SOx levels In Raw mill

Dear Sirs,

 I need one advise regarding SOx emissions in cement industry. 

Is it possible to reduce SOx by installing water spray system in Body of VRM. 

your opinion please, if not what are the other way to bring down Soz levels.

 

 

Regards,

SRP

 

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re SOx levels In Raw mill

 This problem was solved many years ago   in other industries, for example, in the melting of copper. Sulfur in oxidation condition mainly flies in the form of a SO2 compound. This gas is post-burned to SO3 in catalytic reactors. After that, it is passed through the water and sulfuric acid (H2SO4) is produced either through the lime milk and get techno-gypsum  (CaSO4*2H2O).



 
Regards,

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re SOx levels In Raw mill

The level of SO2 emission depends on fuel and raw material source. See the limits in the article attached. Most of SO2 from fuel used in kiln will be absorbed by material in calciner and preheater cyclone and create a cycle of sulfur there. Only SO2 from calciner fuels and raw material goes to stack.

Usually raw mill acts as a barrier and absorbs some of the SO2 produced. Water removal of SO2 is poor so scrubbers use a mix of water and fine limestone or synthetic gypsum to reduce SO2.

Let me know if you need more info.

Regatds;

FJalali

 

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re SOx levels In Raw mill

Thank you for your reply.

 

Regards,

SRP

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