Please read this before using presentation

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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

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Toolbox presentation

• Dangerous goods in processing operations

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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

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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

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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

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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

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Storage and Handling Regulations (continued)
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Storage and Handling Regulations (continued)
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Storage and Handling Regulations (continued)
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Storage and Handling Regulations (continued)
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Dangerous goods code

• Australian Code for the Transport of Dangerous
  Goods by Road and Rail, 7th Edition (ADG 7)
• Available from
• Canprint (phone [phone])
• NTC (www.ntc.gov.au)

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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

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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)

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Division 6.1 Toxic substances
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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)

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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

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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)

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Requirements

• Licensing
• Placarding - tanks
• Pipework labelling
• Risk assessment
• Manifest site plan
• Design standards

• Spill containment
• Segregation
• Impact protection
• Ventilation
• Emergency plan
• Separation

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Licensing

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

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Placarding
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Pipework

• Labelling (content, flow)
• Secondary containment (sheathed underground)
• Impact protection

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Risk assessment
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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

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Spill containment (continued)
Crack on compound floor
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Spill containment (continued)
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Spill containment (continued)
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Spill containment (continued)
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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

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Inadequate segregation
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Impact protection

• Overhead lines versus cranes or vehicles
• Ground level lines versus vehicles
• Tanks or process vessels

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Ventilation issues

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

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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

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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