Abstract The mechanism of carboxymethyl cellulose (CMC) on the galena surface and the enhancement of KMnO4 on the depression of CMC to galena were investigated by flotation test, surface adsorption experiments, scanning electron microscopy-energy dispersive spectrometry (SEM-EDS), and X-ray photoelectron …

The depression mechanism of a combination of ZnSO4 and Na2CO3 on talc during chalcopyrite and molybdenite flotation was investigated in-depth using flotation …

In this paper it is recommended that pyrite is to be separated as froth from arsenopyrite by selective depression of arsenopyrite in strong alkaline medium (1), by oxidation with chlorinated lime (II), by co-use of chlorinated lime with sodium carbonate (III), and by modification with `L' reagent (know-how) without filtering to get rid of residual copper …

Solution chemistry, zeta potential and Fourier transform infrared spectroscopic measurements were performed to study the mechanisms of selective depression of sulfide minerals by thioglycollic acid/citric acid during the flotation of carbonate minerals by sodium oleate. It was observed that the addition of the mixed depressants (thioglycollic …

Solution chemistry, zeta potential and Fourier transform infrared spectroscopic measurements were performed to study the mechanisms of selective depression of sulfide minerals by thioglycollic acid/citric acid during the flotation of …

WANG et al [15] investigated the depression mechanism of a combination of zinc sulfate (ZnSO4) and sodium carbonate (Na2CO3) on talc flotation, suggesting …

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While it is clear that flotation or depression depends upon the balance of hydrophobic and hydrophilic species on the surface, the finding above indicate that several ionic equilibria can modify pyrite surfaces only by a change in pH (He et al., 2005, López Valdivieso et al., 2005). In real ore systems, many ionic species can modify the ...

In this study, amino radicals were introduced into starch to improve its flocculation and depression capacity. The performances of corn starch and modified starch in refractory carbonate-containing iron ore were compared. The flotation results showed that modified starch had a stronger depression effect on hematite and quartz.

a flotation depressant, mainly for the depression of carbonate and talcaceous gangue in the flotation of Cu-Ni sulfide and PGM ores. Although CMC is a common depressant that can be used in the flotation of different ores, understanding of the interaction mechanisms between CMC and mineral particles in different flotation circuits and different

Thus, sodium carbonate is commonly used in flotation as a pH modifier [57]. Moreover, its addition prior to sodium silicate produced positive synergistic effects on gangue mineral depression [5, 21, 23, 26, 58]. In this study, this combination afforded the best results over all the tested depressants.

Interestingly, flotation at the minimum is found to increase from about 25% to 85% with increase in KNO3 from 0 to 3 x 10-2 kmo1/m3. Flotation again increases to about …

The flotation experiments and contact angle measurements indicated that the selective depression effect of sodium carbonate on the calcite mineral is more than that of calcium chloride. As evidenced by zeta potential and FT-IR analysis, sodium …

In the cationic flotation of pyrolusite using dodecyl ammine (DDA), the depressive effect of sodium carbonate and calcium chloride on the calcite mineral was …

Calcite depression through the flotation of its associated valuable minerals (such as barite, scheelite, apatite, monazite, cassiterite, etc.) could be accomplished by depressants (Table 3). Starch is the most common depressant for calcium mineral separation, which has a higher affinity towards calcite over apatite, thereby adsorbing …

DOI: 10.1016/s1003-6326(23)66203-x Corpus ID: 259467855; Depression mechanism of ZnSO4 and Na2CO3 on talc flotation @article{Li2023DepressionMO, title={Depression mechanism of ZnSO4 and Na2CO3 on talc flotation}, author={Jia-lei Li and Yin-yu Ma and Guang-li Li and Zhi-cheng Liu and Shuai Ning and Bin Pei and Zhao-you Lang and Rui …

The flotation experiments and contact angle measurements indicated that the selective depression effect of sodium carbonate on the calcite mineral is more than that of calcium chloride.

DOI: 10.1016/S1003-6326(17)60206-1 Corpus ID: 102738969; Effects of sodium carbonate and calcium chloride on calcite depression in cationic flotation of pyrolusite @article{Rahimi2017EffectsOS, title={Effects of sodium carbonate and calcium chloride on calcite depression in cationic flotation of pyrolusite}, author={Shima Rahimi and Mehdi …

In froth flotation separation, the first use of polysaccharides dates back to 1928 and has continued up to now [34].Although several polysaccharides have been recently synthesized and extensively used for pyrite depression in different mineral processing plants, no comprehensive review article has universally explored their …

Depression mechanism. The flotation experiments and series of surface analysis results illustrate that GG adsorbed stronger towards dolomite than magnesite. ... Comparative effects of sodium silicate and citric acid on the dispersion and flotation of carbonate-bearing iron ore. J. Mol. Liq., 271 (2018), pp. 16-23. View PDF View article View in ...

The principle of reverse flotation is that valuable minerals are sunk [4, 5]. Due to these minerals similar soluble properties and structures, direct flotation is inefficient. Therefore, reverse flotation of carbonate gangue and depression of apatite has been practiced by predecessors [4, 6]. Thus, the understanding of depression mechanism of ...

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, …

Therefore, the depression mechanism of high-iron sphalerite flotation in high-alkalinity lime systems and the role of iron content played in the depression are important research topics. Researchers have extensively investigated the depression of zinc sulfide mineral flotation in high-alkalinity and high-calcium environments and have …

The depression performance and mechanism of the combined depressant containing potassium ferricyanide (K 3 [Fe(CN) 6]), zinc sulfate (ZnSO 4), and sodium carbonate (Na 2 CO 3) with potassium isobutyl xanthate (PPBX) as the collector in a mixed Pb–Zn sulfide flotation system were investigated using microflotation experiments, …

Zinc sulfate is a commonly used selective depressant for zinc sulfide minerals, and a mixture of ZnSO 4 and Na 2 CO 3 is an effective combined inhibitor for talc. This study indicated that only using ZnSO 4 could inhibit talc in chalcopyrite flotation and its depression mechanism was investigated. Microflotation tests indicated that ZnSO 4 …

Selectively Depress Copper-Activated Pyrite in Copper Flotation at Slightly Alkaline pH. Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu (I/II)….

Return to parent product. Carboxymethyl cellulose, CMC, is widely used in mineral processing as a flotation depressant, mainly for the depression of carbonate and talcaceous gangue in the flotation of Cu-Ni sulfide and PGM ores. Although CMC is a common depressant that can be used in the flotation of different ores, understanding of …

The slurry pH values of 9 were controlled using a carbonate/bicarbonate buffer. Deionised water was used throughout the experimental work. Wet and dry weights were measured for all flotation products (four concentrates and the final tail). ... However, it is unlikely to be an active mechanism for depression in the flotation experiments ...

The effects of carbonate minerals (dolomite and siderite) on the flotation of hematite using sodium oleate as a collector were investigated through flotation tests, supplemented by dissolution measurements, solution chemistry calculations, zeta-potential measurements, Fourier transform infrared (FTIR) spectroscopic studies, and X-ray …

Not only the dosages required for pyrite depression were significantly reduced, but the mixed depressant also depressed chalcopyrite, without affecting the flotation of the carbonate minerals. 4. Using the mixed depressant, the carbonate minerals could be selectively floated from carbonate–sulfide mineral mixtures.