The diploma work presents the material balance of carbon and the energy balance of the electric arc furnace for two different technologies of the production of 51CrV4 steel.
51CrV4 is a spring steel with a relatively high content of carbon. It has been produced in two different ways that differ in the addition of anthracite to the electric arc furnace. The goal of the diploma was to find out, which of the technologies of production is cheaper and more suitable.
In the theoretical part we describe the process of steel production, from choosing the scrap, to melting and other metallurgical processes that occur in the furnace. Following is the description of carburizers with their physical and chemical properties, along with the theory of mass and energy balance calculations for the electric arc furnace.
The two different technologies of producing 51CrV4 are presented in the experimental part of the diploma: the standard and the test process with a larger addition of anthracite. The results of the chemical analysis of steel are given for samples taken when the scrap has completely melted, before the tapping and after the homogenization in the ladle furnace. The slag samples were taken when the scrap was melted and before tapping. The material and energy balance was made for the standard and test process.
The results of the chemical analysis of steel and the slag along with the material and energy balances are shown graphically and in tables, which clearly shows the differences between the two technologies of producing 51CrV4 steel.
Based on the information from the diploma we can conclude that the new, test process of the production of 51CrV4 steel is neither economically nor energetically efficient.
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