normal align=center>天然放电镁(镁粉)一般技术指标
normal align=center>品级
normal align=center>ω(MnO2)%
normal align=center>ω(TFe)%
normal align=center>制成锰粉的放电时间min
normal align=center>Ⅰ
normal align=center>≥75
normal align=center>≤2.8
normal align=center>≥570
normal align=center>Ⅱ
normal align=center>≥70
normal align=center>≤3.5
normal align=center>≥510
normal align=center>Ⅲ
normal align=center>≥65
normal align=center>≤4.5
normal align=center>≥450
normal align=center>Ⅳ
normal align=center>≥60
normal align=center>≤5.5
normal align=center>≥390
normal align=center>Ⅴ
normal align=center>≥55
normal align=center>≤6.5
normal align=center>≥330
normal align=center>注:其他有害元素一般标准为:ω(Cu)<0.0l%,ω(Ni)<0.03%,ω(Co)<0.02%,ω(Pb)<0.02%。