Sometimes some other activities are done like scrap is also put along with the hot metal Scrap charging-Scrap is the metal scrap. Along with the hot metal, the scrap is also poured inside the shell by HM pouring. There is a scrap bucket, which is a big bucket which is filled with scrap, and is opened from bottom section and is poured into the shell from above directly. Top Removal -the top part of the shell is the roof of the shell, during the scrap charging the whole roof is removed and goes backward, and the scrap goes inside the shell. If this activity starts immediately after leveling, then the start time is the end of levelling time and then the top roof is put back is the end time. Top roof Removal is not considered as a separate activity but as a part of scrap charging.