I cannot foresee that reduces the load of dust entering a filter will have any detrimental effect on its performance. Certainly no problem with an ESP. Your point regarding fine dust blinding the cloth of fabric filters may be valid, but I would be surprised.

We will appreciate your support clarifying the following points:
1-False air effect upon the (increase/decrease) of dust load in a closed system of air swept type ball mill (between the mill outlet duct-seperator-cyclones-filter-stack). 2 - Also, will the dust resistivity increase/decrease?

Do you think that pre-dedusting in a raw mill circuit by means of cyclone with a separation efficiency of 91-93 will have negative influence on the raw mill bag filter or ESP in regard to the fact that after pre-dedusting only rather fine grain and rather low quantity of dust will enter the filter? Could it become difficult to clean the bags due to fine dust getting deeper into the pores of the filter bag and could the fine dust have negative influence on the ESP?

Our facility operates two Humboldt air-swept ball mills for raw meal production. Combined capacity is 100tph. We would like to optimise the raw meal circuit, in particular, mill loading. Unfortunately, there appears to be very little information on the optimisation of air-swept mills. How can mill throughput be improved, utilising existing equipment? The separator is a mechanical classifier, with adjustable vanes. Current reside set point is 15 per cent on 90 micron. We currently use sonic ears to determine mill loading, with mill and fan current also available. There is also a proposal to implement a grit return weigh system to determine the recirculating load. Would this be worthwhile addition, with any positive process benefits? In summary, we wish to determine the most cost effective means of attaining optimal material levels in the milling circuit, with the intention of automating the operation sometime in the future.