The object of this research was a self-resonated inverter, based on paralleled Insulated-Gate Bipolar Transistors (IGBTs), for high-frequency induction heating equipment, operating in wide range output powers, applicable and industrial purposes. For the nominal installed capacity these types invertors to be improved, presented inverter with modified circuit comprising IGBT transistors connected...

In case of the currents asymmetry analysis for an induction furnace – symmetrizing circuit connected in a Steinmetz scheme, one of the most important aspects is represented by the negative asymmetry coefficient. This one can be determined knowing the positive sequence and the negative sequence components and the initial parameters R0 and X0 of the induction furnace. The testing algorithm follow...

a r t i c l e i n f o Batch melting takes place within the cold cap, i.e., a batch layer floating on the surface of molten glass in a glass-melting furnace. The conversion of batch to glass consists of various chemical reactions, phase transitions , and diffusion-controlled processes. This study introduces a one-dimensional (1D) mathematical model of the cold cap that describes the batch-to-gla...

In order to achieve energy and climate goals, resource efficiency are considered a key measure. Limit-value-oriented methods such as the exergy analysis physical optimum method used show limits of improvement. this context, represents theoretical ideal reference process. Despite their similarities, no comprehensive comparison has been carried out yet. Thus, purpose study is close gap by examini...

steel slags are the by products of steel industries, which forms during reduction process of iron melting. the chemical composition of it changes depending to the melting procedure. its mineralogical composition also varies based on the cooling procedure. two different types of steel slag were used as absorbing bed for various concentrations of pb2+ ions in the form of lead chloride, and the co...

This paper outlines the application of a knowledge-based expert system to assist the furnace production staff in diagnosing and correcting Electron Beam (EB) guns, which are used to melt titanium. The characteristics of a titanium melting facility, its business objectives, and the responsibilities of its furnace operators are reviewed. Alternative solutions to the problem of accurately troubles...

Abstract Niobium doped biosolubility glasses in the Na–Ca–(Mg)–P–Si–O system were prepared by using an untypical two-step synthesis route. The parent glass was melted air atmosphere at 1350 °C followed re-melting Nb crucible with addition of metallic Mg/Ca powder nitrogen atmosphere. second melting step carried out 1450–1650 °C, induction furnace. topography and structure obtained characterized...

In view of the economy and environmental impacts of the energy utilization, most of the heat transfer industries such as steel mills, glass plants and forging shops, foundry process and furnaces are focusing on energy efficient strategies and implementing new technologies. Gas Technology Institute (GTI) and Air Liquide Chicago Research Centre (ALCRC) have applied Oscillating Combustion Technolo...

Legislation arising from health and environmental concerns has intensified research into finding suitable alternatives to lead-based piezoceramics. Recently, solid solutions based on sodium potassium niobate (K,Na)NbO3 (KNN) have become one of the globally-important lead-free counterparts, due to their favourable dielectric and piezoelectric properties. This data article provides information on...