世界上金银价格不断上涨,激励了企业家们寻求低品位和表外矿的利用途径和开采小型矿山的积极性。一种能取代常规采矿和选矿的方法——浸出法应运而生。由于它具有基建投资少、生产费用低、流程简单和规模可大可小等优点,表现了强大的生命力。迄今,美国已有八十多个矿进行过不同规模的 The rising price of gold and silver in the world has encouraged entrepreneurs to seek ways to exploit low-grade and off-balance-sheet mines and motivate small-scale mines to be mined. A method that can replace conventional mining and beneficiation - the leaching method came into being. Because of its less investment in infrastructure, low production costs, the process is simple and the advantages of small size, showing a strong vitality. To date, more than 80 mines in the United States have been at different scales