Determination of correlation between specific energy consumption and vibration of a raw mill in cement industry

Year 2016, Volume: 17 Issue: 1, 209 - 219, 25.04.2016

Adem Atmaca , Nihat Atmaca

https://doi.org/10.18038/btda.11251

Cited By: 2

Abstract

In cement industry about 110 kWh of electrical energy is consumed to produce one ton of cement and about 26% of the total electrical power is used during farine production. In this study, certain measures are implemented in an existing raw mill in a cement factory and the specific energy consumption of the unit is calculated to be 25.52 kWh/ton farine. The effects of ball charge rate, moisture content and size of feeding materials on vibration of main driving motors are investigated. The data collected over a 12-month period indicate that vibration directly related to the specific energy consumption (SEC) of the unit. The vibration on the motors of the raw mill is decreased by about 12% as the moisture content and size of the raw materials decreased by half. By this way, specific energy consumption of the unit decreased to 25.19 kWh/ton farine. Keeping the vibration values on the main driving motors less than 4 mm/s by periodical maintenance, the specific electrical energy consumption of the mill has reduced by 2.16% to 24.97 kWh/ton farine which corresponds to a saving of 0.55 kWh per ton of farine production.

DETERMINATION OF CORRELATION BETWEEN SPECIFIC ENERGY CONSUMPTION AND VIBRATION OF A RAW MILL IN CEMENT INDUSTRY

Abstract

Çimento endüstrisinde 1 ton çimento üretimi için yaklaşık 110 kWh elektrik enerjisi tüketilmektedir ve toplam elektrik enerjisinin yaklaşık %26’sı farin üretimi sırasında harcanmaktadır. Bu çalışmamızda bir çimento fabrikasında çalıştırılmakta olan farin değirmeninden belirli ölçümler alınmış ve ünitenin özgül enerji tüketim değeri 25,52 kWh/ton farin olarak hesaplanmıştır. Bilye doluluk oranı, malzeme nem miktarı ve üniteye beslenen hammadde ebatlarının ana tahrik motorları üzerindeki titreşim değerlerine olan etkisi incelenmiştir. 12 ay boyunca düzenli olarak toplanan veriler, değirmen titreşim değerlerinin ünitenin özgül enerji tüketim (ÖET) değerlerini doğrudan etkilediğini ortaya çıkarmıştır. Hammaddenin içerdiği nem oranının yarıya düşürülmesiyle ana tahrik motorları üzerindeki titreşim değerlerinin yaklaşık %12 oranında azaldığı tespit edilmiştir. Bu sayede, ünitenin özgül enerji tüketimi 25,19 kWh/ton farin değerlerine düşürülmüştür. Düzenli bakımla ana tahrik motorlarındaki titreşim değerlerinin 4 mm/s değerinin altında tutulmasıyla, değirmenin özgül enerji tüketim değeri %2,16 düşerek, 1 ton farin için yaklaşık 0,55 kWh’lik bir enerji tasarrufunu sağlanmış ve değirmenin enerji tüketimi 24,97 kWh/ton farin değerine düşürülmüştür

Keywords

Çimento, Farin değirmeni, Titreşim, Enerji, Öğütme

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