Abstract
Combined with converter semi-steel component of Chengde steel plant, the main components of 100t ladle dephosphorization slag were calculated to propose the initial ratio of dephosphorization slag composition. The dephosphorization slag composition was then further improved by induction furnace dephosphorization. Analysis of dephosphorization rules has been done. The results show that: the dephosphorization effect reaches the best when the percent content of CaO is 35%, the amount of slag is 20kg/t, oxygen flow rate is 4L/min, oxygen blowing time is 4min, and dephosphorization efficiency can reach 56.9%; the order of the elements influencing dephosphorization rate is as follows: oxygen flow rate > slag > CaO > oxygen blowing time. From the experiment, dephosphorization in the ladle can reach the expected effect, which is the new method of hot metal pre-dephosphorization for iron and steel plant using vanadium titanium magnetite.
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