coal testing and analysis methods

Methods

of

Coal Testing and Analysis

( Series-1)

Wide Publishing ( A Division of Wide Educational Products and Services)

7/1/1,Samar Sarani

( At Radio Galley,on DumDum Road ,Near Dumdum Chiria More )

Kolkata-700002.INDIA

Phone: +913325468733, Fax: +913325468733

Mobile No:+91 9339682179/ +91 9007744212

website:http://www.widepublishing.com

Wide Educational Products and Services. 7/1/1, Samar Sarani (At Radio Galley on Dumdum Road, Near Dumdum Chiriamore) Kolkata – 700002,

West Bengal, India. Phone : (033)25468733 / Fax : (033) 25468733 Mobile : 09339682179 / 09007744212. Email : [email protected].

Combustion Quality of Coal and Lignite

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Determination of Hard Groove

Index of Coal• Procedure:

• Take coal sample and pass it through 4.75 mm mesh

• Air dry it for 24 to 48 hours in well ventilated place

• After drying grind & Sieve it in 1.18 mm (ASTM16) and 6000micron (ASTM30 ) sieves

• At least 50% of the original sample should pass through 1.18mm sieve

• Take 50+ 0.1 grams of the sample of -1.183mm + 600micron size (passed through 1.18mm sieve and retained on 600micron sieve) in HGI instruments sample bowl



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Processing and Oil and Gas Fields Projects.


Determination of Hard Groove

Index of Coal

• Keep the 8 ball rollers of 25.400+0.003 mm dia on the sample and fix the sample bowl to the instrument

• Switch on the instrument

• The instrument will be stopped after 60+ 1 revolutions (in 3 Minutes)

• Remove the bowl from the instrument and sieve the sample through the 75 micron (IS 8) sieve

• Keep it in desiccators for 15 minutes

• Weigh the sample and its weight in M

• HGI is calculated by the formulae HGI = 13 + 6.93 × M

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Where ‘M’ is the mass of the sample passed through 75 microns sieve after grinding and measuring in

balance ( fig)

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MANAGEMENT ASPECTS For Fuel & Non – Fuel Minerals Producing

And User Industries




To determine the GROSS CALORIFIC VALUE OF coal samples using Auto

Coal Analyser

• To assess the heating value of Coal in terms of GCV to know the worth use of coal

• Procedure:

• Start the instrument and bring it to analyze mode

• Open the oxygen gas cylinder and see that the outward pressure should be 450 psi

• Calibrate the instrument with Benzoic acid pellet

• Accurately weighs 1 gram of Coal sample into crucible

• Prepare the combustion vessel as explained in the calibration procedure

• Draw 2 ltrs. Water in to the pipette from the pipette tank

• Release the water in to the bucket from the pipette by turning the stopper



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Sectors


• Transfer the bucket into the bucket well ,

place the prepared combustion vessel in

the

• bucket and connect the fuse leads to the

combustion vessel

• Enter the sample weight and id code and

press start button



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• Pre fire of 3 minutes and post fire 5 minutes time takes place automatically and GCV value will be displayed on the screen after 8 minutes

• Remove the combustion vessel from the bucket and expel the gases in it

• Clean and keep ready for next analysis

• Take out the bucket and transfer water back to reservoir

• Allow the analyzer to equilibrate

• Press menu and press (2) and select results

• Press menu and press (8) to enter the corrections of fuse wire, Moisture %, Ash %, nitrogen and sulphur values

• After entering the values for all the samples press menu and press (6) to get the print out of GCV values of all the samples



STRATEGIC MANAGEMENT OF ALLIANCE,MERGER AND

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Precautions to be taken

• Fasten the wire tightly under the sleeves

• Adjust the pressure of the oxygen cylinder to fill the bomb vessel slowly

• Care should be taken while the crucible with sample to avoid spillage of the sample

• Expel the gas slowly while diffusing the bomb vessel after analysis

• Repeat the analysis if any un burnt sample is found in the crucible after analysis

• Maintain correct water level in the pipette tank

• Calibration of the instrument should be done regularly to avoid errors



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Calibration procedure of GCV analyzer

• Weigh accurately one benzoic acid pellet in a crucible

• Place the crucible with in sample holder of combustion vessel and fix both ends of 10cms fuse wire in the both sleeves and arrange the wire in such a way that it is just above the sample

• Place the sample holder in the combustion vessel and close the lid tightly

• Fill the bomb with oxygen to a pressure of 450 psi (Automatically cut off)

• Fill the pipette of 2 liters capacity attached to the instrument with water from the tank



Combustion Quality of Coal and Lignite


• Draw water from pipette in to the bucket

• Transfer bucket in to the well and place prepared combustion vessel in the bucket and connect the fuse leads enter the sample weigh and id-code and press start button

• Pre fire and post fire takes place and GCV value will be displayed at the end of 8min

• Remove the combustion vessel from the bucket and expel the gases , clean and keep ready for the sample analysis

• Press menu and press (3) to select the current GCV value of the benzoic acid

• Press menu and press (4) to calculate calibration enter the standard GCV value 6318 and press yes



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Processing and Oil and Gas Fields Projects.


An Auto Coal Analyzer



Land Acquisition and Strategic Corporate Social Responsibility

Management - Manual For Resource Intensive Core Industries


Thank You



PROJECT ENVIRONMENTAL CLEARANCE ENGINEERING AND

MANAGEMENT ASPECTS For Fuel & Non – Fuel Minerals Producing

And User Industries


coal testing and analysis methods

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