ash fusion temperature of coal

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  • Prediction of coal ash fusion temperatures using ,

    The coal ash fusion at a low temperature, encourages the formation of a clinker that gathers around the heat transfer pipes and thereby corrodes the furnace components It is well-known that the ash clinkering may lead to channel burning, pressure drop, and an unstable gasifier operation Van Dyk et al...

  • COAL PHYSICAL TESTING

    The ash fusion test gives an indication of the softening and melting behavior of coal ash at high temperatures within the boiler Ash fusion temperatures are determined by heating a prepared sample of molded coal in a high-temperature furnace to temperatures exceeding 1,000 oC in both reducing and oxidizing conditions The cone or pyramid of ....

  • What is the effect of ash fusion temperature of coal in ,

    If the ash fusion temperature is low say 1000 degree celsius it may be helpful for binding of coal and coke Higher ash fusion temperature also should help in binding whish is arequirement for ....

  • Ash Fusion Temperature

    Ash fusion temperature is a concern for some operators Where ash fusion temperature is low there is a risk of lance blockage caused by the formation of slag deposits near the tip of the injection lance Residual coal moisture after drying affects the transport characteristics and coke replacement ratio of pulverised coal...

  • Energies 2015 OPEN ACCESS energies

    generally require pulverized coal with a high ash fusion temperature to prevent slagging, whereas the liquid-state slag-tap boilers require a low ash fusion temperature 1 Coal-fired power plants use the method of additive blending or coal blending to meet ash fusibility and other requirements, such as reducing slagging and ash deposition...

  • Ash Fusion Temperatures

    Ash fusion temperatures give an indication of the softening and melting behavior of fuel ash These temperatures are widely cited in fuel specifications for boilers despite a relatively poor record of correlating with slagging or fouling behavior...

  • Ash Fusion Temperature Coal Consultant

    Mar 10, 2017 0183 32 ASH FUSION TEMPERATURE Ash Fusion Temperature menggambarkan karakteristik pelunakan dan pelelehan ash, dan diukur menurut standar prosedur tertentu dengan cara pemanasan secara gradual terhadap sample yang sudah disiapkan dalam bentuk cone untuk selanjutnya diamati profil perubahannya Temperatur dicatat pada sifat-sifat yang menunjukkan...

  • Correlating The Slagging of A Utility Boiler With Coal ,

    CORRELATING THE SLAGGING OF A UTILITY BOILER WITH COAL CHARACTERISTICS Rod Hatt Coal Combustion, Inc Versailles, KY 859-873-0188 ABSTRACT This paper will describe how a utility was able to correlate intermittent slagging problems a boiler was experiencing with coal ash chemistry The coal ash fusion temperatures alone were not sufficient to be...

  • 12 Anthracite Coal Combustion

    Typically coal rank increases as the amount of fixed carbon increases and the amount of volatile matter decreas Anthracite coal is a high-ranking coal with more fixed carbon and less volatile matter than bituminous, subbituminous, or lignite varieti Anthracite also has higher ignition and ash fusion temperatur...

  • Chemical Analyses and Physical Properties of 12 Coal ,

    forms of sulfur, ash-fusion temperatures, free-swelling index, and real specific-gravity determinations for 12 coal samples from ia and West ia_____ 10 3 Major and minor oxide and trace-element composition of the laboratory ash of 12 coal samples from ia and West ia_____ 16...

  • Slagging and Fouling Indices

    Slagging and Fouling Indices Index Formula Slagging or Fouling Propensity Low Mediu m High Severe Ash Fusion Sphere softening temperature under reducing conditions gt 1350 CaO MgO...

  • Anthracite Coal Characteristics and Applications

    Dec 30, 2018 0183 32 Anthracite is considered nonclinkering and free-burning because when it is ignited it does not coke or expand and fuse together It is most often burned in underfeed stoker boilers or single-retort side-dump stoker boilers with stationary grat Dry-bottom furnaces are used because of anthracite s high ash fusion temperature...

  • Model PAF 2014 Coal Ash Fusion System

    The Preiser Scientific Ash Fusion System is designed to determine ash cone deformation temperatures in coal and coke ash per ASTM Standard D-1857 and ISO Standard 540 CO/CO2 reducing atmosphere option The Model PAF 2014 is comprised of a ,...

  • Ash Fusion, Coal, Kentucky Geological Survey, University ,

    Ash fusion, also called fusibility, is a test to determine how the ash residue remaining from combustion of a coal will react in a furnace or boiler In this test, coal ash is put into conical molds as specified in ASTM method D1857-04 guidelines and procedures American Society ,...

  • 42 Major Gasification Solid Byproducts netldoegov

    Slag production is a function of ash content, so coal produces much more slag than petroleum coke Regardless of the feed, as long as the operating temperature is above the fusion temperature of the ash, slag will be produced...

  • coal utilization Volatile Matter Chemistry ,

    The amount and nature of the ash and its behaviour at high temperatures affect the design and type of ash-handling system employed in coal-utilization plants At high temperatures, coal ash becomes sticky ie, sinters and eventually forms molten slag The slag then becomes a hard, crystalline material upon cooling and resolidification...

  • Ash related Issues in Biomass Combustion

    Within ThermalNet, WP2D particularly focuses on ash related issues in biomass combustion A key deliverable is a report summarizing the issues, which is currently available in draft for comments In the ash one can distinguish inorganic components contained in the biomass, as well as extraneous inorganic material such as sand...

  • Avoiding Clinker Formation in Thermal Power Plant Boilers

    Good quality coal having more gross calorific value, less ash content, less mineral content in the coal, and ash fusion temperature above 1500 C must be used to avoid clinker formation Regular watch must be done on poking Precautions may avoid clinker formation and its deposition in boilers Precaution is the best solution...

  • Challenges of Burning PRB Coal

    The elevated temperatures of the gas leaving the furnace often results in ash entering the convection passes that is above its fusion temperature Thus this ash will deposit on the superheat and reheat surfaces and further reduce the ability of the furnace to make steam conditions...

  • Effect of Coal Ash Composition on Ash Fusion Temperatures ,

    The ash fusion temperatures AFTs of coal mineral matter at high temperature are important parameters for all gasifiers Experiments have been conducted in which mixtures of selected coal ashes and SiO 2, Al 2 O 3, CaO, Fe 2 O 3, and MgO were subjected to the standard test for ash fusibilityThe computer software package FactSage has been used to calculate the liquidus temperatures of coal ....

  • Ash Fusion Tester Ashing combustion analysis

    Ash Fusion Tester can be used for ashing to combustion analysis the four characteristic temperatures Deformation Temperature - DT, Softening Sphere Temperature - ST, Hemisphere Temperature - HT amp Flow Fluid Temperature - FT of coal and coke ash ,IMP...

  • Standard Test Method for Fusibility of Coal and Coke Ash

    51 The design of most coal combustion and coal conversion equipment anticipates that the ash either remain solid or assume some degree of fluidity, depending on the particular design Ash fusibility temperatures help predict whether the ash will perform properly in the process for which the coal ,...

  • Influence of Coal Quality and Boiler Operating Conditions ,

    ash chemistry, melting slagging properties, and fusion temperature There are not distinct melting points for coal ash like with ice or other pure compounds, so when melting is mentioned it is used to represent a decrease in viscosity, rather than a melting point When coal ash melts it occurs on both a large scale and a microscopic scale...

  • Coal Sampling and Analysis Standards

    Coal sampling and analysis standards 8 441 Preparation of coal ash 58 442 Major and minor elements 59 443 Trace elements 61 45 Miscellaneous analysis 64 451 Chlorine 64 452 Mercury 65 453 Mineral matter in coal 66 454 Ash fusibility 66 455 Coal...

  • Wood ash composition as a function of furnace temperature

    WOOD ASH COMPOSITION AS A FUNCTION OF FURNACE TEMPERATURE , but fusion of the ash did not occur hr the 600 176 C ash CaCO 3 and K 2Ca CO 3 2 were , with low ash and sulfur content However, as with coal, the problems of ash deposition on heat transfer surfaces in boilers and on...

  • Bituminous Coal Characteristics and Applications

    Jan 14, 2019 0183 32 Bituminous coal can be categorized further by the level of volatile matter it contains high-volatile A, B, and C, medium-volatile, and low-volatile Volatile matter includes any material that is liberated from the coal at high temperature In the case of coal,...

  • Welcome to Coalstandards

    Ash Fusion Standard Certified Reference Materials and Calibration Standards for Coal and Coke Laboratories VS7-001 AFT in coal ash 15 g SRM is a calibration standard for Ash Fusion Temperatures in both reducing and oxidizing atmospher Vanguard Solutions, Inc PO Box 1970 ....

  • CORRELATION BETWEEN ASH FUSION TEMPERATURES AFT ,

    Sep 09, 2014 0183 32 In the present investigation, few Indonesian coal samples have been selected to find out the direct effect of ash chemical composition and ash fusion temperatur Experimental The composition of several coal ashes were determine by ASTM D6349-09 method using Perkin Elmers Optima 700 DV, ICP-OES The sample digestion was carried out in a ....

  • Gasification of high ash, high ash fusion temperature ,

    This invention relates to gasification of high ash bituminous coals that have high ash fusion temperatur The ash content can be in 15 to 45 weight percent range and ash fusion temperatures can be in 1150degree C to 1500degree C range as well as in ,...

  • Re Ash fusion temperature

    May 08, 2011 0183 32 re Re Ash fusion temperature Dear sir, Pl send me formula for calculation on girish_1966 yahooin Can we used for calculation for pet coke ash fusion temp Any relation of high sulphur coal have low fusion temp With regards gks Reply...