Back to Search
Start Over
An alternative and clean utilisation of refractory high-phosphorus oolitic hematite: P for crop fertiliser and Fe for ferrite ceramic
- Source :
- Journal of Cleaner Production. 299:126889
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- High-P oolitic hematite is recognised as one of the most refractory mineral resources because of the special oolitic structure. Conventional selective reduction roasting is characterised by high energy consumption and large greenhouse gas emissions. In this study, a clean utilisation of refractory high-P oolitic hematite via phase reconstruction was proposed to make the P for crop fertiliser and Fe for ferrite ceramic. Phase reconstruction indicated that the oolitic and finely disseminated structure was dramatically changed by the oxidisation roasting with Mn ore at 1100°Cā1250 °C. After reconstruction, 85 wt%ā90 wt% Fe and Mn were concentrated in the magnetic ferrite phase whilst 90 wt%ā100 wt% P, K, Ca, Si, Mg, and Al impurities were enriched in the nonmagnetic P-bearing tailings. After separation, the separated Mn ferrite and P-bearing tailings after activation could be used as ingredients in ceramic and fertiliser production. The as-purified ferrite showed good electromagnetism performance whilst almost all nutrients in the P-bearing tailings were activated via high-temperature melting and water quenching and can thus be readily absorbed by the crop roots. Moreover, the phase reconstruction mechanism and feasible granular fertiliser preparation from P-bearing tailings were discussed. All elements in the high-P oolitic hematite were utilised without emission of greenhouse gases.
- Subjects :
- Quenching
Materials science
Renewable Energy, Sustainability and the Environment
020209 energy
Strategy and Management
05 social sciences
Metallurgy
02 engineering and technology
Building and Construction
Hematite
Tailings
Industrial and Manufacturing Engineering
Impurity
visual_art
Phase (matter)
Ferrite (iron)
050501 criminology
0202 electrical engineering, electronic engineering, information engineering
visual_art.visual_art_medium
Ceramic
0505 law
General Environmental Science
Roasting
Subjects
Details
- ISSN :
- 09596526
- Volume :
- 299
- Database :
- OpenAIRE
- Journal :
- Journal of Cleaner Production
- Accession number :
- edsair.doi...........3925c05483387863a2e0635a341a8946