SU1144983A1 - Ceramic compound for manufacturing facing tiles - Google Patents

Abstract

CERAMIC MASS FOR MAKING FACADE TILES, including clay, diatomite, broken glass and tiled combat, characterized in that, in order to increase the thermal expansion coefficient of products, it additionally contains bentonite in the following ratio, wt.%: Clay fusible 15-30 Diatomite 45-60 Cullet15-20 Tile Combat 5-10 Bentonite2-5

Description

i. The invention relates to nostch building materials and can be used for the production of facade cladding tiles on flow-conveyor lines. Modern technology for the production of ceramic tiles is widely used for precision conveyor lines with slit roller kilns having a high-speed firing mode. In such firing modes, one of the difficulties is to obtain a skull with a high thermal expansion coefficient, since the decrease in the CTE of tiled masses at high-speed firing regimes violates the correspondence between the crock and glaze, which causes the occurrence of stresses and tseka on the glaze surface It is necessary to use the mass of active sintering with an increased thermal expansion coefficient. The known ceramic mass for the manufacture of facade tiles, containing, in May,%: Glyn . 40-60 Diatomit10-20 Nepheline-syenite 30-40 ij. A disadvantage of the known mass is high shrinkage, which leads to the deformation of products. , Closest to the proposed. is a ceramic mass for. manufacture of facade tiles including the following components, wt.% Clay Maykopskaya 25 Clay Veselovskaya. . 20 Diatomite 10 Cullet 10 Tile combat 10 Nepheline-syenite 25 2j. The disadvantage of this mass is the low coefficient of thermal expansion of the shard (6.4 ± 10 degrees), as a result of which a fracture grid () is formed on the surface of the float during subsequent glazing. The appearance of the tiles is determined by the quality of their glazing surface The surface of the glaze reduces the gloss and impairs the marketability of the tiles. The purpose of the invention is to increase the coefficient of thermal expansion of the products. 3 The goal is achieved by the fact that the ceramic mass for the manufacture of tiles includes clay, danatomite, glass and tiled combat, additionally contains bentonite in the following ratio of components, wt.%: Clay fusible 15-30 Diatomite 45-60 Cullet 15-20 in the process of firing creates special conditions for the emergence of tumors in the shard, giving it new properties that increase the coefficients (1k) Thermal expansion of the shard, which is very important when covering the surface of the skull ka glaze. Glazed tiles from the proposed composition have a smooth smooth surface (without tseka and nakolov). I ... The presence of bentonite and low-melting clay in the indicated ratios improves the forming properties of the press powder. In addition, slabs are used as fireclay, which allows maximum utilization of production wastes. Ceramic mass based on these components is prepared by slip method. An example. In a ball mill I, the tomb break and the cullet are crushed to a residue of 3-4% on sieve No. 0063. Then clay ma-terial, diatomite, bentonite are loaded and the required amount of water is calculated based on the moisture content of the slip, 4650%. Electrolytes are introduced with water — liquid glass in an amount of 0.2% and soda — 0.1% (over 100% by dry weight). The slip is broken to a residue of 1-2% on a sieve of 10,000 6tv / cm. Then the slurry is dehydrated to obtain a press powder with a moisture content of 6.0-6.5%. From the prepared powder, tiles are pressed on the press. KRKp-125 at a primary pressure of 3-3.5 MPa and a secondary pressure of 11-12 MPa. Dried and burned plates3114498 .3

ki on high-speed modes on a later- in a roller furnace during 50-60 no-conveyor lines at the next min.

technology: drying at 180-240 ° c. The compositions of ceramic masses for the duration of 20-25 minutes until the moisture content of the preparation of facade tiles is 0.3-0.4%; roasting at 1050С 5 .1 in table. one.

Components Content, wt.%

Fusible clay 15 30 16.5

Diatomite604550

Cullet151520

Slabboy 510

Bentonite52 3fj

The charge masses of each composition are from-3 MPa, with a secondary pressure

grind down wet with a method of 12 MPa. Pressed tiles with

in a ball mill until final-230 C is dried for 20 minutes,

2% residue on a roller dryer dryer to a moisture content of

10,000 holes / cm. The humidity of the slip is 30 °, 5% and is burned at 46%. The slip is dried to a humidity of 60 minutes in a roller oven. 6%. From the received press-physicomechanical properties

The powder is pressed tiles on the press KRKp-and the mode of processing tiles are given

125 at primary pressure equal to table. 2. Name Prototype .Predlagable

Composition, wt.%

Clay fusible

Diatomite

Broken glass

Nepheline syenite

Fireclay (tiled combat)

Bentonite We handle and:

1050

.Firing temperature, С

T a

in composition

.Table 2

1 AND P1

30 45 15

16.5

50

20

eight

10 3.5

2

1050

1050

1050

continuation of table 2

Roasting time, min C in O and C in a: Water absorption,%

-H

,-one

KTR, 10 gr-hell

Flexural strength MPa

Frost resistance, cycles In appearance, ceramic tiles of the proposed mass of red, have a smooth surface, in terms of physical and mechanical properties, they meet the requirements of GOST 13996-77. The high coefficient of thermal expansion of the shard allows it to be used to coat the surface of PL-60

60 6, 7

6.3 10.0

11.5

34.0

36.1 50

50 current as fritted and nonfritted glaze without tsetting and tilting. In addition, the use of diatomite as the main raw material in the production of tiles makes it possible to expand the raw material base and reduce the consumption of scarce refractory kaolin-hydromica clay.

Claims (1)

CERAMIC MASS FOR FACADE TILES PRODUCTION, including clay, diatomite, cullet and tile battle, characterized in that, in order to increase the coefficient of thermal expansion, of the products, it additionally contains bentonite in the following ratio of components, wt.%: Light alloy clay kaya 15-30 Diatomite 45-60 Cullet 15-20 Tile Fight 5-10 Bentonite 2-5—. ω