Page 26 - Steel Tech India eMagazine Volume April 2022

VOL. 16 • NO. 3 • April 2022

roll crusher and further grinded through a ball mill to a Wave length dispersive X-ray fluorescence (WDXRF)
homogeneous size. analysis in PAN analytical. For the waste dusts
Characterization of Raw Materials proximate analysis is performed.
Sample less than 75 micron is subjected to X-ray a) Sinter Plant Dust
diffraction (XRD) analysis for phase determination in
Rigaku Ultima III with the help of cu-K radiation and XRD Analysis

(i) (ii)
Fig. 3: i) X-ray diffraction analysis plot for sinter plant air cleaning chamber (ACP) dust
ii) X-ray diffraction analysis plot for sinter plant gas cleaning chamber (GCP) dust

the above XRD plot shows, sinter plant dust contains hematite (Fe O ) as major phase. the dust collected from
2 3
sinter plant air cleaning chamber contains silica (SiO ) and lime (caO) as other prominent peaks whereas dust
2
from sinter plant gas cleaning chamber contains silica (SiO ) and magnetite (Fe O ) as minor prominent peaks.
2 3 4
this means that hematite is the major mineral phase present in sinter plant dust and iron (Fe) is the element which
can be extracted from these dusts.
WDXRF Analysis

Table 1: Showing the WDXRF analysis data of sinter plant dusts

Sl Name of Chemical Composition (%)
no. Sample
T.Fe SiO 2 Al O 3 P O 5 S Mn CaO MgO
2
2
1 Sinter AcP Dust 39.876 7.672 3.918 0.133 0.258 0.088 13.695 2.193
2 Sinter GcP Dust 40.849 9.981 3.62 0.104 0.584 0.096 10.696 2.307

Waste dusts from sinter plant contain total iron around 40 %, silica around 10 %, lime around 12 % and other
elements & compounds are in traceable amount as shown in the above table.

Proximate Analysis
carbon content in sinter plant AcP dust is 2 % and in sinter plant GcP dust is 2.75 %.
b) SMS Sludge

XRD Analysis

24 Steel tech