RU2619569C1 - Method for glassing ceramic facing tile - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method comprises loading the powder into the powder feeder, melting the powder in a plasma torch, coating the melt on the front surface of the product. Preliminarily, the plasma-generating gas argon is introduced into the powder feeder, and then argon together with the glaze powder is fed into the plasma torch. Coating the melt on the front surface of the product is performed at the plasmatron power output of 12 kW and at the glaze powder consumption of 1.25-1.50 g/min.

EFFECT: increasing frost resistance, reducing stresses in the coating.

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Description

The invention relates to the ceramic industry, and in particular to the field of ceramic tiles, and can be used in the building materials industry.

The prior art knows a similar way of glazing ceramic products (Augustinik A.I. Ceramics. - M .: Stroyizdat, 1957. - 484 p.), Including technological operations for the preparation of the glaze slip, its application to the front surface of the product and firing in slot or tunnel stoves.

The disadvantage of the analogue is the high energy intensity of the glazing process, as well as the complexity of the hardware design.

Closest to the proposed method in terms of technical nature and the achieved result is a method for glazing ceramic products (RF Patent No. 2335483), including loading powder into a powder feeder, feeding powder to a plasma torch cut, melting the powder in a plasma torch, and spraying the melt onto the front surface of the product when plasmatron power of 15 kW and at a flow rate of glaze powder of 2.75-3.00 g / min.

A significant disadvantage of the prototype is the high energy intensity of the process of glazing ceramic products.

The technical result of the invention is to reduce the energy intensity of the process of glazing ceramic tiles.

The technical result is achieved by the fact that the proposed method for glazing ceramic tiles includes loading the powder into a powder feeder, melting the powder in a plasma torch, spraying the melt on the front surface of the product, in addition, plasma-forming gas (argon) is introduced into the powder feeder, after which argon is combined with a glaze powder is fed into a plasma torch, and the melt is sprayed on the front surface of the product with a plasma torch operating power of 12 kW and with a glaze powder consumption Zuri 1.25-1.50 g / min.

The proposed method for glazing ceramic tiles differs from the prototype in that in the proposed method, plasma-forming gas (argon) is first introduced into the powder feeder, after which argon is fed into the plasma torch together with the glaze powder, and the melt is sprayed on the front surface of the product with the plasma torch operating power 12 kW and at a flow rate of glaze powder 1.25-1.50 g / min.

The analysis of the known methods for plasma glazing of ceramic products allows us to conclude that the proposed method meets the criterion of "novelty."

An example of glazing ceramic tiles with blue cobalt glass powder.

For glazing, unglazed ceramic tiles with a size of 250 × 250 × 8 mm were used. The tile was laid on a plate conveyor, the speed of which is 0.25 m / s. A plasma torch GN-5r of an electric arc plasma torch UPU-8m was installed above the plate conveyor. Plasma-forming gas (argon) was supplied to the plasma torch through a powder feeder, in which there was cobalt blue glass powder. For melting, a powder with a plasma-forming gas was fed into a plasma torch. From a plasma torch, molten particles were sprayed onto the front surface of the ceramic tile under the influence of a plasma-forming gas stream leaving the plasma torch. Spraying was carried out with a plasma torch operating power of 12 kW and a plasma-forming gas (argon) flow rate of 2.5 m ³ / h at a plasma torch passing through the ceramic surface of 0.25 m / s.

After glazing, the frost resistance of the product was determined by the method of alternate freezing-thawing and the porosity of the glaze coating - using the "Spot" method.

The optimal glazing parameters of ceramic tiles in the proposed method are determined experimentally and are presented in table 1.

The effect of the consumption of glaze powder on the state of glazing at the optimum plasma torch operating mode is presented in table 2.

A comparative analysis of technological operations and quality indicators of the known and proposed methods are presented in table 3.

As can be seen from tables 1-3, the optimal glazing parameters of ceramic tiles are observed when the power of the plasma torch is 12 kW and when the flow rate of the glaze powder is 1.25-1.50 g / s.

Claims (1)

The method of glazing ceramic tiles, comprising loading the powder into a powder feeder, melting the powder in a plasma torch, spraying the melt onto the front surface of the product, characterized in that the plasma-forming gas, argon, is first introduced into the powder feeder, after which argon is fed into the plasma with the glaze powder burner, and the melt is sprayed on the front surface of the product with a plasma torch power of 12 kW and a glaze powder flow rate of 1.25-1.50 g / min.