The production of low phosphorus and nitrogen steels in an EAF using HBI

摘要

Commercially-produced hot briquetted iron (HBI) contains considerably more phosphorus than scrap. This raises the question of how much dephosphorization can be achieved when using HBI in an electric arc furnace (EAF), or I oxygen steelmaking, and what the cost of this dephosphorization will be. A commonly held misconception amongst EAF operators who do not currently use HBI, is that the relatively high level of phosphorus in HBI will make dephosphorisation difficult, if not impossible. The experience of EAF operators who do currently use HIB is that dephosphorisation is easily achieved, with no cost penalty, when a conventional flush slag practice is employed. The production of low phosphorus steel from a high phosphorus HBI charge, with no associated cost penalty, has been demonstrated by trials conducted at BHP's Sydney Steel Mill and routine practice at CASIMA in Venezuela and other EAF operators.