Cupola Questionaire

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