Siberian Federal University, Krasnoyarsk, Russia:

Nikiforova E. M., Senior Researcher, Candidate of Engineering Sciences, Associate Professor, nem1950@inbox.ru
Eromasov R. G., Associate Professor, Candidate of Engineering Sciences, kmp198@inbox.ru
Vasilyevа M. N., Associate Professor, Candidate of Chemical Sciences, Associate Professor, fiz-chim@mail.ru

One of the directions for the Sorsky Mining Complex molybdenum ores flotation tailings utilization in structural ceramics production is presented. The significant effect of the tailings upon cellular thermal-insulating-structural ceramics structure and properties control is established. Production of cellular ceramics with porous structure is related to solving the problems of obtaining high-strength matrix (walls between pores), and provision of microstructure with regularly spaced distribution of fine isolated pores. The work describes the cellular ceramics production method by means of aeration. A foamproducing agent PB-2000 from synthetic surfactant of anion-active
type was applied. High-strength walls in matrix structure are created through liquid-phase sintering owing to melting of low-temperature components of molybdenum ores flotation quartz-feldspar tailings — albite and orthoclase, as well as by formation of crystalline phases in matrix walls, providing improved physical and mechanical characteristics. The methods for foamed system stabilization through introduction of gypsum binder G-16 were studied. The experiments proved that retention of produced foam and its stabilization are provided with gypsum mass fraction of at least 15 %. Sodium silicate was used as network-forming constituent and also for fluidization of clay suspension. Cellular thermal-insulating-structural ceramics materials with density of 900 kg/m³, with ultimate compression strength of 5 MPa and thermal conductivity coefficient of 0.25 W/m·°С were produced. Cellular ceramics production flow sheet utilizing the Sorsky Mining Complex molybdenum ores beneficiation tailings has been developed.

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