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