1862 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
The darker areas in Figure 11 (h) contained elements of
Mg and O, and almost no Fe, it was speculated that these
particles were suanite. Therefore, the structure of the origi-
nal particles where boron, magnesium, and iron minerals
coexisted closely was destroyed by hydrogen.
Pore Characteristics
The difference in pore structure was verified using a spe-
cific surface area analyzer (Asap2460, Micromeritics, USA).
Figure 12 illustrates the N2 adsorption and desorption
isotherms of the samples. The pore size distribution was
obtained by the Barrett-Joyner-Halenda (BJH) method
(Pang et al., 2021).
By comparing the isotherms and hysteresis loops clas-
sified by the International Union of Pure and Applied
Chemistry (IUPAC), the isotherms of samples were IV
category with H3-type hysteresis loops, indicating that
the pores were flat slits, cracks or wedge-shaped structures
(Wang et al., 2021). According to the pore size distribu-
tion results, the pores of the raw material and reduced
products were mainly mesoporous (2–50 nm). The satura-
tion adsorption of the raw material was only 1.76 cm3/g,
Figure 11. SEM and EDS results at 700 °C–800 °C: (a), (b), (c) 700 °C (d), (e), (f) 750°C (g), (h), (i) 800 °C (j–m) Map
scanning results of (h)
The darker areas in Figure 11 (h) contained elements of
Mg and O, and almost no Fe, it was speculated that these
particles were suanite. Therefore, the structure of the origi-
nal particles where boron, magnesium, and iron minerals
coexisted closely was destroyed by hydrogen.
Pore Characteristics
The difference in pore structure was verified using a spe-
cific surface area analyzer (Asap2460, Micromeritics, USA).
Figure 12 illustrates the N2 adsorption and desorption
isotherms of the samples. The pore size distribution was
obtained by the Barrett-Joyner-Halenda (BJH) method
(Pang et al., 2021).
By comparing the isotherms and hysteresis loops clas-
sified by the International Union of Pure and Applied
Chemistry (IUPAC), the isotherms of samples were IV
category with H3-type hysteresis loops, indicating that
the pores were flat slits, cracks or wedge-shaped structures
(Wang et al., 2021). According to the pore size distribu-
tion results, the pores of the raw material and reduced
products were mainly mesoporous (2–50 nm). The satura-
tion adsorption of the raw material was only 1.76 cm3/g,
Figure 11. SEM and EDS results at 700 °C–800 °C: (a), (b), (c) 700 °C (d), (e), (f) 750°C (g), (h), (i) 800 °C (j–m) Map
scanning results of (h)