What is the process of formation of coal? The process of formation of coal

The formation process of coal is shown below. First, coal is indeed the remains of plants through a systematic evolution of the formation, this is the truth of bumps and unbreakable, as long as you carefully observe the coal, you can see the traces of plant leaves and rhizomes; If you cut the coal into thin slices and look at it under a microscope, you can find very clear plant tissues and structures, and sometimes there are things like tree trunks preserved in the coal seams, and in some cases there are complete insect fossils wrapped in the coal seams.

2. Under normal temperature and pressure on the surface, the plant remains accumulated in stagnant water bodies are transformed into peat or saprolite through peatization or saprolite; After peat or saprolite, it sinks to the depths of the underground due to the decline of the basin basement, and is transformed into lignite by diagenesis. When the temperature and pressure gradually increase, it is transformed into bituminous coal to anthracite through metamorphism.

3. Peatification refers to the biochemical changes in the accumulation of higher plant remains in swamps.

The process of transformation into peat. Sludge is the process by which the remains of lower organisms are transformed into sludge through biochemical changes in swamps. Saprolite is a silt-like substance rich in water and asphaltene. Glacial processes may contribute to the collection and preservation of coal-forming plant remains.

Coal is a solid combustible mineral that was gradually formed by ancient plants buried in the ground and undergoing complex biochemical and physicochemical changes, a solid combustible organic rock, which is mainly formed by biochemical action of plant remains, and then transformed by geological action after burial.

Coal is a mineral that can be used as a fuel or as an industrial feedstock. It is a black solid mineral composed of carbon, hydrogen, oxygen, nitrogen and other elements that have changed their physical and chemical properties through biochemical and geological processes of ancient plants. Coal is also a source of organic compounds.

Various aromatic hydrocarbons can be obtained by fractionation of coal tar; Through the direct or indirect liquefaction of coal, fuel oil and a variety of chemical raw materials can be obtained.

Precautions for the use of coal.

The general household coal heating stove has not stepped out of the traditional furnace combustion mechanism, due to insufficient combustion, the exhaust gas emission during combustion is large, relatively coal-consuming, and it is also easy to cause gas poisoning, threatening the user's own life safety. Excessive exhaust emissions also cause serious environmental pollution.

The most advanced coal-fired boiler uses the advanced combustion principle of large boilers, which can realize bituminous coal combustion without black smoke emissions, and at the same time has high thermal efficiency, saves energy, protects the environment, and truly realizes high efficiency, energy saving and low emission. The products are made of better steel pipes and steel plates, and the furnace is made of better refractory materials, which are burn-resistant and fast heat transfer, and have a long service life.

The process of formation of coal is as follows:

Coal is a sedimentary organic mineral converted into plant remains through biochemical and physicochemical reactions, and is a mixture of a variety of polymer compounds and minerals. Coal was formed slowly by burying a large number of plants in the ground hundreds of millions of years ago.

Coal is a product of the movement of the earth's crust. In the Paleozoic Era more than 300 million years ago, the Mesozoic Era more than 100 million years ago and the Cenozoic Era tens of millions of years ago, a large number of plant debris were transformed into coal after complex biochemical, geochemical and physicochemical processes.

It is generally believed that the coal-forming process is divided into two stages: the peat stage and the coalification stage. The former is mainly a biochemical process, and the latter is a physicochemical process.

Peat Stage: The first stage of peat is the continuous reproduction of plants in peat bogs, lakes or shallow seas, and their remains are constantly decomposed, combined and accumulated with the participation of microorganisms, and biogeochemistry plays a dominant role in this stage. The lower plants form saprolite through biogeochemical processes, and the higher plants form peat, so the first stage of coal formation can be called the saprolite stage or the peat stage.

Coalification stage The coalification stage consists of two continuous processes: the first process, under the action of geothermal heat and pressure, the peat layer undergoes various changes such as compaction, water loss, limb aging, and induration to become lignite. The density of lignite is greater than that of peat, and there is also a significant change in composition, with a relative increase in carbon content, a decrease in humic acid content, and a decrease in oxygen content.

Because coal is an organic rock, this process is also called diagenesis.

Coal is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus and other elements, the sum of carbon, hydrogen and oxygen accounts for more than 95% of organic matter, which is a very important energy source, and is also an important raw material for metallurgy and chemical industry.

It is a solid flammable mineral that was gradually formed by ancient plants buried in the ground and undergoing complex biochemical and physicochemical changes.

It is a solid combustible organic rock, which is mainly formed by biochemical action of plant remains, buried and then transformed by geological action, commonly known as coal.

At room temperature and pressure on the surface, it is transformed into peat or saprolite by peatization or saprolite from plant remains accumulated in stagnant water bodies. After peat or saprolite, it sinks to the depths of the underground due to the decline of the basin basement, and is transformed into lignite by diagenesis. When the temperature and pressure gradually increase, it is transformed into bituminous coal to anthracite through metamorphism. Peat is the process by which the remains of higher plants accumulate in swamps and are transformed into peat through biochemical changes.

Coal and oil are more like the result of the movement of the earth's crust, and the fossils of animals and plants in them are more like animals and plants wrapped in amber, otherwise how many plants and animals would be needed to form such a thick coal layer.

When the plants die, they fall into the swamp, where bacteria multiply on the withered plants, and the decaying plants are covered with mud and clay, and many plants continue to grow, die, and decay. After a long period of time and crustal changes, under high temperature and high pressure, these sediments lose most of their water, and their composition gradually changes to coal.

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.

Coal 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.

The thickness of the coal seam in a coal mine is related to the rate of crustal decline and the amount of plant remains accumulated in the area. The earth's crust is falling fast, and the plant remains are piled up thickly, and the coal seam of this coal mine is thick, and conversely, the crust is about to fall slowly, and the plant remains are piled up thin, and the coal seam of this coal mine is thin.