Coal Preparation Plant Market - Global Industry Analysis, Growth 2023
Operational
efficiency of a coal preparation plant plays a vital role in the
profitability of mining operations. Coal preparation is a series of
operations that are interconnected through a material handling system.
The material handling system is a part of the slurry transport system.
Actual cleaning processes lies in the heart of the coal preparation
processes.
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Coal
preparation begins with procurement of raw coal and producing a final
product that can be sold into the market by removing the impurities.
Most commonly coal preparation, is carried out in water based processes
and makes high use of slurry transport procedures and principles. It is
considered as processing of raw coal to produce products that are
marketable and do not hamper the physical and chemical properties of the
coal. It is a heterogeneous material which is made up of different
types of coal and varies with quantity of mineral matter. After mining,
it generally contains all the layers of coal and impurities that are
found in the seam. In a preparation plant, crushing and removing of all
the impurities takes place in order to transport coal as a marketable
product.
Four
basic types of operations are used in cleaning of coal such as
comminution, concentration, dewatering and sizing. Comminution is
carried out to reduce the coal into smaller size. Depending on the
various sizes involved, the coal is crushed and broken. Breaking is
generally carried out on the largest coal size, crushing is used for mid
ranges sizes and grinding is carried out for finest sizes. Grinding is
done prior to utilization process. Coal preparation facilities have
different size ranges for similar types of coals. Sizing is carried to
separate the coal into various products characterized according to the
size. Concentration is used for separating the coal into numerous
products that are characterized by some type of physical differences. It
is the heart of coal preparation process, where actual cleaning takes
place and impurities are then separated from coal. They are generally
accomplished in dense medium vessels, jigs and water only cyclones. It
can also be accomplished for other type of unit operations such as
sulfur removal by crushing process to liberate the sulfur particles.
Further, screening or classifying is carried out to achieve separation.
Dewatering
takes place to remove the moisture that clings to the coal. A finer
type of coal has large surface area and high moisture content.
Dewatering is generally carried out by mechanical methods, and is
conducted for generating a damp type cake. If further dewatering is
required then dryers are used for evaporation. Thermal dryers generate
large amount of dust that is easily scrubbed off from air and is then
generally disposed. A common type of byproduct for dewatering is removal
of super fine type coal, in which high content of ash is found along
with traces of sulfur and surface moisture. This process is also known
as desliming.
Coal
preparation processes takes place in to types: firstly, those takes
place in water medium and secondly, those takes place in a mixture of
water and high gravity material such as magnetite.
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Stringent
government rules and regulation and environmental norms are some of the
key drivers of the coal preparation plant market. However, high storage
and transportation costs can hamper the growth of the market.
Advancements in technology bring new opportunities for the coal
preparation plant market.
Some
of the key companies in the business of coal preparation plant market
are Mongolian Mining Corporation, Zenith Mining and Construction
Machinery Co. Ltd., SGS Group management S.A., Green Fields Coal Company
and Roberts & Schaefer Company among others
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