Fig 1.
Sampling locations.
Fig 2.
Meshing method.
Fig 3.
Macromorphologies of the coke in the hearth.
(a) Sample ① at 0 m horizontal and 1 m vertical; (b) Sample ② at 2 m horizontal and 1 m vertical; (c) Sample ③ at 4 m horizontal and 1 m vertical; (d) Sample ④ at 6 m horizontal and 1 m vertical; (e) Sample ⑤ at 7.5 m horizontal and 1 m vertical; (f) Sample ⑥ at 7.5 m horizontal and 2.4 m vertical; (g) Sample ⑦ at 7.5 m horizontal and 3.8 m vertical; (h) Sample ⑧ at 7.5 m horizontal and 5.2 m vertical; (i) coke eroded by liquid metal at 0–2 m horizontal and 1 m vertical; (j) slag and iron at 0–4 m horizontal and 1 m vertical; (k) slag and iron at 6–7.5 m horizontal and 1 m vertical; and (l) original coke.
Fig 4.
Distribution of liquid metal and slag in the hearth of the 5,800 m3 blast furnace.
Fig 5.
Microstructures of the coke under the optical microscope.
(a) Sample ① under ×500 polarizing microscope with oil immersion lens; (b) Sample ② under ×500 polarizing microscope with oil immersion lens; (c) Sample ③ under ×500 microscope with oil immersion lens; (d) Sample ④ under ×500 polarizing microscope with oil immersion lens; (e) Sample ⑤ under ×500 polarizing microscope with oil immersion lens; (f) Sample ⑥ under ×500 polarizing microscope with oil immersion lens; (g) Sample ⑦ under ×500 polarizing microscope with oil immersion lens; (h) Sample ⑧ under ×500 polarizing microscope with oil immersion lens; (i) Sample ② under ×500 microscope with oil immersion lens; (j) Sample ⑤ under ×200 microscope with dry lens; (k) original coke under ×500 polarizing microscope with oil immersion lens; (l) ultragraphite morphology under ×500 polarizing microscope with oil immersion lens.
Fig 6.
Slag-to-porosity ratio.
Fig 7.
XRD patterns of the coke vs. horizontal distance.
Fig 8.
XRD patterns of the coke vs. vertical distance.
Fig 9.
(a) Sample ① at 0 m horizontal and 1 m vertical; (b) Sample ② at 2 m horizontal and 1 m vertical; (c) Sample ③ at 4 m horizontal and 1 m vertical; (d) Sample ④ at 6 m horizontal and 1 m vertical; (e) Sample ⑤ at 7.5 m horizontal and 1 m vertical; (f) Sample ⑥ at 7.5 m horizontal and 2.4 m vertical; (g) Sample ⑦ at 7.5 m horizontal and 3.8 m vertical; (h) Sample ⑧ at 7.5 m horizontal and 5.2 m vertical; and (i) original coke.
Fig 10.
EDS images of the coke at 2 m horizontal and 1 m vertical.
Fig 11.
EDS images of the coke at 7.5 m horizontal and 5.2 m vertical.
Fig 12.
Surface microstructure of edge coke at 2 m horizontal and -1 m vertical.
Fig 13.
Disappearance mechanism of edge coke.
Fig 14.
Surface microstructure of center coke at the 7.5 m horizontal and 1 m vertical position.
Fig 15.
Pulverization of center coke.