A similar trend has been identified in the Na 2 O/SiO 2 system (Chaudary et al., 1997), although these slags are not stable in contact with carbon saturated iron melts (Gustafsson and Zhong, 1985).A lower p O₂ value is needed to oxidise V 3+ to V 5+ at higher basicity (Chaudary et al., 1997).Vanadium trioxide in the slag may react with …
DetailsWhen pH was 6.5 and PAE dosage was 20 mg/L, the selective separation of fayalite and magnetite can be achieved by reverse flotation without depressant. The results of zeta …
DetailsFroth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces …
DetailsIn Figure 5, M302 shows a high selectivity for the flotation separation of quartz from magnetite as pH increases. ...
DetailsThe iron ores consist of iron oxides mainly of magnetite (Fe 3 O 4 ... upgrading process development was required for increasing the grade of the ores to meet the demand of the iron and steel ...
DetailsThe flotation tests were carried out at pH 8.5 where the dodecyl amine (DDA) is as CH 3 ... Low uniform external magnetic fields significantly depressed the amine flotation of magnetite with no need of polysaccharide depressants such as starch, dextrin and CMC. ... The magnetic flotation hybrid separation process, which combines …
DetailsQuartz flotation tests were used to compare the flotation performance of UFA and SFA, which showed that UFA had excellent low-temperature floatability, and the flotation recovery of UFA was 35 ...
DetailsThe results showed that an optimized cobalt–sulfur concentrate with a cobalt grade of 2.08%, sulfur content of 36.12%, sulfur recovery of 85.79%, and cobalt recovery and 84.77% were obtained by ...
DetailsIn bench scale flotation tests with an artificial siliceous iron ore sample containing dolomite (2.5%), it was found that starch (200 g/t) was required for the effective flotation of the ore at pH 8, which produced concentrate with 55% Fe, 25% SiO 2 and 17.5% Fe in the tailing with 50 g/t of collector.
DetailsThe detrimental sulphur containing mineral is monoclinic pyrrhotite and its removal requires flotation. Previous published results related to pyrrhotite flotation from magnetite concentrate, e.g. on a magnetite deposit in Peru, only required the process to produce a final magnetite concentrate with a sulphur level below 0.4% w/w.
DetailsThe selective flotation process of pyrrhotite from its associated minerals is also reviewed in this paper. ... lime is commonly used for adjusting pulp pH in magnetite-pyrrhotites flotation separation. Apart from traditional ... it is recommended that sufficient mineral characterization and preparation is needed before the test to better ...
Detailsmeasurements made in triplicate. e zeta potential of quartz and magnetite particles was measured at pH 9,0 by varying the concentration (2, 5, 10, 20, 30, 50 mg/L) of the collectors (ether diamine ...
Details85.79%, and cobalt recovery and 84.77% were obtained by flotation process of one roughing, three sweeping, and three cleaning under roughing conditions, which employed pulp pH of 8, grinding fineness of < 0.074 mm occupying 80%, flotation concentration of 30%, and dosages of butyl
DetailsA similar study has been carried out to evaluate the influence of an external magnetic field produced by three solenoid coils wrapped around a micro-flotation column to inhibit magnetite flotation in quartz cationic flotation (Birinci et al., 2010). Although a magnetic field enhanced separation efficiency during quartz flotation from magnetite ...
DetailsMagnetite (Fe3O4) is an iron ore mineral that is globally mined especially for steel production. It is denser (5.15 g/cm3) than Earth's crust (~2.7 g/cm3) and is expected to accumulate at the ...
Detailsas a pH regulator. Deionized (DI) water was employed in all experiments. 2.3. Methods 2.3.1. Micro-flotation experiments Pure mineral flotation experiments were carried out in a 30 cm3 XFG flotation cell with the impeller speed of 1500 rpm at room temperature. During each flotation experiment, 2 g of samples composed of
DetailsFigure 6 shows the flotation response of magnetite recovery and desulfurization ratio as a function of pH with mixed collectors NaBX/(BX) 2 (α (BX) 2 = 40 %). The results clearly indicate that, with mixed collector, the recovery of magnetite increased from 96.66% to 99.33% when the pH value increased from 5.0 to 8.0.
DetailsThe complex mineralogy of dam copper flotation tailings leads to the need of grinding the rougher magnetite pellet feed to reach 80% of particles smaller than 20 µm (P 80) to improve magnetite liberation thus allowing to achieve a high-quality pellet feed concentrate (> 67.0 wt% of Fe, < 2.50 wt% of SiO 2, and < 2.00 wt% of Al 2 O 3).
DetailsSelective Process Route to Recover Magnetite from Chalcopyrite Dam ... the pH (8.0 ± 0.5) with no need for a depressor. The experi-ment was conducted in a bench Denver mechanic cell of 2.6 L. In this step, the recleaner tailings and the magnetite pellet ... flotation tailings Magnetite pellet feed. 3 tailings. 2)
Details2.1 Froth flotation process. Froth flotation is extensively used to enrich sulfide minerals (galena, chalcopyrite, sphalerite, molybdenite, and pentlandite) as well as non-sulfides such as phosphate minerals, iron ores, and fine coal [1, 2].The mineral ore is ground to fine particles of typically 10 to 100µm in diameter and mixed with water to …
DetailsIn flotation, pH control is a vital method to control selective mineral separation. A standard depressant that is used is an Alkali. An Alkali is any substance that when mixed with Acid will neutralize each other and form a new chemical substance called a BASE.
DetailsSince the flotation experiments were carried out at pH 9, the zeta potential of quartz and magnetite particles in the presence of a fixed amount of collector (30 mg/L) at pH 9 deserves special ...
Details1. Introduction. Pyrrhotite is one of the common harmful impurities in magnetite concentrate, which must be removed to meet the requirements of smelting (Arvidson et al., 2013, Cun et al., 2005, Yuan et al., 2022a).Pyrrhotite (Fe 1-X S, 0 < x less than 0.223) has a high magnetism close to magnetite, so it is unlikely to separate …
Detailson the flotatio n of magnetite as the flotation re covery of magnetite over the entire pH range is less t han 10%. It follows that the preferred pH for the flotation separation of
DetailsThe final flotation reagent regimes and conditions for each deposit were different being related to differences in mineralogy and grind size. The pH ranged from natural to pH of 4. Large dosage rates of xanthate collectors and long flotation times were needed. Flotation feed percent solids of between 45% and 50% w/w was required.
DetailsThe amount of activator CaCl 2 has been set at 30g/t to conform to literature values and pH rose to 12,2, very good flotation.
DetailsFlotation tests of single pure minerals showed that AAG enhanced quartz collection with minimal effect on magnetite. Mixed mineral flotation showed that by using AAG, Fe recovery of 92.1% and 64.5 ...
DetailsThe froth flotation process was done using Sodium hydroxide and Hydrogen tetraoxosulphate (VI) acid as hydrogen potential (pH) modifier within the range of 4,5,7,9 and 10.
DetailsFlotation tests of single pure minerals showed that AAG enhanced quartz collection with minimal effect on magnetite. Mixed mineral flotation showed that by using AAG, Fe recovery of 92.1% and 64.5 ...
DetailsUnder conditions of flotation separation of 2 × 10 −4 mol/L NaOL and pH 9.0, the zeta potential of magnetite particles increased from about −20 mV to about −25 mV. This indicates electrical double-layer repulsions between an air bubble and negatively charged magnetite particles during flotation separation from NaOL solutions.
DetailsFig. 4 a shows the floatability of magnetite or pyrrhotite as a function of pH. When using SCIL as the collector, the flotation recovery of pyrrhotite increased gradually with the increasing pH, but it began to decrease when pH > 8. At pH ∼ 7, the maximum recovery of pyrrhotite was 92.06 %. The pH of SIBX flotation pyrrhotite ranged from 4 to 6.
DetailsFlotation tests on pure samples illustrated that PGA has beneficial effects on magnetite depression (with negligible effect on quartz floatability) through reverse flotation …
DetailsThe synthesis of magnetite at basic pH, from ferrous salts, could follow two ways, one of them where Fe(OH) 2 is precipitated, then cubic Fe 3 O 4 and another one in which the synthesis of acicular α-FeOOH and α-Fe 2 O 3 precursors are included (Fig. 1).Many of the processes through which maghemite particles are prepared, need, as …
DetailsWith this process route, it was possible to produce a high-quality recleaner magnetite pellet feed, containing 68.00 wt% of Fe, 2.13 wt% of SiO2, 0.51 wt% of Al2O3, and 93.3 wt% of magnetite in ...
DetailsPE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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