近年来,随着金银价格的猛涨,刺激了各国开采金银的积极性.在1980到1984年期间,全世界黄金总产量由1258吨增加到1422吨,平均每年递增3%以上.增长速度最快的国家有澳大利亚、美国.加拿大、中国和巴西,每年递增6～22%.随着金银开采规模的扩大,易采易选冶的矿石日益枯竭,难选冶矿石和贫矿的利用已经提到议事日程上,将成为金的主要生产原料.在难选冶矿石中,金以显微,次显微粒浸染或以同溶状态存在于硫化矿物(黄铁矿、 In recent years, with the soaring gold and silver prices, stimulating the enthusiasm of countries for gold and silver mining, the total output of gold in the world increased from 1,258 tons to 1,422 tons between 1980 and 1984, an average annual increase of more than 3%. Fastest countries are Australia, the United States, Canada, China and Brazil, an increase of 6 to 22% per annum.With the expansion of gold and silver mining, easy mining and ore dressing increasingly depleted, refractory ore and lean ore utilization Already mentioned on the agenda, will become the main raw material of gold in refractory ore, gold microscopic, sub-micro-particles or dissolved in the presence of sulfide minerals (pyrite,