Krasnikov K. Mathematical modeling of the molten metal treatment using cored wire and pellet in the ladle during inert gas blowing

The thesis is devoted to actual scientific and practical problem of increasing the productivity and quality of steel on the basis of the calculation results of the mathematical models (which are built in the thesis) of physical processes that take place at the secondary treatment of the molten metal using cored wire and pellet. The mathematical model of the three-dimensional dynamics of the wire was built, which takes wire's bending and torsion into account, and provides a wire's motion path in the body of the molten metal, in particular - points in space, in which the powder from the wire falls into the melt. The problem of melting of the wire and pellet with formation of the crust takes the possibility of asymmetry of the boundary conditions on the metal mirror into account - it allows to evaluate the progress of the two-dimensional melting process in the cross-section of the pellet; the proposed method is applied to calculate the diffusion dissolution of refractory granule. Given the developed models of the dynamics of a wire and asymmetric melting of bodies, software implementation of complex model with a three-dimensional visualization was built. The results of the research are used in the educational disciplines and in finding of rational technological parameters of the treatment of the molten metal in the ladle, which is proved by certificates of usage of research results.