Preparation of clean coal by flotation following ultra fine liberation

Bokányi, Ljudmilla; Csõke, Barnabás

doi:10.1016/s0306-2619(02)00181-2

Cited by 22 publications

(8 citation statements)

References 2 publications

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“…Optimum solid liquid ratio of the asphaltite was found to be 10 %. The importance of clean fuel is growing in respect of effective combustion as well as of environmental impact [Bokanyi and Csöke, 2003].…”

Section: Resultsmentioning

confidence: 99%

“…The mineral matter and sulfur, which are present in varying amounts in all solid fossil fuels, are a major problem. One of the primary goals of fuel beneficiation is the removal of pyrite and other mineral matter in order to decrease the amount of sulfur dioxide emissions, increase the heating value of the fuel, and minimize problems caused by ash during and after combustion [Abdollahy et al, 2006;Bokanyi and Csöke, 2003;.…”

Section: Introductionmentioning

confidence: 99%

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Desulfurization and Demineralization of Asphaltite Using Combination of Froth Flotation and Aqueous Caustic Leaching

Saydut

Duz

Aydın

et al. 2008

Energy Exploration & Exploitation

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The mineral matter and sulfur, which are present in varying amounts in asphaltites, are a major problem in utilization of asphaltites as a fuel. The effect of leaching asphaltites from Sırnak and Silopi, SE Anatolia, Turkey, with froth flotation following aqueous sodium hydroxide on desulfurization and deashing was investigated. Froth flotation reduced the ash content of asphaltite by 35.8 % and 35.3 %, pyritic sulfur 22.55 % and 8.7 % (wt %) and its volatile matter content by 28.9 % and 28.9 %. The asphaltite flotation yield was 79.1 % and 85.3 %. Never organic sulfur could be removed by froth flotation. The asphaltite concentration obtained from flotation was leached using aqueous sodium hydroxide and its organic sulfur content was reduced by 60.8% and 61.9 %. Hence using combination of the two methods, the total sulfur, ash and volatile matter contents was reduced by 76.4% and 71.4 %, 38.1 % and 38.3 %, 44.1 % and 47.2 %, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Desulfurization and Demineralization of Asphaltite Using Combination of Froth Flotation and Aqueous Caustic Leaching

Saydut

Duz

Aydın

et al. 2008

Energy Exploration & Exploitation

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“…Oil agglomeration gets a great importance as a technology for coal and shale treatment as it is reported that oil agglomeration technique is superior to flotation for delivering higher combustible recoveries (Abdel Khalek and Parekh, 2001;Polowczyk et al, 2018). The oil agglomeration was extensively utilized for fines aggregation and minerals selective separation like coal treatment however its application on kerogen recovery from oil shale is limited (Polowczyk et al, 2018;Özer et al, 2017;Bokanyi and Csoke, 2003;Ceylan and Kucuk, 2004). Oil agglomeration could be defined as "aggregation of hydrophobic low sized particles in the existed bridging oil that is distributed into the suspended aqueous solid particles".…”

Section: Introductionmentioning

confidence: 99%

“…It refers to synergism between cationic and anionic surfactants during oil agglomeration. Also, surfactant existence during bridging oil emulsification causes smaller diameter of oil droplets and resulting in larger agglomerates (Bokanyi and Csoke, 2003). Polowczyk et al reported that the carbonaceous metal-bearing shale could be agglomerated using kerosene with cationic-anionic surfactants mixture.…”

Section: Introductionmentioning

confidence: 99%

Impact of cationic-anionic surfactants on selective oil agglomeration of oil shale

Hassan¹,

Khalek²,

Amin³

2020

Physicochem. Probl. Miner. Process.

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Egyptian oil shale from Red Sea area is upgraded via oil agglomeration technique to achieve a clean fuel. A representative sample is characterized to identify its undesirable components and its liberation size. The quartz, apatite, calcite, siderite and anhydrite are the main gangue minerals. The sample was pulverized to less than 20 µm for efficient liberation. The impact of anionic (Calcium dodecyl benzene sulfonate, CDBS) or/and cationic (Cetrimonium bromide, CTAB) surfactants on the zeta-potential and agglomeration process was investigated in presence of different kerosene concentrations. A concentrate of 62% kerogen with 95% recovery was obtained from feed of 29% kerogen using 0.1% CTAB/CDBS mixture in 2% kerosene emulsion.

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“…That is, coals with different origins and locations differ. Bokányi and Csöke (2003) demonstrated through experiment the feasibility of segregating distinct petrographic components of Bituminous coal from Southern Hungary and determined the degree of liberation based on petrographic composition, flotation kinetic study of isolated components (groups of components), scanning electron microscopy and microprobe analyses. Oki, Yotsumoto and Owada (2004) studied a way to estimate the degree of mineral liberation by the sink float separation data of coal with Equation 2.4.…”

Section: Comminutionmentioning

confidence: 99%

Parametric Study of Coal Liberation Behavior Using Silica Grinding Media

Adeniji¹

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This study evaluates the coal liberation behavior using silica as the grinding media by assessing the effects of four operating factors including nominal feed size, media size, shaft speed and grinding time, each of three levels on two response variables, the product P80 and the specific energy. The coal material used in this study was mixed-phase particles commonly referred to as middlings, sampled from dense medium circuit at the Leatherwood preparation plant in Kentucky. One-third fractional factorial design of resolution III was implemented. Since silica was obtained in three standard size ranges as per manufacturer's design, media size was qualitative while other factors were quantitative. My undiluted gratitude goes to Almighty Allah for the gift of life and the successful completion of my second master's program. I thank my family most especially my wife, Olabimpe Cynthia Fasuyi and my daughter, Bushrah Ebunoluwa Adeniji. I appreciate my parents and my in-laws for their support through the challenging times. I cannot thank my thesis advisor, Dr.

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Preparation of clean coal by flotation following ultra fine liberation

Cited by 22 publications

References 2 publications

Desulfurization and Demineralization of Asphaltite Using Combination of Froth Flotation and Aqueous Caustic Leaching

Desulfurization and Demineralization of Asphaltite Using Combination of Froth Flotation and Aqueous Caustic Leaching

Impact of cationic-anionic surfactants on selective oil agglomeration of oil shale

Parametric Study of Coal Liberation Behavior Using Silica Grinding Media

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