RU2281265C2 - Ceramic mass for preparing acid-resistant materials - Google Patents

Abstract

FIELD: industry of ceramic materials.

SUBSTANCE: invention relates to mass compositions used in preparing acid-resistant materials. Method involves addition of water glass to ceramic mass comprising clay part of gravitation "tails" of zircon-ilmenite ores and pyrophyllite in the following ratio of components, wt.-%: clay part of gravitation "tails" of zircon-ilmenite ores, 20-40; pyrophyllite, 55-65, and water glass, 5-15. Invention provides enhancing resistance to cold and thermal stability of ceramic mass.

EFFECT: improved and valuable properties of ceramic mass.

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Description

The invention relates to the industry of ceramic materials, mainly to compositions of the masses to obtain acidproof.

A ceramic mass is known for producing acid-resistant materials of the following composition, wt.%: Zhanadaur clay - 50, pyrophyllite 50 / Abdrakhimova E.S. Kinetics of changes in the structure of porosity in the process of acid-resistant firing / E.S. Abdrakhimova, V.Z. Abdrakhimov. // News of universities. Construction. - 2000. - No. 9. - C 38-41 / [1].

The disadvantage of this composition is the relatively low frost resistance and the content in the charge of scarce expensive Zhanadaur refractory clay.

Closest to the invention is a ceramic mass for the manufacture of acid-resistant, including the following components, wt.%: The clay part of the "tails" of gravity of zircon-ilmenite ores - 50, pyrophyllite - 40, feldspar concentrate - 10 / Abdrakhimova ES Obtaining acid-resistant materials using industrial wastes / E.S. Abdrakhimova, V.Z. Abdrakhimov. // Building materials. - 2002. - No. 2. - S. 18-20 /] [2]. Adopted for the prototype.

The disadvantage of this composition of the ceramic mass is low frost and heat resistance.

The aim of the invention is to increase the frost resistance and heat resistance of the ceramic mass.

This goal is achieved by the fact that the well-known ceramic mass, including the clay part of the "tails" of gravity of zirconilmenite ores and pyrophyllite, additionally contains liquid glass in the following ratio of components, wt.%:

The clay part of the “tails” of gravity zircon-ilmenite ores 20-40 Pyrophyllitis 55-65 Liquid glass 5-15

Putting liquid glass as a binder into the ceramic masses will increase the pyrophyllite content up to 65%, which contributes to the formation of mullite during firing. Mullite increases the frost and heat resistance of acid-resistant materials. In addition, liquid glass acts as a flux, which reduces the firing temperature.

Sodium liquid glass Na ₂ O · mSiO _{2 was} used as a flux and binder. The module of water glass m = 2,3-3 with a density of 1.3-1.5 g / cm ³ . This glass was obtained from quartz sand and soda in glass melting furnaces. The chemical compositions of the clay part of the “tails” of gravity of zircon-ilmenite ores and pyrophyllite are given in Table 1.

Table 1.
The chemical composition of the components Component The content of oxides,% SiO ₂ Al ₂ About ₃ Cao MgO Fe ₂ O ₃ R ₂ O P.p.p. The clay part of the “tails” of gravity (GCI) 58.74 21.39 1,760 1.22 6.21 1.82 7.34 Pyrophyllitis 52.85 34.88 0.22 0.1 0.4 0.09 7.88

The ceramic mass was prepared in a plastic way at a moisture content of 18-22%. Square tiles of type PK-1 were formed, which were dried to a residual moisture content of not more than 5% and then fired at a temperature of 1250 ° C. Table 2 shows the composition of ceramic masses, and in table 3 - physical and mechanical properties of acid-resistant tiles.

Table 2.
The compositions of ceramic masses Components The content of components, wt.% one 2 3 four 5 The clay part of the “tails” of gravity of zircon-ilmenite ores 40 35 thirty 25 twenty Pyrophyllitis 55 58 60 63 65 Liquid glass 5 7 10 12 fifteen

Table 3.
Physicomechanical indicators of acid resistance Indicators Compositions Prototype one 2 3 four 5 Frost resistance cycles 215 223 234 248 254 More than 50 Water absorption,% 1.8 2,3 2,5 2,8 3.2 2.0 Acid resistance,% 97.4 97.7 97.9 98.1 98.3 97.5 Heat resistance, heat exchange 8 9 eleven 12 fourteen 7

As can be seen from table 3, acid-resistant tiles from the proposed compositions have higher frost resistance and heat resistance.

The resulting technical solution will allow on the basis of production wastes to obtain heat-resistant and frost-resistant acid-resistant. The use of industrial waste in the production of ceramic acid-resistant materials contributes to their disposal, environmental protection and the expansion of the raw material base for building ceramic acid-resistant materials.

Information sources

1. Abdrahimova E.S. Kinetics of changes in the structure of porosity in the process of firing acid-resistant / E.S. Abdrahimova, V.Z. Abdrakhimov .// News of universities. Construction. - 2000. - No. 9. - S. 38-41.

2. Abdrahimova E.S. Obtaining acid-resistant materials using industrial wastes / E.S. Abdrakhimova, V.Z. Abdrakhimov .// Building materials. - 2002. - No. 2 - S.18-20.

Claims (1)

Ceramic mass for producing acid-resistant materials, including the clay part of the “tails” of gravity of zircon-ilmenite ores and pyrophyllite, characterized in that it additionally contains liquid glass in the following ratio of components, wt.%: The clay part of the “tails” of gravity zircon-ilmenite ores 20-40 Pyrophyllitis 55-65 Liquid glass 5-15