CaO-FeO-SiO2-MnO Slag

Name: CaO-FeO-SiO2-MnO
Diagram No.: 1126
Type of diagram: TTT
Chemical composition in weight %: See the table
Group: Slags
Note: TTT diagram for the quaternary CaO-FeO-SiO2-MnO system, B- basicity (B=CaO/SiO2), samples No. 9-11.
The time until observable crystal precipitation took place was measured through in-situ visualization from CSLM video recording at various temperatures. A corresponding TTT diagram with average data was then constructed as shown in Figure. A single TTT nose was found and the precipitated particles at the gas/liquid interface were found to grow and agglomerate. Different types of crystals were observed in a size range of 1-50 µm. For the Mn-containing slags below 1473 K, crystals had a shape similar to that presented in Figure, whereas above 1473 K, crystals had complicated geometry. At higher temperatures, crystals were larger in comparison to those found at lower temperatures. With time, the crystals grew and agglomerated.
Reference: Not shown in this demo version.

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