SU151444A1 - METHOD OF OBTAINING GLASS-CRYSTALLINE PRODUCTS - Google Patents

Description

Methods are known for the preparation of glass-ceramic articles by means of a two-stage heat treatment after molding them from glass.

However, these methods are based on the use of high-quality raw materials for the production of glass, with some of the catalytic materials used as additives being precious metals.

The proposed method involves the manufacture of small-sized glass products, obtained on the basis of waste solidified or fiery-liquid nllakov. Molded by known methods of the product without prior annealing is subjected to heat treatment according to the following mode:

temperature rise at a rate of 250 ° C per hour up to 700-720 ° C;

the rise of temperature at a rate of 50 ° С per hour up to 820-900 ° С;

exposure for one hour at 720-980 ° C;

temperature rise with a speed of 50 ° С per hour up to 950-1060 ° С and holding at these temperatures for 60 minutes.

For the manufacture of glass-ceramic small-sized products, cooled slags, nonmetallic minerals or rock rocks or their mixtures can be used by melting them with catalytic additives, which can be used as: chloride

sodium, carnalites, sulphates, sulphides, iron metal powders, appatites, superphosphates, etc.

After molding or casting of small-sized products by known methods, they are crystallized by heat treatment without prior annealing.

Processing mode

Temperature rise at a rate of 250 ° C per hour up to 700-720 ° C;

temperature rise at a rate of 50 ° С B hour up to 820-900 ° С;

exposure for one hour at 720-980 ° C;

temperature rise at a rate of 50 ° C per hour up to 950-1060 ° C and holding at these temperatures for 60 lx.

The same method can be used to obtain products from fiery liquid slags placed in

pools, high-temperature thermostats with built-in devices for dissolving necessary additives and catalysts in hot slag; this process uses the above-mentioned slags.

The proposed method makes it possible to obtain finished products not only by casting or molding, but also by rolling, pressing, etc. P.

superior not only the strength of glass, but also the strength of carbon steel. They are very resistant to aggressive environments, wear-resistant, have high heat resistance and good dielectric properties. With all these qualities, these products are lighter than aluminum products.

Subject invention

The method of obtaining glass-ceramic products by two-stage heat treatment on molding them from glass, characterized in that, in order to obtain small-sized glass products based on waste solidified or fiery liquid slags, the products are heat-treated in the following mode without prior annealing; :

temperature rise at a rate of 250 ° C per hour up to 700-720 ° C;

temperature rise at a rate of 50 ° C per hour up to 820-900 ° C;

exposure for 60 min at 720-980 ° C;

temperature rise at a rate of 50 ° C per hour up to 950-1060 ° C;

holding at these temperatures for 60 min.