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This work, carried out with a silicate-carbonate phosphate ore, aimed at studying the performance of depressant agents of different origins in the separation of apatite from the contaminants calcite and silicates by laboratory scale flotation. 2. Materials and methods
Froth Flotation (Sulphide & Oxide) ... There is a novel American patent addresses this problem - flotation separation of apatite from carbonates such as dolomite in phosphate bearing ores. ... my main problem is similarity of surface chemistry of apatite and calcite. I think important way is to depressing calcite by some selective calcite ...
the effect of calcite supernatant on its own flotation is also to depress it significantly in this pH range (see Figure 3) Thus, while both the supernatants of calcite and apatite depress calcite flotation under s~ilar pH conditions, their effect is minimal above pH 13. Also, the depressing effect of apatite
Zhou et al. reported that in the flotation separation of apatite from dolomite using conventional air bubble in the presence of the collector (Fatty acids), the contact angles of apatite and dolomite were 72.5° and 67.0°, respectively. However, when oil bubbles were used instead of air bubbles, the contact angles for apatite and dolomite were ...
Jun 01, 2019 In this study, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) was introduced as a depressant for the flotation separation of apatite from calcite. The micro-flotation test results showed that good floatability of both apatite and calcite were obtained at around pH 8.5 when using sodium oleate (NaOl) as collector.
separation of specific components, such as celestite, fluorite and calcite, gypsum and calcite, and apatite and calcite, with good results (Saitoh et al., 2007; Shariati et al., 2011); these results support the idea that the separation of the two minerals barite and calcite .
I had worked on apatite ores containing highly Siliceous, Calcitic& Dolomitic ores as impurities. Grinding pattern is first studied and liberation size obtained. Flotation at coarse grind, regrind of rougher concentrate, separation of apatite from impurities can also be tried.
Flotation recovery was studied in the pH range of 2–12 for apatite, and 6–12 for calcite (due to the alkaline nature of CaCO 3 it was not feasible to measure at a pH lower than 6) for a collector concentration of 2 × 10 −4 M with the data obtained presented in Fig. 2a and b respectively. Even though the structures of the collectors are relatively similar there are obviously considerable ...
The single and mixed binary mineral flotation experimental results prove the excellent selectivity of BHA in the apatite/calcite flotation separation. Zeta potential measurement results indicate a ...
separation between calcite and silicates. P 2O 5 recovery was strongly affected by the system pH, improved results being achieved at 10, in comparison with those obtained at pH 9. The mass and metallurgical balance of the best test using the route calcite flotation followed by apatite flotation, test T3, is illustrated in figure 4. The P 2O
Calcite-Apatite Flotation Columbia University. the effect of calcite supernatant on its own flotation is also to depress it significantly in this pH range (see Figure 3) Thus, while both the supernatants of calcite and apatite depress calcite flotation under s~ilar pH conditions, their effect is minimal above pH 13.
Dec 10, 2017· Flotation separation of scheelite from calcite is difficult due to the similarities in their surface properties. In this work, the flotation behavior of scheelite and calcite using oxidized paraffin soap (OPS), benzohydroxamic acid (BHA) and the mixed OPS/BHA collectors was investigated through micro-flotation experiments.
The proposed optimization of the flotation separation of scheelite from gangue minerals maximizes both the WO 3 grade and recovery. ... well as on apatite and calcite [20,23].
Request PDF on ResearchGate | Improved Flotation Separation of Apatite from Calcite with Benzohydroxamic Acid Collector | Apatite (Ca10(PO4)6F2) is .
Request PDF on ResearchGate | Molecular recognition in mineral flotation: Selectivity in apatite-calcite system | The present investigation aims to develop and distinguish mineral specific ...
Apatite, calcite, quartz, graphite The separation of apatite from calcite by flotation is extremely difficult due to similarity in the surface physicochemical properties for .
best performance fluorite mining flotation separator. Selective Flotation of Calcite from Fluorite A Semantic Scholar. Oct 26, fluorite and apatite. apatite and calcite separation by flotation. apatite and calcite separation by flotation Grinding Mill China Process for the separation of minerals by flotation It is surprising that . Get Price
Selective flotation of apatite from calcite using 2-phosphonobutane-1,2,4-tricarboxylic acid as depressant. Highlights•Good floatability of apatite and calcite were achieved using NaOl.•Flotation separation of apatite and calcite using PBTCA was attempted.•Calcite can be selectively depressed by PBTCA.•The depression mechanism can be explained by the matched-degree of reagent ...
In one aspect, the present invention is directed to a process for beneficiating a calcite-apatite ore which comprises subjecting a mixture containing discreet particles of apatite and calcite minerals to anionic flotation (froth flotation in an aqueous medium in the presence of an anionic flotation reagent such as fatty acid) at a pH of at ...
US2951585A - Separation of pyrochlore from calcite, apatite and silica - Google Patents ... Separation of pyrochlore from calcite, apatite and silica Download PDF Info ... silica apatite calcite containing Prior art date 1958-09-08 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal ...
ABSTRACTApatite (Ca10(PO4)6F2) is the most important phosphate mineral, and flotation is the main beneficiation method to separate apatite from its major gangue mineral calcite (CaCO3). Till date, ...
Reagents used in the flotation of phosphate ores: A critical review. ... fatty acids and their salts have been widely used as collectors in the apatite/calcite flotation separation due to their ...
flotation strategies are applied to separate apatite from calcite in phosphate ores from different deposits (igneous, sedimentary and metamorphic) around the world. MATERIALS AND METHODS Calcite samples Calcite samples from different origins and genesis (Table 1) were first purified and characterized, and then
Selective fatty acid flotation of carbonate gangue from sedimentary apatites was achieved under acidic pH's without a specific apatite depressant and without conditioning the pulp with the collector. Concentrates (35-38% P2O5, 0.8-1% MgO) with high recoveries (80-85%) were produced from Indian and Chinese dolomitic ores. The calcareous and/or dolomitic-siliceous phosphate ores of South ...
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