In this study, potassium oleate and potassium dihydrogen phosphate (KH2PO4) were used as collector and depressant, respectively. Micro-flotation experiments were …
WhatsApp: +86 18221755073
The flotation of calcite alone or from phosphate slimes using potassium oleate as a collector and in the presence of ... to tackle this complexity, calcite reverse flotation (calcite depression ...
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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% ...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The results showed that the depression effect of sodium alginate is more pronounced on the calcite flotation using oleate collector, without affecting the flotation performance of fluorapatite. In the anionic flotation of natural iron ore (Bai et al. 2019 ), the use of soluble starch as depressant for hematite in apatite flotation exerts the ...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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 PO 4) as a phosphate …
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
carbonate and phosphate can be somewhat altered.. in the presence of one another. Carbonate and phosphate species can be expected to chemisorb - --on the calcite surface and thus can compete with oleate for the surface Casites resulting in flotation depression. Ca on the ~ - - -
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The main depressants for separating smithsonite and calcite by flotation are inorganic and organic depressants. Inorganic depressants mainly include sodium silicate (Na 2 SiO 3) and sodium hexametaphosphate ((NaPO 3) 6) (Changgen, 1983, Liao et al., 2022).Currently, sodium silicate is the most commonly used inorganic depressant in the industry.
WhatsApp: +86 18221755073
When STPP was used for the depression of calcite mineral, the grade of WO 3 in the concentrate of scheelite improved from 1.42 to 1.8%, the recovery of scheelite was essentially unchanged, and the calcite recovery dropped by ... Snow R, Zhang P (2002) Surface modification for improved phosphate flotation. J Colloid Interface Sci 256:132–136.
WhatsApp: +86 18221755073
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
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The PS was then evaluated for its ability to depress apatite, enhancing the separation efficiency of apatite from calcite in phosphate rock beneficiation via reverse flotation. Micro-flotation experiments revealed PS's distinct depression effect on apatite while minimally impacting calcite.
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
In general, precipitated calcium carbonate (PCC) is used as a mineral filler in paper industries; while natural calcite (CaCO3) ore is also suitable for industrial use if it is a finely ground high-grade material. Naturally, calcite is …
WhatsApp: +86 18221755073
Moreover, collectors' adsorption on the surface of quartz was minimal. Accordingly, flaxseed's soap, served as an efficient calcite collector in phosphate flotation while including phosphoric acid for apatite depression. It enabled the recovery of …
WhatsApp: +86 18221755073
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].
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
ABSTRACT. Apatite (Ca 10 (PO 4) 6 F 2) is the most important phosphate mineral, and flotation is the main beneficiation method to separate apatite from its major gangue mineral calcite (CaCO 3).Till date, fatty acids and their salts have been widely used as collectors in the apatite/calcite flotation separation due to their low cost and strong collecting ability, but their …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The obtained flotation results demonstrated the successful depression of calcite by all three reagents, with DTPMPA exhibiting the most pronounced depressing effect. Moreover, …
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
DTPMPA was used as a chelating inhibitor to study the flotation, separation, and adsorption behaviors of fluorite and calcite minerals. The microflotation experiment showed …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
The depression mechanism of a combination of ZnSO4 and Na2CO3 on talc during chalcopyrite and molybdenite flotation was investigated in-depth using flotation tests, solution speciation ...
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073