Vanadium-titanium nodular cast iron smelting method
A technology of nodular cast iron and vanadium-titanium, which is applied in the field of smelting vanadium-titanium nodular cast iron, can solve problems such as increasing whitening tendency, and achieve the effects of low cost, reduced production cost, and convenient operation
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Embodiment 1
[0022] A method for smelting vanadium-titanium ductile iron, which includes weighing furnace charges, smelting, spheroidizing and inoculating, using a 50Kg medium-frequency induction furnace for smelting, and the furnace materials used are as follows: 60% of vanadium-titanium pig iron, 35% of scrap steel, and the rest are ferrosilicon and Ferromanganese, etc.; during the smelting step, add iron oxide scales in an amount of 1% of the weight of the charge to the furnace charge, and the oxide scales are added to the bottom of the charge when smelting and charging; the oxide scales make the molten iron Titanium is preferentially oxidized and has no obvious effect on the content of other elements, thereby reducing the titanium content, weakening the anti-graphite spheroidization effect of titanium, and ensuring the graphite spheroidization in vanadium-titanium ductile iron. dephosphorization. After the charge is melted, add a certain amount of ferrosilicon to the molten iron to mak...
Embodiment 2
[0027] A method for smelting vanadium-titanium ductile iron, which includes weighing furnace charge, smelting, spheroidizing treatment and inoculation treatment, using a 50Kg medium-frequency induction furnace for smelting, and the furnace charge used is as follows: 60% of vanadium-titanium pig iron, 35% of vanadium-titanium cast iron return charge, and the rest It is ferrosilicon and ferromanganese, etc.; during the smelting step, add iron oxide scales in an amount of 0.5% of the weight of the charge into the furnace charge, and the iron oxide scales are added to the bottom of the charge during smelting; In the middle, the titanium in the hot metal is preferentially oxidized and has no obvious effect on the content of other elements, thereby reducing the titanium content, weakening the anti-graphite spheroidization effect of titanium, and ensuring the graphite spheroidization in the vanadium-titanium nodular iron. It also has a good dephosphorization effect. After the charge ...
Embodiment 3
[0032] A method for smelting vanadium-titanium ductile iron, which includes weighing furnace charge, smelting, spheroidizing treatment and inoculation treatment, using a 50Kg intermediate frequency induction furnace for smelting, the furnace charge used is as follows: 60% of vanadium-titanium pig iron, 20% of vanadium-titanium cast iron return charge, scrap steel 15%, the rest are ferrosilicon and ferromanganese, etc.; when carrying out the smelting step, add iron oxide scales with an addition amount of 1.5% of the charge weight in the charge, and the iron oxide scales are added to the bottom of the charge during smelting; During the melting process, the skin makes the titanium in the molten iron preferentially oxidized and has no obvious effect on the content of other elements, thereby reducing the titanium content, weakening the anti-graphite spheroidization effect of titanium, and ensuring the graphite spheroidization in the vanadium-titanium nodular iron. The skin also has ...
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