Met coal typically contains more carbon, less ash and less moisture than thermal coal, which is used for electricity generation.
What is thermal coal?
Thermal coal, as the name implies, is used in energy generation for heating, but it is also used for cement manufacturing and other industrial purposes. Metallurgical coal is primarily mixed with iron ore to produce iron and steel.
What coal is used in metallurgy?
What type of coal is coking coal?
What is PCI coal used for?
Pulverised Coal Injection coal (PCI) – coal used for its heat value and injected directly into blast furnaces (without an intermediate coking phase) as a supplementary fuel, which reduces the amount of coke required and therefore costs. PCI coal can also be sold into the thermal coal market.
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.
Which country has the cleanest coal?
Which type of coal is best?
Who is the largest coal exporter?
Why is coal bad for you?
Coal impacts: air pollution
They include mercury, lead, sulfur dioxide, nitrogen oxides, particulates, and various other heavy metals. Health impacts can range from asthma and breathing difficulties, to brain damage, heart problems, cancer, neurological disorders, and premature death.
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.
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 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.
Can steel be made 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.
How much coal does it take to make a ton of steel?
Around 0.6 tonnes (600 kg) of coke produces 1 tonne (1000 kg) of steel, which means that around 770 kg of coal are used to produce 1 tonne of steel through this production route. Basic Oxygen Furnaces currently produce about 74% of the world’s steel. A further 25% of steel is produced in Electric Arc Furnaces.
Why pulverized coal is used?
Pulverized coal firing ensures complete combustion of coal, thus ensuring higher efficiency of steam generators. It is predominantly adopted in large coal-fired utility boilers. The finer the grinding of coal, the more efficient its combustion.