What are the different types of coal? What are the types of coal

Coal is divided into two categories: coking coal and non-coking coal.

In the long process of geological evolution, coalfields are affected by a variety of geological factors. Due to the differences in the age of coal, the original material of coal, the degree of reduction and the type of genesis, coupled with the coexistence of various metamorphisms, the diversification of coal varieties in China has been achieved. According to the classification of coal types in China, coking coal accounted for 27 65%, non-coking coal accounted for 72 35%, the former includes gas coal (13 75%), fertile coal (3 53%), main coking coal (5 81%), lean coal (4 01%), and other ungraded coal (0 55%); The latter include anthracite (10,93 per cent), lean coal (5,55 per cent), weakly sticky coal (1,74 per cent), non-sticky coal (13,8 per cent), long-flame coal (12,52 per cent), lignite (12,76 per cent), natural coke (0,19 per cent), ungraded coal (13,80 per cent) and unclear coal (1,06 per cent).

China's coal classification divides all coal into lignite, bituminous coal and anthracite according to the volatile content of coal.

How did coal come about?

In the 4.3 billion years of the earth's age, there are only two major coal-forming periods, one is the Carboniferous period and the other is the Jurist. Most of the coal seams we are mining now are formed in the Juristic system, and the Juristic Xishan Kiln Formation coal measure that exists under the ground of Urumqi is a fairly high-quality coal measure, which produces weakly bonded coal for boiler heating and power thermopower. We human beings rely on scientific tools to find all kinds of coal seams buried deep in the ground, including upright, sloping, horizontal, thin, medium-thick, thick, extra-thick and so on.

We use one of humanity's greatest engineering techniques, mining engineering, to tap into the gifts that the universe has been bestowed upon us by nature.

Lean coal, fertile coal, anthracite, coking coal, weakly bonded coal, gas coal, lignite, long-flame coal, lean coal.

1. Coking coal: Coking coal is the main coking coal among coking coals, with a medium degree of metamorphism, and the best coking and cohesiveness. The coke produced by Shanxi's coking coal has large lump, less cracks, high crushing strength and good wear resistance, which is a treasure of coking coal.

Coking coal, tar and coke oven gas can be obtained. In addition to smelting, coke can also be used to produce gas and calcium carbide.

2. Fertile coal: Fertile coal is a kind of coking coal, and the coke made with fertile coal has many transverse cracks, and the coke root is more coke, which is fragile, but the cohesion of fertile coal is very strong, and it can be matched with coal with weak cohesion to make high-quality coal, which is called the mother of coking coal. Due to the scarcity of the fertile coal varieties, accounting for only 5% of the country's proven coal resources, while the proven reserves of Shanxi coal account for about 50% of the country's total, and the main branches are in Huoxian mining area, Sanjiao mining area and Gujiao mining area.

3. Anthracite: Anthracite is a highly metamorphic coal with the characteristics of hard and strong luster. The burning time is long and the fire power is high.

Anthracite is mainly used in fertilizer and chemical production. Yangquan anthracite is an ideal fuel for blast furnace injection because it can be grinded. The anthracite coal in Jincheng and Yangcheng is known as orchid charcoal, which is famous at home and abroad.

Shanxi's anthracite resources have large reserves, ranking first in the country.

4. Lean coal: Lean coal is the coal blend among coking coals, and its performance is similar to that of coking coal. Lean coal coke has large lump degree and few cracks, but poor meltability and wear resistance, and its use is not only for coking coal blending, but also for gas production, power generation and other power coal.

Shanxi Qinshui Coalfield, Xishan Coalfield, Huoxian Coalfield and Hedong Coalfield all contain rich lean coal resources.

5. Weakly bonded coal: Weakly bonded coal is an excessive type of coal between coking coal and non-coking coal, which is mainly used for gas production, fuel and coking. Shanxi Datong mining area is rich in low-sulfur, low-ash and low-phosphorus weakly bonded coal, and is the largest high-quality thermal coal base in China.

The types of coal can be divided into lignite, bituminous coal, and anthracite.

Lignite: also known as firewood coal, it is the mineral coal with the lowest degree of coalification. A brownish-black, matte low-grade coal between peat and bituminous coal. It is chemically reactive, easy to weathered in the air, not easy to store and transport, and seriously pollutes the air when burned.

Lignite. Bituminous coal: Bituminous coal is a type of coal, which is the product of further deterioration of coal, and the degree of coalification is moderate.

Carbon content 80% 90%, hydrogen content 4% 6%, oxygen content 10% 15%. According to the volatile content, the thickness of the colloidal layer or the process properties, it can be divided into long-flame coal, gas coal, fertile coal, coking coal, lean coal and lean coal. Black, dyed hands, dense and brittle, streaks are black, and smoke emits when burning, so it is called bituminous coal.

Bituminous coal. Anthracite: Anthracite is a hard, dense and high-gloss coal mine. Of all coal varieties, anthracite has the highest carbon content and the least impurity content, despite its lower calorific value.

Anthracite.

Under the microscope, coal is mottled in color, ranging from a dazzling gold to a chilly blues or gun-gray. Coal is not what it seems. Black or brown coal is often compared to black gold, generally referring to the long and limited amount of coal that goes from plants to peat and back to coal.

Coal is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus, and the sum of carbon, hydrogen and oxygen accounts for more than 95% of organic matter.

Coal is a very important energy source, and it is also an important raw material for the metallurgical and chemical industries. Coal is a solid flammable mineral that was gradually formed by ancient plants buried in the ground and undergoing complex biochemical and physicochemical changes.

Clay minerals are the most abundant mineral impurities in coal, accounting for about 60% to 80% of the total mineral impurities in coal. The common clay minerals are mainly kaolinite and illite, while montmorillonite and illite-montmorillonite mixed minerals are few, and clay minerals in coal usually exist in two forms, one is in a crystalline state, such as kaolinite, and the other is amorphous particles, filling the cavity or scattered in the matrix, sometimes gathering into bands, lenses, clumps or irregularities.

According to the industrial use of coal, the classification of process properties and quality requirements, also known as the industrial classification of coal, the same type of coal has similar characteristics, and the properties of different types of coal are significantly different, in order to rationally and comprehensively utilize coal resources, coal needs to be divided into different categories and grades. Different types and grades of coal have different uses, and the ideal classification method should have both sufficient scientific basis and practical significance.

China's coal can be divided into three categories: lignite, bituminous coal, anthracite; 17 sub-categories: anthracite, lean coal, lean coal, lean coal, coking coal, fertile coal, 1 3 coking coal, gas fertilizer coal, gas coal, 1 2 medium sticky coal, weak sticky coal, non-sticky coal, long-flame coal, lignite.

Bituminous coal can be divided into coking bituminous coal and general bituminous coal, the washed coal of coking bituminous coal is mainly used for coking, the coal with good coking or cohesiveness is high-quality coking coal, and the general bituminous coal is mainly used as thermal coal or gasification coal, and their washed coal can be used as coal for blast furnace injection.

Anthracite lump coal with good thermal stability is the main raw material for synthetic ammonia plant, coal with high volatile matter and calorific value is a better power coal, and some young coal with low ash and low sulfur is a better raw material for pressurized gasification to produce gas and hydroliquefaction to produce artificial liquid fuel.

Coal is a widely used fossil fuel that is formed by the deposit, accumulation and metamorphism of plants over millions to hundreds of millions of years.

Depending on its nature and origin, coal can be divided into many different types. Here are the common types of coal and their characteristics:

1. Anthracite coal: Bituminous coal is the hardest, densest, and very little moisture and ash. It burns for a long time and is not easy to extinguish. Bituminous coal is commonly used in fields such as steelmaking, power generation, and heating.

2. Bituminous coal: Bituminous coal is black or brown coal, with a moisture content of about 10-20% and an ash content of about 5-20%. It has strong combustion performance, high calorific value, and will produce relatively large smoke after combustion.

Thermal coal is widely used in industrial production and heating.

3. Lignite coal: Lignite coal is a type of coal with a high water content, usually with a moisture content of more than 20%. It has a higher ash content, a lower calorific value, and more smoke and dust when burned. Lignite is commonly used in fields such as power generation and heating.

4. Coal slurry: Coal slurry is a kind of coal slurry containing a lot of water, and its coal quality is characterized by low ash content and high volatile content. It is mainly used in industrial production and cogeneration and other fields.

In addition to the above-mentioned common coal types, there are also some coal types with special purposes, such as anthracite, semi-coking coal, kerosene and coke. Each of these coal types has its own characteristics and application scenarios, providing people with an energy option for enriching their limbs and cherry blossoms.

Coal is mainly divided into coking coal and non-coking coal, the former includes gas coal, fertile coal, main coking coal, lean coal, etc., and the latter includes anthracite, lean coal, weak sticky coal, non-sticky coal, long-flame coal, lignite, natural coke, etc., the types of coal can be divided from the degree of coalification, process performance indicators, properties, and uses.

Coal is a solid combustible organic rock, mainly composed of carbon, pure cavity hydrogen, oxygen, nitrogen, sulfur, phosphorus and other elements, which is a very important energy source and an important raw material for metallurgical and chemical industries.

According to the degree of coalification and process performance indicators, coal can be divided into secondary smoke balance medium coal, hard coal, gas fertilizer coal, coking coal, lean coal, weathered coal, 1 2 medium sticky coal, 1 3 coking coal and other types.

Coal can be divided into anthracite, bituminous coal and lignite according to the dry ash-free base volatile content and other indicators, among which anthracite and lignite can be divided into several subcategories according to the degree of coalification and the characteristics of industrial utilization.