The invention relates to a micro-alloying refining synthetic
slag and a process for preparation, belonging to the steel melting technology field. The invention comprises
raw material in the following parts that 10-20 parts of
vanadium-containing waste, 50-70 parts of
lime, 1-2 parts of
fluorite, 5-15 parts of
silicon carbon and 2-10 parts of
nitrogen absorption agent. The process comprises integrating
vanadium waste,
lime,
fluorite and
silicon carbon into
powder whose grain size is smaller than 0.5mm, then mixing according to proportion, melting with temperature of 600-800 DEG C, adding in
nitrogen absorption agent in the process of premelting, taking out melted
slag which is cooled down to constant temperature, thereby obtaining micro-alloying refining synthetic
slag, and also adding right amount of binding agent to obtain phi 10-20mm ball synthetic slag which is dried with low temperature. Compared with the original synthetic slag, the property of micro-alloying refining synthetic slay of the invention increases over 20% in desulfuration, reduces over 10 minutes in refining time of the refining furnace thereby reaching below 30 minutes, and
smelting consumption reduces 20KWh in one
ton, and the service life of aluminum 1kg
ladle in one
ton steel increases 8-12 times.