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ＲＨ－ＰＢ（ＲＨ顶部喷粉）法是通过安装在ＲＨ中的顶部水冷喷枪，将粉状材料喷入到钢液中的一种新的精炼法。用这种方法，可以实现下列新的精炼功能：（１）喷吹ＣａＯ基助熔剂进行脱硫；（２）当钢中的碳＜２０ｐｐｍ时，向钢液内喷吹Ｆｅ２Ｏ３进行加速脱碳。
The RH-PB (RH Top Dusting) method is a new refining method for injecting powdered material into molten steel through a top water-cooled spray gun mounted in the RH. In this way, the following new refining functions can be achieved: (1) CaO-based fluxing is injected for desulfurization; (2) when carbon in the steel is <20 ppm, Fe2O3 is injected into the molten steel for accelerated decarburization.