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Please read this before using presentation

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This presentation is based on content presented at the Mines Safety Roadshow held in October 2009 It is made available for non-commercial use (e.g. toolbox meetings ... – PowerPoint PPT presentation

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Title: Please read this before using presentation


1
Please read this before using presentation
  • This presentation is based on content presented
    at the Mines Safety Roadshow held in October 2009
  • It is made available for non-commercial use (e.g.
    toolbox meetings) subject to the condition that
    the PowerPoint is not altered without permission
    from Resources Safety
  • Supporting resources, such as brochures and
    posters, are available from Resources Safety
  • For resources, information or clarification,
    please contact
  • RSDComms_at_dmp.wa.gov.au
  • or visit
  • www.dmp.wa.gov.au/ResourcesSafety

2
Toolbox presentation
  • Dangerous goods in processing operations

3
Examples of process chemicals
  • Flammable liquids (some frothers) Class 3
  • Solvent extraction C1 Combustible Liquid
  • Xanthates (solid) Division 4.2
  • Hydrogen peroxide Division 5.1/Class 8
  • Sodium cyanide (solid and solutions) Division
    6.1
  • Acids and alkalis Class 8

4
Dangerous Goods Safety Act 2004
  • Section 8
  • must take all reasonably practicable measures
    to minimise risk from dangerous goods
  • Taking into account
  • severity of the risk
  • severity of any potential injury, harm or damage
  • public knowledge about the risk or damage
  • public knowledge about means to reduce or
    eliminate risk
  • availability, suitability and cost of those means

5
Dangerous Goods Safety Regulations
  • Dangerous Goods Safety (Storage and Handling of
    Non-explosives) Regulations 2007
  • Dangerous Goods Safety (Major Hazard Facilities)
    Regulations 2007
  • Dangerous Goods Safety (Explosives) Regulations
    2007
  • Dangerous Goods Safety (Security Risk Substances)
    Regulations 2007
  • Dangerous Goods Safety (Goods in Ports)
    Regulations 2007
  • Dangerous Goods Safety (Road and Rail Transport
    of Non-explosives) Regulations 2007
  • Dangerous Goods Safety (General) Regulations 2007

6
Storage and Handling Regulations
  • Applies to dangerous goods in process as well as
    storage
  • Question
  • Does this mean CIP/CIL tanks, in line leach
    reactors, SX/EW, thickeners, pipework etc.?
  • Answer
  • Yes - if they contain dangerous goods

7
Storage and Handling Regulations (continued)
Item Description of dangerous goods Packing group Placarding quantity Manifest quantity
1 Division 2.1 except aerosols Not applicable 500 L 5,000 L
2 Division 2.2 except aerosols Not applicable 1,000 L 10,000 L
3 Division 2.3 Not applicable 50 L 500 L
4 Division 2.1 and 2.2 aerosols Not applicable 5,000 L 10,000 L
8
Storage and Handling Regulations (continued)
Item Description of dangerous goods Packing group Placarding quantity Manifest quantity
5 Any one of Class 3, Division 4.1, 4.2 or 4.3, Division 5.1 or 5.2, Division 6.1, Class 8 or Class 9, or any combination of those classes or divisions I 50 kg or L 5,000 L
5 Any one of Class 3, Division 4.1, 4.2 or 4.3, Division 5.1 or 5.2, Division 6.1, Class 8 or Class 9, or any combination of those classes or divisions II and III (aggregate) 1,000 kg or L 10,000 kg or L
5 Any one of Class 3, Division 4.1, 4.2 or 4.3, Division 5.1 or 5.2, Division 6.1, Class 8 or Class 9, or any combination of those classes or divisions I, II and III (aggregate) where quantity of goods in packing group I does not exceed 50 kg or L 1,000 kg or L 10,000 kg or L
9
Storage and Handling Regulations (continued)
Item Description of dangerous goods Packing group Placarding quantity Manifest quantity
6 C1 combustible liquid with or near fire risk dangerous goods (Division 2.1, Class 3, Division 4.1, 4.2 or 4.3, Division 5.1 or 5.2 Not applicable 1,000 L 10,000 L
7 C1 combustible liquid not covered in Item 6 Not applicable 10,000 L 100,000 L
10
Storage and Handling Regulations (continued)
11
Dangerous goods code
  • Australian Code for the Transport of Dangerous
    Goods by Road and Rail, 7th Edition (ADG 7)
  • Available from
  • Canprint (phone 1300 889 873)
  • NTC (www.ntc.gov.au)

12
What are dangerous goods?
  • How can I tell if a material (such as cyanide in
    process) is a dangerous good?
  • Listed in ADG 7
  • Meet test criteria from ADG 7
  • Stated as such on material safety data sheet
    (MSDS) or safety data sheet (SDS)
  • Listed in the Regulations (e.g. sulfur in any
    form)
  • Determined as such by the Chief Officer

13
What are dangerous goods? (continued)
  • Test criteria likely to be relevant to process
    solutions
  • Example - cyanide process liquor
  • Division 6.1 Toxic
  • Class 8 Corrosive (caustic in cyanide
    solutions)
  • Class 9 Miscellaneous dangerous goods (entries
    for environmentally hazardous substances)

14
Division 6.1 Toxic substances
Packing group Oral toxicity LD50 (mg/kg) Dermal toxicity LD50 (mg/kg) Inhalation toxicity (dusts or mists) LC50 (mg/L)
I 5 50 0.2
II gt 5, 50 gt 50, 200 gt 0.2, 2.0
III gt 50, 300 gt 200, 1000 gt 2.0, 4.0
15
Division 6.1 Toxic substances (continued)
  • For liquids evolving toxic vapours
  • Saturated vapour concentration in air (V) of
    material compared with LC50
  • PG I V 10 LC50 and LC50 1000 ml/m3
  • PG II V LC50 and LC50 2000 ml/m3 (and not
    PG I)
  • PG III V 1/5 LC50 and LC50 5000 ml/m3 (and
    not PG I/II)

16
Class 8 Corrosive substances
  • Classification criteria
  • PG I - Full thickness destruction of skin within
    60 minutes of a 3 minute exposure
  • PG II - Full thickness destruction of skin within
    14 days of an exposure between 3 and 60 minutes
  • PG III - Full thickness destruction of skin
    within 14 days of exposure between 1 and 4 hours
  • or
  • exhibits corrosion rate on aluminium or steel
  • gt 6.25 mm/year at 55ºC

17
Class 9 Miscellaneous dangerous goods
  • Environmentally hazardous substances, liquid,
    not otherwise specified - NOS (UN 3082)
  • Classification based on acute toxicity for fish,
    crustacea, algae and water plants as well as
    octanol-water partition coefficient (OECD test
    107 or 117) or bioconcentration factor (BCF) if
    available (test 305)
  • Chronic toxicity is assessed for fish (test 210),
    daphnia reproduction (test 211) and algal growth
    inhibition (test 201)

18
Requirements
  • Licensing
  • Placarding - tanks
  • Pipework labelling
  • Risk assessment
  • Manifest site plan
  • Design standards
  • Spill containment
  • Segregation
  • Impact protection
  • Ventilation
  • Emergency plan
  • Separation

19
Licensing
  • Dangerous goods stored and handled on site
  • Reagent storage
  • Dissolution vessels
  • Header tanks
  • Process vessels
  • Process pipework
  • Autoclaves

20
Placarding
21
Pipework
  • Labelling (content, flow)
  • Secondary containment (sheathed underground)
  • Impact protection

22
Risk assessment
23
Spill containment
  • Delivery transfer points (solution, sparge,
    solid)
  • Pipework
  • Storage tanks
  • Process tanks
  • Ground contouring
  • Deflection screens (tank top, ground level)
  • Leaks from base of flat bottom tanks
  • Double sheathing of underground and overhead
    lines with provision for leaks to be obvious

24
Spill containment (continued)
Crack on compound floor
25
Spill containment (continued)
26
Spill containment (continued)
27
Spill containment (continued)
28
Segregation of incompatible goods
  • CIP/CIL tanks versus acid wash columns
  • Acid lines routed through cyanide areas or vice
    versa
  • Acid and alkali or cyanide lines in overhead
    trays together
  • Beware of sump or bund pump operation
  • Peroxides or combustibles

29
Inadequate segregation
30
Impact protection
  • Overhead lines versus cranes or vehicles
  • Ground level lines versus vehicles
  • Tanks or process vessels

31
Ventilation issues
  • Xanthates
  • Hazardous zones carbon disulfide
  • Tails screens
  • Out of the way
  • Elevated
  • Well ventilated
  • Personnel well clear when flushing tails screens

32
Guidance
  • Resources Safety
  • General
  • Storage and handling of dangerous goods code of
    practice
  • Emergency planning code
  • Dangerous Goods Safety Guidance Notes S01/09 and
    S02/09
  • Division 5.1
  • Safe storage of solid ammonium nitrate code of
    practice

33
Other approved codes of practice
  • Class 2 AS/NZS 1596, AS 3961, AS 4332, AS/NZS
    2022, AS/NZS 2927
  • Class 3 AS 1940
  • Division 5.1 - AS 4326, AEMSC Code of good
    practice precursors for explosives
  • Division 5.2 AS 2714
  • Division 6.1 AS/NZS 4452
  • Class 8 AS 3780
  • Class 9 AS/NZS 4081, AS/NZS 4681
  • Other AS/NZS 3833
  • Note Australian Standards and AEMSC code
    approved as codes of practice under s. 20 of Act
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