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CONTROL VALVES ON WELL/HEAD SEPARATOR SKIDS IN COAL SEAM GAS PLANTS ... LCV valve controls the liquid level ... METAL design and seating surface hard .
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Anthracite is a hard, compact variety of coal that has a submetallic luster. It has the highest carbon content, the fewest impurities, and the highest energy density ...
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In the first step of the direct coal liquefaction process the coal is ... This can be minimised by the use of suitable hard ... Other coal liquefaction valve ...
Anthracite is often referred to as "hard coal"; however, this is a layman''s term and has little to do with the hardness of the rock. Anthracite coal: ...
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The invention discloses a bidirectional hard sealing ball valve for a coal chemical industry. The bidirectional hard sealing ball valve comprises a top entry valve ...
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Bituminous coal or black coal is a relatively soft coal containing a tarlike substance called bitumen or asphalt. ... Coking coal is heated to produce coke, a hard, ...
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