QA Testing Laboratories - Why Testing Coal and Coke??

Coal India Limited (CIL) is striving to usher in transparency and accountability within the entire production and sale process of coal for all stakeholders including citizens of India. Third-party Sampling provides a transparent mechanism to scrutinise the coal quality of the coal dispatched to customers and to curb disputes among all its stakeholders. Also, coal grade assessment plays a crucial role in revisiting mine grades.

Impact of Coal Quality on furnace Efficiency

• Most steel mills have tight control of coal/coke ash and sulphur.
• Coke ash features a negative impact on furnace fuel consumption and stable furnace operation thanks to its catalytic effect on coke reactivity and its alkalis’ attack on the furnace lining, while coke sulphur increases furnace fuel consumption and reduce hot metal quality.
• Coke ash and sulphur are often associated with coal ash and sulphur alright  During the coal to coke transformation, coal ash reports completely to coke while coal sulphur partially reports to coke. Therefore, the ash and sulphur contents of coal blends got to be controlled.
• A decrease in coal moisture results in a rise in coal bulk density and coking rate within the coke oven chamber, which contributes to the development of coke quality.

Impact of Coal Quality on Boiler Efficiency

• Changes in coal property lead to efficiency variation and therefore the designer might not be ready to demonstrate the guarantees.
• There are many factors that influence the efficient combustion of coal leading to optimum boiler efficiency.
• Roughly 50% of the losses are often tuned to the optimum and therefore the other 50% is governed by fuel properties like hydrogen in fuel, moisture in fuel, and ambient air conditions.
• Environmental legislation requires reduced NOx and SOx emissions.
• Sulphur combining with moisture, especially within the Air Heater area of the boiler where condensation is probably going to require palace, end in the formation of H2SO4 which can attack the Air Heater elements.

Independent coal testing agencies play an important role in coal and coke industries for choosing appropriate market and industry for the given coal. With the increasingly stringent environmental policies, the accuracy of coal analysis results in help in optimizing disposal and storages of reject coal, coal slurries, ash and slag. A lump of poor quality coal produces NOx, SOx and ash in reasonably great quantity as compared to good quality coal, therefore the pre-treatment before processing and disposal can enhance the economy of the plant. The coal analysis results provided by us help coal producers and processing industries choose the cleaning equipment, parameters, and probable amount of by-products. The optimization of by-products and pollutants not only save the environment from poisonous hazards also enhances the economy of the plant.

QA Testing Laboratories are into Analysis of complete parameters of coal and coke which are utilized in various power plants and steel industries, as coal analysis plays a crucial role in both the industries, there are mainly three sorts of the est we do:

• Proximate Analysis: Determines moisture, volatile matter, fixed carbon and ash content. Proximate analysis is reported by percent on as-received, moisture-free, and moisture-ash-free bases. For coalbed methane, the proximate analysis, particularly moisture, ash, and volatile matter, is that the most vital for gas content and adsorption.
• Ultimate Analysis: Determines carbon, hydrogen, nitrogen, oxygen, and sulphur contents, which are reported as pa per cent on as-received and moisture-ash-free bases. the last word analysis is vital for the classification of coal by rank.
• Gross Calorific Value Analysis: Determines calorific value or heating value. It indicates the quantity of warmth that's released when the coal is burned.

QA Testing Laboratories are following different Indian Standards to check these parameters

• IS 1350: Part 1 Method of test for Coal and Coke: Part 1 Proximate Analysis
• IS 1350: Part 2 Method of test for Coal and Coke: Part 2 Determination of Calorific Value
• IS 1350: Part 3 Method of test for Coal and Coke: Part 3 Determination of Sulphur
• IS 1350: Part 4 Method of test for Coal and Coke: Part 4 Ultimate Analysis
• IS 4433 Method for Determination of hard grove Grind ability index of coal

And ASTM (American Society for Testing and Materials) International Standard like ASTM D3172 – 13 (Standard Practice for Proximate Analysis of Coal and Coke), ASTM D3176 – 15 (Standard Practice for Ultimate Analysis of Coal and Coke).

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