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CYANIDE TRAINING Proper care and handling of sodium-carbon-nitrogen compounds

CYANIDE TRAINING Proper care and handling of sodium-carbon-nitrogen compounds. XXXX Gold Mining Company . CYANIDE TRAINING. • MSHA Safety & Health Training. To comply with the International Cyanide Management Code. Why the need for this Training?. • To Comply with the XXXX Cyanide Policy.

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CYANIDE TRAINING Proper care and handling of sodium-carbon-nitrogen compounds

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  1. CYANIDE TRAININGProper care and handling of sodium-carbon-nitrogen compounds XXXX Gold Mining Company

  2. CYANIDE TRAINING • • MSHA Safety & Health Training. • To comply with the International Cyanide Management Code. Why the need for this Training? • To Comply with the XXXX Cyanide Policy

  3. What is Cyanide? • Chemical Name : Sodium Cyanide • • Chemical Symbol: NaCN • “Better” Chemical Name: Sodium Carbon Nitrogen

  4. CYANIDE SAFETY USES • 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.

  5. 1. NaCN & NaOH (sodium hydroxide) are added to Barren Solution in ADR Plant. Process Description 2. Barren Solution is pumped to the Leach Pad. 3. Barren Solution Extracts Gold from Leach Pad Becoming Pregnant Solution. LEACH PAD Preg Solution Barren Solution 4. Preg Solution is Collected from Leach Pad and Pumped Back to ADR Plant were the Gold is Removed, with other metals. PREG PUMPS ADR PLANT

  6. Cyanide Safety • Potential Areas for Exposure • Fast Acting Poison • Routes of Entry • HCN Exposure Limits • Symptoms of Cyanide Poisoning • First Aid Procedures

  7. ADR Plant Cyanide Safety Lab Leach Pad Potential Areas for Exposure

  8. What is required? – Full PPE to Mix NaCN or perform maintenance work in NaCN storage areas. CyanideSafety Personal Protective Equipment – Safety Glasses In All Areas. - No Acids Near Cyanide.

  9. Cyanide Safety • 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!

  10. CyanideSafety • Routes of Entry – Skin – Eyes – Ingestion – Inhalation NO EATING, DRINKING, OR SMOKING AROUND CYANIDE WORKING AREAS!!

  11. • pH = >10.0 CyanideSafety • NaCN Concentration = 0.200 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 Barren Solution Characteristics * Numbers are based off of LD50 of 15 mg/kg in Rats.

  12. CyanideSafety • The Higher the pH of the Solution the Less HCN Produced. HCN Production • DO NOT Mix Acid and Cyanide!!!

  13. CyanideSafety • HCN Exposure • Current Limits • 10 ppm on an 8 hour TWA • 5 ppm on a 12 hour TWA • New Guidance for PPE • 4.7 ppm Maximum* * Recommended by the ACGIH (American Conference of Governmental Industrial Hygienists) but not yet approved. Suggested in International Code.

  14. CyanideSafety • HCN Exposure • Effects • 2-5 ppm Odor threshold • 4.7 ppm Maximum Exposure • 20-40 ppm Slight symptoms after several hours • 45-54 ppm Tolerated for ½ to 1 hour without significant immediate or delayed effects • 100-200 ppm Fatal within ½ to 1 hour • 300 ppm Rapidly fatal (if no treatment)

  15. CyanideSafety • 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 Symptoms of Cyanide Poisoning

  16. CyanideSafety – Sound Alarm.Protect Self with PPE. Remove victim from contamination, also remove contaminated clothing from the victim. Be careful of cross contamination! First Aid Procedures – 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).

  17. CyanideSafety Ingestion First Aid Procedures – 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!!

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