Coal wood
(GOST 7657 – 84)
Charcoal – porous, fragile substance of brilliant black colour with bluish outflow in a break, keeping structure of initial wood. It is made by wood pyrolysis in vertical retorts in accordance with GOST 7657 – 84 marks «A» and «B».
Is the student of competition of «100 best goods of Russia».
INDICATORS
|
NORM
|
Marks «A»
|
Marks «B»
|
1.
|
The Mass fraction of ashes, %
|
No more than 2,5
|
2,0
|
2,0
|
2.
|
The Mass fraction of nonvolatile carbon, %
|
No more than 90
|
89
|
88
|
3.
|
The Mass fraction of water, %
|
No more than 6
|
6
|
6
|
4.
|
With grains in places of loading, %
-the size less than 25 mm
-the size less than 12 mm
|
Not restricted
5
|
Not restricted
5
|
Not restricted
7
|
5.
|
The Maintenance firebrand
|
Is not supposed
|
Defoult
|
Defoult
|
It is applied by manufacture:
- active coals carbon bisulphide
- carburizer, electrocoal products
- calcium-silicon, crystal silicon
- nonferrous metals
- in ferrous metallurgy
Packing:
- paper bags: 2, 2,5, 5 kg
- polyethylene bags 8, 9, 10 kg

