坩鍋(guo)中(zhong)(zhong)(zhong)的(de)(de)(de)熔(rong)融金(jin)屬(shu)在感應(ying)(ying)圈(quan)(quan)產(chan)(chan)生(sheng)的(de)(de)(de)磁場中(zhong)(zhong)(zhong)產(chan)(chan)生(sheng)電動力(li)(li)，由于集膚(fu)效(xiao)應(ying)(ying)，熔(rong)融金(jin)屬(shu)產(chan)(chan)生(sheng)的(de)(de)(de)渦(wo)流與感應(ying)(ying)圈(quan)(quan)中(zhong)(zhong)(zhong)通過的(de)(de)(de)電流方(fang)(fang)向(xiang)(xiang)相反，產(chan)(chan)生(sheng)相互排斥作(zuo)用；熔(rong)融金(jin)屬(shu)受到的(de)(de)(de)排斥力(li)(li)始終指向(xiang)(xiang)坩鍋(guo)的(de)(de)(de)軸線方(fang)(fang)向(xiang)(xiang)，熔(rong)融金(jin)屬(shu)也被推(tui)向(xiang)(xiang)坩鍋(guo)的(de)(de)(de)中(zhong)(zhong)(zhong)間(jian)(jian)點(dian)(dian)；又由于感應(ying)(ying)圈(quan)(quan)是短線圈(quan)(quan)，兩頭有短部(bu)效(xiao)應(ying)(ying)，所以在感應(ying)(ying)圈(quan)(quan)兩頭相應(ying)(ying)電動力(li)(li)變小，電動力(li)(li)分布為上下兩頭小，中(zhong)(zhong)(zhong)間(jian)(jian)大在這種力(li)(li)作(zuo)用下，金(jin)屬(shu)液首(shou)先(xian)從(cong)中(zhong)(zhong)(zhong)部(bu)向(xiang)(xiang)坩鍋(guo)軸線運動，到中(zhong)(zhong)(zhong)間(jian)(jian)點(dian)(dian)后(hou)分別向(xiang)(xiang)上和向(xiang)(xiang)下方(fang)(fang)流去，此種現象不斷的(de)(de)(de)循環下去，便(bian)形成金(jin)屬(shu)液體的(de)(de)(de)激烈運動實際冶煉時可以清楚(chu)看(kan)到(dao)金屬液(ye)在坩鍋中間點部分(fen)向上(shang)隆起(qi)，上(shang)下翻騰(teng)的現(xian)象(xiang)，這就是電磁(ci)攪拌