REDUCTION OF 212 MICRON RETENTION

DEAR EXPERTS

I WANT TO REDUCE THE RETENTION ON 212 MICRON OF RAW MEAL FROM 3% TO LESS THAN 1% KEEPING THE 90 MICRON SAME.

AT PRESENT I AM GETTING 14% ON 90 MICRON WITH 3.5% ON 212 MICRON.

I AM HAVING POLYSIUS ROLLER PRESS CKT FOR RAW MEAL GRINDING. WHAT CHANGES ARE  REQUIRED IN PROCESS PARAMETERS LIKE SEPARATOR,SEPARATOR AIR,OUTPUT ETC.

PLEASE SUGGEST

SIDHANT

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re REDUCTION OF 212 MICRON RETENTION

Please check the PSD of your current raw mix.If it has wider PSD than you may reduce +212 micoron residue while maintianing +90 micron residue coarser from the current level by changing wider PSD to steeper PSD .It can be done by replacing first generation dynamic air separator by latest generation high efficiency separator. 

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re REDUCTION OF 212 MICRON RETENTION

Hi,

Usually the 90 micron residue is controlled with the grinding equipment and your 212 micron residue is governed by you separator setting.

Regards;

FJalali

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re REDUCTION OF 212 MICRON RETENTION

Dear,

    Pl clear  how lower  grinding pressure give narrow psd and high grinding pressure wider psd in case of 

      VRM- coal mil, raw mill and cement mill

     Roll press- raw mill and cement mill .

 GKS

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