The effects of collector concentration on ilmenite flotation recovery at pH 6.0 are shown in Fig. 4. The flotation recovery of ilmenite increased rapidly with increasing concentrations of SPA or SPE. The ilmenite recovery reached 99.0% at 25 mg/L SPA and remained nearly unchanged when the collector concentration continued …
Effect of Pb 2+ on ilmenite flotation. The flotation recoveries of ilmenite in the presence and absence of Pb 2+ ions using BHA as a collector as a function of pH are shown in Fig. 2. Without the addition of Pb 2+ ions, the flotation recovery of ilmenite is only 6.05% at pH 4.5. Generally, the recovery rate increases with pH, reaching a …
Fig. 1 illustrates the flotation recovery as a function of concentration for the mixed Pb–BHA collector in a molar ratio of 1:2. As shown in Fig. 1, the recovery rate of ilmenite becomes distinct as more Pb–BHA is added.At a total concentration of 0.4 mM, the recovery rate reaches a maximum value of 33.4%. When this concentration is greater …
Fan and Rowson used the pre-treatment by microwave radiation to modify ilmenite surface properties prior to flotation and to improve ilmenite recovery [5], [7], [14], [15]. They used an ilmenite ore with 18% TiO 2 containing quartz and feldspar as the main gangue minerals.
There is a pressing need for research into the use of surface oxidation technologies for the recovery of ilmenite from real ores, specifically addressing the …
Ilmenite is freely dispersed in gangue minerals. At present, flotation separation is the most commonly utilized method to effectively separate ilmenite and associated gangue minerals (Xu et al., 2017, Zhai et al., 2020a). In general, two methods can be utilized to facilitate the flotation recovery of ilmenite.
For the first time, qualified ilmenite concentrate (TiO 2 grade > 46%) with TiO 2 recovery equal to that in industrial production was obtained only through HGMSCMF (without using flotation) with one roughing and three cleaning processes under the optimal conditions of MnCl 2 concentration 40%, applied induction 0.6 T and pulsating frequency …
The optimal pH for the ilmenite flotation was determined at around 9.0. At this point, BHA/2-OCT exhibited the strongest synergistic effect with 26.65 % recovery of ilmenite and 9.4 % of titanaugite, while BHA/3-OCT exhibited the weakest synergism with only 17.95 % recovery of ilmenite and 9.25 % of titanaugite.
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. Titanaugite kept at very low level of floatability (recovery < 5%) during micro-flotation test.
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.
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 reached about 94.2%, which was about 35.8% higher than that of NaOL. The morphology of ilmenite observed by AFM probed the self …
Effects of pH on ilmenite flotation recovery in the absence and presence of Pb 2+ ions, using . salicylhydroxamic acid (SHA) and benzohydroxamic acid (BHA) as collectors (C(BHA) = 2 × 10 −4 M,
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 reached about 94.2%, which was about 35.8% higher than that of NaOL. The morphology of ilmenite observed by AFM probed the self …
In contrast, the flotation recovery of ilmenite with the addition of BHA before grinding reached the highest flotation recovery of 70.5 % at a grinding time of 45 s. And at the same grinding time (45 s), the ilmenite flotation recovery with BHA added after grinding was only 36 %, which was 34.5 % lower than that of adding BHA before grinding.
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 ...
To investigate the effect of Pb 2+ on the flotation performance of ilmenite, micro-flotation tests of ilmenite are conducted under conditions of various pulp pH, Pb 2+ concentration, and sodium oleate concentration, and the results are shown in Fig. 2.As shown in Fig. 2 a, the flotation recovery of ilmenite increased initially and then …
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 reached about 94.2%, which was about 35.8% higher than that of NaOL. The morphology of ilmenite observed by AFM probed the self …
Nevertheless, the flotation recovery of ilmenite kept a high level (62–66%) at the CMS concentration below 7.5 mg L −1, but it experienced a nearly linear drop from 62.59% to 20.04% when CMS concentration was doubled. These results indicated that the CMS concentration played a critical role in the selective flotation separation between ...
For the first time, qualified ilmenite concentrate (TiO 2 grade > 46%) with TiO 2 recovery equal to that in industrial production was obtained only through HGMSCMF (without using flotation) with one roughing and three cleaning processes under the optimal conditions of MnCl 2 concentration 40%, applied induction 0.6 T and pulsating frequency …
A novel activation flotation method for ilmenite was developed in this study. Pb(NO 3) 2 was used as an activator to effectively and selectively improve ilmenite flotability. The results of the flotation tests for a massive ilmenite ore sample indicated that, when the dosage of Pb(NO 3) 2 was 60 g/tonne, ilmenite recovery increased from …
As seen from microprobe analysis and flotation results, the flotation recovery also has meaningful relation with the chemical composition of ilmenite and the content of substituted elements. There is positive correlation between flotation recovery and the content of MgO, V 2 O 3 and FeO while a negative correlation is observed …
Flotation results revealed that the flotation recovery of ilmenite significantly increased with the addition of BHA before grinding as compared to the conventional …
Therefore the higher flotation recovery of IL-F sample in weak alkaline solution can be due to the higher content of MgO and Fe 3+. Fe 3+, Mg 2+ and V 3+ ions also improve the flotation recovery by decreasing the IEP of ilmenite. Because the flotation recovery is inversely related to IEP value. Download: Download full-size …
Flotation recovery of ilmenite before and after acid surface dissolution as a function of pH (Sodium oleate: 3.65 × 10 −4 M, surface dissolution time: 15 min, concentration of acid: 10%) [47]. On the other hand, they investigated the variation of ilmenite contact angle before and after surface dissolution.
Flotation experiments showed that adding NaOL preferentially could improve the ilmenite recovery and reduce the titanaugite recovery, decreasing the H 2 SO 4 dosage in half. Microflotation and ICP analyses indicated that the total ions in pulp caused by the dissolution of H 2 SO 4 prevented the adsorption of NaOL on ilmenite surfaces, …
A novel method using buoyant carriers to improve the recovery of fine ilmenite in froth flotation was introduced in this study. Hydrophobized glass bubbles …
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 flotation recoveries of ilmenite in the presence and absence of Pb 2+ ions using BHA as a collector as a function of pH are shown in Fig. 2.Without the addition of Pb 2+ ions, the flotation recovery of ilmenite is only 6.05% at pH 4.5. Generally, the recovery rate increases with pH, reaching a maximum of about 45% at pH 5.5.
The ilmenite recovery for the untreated ore sample using microwave radiation was only 65.4% in the column cell flotation, and the grade of ilmenite concentrate was only 32.3% TiO 2. Les principaux problèmes de flottation de l'ilménite avec équipement de flottation à hélice incluent le pauvre comportement de flottation de l'ilménite ...
Studies have shown that lead ions can enhance ilmenite flotation recovery greatly independent of collector type (sodium oleate vs. benzohydroxamic acid). Table 6 summarizes flotation results when different collectors and introduced-ions are used in …
