1-2 hours; the calcined shells are processed into shell powder of 1000-2000 mesh; the calcium hydroxide solution is aged in the pool for at least 72 hours; the generated precipitate is aged for at least 7 days, and then crushed to 400 mesh; the material is ground for 12 hours, and the moisture content of the ground material is reduced to below 15%; the calcination temperature of the material is controlled at 1100-1300℃.

[0009] Furthermore, in step (1), the shell calcination temperature is 900℃ and the holding time is 1.5 hours; the calcined shell is processed into 1600 mesh shell powder; the calcination temperature of the synthetic material is controlled at 1200℃.

[0010] Furthermore, in step (3), the grinding moisture is controlled at 45-55%, and the particle size is ground to a sieve size of 275-325 mesh.

[0011] Furthermore, in step (3), the grinding moisture is controlled at 50%, and the particle size is ground to a 300-mesh sieve.

[0012] Furthermore, in step (4), the mud is de-ironed, sieved through a 150-180 mesh vibrating screen, filtered, and kneaded, with the moisture content of the mud strips controlled at 21-24%.

[0013] Furthermore, in step (4), the mud is filtered and kneaded after being sieved through a 165-mesh vibrating screen, and the moisture content of the mud strips is controlled at 23%.

[0014] Furthermore, in step (5), the clay strips obtained in step (4) are stirred and pulped at high speed to obtain a slurry. The moisture content is controlled at 30-35% and the specific gravity is controlled at 1.6-1.75. The slurry is then cast into a wet blank.

[0015] Furthermore, in step (5), the moisture content of the prepared mud is controlled at 33%, and the specific gravity is controlled at 1.7.

[0016] Furthermore, in step (7), the firing temperature is 1270-1310℃ and the firing cycle is 10-15 hours.

[0017] Furthermore, in step (7), the firing temperature is 1290°C and the firing cycle is 13 hours.

[0018] Furthermore, in step (8), color decoration is applied to the finished product. Lead-free frit glaze is used as the glaze material. The specific gravity of the frit glaze is 1.80-2.00, the glaze layer thickness is controlled at 0.18-0.22 mm, the firing temperature is controlled at 1180-1220℃, and the firing cycle is 7-10 hours.

[0019] Furthermore, in step (8), the specific gravity of the frit glaze is 1.9, the glaze layer thickness is controlled at 0.2 mm, the firing temperature is controlled at 1200℃, and the firing cycle is 8 hours.

[0020] The beneficial effects of this invention are: it reduces the coefficient of thermal expansion of existing shell ceramics, improves the resistance to rapid cooling and heating, and at the same time, it improves the flexural strength of shell ceramics, reducing the problem of easy breakage of ceramics during application. Detailed Implementation Example

[0021] Weigh out 23 kg of rutile titanium ore, 2 kg of nano-attapulgite, 11 kg of Datong clay, 3 kg of Yixian clay, 8 kg of Longyan clay, 3 kg of quartz, and 50 kg of shell composite material. Example

[0022] Weigh out 22 kg of rutile titanium ore, 3 kg of nano-attapulgite, 12 kg of Datong clay, 4 kg of Yixian clay, 8 kg of Longyan clay, 3 kg of quartz, and 48 kg of shell composite material. Example

[0023] Weigh out 21 kg of rutile titanium ore, 4 kg of nano-attapulgite, 13 kg of Datong clay, 5 kg of Yixian clay, 7 kg of Longyan clay, 4 kg of quartz, and 46 kg of shell composite material. Example

[0024] Weigh out 19 kg of rutile titanium ore, 5 kg of nano-attapulgite, 17 kg of Datong clay, 5 kg of Yixian clay, 7 kg of Longyan clay, 6 kg of quartz, and 41 kg of shell composite material. Example

[0025] Weigh out 21 kg of rutile titanium ore, 6 kg of nano-attapulgite, 16 kg of Datong clay, 4 kg of Yixian clay, 6 kg of Longyan clay, 3 kg of quartz, and 44 kg of shell composite material.

[0026] Titanium has an abundance of 0.56% in the Earth's crust, ranking 9th. In terms of reserves, it is not a rare metal, ranking third after iron and aluminum. Titanium is a typical lithophile element, and there are more than 80 minerals in the Earth's crust containing more than 1% titanium.

[0027] The chemical composition of the rutile titanium ore used in this invention is: TiO2 95-99wt%, Fe2O3 0.04-10wt%, Al2O3 0.15-2wt%, with other elements all below 0.5%. The loss on ignition is below 5%, mainly due to trace amounts of adsorbed water and structural water. The rutile titanium ore is preferably sourced from mineral powders from Fangcheng County, Henan Province, and Zaoyang County, Hubei Province, with a preferred particle size of 200 mesh. Specifically, it contains: TiO2 95.21wt%, Fe2O3 0.03wt%, Al2O3 1.21wt%, with a loss on ignition of 3.52%.

[0028] The nano-attapulgite used in this invention is a hydrous magnesium-aluminate silicate clay mineral with a layered chain structure, exhibiting a rod-like fibrous structure at the microscopic level. Its theoretical molecular formula is (Mg,Al)₂Si₄O₁₀(OH)•₄H₂O. Nano-attapulgite is attapulgite clay that has undergone classification, dissociation, purification, ultrafine processing, and surface acidification modification. Surface acidification modification: Before acid leaching, the mineral fibers are sharply defined and the surface is smooth. After leaching with 2-5% mol / L HCl, the attapulgite content exceeds 75%, resulting in a significant change in the microstructure of the attapulgite. The sharp edges on the mineral surface disappear after treatment, transforming it into a rod-shaped body with abundant serrations and a rough, uneven surface. With a diameter of 20-70 nm and a length ≤2000 nm, this serrated rod-shaped nano-attapulgite, when added to ceramic raw materials, plays a role in crack resistance and increasing the strength of the formed clay body; in the sintered white body, it acts as a toughener, load-bearing capacity, and strength enhancer. It significantly contributes to the thermal shock resistance and flexural strength of the white body. The attapulgite is preferably sourced from attapulgite mines in Jiangsu and Gansu provinces. Its specific composition is: Al₂O₃ 20.98 wt%, SiO₂ 53.27 wt%, Fe₂O₃ 6.76 wt%, CaO 3.15 wt%, MgO 6.17 wt%, K₂O 3.68 wt%, Na₂O 1.31 wt%.

[0029] The chemical composition of the Datong clay used is as follows: Al₂O₃ 38-46 wt%, SiO₂ 39-47 wt%, Fe₂O₃ 0.1-0.3 wt%, CaO 0.1-0.3 wt%, MgO 0.01-0.3 wt%, K₂O 0.01-0.5 wt%, Na₂O 0.01-0.5 wt%, TiO₂ 0.01-0.1 wt%, and loss on ignition 13-18 wt%. The preferred Datong clay is 200-mesh Shanxi Datong coal gangue powder. Specifically, it contains Al₂O₃ 40.85 wt%, SiO₂ 44.69 wt%, Fe₂O₃ 0.19 wt%, CaO 0.27 wt%, MgO 0.18 wt%, TiO₂ 0.07 wt%, and loss on ignition 13.75 wt%.

[0030] The chemical composition of the Longyan clay used is as follows: Al₂O₃ 30-35wt%, SiO₂ 48-52wt%, Fe₂O₃ 0.7-1.1wt%, CaO 0.1-0.3wt%, MgO 0.05-0.15wt%, K₂O 3-6wt%, Na₂O 0.3-0.6wt%, TiO₂ 0.03-0.11wt%, and loss on ignition 9-15wt%. The preferred Longyan clay is 325-mesh washed Longyan kaolin from Fujian Province. Specifically, it contains Al₂O₃ 34.17wt%, SiO₂ 49.86wt%, Fe₂O₃ 0.75wt%, CaO 0.22wt%, MgO 0.06wt%, K₂O 3.26wt%, Na₂O 0.42wt%, TiO₂ 0.09wt%, and loss on ignition 10.63wt%.

[0031] The chemical composition of the Yixian soil used is as follows: Al2O3 12-18wt%, SiO2 68-73wt%, Fe2O3 0.1-0.5wt%, CaO 2-4wt%, MgO 3-5wt%, K2O 0.1-0.5wt%, Na2O 0.3-0.8wt%, and loss on ignition 7-12wt%. Specifically, it is Al2O3 14.26wt%, SiO2 70.18wt%, Fe2O3 0.13wt%, CaO 2.51wt%, MgO 3.47wt%, K2O 0.11wt%, Na2O 0.32wt%, and loss on ignition 9.12wt%.

[0032] The chemical composition of the quartz used is: SiO2 96-99.5wt%, Al2O3 0.3-4wt%, Fe2O3 0.01-0.2wt%, and the preferred quartz is 80-mesh quartz sand from Baotou, Inner Mongolia. Specifically, it contains SiO2 98.16wt%, Al2O3 0.79wt%, Fe2O3 0.16wt%, and CaO 0.19wt%.

[0033] The composition of the seashell composite material used is: CaO 55.55wt%, loss on ignition 43.65wt%.

[0034] The production process of the seashell synthetic material used is as follows: The shells discarded from marine aquaculture are screened to remove impurities and placed in a calcining furnace. To ensure uniform calcination, the stack thickness is controlled to be less than 30 cm, the calcination temperature is 800 degrees Celsius, and the holding time is 1.5 hours.

[0035] The calcined seashells are processed into 1500-mesh seashell powder for later use.

[0036] First, add sufficient tap water to a hexagonal reaction tank equipped with a stirring device, then slowly add shell powder to generate a calcium hydroxide solution, and age it in the tank for at least 72 hours.

[0037] Phosphoric acid is slowly added to the aging tank of the aged calcium hydroxide solution to form a precipitate of tricalcium phosphate or hydroxyapatite.

[0038] The resulting precipitate is placed in an aging chamber and aged for at least 7 days. After aging, it is dried and pulverized to 400 mesh for later use.

[0039] The aged sediment was put into a ball mill and ground for 12 hours at a mass ratio of sediment: Longyan soil: water = 20:1:20. After grinding, the moisture content was reduced to below 15% by using a sludge filter or natural air drying.

[0040] The synthetic material obtained in step 6 is placed in a calcining furnace and calcined at a temperature of 1200 degrees Celsius to form a shell-shaped synthetic material. To ensure stable shrinkage of the clay blank, the calcination temperature is controlled within a range of no more than 10 degrees Celsius above or below the predetermined temperature.

[0041] The purpose of adding Longyan clay in step 6 of this synthesis process is as follows: During the calcination of seashells into calcium oxide, which then reacts with phosphoric acid to form tricalcium phosphate, residual calcium oxide remains due to incomplete reaction. This residual calcium oxide reacts with water in the ceramic slurry to form calcium hydroxide again, increasing the slurry's alkalinity, viscosity, and fluidity, thus affecting the ceramic casting process and easily causing defects such as unevenness in the clay layer and green surface, significantly reducing production efficiency and product quality. By introducing Longyan kaolin and calcining it, the residual calcium oxide reacts with the kaolin to form a stable calcium-aluminum-silicon crystalline phase, which does not affect the subsequent forming process. Calcination of the synthesis material promotes crystal stability, reduces shrinkage after greening, and reduces defects such as cracking and deformation that easily occur during firing. The Longyan clay added in this process is 400-mesh Longyan clay that has been cleaned and washed to remove impurities.

[0042] The raw materials weighed in Examples 1-5 above are mixed with water and then wet-milled. The grinding moisture content is controlled at 50%, and the grinding is carried out until the particle size reaches a 300-mesh sieve. The mixture is then removed from the mill and placed into a hexagonal mud mixing tank. The resulting mud slurry is subjected to iron removal, sieved through a 160-mesh vibrating screen, filtered, and kneaded. It is then vacuum-kneaded into mud strips with a moisture content controlled at 23%. After aging, it is used for rolling molding. The resulting mud strips are then stirred and pulped at high speed to produce mud slurry for slip casting. The moisture content is controlled at 33%, and the specific gravity is controlled at 1.7. The mud strips are rolled or the mud slurry is used for slip casting to produce wet blanks. The wet blanks are dried and trimmed to obtain semi-finished blanks. The dried semi-finished blanks are then placed in a kiln and fired in an oxidizing flame at a firing temperature of 1290℃ for a firing cycle of 13 hours. The obtained unglazed porcelain is graded, polished, glazed, and then fired in a kiln. After firing, the finished product is a rutile titanium ore shell porcelain. Various colors can be used to decorate the finished product. The glaze used is lead-free frit glaze with a specific gravity of 1.9. The glaze layer thickness is controlled at 0.2 mm, the firing temperature is controlled at 1200℃, and the firing cycle is 8 hours.

[0043] The use of the rutile-added shell porcelain body and preparation method of the present invention has the following beneficial effects: 1. Rutile titanium dioxide is added to shell porcelain. Taking advantage of the high whiteness, low coefficient of thermal expansion and abundant mineral resources of titanium dioxide, rutile titanium dioxide is dispersed into clay materials rich in silicon dioxide and aluminum oxide. This results in shell porcelain products with a warm and jade-like porcelain body, high whiteness, high strength and good thermal shock resistance.

[0044] 2. In the conchoidal porcelain body composition with added rutile titanium and attapulgite, both types of raw materials are characterized by high whiteness after high-temperature calcination, resulting in a transparent, jade-like porcelain body with high whiteness after sintering. Furthermore, rutile titanium dioxide crystals are stable at high temperatures. When titanium dioxide disperses into materials rich in silicon dioxide, aluminum oxide, and calcium oxide, it forms a calcium-titanium-silicon-aluminum polycrystalline structure. It can also absorb free SiO2 to form TiSi2 and combine with residual CaO to form the crystalline stable CaTiO3, inhibiting the expansion of the body caused by the transformation of residual quartz crystals. The resulting crystals have excellent thermal stability. Titanium dioxide itself has a low coefficient of thermal expansion. These factors contribute to the low coefficient of thermal expansion and good thermal shock resistance of the rutile titanium ore-conchoidal porcelain body, meeting the requirements of cooking scenarios involving rapid heating and cooling. When nano-attapulgite is added to ceramic raw materials, its serrated rod-like structure plays a role in crack resistance and increasing the strength of the green body in the formed clay body; in the sintered white body, it plays a role in toughening, load bearing and strength enhancement, and plays a significant role in the thermal shock resistance and flexural strength of the white body.

[0045] The thermal shock resistance, flexural strength and water absorption test data of each embodiment and bone china are as follows: The following data are from the lowest 180°C, with each test increasing by 20°C, up to the previous test temperature at which one or more pieces showed cracks (the highest rapid cooling temperature without cracks). The test method is formulated according to GB / T3298 "Determination of Thermal Shock Resistance of Daily-use Ceramic Ware".

[0046] Example 1 No cracking after one pass from 200℃ to 20℃ 109.9 0.17 The porcelain body has a whiteness of 81, the glaze is warm and lustrous with a slight yellow tint, and it has a certain degree of translucency. Example 2 No cracking after one pass from 220℃ to 20℃ 125.6 0.16 The porcelain body has a whiteness of 82, the glaze is warm and lustrous, and it has a certain degree of translucency. Example 3 No cracking after one pass from 220℃ to 20℃ 130.1 0.16 The porcelain body has a whiteness of 82, the glaze is warm and lustrous, and it has a certain degree of translucency. Example 4 No cracking after one pass from 260℃ to 20℃ 132.29 0.08 The porcelain body has a whiteness of 86, the glaze is warm and lustrous, and the translucency is good. Example 5 No cracking after one pass from 240℃ to 20℃ 128.5 0.12 The porcelain body has a whiteness of 84, the glaze is warm and lustrous, and the translucency is good. Bone China No cracking after one pass from 140℃ to 20℃ 102.1 0.29 The porcelain body has a whiteness of 81, the glaze is warm and lustrous, and it has a certain degree of translucency. The experimental data above show that the conchoidal porcelain products of Examples 4 and 5, which incorporate rutile titanium ore and nano-attapulgite, exhibit excellent thermal shock resistance, meeting the needs of current cooking and lifestyle scenarios. They also demonstrate high flexural strength, low water absorption, high whiteness of the porcelain body, and a warm, lustrous glaze. Considering factors such as comprehensive comparison of physicochemical properties, appearance quality and whiteness, and control of production technology, Example 4 demonstrates the best results and therefore possesses significant market potential.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A type of shell-shaped porcelain body with added rutile titanium ore, characterized in that: It is made from the following raw materials in parts by weight: 16-23 parts rutile titanium ore, 2-6 parts nano attapulgite, 10-18 parts Datong clay, 3-6 parts Yixian clay, 6-8 parts Longyan clay, 3-6 parts quartz, and 37-53 parts shell composite material.

2. The shell porcelain body with added rutile titanium ore according to claim 1, characterized in that: It is made from the following raw materials in parts by weight: 19 parts rutile titanium ore, 5 parts nano attapulgite, 15 parts Datong clay, 5 parts Yixian clay, 7 parts Longyan clay, 6 parts quartz, and 43 parts shell composite material.

3. A method for preparing a shell-shaped porcelain body with added rutile titanium ore, characterized in that: Includes the following steps: (1) Preparation of shell synthetic material: Calcine the shells; process the calcined shells into shell powder; add tap water to the reaction tank first, then add the shell powder to generate calcium hydroxide solution, and age it in the tank; add phosphoric acid to the aged calcium hydroxide solution in the aging tank to form tricalcium phosphate or hydroxyapatite precipitate; age the precipitate, and then dry and pulverize it for later use; grind the aged precipitate according to the mass ratio of precipitate: Longyan soil: water = 20:1:20; calcine the synthetic material obtained above to form shell synthetic material. (2) Quantitative weighing: rutile titanium ore, nano-attapulgite, shell synthetic material, Longyan soil, Datong soil, Yixian soil and quartz are weighed quantitatively respectively; (3) Mud preparation: After mixing the various raw materials weighed in step (2) with water, wet ball milling is carried out. The grinding moisture is controlled at 45-55%, and the particle size is ground to 275-325 mesh. After exiting the mill, it is placed into the mud mixing tank. (4) Clay strip preparation: The mud slurry obtained in step (3) is removed from iron, sieved through a 150-180 mesh vibrating screen, filtered, kneaded, and vacuum kneaded into clay strips. The moisture content is controlled at 21-24%, and after aging, it is used for rolling molding. (5) Molding: Roll the clay strips from step (4) to form a wet blank, or mix the clay strips from step (4) at high speed to make a slurry. The moisture content is controlled at 30-35% and the specific gravity is controlled at 1.6-1.

75. The slurry is then poured to form a wet blank. (6) Drying and trimming: Dry and trim the wet blank obtained in step (5) to obtain a semi-finished blank; (7) High-temperature single firing: The semi-finished blanks dried in step (6) are placed in a kiln and fired in an oxidizing flame at a temperature of 1270-1310℃ for 10-15 hours. (8) High-temperature secondary firing: The plain porcelain obtained in step (7) is graded, polished, glazed and then fired in a kiln. After exiting the kiln, the finished product of rutile titanium ore shell porcelain is obtained. Color decoration is applied to the finished product. Lead-free frit glaze is used as the glaze material. The specific gravity of the frit glaze is 1.80-2.

00. The glaze layer thickness is controlled at 0.18-0.22mm. The firing temperature is controlled at 1180-1220℃. The firing cycle is 7-10 hours.

4. The method for preparing the shell porcelain body with added rutile titanium ore according to claim 3, characterized in that: In step (1), the thickness of the calcined shells is controlled below 30 cm, the calcination temperature is 700-1100℃, and the holding time is 1-2 hours; the calcined shells are processed into shell powder of 1000-2000 mesh; the calcium hydroxide solution is aged in the pool for at least 72 hours; the generated precipitate is aged for at least 7 days, and then crushed to 400 mesh; the mixture is ground for 12 hours, and the moisture content of the ground synthetic material is reduced to below 15%; The calcination temperature of the synthetic material is controlled at 1100-1300℃.

5. The method for preparing shell porcelain body with added rutile titanium ore according to claim 4, characterized in that: in In step (1), the shell calcination temperature is 900℃ and the holding time is 1.5 hours; the calcined shell is processed into 1600 mesh shell powder; the calcination temperature of the synthetic material is controlled at 1200℃.

6. The method for preparing the shell porcelain body with added rutile titanium ore according to claim 3, characterized in that: In step (3), the grinding moisture is controlled at 50% and the particle size is ground to a 300-mesh sieve.

7. The method for preparing shell porcelain body with added rutile titanium ore according to claim 3, characterized in that: in In step (4), the mud is filtered and kneaded after being sieved through a 165-mesh vibrating screen, and the moisture content of the mud strips is controlled at 23%.

8. The method for preparing the shell porcelain body with added rutile titanium ore according to claim 3, characterized in that: In step (5), the moisture content of the mud slurry is controlled at 33%, and the specific gravity is controlled at 1.

7.

9. The method for preparing the shell porcelain body with added rutile titanium ore according to claim 3, characterized in that: In step (7), the firing temperature is 1290°C and the firing cycle is 13 hours.

10. The method for preparing the shell porcelain body with added rutile titanium ore according to claim 3, characterized in that: In step (8), the specific gravity of the frit glaze is 1.9, the glaze layer thickness is controlled at 0.2 mm, the firing temperature is controlled at 1200℃, and the firing cycle is 8 hours.