Abstract
In this paper, a surfactant, atlox4862 (formaldehyde condensate of methyl naphthalene sulfonic sodium salt) (MF), was introduced as a depressant for reverse flotation separation of sericite from graphite. Natural flake graphite has a strong hydrophobic property. After interacting with MF, the graphite became moderately hydrophilic. The flotation results showed that MF had a depressing ability for both sericite and graphite and that the flotation separation of sericite from graphite was attributed to the different declining levels of recovery between graphite and sericite with increased MF concentration. For a pulp pH of 8 and a MF concentration of 250 mg/L, the recovery rates of sericite and graphite were 89.7% and 11.3%, respectively. The results of the FTIR spectra and zeta potential measurements demonstrated that the interaction of MF with graphite and sericite is mainly through electrostatic attraction. MF was preferred to adsorb on the surface of graphite, decreasing its zeta potential and improving its hydrophilicity more than that of sericite.
Highlights
Graphite is a type of widely used non-metallic material; large, flaky graphite is an irreplaceable raw material in many industries [1]
Batch flotation experiments of single mineral and artificial mixtures of flaky graphite–sericite and contact angle measurements were conducted to verify the feasibility of reverse flotation separation of sericite from graphite by using a Gemini surfactant: MF
FTIR spectra and zeta potential measurements were conducted to confirm the mechanism of MF reaction with sericite and graphite
Summary
Graphite is a type of widely used non-metallic material; large, flaky graphite is an irreplaceable raw material in many industries [1]. By doing so, gangue minerals are ground finely These fine/ultrafine gangue mineral particles affect sub-flotation processes in recovering valuable minerals based on true flotation and lead to grade reduction through mechanical entrainment. The entrainment behavior of sericite in microcrystalline graphite flotation in certain base metal ores [9]. Studies on the entrainment mechanism have been method has been found to control entrainment in graphite flotation. Bartrum Bartrum introduced the use of as a depressant for graphite in lead zinc ore graphite concentrate. ThisMF study used MF (formaldehyde methyl naphthalene sulfonic sodiumsulfonic salt) as asodium depressant during flotation recovery condensate of methyl naphthalene salt) for as graphite a depressant forthe graphite during the of sericite. The formula formula and and name name of of the depressant agent formaldehyde condensate of methyl naphthalene sulfonic sodium salt (MF). Performed to explain the adsorbing and depressing mechanism of MF
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