ash fusion temperature of coal

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Ash Analysis | Energy | SGS

SGS proximate coal ash analysis services include: Ash Fusion. An SGS ash fusion test gives you an indication of the softening and melting behavior of coal ash at high temperatures within the boiler. Critical ash softening temperatures are determined by monitoring the increasing deformation of the sample as it is heated.

Development of a LIBS system for prediction of ash fusion ...

losses). Information on coal elemental composition, and some other characteristics of the coal, like ash fusion temperatures, can help make decisions on these operational actions. The coal-ash fusion temperature is a parameter widely used as a slagging propensity index of coal. However, this type of information is not typically provided to

1.2 Anthracite Coal Combustion

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

AF700 Ash Fusion Analyzer from LECO | Labcompare.com

The AF700 Ash Fusion Determinator automatically monitors ash cone deformation temperatures in coal ash, coke ash, and mold powders using Windows-based software. It increases laboratory throughput using predefined ash fusibility temperatures (IT, ST, HT, and FT) automatically determined by the software's Image Recognition Functions (IRF).

Chemical and Specialty Coal, Kentucky Geological Survey ...

Other properties. Low ash-fusion temperature: The mineral fraction of the Blue Gem is dominated by siderite, rather than silicates. This gives the coal a low ash-fusion temperature that is favorable in the production of silicon metal (Gardner and …

CORRELATION BETWEEN ASH FUSION TEMPERATURES (AFT) …

Sep 09, 2014· In the present investigation, few Indonesian coal samples have been selected to find out the direct effect of ash chemical composition and ash fusion temperatures. 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 ...

Re: Ash fusion temperature - Page 2 of 3

May 08, 2011· re Re: Ash fusion temperature. Dear sir, Pl send me formula for calculation on ( [email protected]) 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

Analysis of Coal Ash

• Ash chemistry. • Ash petrography. • Ash resistivity. ASH TESTING ASH FUSION Understanding the behavior of coal ash at high temperature is critical in determining ideal coals for steam power generation. The ash fusion test gives an indication of the softening and melting behavior of coal ash at high temperatures within the boiler.

Coal Quality Testing Lab | Biofuels Testing | Sigmatest

Ash Fusion Temperature: The behavior of coal's ash residue at high temperature is a critical factor in selecting coals for steam power generation. Most furnaces are designed in a manner that can remove ash residue. Coal ash that converts into a clinker which is hard glassy slag is usually requires cleaning and is unsatisfactory.

5E-AF4115 Ash Fusion Determinator - YouTube

Apr 06, 2017· 5E-AF4115 Ash Fusion Determinator is used to determine ash cone deformation temperatures in coal ash, coke ash and mold powders automatically, which are critical to the boiler functioning properly ...

Ash fusion temperature - Page 1 of 3

Apr 08, 2011· Re: Ash fusion temperature. Dear Mr.Ted, As per my understanding the higher the ash fusion temperatures better will be its performance in terms of fouling and slagging in power plant boiler tubes. High alkali containing fly ashes generally do have low ash fusion temperatures.Indonesian coal which is largely used in power plants.

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

Coal Properties, Sampling & Ash Characteristics

relationship to coal ash chemistry, melting & slagging properties, and fusion temperature. There are not distinct melting points for coal ash like with ice or other pure compounds, s o 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

Correlation between the critical viscosity and ash fusion ...

The extent of coal ash slag penetration and refractory brick dissolution depends on the slag viscosity, the gasification temperature, and the composition of slag and bricks. We measured the viscosity of several synthetic coal ash slags with a high-temperature rotary viscometer and their ash fusion temperatures through optical image analysis.

Ash Fusion, Coal Analysis, Kentucky Geological Survey ...

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 for Testing and Materials, 2013, p. 431–435).

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

Mineralogical, petrographic and geological controls on ...

site 1. Another important result is that low ash fusion temperatures are encountered in the fines rather than the raw coal. In terms of geological distribution, the lowermost bands appear to exhibit the lowest ash fusion temperatures. Mineralogical, petrographic and geological controls on coal ash fusion temperature

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 ...

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.

Relationship between coal ash composition and ash fusion ...

1. Introduction. The coal ash fusion temperature (AFT) is an important parameter on coal ash fouling and slagging properties. It determines the behavior of coal ash in the processes of coal combustion, gasification, liquefaction and ash utilization,, .It can cause slagging problems on combustion chamber and pipe surfaces and decline heat transfer efficiency, .

Coal assay - Wikipedia

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.

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 SiO2, Al2O3, CaO, Fe2O3, and MgO were subjected to the standard test for ash fusibility. The computer software package FactSage has been used to calculate the liquidus temperatures of coal ash ...

Standard Test Method for Fusibility of Coal and Coke Ash

5.1 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 was chosen.

Understanding the Business of Coal - Ash Fusion ...

Jul 24, 2017· Coal Slags and Ash Fusion Temperatures The Ash Fusion Temperature, AFT, test became popular in the 1920's as a way to judge clinkering …

Ash Fusion Temperature - an overview | ScienceDirect Topics

Bruce G. Miller, in Clean Coal Engineering Technology, 2011. Ash Fusion. The ash fusion temperature is a measure of when the ash will melt and transform from a solid to liquid state. This temperature is an important parameter for the design and operation of gasification systems, for those that operate below the ash fusion temperature so as not to incur fusion, sintering, or clinkering of the ...

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 …

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

Model PAF 2014 Coal Ash Fusion System - Preiser Scientific

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 …

Factors Influencing Slagging and Fouling

Ash Fusibility. Fusion temperatures provide an indication of the temperature range over which portions of the ash will be a molten fluid or semi-molten, plastic state. High fusion temperatures indicate that ash released in the furnace will cool quickly to a nonsticky state resulting minimal potential for slagging.

Predicting Coal Ash Fusion Temperature of South …

Predicting Coal Ash Fusion Temperature Of South Sumatera's David Bahrin Blended Coal With Coal Blending Simulation And Laboratory Analysis SISEST 2009 - RUSNAS PEBT AI X - 3 Figure 3. Ash fusion temperature of blended coal samples from the results of laboratory analysis. From figure 3, ash fusion temperature for all