Preparation method of Beijing brick ceramic

Abstract

The invention relates to a Beijing brick ceramic preparation method, which comprises: preparing a green body, weighing 25-35% by weight of kaolin, 35-40% by weight of potassium-sodium feldspar, 3-5% by weight of a high aluminum material, 5-6% by weight of anorthite and 1% by weight of a grinding aid additive, mixing, and ball-milling until the particle size D50 of the powder is less than or equal to 10 [mu] m to prepare a slurry; removing iron from the slurry through a 120-mesh sieve, and performing spray drying to obtain green body dry powder with the water content of 8-10%; surface effect treatment: bidirectionally pressurizing the green body dry powder by using a hydraulic press; and polishing, wherein a diamond grinding block and a fiber grinding block are combined for polishing. On the basis of wear resistance, skid resistance and light sensation optimization, the water-repellent anti-fouling polished tile synchronously has high mechanical strength and water-repellent anti-fouling property, can break through the application limitation of traditional polished tiles, is suitable for scenes such as historic building repair and cultural relic protection which have high requirements on cultural restoration, and also has good water-repellent anti-fouling performance. And the method can also be used for scenes with requirements on performance and texture, such as corridors, kindergarten activity rooms, high-end villa whole houses and the like.

Description

Technical Field

[0001] This invention relates to the field of ceramic preparation technology, and in particular to a method for preparing Beijing brick ceramics. Background Technology

[0002] As an important carrier of traditional architectural culture, Beijing bricks hold an irreplaceable position in fields such as ancient building restoration and high-end interior decoration due to their delicate texture, warm luster, and profound cultural connotations. However, the traditional production process of Beijing bricks is complex and time-consuming, and the finished products are easily affected by the environment, resulting in problems such as wear and water seepage. This makes it difficult to meet the high requirements of modern architecture for materials in terms of wear resistance, slip resistance, and weather resistance.

[0003] In existing technologies, improvements to ceramic products often focus on controlling raw material costs or enhancing single performance characteristics. While some improvement schemes introduce wear-resistant coatings or composite materials, these can easily cause Beijing bricks to lose their traditional luster or hinder large-scale production due to complex processes. Therefore, there is an urgent need for a preparation method that can both restore the artistic features of traditional Beijing bricks through modern ceramic processes and significantly improve their anti-slip, anti-fouling, hydrophobic, and mechanical strength, thus resolving the contradiction between traditional techniques and modern needs. Summary of the Invention

[0004] This invention provides a method for preparing Beijing brick ceramics to solve the above-mentioned problems.

[0005] The present invention adopts the following technical solution: A method for preparing Beijing brick ceramics includes the following steps: For green body preparation, weigh 25%-35% kaolin, 35%-40% potassium and sodium feldspar, 3%-5% high-alumina material, 5%-6% calcium feldspar and 1% grinding aid by weight percentage, mix and ball mill until the powder particle size D50≤10μm to make a slurry; after iron removal by 120 mesh sieve, spray dry to obtain green body dry powder with a moisture content of 8%-10%; For surface treatment, the dry powder of the blank is pressed in both directions by a hydraulic press at 30-35MPa and held for 15-20s before being shaped. It is then dried with gradient temperature increase until the moisture content is ≤1%. Subsequently, a surface glaze is applied, an antique texture is digitally printed, and a protective glaze is applied under a bell jar. Finally, it is fired in a roller kiln at 1150-1200℃ and held for 2 hours. Polishing is performed using a combination of diamond and fiber abrasive blocks, with polishing pressure controlled at 10-20 N / cm² and rotation speed at 1500-2000 r / min. The final product has a gloss level of 20-50 degrees, a dry friction coefficient ≥0.6, and a water contact angle ≥110°.

[0006] Furthermore, the mass ratio of potassium feldspar to sodium feldspar in the above-mentioned potassium-sodium feldspar is 2:1.

[0007] Furthermore, the aforementioned high-alumina material is α-alumina with an aluminum content ≥92%.

[0008] Furthermore, the aforementioned grinding aid additive is a polycarboxylate ammonium salt with a molecular weight of 8000-10000.

[0009] Furthermore, the formula of the above-mentioned protective glaze is as follows by weight percentage: quartz 25%, feldspar 30%, zinc oxide 5%, titanium dioxide 3%, zircon sand 15%, and clay 22%.

[0010] Furthermore, the amount of protective glaze applied to the bell jar is 80-100 g / m².

[0011] Furthermore, in the above polishing steps, the processing time for each pass of the diamond abrasive block is 30-40 seconds, and the processing time for each pass of the fiber abrasive block is 20-30 seconds. The surface flatness of the finished product after polishing is ≤0.1mm / m.

[0012] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages: This invention, based on wear resistance, slip resistance, and optimized light feel, simultaneously possesses high mechanical strength and hydrophobic and stain-resistant properties. It can break through the application limitations of traditional polished tiles and is suitable for scenarios with high requirements for "cultural restoration," such as ancient building restoration and cultural relic protection. It can also be used in scenarios with requirements for both performance and texture, such as corridors, kindergarten activity rooms, and the entire house of high-end villas. Detailed Implementation

[0013] Example 1: A method for preparing Beijing brick ceramics includes the following steps: For green body preparation, weigh 25% kaolin, 35% potassium and sodium feldspar, 3% high-alumina material, 5% calcium feldspar and 1% grinding aid by weight percentage, mix and ball mill until the powder particle size D50≤10μm to make slurry; after removing iron from the slurry through a 120-mesh sieve, spray dry to obtain green body dry powder with a moisture content of 8%; For surface treatment, the dry powder of the blank is pressed in both directions by a hydraulic press at 30MPa and held for 15s before being shaped. It is then dried with gradient temperature increase until the moisture content is ≤1%. Subsequently, a surface glaze is applied, an antique texture is digitally printed, and a protective glaze is applied under a bell jar. Finally, it is fired at 1150℃ in a roller kiln and held for 2 hours. Polishing is performed using a combination of diamond and fiber abrasive blocks, with the polishing pressure controlled at 10 N / cm² and the rotation speed at 1500 r / min. The final product has a gloss level of 20 degrees, a dry friction coefficient ≥0.6, and a water contact angle ≥110°.

[0014] The mass ratio of potassium feldspar to sodium feldspar in the above-mentioned potassium-sodium feldspar is 2:1.

[0015] The above-mentioned high-alumina material is α-alumina with an aluminum content of ≥92%.

[0016] The aforementioned grinding aid additive is a polycarboxylate ammonium salt with a molecular weight of 8000.

[0017] The formula of the above protective glaze by weight percentage is: quartz 25%, feldspar 30%, zinc oxide 5%, titanium dioxide 3%, zircon sand 15%, and clay 22%.

[0018] The amount of protective glaze applied to the bell jar is 80g / m².

[0019] In the above polishing steps, the processing time for each diamond abrasive block is 30 seconds, and the processing time for each fiber abrasive block is 20 seconds. The surface flatness of the finished product after polishing is ≤0.1mm / m.

[0020] Example 2: A method for preparing Beijing brick ceramics includes the following steps: For green body preparation, weigh 35% kaolin, 40% potassium and sodium feldspar, 5% high-alumina material, 6% calcium feldspar and 1% grinding aid by weight percentage, mix and ball mill until the powder particle size D50≤10μm to make slurry; after iron removal by 120 mesh sieve, spray dry to obtain green body dry powder with a moisture content of 8%-10%; For surface treatment, the dry powder of the blank is pressed bidirectionally by a hydraulic press at 35MPa and held for 20s before being shaped. It is then dried with gradient temperature increase until the moisture content is ≤1%. Subsequently, a surface glaze is applied, an antique texture is digitally printed, and a protective glaze is applied under a bell jar. Finally, it is fired in a roller kiln at 1150-1200℃ and held for 2 hours. Polishing is performed using a combination of diamond and fiber abrasive blocks, with the polishing pressure controlled at 20 N / cm² and the rotation speed at 2000 r / min. The final product has a gloss level of 50 degrees, a dry friction coefficient ≥0.6, and a water contact angle ≥110°.

[0021] The mass ratio of potassium feldspar to sodium feldspar in the above-mentioned potassium-sodium feldspar is 2:1.

[0022] The above-mentioned high-alumina material is α-alumina with an aluminum content of ≥92%.

[0023] The aforementioned grinding aid additive is a polycarboxylate ammonium salt with a molecular weight of 10,000.

[0024] The formula of the above protective glaze by weight percentage is: quartz 25%, feldspar 30%, zinc oxide 5%, titanium dioxide 3%, zircon sand 15%, and clay 22%.

[0025] The amount of protective glaze applied to the bell jar is 100g / m².

[0026] In the above polishing steps, the processing time for each diamond abrasive block is 40 seconds, and the processing time for each fiber abrasive block is 30 seconds. The surface flatness of the finished product after polishing is ≤0.1mm / m.

[0027] The performance of Embodiments 1 and 2 of the present invention was compared with that of the conventional process, and the results are shown in the table below: The finished products of Examples 1 and 2 of this invention have a gloss level controlled between 28 and 45 degrees, which conforms to the natural texture of traditional Beijing bricks. They have better anti-slip performance than traditional processes and better wear resistance.

[0028] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A method for preparing Beijing brick ceramics, characterized in that, Includes the following steps: For green body preparation, weigh 25%-35% kaolin, 35%-40% potassium and sodium feldspar, 3%-5% high-alumina material, 5%-6% calcium feldspar and 1% grinding aid by weight percentage, mix and ball mill until the powder particle size D50≤10μm to make slurry; after removing iron from the slurry through a 120-mesh sieve, spray dry to obtain green body dry powder with a moisture content of 8%-10%; For surface treatment, the dry powder of the blank is pressed in both directions by a hydraulic press at 30-35MPa and held for 15-20s before being shaped. It is then dried with gradient temperature increase until the moisture content is ≤1%. Subsequently, a surface glaze is applied, an antique texture is digitally printed, and a protective glaze is applied under a bell jar. Finally, it is fired in a roller kiln at 1150-1200℃ and held for 2 hours. Polishing is performed using a combination of diamond and fiber abrasive blocks, with polishing pressure controlled at 10-20 N / cm² and rotation speed at 1500-2000 r / min. The final product has a gloss level of 20-50 degrees, a dry friction coefficient ≥0.6, and a water contact angle ≥110°.

2. The method for preparing Beijing brick ceramics as described in claim 1, characterized in that: The mass ratio of potassium feldspar to sodium feldspar in the potassium-sodium feldspar is 2:

1.

3. The method for preparing Beijing brick ceramics as described in claim 1, characterized in that: The high-alumina material is α-alumina with an aluminum content of ≥92%.

4. The method for preparing Beijing brick ceramics as described in claim 1, characterized in that: The grinding aid additive is a polycarboxylate ammonium salt with a molecular weight of 8000-10000.

5. The method for preparing Beijing brick ceramics as described in claim 1, characterized in that: The protective glaze is formulated by weight percentage as follows: quartz 25%, feldspar 30%, zinc oxide 5%, titanium dioxide 3%, zircon sand 15%, and clay 22%.

6. The method for preparing Beijing brick ceramics as described in claim 1, characterized in that: The amount of protective glaze applied to the bell jar is 80-100 g / m².

7. The method for preparing Beijing brick ceramics as described in claim 1, characterized in that: In the polishing step, the processing time for each pass of the diamond abrasive block is 30-40 seconds, and the processing time for each pass of the fiber abrasive block is 20-30 seconds. The surface flatness of the finished product after polishing is ≤0.1mm / m.

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