生产锰粉有多种方法： （１）铁辗子辗碎后过筛，得到的锰粉。这种锰粉生产时没有气体保护，碾压过程中与空气接触氧化得多，黑色，作锰剂回收率低。粒度不均匀性大，－３００目至－４００目占有一部分。 （２）高速粉碎机粉碎生产。不能用气体保护，生产的猛粉氧化的多，黑色 There are many ways to produce manganese powder: (1) iron roller smashed after screening, the resulting manganese powder. This kind of manganese powder has no gas protection during its production. It is much more oxidized and contacted with air during the rolling process, and has a lower blackness and a lower manganese recovery rate. Particle size heterogeneity, -300 head to -400 head occupy part. (2) high-speed mill crush production. Can not use gas protection, the production of fierce powder oxidation, black