Mechanism Study of the Blocking of Ladle Well Due to Sintering of Filler Sand

• The present work is aimed at a mechanism study of blocking of ladle well by filler sand. Laboratory experiments are carried out using two different chromite-based filler sands. The interaction between the liquid steel and the sand is also studied by using steels containing different contents of Mn and Al. The reaction between the silica phase and the chromite phase is found to be the main mechanism for the sintering of sand. The reaction results in a liquid oxide phase, which becomes the binding phase between the solid oxide grains. The amount of silica phase and its grain size are found to have great impact on the formation of the liquid oxide phase. Faster formation of the liquid oxide phase leads to more serious sintering of the sand. It is found that liquid steel can hardly infiltrate into sand. On the other hand, the presence of steel considerably increases the amount of liquid phase and enhances the sintering of the sand.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

Nyckelord

Filler sand

Ladle free opening

Liquid steel

Sintering

Chromite

Chromite deposits

Fillers

Ladles

Liquids

Manganese

Sand

Silica

Binding phase

Chromite phase

Laboratory experiments

Liquid oxides

Liquid Phase

Liquid steels

Mechanism studies

Solid oxide

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