What is non coking grade coal?
A non-coking coal is that coal which when heated in the absence of air leaves a coherent residue. This residue does not possess the physical and chemical properties of the coke and is not suitable for the manufacture of coke.
What is the difference between non coking coal and coking coal?
Noncoking coals have higher ash content and are typically used in thermal power plants as steam coals. Coking coal is the type of coal which on heating in the absence of air undergoes a transformation into a plastic state, swells, and then solidifies to form coke.
Which coal is used for coke preparation?
coking coal
Metallurgical coal, also known as coking coal, is used to produce coke, the primary source of carbon used in steelmaking.
What is difference between coking coal and coke?
The key difference between coking coal and thermal coal is that coking coal is mainly used to produce high-quality coke, whereas thermal coke is important in producing electricity. Coal is a type of sedimentary rock that is combustible. It appears in black or brownish-black colour.
Can steel be made without coking coal?
Now, nearly all new steel globally is produced using iron oxide and 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.
Which is the best grade of coal?
Anthracite
Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite.
Who uses coking coal?
2 Coal is used in iron and steel industry. Coking coal is an essential input for production of iron and steel. The largest single use of coal in the steel industry is as a fuel for the blast furnace and for the production of metallurgical coke for reduction of iron ore or for injection with the hot blast.
What is coking used for?
Coking is a refinery unit operation that upgrades material called bottoms from the atmospheric or vacuum distillation column into higher-value products and, as the name implies, produces petroleum coke—a coal-like material.
What is metallurgical coal used for?
Metallurgical coal (or “coking coal”) is mined to produce the carbon used in steelmaking, while thermal coal is used to make steam that generates electricity.
Can you make steel without coking coal?
What are non-coking coals?
non-coking coal also leaves a solid coherent residue which may not possess the physical & chemical properties of the coke. The non-coking coals are those coals which may form a solid-residue but may not be suitable for manufacture of coke.
Can non-coking coal replace pitch in coke production?
Non-coking coal was found to yield a good product coke with pitch, the cost of which was prohibitive. Hence, replacement of pitch with abundantly available, cheaper biomass material was considered.
What are the uses of non coking coal in ironmaking?
Non coking coal has three uses in ironmaking. It is mainly used (i) for pulverized coal injection (PCI) into blast furnace, (ii) for the production of direct reduced iron (DRI) in coal based direct reduction processes, and (iii) for ironmaking by Corus, Finex and other iron smelting processes.
Does blending biomass material with non-coking coal produce good Coke?
The effect of blending different biomass material with Indian non-coking coal is investigated. Non-coking coal from Western Coalfields Limited (WCL), Nagpur, India with high volatile matter was used in the experiment. The idea behind this paper was to produce reasonably good coke and match its property according to standards.