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海尔(Haile)金矿在1942年以前是密西西比河东的最大产金基地。该矿是英国政府降低金价之后第一个在东南地区重新开采的金矿山,也是东南第一家用堆浸和炭回收生产金的矿山。目前产量(包括开采和堆浸)约1.8千吨/日(1600短吨/日)。炭作为回收介质。由于氧化岩中有粘土和超细粒,因此在浸击出之前必须用波特兰水泥制团。制团矿石的筛孔尺寸从50毫米(2英寸)至不到75微米(200网目)。由于制团,再加上其他一些条件,使Piedmomt采矿公司的回收率达90％左右,甚至更高。
The Haile Gold Mine was the largest gold production base in the Mississippi River east of 1942. The mine is the first gold mine to be re-explored in the southeast after the British government lowered its gold price and is the first mine in the southeast to recover gold from heap leaching and charcoal recycling. The current production (including mining and heap leaching) is about 1.8 kt / d (1,600 kt / day). Carbon as a recovery medium. Due to the presence of clay and ultrafine particles in the oxide rock, it is essential to use Portland cement before dredging out. Mesolithic ore has mesh openings ranging from 50 mm (2 inches) to less than 75 microns (200 mesh). Thanks to the mass production, plus some other conditions, the Piedmomt mining company’s recovery rate is around 90% or even higher.