Desulfurization/vermiculization/inoculation-integrated vermicular cast iron modifier and preparation technique thereof
A technology of vermicular graphite cast iron and modifier, applied in the field of vermicular graphite cast iron production, can solve the problems of cumbersome and time-consuming operation, decreased casting quality, creeping failure, etc., and achieves the effect of simple and reliable preparation process, reducing the influence of fluctuation and reducing the penetration speed.
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Embodiment 1
[0033] A desulphurization, vermicularization and inoculation integrated vermicular graphite cast iron modifier, the weight percentage of each component is: limestone powder 6%, rare earth magnesium alloy particles 78%, scaly high-purity graphite powder 16%. Its specific preparation steps are:
[0034] (1) Material crushing and pulverizing: control the crushing particle size of rare earth magnesium alloy to 8mm, crush and grind limestone, and control the particle size to 50 mesh;
[0035] (2) In one mixing process, the rare earth magnesium alloy and graphite powder are mixed in a certain proportion, and water glass is used as the binder, and the addition amount is 6% of the total amount of graphite, and the graphite powder is adhered to the surface of the rare earth magnesium alloy by stirring equipment. Natural curing for 5 minutes;
[0036] (3) Secondary mixing After the primary mixing is naturally solidified, limestone powder is added in a certain proportion, and water glas...
Embodiment 2
[0041] A desulphurization, vermicularization and inoculation integrated vermicular graphite cast iron modifier, the weight percentage of each component is: limestone powder 7%, rare earth magnesium alloy particles 80%, scaly high-purity graphite powder 13%. Its specific preparation steps are:
[0042] (1) Material crushing and pulverizing: control the crushing particle size of rare earth magnesium alloy to 9mm, crush and grind limestone, and control the particle size to 60 mesh;
[0043](2) In one mixing process, the rare earth magnesium alloy and graphite powder are mixed in a certain proportion, and water glass is used as the binder, and the added amount is 6.5% of the total amount of graphite. Natural curing for 6 minutes;
[0044] (3) Secondary mixing After the primary mixing is naturally solidified, limestone powder is added in a certain proportion, and water glass is used as a binder. The amount added is 6.5% of the total limestone. The limestone powder is adhered to th...
Embodiment 3
[0049] A desulphurization, creeping and inoculation integrated vermicular graphite cast iron modifier, the weight percentage of each component is: limestone powder 7.5%, rare earth magnesium alloy particles 78.5%, scaly high-purity graphite powder 14%. Its specific preparation steps are:
[0050] (1) Material crushing and pulverizing: control the crushing particle size of rare earth magnesium alloy to 11mm, crush and grind limestone, and control the particle size to 70 mesh;
[0051] (2) Mixing the rare earth magnesium alloy and graphite powder in a certain proportion, and using water glass as the binder, the addition amount is 7% of the total amount of graphite, and the graphite powder is adhered to the surface of the rare earth magnesium alloy by stirring equipment. Natural curing for 7 minutes;
[0052] (3) Secondary mixing After the primary mixing is naturally solidified, limestone powder is added in a certain proportion, and water glass is used as a binder, and the addit...
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