3680 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
as can be seen from the results in Table 9 and Table 10.
Both ultra-purity and high-purity iron concentrate was
respectively produced that is suitable for use as a high-qual-
ity direct reduced iron raw material. The high-purity iron
concentrate can also be used directly in powder metallurgy,
magnetic materials, and environmental protection fields.
Direct Reduced Iron Preparation Experiment
The ultra-purity and high-purity iron concentrations pre-
pared through the process summarized in Figure 7 were
used to produce direct reduced iron (DRI), respectively
described as Test 1 and 2. It can be seen from Table 11 that
the total Fe grade of DRI Test 1 is as high as 98.48%, and
the metallization is 96.18%. This product is high-quality
direct reduced iron and can be used as a diluent for smelt-
ing clean steel or high-quality steel residual elements. DRI
Test 2 has a lower impurity content and can also meet the
standards of high-quality direct-reduced iron.
Further, pure iron was prepared through electric fur-
nace smelting using two types of direct reduced iron as raw
materials. It can be seen from Tables 13 and 14 that the
total Fe grade of pure iron prepared from the two products
Table 9. Chemical composition analysis results of ultra-purity iron concentrate
Composition Total Fe SiO2 S P Al2O3 CaO
Contents 71.99 0.11 0.002 0.005 0.11 0.10
Composition Mn Ti Cr Acid Insoluble Matter
Contents 0.043 0.044 0.032 0.15
Table 10. Chemical composition analysis results of high-purity iron concentrate
Composition Total Fe SiO2 S P Al2O3 CaO
Contents 70.31 1.96 0.035 0.005 0.14 0.17
Composition MgO Na K
Contents 0.05 0.01 0.01
Table 11. Chemical composition analysis results of direct reduced iron 1 (Ultra high-purity iron concentrate)
Composition Total Fe MFe S P CaO
Contents 98.48 94.72 0.0066 0.0014 0.0196
Composition MgO Ti Mn C Metallization
Contents 0.0067 0.011 0.004 0.58 96.18
Table 12. Chemical composition analysis results of direct reduced iron 2 (High purity iron concentrate)
Composition Total Fe MFe S P CaO
Contents 98.82 97.18 0.0083 0.0014 0.0238
Composition MgO Ti Mn C Metallization
Contents 0.0183 0.045 0.011 0.016 98.34
Table 13. Chemical composition analysis of pure iron 1 (Ultra high-purity iron concentrate)
Composition Total Fe C Si S P Ca Mg Al Mn Ti
Contents 99.94 0.020 0.001 0.0068 0.0006 0.0036 0.001 0.0021 0.006 0.006
Composition Sn Cu Nb Cr Ni Mo V Pb B Co
Contents 0.001 0.000 0.002 0.008 0.007 0.002 0.001 0.000 0.001 0.002
Table 14. Chemical composition analysis of pure iron 2 (High purity iron concentrate)
Composition Total Fe C Si S P Ca Mg Al Mn Ti
Contents 99.92 0.017 0.001 0.0092 0.0003 0.0033 0.001 0.0029 0.004 0.006
Composition Sn Cu Nb Cr Ni Mo V Pb B Co
Contents 0.001 0.002 0.006 0.010 0.007 0.003 0.001 0.002 0.001 0.005
as can be seen from the results in Table 9 and Table 10.
Both ultra-purity and high-purity iron concentrate was
respectively produced that is suitable for use as a high-qual-
ity direct reduced iron raw material. The high-purity iron
concentrate can also be used directly in powder metallurgy,
magnetic materials, and environmental protection fields.
Direct Reduced Iron Preparation Experiment
The ultra-purity and high-purity iron concentrations pre-
pared through the process summarized in Figure 7 were
used to produce direct reduced iron (DRI), respectively
described as Test 1 and 2. It can be seen from Table 11 that
the total Fe grade of DRI Test 1 is as high as 98.48%, and
the metallization is 96.18%. This product is high-quality
direct reduced iron and can be used as a diluent for smelt-
ing clean steel or high-quality steel residual elements. DRI
Test 2 has a lower impurity content and can also meet the
standards of high-quality direct-reduced iron.
Further, pure iron was prepared through electric fur-
nace smelting using two types of direct reduced iron as raw
materials. It can be seen from Tables 13 and 14 that the
total Fe grade of pure iron prepared from the two products
Table 9. Chemical composition analysis results of ultra-purity iron concentrate
Composition Total Fe SiO2 S P Al2O3 CaO
Contents 71.99 0.11 0.002 0.005 0.11 0.10
Composition Mn Ti Cr Acid Insoluble Matter
Contents 0.043 0.044 0.032 0.15
Table 10. Chemical composition analysis results of high-purity iron concentrate
Composition Total Fe SiO2 S P Al2O3 CaO
Contents 70.31 1.96 0.035 0.005 0.14 0.17
Composition MgO Na K
Contents 0.05 0.01 0.01
Table 11. Chemical composition analysis results of direct reduced iron 1 (Ultra high-purity iron concentrate)
Composition Total Fe MFe S P CaO
Contents 98.48 94.72 0.0066 0.0014 0.0196
Composition MgO Ti Mn C Metallization
Contents 0.0067 0.011 0.004 0.58 96.18
Table 12. Chemical composition analysis results of direct reduced iron 2 (High purity iron concentrate)
Composition Total Fe MFe S P CaO
Contents 98.82 97.18 0.0083 0.0014 0.0238
Composition MgO Ti Mn C Metallization
Contents 0.0183 0.045 0.011 0.016 98.34
Table 13. Chemical composition analysis of pure iron 1 (Ultra high-purity iron concentrate)
Composition Total Fe C Si S P Ca Mg Al Mn Ti
Contents 99.94 0.020 0.001 0.0068 0.0006 0.0036 0.001 0.0021 0.006 0.006
Composition Sn Cu Nb Cr Ni Mo V Pb B Co
Contents 0.001 0.000 0.002 0.008 0.007 0.002 0.001 0.000 0.001 0.002
Table 14. Chemical composition analysis of pure iron 2 (High purity iron concentrate)
Composition Total Fe C Si S P Ca Mg Al Mn Ti
Contents 99.92 0.017 0.001 0.0092 0.0003 0.0033 0.001 0.0029 0.004 0.006
Composition Sn Cu Nb Cr Ni Mo V Pb B Co
Contents 0.001 0.002 0.006 0.010 0.007 0.003 0.001 0.002 0.001 0.005