溶銑の脱りん挙動におよぼすインジェクションガスの影響
1985 年 71 巻 9 号 p. 1125-1131
詳細
1985 年 71 巻 9 号 p. 1125-1131
Recently, it is clarified that dephosphorization of hot metal by lime injection with oxygen is more effective than usual dephosphorization with nitrogen. Then the authors made dephosphorization tests by lime injection to compare two kinds of injection gas (N2 and O2), and discussed the dephosphorization reaction on each condition.
As a result, following items were clarified. The rate of dephosphorization by lime injection is mainly dependent on oxygen feeding rate and slagging rate of lime. So the rate of dephosphorization by O2 injection is larger than that by N2 injection.
Therefore, it is desirable to adopt a lime injection with O2 gas to increase the reaction rate and to decrease the consumption of lime.
Then, it becomes a subject of discussion that decarburization is accelerated by O2 injection. However, it is possible by use of mixed gas of N2 and O2 to control the decarbuization rate and dephosphorization rate to a certain extent.
