Retsch Cryomill - Manual (Page 57)

Safety and occupational health instructions
57
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9.5.3 Recommendations
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To avoid the danger of explosion:
• Always use suitable insulating lids (pay attention to waste gas opening).
• Observe filling levels to avoid the formation of ice on the insulating lid.
• Set up the vessel in dry and roofed rooms.
• Monitor atmospheric humidity in the installation room.
• Check vessel regularly for the collection of condensed water.
• Check vessel regularly for damage to surface or material damage
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9.5.4 General conduct in the case of an accident
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In the case of an accident from oxygen deficiency the following regulations should
be observed.
• Secure the surrounding area to avoid any subsequent accidents.
• Act quickly.
• The rescuers must take measures to protect themselves (respiratory
protection device).
• Move the injured persons from the hazardous area.
• Observe the company instructions for emergencies.
• Ventilate the rooms affected sufficiently.
• Investigate the cause of the accident.
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9.6 Oxygen enrichment
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9.6.1 Dangers
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Oxygen enrichment may increase the danger of explosion and fire.
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9.6.2 Causes
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Oxygen may be condensed from the air if liquid nitrogen is used and similarly be
liquefied because the boiling point of oxygen (approx. -183° C) is above that of
nitrogen (-196° C).
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9.6.3 Recommendations
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The following points must be considered in the case of oxygen enrichment:
• Do not smoke.
• Where possible, keep easily inflammable materials away from the vessel.