**3.6 Experiment no. 6**

Weight of aluminum = 330 g. Amount of CaCo3 = 6 g.

This was the sixth experiment in which the amount of aluminum was 330 g and amount of calcium was 6 g (2% of weight). The stirring time was 60 s. All procedure was the same as described above. The drainage time of the molten metal from the bottom hole was 60 s. The microstructure was shown in **Figure 20**.
