1560 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
detailed in Donda, 2003 Donda and Rosa, 2014) was
performed to determine the energy consumption param-
eter “k” for grinding control mesh. This allowed for pre-
cise calculations of specific energy consumption (E) using
the formula E =1/k·ln (F/P), where F and P represent the
percentage of control mesh retained on feed and product,
respectively.
After the grinding process, the samples underwent
desliming and flotation processes, as depicted in Figure 1.
Desliming was conducted in a 5,600 mL tank with a 10%
bypass control and a solids percentage of 33%, at pH 10.5.
The pulp was agitated for 5 minutes and then allowed to
settle for a minimum of 5 minutes and a maximum of 20
minutes. Subsequently, the supernatant containing the
slimes was decanted, while the settled material consti-
tuted the deslimed flow. It should be noted that a char-
acterization of the ROM was not conducted, instead, the
characterization of the desliming underflow was chosen to
enhance the understanding of the flotation process.
Reverse flotation tests were then conducted in three
stages (Rougher, Cleaner, and Scavenger) using a mechani-
cal cell with a 2.5L tank and a solid content of 60% at pH
10. For iron depression during flotation, cornstarch (Flokit
435), gelatinized with caustic soda at a ratio of 4:1 and
dosed at 600g/t, was utilized. The quartz collector used was
ether amine, commercially known as Flotigam 7100, sup-
plied by Clariant, dosed at 225 g/t SiO2. In cases where the
SiO2 content in the concentrate exceeded 2.5%, the test
was repeated with a higher collector dosage. This meticu-
lous testing protocol ensures a comprehensive evaluation of
processing parameters, thereby contributing to the optimi-
zation of mineral processing operations.
In addition to the aforementioned tests, chemical anal-
yses were conducted using X-ray fluorescence spectroscopy
on fused pellets, enabling a comprehensive assessment of key
Figure 1. Bench scale testing flowchart
detailed in Donda, 2003 Donda and Rosa, 2014) was
performed to determine the energy consumption param-
eter “k” for grinding control mesh. This allowed for pre-
cise calculations of specific energy consumption (E) using
the formula E =1/k·ln (F/P), where F and P represent the
percentage of control mesh retained on feed and product,
respectively.
After the grinding process, the samples underwent
desliming and flotation processes, as depicted in Figure 1.
Desliming was conducted in a 5,600 mL tank with a 10%
bypass control and a solids percentage of 33%, at pH 10.5.
The pulp was agitated for 5 minutes and then allowed to
settle for a minimum of 5 minutes and a maximum of 20
minutes. Subsequently, the supernatant containing the
slimes was decanted, while the settled material consti-
tuted the deslimed flow. It should be noted that a char-
acterization of the ROM was not conducted, instead, the
characterization of the desliming underflow was chosen to
enhance the understanding of the flotation process.
Reverse flotation tests were then conducted in three
stages (Rougher, Cleaner, and Scavenger) using a mechani-
cal cell with a 2.5L tank and a solid content of 60% at pH
10. For iron depression during flotation, cornstarch (Flokit
435), gelatinized with caustic soda at a ratio of 4:1 and
dosed at 600g/t, was utilized. The quartz collector used was
ether amine, commercially known as Flotigam 7100, sup-
plied by Clariant, dosed at 225 g/t SiO2. In cases where the
SiO2 content in the concentrate exceeded 2.5%, the test
was repeated with a higher collector dosage. This meticu-
lous testing protocol ensures a comprehensive evaluation of
processing parameters, thereby contributing to the optimi-
zation of mineral processing operations.
In addition to the aforementioned tests, chemical anal-
yses were conducted using X-ray fluorescence spectroscopy
on fused pellets, enabling a comprehensive assessment of key
Figure 1. Bench scale testing flowchart