Flotation Separation of Chalcopyrite and Talc Using Calcium Ions and Calcium Lignosulfonate as a Combined Depressant

Abstract

As a major gangue mineral in sulfide ores, talc is difficult to separate from chalcopyrite in the flotation process due to its natural floatability, which affects the subsequent smelting process. In this study, the effects of calcium ions and calcium lignosulfonate (CLS) as a combination depressant for talc were systematically investigated along with the fundamental mechanisms. The results of our flotation tests showed the talc floating can be effectively depressed via the combination depressant effect of calcium ions and CLS over the pH range of 6–12. Measurements of the adsorption capacity, zeta potential, and Fourier transform infrared (FTIR) showed an enhancement of the adsorption capacity and adsorption strength of CLS on the talc surface after calcium ions were added. This result indicates that calcium ions adsorbed onto the talc, neutralized the negative charge on the surface of talc, generated the binding site with CLS, and formed the [talc-Ca2+/Ca(OH)+-CLS] system by strong adsorption. Further, the coverage rate of CLS on talc was significantly improved after the addition of calcium ions, as shown in the AFM imaging.

Artificial Weathering Test Methods of Waterborne Acrylic Coatings for Steel Structure Corrosion Protection

“…Titanium dioxide should be the primary inorganic filler (Table 1). Nonetheless, the recorded spectrum is not typical of the referenced compound [45,46] talc spectrum [47,48]. The most intensive band with a peak at 1004 cm −1 , similar to the peak at 666 cm −1 , originates from…”

“…Titanium dioxide should be the primary inorganic filler (Table 1). Nonetheless, the recorded spectrum is not typical of the referenced compound [45,46] talc spectrum [47,48]. The most intensive band with a peak at 1004 cm −1 , similar to the peak at 666 cm −1 , originates from the Si-O stretching vibrations, whereas the band at 3675 cm −1 originates from stretching of O-H surrounded by the MgMgMg triplet [49,50].…”

Next-Generation Lubricity in Deep Drawing: The Synergistic Benefits of PIL and Talc on Water-Based Lubricants

“…A weak band in 3660 cm −1 due to Mg 2 Fe II OH can indicate a trace of FeII contamination in octahedral talc sheets. The sharp peak in approximately 1016 cm −1 was related to Si-O stretching [41,42].…”

Enhanced removal of scaling cations from oilfield produced water by carrier mineral floatation

“…During the talcum flotation process, most of talcum (more than 95%) was recycled, even at low collector concentration. This was largely ascribed to the natural hydrophobicity of talcum and the enhanced adsorption capacity of collector on the scaling cations loaded talcum surface (Mai et al 2021). For quartz flotation, a recovery rate of 85.5% was achieved at 400 mg/L dosage.…”