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ENHANCEMENT OF COAL FLOTATION BY ULTRASOUND

Journal Name:

  • İstanbul Yerbilimleri Dergisi

Publication Year:

  • 2006

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Ultrasonic treatment is widely used for surface cleaning during physical, chemical and physico-chemical processes in mineral processing. In this study, coal flotation with newly developed ultrasonically assisted flotation cells was investigated in detail. Representative hard coal slime samples from Prosper-Haniel Coal Preparation Plant located in Bottrop, Ruhr Region of Germany were used for this purpose. Ultrasonic flotation with variable frequency and power levels was carried out using Wemco type flotation machine with an impeller speed of 1200 rpm and 1.3 litre capacities. The reagent for coal flotation was Ekofol-440 with variable dosages during conventional and ultrasonic flotation experiments. The results of the release analyses showed that ultrasonic coal flotation yields more combustible recovery and lower ash values in concentrates than conventional flotation at similar reagent dosages.
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Abstract (Original Language): 
Ultrasonik işlemler cevher hazırlamadaki fiziksel, kimyasal ve fizikokimyasal süreçler esnasında çoğunlukla yüzey temizleme için kullanılmaktadır. Bu çalışmada, yeni geliştirilen ultrasonik dalga üreteçli flotasyon selüllerinin kullanımıyla gerçekleştirilen kömür flotasyonu detaylı olarak araştırılmıştır. Bu amaçla, temsili taş kömürü şlam numuneleri Almanya, Ruhr Bölgesi'ndeki Prosper-Haniel Kömür Hazırlama Tesisi'nden temin edilerek kullanılmıştır. 1200 dev/dak pervane dönüş hızı ve 1,3 litre hacim kapasitesine sahip Wemco tipi flotasyon makinasının kullanıldığı ultrasonik donanımlı flotasyon deneyleri, değişken frekans ve güç seviyelerinde gerçekleştirilmiştir. Konvansiyonel ve ultrasonikli flotasyon denemelerinde kömür flotasyonu reaktifi olarak değişken oranlarda Ekofol-440 isimli ticari kimyasal kullanılmıştır. Release analiz sonuçları aynı miktarda reaktif kullanımıyla ultrasonikli kömür flotasyon deneylerinde konvansiyonel kömür flotasyonuna oranla daha yüksek yanabilir verimle ve daha düşük kül içerikli konsantreler elde edilebileğini göstermiştir.
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  • 2
169-174
  • English

REFERENCES

References: 

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