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Oct 15, 2019#0183;#32;In view of the above analysis of the advantages and disadvantages of the coal separation process and the practical problem of the removal of sulfur in the finegrained coal, it is urgent to develop a joint process suitable for the removal of the coal ash and efficient removal of organic sulfur. The process can remove inorganic mineral impurities and some sulfurcontaining minerals in the fine coal by the
Recovered coal particles comprise a substantial part of the feed carbon values. A process for reducing the sulfur and ash content of coal particles wherein coal particles are treated in an aqueous...
A process for reducing the sulfur and ash content of coal wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coaloil aggregates. The coaloil...
A process for reducing the sulfur and ash content of coal wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coaloil aggregates. The coaloil aggregates are separated from ash and mineral matter in the slurry by dissolved gas flotation. Optionally, the coal particles may be treated with a conditioning agent prior to the aggregation step.
A process for reducing the sulfur and ash content of coal comprising the steps of:(1) contacting coal particles containing ash and iron pyrite mineral matter with a promoting amount of at least one conditioning agent capable of modifying or altering the existing surface characteristics of the pyrite under conditions to effectuate alteration or modification of at least a portion of the
A process for reducing the sulfur and ash content of coal particles wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coaloil aggregates having modified particle size and density characteristics.
A process for reducing the sulfur and ash content of coal wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coaloil aggregates. The coaloil aggregates are separated from ash and mineral matter in the slurry by dissolved gas flotation.
Different microorganism was reviewed for process of sulfur removal from coal. For effective removal of inorganic sulfur thiobacillus ferrioxidans had favorable for pyritic sulfur 90% and for
PROCESS FOR REMOVING SULFUR FROM COAL ABSTRACT OF THE DISCLOSURE, A process for reducing the sulfur content of coal, by the treatment of coal particles, contained in an aqueous slurry, of flotable coaloil particles, with an oxygencontaining gas as elevated temperature and pressure, comprising the steps of: (a) feeding the oxygencontaining gas and the aqueous slurry Or floatable coal
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During process of combustion harmful gases emitting due to ash and sulfur contain in it had negative effect on environment as well as coal associated plants.
PROCESS FOR PRODUCING LOW_ASH, LOW_SULFUR COAL. rites, can be removed from coal by leaching finesize coal with a hot caustic physical separation process which reduced both the ash and total sulfur contents.
A process for reducing the sulfur and ash content of coal wherein coal particles are treated with a conditioning agent in an aqueous slurry prior to agglomeration with a minor amount of hydrocarbon oi
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A process is disclosed for removing sulfur and ash, particularly clay and pyrite from coal particles having a mesh size of 30 or less. A slurry of coal particles is agitated in an ultrasonic mixer...
demineralization and desulfurization increased with the increase in alkali/coal ratio. The removal of total sulfur and ash increases with increasing leaching temperature and time. As a result of MCL, ash content of Hazro coal was reduced from to %, and 70% of combustible was recovered. Total
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A process for reducing the sulfur and ash content of coal comprising: treating coal particles in a hydrocarbon oil slurry with minor amounts of a conditioning agent and water to effect agglomeration of ash and pyritic sulfur mineral matter; separating the agglomerates from the slurried coal particles; and recovering coal particles from the hydrocarbon oil.
Sulphur in coal is found in both inorganic and organic forms and sulphates. Inorganic sulphur, in the form of pyrite (FeS2), can be removed from coal relatively easily simply by washing the coal.
In Pat. No. 4,328,002, there is disclosed a process for treating coal to remove sulfur and ash which involves the steps of preconditioning coal particles in the presence of an aqueous solution of an oxidizing agent,, detergent; washing the pretreated coal with water; contacting the coal with an aqueous solution of an oxidizing agent until an exothermic reaction between the coal and oxidizing
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