Anthracite Filter Media

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Anthracite Filter Media

Anthracite (Greek aνθρακίτης (anthrakítes), "coal-like," from άνθραξ (ánthrax), coal) is a hard, compact variety of mineral coal that has a high luster. It has the highestcarbon content, the fewest impurities, and the highest calorific content of all types of coals, which also include bituminous coal and lignite.

Anthracite is the most metamorphosed type of coal (but still represents low-grade metamorphism), in which the carbon content is between 92.1% and 98%. The term is applied to those varieties of coal which do not give off tarry or other hydrocarbon vapours when heated below their point of ignition. Anthracite ignites with difficulty and burns with a short, blue, and smokeless flame.

Properties

Anthracite is similar in appearance to the mineraloid jet and is sometimes used as a jet imitation. Anthracite differs from ordinary bituminous coal by its greater hardness, its higher relative density of 1.3–1.4, and lustre, which is often semi-metallic with a mildly brown reflection. It contains a high percentage of fixed carbon and a low percentage of volatile matter. It is also free from included soft or fibrous notches and does not soil the fingers when rubbed. Anthracitization is the transformation of bituminous into anthracite.

The moisture content of fresh-mined anthracite generally is less than 15 percent. The heat content of anthracite ranges from 22 to 28 million Btu per short ton (26 to 33 MJ/kg) on a moist, mineral-matter-free basis. The heat content of anthracite coal consumed in the United States averages 25 million Btu/ton (29 MJ/kg), on the as-received basis (i.e., containing both inherent moisture and mineral matter). Since the 1980s, anthracite refuse or mine waste has been used for steam electric power generation.

References  From Wikipedia, the free encyclopedia

" MAYMOUNTAIN " BRAND  Anthracite Filter Media

Anthracite Filter Media

Grade

Size(mm)

Effective 
Size (mm)

Uniformity 
Coefficient

1

0.6-1.2

0.7

< 1.5

2

0.8-1.6

0.9

< 1.4

3

0.8-1.8

0.9

< 1.5

4

1.0-2.0

1.0

< 1.5

5

1.2-2.5

1.3

< 1.5

6

1.4-2.5

1.6

< 1.4

7

2.5-5.0

2.6

< 1.5

87

5.0-10.0

85% of size range


9

10.0-20.0

——


10

20.0-40.0

——


11

40.0-80.0

——


Bulk density( kg/m³):

850+/-20

Special gravity(g/cm3):

1.4-1.6

Mohs Hardness:

3-4

Break Rate:

< 0.7%

Wear Rate:

< 0.5%

Acid Solubility:

< 3.5%

Chemical specification

Fixed carbon:

>85%

Ash content:

11±2 %

Volatile matter:

6-7 %

Total sulfur:

< 1 %

Moisture:

< 3 %

Advantage

1. Longer Filter Runs

2. Faster Filtration

3. Long Life

4. Good Separation Characteristics

5. Savings in wash water and power

6. Removes more iron and manganese salts


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