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 non coking coal?
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.
What do you mean by coking coal?
Coking coal, also known as metallurgical coal, is used to create coke, one of the key irreplaceable inputs for the production of steel. There are many varieties of coal in the world, ranging from brown coal or lignite to anthracite. … Coke is produced by heating coking coals in a coke oven in a reducing atmosphere.
Is there an alternative to coking coal?
This one is obvious – renewables! Blast furnaces need coal, but there is an alternative technology called an Electric Arc Furnace (EAF). This is responsible for approximately 30% of the world’s steel production and does not require coal.
What is coking coal used for in steel production?
The primary source of this carbon is coking coal. Coke, made by carburising coking coal (i.e. heating in the absence of oxygen at high temperatures), is the primary reducing agent of iron ore. Coke reduces iron ore to molten iron saturated with carbon, called hot metal.
What are 4 types of coal?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.
Why is Coke used instead of coal?
Since smoke-producing constituents are driven off during the coking of coal, coke forms a desirable fuel for stoves and furnaces in which conditions are not suitable for the complete burning of bituminous coal itself. Coke may be combusted producing little or no smoke, while bituminous coal would produce much smoke.
What is difference between coke and coal?
What is the difference between coal and coke fuel? Coal is a shiny, black fossil fuel that contains impurities, emits smoke when burned, and produces less heat than coke. Coke is a dull, black byproduct of coal that burns hotter and cleaner.
What is the name for the highest rank coal?
Anthracite. Anthracite is the highest rank coal. It is a black, shiny, hard rock and is not friable. It is low in volatile matter and this makes it difficult to burn in rotary kilns.
Which is best quality of coal?
What are the types of coal?
- Anthracite: The highest rank of coal. …
- Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite. …
- Subbituminous: Subbituminous coal is black in color and dull (not shiny), and has a higher heating value than lignite.
Which country has the best coal?
Can steel be manufactured without 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.
Can we live without coal?
Greenpeace said of the event “A decade ago, a day without coal would have been unimaginable, and in 10 years’ time our energy system will have radically transformed again.” But there have been claims that using wood pellets is actually speeding up not slowing climate change.
What is the difference between thermal and coking coal?
Thermal coal, also called steaming coal, has a lower energy content and higher moisture and is used to generate electricity. Metallurgical or coking coal has a higher energy content and lower moisture and is used to make iron, steel and other metals.
Is steel a raw material?
A World Steel Association Fact Sheet offers the following data on steel raw materials: Steel is an alloy consisting mostly of iron and less than 2% carbon. Iron ore is, therefore, essential for the production of steel, which in turn is essential in maintaining a strong industrial base.
What type of coal is used for steel?