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2015
March
C
Cupola Questionaire
Cupola Questionaire
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What are 5 things you can do for low carbon equivalent in the cupola?
Turn blast cfm down
Add graphite to iron stream
Add coke booster
Check oxygen - turn on if off
Raise running coke in charge
Raise hot blast if turned down.
Adjust amount of silicon or carbon injection, if being used
What are 3 things you can do if there is high carbon equivalent coming out of the cupola?
Turn blast cfm up
Turn oxygen off
Lower hot blast
Lower running coke in charge
Adjust amount of silicon or carbon injection, if being used
What are 5 things you can do if there is low carbon in the cupola?
Turn blast cfm down.
Add graphite to iron stream
Add coke booster
Raise running coke in charge
Check oxygen - turn on if off
Turn up hot blast if it is turned down.
Increase carbon block additions in charge mix, if being used.
Increase graphite tuyere injection, if being used
What are 4 things you can do for high carbon in the cupola?
Turn blast cfm up
Turn oxygen off
Lower hot blast.
Lower running coke
Decrease carbon block additions in charge mix, if being used
Decrease graphite tuyere injection, if being used.
What are 3 things you can do if there is low silicon in the cupola?
Turn blast cfm down
Check oxygen - turn on if off
Add ferrosilicon to iron stream
Raise running silicon carbide in charge
Increase Silica Carbide (SiC) tuyere injection, if being used
What are 3 things you can do if there is high silicon in the cupola?
Turn blast cfm up
Turn oxygen off
Lower running silicon carbide in charge
Lower amount of lump silicon in charge, if being used
Decrease SiIica Carbide (SiC) tuyere injection, if being used
What do you do if there is high chromium in the cupola?
Check scrap for high chrome material
Lower Chrome Brick if it is being used
Substitute charge material to eliminate chrome potential
PLANT 6: What do you do if there is high sulfur coming out of the Dwell Ladle?
Make sure lime and or fluorspar is turned on.
Make sure Lime and or fluorspar bin is not empty
Ensure fluorspar flow rate is what is being called for
Give at least 2 examples of what could cause you to be melting on relief?
Check blast flow. Contact maintenance if flow is noted.
Check blast duct purge valve Reduce flow and check to see if melting stops.
Check Nitrogen purge valve for O2 nozzles. Should be 7 psi.
Check Oxygen valves. Close off manual shut offs and see if melting stops
How often should the tap hole be rodded?
At least once an hour
Once every 2 hours
At least 8 hours
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