The tailings were composed of barite, quartz and carbonates minerals (e.g., calcite, dolomite). When the flotation reagent scheme included 200 g/t of SS and one drop of Aerofroth 76 in additional to the 700 g/t of NaOl, barite recovery was improved to more than 80 % (Deng, 2019). Oleic acid was also used in barite flotation.
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Under the conditions of pH 8.0, styrene phosphonic acid (SPA) 80 mg/L, and HCA 6 mg/L, the flotation recovery of cassiterite and calcite was 82.01% and 19.18%, respectively, in the flotation ...
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The flotation recovery of these three minerals increased significantly with increasing pH, and the recovery was above 90% at pH 8–10. The adsorption. Conclusions. In this study, a new method of acid leaching and reverse flotation for fluorite concentrate was developed and applied based on mechanism analysis and bench-scale tests to …
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Each reagent was allowed to react for 3 min, and each test was repeated for 3 times. The concentrate and tailings were collected, dried and weighed for ... 8.8 to 7.5. This change is mainly due to the adsorption of slow-released F-, which produce the inhibiting effect on calcite flotation. Download : Download high-res image (252KB) …
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Flotation separation of apatite and calcite is difficult due to the same surface properties and depressant is essential. As shown in Fig. 2, the recovery of apatite increases from 69.74% to 85.03% when the pH increases from 6.0 to 8.0.Then the apatite recovery obviously decreases to 40.95% when the pH reach to 11.0.
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Froth flotation is a common method to concentrate fluorite from ores [5], [6]. During the flotation separation process, the difference in surface hydrophobicity between valuable and gangue minerals is important. ... Microflotation results showed that the high recoveries of both fluorite and calcite flotation could be obtained when the …
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After adding NaF, the grade of fluorite in the concentrate increased from 35.26% to 61.08%, and the grade of calcite decreased from 64.74% to 38.92%, indicating that the addition of a fluoride ion can …
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Flotation experiments illustrate that PASP can selectively inhibit calcite but exert little influence on fluorite flotation. In the real ore containing 20.12% CaF 2 and 6.71% CaCO 3, a concentrate containing 93.56% CaF 2 with a recovery of 57.82% is obtained in the closed-circuit flotation test.
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Application of Diethylenetriaminepenta pentasodium salt as an eco-friendly depressant to effectively improve the flotation separation of scheelite and calcite. Diethylenetriaminepenta (methylene-phosphonic acid) pentasodium salt (DTPMPA), an eco-friendly reagent, was tried for the first time as a depressant for flotation separation of …
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The grade of scheelite was 24.35 %, and the grade of calcite was 74.90 % in the mixed minerals. In the flotation concentrate without SBC, the grades of scheelite and calcite reached 27.10 % and 72.88 %, respectively, while the recovery of scheelite and calcite was 88.22 % and 77.11 %, respectively.
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calcite and apatite materials. To determine the amount of calcite recovered from the flota-tion experiments, the concentration and grade of calcite in the samples were compared. The variables W1 and W2 in Equation (1) represent the masses (g) of the concentrate and tailings, respectively. In Equation (2), g1 (%) and c (%) are the yield …
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Abstract. Fluorite is an important strategic mineral. In general, fluorite ores will contain a certain amount of calcite gangue mineral. Thus, they need to be …
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Microflotation experiments demonstrated the selectiveness of the reverse calcite flotation, obtaining a concentrate product with a maximum of 84 % calcite grade. The …
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At present, the research on flotation separation of cassiterite and gangue minerals is mainly focused on the development of new collectors or depressants, while the research on combined depressants is rare. In this study, the flotation separation of cassiterite and the typical gangue mineral, calcite, was investigated using the metal …
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Strengthening the flotation separation of scheelite and calcite in the room temperature roughing stage can improve the grade of rough concentrate. The improvement of the rough concentrate grade was conducive to reducing the heating cost and reagent cost of the high temperature cleaning stage, making the entire scheelite flotation …
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After the sulfuric acid pretreatment, the grade of calcite concentrate reduced from 42.62% to 23.17%, and the recovery reduced from 58.67% to 22.39%, indicating that the sulfuric acid pretreatment can significantly improve the flotation separation effect of fluorite and calcite. ... This may account for the significant decrease in calcite ...
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Following the completion of each test twice, the average value was used to determine the final result. For artificially mixed minerals (1 g of smithsonite and 2 g of calcite) flotation tests, chemical titration was used to evaluate the grade of concentrate and tailings respectively, to calculate the recovery of each product. 2.3.
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In this study, a collector mixture of 733 and MES (sodium fatty acid methyl ester sulfonate) demonstrated a high selectivity for the flotation of scheelite from calcite and fluorite. An optimal mass ratio 4:1 of 733:MES was found, producing a 65.76% WO 3 concentrate grade with a recovery of 66.04% from a feed material containing only …
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After flotation, the concentrate and tailings were both collected, dried, weighed, and assayed for calculation of the recovery and grade. In single mineral flotation, the recovery was calculated from the mass ratio of concentrate to raw ore. ... For calcite flotation, the recovery of calcite first increased, then reached the plateau and ...
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Calcite is activated and floated into the froth concentrate while the sericite, quartz, and other silicates are depressed and rejected into the flotation tailing. The froth from the last 2 or 3 cells of the "Sub-A" calcite flotation circuit may be recycled, if desired to maintain grade and provide a final refuse low in calcite.
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Calcite is therefore also depressed when CA is used as a reverse flotation depressant for high-calcite-type fluorite ores, which leads to high calcite content in the fluorite concentrate. To avoid this, surface modification can be applied to increase the surface differences between fluorite and calcite, and the latter can be activated to ...
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The influences of depressant dosage in barite and calcite flotation (pH 8.5, NaOl: 1.2×10 −4 mol/L). ... As exhibited, the grade of BaSO 4 was 80.15% in concentrate with the individual NaOl which closed to that of BaSO 4 in raw feed (the dotted line represented the BaSO 4 grade in the raw feed), ...
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The flotation test results showed that 60 mg/L SMKL had a significant influence on depressing calcite flotation, while it had a slight effect on scheelite flotation. Furthermore, it enhanced the WO 3 grade of the concentrate in the artificial mixed ore to 62.02% with a recovery rate of 80.37%. The contact angle and zeta potential showed …
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The flotation separation of artificially mixed minerals afforded the concentrate with 69.26% REO grade and 89.49% REO recovery, indicating the OMHA has excellent selectivity of bastnaesite over calcite.
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Abstract. The effective flotation separation of smithsonite and calcite has always been a thorny problem due to their relatively similar physicochemical property. Developing efficient and selective depressant is the key to address this obstacle. In this study, sodium phytate (SP) was introduced as a novel depressor for high-efficient …
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After curdlan was added, the flotation recovery of fluorite decreased slightly and remained above 80%. The calcite was strongly depressed and its flotation recovery decreased to less than 5%. The results showed that the flotability of fluorite and calcite was significantly different with the addition of curdlan.
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The microflotation results in this study showed that the collector DDHA had better performance than BHA and OHA for the flotation of bastnӓsite from calcite. In the flotation of mixed minerals (1:1 mass ratio of bastnӓsite to calcite), a bastnӓsite concentrate with 86.19% grade and 85.91% recovery could be achieved when using …
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Abstract. Calcite is a semi-soluble mineral that can be considered one of the main problematic gangue phases for several different types of valuable sulfides and …
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The recovered magnesite concentrate comprised 70.1% magnesite and 21.7% dolomite, with a dolomite and calcite recovery of almost 68% in the recovered froth. It should be noted that the flotation pH was alkaline, justifying the limited achievement using Atrac 50L, as it exhibits greater selectivity in an acidic environment (Kurylak, 2020).
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The flotation process currently considered for apatite concentration from the Santa Quitéria phosphate deposit (Brazil), involves bulk flotation of apatite and calcite with anionic collector at ...
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In the flotation separation of fluorite from calcite and celestite, the Al 2 (SO 4) 3 and acidified water glass mixed depressant increased the grade and recovery of …
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Smithsonite, dolomite, and calcite are carbonate minerals. The crystal structures and spatial distribution characteristics of their common surface metal sites are similar, leading to difficulty in the flotation separation of smithsonite from these carbonate gangues. In this paper, the floatability of smithsonite, dolomite, and calcite in sodium …
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Effective separation between bastnaesite and calcite can be realized. The concentrate with 68.82 % REO grade and 90.23 % REO recovery was obtained with 3 × ... a novel hydroxamic acid OIBHA was used as the collector in the flotation separation of bastnaesite from calcite. Single mineral flotation results demonstrated that OIBHA …
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