RU2341500C1 - Matt black tiled glazing - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: matt-black tiled glazing contains clay, quartz sand, chalk stone, iron oxide, marganese black and granulated phosphoric acid slug. Components are at the following ratio, weight parts: clay 40-50; quartz sand 3-4, chalk stone 2-3; iron oxide 8-10; marganese black 4-6; granulated phosphoric acid slug 29-41.

EFFECT: environmentally safe glazing.

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Description

The invention relates to the building materials industry and relates to glaze compositions for application to ceramic tiles.

Known matte black tiled glaze containing weight.h .: clay 45; silica sand 6.7; chalk 2.5; lead litharge 40; iron oxide 9.7; pyrolusite 7.5 [1]. Such glaze is not environmentally friendly, because it contains a toxic component - lead litharge.

The objective of the invention is to obtain an environmentally friendly matte black tiled glaze.

The technical result of the solution of this problem is achieved by the fact that a matte-black tiled glaze, including clay, quartz sand, chalk, iron oxide, pyrolusite, additionally contains electrothermophosphoric granulated slag in the following ratio of components, parts by weight: clay 40-50; silica sand 3-4; chalk 2-3; iron oxide 8-10; pyrolusitis 4-6; granulated electrothermophosphoric slag 29-41.

Granulated electrothermophosphoric slag is a by-product obtained in the production of phosphorus by sublimation in electric furnaces and rapid cooling. Slag contains 90-95% glass phase and is characterized by the following composition, wt.%: SiO ₂ 40,0-43,0; Al ₂ O ₃ 1.0-3.0; Fe ₂ O ₃ 0.4-1.0; CaO 42.0-49.0; MgO 3.0-4.0; SO ₃ 2.0-3.0; P ₂ O ₅ 0.9-3.0.

Glaze is prepared as follows.

Prepare and dose the components, for example, according to any selected composition, table 1.

Take, for example, 50 kg of clay (used in the manufacture of tiles to be glazed), 4 kg of quartz sand (washed and dried), 3 kg of chalk, 10 kg of iron oxide, 4 kg of pyrolusite, 29 kg of granulated electrothermophosphoric slag. The components are subjected to grinding until they completely pass through the mesh 008. Prepare a glaze suspension with a moisture content of 45-47%. The suspension is applied in the form of a thin layer on the surface of the molded and dried tiles, the products with the applied layer are dried again and fired. The firing temperature (1000-1150 ° C) is selected depending on the technology of tile production and the properties of clay used in the glaze.

Table 1 Tiled Glaze Compositions Components The content in the compositions, wt.%: No. 1 Number 2 Number 3 Clay 40 45 fifty Quartz sand 3 3,5 four a piece of chalk 2 2,5 3 Iron oxide 8 9 10 Pyrolusitis 6 5 four Granulated electrothermophosphoric slag 41 35 29th

During firing, the glaze may not melt into a glassy liquid, but only form a sintered layer that is firmly held on the surface of the tile. Glaze forms a protective and decorative environmentally friendly vitreous coating having a matte black color.

It is possible to use such a glaze for glazing ceramic bricks.

Information sources

1. Gegh G. Pottery / Transl. with him. - L.-M: The main edition of the chemical literature, 1938. - P.177.

Claims (1)

Matte black tiled glaze, including clay, quartz sand, chalk, iron oxide, pyrolusite, characterized in that it further comprises electrothermophosphoric granulated slag in the following ratio of components, parts by weight: clay 40-50; silica sand 3-4, chalk 2-3; iron oxide 8-10; pyrolusitis 4-6; granulated electrothermophosphoric slag 29-41.