Results of work aimed at optimizing depression of phosphate oölites during inverse flotation of the carbonate gangue with sodium oleate are reported in Part 4. ... The flotation of calcite and phosphate oölites, using both anionic and cationic collectors, is discussed in the third part. It is shown that selective recovery could be obtained ...
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Apatite is the valuable mineral in phosphate ores. It is classified as a sparingly soluble salt-type mineral. A common group of minerals found with apatite as gangue are clay, dolomite, quartz and calcite [1, 2]. The flotation of phosphate ores containing siliceous gangue is successful due to the different surface properties of silicates and ...
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The way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment process consists of …
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Flotation test results indicate that in a sodium oleate (NaOL) system, GLDA selectively inhibits the flotation of calcite. Under optimal conditions (slurry pH=9.20, GLDA 15 mg/L, and NaOL 140 mg/L), a flotation concentrate with an MgO grade of 46.21 %, CaO grade of 1.39 %, and an MgO recovery rate of 73.17 % was achieved.
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The results show that a single stage for flotation of phosphate or calcite is not enough to obtain high grade concentrates. Among three different processes for carbonate flotation, the results reveal better selectivity when phosphoric acid is used as depressant for phosphate. ... The depression of phosphate in acid media is possibly due to the ...
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The objective of this study was to examine the selective depression mechanism of gypsum in the flotation separation of apatite from calcite. The flotation behavior of apatite and calcite before and after the addition of gypsum and the effective components of gypsum in solution were investigated via micro-flotation experiments.
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In this study, potassium oleate and potassium dihydrogen phosphate (KH2PO4) were used as collector and depressant, respectively. Micro-flotation experiments were …
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Apatite, a group of phosphate minerals, widely used in medicine, environmental protection materials, national defense, ... Carboxymethyl chitosan exhibited selective depression for calcite flotation. The apatite and calcite with …
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4 on calcite, electrokinetic properties of calcite have been measured in relation to pH and in the absence and presence of KH 2PO 4. Moreover, thermodynamic calcula-tions were used to rationalize the reasons for calcite depression as well as the adsorption mechanism of KH 2-PO 4 onto the calcite surface. Keywords Calcite Flotation Potassium ...
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However, natural phosphate ores are unable to meet the needs of the market grade because of the presence of gangue minerals. Therefore, the phosphate rock resources must be improved with further processing. ... Carboxymethyl chitosan exhibited selective depression for calcite flotation. The apatite and calcite with recovery of 87.8% and 10.1% ...
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Froth flotation is a commonly utilized beneficiation technique for effectively separating apatite from other gangue minerals, such as calcite. It is difficult to achieve good separation with fatty acid collectors due to their similar interactions with apatite and calcite. In this work, sodium N-lauroyl sarcosinate (SNLS) was used as the collector for the selective …
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The flotation response of malachite, calcite and quartz to bis (2-ethylhexyl) phosphate (DEHPA), dibutyl phosphate (DBP) and tributyl phosphate (TBP) was evaluated by micro-flotation experiments. The results showed that DEHPA exhibited an impressive flotation selectivity for malachite against calcite/quartz in the pH range of 6.0–9.0 and ...
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Abstract: In order to selectively separate smithsonite and calcite using potassium lauryl phosphate as collector and reveal the depression mechanism, the approaches of micro-flotation and zeta potential measurements were adopted. The effects of sodium hexametaphosphate (SHMP), water glass (WG), carboxymethyl cellulose (CMC) and …
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The effects of apatite and calcite supernatants on calcite flotation is to depress the flotation markedly in the neutral to alkaline pH (pH < 13) range.
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enologically related to flotation depression below pH 13.0. Fig. 7- Effect ofK2C03 addition on oleate flotation of calcite Apatite Flotation The pH dependence of apatite flotation at 2 X 10- 6 kmol/rnf potassium oleate is shown in Fig 8. The level of oleate in this case is almost two orders of magnitude lower
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As semi soluble salts minerals (included in non-sulphide ores), phosphate rock is the principal natural resource exploited in the mining industry for the extraction of phosphorus [4, 6].It is predominantly composed of apatite, which constitutes the valuable fraction, as well as carbonates (calcite, dolomite), silicates (clays and quartz) and other minerals, which are …
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This paper presents a comprehensive study on the selective flotation of a multi calcium-bearing minerals ore, focusing on the efficient removal of dolomite and calcite …
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Depression mechanism of acid for flotation separation of fluorapatite and dolomite using ToF-SIMS and XPS ... Selective flotation of brucite from calcite using HEDP-4Na as an inhibitor in a SDS system. ... reverse flotation dolomite from phosphate ores is used in many plants while sulfuric/phosphoric acid were used as depressants for apatite ...
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Phosphate ore is an important strategic mineral resource. The efficient utilization of phosphate resources faces challenges such as low grade of raw ore and difficulty in discharging gangue minerals. One of the key problems to be solved urgently in the reverse flotation of phosphate ore is the effective depression of apatite. However, research on the …
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most important phosphate mineral and flotation serves as the primary method for separating it from its predominant gangue ... exhibited the selectivity for calcite depression in binary ... to 10% at a concentration of 10 mg/L [32]. El-Mofty et al. (2015) conducted a study on calcite flotation in which recovery was achieved using 5×10-5 M ...
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However, admittedly, the efficient depression of calcite remains a difficult subject in phosphate flotation process. Gum arabic (GA) is a kind of natural gum produced in the semi-desert region of Sub-Saharan Africa, which has a complex chemical structure of branched chains of (1−3)-linked D-galactopyranosyl containing L-arabinofuranosyl, L ...
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In that sense, the relevant parameters of phosphate ores flotation are discussed while focusing on apatite, calcite, dolomite, and quartz as main constituent minerals. Leading phosphate producers ...
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It is also possible to achieve a selective flotation of carbonate and siliceous gangue elements by operating successively, by means of a collector of ester phosphoric type (alkylphosphates in C8--C20) (Table XVIII): (a) a phosphate + carbonate bulk flotation, silica remaining at cell bottom; TABLE XVII Flotation with an amphoteric reagent ...
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The results of single mineral flotation experiments showed that GA performed a considerable selective depression on calcite at pH 7–11, and a concentrate with apatite recovery of 88.84% and P 2 O 5 grade of 26.86% was obtained in the apatite-calcite binary mixed mineral flotation experiment. Therefore, GA can be used as a separate depressant ...
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Thus, CMCS is a potential depressant for calcite, which may provide a viable option for flotation separation of calcite-containing smithsonite ore. Nevertheless, the mechanism underlying CMCS selective depression on calcite for smithsonite flotation with NaOL as a collector fails to receive further discussions.
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To achieve this, phosphate froth flotation has been applied since the early 20th century, which can be performed through direct or reverse flotation methods. The first approach consists in the impurities' depression and the apatite recovery, whereas the reverse flotation involves the apatite depression and the gangue flotation [8].
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The obtained flotation results demonstrated the successful depression of calcite by all three reagents, with DTPMPA exhibiting the most pronounced depressing effect. Moreover, density functional theory (DFT) analysis revealed that DTPMPA possessed superior depressant capabilities on the calcite surface compared to the other two novel depressants.
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their interaction on calcite flotation using H 2SO 4 as a pH regulator. In addition, to elucidate the depressing action of KH 2PO 4 on calcite, electrokinetic properties of calcite have been …
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ively depress calcite in scheelite flotation [27–28]. Lignosulfonate is also used as depressant for the flotation of muscovite [29]. Moreover, calcium lignosulfonate also has depressant effect on chalcopyrite [30], talc [31]. Although calcium lignosulfonate has many applications in flotation, its selective depression of dolomite in apatite flota-
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most important phosphate mineral and flotation serves as the primary method for separating it from its predominant gangue mineral, calcite (CaCO 3). In this study, the direct flotation of …
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