Recovery of energy values from high-ash content washery tailings using waste oils by oil agglomeration

Yadav, Anand Mohan; Singhal, Hritik; Agarwal, Divya; Suman, Siddharth

doi:10.1080/01496395.2021.1973500

Cited by 5 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bu sorunun üstesinden gelmek için atık yağlar kullanılarak aglomerasyon sürecinin iyileştirilmesine yönelik çalışmalar yapılmıştır. Ayrıca atık motor yağı kullanılarak yapılan sınırlı sayıda çalışma bulunmaktadır [10][11][12].…”

Section: Introductionunclassified

Ilgın Linyit Kömürünün Yağ Aglomerasyonunun Ultrasonik Proses ile İyileştirilmesi

Eşmeli

2024

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi

View full text Add to dashboard Cite

Bu çalışmada, ultrasonik sistemin ılgın linyit kömürünün yağ aglomerasyonu üzerine etkisi incelenmiştir. Ultrasonik cihazının uygulanma güç değerleri ve süresinin kömür süspansiyonunun kül içeriği ve yanabilir verim değerleri üzerindeki etkisi belirlenmiştir. Bu bağlamda ultrasonik sistemin güç değerinin artması kül değerleri üzerinde olumlu bir etki yaratırken, yanabilir verim değerlerini ise negatif yönde etkilemiştir. Kül içeriğindeki azalma ultrasonik cihazın kavitasyon etkisine bağlanırken, yanabilir verimdeki azalma ultrasonik cihazın kömür yüzeylerinde yarattığı değişime bağlanmıştır. Ayrıca, ultrasonik cihazın belirli bir sürelerde uygulanması (1-3 dakika) kül içeriğini azaltmış, yanabilir verim değerlerini artırmıştır. En iyi sonuçlar ultrasonik işlemin 90 Watt güç değerinde ve 3 dakika uygulanma süresi ile elde edilmiştir. Optimum koşullar altında, geleneksel deneylerde %55,59 verimlilikle %18,39 kül içeriğine sahip kömür elde edilirken, ultrason ön işlemiyle%10,02 kül içeriğine sahip kömür %64,59 verimlilikle elde edilmiştir. Bu sonuçlar, ultrasonik ön işlemin ince taneli kömürün zenginleştirilmesinde etkili bir yöntem olabileceğini göstermiştir.

show abstract

Section: Introductionunclassified

Ilgın Linyit Kömürünün Yağ Aglomerasyonunun Ultrasonik Proses ile İyileştirilmesi

Eşmeli

2024

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi

View full text Add to dashboard Cite

show abstract

“…The continuous quest for new technologies to combat the rising coal demand has led to increased mechanization of mining for the development of various coal cleaning techniques, which have resulted in generating millions of tons of fines. [2][3][4] These high-ash-content fines are often considered waste. They are either discarded or blended with coarse coal.…”

Section: Introductionmentioning

confidence: 99%

Flotation response of coal washery reject fines: Characteristics, process optimization, and oxidation

et al. 2023

View full text Add to dashboard Cite

The present paper outlines the characterization, electrokinetic behaviour, and flotation response of rejected coking coal fines with 32.5% ash generated in a coal washery in Eastern India. The response methodology and central composite rotatable design (RSM-CCRD) were used for the process modelling and optimization of the flotation process using diesel, methyl isobutyl carbinol (MIBC), and sodium hexametaphosphate as a collector, frother, and depressant to maximize ash reduction, yield, and combustible recovery. At optimum condition, a 9.7% clean ash coal was achieved with a 63% yield at collector, frother, and depressant dosages of 0.78, 0.31, and 0.80 kg/ton, respectively. The model prediction and experimental data corroborated sufficiently. Subsequently, within 1 year, the fines oxidized and did not float with the collector. Fourier-transform infrared spectroscopy (FTIR) confirmed surface oxidation on oxidized coal. The oxidized coal responded favourably to acid oil, a vegetable oil refinery waste. With acid oil as a collector, the oxidized coal can upgrade to 12% clean ash coal with a 60% yield; the combustible recovered is 80%. The work indicates successful upgradation of fresh and oxidized coal using the froth flotation process.

show abstract

“…Coal is also frequently loaded with high inorganic contents (ash content) which are deemed as other constituent contributing to the concerns regarding coal utilization in addition to high sulfur and nitrogen content [8]. Majority of these inorganics consists of silica (50-60%), alumina (25-30%), iron oxide (5-10%), and other alkali and alkaline earth metal oxides are about 5-10% [9].…”

mentioning

confidence: 99%

A physical coal cleaning approach for clean energy production from low grade Lakhra coal of Pakistan using diester table

Asif,

Hussain,

Riaz

et al. 2023

JPIChE

View full text Add to dashboard Cite

In this work coal from Lakhra (coal mine in Pakistan) was subjected to a physical technique for mineral matter and sulfur reduction by using diester table. Effect of particle size and coal-to-water ratio of slurry were studied. A reduction of 85% in sulfur content and 88% in ash content for 500 µm coal sample was observed. While at 300 µm size sulfur and ash content were reduced about 77% and 80% respectively. At 150 µm size, the reduction in sulfur and ash was observed to be lesser (54% and 55% respectively) due to the decrease in specific gravity difference of coaland impurity (i.e. sulfur and ash). GCV increased from 17.2 MJ/kg of the raw coal to 23.3 MJ/kg of cleaner fraction obtained at 500 µm. Based on the results of this study, diester table can be proposed to be a simpler however an effective physical coal cleaning method to reduce sulfur and ash content. Besides other parameters, particle size is a crucial parameter to impact the cleaning efficiency and because of the greater difference in specific gravity of coal and impurity, higher particles size used in this study resulted in the cleanest product.

show abstract

Recovery of energy values from high-ash content washery tailings using waste oils by oil agglomeration

Cited by 5 publications

References 20 publications

Ilgın Linyit Kömürünün Yağ Aglomerasyonunun Ultrasonik Proses ile İyileştirilmesi

Ilgın Linyit Kömürünün Yağ Aglomerasyonunun Ultrasonik Proses ile İyileştirilmesi

Flotation response of coal washery reject fines: Characteristics, process optimization, and oxidation

A physical coal cleaning approach for clean energy production from low grade Lakhra coal of Pakistan using diester table

Contact Info

Product

Resources

About