Presentation on theme: "CYANIDE TRAINING Proper care and handling of sodium-carbon-nitrogen compounds XXXX Gold Mining Company."— Presentation transcript:
CYANIDE TRAINING Proper care and handling of sodium-carbon-nitrogen compounds XXXX Gold Mining Company
CYANIDE TRAINING Why the need for this Training? MSHA Safety & Health Training. To comply with the International Cyanide Management Code. To Comply with the XXXX Cyanide Policy
CYANIDE TRAINING Why the need for this Training? To help ensure that Team Members are not exposed to harmful concentrations of cyanide To help ensure that Team Members are not exposed to harmful concentrations of cyanide To assist all Team Members in understanding how cyanide is used safely and environment is protected. To assist all Team Members in understanding how cyanide is used safely and environment is protected. To respond appropriately to public inquiry. To respond appropriately to public inquiry.
CYANIDE TRAINING What is the International Cyanide Code? A Voluntary Industry Code of Practice for the use of Cyanide in Mining
What is the International Cyanide Code? To assist the global gold mining industry in improving cyanide management, thereby minimizing risks to workers, communities and the environment from the use of cyanide in gold mining, and reducing community concerns about its use. Mission Statement: Why does this concern XXXX Team Members in New Miner and Refresher courses? Because (1) Your professional knowledge about the proper use and care of cyanide at XXXX assists in giving confidence to the public that cyanide can and is being used with proper protection of Team Member and Community health and safety and proper protection of the environment; and (2)Proper actions speak louder than appropriate words.
What is the International Cyanide Code? Code Objectives : – To protect workers, communities and the environment from adverse effects of cyanide – To control, manage and improve the management of cyanide – To be used by large and small gold mining companies, cyanide manufacturers and transporters and to serve as a form of assurance for interested parties including regulators, financiers, communities and non- governmental organizations – To be applicable internationally, in both developed and developing countries – To be credible and verifiable – To be dynamic over time
What is the International Cyanide Code? Principles of The Code: 1. PRODUCTION: Encourage responsible manufacturing by only using cyanide produced in a safe and environmentally protective manner. 2. TRANSPORTATION: Protect Communities and the environment during cyanide transport. 3. HANDLING & STORAGE: Protect workers and the environment during cyanide handling and storage. 4. OPERATIONS: Manage cyanide process solutions and waste streams to protect human health and the environment. 5. DECOMMISSIONING: Protect communities and the environment from cyanide through development and implementation of decommissioning plans for cyanide facilities.
What is the International Cyanide Code? Principles of The Code (contd.): 6. WORKER SAFETY: Protect worker health and safety from exposure to cyanide. 7. EMERGENCY RESPONSE: Protect Communities and the environment through the development of emergency response strategies and capabilities. 8. TRAINING: Train workers and emergency response personnel to manage cyanide in a safe and environmentally protective manner. 9. DIALOGUE: Engage in public consultation and disclosure. In Summary: Cradle to GraveManagement of Cyanide in the gold mining industry to protect Team Members, the Public, and the Environment.
Who Developed the International Cyanide Code? The Code Steering Committee Members Homestake Mining Company, USA International Finance Corporation, USA Government of Peru WMC Resources, Ltd., Australia Normandy Mining Limited, Australia Eldorado Gold Company, Canada Kennecott Minerals Company, USA Government of Ontario, Canada United Steelworkers of America, Canada Degussa, Germany AngloGold Ltd., South Africa University of Nevada, Reno, USA World Wide Fund For Nature, Australia International Council of Chemical Associations, USA European Commission, Spain Minas Luismin, Mexico European Commission, Belgium
Who Assisted in International Cyanide Code Development? The Code Industrial Advisory Group (administered by the Gold Institute) AngloGold Company, South Africa Ashanti Goldfields Company, Ghana Australian Gold Council, Australia Australian Gold Reagents, Australia Barrick Gold Corp., Canada Degussa, Germany Dupont, USA Glamis Gold, Ltd., USA Gold Fields Limited, South Africa The Gold Institute, USA Homestake Mining Company, USA Kinross Gold Corp., Canada Lihir Management Corp., Papua New Guinea Mining Project Investors, Australia Newmont Gold Company, USA Normandy Mining Limited, Australia Placer Dome, Inc., Canada South African Chamber of Mines, South Africa Rio Tinto, UK WMC Resources, Ltd., Australia
What is Cyanide? Chemical Symbol: Chemical Name : Sodium Cyanide NaCN Better Chemical Name: Sodium Carbon Nitrogen
CYANIDE SAFETY The use of cyanide for the extraction of gold is only one of the many industrial uses of cyanide, accounting for less than 20% of worldwide hydrogen cyanide production. The remaining 80% is used in a variety of processes including the production of plastics (such as acrylics and nylon) and pharmaceuticals (ibuprofen and naproxen), processing of food (decaffeination of coffee and as an anti-caking additive in table salt), and for electroplating and hardening of steel. The use of cyanide for the extraction of gold is only one of the many industrial uses of cyanide, accounting for less than 20% of worldwide hydrogen cyanide production. The remaining 80% is used in a variety of processes including the production of plastics (such as acrylics and nylon) and pharmaceuticals (ibuprofen and naproxen), processing of food (decaffeination of coffee and as an anti-caking additive in table salt), and for electroplating and hardening of steel. USES
Cyanide has many uses, one of which is the dissolution of metals from rock (Uses Aerated, Alkaline Cyanide Solution) 2 Au + 4 CN - + O H 2 O ==> 2 Au(CN) H 2 O OH - and 2 Au + 4 CN - + O H 2 O ==> 2 Au(CN) OH - Same reaction but a more recent view (calcium included): 2 Au + 4 CN - + O H 2 O ==> 2 Ca + [Au(CN) 2 - ] + H 2 O OH - Why Use CN? Chemistry of Gold in VLF
Process Description ADR PLANT LEACH PAD Barren Solution PREG PUMPS Preg Solution 1. NaCN & NaOH (sodium hydroxide) are added to Barren Solution in ADR Plant. 2. Barren Solution is pumped to the Leach Pad. 3. Barren Solution Extracts Gold from Leach Pad Becoming Pregnant Solution. 4. Preg Solution is Collected from Leach Pad and Pumped Back to ADR Plant were the Gold is Removed, with other metals.
Cyanide Safety Potential Areas for Exposure Potential Areas for Exposure Fast Acting Poison Fast Acting Poison Routes of Entry Routes of Entry HCN Exposure Limits HCN Exposure Limits Symptoms of Cyanide Poisoning Symptoms of Cyanide Poisoning First Aid Procedures First Aid Procedures
Cyanide Safety Potential Areas for Exposure ADR Plant Lab Leach Pad
Cyanide Safety Personal Protective Equipment What is required? – Full PPE to Mix NaCN or perform maintenance work in NaCN storage areas. – Safety Glasses In All Areas. - No Acids Near Cyanide.
Cyanide Safety Fast Acting Poison - if Exposure is to high levels - usually as HCN Fast Acting Poison - if Exposure is to high levels - usually as HCN –Cyanide Prevents Cellular Respiration. Mainly in the Brain & Heart! –HCN Gas, Cyanide Dust or Solution are all Dangerous. –Cyanide poisoning is recoverable if treatment is administered quickly. Normally in 3-4 minutes! Therefore, responders must work quickly!
Cyanide Safety Routes of Entry Routes of Entry NO EATING, DRINKING, OR SMOKING AROUND CYANIDE WORKING AREAS!! – Skin – Eyes – Ingestion – Inhalation
Cyanide Safety Barren Solution Characteristics pH = >10.0 NaCN Concentration = lb/ton Lethal Ingested Dosages at this Concentration*: – 150 pound person = 2.5 gallons – 200 pound person = 3.5 gallons – 250 pound person = 4.5 gallons * Numbers are based off of LD 50 of 15 mg/kg in Rats.
Cyanide Safety HCN Production The Higher the pH of the Solution the Less HCN Produced. DO NOT Mix Acid and Cyanide!!!
Cyanide Safety HCN Exposure HCN Exposure –Current Limits 10 ppm on an 8 hour TWA 10 ppm on an 8 hour TWA 5 ppm on a 12 hour TWA 5 ppm on a 12 hour TWA –New Guidance for PPE 4.7 ppm Maximum * 4.7 ppm Maximum * * Recommended by the ACGIH (American Conference of Governmental Industrial Hygienists) but not yet approved. Suggested in International Code.
Cyanide Safety HCN Exposure HCN Exposure –Effects 2-5 ppm Odor threshold 2-5 ppm Odor threshold 4.7 ppm Maximum Exposure 4.7 ppm Maximum Exposure ppm Slight symptoms after several hours ppm Slight symptoms after several hours ppm Tolerated for ½ to 1 hour without significant immediate or delayed effects ppm Tolerated for ½ to 1 hour without significant immediate or delayed effects ppm Fatal within ½ to 1 hour ppm Fatal within ½ to 1 hour 300 ppm Rapidly fatal (if no treatment) 300 ppm Rapidly fatal (if no treatment)
Cyanide Safety Symptoms of Cyanide Poisoning –Delayed Symptoms Irritation of the throat Salivation Giddiness Weakness of the arms and legs Difficulty breathing Palpitations Numbness Convulsions Collapse –Early Symptoms Reddening of the eyes/skin Nausea Headache
Cyanide Safety First Aid Procedures – Sound Alarm. Protect Self with PPE. Remove victim from contamination, also remove contaminated clothing from the victim. Be careful of cross contamination! – If no symptoms are evident: – If Conscious but symptoms are evident: – If Consciousness is impaired or the victim is unconscious: – If not breathing: No treatment is necessary. Just watch for symptoms to develop. Give Oxygen. Give Oxygen and Amyl Nitrite Give Oxygen and Amyl Nitrite immediately by means of a positive pressure respirator (artificial respiration).
Cyanide Safety First Aid Procedures – Remove victim from contamination. Be careful of cross contamination! – If Conscious: – If Consciousness is impaired or the victim is unconscious: Ingestion Give Activated Charcoal. DO NOT give Activated Charcoal!!
ShippingCurrentFlo-BinsFuture Cyano-Dol & Excel II Tank Trucks
Flo-Bins Placards Placards Information Card Information Card
Reporting All Spills Must be Reported to Your Supervisor Immediately. All Spills Must be Reported to Your Supervisor Immediately. Any Spill off the Liner Must be Reported to EAD. Any Spill off the Liner Must be Reported to EAD. Spills Must Be Reported to the State by EAD. Spills Must Be Reported to the State by EAD. Spills Over 10 Pounds of NaCN Must be reported to the Federal Environmental Agencies Spills Over 10 Pounds of NaCN Must be reported to the Federal Environmental Agencies
Cyanide Management Protection of Environment Protection of Environment –Triple-Double Lined Valley Leach Facility –Lined ADR and Storage Area –Inspections –Monitoring Within VLF (LDS, LVSCS, Underdrains) Within VLF (LDS, LVSCS, Underdrains) Surface Water Surface Water Ground Water Ground Water Air and Release Inventory Air and Release Inventory
#1. Granodiorite Subgrade #2. Clay #3. LLDPE #4. Drain Cover Fill #5. Ore Valley Leach Facility Construction Sequence
Summary What is Cyanide? What is Cyanide? Why Cyanide? Cyanide Safety – Potential Exposure Areas – PPE – Fast Acting Poison – Routes of Absorption – Barren Solution Characteristics – HCN Production – HCN Exposure – Symptoms – First Aid Shipping (solid) – Flo-Bins – Tank Trucks Reporting Why the Need for this Training What is the Code – Mission Statement – Code Objectives – Principles of The Code – Code Steering Committee – Industry Advisory Group Process Description Management