Surface interactions and flotation behavior of calcite, dolomite and
The surface interactions and adsorption mechanism of alkyl hydroxamic acid bearing collectors and sodium silicate depressant on common carbonatite gangue minerals, including calcite, dolomite and ankerite in flotation were investigated.For this purpose, firstly the flotation behaviors of these minerals in the presence of the collector and …
Investigating the performance of oxalic acid for
Lauryl phosphate flotation chemistry in barite flotation ... In addition, citric acid [24] and oxalic acid [25] were also employed as depressants for fluorite and calcite in the flotation of bastnaesite, but they had the shortcoming of high COD wastewater that needed to be further treatment. ... The depression effect and mechanism of PESA on ...
Utilization of DTAB as a collector for the reverse flotation separation
Reverse flotation desilication is an indispensable step for obtaining high-grade fluorapatite. In this work, dodecyltrimethylammonium bromide (DTAB) is recommended as an efficient collector for the reverse flotation separation of quartz from fluorapatite. Its collectivity for quartz and selectivity for fluorapatite were also compared …
Role of calcium ions and their interaction with depressants in
Flotation results as well as thermodynamic analysis indicated that the formation of aqueous calcium/phosphate complexes (i.e., CaHPO4 (aq)) on …
Reverse flotation of sedimentary calcareous/dolomitic rock …
Two-stage reverse anionic flotation of carbonates (dolomite! calcite) has appeared to be a promising separation technique for the removal of carbonates from sedimentary rock phos phate. In reverse fatty-acid anionic flotation, the depression of phosphate mineral with orthophosphoric acid produces
Calcite in froth flotation
Micro-flotation tests show that carboxymethyl chitosan has strong depression effect on calcite and the depression effect decreased with the increase of …
Selective flotation of apatite from calcite using 2-phosphonobutane …
PBTCA exhibited selective depression for calcite flotation in the apatite-calcite system. Preferential flotation of apatite was achieved when the pulp pH value was adjusted to 8.5. ... Fluoride is an important component phosphate ore, and the leaching and migration behavior of fluoride during the phosphate ore flotation and slurry transfer ...
Calcite Flotation in Potassium Oleate/Potassium Dihydrogen Phosphate
Calcite flotation in acidic media is a difficult task due to the solubility of calcite and consequently the release of calcium ions in the flotation pulp. In addition, the interaction of calcium ions with the flotation reagents requires the correct selection of these reagents. In this study, potassium oleate and potassium dihydrogen phosphate …
Flotation of Calcium Minerals with Combination of Reagents
The influence of non-ionic compounds in combination with sodium oleate on the contrast behavior of flotation response of calcium minerals is investigated theoretically and experimentally. The flotation and adsorption analyses are carried out with monomineral fractions of calcite and scheelite, while the flotation process analysis is conducted with …
Al3+ enhanced the depressant of guar gum on the flotation …
In this study, aluminum ion surface modification was used to improve the depressive performance of citric acid on calcite. The micro-flotation experiment showed that the mixed depressant of aluminum ion and citric acid displayed a higher separation effect on the two minerals than the single citric acid, the recovery of scheelite was 90.6 …
Depression mechanism of novel organic phosphoryl depressants on calcite
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 …
Review of the reagents used in the direct flotation of phosphate …
The effect of lattice ions on calcite flotation in the presence of depressants was evaluated by Shi et al. . By the pre-treatment with Ca 2+ and CO 3 2−, the reactivity …
Flotation Tendency Assessment Through DOE: Case of Low …
Prior to this work, a micro-flotation study was conducted and demonstrated a direct flotation of apatite and depression of calcite by the reagents scheme used. The screening design experiments were conducted to address the flotation behavior of low-grade Moroccan phosphate ore. ... Cao Q, Cheng J, Wen S, Li C, Bai S, Liu D (2015) A …
Direct flotation of low-grade Moroccan phosphate ores: a …
Moroccan high-grade phosphate has so far always been upgraded by reverse flotation. Within a major project to go back to the deposits considered as sterile or low grade, this preliminary study was conducted in a micro-flotation cell to find new routes for their beneficiation by direct flotation. Three collectors, alone and combined to …
Selective flotation separation of apatite from calcite using …
Gum Arabic has also been used as a selective inhibitor with strong depression action on calcite flotation in neutral and alkaline environments and negligible effect on apatite flotation (Zhong et al., 2022). ... as a collector to explore the role and adsorption mechanism of a new regulator sodium monododecyl phosphate (SMP) on …
Selective adsorption of 1-hydroxyethylidene-1,1
This study validated the effectiveness of HEDP in separating smithsonite from calcite by flotation using sodium oleate (NaOL) as the collector, and obtained a 70% recovery difference in a single mineral flotation. ... Phosphate group contains three oxygen atoms, ... which cause the selective depression of calcite.
Role of calcium ions and their interaction with depressants in
The flotation of calcite alone or from phosphate slimes using potassium oleate as a collector and in the presence of potassium dihydrogen phosphate (KH 2 …
The effect of jojoba oil on the surface properties of calcite and
The beneficiation of phosphate ores by froth flotation is the most efficient process used to separate apatite from calcium minerals. However, the similarity of surface properties between apatite and calcite generally leads to non-selective adsorption of reagents, rendering the selective separation of these minerals a problem, demanding a …
Minerals | Free Full-Text | Selective Flotation of …
Fluorite is an important strategic mineral. In general, fluorite ores will contain a certain amount of calcite gangue mineral. Thus, they need to be separated from each other. For an economic separation, a …
Flotation separation of bastnaesite from fluorite with
Sodium silicate is a critical depressant in bastnaesite flotation, with which the flotation separation of rare-earth minerals from gangue is accomplished in Bayan Obo mines [7]. It has a strong depression effect on the salt minerals such as fluorite, calcite, and barite with the formation of a hydrophilic film on the mineral surfaces.
Recent Progress on Chelating Reagents in Flotation of Zinc …
Zinc oxide minerals (primarily smithsonite and hemimorphite) are important sources of Zn. Flotation is the most widely used method of enriching zinc oxide minerals for mineral processing. Chelating reagents have received extensive attention for the flotation of zinc oxide ores because of their high selectivity and stability. This paper systematically …
Study on the depression mechanism of calcium on the flotation of …
That is, the presence of calcium shows a depression on sphalerite flotation and as the iron content of sphalerite or the pH value increases, the depression from …
Double reverse flotation of a very low grade sedimentary phosphate rock
Highlights The flotation response of apatite and calcite using of fatty acid collectors were investigated. Several kinds of phosphate minerals depressant were also evaluated. Phosphoric and sulfuric acids successfully depressed sedimentary phosphate minerals. A mixture of (Na,K) Tartarat and aluminum sulfate had a maximum effect on …
An Overview of Calcite Recovery by Flotation
Overall, most of the studies reported optimum flotation conditions of calcite recovery above pH 8 with anionic collectors. A few …
Flotation separation of apatite and calcite using gum arabic as a
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 …
Utilization of polyepoxysuccinic acid as the green
However, there are few studies related to depressants of gangue mineral calcite during apatite flotation. 2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) has also been studied as a calcite depressant in apatite flotation (Liu et al., 2019a), but the phosphate group of PBTCA will cause eutrophication of water bodies, and therefore will …
Depression mechanism of novel organic phosphoryl depressants …
ATMP, DTPMPA and HEDP can depress the recovery of calcite in flotation process. • Study on flotation depression mechanism of calcite with depressants by …
Elimination of the adverse effect of calcite slimes on the
Previous studies have shown that many depressants, such as lignosulfonate [15], water glass, sodium humate and phosphates can be used to depress calcite [[16], [17], [18]], however, water glass is usually used for calcite depression in practical flotation because of its cheap price.
Role ofDissolved Mineral Species in Calcite-Apatite Flotation
and dissolution properties. While depression of calcite flotation by the dissolved species isfound to be governed by depletion ofoleate by bulk precipitation, the depression of apatite flotation is caused by the carbonate and phosphate species in the system. Turbidity measurements and a thermodynamic analysis of possible interactions in the
Reagents used in the flotation of phosphate ores: a critical review
Phosphoric acid and derivatives (e.g., diphosphonic acid) is the most widely used depressant in reverse flotation of phosphate ore in order to depress the valuable mineral apatite while sodium silicate and gum arabic are used as depressants for the gangue minerals in direct flotation of the phosphate ores. 5.