作者单位:ZHANG Qing-feng,ZHENG Wei-min,LAI You-bang,TANG Qiang(Hebei Iron and Steel Group Luanxian Sijiaying Iron Mine Co, Ltd. ,Luanxian 063700,China)张庆丰,郑卫民,来有邦,唐强(河北钢铁集团滦县司家营铁矿有限公司,河北滦县063700)WANG Ai-dong(Hebei Iron and Steel Group Miaogou Iron Mine, Qinglong 066501 ,China)王爱东(河北钢铁集团矿业有限公司庙沟铁矿,河北青龙066501)WANG Hai-xia(Hebei Iron and Steel Group Sijiaying Yanshan Iron Mine Co, Ltd., Luanxian 063700, China)王海霞(河北钢铁集团司家营研山铁矿有限公司,河北滦县063700)