VOL 78, No. 10 (2005)

The main points of the operation of the automated control system of a glass-making furnace, a working channel, and a feeder are considered. The described system is implemented and fully debugged. Bibliography: 1 titles.

Dependences have been established that characterize redox interactions in the production of amber and brown glasses using sodium sulfate with an excess of a reducing agent or blast-furnace slag in the mixture. All interactions and the resulting coloration are linked to the partial pressure of oxygen. The boundaries of obtaining stable amber glasses have been determined. The reduction potential of the charge, detected by the oxidimetric method, can be expressed in terms of the partial pressure of oxygen and is recommended for determination for colored and colorless glasses. Il. 4, bibliography: 4 titles.

The influence of some additives on the equilibrium of the valence forms of iron is considered. It was shown that tin and carbon reduce iron more strongly than fluorine. The redox potential of the glass matrix affects the equilibrium of the valence forms of iron significantly less than additives that correct the spectral characteristics of the glass. Tab. 4, bibliography: 6 titles.

Methods for determining the indicators of the lower (contacting with the tin melt) and upper (contacting with the gas atmosphere of the bath) surfaces of float glass are considered. Tab. 1, ill. 1, bibliography: 3 titles.

The analysis of the productivity of sectional glass-forming machines showed the presence of technological reserves in the domestic glass container production. The advantages of high-calcium compositions have been established by comparative analysis of physicochemical, technological and performance properties of alternative compositions of colorless container glass. The ways of their implementation in the technological process, contributing to an increase in the efficiency of the production of glass containers, are proposed. Tab. 2, ill. 2, bibliography: 6 titles.

The issues of expanding the range and increasing the volume of production of ceramic wall materials are considered. The physicochemical and technological properties of zeolite-containing clay raw materials have been studied. It is shown that with certain methods of prescription and technological nature, it is possible to produce ceramic wall materials that meet modern construction requirements in terms of strength, frost resistance, and colors. It is noted that the available reserves of zeolite-containing clay raw materials make it possible to significantly expand the raw material base for the production of coarse ceramics. Tab. 2, ill. 2, bibliography: 3 titles.

The possibility of making majolica products based on local raw materials from Tuva is shown. In this case, the heat treatment of the products was carried out at reduced pressure, which significantly intensifies sintering and improves the properties of the materials obtained. Tab. 2, bibliography: 4 titles.

The idea of ??obtaining ceramic composite materials with a high content of metal filler by the method of semi-dry pressing with subsequent drying and firing is proposed. The choice of a ceramic matrix and a metal filler has been substantiated. Bibliography: 2 titles.

The technological and operational reasons for the formation of efflorescence on the surface of the brickwork and the dynamics of their occurrence have been investigated. Preventive measures and possibilities for elimination of salt corrosion of masonry are indicated. Il. 2, bibliography: 5 titles.

The process of evacuation of the mass on vacuum presses and the ways of improving the production of porcelain insulators are considered. The calculation of the specific pressing pressure is given, the distribution of pressure along the length of the press and depending on the moisture content of the mass is shown. Il. 2, bibliography: 3 titles.

Low-melting colored glasses of the ZnB ₂ O ₄ - NaPO ₃ system for decorating glass with a spreading temperature of 550 ° C have been obtained. Their basic physical and chemical properties have been investigated. Experiments were carried out in industrial conditions, which gave positive results when decorating sheet glass by silk-screen printing, followed by firing at temperatures above 550 ° C. Tab. 1, bibliography: 5 titles.

The effect of binders on the quality of paint coatings formed on the basis of lead-free enamels and meeting the requirements of TU RB 100029049.030 has been studied. It has been established that enamel compositions can be prepared using a 20% solution of oxyterpene resin in turpentine and a 2% alcohol solution of Na-CMC grade 7MF. The use of an aqueous solution of dextrin as a binder leads to a deterioration in the quality of enamel coatings - a change in color, a loss of gloss, the appearance of a coke. Il. 2, bibliography: 7 titles.

The influence of additives-nucleators on the surface relief and the degree of crystallization of the material intended for the production of dentin and enamel layers of an artificial tooth is considered. It was found that the addition of hydroxyapatite is optimal for creating the required relief of the soil and dentin layers. Il. 3, bibliography: 4 titles.