Abstract
Low-melting polymineral clays are widely used in building ceramics production. The properties of ceramic products depend on many factors. The paper describes properties of low-melting clay from Belebey deposit, Bashkiria. Using mathematical statistics methods, researchers make statistical analysis of grain size composition of clay raw material on Belebey brick factory and also analyze amount of sand additives and mixing moisture content. The study of general and technological properties of clay raw materials, and materials obtained from this raw material, was carried out in accordance with existing regulations using chemical, differential-thermal and non-standard methods. According to chemical analysis, non-standard assessment of clay raw materials was carried out by means of computer program "Assessment", developed at the Department of Building Materials Production and Engineering Structures. The method of calculating quantity and composition of melted material, formed in ceramic masses during firing, using known diagrams of aluminosilicate systems state is used. The assessment made it possible to determine maximum firing temperature and firing range and additives improving clinker formation. The studies show that calculation indicators are consistent with experimental data. They can be used for quick assessment of raw materials properties when changing its composition, and in adjustment of technological parameters of production.
Highlights
A significant amount of ceramic bricks in the Belebey district in Bashkiria is produced at the Belebey brick factory
Assessment of the clay raw materials from Belebey deposit by calculation method allowed to: - determine the maximum firing temperature - 1030°C; - determine the firing interval in the range of 900-1030°C; - establish the type of additive capable of improving clinkering; silica-containing additive is recommended
The properties of clay raw materials from Belebey deposit have been studied by standard methods
Summary
A significant amount of ceramic bricks in the Belebey district in Bashkiria is produced at the Belebey brick factory It was put into operation in 1997 and produces products on the technological line of the German company “Keller”. In spite of modern production, in the output products there are such types of defects as "blisters" and drying cracks [2,3] In addition to these defects, the brick produced has unstable strength characteristics. To develop measures that guarantee the production of ceramic bricks without the defects mentioned, it was necessary to find out their formation reasons. For this purpose, raw materials and production technology have been studied
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