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Production process of unfired building ceramic

A technology for building ceramics and production technology, which is applied in the field of building materials to achieve the effects of simple production technology, low price and low production cost

Active Publication Date: 2015-01-28
周俊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a production process of fire-free architectural ceramics that uses gypsum as a raw material and does not require high-temperature firing for the above-mentioned deficiencies in the existing firing technology of architectural ceramics, which has the advantages of low cost and simple process. , low energy consumption, light pollution and other technical advantages

Method used

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  • Production process of unfired building ceramic

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Experimental program
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Effect test

Embodiment 1

[0031] (1) Drying and dehydration: dry and dehydrate natural gypsum at 150°C for 6 hours under normal pressure to obtain hemihydrate gypsum;

[0032] (2) Compression molding: Mix the hemihydrate gypsum obtained in step (1) with water at a mass ratio of 100:6, and stir quickly evenly, then immediately fill the obtained hemihydrate gypsum mixed with water into the ceramic brick press, and Press molding under 30MPa pressure to obtain pottery blank;

[0033] (3) Soaking water for hydration: stack the pottery blanks obtained in step (2) together, the number of overlaps is 10, use cotton cloth to separate the pottery blanks, and put them in a hydration tank; then put the stacked pottery blanks together with The hydration tank is placed under the press together, and the same pressure as that in step (2) is applied by the press; keep the pressure constant, feed water into the hydration tank, and soak the ceramic blank for 1 hour;

[0034] (4) Natural drying: remove the pressure, take...

Embodiment 2

[0038] (1) Drying and dehydration: dry and dehydrate natural gypsum at 160°C for 4 hours under normal pressure to obtain hemihydrate gypsum;

[0039] (2) Compression molding: Mix the hemihydrate gypsum obtained in step (1) with water at a mass ratio of 100:10, and stir quickly and evenly, then immediately fill the obtained hemihydrate gypsum into the ceramic brick press, and Compression molding under 25MPa pressure to obtain pottery blank;

[0040] (3) Soak water for hydration: stack the pottery blanks obtained in step (2) together, the number of overlaps is 20, use cotton cloth to separate the pottery blanks, and put them into a hydration tank; then put the stacked pottery blanks together with The hydration tank is placed under the press together, and the same pressure as that in step (2) is applied by the press; keep the pressure constant, feed water into the hydration tank, and soak the ceramic blank for 1.5 hours;

[0041] (4) Natural drying: remove the pressure, take out...

Embodiment 3

[0044] (1) Drying and dehydration: drying and dehydrating desulfurized gypsum (containing 93 wt% calcium sulfate dihydrate) at 170° C. under normal pressure for 2 hours to obtain hemihydrate gypsum;

[0045] (2) Compression molding: mix the hemihydrate gypsum obtained in step (1) with water at a mass ratio of 100:20, and stir quickly and evenly, then immediately fill the obtained hemihydrate gypsum into the ceramic brick press, and Press molding under 20MPa pressure to obtain pottery blank;

[0046] (3) Soaking water for hydration: stack the pottery blanks obtained in step (2) together, the number of overlaps is 40, use cotton cloth to separate the pottery blanks, and put them into a hydration tank; then put the stacked pottery blanks together with The hydration tank is placed under the press together, and the same pressure as that in step (2) is applied by the press; keep the pressure constant, feed water into the hydration tank, and soak the ceramic blank for 2 hours;

[00...

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Abstract

The invention relates to a production process of unfired building ceramic. The production process comprises the following steps: (1) drying and dehydrating: drying and dehydrating gypsum to obtain semi-hydrated gypsum; (2) carrying out compression moulding: mixing the semi-hydrated gypsum with water in a mass ratio of 100 to (6-25) and quickly stirring uniformly, and then carrying out compression moulding to obtain ceramic blanks; (3) soaking in water to hydrate: overlying the obtained ceramic blanks which are separated by cotton cloth, putting the ceramic blanks into a hydrating slot, and putting the overlaid ceramic blanks and the hydrating slot under a press, applying pressures by virtue of the press, maintaining the pressure unchanged, introducing water into the hydrating slot and soaking the ceramic blanks for 1-3 hours; and (4) naturally drying. By using gypsum as a raw material, the production process of unfired building ceramic is low in production cost, simple in process and free of high-temperature firing and has better energy conservation and emission reduction effects, and the prepared unfired building ceramic is good in performance.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a production process of non-fired building ceramics. Background technique [0002] Architectural ceramics are a kind of architectural decoration materials, which are often used for wall and floor decoration. The raw materials for the production of conventional architectural ceramics are mainly composed of clay, quartz, feldspar and so on. Its production steps generally include batching, wet ball milling, spray drying and granulation at 400-600°C, compression molding, and high-temperature firing at 1100-1250°C. Among them, a large amount of heat is consumed in the spray drying granulation and high-temperature firing sections, and exhaust gas after fuel combustion is emitted at the same time, which has problems such as high energy consumption and heavy pollution. [0003] Obviously, if ceramic products can be produced without spray drying and high-temperature sintering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 周俊李天天于冬雪舒杼王焰新
Owner 周俊
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