How can you tell a stone from a coal? What kind of stone is black like coal?

Coal adulteration makes the phenomenon of counterfeiting everywhere in the market, and the adulterated substances are mainly coal gangue.

Coal skin, soil, flue ash, because coal is black, doped things are also black, it is difficult to distinguish with the naked eye. In addition, problems such as the adulteration of inferior coal in high-quality coal and the adulteration of components in finished coal exist to varying degrees. For example, anthracite coal is mixed with coal gangue and stinky coal with sulfur; Powdered anthracite.

Bituminous coal is mixed with coal gangue powder or flue ash and coal skin soil; Finished coal such as honeycomb coal.

It is mixed with coal gangue powder, flue ash, coal skin soil, loess, etc. The main manifestations of inferior coal: first, it is not on or not prosperous, low in heat, difficult to ignite, and easy to extinguish. Second, it has a peculiar smell and smell.

Inferior coal is generally cheaper, such as anthracite lump coal, high-quality coal is generally about 400 yuan per ton, and the cheapest low-quality coal is 150 yuan; High-quality honeycomb coal is generally 400 yuan for 1 ton, while the lowest for low-quality coal is 250 yuan for 1 ton. Many consumers often fall into the trap of being cheaper and ignoring quality. It is best to buy from regular manufacturers, and most of the coal sold by coal sellers on the streets is of unreliable quality.

It is necessary to master the basic techniques of distinguishing between good and bad. In fact, it is not difficult to distinguish the advantages and disadvantages of coal, from the color point of view, although they are all black, but the black is different, the general high-quality coal is black and shiny, pure; Inferior dirtiness, yellowing, redness. The gangue mixed in anthracite coal is very easy to find, and the one that is not shiny and heavy is the gangue; Most of the coal with sulfur has yellow silk threads on it, which is easy to distinguish.

Honeycomb coal is inferior in earthy yellow or dark gray, and high-quality jet black and shiny. In terms of weight, it can be identified, the high-quality is light, and the inferior is heavy, for example, there are more than 1,400 pieces of high-quality honeycomb coal for 1 ton, while only 1,100 pieces of inferior coal.

The best way to distinguish the quality of coal is to test burn, no matter how fake it is, as long as it is burned.

My big project is going to be to take a little bit of fire, and the coal that can be lit is the coal, and the stone that can't be lit is the stone, or the coal is finished, and the rest is the stone.

1.Divided by medium weight. Stone heavy.

2.through hardness.

The colors are different. It's okay to open it up and take a look, but experience is important.

Experience will know the difference.

A stone as black as coal, no fading, no peculiar smell, no ignition point, non-magnetic, hard, smashed open inside all black, no impurities, what stone [Question] Wujin stone, also known as black lazuli, gold-clad stone, Chinese ink black, Mongolian black, black gallstone and black jade, Taiwan called volcanic rock, exported to foreign countries is known as "night rose".

In our hometown, it's called carbon, and it's used as fuel. The color is black; It's hard, it's hot, and when it burns, it's barely visible to the naked eye. Very little carbon dioxide is also produced.

Mainly used in rural areas. It can be used directly in the bedroom as a hearth. If it is well ventilated, it will not harm the human body.

Our hometown is called charcoal, which is used as fuel, the color is black, hard, and the fire is vigorous, and when burning, the smoke is almost invisible to the naked eye, and the carbon dioxide produced is very small. Mainly used in rural areas. It can be used directly in the bedroom to make a carbon stove.

Well-ventilated words have no effect on the human body.

Summary. The real and the fake can be distinguished by the following four points: 1. The weight is very light at first, and the density can be felt very small when you pick it up.

2. Scratch and then there is a little, take it on the paper or porcelain plate to scratch, it will leave a dark chocolate streak. If it is a copy of the product, it will only leave black or white streaks. The streak test is of identification significance for coal fines.

3. The structure can be seen on the coal essence similar to the original structure of wood. 4. Due to the different time of entering the soil and the pit mouth, most of the ancient coal essence will form a color and transition color, showing black gray, gray and white, olive and other pit colors. There are ancient coal fine ornaments with holes, and fine spiral patterns or use marks in the holes can be seen through high-powered magnification glasses.

Fellow, I really didn't understand, I can be more specific.

The true and false can be distinguished by the following four points: 1. The weight is very light at first, and it can be picked up late to feel that the density of the high limbs is very small. 2. Scratch and then there is a little, take it on the paper or porcelain plate to scratch, it will leave a dark chocolate streak.

If it is a copy of the product, it will only leave black or white streaks. The streak test is of identification significance for coal fines. 3. The structure can be seen on the coal essence similar to the original structure of wood.

4. Due to the different time of entering the soil and the pit mouth, most of the ancient coal essence will form a color and transition color, showing black gray, gray and white, olive and other pit colors. There are ancient coal fine ornaments with holes, and fine spiral patterns or use marks in the holes can be seen through high-powered magnification glasses.

Yes, coal is one of the rocks. Coal is a metamorphic rock that is transformed from sedimentary rocks. Because coal is a combustible black or brownish-black sedimentary rock, such sedimentary rocks usually occur in rock formations or veins known as coal beds or coal seams.

For a long time, the backfill coal mining technology has been in the extensive research and exploration stage. Due to the limited space and filling rate of the filling channel, the coal mining output is low and the filling cost is high. After filling, the control requirements cannot really be met, so the backfill mining has not reached large-scale industrial application before.

I can't tolerate that others won't make the same mistake again! It's so delicious! So if you say no, I'll give him a certain amount when I come.

Coal gangue is a kind of sedimentary rock, which was formed at the same time when the coal seam was formed, most of which are limestone, due to the long-term infiltration and diffusion of the coal seam, there is also a relatively low carbon content, and the color is black and gray. It is difficult to burn coal gangue alone, so it can be made into powder and combined with good coal for combustion and utilization in pulverized coal furnace, or it can be used as fuel in a specially designed boiling furnace. Fly ash can be used as a raw material for building materials.

Coal gangue can also be crushed and used in internal combustion bricks. Stone coal is a deposited combustible organic rock formed in the Early Proterozoic and Early Paleozoic. It is black or blackish-gray in color.

Most of them have the characteristics of high ash, high sulfur, low calorific value and high hardness. Stone coal is a highly metamorphic saprolite or algae coal. In addition to organic carbon, its components include silicon oxide, calcium oxide and a small amount of iron oxide, alumina and magnesium oxide.

There are various different classifications of stone coal. According to the ash content and calorific value, it can be divided into general stone coal and high-quality stone coal: the ash content of general stone coal is 40 90, and the calorific value is below kilojoules; The ash of high-quality stone coal is divided into 20 40 and the calorific value is kilojoules.

According to the structure and structure, it can be divided into lumpy stone coal, granular stone coal, flake stone coal and pulverized stone coal. According to the priority of mineral impurities in stone coal, it is divided into siliceous stone coal, calcareous stone coal, etc. Stone coal is widely distributed in China, and the Qinling region in the south is the most abundant.

Stone coal can be used as fuel, and the slag after combustion can be made into carbonized bricks, cement and other building materials, and vanadium, uranium, molybdenum, nickel, copper, cobalt and other metal elements can also be extracted from stone coal.

Coal is rock. Coal is sedimentary rock, mining will make the rock mass break section and create surface subsidence, the way to prevent subsidence, one is to support, mining reserved coal pillars, the other is filling. For a long time, the backfill coal mining technology has been in the extensive research and exploration stage.

Due to the limited space and filling rate of the filling channel, the coal mining output is low and the filling cost is high. After filling, the control requirements cannot really be met, so the backfill mining has not reached large-scale industrial application before.

Be. "Minerals] are the components of various rocks and ores inside and outside the earth's crust, and are natural homogeneous with certain chemical composition and physical properties. Most minerals are solids, but some are liquids (e.g., natural mercury, petroleum) or gases (e.g., CO2, H2S, etc.). ”

And on page 136 of the book, it is said that [the difference between rocks and minerals] rock is a solid composed of one or more minerals, but it does not possess the basic properties of minerals. The difference between rocks and minerals is like the difference between model airplanes and the materials from which they are made. Just as rocks are made up of minerals, aircraft models are made up of tires, wings, engines, and other components.

The basic characteristic of rocks is that all rocks are mixtures. "Coal, oil, and natural gas are combustible organic rocks, not minerals.

Hello! Buy black coal and burn rock five stones.