Presentation on theme: "XXXX Gold Mining Company"— Presentation transcript:
1 XXXX Gold Mining Company CYANIDE TRAINING Proper care and handling of sodium-carbon-nitrogen compoundsXXXX Gold Mining Company
2 Why the need for this Training? CYANIDE TRAININGWhy the need for this Training?• MSHA Safety & Health Training.To comply with the International Cyanide Management Code.• To Comply with the XXXX Cyanide Policy
3 CYANIDE TRAINING Why the need for this Training? To help ensure that Team Members are not exposed to harmful concentrations of cyanideTo assist all Team Members in understanding how cyanide is used safely and environment is protected.To respond appropriately to public inquiry.
4 CYANIDE TRAINING What is the International Cyanide Code? A Voluntary Industry Code of Practice for the use of Cyanide in Mining
5 What is the International Cyanide Code? Mission Statement: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.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 atXXXX assists in giving confidence to the public that cyanide can and is beingused with proper protection of Team Member and Community health andsafety and proper protection of the environment; and(2)Proper actions speak louder than appropriate words.
6 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 applicable internationally, in both developed and developing countries– 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 credible and verifiable– To be dynamic over time
7 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.
8 What is the International Cyanide Code? “Principles” of The Code (cont’d.):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 Grave”Management of Cyanide inthe gold mining industry to protectTeam Members, the Public, and the Environment.
9 Who Developed the International Cyanide Code? The Code Steering Committee MembersHomestake Mining Company, USAInternational Finance Corporation, USAGovernment of PeruWMC Resources, Ltd., AustraliaNormandy Mining Limited, AustraliaEldorado Gold Company, CanadaKennecott Minerals Company, USAGovernment of Ontario, CanadaUnited Steelworkers of America, CanadaDegussa, GermanyAngloGold Ltd., South AfricaUniversity of Nevada, Reno, USAWorld Wide Fund For Nature, AustraliaInternational Council of Chemical Associations, USAEuropean Commission, SpainMinas Luismin, MexicoEuropean Commission, Belgium
10 Who Assisted in International Cyanide Code Development? The Code Industrial Advisory Group(administered by the Gold Institute)AngloGold Company, South AfricaAshanti Goldfields Company, GhanaAustralian Gold Council, AustraliaAustralian Gold Reagents, AustraliaBarrick Gold Corp., CanadaDegussa, GermanyDupont, USAGlamis Gold, Ltd., USAGold Fields Limited, South AfricaThe Gold Institute, USAHomestake Mining Company, USAKinross Gold Corp., CanadaLihir Management Corp., Papua New GuineaMining Project Investors, AustraliaNewmont Gold Company, USANormandy Mining Limited, AustraliaPlacer Dome, Inc., CanadaSouth African Chamber of Mines, South AfricaRio Tinto, UKWMC Resources, Ltd., Australia
11 What is Cyanide? • Chemical Symbol: • “Better” Chemical Name: Sodium Cyanide• Chemical Symbol:NaCN• “Better” Chemical Name:Sodium Carbon Nitrogen
12 CYANIDE SAFETYUSESThe 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.
13 Why Use CN? “Chemistry” of Gold in VLF Cyanide has many uses, one of which is the “dissolution” of metals from rock(Uses Aerated, Alkaline Cyanide Solution)2 Au + 4 CN- + O2 + 2 H2O ==> 2 Au(CN)2- + H2O2 + 2 OH-and2 Au + 4 CN- + O2 + 2 H2O ==> 2 Au(CN) OH-Same reaction but a more recent view (calcium included):2 Au + 4 CN- + O2 + 2 H2O ==> 2 Ca+[Au(CN)2-] + H2O2 + 2 OH-
14 Process Description1. 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.LEACHPADPreg SolutionBarren Solution4. Preg Solution is Collected from Leach Pad and Pumped Back to ADR Plant were the Gold is Removed, with other metals.PREGPUMPSADRPLANT
15 Cyanide Safety Potential Areas for Exposure Fast Acting Poison Routes of EntryHCN Exposure LimitsSymptoms of Cyanide PoisoningFirst Aid Procedures
16 Potential Areas for Exposure Cyanide SafetyPotential Areas for ExposureADR PlantLabLeach Pad
17 Personal Protective Equipment Cyanide SafetyWhat is required?Personal Protective Equipment– Full PPE to Mix NaCN or perform maintenance work in NaCN storage areas.– Safety Glasses In All Areas.- No Acids NearCyanide.
18 Fast Acting Poison - if Exposure is to high levels - usually as HCN Cyanide SafetyFast Acting Poison - if Exposure is to high levels - usually as HCNCyanide 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!
19 NO EATING, DRINKING, OR SMOKING AROUND CYANIDE WORKING AREAS!! Cyanide SafetyRoutes of Entry– Skin– Eyes– Ingestion– InhalationNO EATING, DRINKING, OR SMOKING AROUND CYANIDE WORKING AREAS!!
20 Barren Solution Characteristics Cyanide SafetyBarren 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 LD50 of 15 mg/kg in Rats.
21 Cyanide Safety HCN Production • DO NOT Mix Acid and Cyanide!!! • The Higher the pH of the Solution the Less HCN Produced.• DO NOT Mix Acid and Cyanide!!!
22 Cyanide Safety HCN Exposure Current Limits New Guidance for PPE 10 ppm on an 8 hour TWA5 ppm on a 12 hour TWANew Guidance for PPE4.7 ppm Maximum** Recommended by the ACGIH (American Conference of Governmental Industrial Hygienists) but not yet approved. Suggested in International Code.
23 Cyanide Safety HCN Exposure Effects 2-5 ppm Odor threshold 4.7 ppm Maximum Exposure20-40 ppm Slight symptoms after several hours45-54 ppm Tolerated for ½ to 1 hour without significant immediate or delayed effectsppm Fatal within ½ to 1 hour300 ppm Rapidly fatal (if no treatment)
24 Symptoms of Cyanide Poisoning Cyanide SafetySymptoms of Cyanide PoisoningDelayed SymptomsIrritation of the throatSalivationGiddinessWeakness of the arms and legsDifficulty breathingPalpitationsNumbnessConvulsionsCollapseEarly SymptomsReddening of the eyes/skinNauseaHeadache
25 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:• No treatment is necessary. Just watch for symptoms to develop.– If Conscious but symptoms are evident:• Give Oxygen.– If Consciousness is impaired or the victim is unconscious:• Give Oxygen and Amyl Nitrite– If not breathing:• Give Oxygen and Amyl Nitrite immediately by means of a positive pressure respirator (artificial respiration).
26 Cyanide Safety First Aid Procedures Ingestion – Remove victim from contamination.Be careful of cross contamination!– If Conscious:• Give Activated Charcoal.– If Consciousness is impaired or the victim is unconscious:• DO NOT give Activated Charcoal!!
27 Current Flo-Bins Future Cyano-Dol & Excel II Tank Trucks ShippingCurrentFlo-BinsFutureCyano-Dol & Excel II Tank Trucks
29 Reporting All Spills Must be Reported to Your Supervisor Immediately. Any Spill off the Liner Must be Reported to EAD.Spills Must Be Reported to the State by EAD.Spills Over 10 Pounds of NaCN Must be reported to the Federal Environmental Agencies
30 Cyanide Management Protection of Environment Triple-Double Lined Valley Leach FacilityLined ADR and Storage AreaInspectionsMonitoringWithin VLF (LDS, LVSCS, Underdrains)Surface WaterGround WaterAir and “Release Inventory”
31 Valley Leach Facility Construction Sequence #2. Clay#5. Ore#1. GranodioriteSubgrade#4. Drain CoverFill#3. LLDPE
32 Summary • Why the Need for this Training • Cyanide Safety – Potential Exposure Areas– PPE– Fast Acting Poison– Routes of Absorption– Barren SolutionCharacteristics– HCN Production– HCN Exposure– Symptoms– First Aid• What is the Code– Mission Statement– Code Objectives– ”Principles” of The Code– Code Steering Committee– Industry Advisory GroupWhat is Cyanide?• Shipping (solid)– Flo-Bins– Tank Trucks• Why Cyanide?• Process Description• Reporting• Management