With regard to ilmenite recovery, several investigations used modified flotation technique to enhance the result [6,7,8,9]. Hu [6] applied sodium chlorite to oxidize Fe(II) ion to Fe(III) ion in ...
Small-scale flotation of ilmenite Four hydroxamates listed in Table 2 were employed as collectors in ilmenite flotation tests at dosages of 250 mg/L in the pH range from 2 to 12. MIBC as frother was used as required. Conditioning time (3 min) and flotation time (5 min) was kept constant. The experimental flowsheet is shown in Figure 1
Lead ions were introduced into the ilmenite-titanaugite flotation system in the presence of OHA. • Pb 2+ adsorbed on ilmenite surfaces via chemisorption and physisorption but only physisorption for titanaugite.. The Pb 2+-modified ilmenite exhibited superior activity for OHA adsorption.. Pb 2+ could selectively enhance the floatability of ilmenite rather than titanaugite …
Fig. 2 shows the variation of ilmenite flotation recovery as a function of sodium ferrate concentration at pH 6 and a sodium oleate's concentration of 1.75 × 10 −4 mol/L. By increasing the sodium ferrate concentration, the flotation recovery enhances and reaches its maximum at 2 × 10 −5 mol/L. When the sodium ferrate concentration was more than 2 × 10 −5 …
In this study, mechanism of lead ions on improving ilmenite flotation, promoting sodium oleate adsorption, and effecting ilmenite surface property were systematically …
The micro-flotation performance found that OAHD realized an efficient flotation of ilmenite under low concentration of 1.0 × 10 −5 mol/L under around pH 8.0, and the flotation recovery rate of …
Ilmenite, rutile and zircon have high driving forces for adsorption with ΔGads. = 20.48, 22.10, and 22.4 kJ/ mol respectively. The free energy of adsorption is 14.87 kJ/mol for monazite. Adsorption density testing shows that octanohydroxamic acid adsorbs on negatively charged surfaces of monazite and its gangue minerals which indicates ...
The flow chart of the exploratory trial on the ilmenite ore flotation is shown in Fig. 3.The raw ilmenite ore was firstly ground to the optimal fineness (d 80 = 74 μm) to insure the liberation of ilmenite mineral from the gangue minerals like titanaugite etc. 500 g of the ground raw ore were placed into a 1.5 L flotation cell (XFD-type flotation apparatus), then the …
The carrier flotation of fine ilmenite in the presence of HGB was investigated by micro flotation tests, X-ray diffractometer analysis, Fourier transform infrared (FTIR), optical microscope observation, and the extended …
Then the ilmenite concentrate is ground and magnetically separated. If it contains sulfide, the flotation method is added to select sulfide first, and then select fine-grained ilmenite. Hematite-Ilmenite: The beneficiation can only select the ilmenite mixed concentrate, and then use fire smelting to obtain pig iron and high titanium slag.
Combining the lead ion (Pb2+) and the benzyl hydroxamic acid (BHA) into a Pb—BHA complex has a marked effect on ilmenite flotation, which puts forward a new idea of developing combined reagents ...
Due to its high efficiency, ease of operation, and superior selectivity, flotation separation has emerged as a promising technique for the extraction of ilmenite from natural …
Sodium trans-2-nonene hydroxamate (NaTNA), a derivative of hydroxamic acid, was successfully synthesized as an effective collector for the flotation separation of ilmenite and forsterite.Micro-flotation results showed that NaTNA exhibits a superior flotation performance for ilmenite compared to sodium oleate. To elucidate the flotation process, the zeta potential, …
Ilmenite is an essential mineral for the extraction of titanium. Conventional physical separation methods have difficulty recovering fine ilmenite, and dressing plants have begun applying flotation to recover ilmenite. The interaction of reagent groups with Ti and Fe sites on the ilmenite surface dramatically influences the ilmenite flotation. However, the investigation …
Due to its high efficiency, ease of operation, and superior selectivity, flotation separation has emerged as a promising technique for the extraction of ilmenite from natural resources. In light of the solution chemistry of ilmenite, it is widely accepted that ferrous ions and ferrous hydroxy compounds serve as the primary active sites for collector adsorption across a …
ABSTRACT. China is rich in titanium resources, which accounts for more than 35% of the world. But, until today, the industrial TiO 2 recovery for ilmenite ore is slightly higher than 30% in the current pulsating high-gradient magnetic separation-flotation process (HGMS) so that a large amount of ilmenite value were lost in tailings. A centrifugal HGMS (CHGMS) …
In order to intensify the flotation separation of ilmenite from titanaugite, surface modification of mineral particles was carried out using carboxymethyl starch (CMS) by microflotation experiments, zeta potential measurements, Fourier transform infrared (FTIR) and atomic force microscopy (AFM) analysis. Microflotation results showed that CMS was a …
1. Introduction. Flotation is believed to be an efficient method for ilmenite separation in mineral processing (Pattanaik and Venugopal, 2018, Prakash et al., 2018).The key point for minerals flotation is to expand the hydrophobic difference between valuable minerals and gangue minerals (Zhai et al., 2020).Thus, the selection of flotation reagents, especially …
... Among the various mineral resources of weathering origin, the regolith-hosted ilmenite and iREEs deposits are worthy of attention because of their significant roles in the …
In a closed circuit flotation test, ilmenite concentrate is obtained with a TiO2 grade of 45.97% and a recovery of 76.32% by using PSSNa as a titanaugite depressant.
Selection of depressant and collectors strongly influenced by surface chemistry of the minerals [62,63]. ... as sodium oleate mainly interacts with Fe which results in ilmenite flotation, and ...
After modifying by cupric ions, ilmenite surface properties became more active and the adsorption amount of α-hydroxyoctyl phosphinic acid (HPA) increased. As expected, the flotation behaviour of ilmenite improved. XPS measurements verified the ability to establish a covalently attached HPA on the surfaces of ilmenite after Cu(II) activation.
In a closed circuit flotation test, ilmenite concentrate is obtained with a TiO2 grade of 45.97% and a recovery of 76.32% by using PSSNa as a titanaugite depressant. ... Editors select a small number of articles recently …
After magnetic treatment of the flotation water, the microflotation recovery of ilmenite increased by 5.4% from 74.9% to 80.3%. The adsorption amount of sodium oleate …
From the ilmenite flotation, it can be seen that the recovery of ilmenite flotation reached the peak at pH 8 when using Pb-BHA and Al-BHA, 88.85 % and 87.39% respectively, while the highest recovery of ilmenite flotation was only 36.88% when using BHA alone, indicating that the pre-mixing of Pb 2+ or Al 3+ with BHA improved the adsorption ...
Taking advantage of flotation tests and density functional theory (DFT), the selectivity of benzyl hydroxamic acid (BHA) and the adsorption mechanism of oleate and BHA on ilmenite were systematically investigated. …
The effects of Pb²⁺ ions on ilmenite flotation and adsorption of benzohydroxamic acid (BHA) as a collector were investigated using microflotation tests, zeta potential measurements, adsorption ...
The same sample of ilmenite and titanaugite as our previous research was obtained from Panzhihua in the Sichuan province (China) (Yang et al., 2016).After being hand-selected, crushed, ground and screened, the powder sample of − 75 + 38 μm fractions was used in the flotation tests.The samples used for the Fourier transform infrared (FTIR) analysis and …
Ilmenite Electric Separation. The electric separation method is mainly used to process the rough concentrate after gravity separation and magnetic separation containing non-conductive impurities and is mainly used for concentration operations.Pretreatments such as radiation irradiation and heating are required before electro-selection to ensure the regular progress of the electro …
Nonetheless, froth flotation is considered the most effective method for upgrading fine ilmenite ore, and proper selection of reagent schemes (collector and regulator) is extremely important [10].
Fig. 2 presents the flotation recovery of ilmenite and olivine-pyroxene before and after acid surface dissolution as a function of pH values. In the case of ilmenite, two recovery peaks appear in the flotation recovery curve before and after acid surface dissolution. The appearance of these two peaks is in good agreement with the previous studies (Fan and …
The flotation behavior of ilmenite at different pHs was studied. As shown in Fig. 2, when BHA was used as a collector in the absence of an Al 3+ activator, the recovery of ilmenite flotation increased and then decreased as the pH of the pulp changed from 3 to 11. The floatability of ilmenite in neutral and weak alkaline environments was higher than that in …
The analytical grade of sulfuric acid (H 2 SO 4), sodium hydrate (NaOH), sodium oleate (NaOL), and 2-amino-1,3-propanediol (APD), were purchased from Macklin Chemical Co, Ltd. Throughout the tests in this study, H 2 SO 4 and NaOH were employed as pH regulators, NaOL as a collector for ilmenite and titanaugite, and APD as a depressant for titanaugite …
Ilmenite disseminated grain size is relatively fine, and it must be finely ground to fully separate ilmenite from gangue and then produce fine-grained minerals, which deteriorates flotation. A novel method using buoyant carriers to improve the recovery of fine ilmenite in froth flotation was introduced in this study. Hydrophobized glass bubbles (HGB) as carrier …
Micro-flotation showed that Phen was a more effective collector for ilmenite flotation from pH 2 to 12 compared with benzohydroxamic acid (BHA), and the maximum increase in ilmenite recovery (~20%) was observed at pH 6. ... The selection of organic and inorganic acids whose conjugate bases possess good chelating capability in the pH buffer …
