The paper reports the hazard of much more content of Fe and Mn of water, the Fe-removing principle and result by natural Mn, operation caution and methods of extention service life.

• 分析了水中铁锰含量过多的危害，阐述天然锰砂的除铁原理、铁效果、作注意事项和延长使用寿命的方法。