The invention discloses an RH vacuum
calcification furnace process treatment method. The RH vacuum
calcification furnace process treatment method comprises the following steps of KR molten iron pretreatment, converter
smelting, RH vacuum refining and slab
continuous casting, wherein the RH vacuum refining comprises
decarburization, deoxidation alloying and
calcium treatment; in the decarburizationprocess, a
slag surface deoxidizing agent is added to the surface of furnace
slag in the middle and later periods of the
decarburization, the adding amount is 1.0-2.0 kg per
ton of steel, and the
ladle slag is modified to enable the content of (T.Fe + MnO) in the slag to be less than or equal to 5 wt%; in the deoxidation alloying process, an
alloy and carbon
powder are added for the deoxidation alloying; in the
calcium treatment process, a seamless pure
calcium wire is started to be fed for calcium treatment 5 minutes after the deoxidation alloying is finished, and the pressure of a
vacuum chamber is increased to 200 mbar or above during the calcium treatment; and after the calcium treatment is finished, the pressure of the
vacuum chamber is reduced to 2 mbar or below, static circulationis conducted for 6 minutes, and then vacuum breaking tapping is conducted. According to the process method, the seamless calcium wire is fed after the deoxidation alloying, and meanwhile, the
Ca element is uniformly distributed in
molten steel by utilizing RH
molten steel circular stirring, so that the modification of Al2O3 inclusion is realized, the
Ca element oxidation amount is low, the calciumyield is increased, and the calcium
treatment effect is stabilized.