Andritz MC - Page 24

Medium-consistency pump MC
STANDARD, C-01-000000
Rev. 0, 2010.02.09 SAFETY Kap.2 , Seite 14 of 20
GRZ-2698567-v1-Safety.FM
• Hydrogen peroxide H
2
O
2
• Caustic soda (sodium hydroxide) (NaOH)
• Sodium dithionite Na
2
S
2
O
4
• Sulphuric acid H
2
SO
4
These chemicals may irritate or causing burning to skin and mucous
membranes, particularly the eyes, and can lead to inflammations in the
respiratory tract.
In addition, please note that hydrogen peroxide (H
2
O
2
) is not combustible,
but enhances the combustibility of other substances.
+ ..... no reaction
+ warm ..... weak exotherm. reaction (small change of temperature)
+ hot ..... exotherm. reaction (stronger fluctuation of temperature)
- ..... reaction
- very hot ..... very strong exotherm. reaction! Danger!
In order to avoid chemical burns, the chemical supply has to be closed
properly before starting maintenance work.
NaOH H
2
SO
4
Na
2
S
2
O
4
H
2
O
2
H
2
O
NaOH
+ - (very hot) + - + (heiß)
H
2
SO
4
- (very hot) + +(warm) +(warm) +(warm)
Na
2
S
2
O
4
+ + (warm) + + +
H
2
O
2
- (oxygen
discharge)
+ (warm) + + +
H
2
O
+ (hot) + warm) + + +
Tab. 2-4 recommended order of chemicals used