Conventionally, DC arc furnaces are fed by thyristor rectifiers to control the level of current or power transferred load. With advancement high-power transistors, other structures such as diode and choppers have been introduced developed for feeding system electric furnaces. In this paper, effect different supply systems on quality indexes is discussed. regard, two types considered, including ...

Electric Arc Furnaces (EAFs), widely used for steel production industries, are highly nonlinear time-variant disturbing loads because of the random change of the electric arc length results in arc voltage and furnace/supply current fluctuations. Consequently, Power Quality (PQ) problems such as undesirable variations of reactive power, poor power factor, harmonics, and voltage flickers may appe...

In this paper a survey of literature dealing with emissions of heavy metals and polyaromatic hydrocarbons during coal combustion is given. The paper is focused not only at big industrial furnaces, but also at problems of small scale furnaces. There is a lot of studies dealing with industrial coal combustion. On the contrary studies dealing with small scale furnaces are substantially less freque...