RU2335478C2 - Faience mass - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention can be applied in production of utensils and artistic articles, finishing building ceramics. Faience mass includes clay, kaolin, quartz sand, broken faience crockery, sodium tripolyphosphate as electrolyte, cobalt sulfate, and broken glass in the following component ratio, wt %: clay - 28.0-32.0; kaolin - 28.0-32.0; quartz sand - 8.0-10.0; broken faience crockery - 8.0-10.0; electrolytes - 0.15-0.25; cobalt sulfate - 0.05-0.15; broken glass - 19.7-21.7.

EFFECT: lower baking temperature.

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Description

The invention relates to the field of technology of silicates and relates to compositions of earthenware masses, which can be used for the manufacture of household and decorative items, decorative building ceramics.

Known faience mass of the following composition, wt.%: Clay 29,0; kaolin 27.0; silica sand 28.0; faience skull 16.0; electrolytes 0.15-0.2; cobalt sulfate 0.03 [1].

The objective of the invention is to reduce the firing temperature of products obtained from the mass.

The technical result is achieved in that the earthenware mass containing clay, kaolin, quartz sand, earthenware skull, electrolyte, cobalt sulfate, contains sodium tripolyphosphate as an electrolyte and additionally includes cullet, in the following ratio, wt.%: Clay 28.0- 32.0; kaolin 28.0-32.0; silica sand 8.0-10.0; faience skull 8.0-10.0; electrolytes 0.15-0.25; cobalt sulfate 0.05-0.15; cullet 19.7-21.7.

The table shows the composition of the mass.

Table Components Composition, wt.%: one 2 3 clay 28 thirty 32 kaolin 32 thirty 28 quartz sand 10 9 8 faience skull 8 10 12 electrolyte - sodium tripolyphosphate 0.25 0.2 0.15 cobalt sulfate 0.05 0.1 0.15 cullet - window glass, glass containers 21.7 20.7 19.7 firing temperature, ° С 1000-1050 1000-1050 1000-1050

In the composition of the porcelain mass can be used clay, including, wt.%: SiO ₂ 51,08-55,88; Al ₂ O ₃ 30.00-33.63; TiO ₂ 1.04-1.10; Fe ₂ O ₃ 0.59-0.72; CaO 0.48-0.62; MgO 0.84-0.93; Na ₂ O 0.40-1.58; K ₂ O 0.36-2.04; p.p.p. 7.00-7.99.

Can be used kaolins of the following composition, wt.%: SiO ₂ 13.86-35.55; Al ₂ O ₃ 47.49-78.50; TiO ₂ 0.25-1.20; Fe ₂ O ₃ 0.35-2.50; CaO 0.13-0.71; MgO 0.18-0.90; Na ₂ O + K ₂ O 0.18-1.60; p.p.p. 6.00-12.87.

As cullet use the fight of colorless silicate glass (window sheet, container, etc.).

The components are dosed in the required amounts. The faience skull, quartz sand, cullet, sodium tripolyphosphate are loaded into a ball mill, water is poured and components are ground for 6-8 hours to a residue of 3-4% on a 0056 sieve. Then clay, kaolin, cobalt sulfate are added to the mill and ground within 2-3 hours. The degree of grinding of the finished slurry should correspond to the remainder of 1.5-2% on a sieve 0056, the moisture content of the slurry take 36-38%. Using the obtained slip in gypsum molds, articles of the desired configuration are cast. Cast products wither in molds to a moisture content of 18-21%, at which the castings freely separate from the walls of the molds. Then the products are dried to a moisture content of 1-3%, a layer of glaze is sprayed on their surface and sent for firing, which is carried out at a temperature of 1000-1050 ° C.

Information sources

1. Poluboyarinov D.N., Balkevich V.L. Handbook for the production of building ceramics. Finishing and special building ceramics. - M .: State. Publishing house of literature on construction, architecture and building materials. - T.2, 1961. - P.122.

Claims (1)

Earthenware mass containing clay, kaolin, quartz sand, earthenware skull, electrolyte, cobalt sulfate, characterized in that it contains sodium tripolyphosphate as an electrolyte and additionally includes cullet in the following ratio of components, wt.%: Clay - 28.0-32, 0; kaolin - 28.0-32.0; silica sand - 8.0-10.0; faience skull - 8.0-10.0; sodium tripolyphosphate - 0.15-0.25; cobalt sulfate - 0.05-0.15; cullet - 19.7-21.7.