To buyers
To improve the quality of finished commercial products, the extracted coal passes the enrichment stage. In the process of enrichment, the ash content of coal decreases and its caloric content increases. In addition, the concentrate is divided into different grades by size, which allows JSC "Donugol" to supply products that fully meet the requirements of various consumers.
At the present stage, 100% of the company's coal is being enriched, which ensures high quality characteristics of all commercial products. The strategic task is to introduce and master the following technologies in the coming years: removal of physico-chemical bound moisture from anthracite (coal drying), enrichment of 0.2-1 mm class blocks, briquetting of a coal spike and other modern technologies that allow to obtain waste-free coal production
Quality indicators
Products after manual sampling
|
AK (50-100 ММ)
LARGE
|
Ash content for dry condition
no more than 10 %
Volatile substances
no more than 4 %
|
Moisture
no more than 5 %
Lowest heat of combustion
at least 7,200 kcal/kg
|
Total sulfur for dry condition
no more than 1 %
Trivia Content
no more than 15 %
|
Products after enrichment
|
АО (25-50 ММ)
NUT
|
Ash content for dry condition
no more than 6 %
Volatile substances
no more than 3.5 %
|
Moisture
no more than 6 %
Lowest heat of combustion
at least 7,200 kcal/kg
|
Total sulfur for dry condition
no more than 1 %
Trivia Content
no more than 12 %
|
|
АМ (13-25 ММ)
SMALL
|
Ash content for dry condition
no more than 5 %
Volatile substances
no more than 3.5 %
|
Moisture
no more than 6.5 %
Lowest heat of combustion
at least 7,200 kcal/kg
|
Total sulfur for dry condition
no more than 1 %
Trivia Content
no more than 17 %
|
|
АС (6-13 ММ)
SEED
|
Ash content for dry condition
no more than 4 %
Volatile substances
no more than 4 %
|
Moisture
no more than 8 %
Lowest heat of combustion
at least 7,200 kcal/kg
|
Total sulfur for dry condition
no more than 1 %
Trivia Content
no more than 18 %
|
|
АШ (1-6 ММ)
BAYONET
|
Ash content for dry condition
no more than 4 %
Volatile substances
no more than 3 %
|
Moisture
no more than 9.5 %
Lowest heat of combustion
at least 7,200 kcal/kg
|
Total sulfur for dry condition
no more than 1 %
|
Products after sieving
|
АШ (0.2-1 ММ)
BAYONET
|
Ash content for dry condition
no more than 30 %
Volatile substances
no more than 6 %
|
Moisture
no more than 10 %
Lowest heat of combustion
at least 5,000 kcal/kg
|
Total sulfur for dry condition
no more than 1 %
|
