concentrations by ICP-OES. Table 3 illustrates the mass distribution of the HLS studies, indicating that sink products comprise approximately 99% of the feed sample, while 1.19% of the feed sample mass is classified as float products. Table 3 – Mass distribution of the HLS studies for each specific gravity interval pecific Gravity Interval Analysis (% weight) % of feed Sinks Floats Sinks Floats >2.89 31.69 36.33 31.31 0.43 2.89-2.80 5.54 33.43 5.48 0.40 2.80-2.70 7.31 29.61 7.22 0.35 2.70-2.60 55.46 0.63 54.81 0.01 Total 100.00 100.00 98.81 1.19 In the initial test conducted at an S.G. >2.89, a significant portion of the total sink product (31.69%) was recovered. The content of the various chemical components, including Fe2O3 (2.91%), CaO (2.51%), K2O (2.84%), SiO2 (48.48%), Al2O3 (20.84%), MgO (1.15%), and F (0.7%), validates the mineralogical analysis, indicating possibly the presence of minerals with high density such as amphibole, considering the presence of MgO. Also, epidote (Ca2Fe +3Al 2Si3O12(OH)) and diopside (CaMg(Si2O6)) can be present, as is commonly found in pegmatites (Novák et al., 2013). Additionally, minerals such as albite, microcline, and quartz could have been incorporated into the floated product, which accounted for 36.33% of the total floated output by mass. The second test, conducted at a S.G. 2.89-2.80, showed a lower proportion of material in the sink product (5.54%). However, there was an increase in the concentrations of Li₂O (1.06%), K₂O (3.88%), SiO₂ (65.05%), and F (0.89%), indicating that a substantial amount of spodumene and lithium mica (lepidolite) was sent to the sink product. Conversely, the Fe₂O₃ content remained relatively high at 2.82%, indicating that iron-bearing gangue minerals are still being recovered along with the valuable minerals. At S.G. 2.89-2.80, it was expected that the minerals albite, microcline, and quartz would be transferred to the floated product. In the test with S.G. of 2.80-2.70 and 7.31% sink product, the Li₂O content was 0.44%. This may suggest the presence of remnants of spodumene minerals or lithium mica, which exhibit a fluoride grade (F) of 0.32% or have experienced a reduction in density. Moreover, muscovite particles could also be present in this product due to their lower density, as indicated by a K₂O content of 2.66%. Consequently, it was anticipated that minerals such as albite, quartz, and microcline, known for their typical specific gravity, would float during this test. Finally, in the S.G. 2.70-2.60 test, a significant proportion of sink material (55.46%) was observed, but a low grade of Li2O (0.06%), Fe2O3 (0.28%), and F (<0.01) was observed. This suggests that most lithium- and iron-silicate mineral particles were recovered in previous tests. On the other hand, the higher Na2O (6.35%) and Si2O (77.68%) contents indicate that the 147
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