第6期 阮书锋等：镍铁矿选择性还原焙烧相变研究 ·745· 200H 1一针铁矿：2一赤铁矿一石英的微粒杂相：3一水针铁矿：4一赤铁矿 图3镍铁矿光学显微镜相图.()带状针铁矿：(b)带状水针铁矿：(c)赤铁矿-石英杂相：(d)赤铁矿与水针铁矿 Fig.3 Optical microscopy photos of catarinite:(a)banded goethite:(b)banded hydrogoethite:(e)hematite and quartz impurity phase:(d)hem- atite and hydrogoethite 70u用 Fe Kal Ni Kal 图4不含锰的铁矿背散射电子像及相关元素的面分布图 Fig.4 Backscattered electron image and related element profile of Mn-free iron minerals 400um Fe Kal Ni Kal Mn Kal 图5含锰的铁矿背散射电子像及相关元素的面分布图 Fig.5 Backscattered electron image and related element profiles of Mn-contained iron mineral第 6 期 阮书锋等: 镍铁矿选择性还原焙烧相变研究 1—针铁矿; 2—赤铁矿--石英的微粒杂相; 3—水针铁矿; 4—赤铁矿 图 3 镍铁矿光学显微镜相图． ( a) 带状针铁矿; ( b) 带状水针铁矿; ( c) 赤铁矿--石英杂相; ( d) 赤铁矿与水针铁矿 Fig． 3 Optical microscopy photos of catarinite: ( a) banded goethite; ( b) banded hydrogoethite; ( c) hematite and quartz impurity phase; ( d) hem￾atite and hydrogoethite 图 4 不含锰的铁矿背散射电子像及相关元素的面分布图 Fig． 4 Backscattered electron image and related element profile of Mn-free iron minerals 图 5 含锰的铁矿背散射电子像及相关元素的面分布图 Fig． 5 Backscattered electron image and related element profiles of Mn-contained iron mineral ·745·