A study was made on the mechanism of dust generation by the investigation of dust behavior in top and bottom blowing converter. The results are summarized as follows:
(1) Dust in converter is formed by the condensation of fume on the surface of bubble bursting particle.
(2) Weight ratio of bubble bursting particle included in total weight of dust is larger in early stage of blowing and decreases with blowing time. Therefore it is considered to be effective for decreasing dust weight to form slag as early as possible in the blowing period and to decrease the temperature of hot spot area by oxygen jet in the middle and final stage of blowing.
