2018-08-22_REVISION - M1977493 - Laserfiche WebLink

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Technical Revision (TR -28) Climax Molybdenum Company Environmental Protection Plan Permit No. M-1977-493 that is sloped to a sump so that material can be placed back in the mill circuit or sent to tailing. In the event of a collector distribution system failure, the collector will be contained within the mill building. T-3.2.2 Collector Dispersant Tergitol NP -4 Surfactant (or similar) is used in the flotation circuit as a collector dispersant, mixing with the primary collector at a small proportion (e.g., 0.1%). It disperses the collector into small droplets which, in turn, increases the collection efficiency of molybdenite particles. The product is 4 -mole Ethylene Oxide adduct of Nonyl Phenol. It contains less than 3% Dinonylphenyl Polyoxyethylene and Polyethylene Glycol. Direct contact with this product will cause eye burns and skin irritation. Aspiration may cause lung damage. The product is water insoluble but completely soluble in oil. It is considered as low HLB emulsifier with flash point 425°F. It may be stored as totes within Area 430 (floatation) with the same spill prevention and containment protocol as other reagents stored in the area (e.g., cleaner frother). T-3.2.3 Primary Frother A frother reagent creates froth in the agitated slurry and assists in holding the froth intact at the surface of the floatation cell. Nalco Froth Pro 509 (or similar) is utilized in the mill circuit as the primary flotation frother. Nalco Froth Pro 509 contains aliphatic alcohol and is combustible. Primary exposure pathways include eye contact, skin contact and inhalation. The frother is stored in one tank with a capacity of 9,300 gallons. The frother is stored in the reagent storage area of the mill building (see Mill Building Detail - Area 450 on the south side of the mill building on Figure AM -06-T-05). Secondary containment with a volume greater than that of the tank is provided in the reagent storage area (see Reagent Storage Area Detail Figure AM -06-T-06). Tank level indication is available locally as well as through the control system. The control system will alarm for a given tank low and high level. Both a horn and beacon are provided at the unloading point to indicate a tank high level. In the event of a storage tank failure, the frother will be contained in the reagent storage area via secondary containment. The secondary containment area is equipped with a sump but no sump pump. In the event of a release in this area, a pump will be placed in the secondary containment sump and the frother will be routed back into the process circuit or pumped into a suitable container for proper disposal through direction from the environmental department. A spill that occurs during offloading into the storage tank will be handled similarly using a sump located in the offloading area. When needed, frother may be stored as totes in Area 430 (floatation). Area 430 has a concrete floor that is sloped to a sump so that material can be placed back in the mill circuit or sent to tailing. In the event of a frother distribution system failure, the frother will be contained within the mill building. T-3.2.4 Cleaner Frother CorsiTech FrothPro 327 (or similar) is used in the secondary mill regrind circuit as a flotation frother. It is comprised of polypropylene glycol butyl ether. Direct contact with this material may cause mild eye and skin irritation. CorsiTech FrothPro 327 is a stable product that is completely soluble in water. CorsiTech FrothPro 327 has a National Fire Protection Agency rating of2 for health and for fire, meaning the material can cause significant irritation and that the material must be preheated before ignition can occur. The Cleaner Frother reagent is delivered in 300 gallon totes, which may be stored in the curbed area identified to the north of the iron depressant storage tank (see Reagent Storage Area Detail Figure AM - 06 -T-07). This containment area connects to the one described above for the collector, therefore excess containment capacity is provided for the Cleaner Frother totes In the event of a release in this area, a pump will be placed in the secondary containment sump and the cleaner frother will be routed back into the process circuit or pumped into a suitable container for proper disposal through direction from the EPP: Version R4 T-10 August 2018