Powder for ceramic tile dry press forming and preparation method thereof
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A technology of dry pressing and ceramic bricks, which is applied in the field of ceramic dry powder, which can solve the problems of poor powder fluidity and easy blockage of the distribution port, and achieve the effects of enhanced strength, avoiding delamination, and good fluidity
Active Publication Date: 2017-11-10
FOSHAN DONGPENG CERAMIC +3
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Dry powder and dry pressing decoration technology In order to make the decorative pattern on the brick surface have higher precision and fineness, the particle size of the powder must be smaller than that of ordinary powder. However, the preparation of dry pressing dry powder must overcome the electrostatic interaction between the powder , the finer the powder, the greater the electrostatic interaction with each other. Under the electrostatic effect, the fluidity of the powder will be poor, and it will easily block the cloth opening
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[0032] Further explanation, a powder preparation method for dry pressing of ceramic tiles, comprising the following steps:
[0033] A. Slurry preparation: Add 0.01-0.02% polyvinyl alcohol to the ceramic slurry, the water content of the ceramic slurry is 35-38%, and the fineness of the ceramic slurry is: 200g of the ceramic slurry is passed through a 250-mesh sieve, sieved The remaining 3-10g;
[0034] B. Spray milling to obtain powder.
[0035] Further explanation, the slurry feeding pressure set in the spray pulverization is 0.9-1.2Mpa, the air pressure is 0.5-0.7Mpa, and the nozzle diameter is 1-2.2mm.
[0036] During the preparation process, polyvinyl alcohol is added to the ceramic slurry to improve the internal cohesion of the dry powder particles and make it easier to form a film with a smooth surface, and by increasing the amount of water added, the ceramic slurry is diluted and transported to Spray drying is carried out in the spray tower. The moisture content of the...
Embodiment 1
[0045] The raw materials of the ceramic slurry are proportioned according to the following mass fractions: washed soda stone 2%, potassium sand 25.6%, stone particles 15.4%, C83 washed black mud 2%, ore washed black mud 13%, black talc 3.5% , polyvinyl alcohol 0.01%, lignin 0.24%, sodium metasilicate 0.25%, water 38%.
[0046] According to the above raw material formula, batching and ball milling are carried out. For the ball milling process, the tonnage of the ball mill is 18T, the material of the ball stones is medium aluminum balls, the proportion of the ball stones is φ50mm:φ60mm=0.8:1, the number of ball stones is 15T, and the ball milling time is After 15 hours, a ceramic slurry containing polyvinyl alcohol was obtained. The fineness of the slurry was 200g. The ceramic slurry was passed through a 250-mesh sieve, and 7g remained after the sieve. The moisture content of the slurry was 38%, and the fluidity of the slurry was 37 seconds (volt cup).
[0047] preferred embodim...
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Abstract
The invention relates to powder for ceramic tile dry press forming and a preparation method thereof. The powder is particles with smooth surface and flowability, which are obtained by performing spray drying on a slurry prepared from a polyvinyl-alcohol-containing ceramic raw material; and the water content of the powder is less than or equal to 1%. The preparation method of the powder for ceramic tile dry press forming comprises the following steps: A. slurry preparation: adding 0.01-0.02% of polyvinyl alcohol into a ceramic slurry, wherein the water content of the ceramic slurry is 35-38%, and the fineness of the ceramic slurry is: after 200g of the ceramic slurry passes through a 250-mesh screen, the screen residue is 3-10g; and b. performing spray pulverization to obtain the powder. The powder for ceramic tile dry press forming has the advantages of smooth particle surface, high binding property, low electrostatic force among particles, and favorable flowability. In addition, the invention also provides a preparation method of the dry powder for ceramic tile dry press forming; according to the method, a low water content of dry powder particles can still be obtained after the water amount is increased; and the continuous production of the dry powder particles can also be ensured.
Description
technical field [0001] The invention relates to the technical field of ceramic dry powder, in particular to a powder for dry pressing of ceramic bricks and a preparation method thereof. Background technique [0002] Dry powder dry pressing technology is a high-end decorative technology for ceramic tiles. The dry powder dry pressing decorative effect is different from traditional screen, roller, and even inkjet. The decorative effect is three-dimensional, rich in layers, and diverse in patterns. Dry powder and dry pressing decoration technology In order to make the decorative pattern on the brick surface have higher precision and fineness, the particle size of the powder must be smaller than that of ordinary powder. However, the preparation of dry pressing dry powder must overcome the electrostatic interaction between the powder , The finer the powder, the greater the electrostatic interaction with each other. Under the electrostatic effect, the fluidity of the powder will be...
Claims
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