“招远市北截金矿湿法提取金银新工艺研究”项目，已通过山东省科委组织的鉴定。 这种工艺用于工业生产实践已有１年多时间，它可解决火法冶炼成品金冶炼能力低、周期长、渣量大、成本高、成色低、回收率低、污染大等一系列难题，采用该工艺金和银的直收率由原来的９９％和６５ “Zhaoyuan Beijiao gold mine wet extraction of gold and silver new technology research” project, has passed the identification of Shandong Provincial Science and Technology Commission. This process has been used in industrial production for more than one year. It can solve a series of problems such as low smelting ability, long cycle length, large amount of slag, high cost, low color, low recovery rate, large pollution and so on. , Using the process of straight gold and silver yield from the original 99% and 65