The effect of some dispersants on grindability of coals

Objective & Hypothesis:In this study, the effect of PSS and NSF anionic dispersants on the grindability of Zonguldak bituminous coal and İstanbul-Yeniköy brown coal were investigated.

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Key Findings & Data:Grinding experiments were carried out at various pulp concentrations (50%, 55%, 60%) and at various grinding times (15-30-45-60 minutes).

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Conclusion & Impact:Hence,it is not forgetten that an energy saving of 60-70% is not attainable in an industrial application.

🔬Design:Research Article

📍Scope:Comprehensive Sample

⚙️Variables:Domain Parameters

Abstract

In this study, the effect of PSS and NSF anionic dispersants on the grindability of Zonguldak bituminous coal and İstanbul-Yeniköy brown coal were investigated. Grinding experiments were carried out at various pulp concentrations (50%, 55%, 60%) and at various grinding times (15-30-45-60 minutes). By using PSS and NSF dispersants while grinding the coal, grinding conditions were improved and viscosity was decreased by less than 1000 m.Pa.s. Under the optimal concentration conditions with PSS and NSF (0.3% and 0.7%),using PSS in grinding,70% energy savings Zonguldak coal,and 60% energy savings for İstanbul coal were obtained.On the other hand, using NFS, these rations were 45% and 47%, respectively. However, viscosity increase related to long milling period in laboratory scale continuous experiments is not possible for industrial application as expected. Hence,it is not forgetten that an energy saving of 60-70% is not attainable in an industrial application.

Özet

Bu çalışmada, PSS (Sodyum poli styrene sulfonat) ve NSF (Naftalin sülfonat formaldehit kondensat) anyonik dağıtıcı kimyasalların Zonguldak bitümlü kömürü ile İstanbul-Yeniköy linyit kömürünün öğütülebilirliğine etkileri araştırılmıştır. Öğütme deneyleri farklı pülpte katı oranlarında (%50,55,60) ve öğütme sürelerinde (15-30-45-60 dakika) gerçekleştirilmiştir. PSS ve NSF dağıtıcı kimyasalların kömürlerin öğütme aşamasında kullanımıyla, öğütme şartları iyileştirilmiş ve öğütme ortamında 1000 m.Pa.s’den küçük viskozite değerleri elde edilmiştir. PSS ve NSF ile tespit edilen optimum konsantrasyon koşullarında (%0,3 ve %0,7), öğütme ortamında PSS’nin kullanımıyla Zonguldak kömürü ile gerçekleştirilen öğütmede %70 ve İstanbul kömürü ile gerçekleştirilen öğütme de ise %60 oranında enerji tasarrufuna gidilebileceği saptanmıştır. NSF kullanımı ile bu oranlar sırası ile %45 ve %47 olarak bulunmuştur. Ancak, laboratuvar bazında uygulanan kesikli öğütmede uzun öğütme süresine bağlı olan viskozite artışı endüstriyel uygulamalarda da beklenen oranlarda olmayacağından, %60-70 büyüklüklerinde enerji tasarruflarının endüstriyel uygulamalarda elde edilemeyeceği gözardı edilmemelidir

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Cite This Article

ATEŞOK, G., MÜTEVVELLİOĞLU, N. A., DİNÇER, H., BOYLU, F. (2005). The effect of some dispersants on grindability of coals. Madencilik Dergisi, Cilt: 44 - Sayı: 2, 25–35. https://ajindex.com/articles/282212

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