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General
- Coal gas is a
flammable gaseous fuel made from coal and supplied to the user via a
piped distribution system.
- Coal gas is a mixture
of the calorific gases: hydrogen, carbon monoxide, methane and volatile
hydrocarbons, with small amounts of noncalorific gases - carbon dioxide
and nitrogen - as impurities.
- Coke is a solid
carbonaceous material derived from destructive distillation of low-ash,
low-sulfur bituminous coal.
Production &
Process
- Metallurgical coke is
produced by carbonization of coals or coal blends at temperatures up to
1400 K to produce a macroporous carbon material of high strength
and relatively large lump size.
- Metallurgical cokes
must have a high strength to support heavy loads in the blast furnace
without disintegration.
- Coke is a solid high
in content of the element carbon and structurally in the NON-GRAPHITIC
STATE: It is produced by pyrolysisof organic material which has passed,
at least in part, through a liquid orliquid-crystalline state during the
CARBONIZATION process.
- Metallurgical coke is
produced by destructive distillation of coal in coke ovens. Prepared
coal is "coked".
- The CLEAN COKE
Process is based on a conceptual plan,developed by United States Steel
Corporation, for converting On metallurgica1-grade coals to
metallurgical coke, chemical feedstocks,and liquid and gaseous fuels.
Coke oven gas is cooled and by-products are recovered.
Application &
Technology
- The principal
product, coke, is used primarily in the manufacture of pig iron which is
a major component in the production of steel.
Metallurgical coke is also used as filler coke for polygranular carbon
products.
- It is known, that
strong lamp metallurgical coke is produced at laminar coking process of
coal charges, its test result allowed to calculate, that prime cost
production of 1 ton blastfurnace coke according new technology will be
as 15-20% as less than on traditional one.
- Char made from coal
is an intermediate i n emerging technology for making formed coke in
continuous, clean, processes that utilize a wide range of coals.
- The realized and
actually prepared innovations of the ironmaking technology require the
further increasing of the properties of metallurgical coke.
- Coke making
technological process produces excellent quality of coke for given coals
blend and has the lowest pollution levels of comparable technologies.
Market
- Metallurgical coke is
usually exported from chinato other countries in large amount. China
exported 1.8 million tons of metallurgical coke to
America, earning US $100 million.
- Globally, the Coke
market is controlled by China due to the fact that China is the largest
steel producer, coke producer, coke consumer and coke exporter in the
world.
- Coke may be traded
anywhere in the world, but the pricing is benchmarked in China.
- Chinese coke industry
can maximise profit by limiting surplus production to export demand of
13 million tonnes annually.
- Russian coke chemical
industry has sufficient potential for coke provision of the russian
metallurgy. The condition of coke production in Russia remains on high
technical and technological level. The coke production in Russia is
facing deep reconstruction within coming 8-10 years.
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Production
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