美国蒙大拿州的克朗比尤特资源公司(Crown Butte Resources Ltd)宣布,新世界金矿工程不需要再用氰化物。一种无化学剂重选回路即将完成,可回收多达50%的金,其余的金以及铜和银将用泡沫浮选法产出。该公司将减缩许可的采区边界,以排除 Crown Butte Resources Ltd of Montana, USA, announced that the New World Gold Project does not require the use of cyanide. A chemical-free re-selection circuit is nearing completion, recovering as much as 50% gold, and the rest of the gold, as well as copper and silver, will be produced by the froth flotation process. The company will reduce the permitted mining area boundaries to exclude