Figures & data
Table 1. Chemical compositions and proportion of raw materials in mixture (mass %).
Figure 1. Schematic diagram for PM sampling from sintering flue gas.
Figure 2. Typical trends of flue gas temperature in sintering process.
Figure 3. Typical changes of sinter layers during sintering process. (a) Gradual forming process of combustion layer and drying & preheating layer; (b) gradual forming process of overwetted layer; (c) formed overwetted layer; (d) gradual disappearing process of overwetted layer; (e) gradual disappearing process of drying & preheating layer; (f) gradual disappearing process of combustion layer.
Figure 4. Emission property of SO2 and PM2.5 during sintering process.
Figure 5. SEM-EDS of perfect crystallized and nonperfect crystallized CaSO4 crystals. (a) Morphology of perfect crystallized CaSO4 crystals; (b) EDX spectrum of perfect crystallized CaSO4 crystals; (c) morphology of nonperfect crystallized CaSO4 crystals; (d) EDX spectrum of nonperfect crystallized CaSO4 crystals.
Figure 6. SEM-EDS of CaSO4-assembled particles. (a) EDX spectrum of selected area 1; (b) EDX spectrum of selected area 2.
Figure 7. SEM-EDS of CaSO4-K2SO4 hybrid crystals.
Figure 8. SEM-EDS mapping of CaSO4-K2SO4 hybrid particles.
Figure 9. SEM-EDS mapping of CaSO4 particles.
Figure 10. Size distributions of basic fluxes (<0.5 mm).
Table 2. Removal ratio of K with increasing the ratio of coke breeze.
Figure 11. Proposed formation and release mechanism of SO2-related PM2.5.
