Sintering Characteristics of Titanium Containing Iron Ores

Abstract

The effect of Ti-oxide on the sintering behaviour of iron ore has been studied by doping pure TiO2 to a sinter blend in laboratory tests. The results showed a considerable effect of TiO2 on sinter strength, where the tumble index increased with increasing TiO2% (up to 2.0%). However, doping more than 2.0% TiO2 to the sinter blend decreased its strength. The melting point of the sinter was also affected by increasing the TiO2 content, indicating a possible change in the coke consumption during industrial-scale sintering of Tibearing ores. Optical and electron microscopy studies of sinter structures confirmed a general improvement in the overall pore structure and sinter melt by increasing TiO2 content of the sinter blend up to 2.0%. An important feature of the sinter structure was the observation of perovskite phase formation and an increase in the volume fraction of this phase obtained by increasing TiO2. The formation of this perovskite phase was considered as an important reason for the reduction of the sinter melting point. Also, doping TiO2 to the sinter mix resulted in stabilizing and increasing the volume fraction of the larnite phase in the sinter structure.

Fundamentals of Silico-Ferrite of Calcium and Aluminium (SFCA) and SFCA-I Iron Ore Sinter Bonding Phase Formation: Effects of Titanomagnetite-based Ironsand and Titanium Addition

“…Similar events were observed in the in situ XRD data collected for the 1.3 and 13.8 mass% ironsand/SFCA-I mixtures. There was no evidence in the in situ XRD data for the formation of perovskite, which was the major Ti-bearing phase reported in the studies of Zhang et al, 16) Ren et al 20) and Dehghan-Manshadi et al 21) Minor amounts of perovskite may be below the detection limit of this laboratory-based experimentation. Figure 5 shows the results of the Rietveld refinementbased QPA for the 1.3 ( Fig.…”

“…20) This study also reported a small decrease in SFCA concentration of 45 to 42 mass% as the mass% of TiO 2 increased from 0 to 12 mass%. More recently, the effect of TiO 2 addition on the sintering behaviour of an iron ore sinter blend has been studied in laboratory tests by Dehghan-Manshadi et al 21) Their results showed a considerable effect of TiO 2 on sinter strength, where the tumble index increased with increasing TiO 2 (up to 2 mass%). However, addition of more than 2 mass% TiO 2 to the blend decreased its overall strength.…”

Automated optical image analysis of natural and sintered iron ore

“…To study the behavior of ore fines during sintering or to study the reaction of certain fine ore blends with certain textural types of nucleus particles, compacted cylindrical tablets may be prepared (Ware et al, 2013;Clout and Manuel, 2003;Dehghan-Manshadi et al, 2014). To study the behavior of ore fines during sintering or to study the reaction of certain fine ore blends with certain textural types of nucleus particles, compacted cylindrical tablets may be prepared (Ware et al, 2013;Clout and Manuel, 2003;Dehghan-Manshadi et al, 2014).…”

Preparation of BF Burden from Titanomagnetite Concentrate by Composite Agglomeration Process (CAP)

“…A projection of the liquidus surface of the CaO-Fe2O3-TiO2 ternary phase diagram. 31,32) tite concentrate agglomeration by CAP are as follows: the matrix feed with moisture content 8.0%, coke breeze dosage 3.23%, and composite basicity 2.0; the pelletized feed with size 8-12 mm and proportion 30%-40%. Under the optimized process parameters, yield 75.52%, tumbler index 62.87% and productivity 1.633 t•(m 2 •h) − 1 are achieved, which are 17.38%, 13.08% and 17.82% higher than those of TSP, respectively.…”

“…Figure 10 shows a projection of the liquidus surface of the ternary phase diagram 31,32) . In both TSP and CAP, titanomagnetite concentrate is the only raw material, in which Fe 2 O 3 /TiO 2 is fixed at about 86:14 if all Fe are oxidized to Fe 2 O 3 .…”