fengshan 基本例句 封禅 This paper analyses the problem of the technological flowsheet for concentrator, Er- fengshan Iron Mine, and obtain obvious economical profit by improving technology to increase metal recovery. 分析了二峰山铁矿选矿厂工艺流程存在的问题，并通过技术改造提高金属回收率，取得了显著的经济效益。 dictall