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新桥铁帽型金银矿石氧化程度高、含泥量大，金呈细粒及显微细粒嵌布。银金比大于２０∶１，含铜。脉石矿物磨细后遇水膨胀，矿浆粘稠、液固分离困难。属难处理矿石。经试验研究，推荐全泥氰化锌粉置换流程。设计采用湿式半自磨十球磨—全泥氰化—全絮凝逆流洗涤—锌粉置换工艺流程。经过几年生产实践，设计流程畅通，技术指标接近，达到设计技术指标，经济效益显著，社会效益明显。铁帽型金银矿石是２０世纪８０年代初在国内开始开发利用的新类型金矿石。１９８５年７月，长春黄金研究所开始对新桥铁帽型金银矿石进行选矿试验和工程设计。设计采用湿式半自磨全泥氰化—全絮凝逆流洗涤—锌粉置换工艺流程。１９８８年５月，１００ｔ／ｄ生产规模选金厂建成并进行试生产，当年即生产黄金１７３２两，我国首次开发利用铁帽型金银矿石获得成功。经过４年多的生产实践证明，设计流程合理，技术指标可靠，特别是采用湿式半自唐技术和高效阴离子絮凝剂的选择和应用，取得了良好效果，经济效益和社会效益显著，为长江中下游地区开发铁帽型金银矿石资源开创了一条新的途径。
Xinqiao iron cap type gold and silver ore oxidation level is high, with a large amount of mud, gold was fine and fine particles embedded. Silver ratio greater than 20: 1, containing copper. Gangue mineral grinding met water swelling, pulp viscosity, liquid-solid separation difficult. Is difficult to deal with ore. The experimental study, the recommended whole mud zinc cyanide powder replacement process. Design using wet semi-grinding ten ball mill - full mud cyanide - full flocculation countercurrent washing - zinc powder replacement process. After several years of production practice, the design flow is smooth, the technical indicators are close, and the design technical indexes are reached. The economic benefits are obvious and the social benefits are obvious. Iron cap gold and silver ore is a new type of gold ore started to be developed and utilized in China in the early 1980s. In July 1985, the Changchun Institute of Gold started the beneficiation test and engineering design of the Xinqiao iron hat type gold and silver ore. Design using wet semi-abrasive full mud cyanidation - full flocculation countercurrent washing - zinc powder replacement process. May 1988, 100t / d production scale gold factory built and trial production, the year that the production of gold 1732 two, China’s first development and utilization of iron cap gold and silver ore success. After more than 4 years of production practice, the design process is reasonable and the technical indicators are reliable. In particular, the selection and application of wet semi-Tang technology and high-efficiency anionic flocculant have achieved good results with significant economic and social benefits. Downstream areas to develop iron cap gold and silver ore resources to create a new way.