SU1108083A1 - Castable slip composition (modifications) - Google Patents

Abstract

1. The composition of the casting slip for the manufacture of ceramic products, mainly maiolic, including clay, nepheline-syenite concentrate, kaolin, quartz sand, chamotte, water glass and soda ash, in order to reduce water absorption and improve the heat resistance of products, it additionally contains dehydrated clay in the following ratio of components, wt.%: 24.8-37.0 Clay Nepheline-syenitic 27.0-28.0 concentrate 15-24.6 Kaolin 10-13 Quartz sand 5-7 Chamot 0.1 -0,2 Liquid glass Soda kaltsiniro0, 1-0,2 bath Dehydrated 3.2-4.8 clay 2. Composition of foundry slip for the manufacture of ceramic products, mainly majolica, including clay, kaolin, broken glass, quartz sand, Schmot, nepheline-syente concentrate, liquid glass and soda ash, about and due to the fact that, in order to reduce water absorption and increase the heat resistance of products, it contains additionally dehydrated clay and dehydrated kaolin in the following ratio of components, wt.%: Clay9.2-13.8 Kaolin22.2-29.4 Cullet 4, 4-6.6 Quartz sand24,2-26,6 ammunition; 14.6-16.4 Nepheline-syenite concentrate .10.0-15.0 SD 00 Liquid glass 0.1-0.2 Soda ash 0.1-0.2 o Dehydrated 00 clay2.0-3, 0 Dehydrated SAE kaolin 0.8-1.2

Description

The invention relates to building materials and can be used in the manufacture of consumer ceramic products in factories producing ceramic facing and majolica products.

Known casting slip-for the production of fassware, including,% 1 clay 19; sand 33; kaolin 28; fs fight 20; cobalt sulfate 0.4; soda ash 0.1 and liquid glass 0.2 fl3.

The disadvantages of this slurry are the use of expensive scarce raw materials, a significant grinding time, and a high firing temperature.

The closest to the invention is the composition of the casting slip, including the following components, wt%:

Clay5

Kaolin10

Fireclay15

Quartz sand 10

Nepheline concentrate 30

Cullet 30

Soda Ash 0.1-0.2

Liquid glass O, 2 (over 100%

The disadvantages of this composition of the slip are relatively high water absorption and low temperature resistance of products,

The purpose of the invention is to reduce water absorption and increase the heat resistance of products.

This goal is achieved by the fact that the composition of the casting slip for the manufacture of ceramic products, mainly majolica, including clay, nepheline-syenite concentrate, kaolin, quartz sand, chamotte, liquid glass and soda ash, also contains dehydrated clay at the following ratio of components, wt.% ..

Clay 24.8-37.0

Nepheline-syeni- -. .

commercial concentrate 27.0-28.0

Kaolin 15-24,6.

Quartz sand 10-13

Chamotte. 5-7

Liquid glass 0.1-0.2

Kaptsinirov's soda (na. 0,1-0,2

Dehydrated clay3,2-4,8

According to the second variant, the composition of the casting slip for the manufacture of ceramic products, mainly majolica, including clay, KAOLIN, cullet, quartz sand, chamotte, nepheline concentrate, liquid glass and soda ash, also contains dehydrated clay and 17% of the total content: wt.%:

Clay9,2-13,8

Kaolin22.2-29.4

Cullet, 4.4-6.6 Quartz sand 24.2-26.6 Shamot14.6-16.4

Nepheline-syenitic concentrate 10.0-15.0 Liquid glass 0.1-0.2 Soda ash 0, 1-0.2 Dehydrated oil and clay2.0-3.0 Dehydrated kaolin 0.8-1.2 When preparing the compositions casting slips can be used as natural raw materials: clay, kaolin, nepheline-syenite, quartz sand, and waste generated during pressing and drying of ceramic tiles, which are introduced into the slip in an amount of 40-60 wt.%.

In particular, in the case of the use of metal tiles waste, the waste includes clay 62, dehydrated clay 8 and nepheline-senienite 30.

If waste products from facing tiles are used, they include clay 23, dehydrated clay 5, kaolin 12, dehydrated kaolin 2, cullet 11, silica sand 28 and chamotte 19.

In the preparation of casting slurries, wet grinding and mixing of clay components, desiccants, fluxes and electrolytes is carried out, and clay, kaolin, quartz sand, calcified soda and soda are placed at the first loading of a ball mill and ground during 80-90 minutes to a residue on a sieve of 10,000 otv / cm

Then, waste from the production of ceramic tiles (either cementing or facing) from drying press powders and pressing f is poured into the same mill and crushed for 30–40 minutes to a residue of 5–6% on a sieve of 10,000 resp / cm at a moisture content of 32 -34%.

Then the products are poured into porous forms, dried, and the products from this slip are fired at. lb30-1060C. .

Duration of grinding the first boot 80-90 minutes. The residue on the sieve of 10,000 holes in the range of 10-14% is due to the fact that the subsequent addition of ceramic waste from the SUSHCHKI press stations and pressing to the same mill reduces this residue in the composition of the prepared slip as a whole and in the process. of waste with simultaneous domol of the emaciated part of the charge to a residue on a sieve of 10,000 holes / cm within 5-6% 1

With a finer grinding of the casting slip, its filtration properties are deteriorated, the time for the recruitment of the skull in plaster molds increases, the products during the filling and drying process are prone to deformation.

In case of larger grinding of the casting slip in the process of applying the liquid and drying the products, they tend to form cracks, to undermine the attachments, the quality of the treatment of the basements is deteriorated by the method of moisture cleaning - roughness and air bubbles are formed on the surface.

The optimum moisture content of the casting slip is 32-34%. With a higher viscosity, the crock set in plaster molds deteriorates, the plaster mold turnover decreases, the drying process becomes longer. At lower

the moisture of the casting slip is lost, its fluidity is required, a longer holding in plaster molds is required, the mechanical strength of the raw material is reduced.

The compositions of the casting slips for making majolica products are given in Table. one.

The results of the physico-mechanical 0 tests are given in Table. 2

As can be seen from the table. 2, majolica products have low water absorption, which reduces the consumption of glaze during the glazing process, and high heat resistance ensures the elimination of cracks on the surface of products and increases their mechanical strength.

In addition, in the preparation of the Q-slip, irretrievable ceramic waste is used instead of the scarce raw material, significantly reduced. grinding time, which reduces energy costs. .IT a b l and c a 1

Option I Clay

Dehydrated clay

Nepheline-syenite conc

Kaolin

Sand

Fireclay

Liquid glass

Soda Xenozine

Ji option

Clay

Dehydrated clay .Kaolin

Dehydrated Kaoli Glass Sand Chamotte

Nepheline-syenitic - end Liquid glass Soda calcined

24.8

7.0

25.2

4.8 4.6

3.20 28.0 7.00

27.6

22.8 24.6 5.0 10.0

13.0 2.6

7.0 6.9 5.0

0.2 0.15 0.1 0.2 0.15

0.1

13.8

11.5

9.20

3.00 2.5 2.00 22.2 25.9 9.4, 80 1.00 1.20 6.6 5.5

4.40 26.6 25.4 4.20 16.4 15.4 4.6 4.6 10.0 12.5 5.0 0.15 0.10 0.20 0.15 0.10 0.20

table 2

Claims (2)

COMPOSITION OF A CASTING SLIPER (ITS OPTIONS). 1. The composition of the casting slip for the manufacture of ceramic products, mainly majolica, including clay, nepheline-syenite concentrate, kaolin, quartz sand, chamotte, liquid glass and soda ash, characterized in that, in order to reduce water absorption and increase the heat resistance of products, it additionally contains de2. The composition of the casting slip for the manufacture of ceramic products, mainly majolica, including clay, kaolin, cullet, quartz sand, chamotte, nepheline-syenite concentrate, water glass and soda ash, which is so as to reduce water absorption and increase heat resistance products, it contains additionally dehydrated clay and dehydrated kaolin in the following ratio of components, May.%: hydrated clay in the following ratio, wt.%: Clay Nepheline syenite concentrate Kaolin Sand quartz Chamotte 24.8-37.0 27.0-28.0 15-24.6 10-13 5-7 Clay Kaolin Cullet Sand quartz Chamotte Nepheline-syenite concentrate Liquid edema Soda ash Dehydrated clay Dehydrated Kaolin 9.2-13.8 22.2- 29.4 4, 4-6.6 24.2- 26.6 14.6-16.4 10.0-15.0 0.1-0.2 0.1-0.2 2.0-3.0 0.8-1.2 components 0.1-0.2 0.2 (in excess of 100%)