XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 1955
composition. The sample contains 33.64% iron
and 16.84% carbon by weight. Additionally, it has
a significant presence of gangue impurities, with
silica and alumina combined constituting around
20% of the sample.
2. Physical beneficiation techniques have been
employed to treat the blast furnace flue dust, focus-
ing on achieving particle liberation. This involves
processes to separate and enhance the concentra-
tion of valuable minerals in the sample.
3. Through experimentation, it has been determined
that a particle size of –25 microns is the most suit-
able for efficiently separating iron and carbon min-
erals. This size range enhances the effectiveness of
the beneficiation process.
4. Non-liberated particles in the coarser fraction
result in the loss of carbonaceous material during
froth flotation and ferruginous material during
magnetic separation.
5. By optimising various parameters, the study
achieved appreciable recovery rates. Specifically,
carbon recovery reached 77.6%, with a carbon
content of 52.0%, while iron recovery reached
86.6%, with iron content at 45.0% Fe(T).
6. The carbonaceous component generated during
the froth flotation study is identified as a valuable
material. It is suggested that this material can be
effectively utilised as a reductant in relevant indus-
trial processes.
7. The magnetic products obtained from the ben-
eficiation process are identified as potential feed-
stock. These can be employed in cold bonded
pelletization or composite pelletization processes,
indicating their suitability for further downstream
applications.
8. The microstructural investigations reveal the par-
ticle liberation behaviour and association of miner-
als with locked and unlocked particles.
9. The study advises against further reduction in par-
ticle size through grinding. This caution is based on
the understanding that a finer size could adversely
affect the agglomeration process of the material.
Maintaining a certain particle size is crucial for
ensuring the optimal performance of subsequent
processes.
Figure 21. Stereo microscopic images (a): (–75 +63 micron) (b): (–63 +45 micron) (c): (–45 +38 micron) (d): (–38 +25
micron) (e): (-25 micron)
composition. The sample contains 33.64% iron
and 16.84% carbon by weight. Additionally, it has
a significant presence of gangue impurities, with
silica and alumina combined constituting around
20% of the sample.
2. Physical beneficiation techniques have been
employed to treat the blast furnace flue dust, focus-
ing on achieving particle liberation. This involves
processes to separate and enhance the concentra-
tion of valuable minerals in the sample.
3. Through experimentation, it has been determined
that a particle size of –25 microns is the most suit-
able for efficiently separating iron and carbon min-
erals. This size range enhances the effectiveness of
the beneficiation process.
4. Non-liberated particles in the coarser fraction
result in the loss of carbonaceous material during
froth flotation and ferruginous material during
magnetic separation.
5. By optimising various parameters, the study
achieved appreciable recovery rates. Specifically,
carbon recovery reached 77.6%, with a carbon
content of 52.0%, while iron recovery reached
86.6%, with iron content at 45.0% Fe(T).
6. The carbonaceous component generated during
the froth flotation study is identified as a valuable
material. It is suggested that this material can be
effectively utilised as a reductant in relevant indus-
trial processes.
7. The magnetic products obtained from the ben-
eficiation process are identified as potential feed-
stock. These can be employed in cold bonded
pelletization or composite pelletization processes,
indicating their suitability for further downstream
applications.
8. The microstructural investigations reveal the par-
ticle liberation behaviour and association of miner-
als with locked and unlocked particles.
9. The study advises against further reduction in par-
ticle size through grinding. This caution is based on
the understanding that a finer size could adversely
affect the agglomeration process of the material.
Maintaining a certain particle size is crucial for
ensuring the optimal performance of subsequent
processes.
Figure 21. Stereo microscopic images (a): (–75 +63 micron) (b): (–63 +45 micron) (c): (–45 +38 micron) (d): (–38 +25
micron) (e): (-25 micron)