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Anonymous users2024-02-06Thermal coal, moderate temperature, full combustion, durable.
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Anonymous users2024-02-05<>1. The essence is different: coal is a combustible sedimentary rock. There are two types of charcoal: charcoal and coke.
2. Different ways of formation: coal is the product of physical and chemical changes such as high temperature and metamorphism that animals and plants in ancient times were buried in the ground for a long time. Charcoal is a black solid made by burning a material in isolation from the air.
3. Different characteristics: coal has a certain luster, contains mineral oil, etc., and is a crystal with a relatively compact structure. Carbon maintains the original structure of wood, has a developed pore structure and strong adsorption capacity, and is a commonly used adsorbent and catalyst carrier.
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Anonymous users2024-02-04Summary. It is divided according to the composition. The composition of coal is related to the depth of burial and rock formation. So the number and number of coal are generally different rock formations.
1. "Thermal coal" and "metallurgical coal" have basically covered all 3 categories and 17 types of coal.
2. The coal type is the same, the origin is different, and the appearance is very different.
3. There is no god who can judge the calorific value or other quality by showing him a coal sample, because the world is too big.
4. People who can judge the quality according to their appearance are generally limited to the judgment of coal produced from certain origins or mines that they are familiar with.
What kind of coal is the best.
So the number and number of coal are generally different rock formations. 1. "Thermal coal" and "metallurgical coal" have basically covered all 3 categories and 17 types of coal. 2. The coal type is the same, the origin is different, and the appearance is very different.
3. There is no god who can judge the calorific value or other quality by showing him a coal sample, because the world is too big. 4. People who can judge the quality according to their appearance are generally limited to the judgment of coal produced from certain origins or mines that they are familiar with.
5. If you have to make a rough judgment, you should look at the number of stones, the amount of coal gangue, and the amount of moisture on the premise of knowing the name of the coal type. I don't know the name of the coal type, and the moisture judgment is not necessarily accurate - dusty coal may have dozens of moisture, and wet coal may only have a few moisture.
Lignite Bituminous Coal Anthracite Which of them is the best.
Anthracite is the best, environmentally friendly and clean.
Good. Thank you.
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Anonymous users2024-02-03Coal is a layer of extremely thick black humus accumulated on the ground by the branches and roots of plants for millions of years, which is continuously buried in the ground due to changes in the earth's crust, isolated from the air for a long time, and under high temperature and high pressure, after a series of complex physical and chemical changes and other factors, the formation of black combustible sedimentary rock, which is the formation process of coal.
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Anonymous users2024-02-02Appearance of coal: It is a black or brownish-black solid segment of a combustible mineral substance. Coal is a solid flammable mineral that was buried in the ground by ancient plants and gradually formed through complex biochemical and physicochemical changes.
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Anonymous users2024-02-01It's black, shiny and looks like a stone and lighter than a stone.
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Anonymous users2024-01-31Coal is a layer of extremely thick black humus accumulated on the ground by the branches and roots of plants for millions of years, which is continuously buried in the ground due to changes in the earth's crust, isolated from the air for a long time, and under high temperature and high pressure, after a series of complex physical and chemical changes and other factors, the formation of black combustible sedimentary rock, which is the formation process of coal.
See the encyclopedia for details.
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