What are the coal indicators and what are the coal indicators

Five commonly used indicators for coal:

The first indicator: moisture.

The moisture in coal is divided into intrinsic moisture, extrinsic moisture, crystalline water, and decomposition water.

The second indicator: ash content.

Refers to the residue left behind by coal after burning. Not the sum of the minerals in the coal, but the residues of these minerals after chemical and decomposition. A high ash content indicates that the combustible content of the coal is low. The calorific value is low. At the same time, in refined coal coking, the ash content determines the ash content of coke.

The third indicator: volatile matter (full name is volatile matter yield) v

It refers to the products of organic matter and some minerals in coal after heating and decomposition, not all of which are inherent components in coal, and some of them are pyrolysis products, so they are called volatile yield.

The fourth indicator: carbon sequestration.

Unlike carbon, which is analyzed as an element, it is calculated based on moisture, ash and volatile content.

The fifth indicator: total sulfur ST

It is a harmful element in coal, including organic sulfur and inorganic sulfur. Less than 1% can be used for fuel. Some areas require that in and below, environmental protection coal and green energy are often referred to as coal with low sulfur content.

Indicators on coal tm, im, fc

TM = Magnetic Tape Module.

im = induction motor.

fc =file compare file comparison China is the only big country in the world that uses coal as its basic energy source. Coal accounts for more than 75% of primary energy consumption.

The specific gravity of coal, also known as the density of coal, is the ratio of the weight of a certain volume of coal, excluding pores, to the weight of water at the same temperature and volume. The bulk density of coal, also known as the weight of coal or false specific gravity, is the ratio of the weight of a certain volume of coal, including pores, to the weight of water at the same temperature and volume. The bulk density of coal is an important indicator for calculating coal seam reserves.

The bulk density of lignite is generally, bituminous coal is, and anthracite has a large range of variations, which can be made by. The composition of coal and rock, the degree of coalification, and the composition and content of minerals in coal are the main factors affecting the specific gravity and bulk density. With the same mineral content, the specific gravity of coal increases with the deepening of coalification.

The indicators of coal are moisture and ash.

There are five commonly used indicators of volatile matter, fixed carbon and total sulfur ST. The moisture in coal is divided into internal moisture, external moisture, and crystalline water.

and decomposing water. Ash refers to the residue left behind by coal after combustion, not the sum of minerals in the coal, but the residue of these minerals after chemical and decomposition.

What are the coal indicators?

Volatile matter refers to the products of organic matter and some minerals in coal after heating and decomposition, not all of which are inherent components in coal, and some of them are pyrolysis products. Fixed carbon is calculated based on moisture, ash, and volatile.

Coal is an ancient plant buried in the ground and underwent complex biochemistry.

and solid flammable minerals gradually formed by physicochemical changes, known as black gold, it is one of the main energy sources used by the human world since the eighteenth century.

Coal is the most abundant and widely distributed fossil fuel on the planet.

The main elements that make up the organic matter of coal are carbon, hydrogen, oxygen, nitrogen and sulfur, in addition to very small amounts of phosphorus, fluorine, chlorine and arsenic.

The technological properties of coal are the basis for industrial evaluation of rational use of coal, mainly including cohesiveness, coking, and cokingCalorific value, chemical reactivity, thermal stability, tar yield and optionality, etc.

China's second largest coal producer, with coal resources of 100 million tons and recoverable and pre-recoverable reserves of 100 million tons, ranks third among the world's major coal listed companies, second only to Peabody and China Shenhua.

The company is also the largest coal equipment supplier, the largest coking coal production enterprise, and one of the largest coal service providers in China, with outstanding comprehensive advantages.

After the coal is crushed, it is selected againFeasibility analysis

After the crushing of medium coal, the cm3 density content is increased from , + cm3 density content from 086% increased to 86%, which is higher than before dissociation, indicating that a part of the gangue has been dissociated, and the refined coal and gangue are separated. The density grade contains Huiyan, which has a certain sorting value.

If the refined coal ash content is set at 10%, the refined coal yield at this time, and the separation density content is simultaneously, and the selectivity is more difficult to select. According to the calculation that 300t h of raw coal is selected in a single system, and the heavy medium coal accounts for about 6% of the total raw coal, theoretically the refined coal can be refined from the crushed medium coal per hour, and the annual refined coal is about 4500t.

Coal indicators include moisture, ash, volatile matter, fixed carbon, total sulfur ST, calorific value, maximum thickness of colloidal layer, etc. Moisture: The water in coal is divided into internal moisture, external moisture, crystalline water and decomposition water.

Ash: Refers to the residue left behind by coal after combustion. Not the sum of the minerals in the coal, but the residues of these minerals after chemical and decomposition.

The high ash content indicates that the combustible components in the coal are low, and the calorific value is low. At the same time, in the coking of refined coal, the ash content of the coke is determined by the high ash content. <

Coal indicators include moisture, ash, volatile matter, fixed carbon, total sulfur ST, calorific value, maximum thickness of colloidal layer, etc.

1. Moisture: The moisture in coal is divided into internal moisture, external moisture, crystalline water and decomposition water.

2. Ash: refers to the residue left by coal after combustion. Not the sum of the minerals in the coal, but the residues of these minerals after chemical and decomposition.

The high ash content indicates that the combustible components in the coal are low, and the calorific value is low. At the same time, in refined coal coking, the ash content determines the ash content of coke.

3. Volatile matter: refers to the products of organic matter and some minerals in coal after heating and decomposition, not all of which are inherent components in coal, and some of which are pyrolysis products, so it is called volatile yield.

4. Fixed carbon: Different from carbon in elemental analysis, it is calculated based on moisture, ash and volatile.

5. Total sulfur ST: It is a harmful element in coal, including organic sulfur and inorganic sulfur. Less than 1% can be used for fuel. In some areas, the answer is below and below.

6. Calorific value: Calorific value refers to the heat generated when the unit mass of coal is completely burned and burned, which is mainly divided into high calorific value and low calorific value.

7. The maximum thickness of the colloidal layer: after the bituminous coal is heated to a certain temperature, the maximum thickness of the colloidal layer formed is the maximum value of the difference between the upper and lower layers of the colloidal body measured by the probe in the determination of the colloidal layer index of bituminous coal.

Coal assay project.

Coal index assay:

Generally, the coal test indicators include: calorific value (calorific value), sulfur content (sulfur), ash, volatile matter, fixed carbon, coke slag characteristics, total moisture, analytical water and other indicators. If it is coking coal, it is also necessary to test the adhesion index (g value), colloidal layer (X value, Y value) and other indicators, and more indicators include the ash melting point (ash meltability), hydrocarbon, Hastelloy grinding index, coal ignition point, Oya expansion, coal activity, coal slag and other indicators.

The basic instruments required for these conventional indicators of coal testing are: calorimeter, sulfur meter, muffle furnace (high temperature furnace), microcomputer program controller or temperature controller, drying oven (oven), adhesion index tester, colloidal layer tester, ash melting point tester, etc., in addition to auxiliary equipment: crusher, sample preparation crusher, electronic balance, vibrating sieve machine, binary device, etc.

Main coking coal The specific indicators are as follows:

No.1 Coal Yard: Sulfur Content:

**Rate: 80

Ash: 12 Volatile parts: 30

Adhesion index: 70-80

No.2 Coal Yard: Sulfur Content:

**Rate ash.

Volatile Matter Adhesion Index:

Main coking coal quality requirements: ash

Flammable base volatiles.

Sulfur g-value 75

Y-value 16mm.

Main coking coal: ash % sulfur content

Volatile content %g value y value

Purpose: The main coking coal is mainly used for smelting iron and steel. ——According to the middle school geography textbook (compulsory 3), the difference between the main coking coal and 1 3 coking coal.

The biggest difference between the main coking coal and 1 3 coking coal is the volatile content, and the main coking coal is divided into volatile content 18-28 according to the national standard

1 3 volatile.

The g value of the main coking coal is generally between 65-75.

Y value 151 3g value between 60-70.

The y-value is basically unrequirementary.

Some areas produce the main coking coal.

With 1 3 coking coal g value to follow.

The indicators are also close, and the difference is not too big.

1. The calorific value of coal.

The calorific value of coal, also known as coal kcal, is the heat (calorific value, kcal) generated when coal is burned in the oxygen bomb, and the high calorific value, low calorific value and received base calorific value of coal are automatically calculated according to the input sulfur, hydrogen, total water and analytical water instruments.

2. Sulfur content.

Sulphur content is an important indicator to measure the environmental pollution of coal, and in 2004, the state stipulated that coal with excessive sulphur content is not allowed to enter urban areas.

3. Ash. Ash is a calcined residue or a residue after drying. But the ash must be the solid part of a substance and not the gas or liquid part. At high temperatures, a series of physical and chemical changes occur, and finally the organic components volatilize and escape.

Fixed carbon is one of the quality indicators for identifying coal or coke, etc. The mass of volatiles and ash is subtracted from the mass of dry coal. It is often expressed as a percentage of mass.

In the laboratory, about 1g of pulverized coal is usually placed in a standard crucible with a lid, heated at 900 for 7 minutes, and after the water and volatiles are expelled, the remaining mass is obtained by subtracting the ash.

gb5751-86

China's coal classification standards stipulate that coking coal is divided into two categories:

The dry ash-free volatile content of the first type of coking coal is VDAF=10% 28%, the adhesion index g>65, and the maximum thickness of the colloidal layer, Y 25mm.

The dry ash-free volatile content of the second type of coking coal is VDAF=20% 28%, and the cohesion index is g=50 65, and the coking property is worse than the former.

Coking coal (coking

coal), also known as metallurgical coal, is a kind of bituminous coal with medium and low volatile content with medium cohesiveness and strong cohesiveness. In China's national standard for coal classification, it is the name of bituminous coal with high degree of coalification and good coking. It is also known as main coking coal.

Worldwide, coking coal is a scarce resource and a valuable resource that must be protected, so coking coal is rarely used for coking alone. In China, typical types of Class I coking coal are Fengfeng No. 2 Mine in Hebei, Xiqu in Gujiao, Shanxi, Didao in Jixi, Heilongjiang, Zhangzhuang in Huaibei, Anhui Province, and Dabaoding Coal in Panzhihua, Sichuan. Typical types of coking coal in the second category are the iron works of Tonghua, Jilin Province and the Hetangou coal in Baotou, Inner Mongolia.

Benxi in northeast China, Tangshan, Jingcheng in Hebei and Xinwen in Shandong are all famous producers of coking coal.

There are five commonly used indicators of coal: moisture, ash, volatile, fixed carbon and total sulfur. The moisture in coal is divided into intrinsic moisture, extrinsic moisture, crystalline water, and decomposition water. Ash refers to the residue left behind by coal after combustion, not the sum of the total number of minerals in the coal, but the residue of these minerals after chemical and decomposition.

Volatile matter refers to the products of organic matter and some minerals in coal after heating and decomposition, not all of which are inherent components in coal, and some of them are pyrolysis products, so it is called volatile yield. Fixed carbon is calculated based on moisture, ash, and volatile.

Coal is a solid combustible mineral that was gradually formed by ancient plants buried in the ground and undergoing complex biochemical and physicochemical changes, known as black gold, and it is one of the main energy sources used by the human world since the eighteenth century.

Coal is the most abundant and widely distributed fossil fuel on the earth, and the main elements that make up the organic matter of coal are carbon, hydrogen, oxygen, nitrogen and sulfur, in addition, there are very small amounts of phosphorus, fluorine, chlorine and arsenic.