wustite and a ferrite

Although I thought that it was big bloom, when it was re-heated and having been beaten , it was broken in pieces. When it looks at  microscope, wustite and a ferrite can be seen. Because the temperature of slag is low, didn't iron condense? I feel that the composition  is not bloom....And I think that it was broken, when beaten ,since iron was not condensed.  What is required in order to condense iron?  High temperature, the amount of ventilation .....?

 

ノロの顕微鏡写真

bloom....?

The lump of furnace bottom was immediately taken out and beaten after smelting from 800-gram ore. Although I thought that it was big bloom, while it was beaten, it became small rapidly.