Anthracite suppliers of gas, flaming and steam coal.
Welcome to the National Trading Company (NTC).
We first entered the market of fuel energy in Ukraine in 2005, and since then, more than 10 years we successfully developing, expanding and creating its new branches throughout the country. Our main feature is the presence of our own mines and coal mining, so this is the way our company can control its production at all stages. Here you can buy anthracite, flaming coal, fuel briquettes in the best quality and at the most affordable price.
So if you are looking for where to buy fuel, you can always count on our services.
Our direction is produce of fuel, steam coal and briquettes for sale. So what is hard coal energy? Types and marks of anthracite.
Selection of fuel for the production process
The minerals requirement exists in various industries. Properties and quality characteristics of this product vary widely. This happens even if the carbon has the same marking. The fact is that the characteristics of the fossil depend on the place of its extraction. That is why every company should be acquainted with its physical characteristics, choosing fuel for its production.
Coal is distinguished by the following properties:
This is one of the most important characteristics, which ranges from 1.28 to 1.53 grams per ccm.
Calorific value of char increases with increasing hardness.
This indicator is between 75 and 97 percent. Its capacity for impurities remains less with a larger content of carbon in the fuel. This allows you to get the maximum quantum of energy during the product combustion.
This characteristic determines the ability of the fossil to undergo transportation.
This parameter is in the range from 40 kilograms per square centimeter (for brown hard fuel) to 300 (for anthracites).
In char, it can be from 0.5 to 5.4 percent. The value of its magnitude makes it possible to use the fuel more safely. The volatiles yield (2-45%).
Fuel can contain between 4 and 15 percent moisture. This indicator directly determines whether fuel is effective in process of burning. The properties of a moister product are radically different from dry. Such carbon crumbles and undergoes rapid weathering.
This characteristic indicates the amount of noncombustible mixtures that are contained in the fossil. The heat capacity increases with less ash content. Anthracites have the lowest percentage of incombustible mixtures. It is within the ambit of 2%. Ash content within the limits of 30% acceptable for heating. 45% is the highest value of this characteristic.
This indicator is in the range from 6500 to 8600 kcal / kg. It characterizes the feck of heat that is generated when one kilogram of fuel is burned.
Different carbon stone can be purchased depending on the purpose of use. The properties of the fuel become clear at the same time, based on the degree of enrichment.
Such degrees are allocated
1. Concentrates. Such fuel is used to produce electricity and heat.
2. Industrial products. They are used in metallurgy.
3. Duff. This is a fine fraction of charcoal (up to six millimeters), as well as dust result from the crushing of the rock. Briquettes are formed by using a duff, which have good operational properties for household solid fuel boilers.
There is a differentiation in this indicator:
Its properties are somewhat worse. It produces a low heat during combustion and crumbles during transportation. In addition, it has a tendency to burn itself.
2. Hard coal.
This type of fuel has a large number of varieties (marks), with different properties. It is widely used in power engineering and metallurgy, Housing and Public Utilities and in the chemical industry.
It is the most qualitative type of hard fuel. The properties of all these forms of mineral are significantly different from each other. So, lignite is characterized by the lowest heat of combustion, and anthracites with the highest.
It is important to know the size of char when choosing it. This indicator is encrypted in the mineral mark. So, the factions are divided:
- "P" - plate, which is a large piece of more than 10 cm
- "F" - fist, which size is from 5 to 10 cm.
- "N" is a nut, it is also quite large, with sizes of fragments from 2.5 to 5 cm.
- "F" - fine, with small pieces of 1.3-2.5 cm.
- "S" - a seed - a cheap fraction for prolonged decay with dimensions of 0.6-1.3 cm.
- "D" - a duff, it is ebmer dust, intended for briquetting.
Properties of Anthracite
This fuel is higher quality. It is a rock that has a black color and a matte, semi-matt or glossy surface. Only five to six percent of moisture is contained in this type of fuel, because of what it has a high calorific value. Anthracite provides 3.5 times more heat compared to oak, alder and birch firewood. The only downside of this type of fuel is its large ash content.
If it`s long term use, it must be placed in a special shed or bunker. There, it must be protected from precipitation and direct sunlight. If the heaps of ember are large, then it is necessary to constantly monitor their condition during storage.