Vorozhbiyan R. Aluminous cement on the base of nickel-containing wastes of chemical industry

Object of the research - phase formation processes in an aluminous cement clinker on the base of nickel-containing wastes in the CaO - NiO - Al2O3 system. Aim of the dissertation is development of aluminous cements with the use of the wastes of chemical enterprises on the base of the compositions in the CaO - NiO - Al2O3 system with high performance characteristics. Research methods and equipment: thermodynamics studies, X-ray diffraction analysis, differential-thermal analysis, electron microscopy, petrographic research, and statistical method of experiment planning with the use of computer. Physical and mechanical properties of the developed materials have been determined in accordance to DSTU. Theoretical and practical results: Based on the stated scientific statements and obtained experimental data, effective refractory binding materials with a complex of preset performance characteristics have been developed on the base of compositions of ternary oxide system CaO - NiO - Al2O3 with the use of water treatment wastes as well as spent catalysts of PrJSC "Severodonetsk Azot Association" as initial raw materials; Technical specifications and technical rules for production of industrial-research batch of aluminous cement have been developed. Technical novelty of developed materials is confirmed by Ukrainian patent on utility model. Novelty: physico-chemical and kinetic patterns of the microstructure formation of high-strength aluminous cements on the base of the ternary system CaO - NiO - Al2O3, which provides the complex of preset characteristics have been established according to the results of thermodynamic calculations. Implementation extent: the materials are implemented at OOO "Spetskeramika" (Severodonetsk), and the scientific results are implemented into academic process of NTU "KhPI". Scope of use: the work results can be used for solving new problems and prospective directions of development of refractory binding materials, refractory and high-temperature concretes on enterprises manufacturing cast-in-situ linings of complex configurations with high mechanical and technical properties, and also can be used in higher education institutions for training professionals in the field of technology of refractory non-metallic and silicate materials.