- Tytuł:
- The mechanism of $CaCO_3$ in the gas-based direct reduction of a high-phosphorus oolitic iron ore
- Autorzy:
-
Wu, Shichao
Li, Zhengyao
Sun, Tichang
Kou, Jue
Xu, Chengyan - Powiązania:
- https://bibliotekanauki.pl/articles/1446124.pdf
- Data publikacji:
- 2021
- Wydawca:
- Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
- Tematy:
-
high-phosphorus oolitic iron ore
gas-based direct reduction
magnetic separation
$Fe_3PO_7$
$CaCO_3$ - Opis:
- Gas-based direct reduction and magnetic separation process was applied in treating a high-phosphorus oolitic iron ore, of which phosphorus mainly occured as $Fe_3PO_7$ and apatite. The mechanism of $CaCO_3$ was investigated using XRD, SEM-EDS, and mineral phase analysis. Results showed that when no CaCO3 was added, most of the iron minerals were reduced to metallic iron, while $Fe_3PO_7$ was reduced to elemental phosphorus and mixed with the metallic iron particles. When a small amount of $CaCO_3$ was added, $CaCO_3$ preferentially reacted with $SiO_2$, $Al_2O_3$ and other components, preventing them from reacting with FeO and resulting in the increase of iron recovery. When the amount of $CaCO_3$ reached 25%, apatite was produced from the reaction of CaO and $Fe_3PO_7$, which could be later removed by grinding and magnetic separation.
- Źródło:
-
Physicochemical Problems of Mineral Processing; 2021, 57, 4; 117-124
1643-1049
2084-4735 - Pojawia się w:
- Physicochemical Problems of Mineral Processing
- Dostawca treści:
- Biblioteka Nauki
Artykuł