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».
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INDICATORS
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NORM
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Marks «A»
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Marks «B»
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1.
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The Mass fraction of ashes, %
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No more than 2,5
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2,0
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2,0
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2.
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The Mass fraction of nonvolatile carbon, %
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No more than 90
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89
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88
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3.
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The Mass fraction of water, %
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No more than 6
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6
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6
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4.
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With grains in places of loading, %
-the size less than 25 mm
-the size less than 12 mm
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Not restricted
5
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Not restricted
5
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Not restricted
7
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5.
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The Maintenance firebrand
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Is not supposed
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Defoult
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Defoult
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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
