VOL 81, No. 3 (2008)

Considered are cardinal changes in the design of flat glass bath furnaces, contributing to a significant improvement in technical and economic indicators. The most effective technical solutions are changes in the designs of the loading pocket, burners, regenerators and clamping and their equipping with modern technological equipment and highly resistant refractories. Il. 3.

A comprehensive analysis of the known hypotheses of the structure of alkali-borate glasses has been carried out. Their imperfection is noted when explaining the dependences of the properties of glasses on their composition. Alternative schemes of structural borate complexes are proposed, which more convincingly make it possible to explain the regularities of changes in the properties of these glasses. Il. 8, bibliography: 9 titles.

The processes of aggregation during the production of oxide powders and their compounds by chemical methods used for the manufacture of functional ceramics are considered. It is shown that the aggregation of powder particles prevents the production of high-density ceramics. Technological methods and conditions for the manufacture of products of high relative density have been established. Tab. 1, ill. 2, bibliography: 7 titles.

When clayey rocks are heated, the decomposition of organic matter is accompanied by the release of Н ₂, СО and СО ₂, which create a reducing nature of the gaseous environment. Burnout of residual carbon occurs in the temperature range 250 - 500 ° C and is extreme due to oxygen diffusion into the inner layers of the heat-treated material. To exclude the black core, it is recommended to provide exposure in the temperature range of 700 - 800 ° C to complete the oxygen burnout process, as well as to mold hollow products with the minimum permissible thickness of the outer and inner walls. Tab. 2, ill. 2, bibliography: 6 titles.

Multilayer aluminosilicate materials used for drinking water purification have been investigated. The main results of experimental studies obtained during the development of technological modes for the manufacture of aluminosilicate filter elements are presented. Tab. 2, ill. 3, bibliography: 4 titles.

The phase transformations occurring during the firing of clay from the Buskul deposit, granodiorite from the Seversky deposit and felsite from the Pokrovsky deposit, and mixtures of clay with granodiorite and felsite in different ratios have been investigated. By the method of quantitative X-ray phase analysis, the change in the content of crystalline phases (cristobalite, mullite and quartz) in the starting materials and mixtures during the firing process was established. Tab. 5, ill. 3, bibliography: 2 titles.

On the basis of aluminosilicate ceramic concrete, a lining for trolleys used in ceramic kilns has been developed and introduced. The first trolleys with such a lining have already passed over 50 cycles. Tab. 1, ill. 1, bibliography: 8 titles.

A mathematical model is considered, with the help of which technological parameters are maintained in real time, depending on the amount of bricks produced. Il. 2.

An environmentally friendly resource-saving technology for producing heat-insulating granular foam glass with closed pores has been developed. Thermal characteristics of the obtained granulated glass-ceramic foam make it possible to recommend it as an effective heat-insulating material for high-temperature heating units and utility networks. Il. 5, bibliography: 4 titles.

It has been shown that the use of AC32 - AC50 diamond powders (instead of AC6 - AC15 powders) in combination with a new metal bond with hardness HB 75 - 85 (compared to the M2-01 bond) makes it possible to extend the service life of wheels by 1.5 - 2 times. products from high-quality and art glass, as well as to reduce the specific consumption of diamonds and increase the cutting ability of the tool. Il. 2, bibliography: 4 titles.