Fluoride-free refining slag for 20 Cr structural alloy steel and preparation method thereof
A technology for alloying structural steel and refining slag, applied in the field of steelmaking, can solve the problems of increased equipment maintenance cost, slow melting speed of slag, chronic poisoning of livestock, etc., and achieves significant fluxing effect, light corrosion of furnace lining, and elimination of fluorine pollution.
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[0027] The present invention will be described in further detail below in conjunction with specific embodiments.
[0028] The preparation method of the fluorine-free refining slag of the present invention is: will have CaO, SiO 2 、Al 2 o 3 , MgO and B 2 o 3 Raw materials of ingredients: active lime, calcium aluminate, wollastonite, dolomite and boric anhydride are crushed → batched → formed into refining slag with a particle size of 15-35mm, and the components in the refining slag are as follows by weight percentage: 55~60%CaO, 10~16%SiO 2 , 15~20%Al 2 o 3 , 4~6%MgO, 5~10%B 2 o 3 , TFe≤1%, the balance is impurities, and the particle size of refining slag is 15-35mm. Those skilled in the art can know, when adopting other have CaO, SiO 2 、Al 2 o 3 , MgO and B 2 o 3 During the raw material of composition, as: limestone, quartz stone, bauxite, light burnt dolomite and boric anhydride, can solve technical problem of the present invention equally, reach technical effec...
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