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Hello everyone, I am the youngest girl in the factory.
How to solve the porosity of gray cast iron?
one) The charge should be properly managed. 
For the charge with severe rust or a lot of grease on the surface, 
it can only be used after cleaning or treatment.
two) For the charge with high gas content, 
it should be remelted and regenerated before it can be used.
three) An appropriate amount of rare earth can be added 
before the furnace for degassing
four) Control the appropriate molten iron release temperature 
and pouring temperature
five) The hearth, forehearth and molten iron ladle need to be dried
six) When pouring, avoid flow interruption
seven) The inoculant should be fully preheated
eight) When pouring, it is necessary to ignite and bleed air
Follow me, the youngest girl in the factory, 
see you in the next issue~


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