Valokaariuunissa

Valokaariuunissa, also known as an electric arc furnace, is a type of industrial furnace that employs an electric arc to melt and refine metals. It is commonly used in the production of steel and other alloys. The process involves passing a high-current electric arc between electrodes and the material to be melted. The intense heat generated by the arc, which can reach temperatures exceeding 3,000 degrees Celsius, effectively melts the charge.

Valokaariuunissa are characterized by their robust construction, designed to withstand the extreme temperatures and mechanical stresses involved. They typically consist of a refractory-lined furnace vessel, electrodes, and a system for controlling the power input and the arc length. The electrodes, usually made of graphite, are lowered into the furnace to initiate the arc. As the material melts, the electrodes are gradually consumed or adjusted to maintain the optimal arc.

The primary advantage of using a valokaariuunissa is its ability to achieve very high temperatures rapidly, allowing for efficient melting and processing of various materials. They are also versatile and can be used to melt scrap metal, virgin materials, or a combination of both. The precise control over temperature and atmosphere within the furnace also enables the production of high-purity alloys and specialized steels with specific chemical compositions. Modern valokaariuunissa are equipped with sophisticated control systems to optimize energy consumption and minimize emissions.