第11期 刘志国等：红土镍矿原矿性质及其对直接还原焙烧的影响机理 ·1453· 20 Hm 420 20um8- 20m 1.8 ( 1.6 14 0.8 0.6 0.4 0 Ni 234 5678910 4 5678910 能量keN 能量keN 4.5fg 40 (h) 4.0 Fe 3.5 3.00 25 2.0 2.0 1.5 15 1.0 1.0 0.5h 05 0 3 456 > 8 9 10 3 4567 8910 能量keV 能量ke\ 图8焙烧矿及磁选尾矿扫描电镜照片和能谱.(a)试样1焙烧矿：(b)试样2焙烧矿：(c)试样1磁选尾矿：()试样2磁选尾矿：(01点 能谱：(02点能谱：(g)3点能谱：(h)4点能谱 Fig.8 SEM images and EDS spectra of roasting ore and magnetic separation tailings:(a)roasted ore of Sample 1:(b)roasted ore of Sample 2:(e) magnetic separation tailings of Sample 1:(d)magnetic separation tailings of Sample 2:(e)EDS spectrum of Point 1:(f)EDS spectrum of Point 2: (g)EDS spectrum of Point 3:(h)EDS spectrum of Point 4第 11 期 刘志国等: 红土镍矿原矿性质及其对直接还原焙烧的影响机理 图 8 焙烧矿及磁选尾矿扫描电镜照片和能谱． ( a) 试样 1 焙烧矿; ( b) 试样 2 焙烧矿; ( c) 试样 1 磁选尾矿; ( d) 试样 2 磁选尾矿; ( f) 1 点 能谱; ( f) 2 点能谱; ( g) 3 点能谱; ( h) 4 点能谱 Fig． 8 SEM images and EDS spectra of roasting ore and magnetic separation tailings: ( a) roasted ore of Sample 1; ( b) roasted ore of Sample 2; ( c) magnetic separation tailings of Sample 1; ( d) magnetic separation tailings of Sample 2; ( e) EDS spectrum of Point 1; ( f) EDS spectrum of Point 2; ( g) EDS spectrum of Point 3; ( h) EDS spectrum of Point 4 · 3541 ·