Is slime coal ash and what is fly ash?

Coal slime is the sediment of black coal water after the raw coal has been washed, which is flammable; Coal ash, on the other hand, is a powder left behind by coal burned in thermal power plants, and is not flammable.

Summary. Hello, the difference between cement coal and thermal coal 1There are many types of coal, and there are different divisions according to different standards.

But the difference said will certainly be the same. 2.Coal has a wide range of uses and can be summarized into three main uses according to the purpose for which it is used:

1) thermal coal, (2) coking coal, (3) coal for coal chemical industry, mainly including coal for gasification, coal for low-temperature dry distillation, coal for hydrogenation and liquefaction, etc.

You are resistant to pants well, the difference between cement coal and thermal coal 1There are many types of coal, and there are different divisions according to different standards. But the difference said will certainly be the same.

2.Coal has a wide range of uses, which can be summarized into three main uses according to its purpose: (1) thermal coal, (2) coking coal, (3) coal for coal chemical industry, mainly including coal for gasification of mu stove, coal for low-temperature dry distillation, coal for hydrogenation liquefaction, etc.

Specifically, the coal is ground into powder and burned in the boiler of the thermal power plant, and the water in the boiler absorbs heat and turns into steam with certain parameters to drive the steam turbine to rotate, and the steam turbine drives the generator to generate electricity, which is used for power generation, so it is called thermal coal. 2.Quality requirements for coal used for power generation.

The pulverized coal furnace of the power plant has a wide range of applications for coal types, and it can be designed to be used for lignite with high volatile content, or it can be designed to be used for anthracite with low volatile cavity and careful closure. However, it is not possible to burn all kinds of volatile coal in an installed boiler, because it is limited by the type of jet flame cracker and the furnace structure.

The ash from the coal is grayish-white.

The ash is white when the coal is completely burned, but in most cases it is incomplete, so it is difficult to see the white ash.

If the quality of the coal is very poor, there will be gangue that turns gray after burning, and if the temperature is too high, lumpy coke slag will appear.

Now there are fewer raw coal that are burned directly, and the loess is used as a binder, and it is yellow-red ash or ash powder after burning.

The ash burned out of the coal block is gray-white powder ash, and if the quality of the coal is poor, there will be gray coal gangue after burning; If the temperature is too high (coal moisture is high, add to the blower) lumpy coke slag will appear. Now there is less raw coal burned directly, mixed with loess as a binder, and burned into yellow-red ash blocks, or ash powder.

Gray-white, more than half of China's energy supply is provided by coal, which is extremely abundant in storage, and many northern provinces still use coal for heating in winter today. So everyone is familiar with this swarthy coal. If you say what it will be like when the coal is burned, everyone will definitely think of a pile of ashes.

But in China's Xinjiang, a colorful mountain has been burned.

Located in Baicheng County, Aksu City, Xinjiang's Wucai Mountain is famous for its five colors, but it is not only brilliant. There is also a beautiful legend, when the Tang monk and apprentice four people passed here, they couldn't get by, two beautiful fairies accompanied by beautiful colors helped them cross the mountain, and then Tang Seng fell in love with this beauty, and Sun Wukong left the colorful sunset here. 

The slag formed by the combustion of coal is called "coal ash". Coal ash is a black powder formed after coal combustion, which can be used as fertilizer, the main components are Si02, Al2O3, Fe3O4, FeO, and a small amount of CAO, MGO, etc., the main use is urban landfill; coal ash dam treatment; road, railway, drainage engineering; water conservancy, tunnels, embankments, dams, and gates to prevent seepage; anti-seepage of liquid storage; Water conveyance, infusion channels, solid waste stacking impermeability; Roof leakage; The basement of the building, the underground warehouse, and the underground garage are moisture-proof; Pile membrane cofferdam, sea land reclamation, wharf engineering, etc. Coal ash has adsorption, purification, catalysis and other functions, so coal ash can be used in the laboratory instead of many drugs for various experiments, in daily life can be used for life-saving, purification of sewage, production can be used as fertilizer and improve acidic soil, in environmental protection can be used to treat industrial wastewater and so on.

Fly ash: It is the fine ash collected from the flue gas after coal combustion, and fly ash is the main solid waste discharged from coal-fired power plants.

The main oxide composition of fly ash in thermal power plants in China is: SIO, alumina, FEO, ferric oxide, CAO, titanium dioxide, etc. With the development of the power industry, the emission of fly ash from coal-fired power plants has increased year by year, and it has become one of the industrial waste residues with large emissions in China.

If a large amount of fly ash is not treated, it will produce dust and pollute the atmosphere; If discharged into the water system, the river will be silted up, and the toxic chemicals in it can also cause harm to humans and organisms. However, fly ash can be recycled, such as as as admixture for concrete.

Fly ash resembles cement in appearance, and the color varies from creamy white to grayish-black. The color of fly ash is an important quality indicator that reflects the amount and difference of carbon content. To a certain extent, it can also reflect the fineness of fly ash, the darker the color, the finer the particle size of fly ash, and the higher the carbon content.

Fly ash is the fine ash in the flue gas produced by the combustion of coal. Usually refers to the fine ash collected from the flue gas of coal-fired thermal power plants.

Fly ash is a small sphere formed by coal entering the furnace of 1300 1500, under the condition of suspension combustion, heated and then cooled, with a smooth surface and fine pores. Its main components are silicon dioxide, aluminum oxide, iron oxide, calcium oxide, magnesium oxide, sulfur trioxide, etc.

The emission of fly ash is related to the ash content of the coal burned, and the higher the ash content, the greater the emissions. A large amount of fly ash is not treated, which will produce dust and pollute the atmosphere. Direct discharge into the water system will silt up rivers and lakes, cause pollution to water bodies, damage aquatic ecosystems, affect the aquaculture industry, and the harmful components in it also have adverse effects on human health.

1. Add water to pre-wet the grass that is crushed into small sections, and the water content should reach 70% and add 2% grass ash. 2. In the whole process of piling, do not use shovels to pile or step on materials, so as not to cause poor ventilation. 3. The top of the pile is flat, not turtle-back or mountain-shaped, and the pile is built with a wooden stick to pierce holes in the pile.

4. First tie two rows of vents on the top of the pile to the bottom of the pile, and then tie two rows on the side of the pile. Peat, also known as "peat", also known as "peat", was formed in the Quaternary period, and was formed by the remains of swamp plants, which could not be completely decomposed and accumulated under the condition of being cautious under the condition of many water and wide acres. Contains a lot of water and plant residues that have not been completely decomposed, humus and some minerals.

Grass peat, the coal with the lowest degree of coalification tolerance (the most primitive state of coal), is an organic matter.

Summary. Soil and water together are called mud, and the slime is simply called pulverized coal and water together, which is a popular way to understand. Coal slime generally refers to the semi-solid formed by the water content of pulverized coal, which is a product in the coal production process.

In the process of coal mining and coal washing, slime will be produced, but the quality of the slime is different.

Soil and water together are called mud, and the slime is simply called slime when pulverized coal and water cover the town together, which is a popular way of understanding. Coal slime generally refers to the semi-solid formed by the water content of pulverized coal, which is a product in the coal production process. In the coal mining process, slime will be produced in the shirt and in the rough process of washing coal, but the quality of the slime is different.

Therefore, after the wet pulverized coal is stirred, it is a slime, and the wet coal block is not a slime.