OPERATIONAL PERFORMANCE OF A CONVENTIONAL TWO-COMPARTMENT BALL MILL GRINDING CIRCUIT AT DIFFERENT CEMENT PRODUCTIONS

Year 2018, Volume: 57 Issue: 2, 125 - 133, 01.06.2018

Ömürden Genç , A.hakan Benzer

https://doi.org/10.30797/madencilik.433928

Abstract

The purpose of the study is to assess the grinding and classification performance of a

conventional Polysius® two-compartment ball mill and a Sepol® dynamic air classifier closed

circuit process at Portland CEMI/42.5R and Portland composite CEMII/32.5R cement production

types. For this purpose, industrial scale sampling surveys were performed around the circuit.

JKSimMet Steady State Mineral Processing Software was used to perform mass balance around

the circuits. Size reduction performance of the ball mill was determined for the sampling cases.

Classification performance of the dynamic air classifier was evaluated based on the efficiency

curve approach. It was determined that, approximately 12% circuit capacity increase could be

achieved in composite cement production when ball mill, ball mill filter and air classifier power

consumptions were considered. This figure corresponded to overall energy savings of 7% in ball

mill grinding.

Keywords

Grinding, Ball mill, Air classifier, Cement, Energy

KONVANSİYONEL İKİ KAMARALI BİLYALI DEĞİRMEN ÖĞÜTME DEVRESİNİN FARKLI ÇİMENTO ÜRETİMLERİNDE İŞLETME PERFORMANSI

Abstract

Bu çalışmanın amacı, konvansiyonel Polysius® iki kamaralı bilyalı değirmen ve Sepol® dinamik

havalı sınıflandırıcı kapalı devre işleminin Portland CEMI/42.5R ve Portland kompoze CEMII/32.5R

çimento üretimlerinde öğütme ve sınıflandırma performanslarının değerlendirilmesidir. Bu

amaçla, devre etrafında endüstriyel örnekleme çalışmaları yürütülmüştür. JKSimMet Cevher

Hazırlama Yazılımı ile devre etrafında madde denkliği yapılmıştır. Bilyalı değirmenin boyut

küçültme performansı örnekleme dönemleri için belirlenmiştir. Dinamik havalı sınıflandırıcının

sınıflandırma performansı verimlilik eğrisi yaklaşımına göre değerlendirilmiştir. Bilyalı değirmen,

bilyalı değirmen filtresi ve havalı sınıflandırıcı enerji tüketimleri düşünüldüğünde, kompoze

çimento üretiminde devre kapasitesinde yaklaşık olarak %12’lik bir artış sağlanabilmektedir. Bu

değer, bilyalı değirmen öğütmesinde %7’lik bir enerji tasarrufuna karşılık gelmektedir.

Keywords

Öğütme, Bilyalı değirmen, Havalı sınıflandırıcı, Çimento, Enerji

References

• Aydoğan N.A., Benzer, A.H., 2011. Comparison of the Overall Circuit Performance in the Cement Industry: High Compression Milling vs. Ball Milling Technology. Minerals Engineering, 24, pp211-215
• Benzer, A.H., Ergun, Ş.L., Öner, M., Lynch, A.J., 2001. Simulation of Open Circuit Clinker Grinding. Minerals Engineering, 14 (7), pp701-710.
• Dundar, H., Benzer, H, Aydogan, N.A., Altun O., Toprak N.A., Ozcan, O., Eksi, D., Sargın A., 2011. Simulation Assisted Capacity Improvement of Cement Grinding Circuit: Case Study Cement Plant. Minerals Engineering, 24, pp205-210.
• Genç, Ö., Benzer, A.H., 2012. Size Reduction Performance Evaluation of Open Circuit Three- Compartment Industrial Scale Cement Grinding Tube Mill. XIIIth International Mineral Processing Symposium, Bodrum, Turkey, pp67-73.
• Genç, Ö., Benzer, A.H., 2016. Performance Evaluation of an Industrial Scale Twocompartment Cement Ball Mill and Dynamic Air Classifier Closed Circuit Process at Different Feed Conditions. 15th International Mineral Processing Symposium. Ekim, 19-21, İstanbul, pp187-201.
• Genç, Ö., Benzer, A.H., Ergün, Ş.L., 2006. Grinding Performance Evaluation of Two- Compartment Cement Grinding Ball Mills. 11th European Symposium on Comminution. Budapest, Hungary.
• Genç, Ö., Benzer, A.H., Ergün, Ş.L., 2008. Effect of High Pressure Grinding Rolls (HPGR®) on Grinding Performance of Two-Compartment Cement Ball Mill. 11th International Mineral Processing Symposium, Antalya, Turkey, pp69-74.
• Genç, Ö., Benzer. A.H., 2017. Performance Evaluation of a Conventional Closed Circuit Process at Different Cement Productions. New Trends in Mining, Proceedings of 25th International Mining Congress of Turkey, Antalya, Turkey, pp423.
• Hewlett, P.C., 2010. Lea’s Chemistry of Cement and Concrete, Fourth ed. Elsevier Butterworth- Heinemann, ISBN: 978-0-7506-6256-7.
• Madlool, N.A., Saidur, R., Hossain, M.S., Rahim, N.A., 2011. A Critical Review on Energy Use and Savings in the Cement Industries. Renewable and Sustainable Energy Reviews, 15, pp2042- 2060.
• Munn, N., Morrell, S., Morrison, R.D., Kojovic T., 2005. Mineral Comminution Circuits Their Operation and Optimization, JKMRC, Brisbane. Norholm, A.,1995. Notes on Energy Conservation, FL Smidth and Co. a/s, Seminar, İstanbul, Turkey.
• Polysius Co., 2018, Sepol® High Efficiency Separator. https://www.scribd.com/ d o c u m e n t / 1 0 5 6 7 8 1 6 9 / 1 5 9 2 - S E P O L - g b (accessed 29 May 2018) (Note:digital brochure)
• Svarovsky, L., 1984. Hydrocyclones. Holt, Rinehart & Winson Ltd., Eastbourne. Thomas, M., 2007. Optimizing the Use of Fly Ash in Concrete, Portland Cement Association Publication, USA.
• United States Geological Survey, 2016. Mineral Commodity Summaries. https://minerals.usgs. gov/minerals/pubs/commodity/gold/mcs-2016- gold.pdf (accessed 2 Sept 2016) (Note: digital report)