



www.thecementgrindingoffice.com

All rights reserved © 20122015 The Cement Grinding Office







Cement
grinding installation sizing






2


Nonexhaustive list of equipments to be sized







2.2

List of the equipments (suite 2):









Item N°26:








Airslide of the mill outlet to the elevator.




This airslide is sized in the calculator.









Item N°27:








Bucket elevator.




A full presentation is available here:




BUCKET ELEVATORS




A small calculator was developed for sizing roughly a bucket
elevator:




BUCKET ELEVATORS SIZING




This bucket elevator is sized into the main calculator.









Item N°28:








Dust collection system of the bucket elevator.




See presentation on this site:




FILTERS




There are also two calculators giving design elements:




FILTERS CALCULATION




This filter is dimensioned in the main calculator.









Item N°29:








Mill separator.




We consider only the third generation of separators.




Let us recall the names of main separators and their supplier.




* O'Sepa (FLSmidth)




* Sepol (Polysius)




* Sepax (FLSmidth)




* SD (Sturtevant)




* Sepmaster (KHD)




* QDK (Pfeiffer)




* TSV (FCB)




* O&K (Orenstein & Koppel AG)




* PRESEP VTP (PSP Engineering a.s.)




* CTC SERIES (CEMTEC)




Several presentations are available on the separators and the
analysis their efficiency:




SEPARATORS




HIGH EFFICIENCY SEPARATORS




CEMENT COOLING INTO THE SEPARATOR




SAMPLING CAMPAIGN AROUND THE SEPARATOR




TROMP CURVE EXPLANATION




Il existe aussi un calculateur de dimensionnement:




HIGH EFFICIENCY SEPARATORS SIZING




Ainsi que des calculateurs d'analyse:




TROMP CURVE




LAGRANGE CORRECTION METHOD




COOLING INTO THE
SEPARATOR




The sizing calculator is mostly concerned with quantifying the
air required for separation.




The calculator considers a separator without cyclones but with
a great filter.




This is of course the most important parameter.




For the rest, one must see with the supplier.









Item N°30:








Separator filter.




This is a large bag filter.




This filter is dimensioned in the main calculator.









Item N°31:








Separator filter fan




This fan is sized in the main calculator.









Item N°32:








Impact flowmeter.




This equipment is configured in the transport of rejects to
the mill.




The type is defined with a supplier of these devices.




The design is not provided in this study.









Item N°33:








Rejects airslide.




This element is dimensioned in the main calculator.









Item N°34:








Finished product airslide.




This airslide is in two parts and is sized in the calculator.





www.thecementgrindingoffice.com









Item N°35:








Conveyor of cement to the top of the storage silo.




This may be a bucket elevator or an airlift.




These equipments are not designed here.









Item N°36:








Cement silo.




A 7 days capacity of production is a valid basis for sizing a
silo.




This equipment will not be developed here.









Item N°37:








Mill control.




In most cases this will be an expert system.




See the presentation on this topic:




MILL CONTROL SYSTEMS



2.3

Equipments not developed in this presentation:









Maintenance equipments





The compressed air system





Electrical systems





Other points of dedusting






3


Flowsheet and list of main equipment of the main calculator







3.1

Flowsheet:









This is a traditional system with a high efficiency separator.





The fines of separator are sent to a baghouse.





The mill has a separate ventilation system.





Flowsheet:







3.2

List of equipment:








1. Hoppers




2. Weighfeeders




3. Belt conveyor




4. Filter the weighfeeders section




5. Ball mill




6. Filter mill




7. Mill filter fan




8. Mill water injection system




9. Mill output airslide




10. Bucket elevator




11. Bucket elevator filter




12. Airslide to separator




13. Separator




14. Separator filter




15. Separator filter fan




16. Impact flowmeter




17. Airslide of rejects




18. Airslide of finished product




19. Mill Control






4


Link to calculator








GRINDING CIRCUIT SIZING





www.thecementgrindingoffice.com

All rights reserved © 20122015 The Cement Grinding Office
