Foaming in Electric Arc Furnace : Part I: Laboratory Studies of Enthalpy changes of Carbonate Additions to Slag Melts

• In the present work, a modified thermal analysis technique was used for studying the heat effect of slag foaming with carbonates addition. Experiments were conducted by sinking limestone and dolomite pieces of defined shapes (together with iron sinkers) in molten slag and monitoring the temperature changes accompanying the decomposition of carbonates. The heat effects of dolomite and limestone decompositions were determined at 1623 K (1350 A degrees C) and 1673 K (1400 A degrees C). It was found that the decomposition energy for dolomite and limestone for the studied slag composition is in the range of 56 to 79 pct of theoretical values, which is linked to the energy-saving effect of slag foaming. No influence of sample shape on decomposition energy was found for both limestone and dolomite.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)

Nyckelord

Decomposition energy

Electric arc furnace

Energy-saving effect

Enthalpy change

Heat effect

Laboratory studies

Molten Slag

Sample shape

Slag compositions

Slag foaming

Slag melt

Temperature changes

Theoretical values

Thermal analysis techniques

Carbonates

Decomposition

Electric arcs

Furnaces

Limestone

Thermoanalysis

Metallurgical process engineering

Metallurgisk processteknik

Publikations- och innehållstyp

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art (ämneskategori)