Levadna S. Cobalt-containing alumina cement based on waste from the chemical industry

The object of research - the processes of clinker phase formation of alumina cement based on cobalt-containing waste in the system CaO-CoO-Al2O3-MoO3. The aim of the dissertation is to develop compositions of aluminous cements with high performance using waste from the chemical industry based on the compositions of the four-component oxide system CaO-CoO-Al2O3-MoO3. Research methods and equipment: thermodynamic, X-ray phase, differential thermal, electron microscopic, petrographic and statistical methods of experiment planning using Office Excel and Triangle 1.0 software packages. Physico-mechanical and technical properties of the developed materials were determined in accordance with DSTU. Theoretical and practical results: on the basis of the formulated scientific positions and the received experimental data effective refractory binders with a complex of the set operational characteristics on the basis of compositions of four-component oxide system CaO-CoO-Al2O3-MoO3 with use as starting raw materials of wastewater treatment PJSC "Severodonetsk Association of Nitrogen". Novelty: according to the results of thermodynamic forecasts, physicochemical and kinetic regularities of formation of microstructure of high-strength alumina cements on the basis of compositions of four-component system CaO-CoO-Al2O3-MoO3 are established, which provides a set of specified operational characteristics. Degree of implementation: industrial tests of developed aluminous cements in LLC SPE "Dominant" and developed concretes in LLC "Service Center" Vognetryvservis "(Dnipro), and scientific results of work in the educational process of NTU" KhPI ". Field of application: the results of work can be used to solve new problems and promising areas of development of refractory binders, heat-resistant and refractory concrete in enterprises in the manufacture of monolithic linings of complex configurations with high physical and mechanical and technical properties, and can be used in higher educational institutions in the training of specialists in the technology of refractory non-metallic and silicate materials.