Oyu Tolgoi Mining and Processing EIA

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Oyu Tolgoi ProjectMining and Processing EIAConcentrate Load-OutDuring the initial operations phase, a wheel loader will load the concentrate into trucks for transport toa railhead in China. During the Phase 1c expansion, rail service will be available at the mine, and a railsiding will be routed through the loading point. The filter plant and storage shed will be enlarged todouble the storage capacity, and a second loading point will be added. Wheel loaders will fill the railwaycars from the pile below the filters.Tailings DisposalFlotation tailings will be thickened to 55% to 65% solids in two tailings thickeners. The thickener rakes,designed for winter operation, will be traction driven. Thickened tailings will be pumped through twotailings lines to a booster pumpstation near the tailings storage facility (TSF). The tailings lines willfollow a graded corridor to allow the tailings lines to drain into the booster pumpbox if operations areinterrupted. Two two-stage booster pump lines will distribute tailings around the TSF.Figure 1.15 Tailings DisposalProcess WaterProcess water will be supplied from two ponds at the concentrator, each capable of storing 24 hours'requirement. Make-up water will be added to the pond from the raw water supply system to maintainthe inventory. The ponds will collect reclaim water from the thickener's tailings dam, surplus water frommine dewatering, and runoff from the site drainage containment system.Prepared by ECO-TRADE LLC.,Environmental Consultants, MongoliaClient: Ivanhoe Mines Mongolia Inc(IMMI) XXKPart I- 37
Oyu Tolgoi ProjectMining and Processing EIARaw water from the borefield will be pumped to a tank close to the process plant for use in fire fighting,cooling, gland seal, column sprays, and other applications where clean water is required.Figure 1.16 Process Water SystemPrepared by ECO-TRADE LLC.,Environmental Consultants, MongoliaClient: Ivanhoe Mines Mongolia Inc(IMMI) XXKPart I- 38
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