Calcite siderite barite and others don 't contain gold .

方解石、菱铁矿、重晶石等不含金。

Problems encountered amid the industrialization of the research achievements on the mineral processing of siderite and limonite were analyzed and corresponding countermeasures were proposed .

针对目前菱、褐铁矿分选技术科研成果产业化过程中存在的问题，提出了相应对策。