What is the way to see the quality of coal? How to identify the quality of coal?

1. When coal is mined or sold, it is difficult to distinguish the quality of coal. Therefore, when selling coal, it is generally necessary to take certain measures and equipment to check the quality of coal.

2. The specific performance of inferior coal Coal users are most worried about buying inferior coal, and the most common phenomenon in the market is to participate in coal gangue, coal skin soil, etc., these adulterants are the same black as coal, and it is usually difficult to distinguish with the naked eye; Or mix inferior coal with high-quality coal, which is shoddy.

3. Inferior coal generally cannot be burned or is not prosperous, and there are defects such as low heat, difficult ignition, and easy to extinguish; And there is also a peculiar smell, smelly, cheap, in the purchase of coal must not be greedy for a small cheap, choose a regular manufacturer to buy.

Look what coal! If it is bituminous coal: bituminous coal is generally lighter, and it burns with a lot of smoke and fierce fire!

Ordinary families generally don't use it! There is also a lump of coal, the flame of the coal is small, but the burning time is long! This coal is generally shiny!

One weighs two, looks at three tests.

One is to weigh the weight, the best coal is generally lighter, 100 kg of high-quality briquettes is about 140 pieces, and the inferior 100 kg is about 110 pieces at most.

The second is to look at the appearance, the appearance of the coal is black and bright, but it is not very smooth, and the smooth appearance is that the soil is mixed too much.

The third is to try to burn when buying briquettes, take a piece of briquettes and put them on the stove, good briquettes will soon be lit, and what you can't light is inferior honeycomb coal.

It is not very difficult to distinguish the advantages and disadvantages of coal, although it is black from the color, but the black is different, and the general high-quality coal black is shiny and pure; Inferior coal is dirty, yellow, and red. The high-quality is light, the inferior is heavy, and it can also be identified by coal test burning.

The specific performance of inferior coal: the most common adulteration phenomenon in the market at present is the mixing of coal gangue and coal skin soil in coal, which are black like coal, and it is usually difficult to distinguish with the naked eye; Or mix inferior coal with high-quality coal, which is shoddy. Inferior coal generally cannot be burned or is not prosperous, and there are defects such as low heat, difficult ignition, and easy to extinguish; And there is also a peculiar smell, smelly, cheap, in the purchase of coal must not be greedy for a small bargain, to choose a regular point of sale to buy.

The best way to test the quality of coal is to send coal samples to a qualified quality inspection unit for inspection, use coal testing equipment such as calorimeters, test the various process properties of coal, and judge the quality of coal with accurate experimental data results, which is the so-called coal quality testing. When coal is mined or sold, it is difficult to discern the quality of the coal. Therefore, when selling coal, it is generally necessary to take certain measures and equipment to inspect the quality of coal, but the testing cost is expensive, and it generally takes 7 working days to get the results at the earliest, which is not something that everyone can do.

1. Color. It refers to the natural color of the surface of fresh coal, which is the result of the absorption of light waves of different wavelengths by coal. It is brownish-black in color, and generally deepens gradually with the increase of coalification.

2. Luster. It refers to the reflective ability of the surface of coal under ordinary light. It is generally asphalt, glass, and diamond luster. The higher the degree of coalification, the stronger the luster; The higher the mineral content, the darker the luster; The deeper the degree of wind and oxidation, the darker the luster will become, until it disappears completely.

3. Pink. It refers to the color of grinding coal into powder or the traces left by coal when it is carved on a glazed porcelain plate, so it is also called streak color. Light brown to black in color. Generally, the higher the degree of coalification, the darker the pink.

Summary. 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.

1. The method of distinguishing the advantages and disadvantages of coal is not very difficult, although it is black from the color and luster, but the black is different, and the general high-quality coal black is shiny and pure; Inferior coal is noisy, dirty, yellow, and red. The high-quality light is heavy, and the low-quality is heavy, and the coal test burning can also be used to identify the lifting wheel.

2. The main combustion substance of coal is fixed carbon, and the volatile matter is a flammable gas, and the higher the degree of coalification, the greater the proportion of fixed carbon, and the less volatile matter. When the water is burned, it is necessary to evaporate and absorb the heat emitted by the coal. Therefore, the more fixed carbon hail per unit mass of coal, the more calorific value it emits.

The more volatiles, the lower the ignition point and the more flammable. The more ash, the more ash in the end. The more moisture, the less heat the coal uses relative after combustion.