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question is not very clear, but if you are talking about Alkali bypass filter then reply is as below;

- Kiln gases are bypassed to reduce alkali concentration in the kiln system.

- alkali come from rawmaterial (mainly from limestone), fuel used or additive.

- This alkali get absorbed in the clinker if concentration is less.

- If concentration is more they recirculate and cause blocking in riser duct/ cyclone etc..

- so it become important to remove this alkali from the system, that why alkali filter is used, which trap the gases at very high temperature just before kiln inlet, were alkali are in gases state.

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12y ago
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Q: What is use of alkali bag filter in kutch cement plant in India?
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