Washery grade 4 28 to 35 % Grades of Semi coking and weakly coking coals are defined on the basis of ash and moisture content in coal as below: Grade Ash + Moisture. Grade 1 Less than 19%
What is a grade coal?
The gradation of non-coking coal is based on Gross Calorific Value (GCV), the gradation of coking coal is based on ash content and for semi coking /weakly coking coal it is based on ash plus moisture content, as in vogue as per notification.
What is the difference between coking coal and non coking coal?
A non-caking coal is that coal which on heating in absence of air doesn’t from a coherent mass of residue. … A coking coal is that coal which on heating in absence of air leaves a solid residue. A non-coking coal also leaves a solid coherent residue which may not possess the physical & chemical properties of the coke.
What is UHV coal?
The gradation of non-coking coal is based on Useful Heat Value (UHV), the gradation of coking coal is based on ash content and for semi coking / weakly coking coal it is based on ash plus moisture content , as in vogue as per notification.
Which content is higher in Indian coal?
Jharkhand, Odisha, Chhattisgarh, West Bengal, Madhya Pradesh, Telangana and Maharashtra accounted for 98.26% of the total known coal reserves in India. As on 31 March 2018, Jharkhand and Odisha had the largest coal deposits of 26.06% and 24.86% respectively.
What are the 4 types of coal?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite.
Which is the best grade of coal?
What is Coke vs coal?
By distilling bituminous coal in retorts to obtain gas for illumination, or by burning it in kilns or pits, the residue left behind is called coke, which is simply coal charcoal, and is nearly pure carbon.
Can steel be made without coking coal?
Coking coal is usually bituminous-rank coal with special qualities that are needed in the blast furnace. While an increasing amount of steel is being recycled, there is currently no technology to make steel at scale without using coal.
How is Coke coal?
Coking coal is converted to coke by driving off impurities to leave almost pure carbon. The physical properties of coking coal cause the coal to soften, liquefy and then resolidify into hard but porous lumps when heated in the absence of air. Coking coal must also have low sulphur and phosphorous contents.
How is coal GCV calculated?
GCV= 7115.197 – 123.971*M – 81.3121*A + 20.7421*FC, Where GCV in kcal/kg and moisture, ash, fixed carbon in air dried percentage basis.
What is ranking of coal?
Coal rank is the measure of the degree of organic metamorphism (coalification) of a coal, ranging from low-rank peat to high-rank meta-anthracite.
Which coal has no caking power?
Non Coking Coal does not have any caking properties and it is mainly used as thermal coal for power generation. It has a higher ash content and also used in industries like cement, fertilizer, glass, ceramic, paper, chemical and brick manufacturing.
Which state is rich in coal?
Coal ReservesStateProvedTotalJHARKHAND4556383152ODISHA3739179295CHHATTISGARH2042857206WEST BENGAL1415631667Ещё 12 строк
Which state is the largest producer of coal?
The top five states in India with the largest coal reserves
- Jharkhand – 83.15 billion tonnes. …
- Odisha – 79.30 billion tonnes. …
- Chhattisgarh – 57 billion tonnes. …
- West Bengal – 31.67 billion tonnes. …
- Madhya Pradesh – 27.99 billion tonnes.
How can we improve the quality of coal?
(1) Improve Heat Rates The higher the ash content of coal, the lower the heating value of that coal . By removing the ash through washing, the coal’s heating value can be improved dramatically . This means that less coal must be burned to produce a comparable amount of electricity .