Bureau of Mines roast-leach laterite processing technology was studied on a pilot plant scale. Data were scaled-up and incorporated into an economic feasibility study for a 5,000-ton-per- day grassroots processing facility. Estimated capital cost (+/-30 pct) for a mine and plant is $367 million with an estimated $103 million per year operating cost. The study indicated that low-grade domestic laterite may be processed with marginal profitability.
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