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Bituminous Coal

Name: bituminous coal;soft coal;pechkohle;metallophyton;carbolapideus
Carbon content: 75%~90%
Proportion: about 1.2-1.5
Volatiles: about 10%-40%
Relative density: 1.25 to 1.35
Calorific value: about 27170-37200 kJ/kg

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Bituminous coal

Name: bituminous coal;soft coal;pechkohle;metallophyton;carbolapideus;

Carbon content: 75%~90%

Volatiles: about 10%-40%

Relative density: 1.25-1.35 g/cm3

6500-8900 kcal/kg


Description 

Bituminous coal has a moderate degree of coalification.Carbon content 80% to 90%, hydrogen content 4% to 6%, oxygen content 10% to 15%.  According to the volatile content, the thickness of the colloidal layer or technical properties, it can be divided into long-flame coal, gas coal, fat coal, coking coal, lean coal and lean coal

Bituminous coal is an organic sedimentary rock formed by diagenetic and sub metamorphic compression of peat bog material. Its primary constituents are macerals: vitrinite, and liptinite. The carbon content of bituminous coal is around 60–80%; the rest is composed of water, air, hydrogen, and sulfur, which have not been driven off from the macerals. Bank density is approximately 1346 kg/m³ (84 lb/ft³). Bulk density typically runs to 833 kg/m³ (52 lb/ft³). The heat content of bituminous coal ranges from 24 to 35 MJ/kg (21 million to 30 million BTU per short ton) on a moist, mineral-matter-free basis.

When the coal is burned, it produces a high, white flame. Bituminous coal is so-called because it contains a tar-like substance called bitumen. There are two types of bituminous coal: thermal and metallurgical.

Characteristics of Bituminous Coal

Bituminous coal contains moisture up to approximately 17 percent. About 0.5 to 2 percent of the weight of bituminous coal is nitrogen. Its fixed carbon content ranges up to approximately 85 percent, with ash content up to 12 percent by weight. Bituminous coal can be categorized further by the level of volatile matter it contains high-volatile A, B, and C, medium-volatile, and low-volatile. Volatile matter includes any material that is liberated from the coal at high temperature.

In the case of coal, volatile matter may include sulfur and hydrocarbons.

Heating value: Bituminous coal provides approximately 10,500 to 15,000 BTU per pound as mined.

Availability: Bituminous coal is abundant. More than half of all available coal resources are bituminous.


Application 

1. It is used as a fuel.

2. Coking coal or metallurgical coal has a high heat resistance & it’s used to create a product called coke (not the soft drink), which is then added to a blast furnace and combined with iron ore as well as limestone to produce steel.

3. Bituminous coal is made free from sulfur, ash, as well as some other impurities, & it’s used in coal forges, in which metals are heated & then shaped.


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