Stepanenko D. Development of criterias and methods for the estimation of influence of heterogeneity of fusions of blast-furnace slag on their technological properties

Dissertation is devoted research of heterogeneity of fusions of blast-furnace slag with the purpose of ground of choice of rational composition of slag for the concrete terms of the blast-furnace melting, that determines technological and economic indexes. The followings methods of research are in-process used: statistical analysis, experimental and analytical researches, design and prognostication. A method is offered for the estimation of crystallization of fusions of blast-furnace slag and a criterion is developed for the estimation of heterogeneity of slag fusions, he characterizes the temperature of fusion, energy of activating is minimum higher than which. For fusions of blast-furnace slag of factories of Ukraine new connection of conductivity is set with the index of stekhiometrii of slag taking into account a temperature and a model is offered for its prognostication. First from positions of mineralogical composition it is rotined from data of diagram of the state of the system of "gelenit-okermanit", that it is necessary to take into account the relation of oxides of aluminium and magnesium in composition slag at the choice of their basicity. Models are presented and criteria are developed for the estimation of degree of influence of carbon materials on technological properties of fusions of blast-furnace slag. The method of conduct of the blast-furnace melting (request №a2011 03324 from 21.03.2011) is offered, based on the calculation of normative mineralogical composition of blast-furnace slag taking into account their chemical composition on determination of maintenance of mineral of larnit, which must not exceed 16%. Developed recommendation on optimization of the slag mode of high furnace №9 РJSC "ArcelorMittal Kryvyi Rih". The developed criteria and method of estimation of heterogeneity of fusions of blast-furnace slag are realized on the row of high furnaces of metallurgical industry. It is applied in industry. Metallurgical industry.