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 ... thereby leading to optimized gangue mineral depression in the floatation process. These conditions were established as: ...
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 ...
Keywords: lime depression, pyrite activation, flotation, ammonium salts, XPS spectra Introduction Pyrite and pyrrhotite are the most common type of iron sulfides in nature. On demand, they can be a primary resource to produce elemental sulfur and sulfuric acid for various further use in the chemical industry. ... (Yan and Wang, 1987). When ...
What kind of carbonate minerals depression is preferrable for Au-bearing sulfides flotation (may be reverse flotation?) for such an ore:quartz - 10-30%feldspar (orthoclase) - 5-40%clay&mica - 20-30%Fe-dolomite&ankerite - 5-60% (!)FeS2 - 1-8%FeAsS - 0,5-3%AsS - 0,2-2%ZnS - 0,1-4%PbS - 0,1-1%Gold is mainly assotiated with Py and AsPy. …
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 …
DOI: 10.1016/J.MINPRO.2006.06.003 Corpus ID: 97263349; Flotation and depression control of arsenopyrite through pH and pulp redox potential using xanthate as the collector @article{Valdivieso2006FlotationAD, title={Flotation and depression control of arsenopyrite through pH and pulp redox potential using xanthate as the collector}, …
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 interaction …
In this pH range, the flotation recovery of pyrolusite is higher than that of calcite. 2) Sodium carbonate and calcium chloride have a good depression effect on the calcite flotation. Sodium carbonate acts more effectively than calcium chloride. These depressant agents do not have a significant negative effect on the flotation of pyrolusite.
SDD alone [21,22]. Because Zn2+, which was used as a modifier, can enhance the depression effect in sulfide mineral flotation, it is significant to study the effect of Zn2+ modification on carbonate mineral flotation. In the present study, the flotation separation of magnesite from dolomite using sodium
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 interaction mechanisms …
The depression of pyrite in copper ore flotation is a challenge in high salinity water although natural pyrite can be depressed readily at alkaline pH due to the formation of iron hydroxides on pyrite surfaces (Boulton et al., 2001, Mu et al., 2016). ... Selective adsorption analysis of BAPTA depressants on the surface of carbonate …
The flotation experiments and contact angle measurements indicated that the selective depression effect of sodium carbonate on the calcite mineral is more than …
For flotation process, there are selective flotation of talc before flotation of copper-bearing minerals, the flotation of copper-bearing minerals with depression of talc, and …
Flotation trials showed that the depression of magnesium on the flotation of sphalerite could be significantly improved with the increasing iron contents. Solution chemical calculations indicated that MgOH + was the dominant group in solution under high-alkalinity environment.
Flotation tests indicate that the effective depression of talc flotation occurred in the pH range of 7−9. In this pH range, speciation calculations for the mixed solution of ZnSO 4 and Na 2 CO 3 showed that the Zn 5 (OH) 6 (CO 3 ) 2 precipitate was the predominant zinc-bearing species, which was further proven by X-ray diffraction and ...
The depression of pyrite flotation by cyanide may result from one or more of the following mechanisms: (1) Cyanide may depress pyrite flotation by replacing xanthate ions on pyrite surface, similar to hydroxyl ions (Wark and Cox, 1934; Prestidge et al., 1993).
Flotation is the main beneficiation method for medium to low grade phosphorus ores, which achieves separation between minerals based on differences in the physical and
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.
Selective Adsorption Analysis of BAPTA Depressants on the Surface of Carbonate Minerals: Insights into Flotation Behavior and Adsorption Mechanism. Haoran Sun Yu-lian Wang Daowei Wang Wanzhong Yin Jin Yao. Chemistry, Materials Science ... Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ …
Fig. 2 shows the effect of pH on the flotation recovery of minerals in the presence and absence of copper ions In the absence of the copper ions, the recovery values of both pyrite and arsenopyrite fluctuated between 55 % and 65 % at pH 2.5–6.5. Furthermore, their floatability rapidly decreased when the pH value was above 6.5. Two …
Calcite flotation from a carbonate phosphate ore by CO 2 as the apatite depressant has also been reported . ... investigated the feasibility of polyacrylamide, which contains both –OH and –COOH functional groups, for the depression of apatite and the flotation of siliceous gangue in the cationic collector system. The results showed the ...
Cu 2+ and Fe 3+ are generally inevitable in the flotation of molybdenite. In this work, the effect of Cu 2+ and Fe 3+ on the flotation of molybdenite was investigated through flotation tests. The influence mechanism was studied by Zeta potential measurement, scanning electron microscopy-energy-dispersive spectroscopy (SEM …
Breccia in Shulu depression was found in the middle and low of the third segment of Shahejie Formation, itisabreccia with carbonate fragment as its main constituent, and distributes skirt-shapelyon slopes in the depression. Breccia and marlstonewith breccia are familiarbreccias in the area and the former is domestic. Grain and matrix in the breccia …
Carboxymethyl cellulose, CMC, is widely used in mineral processing as a flotation depressant, mainly for the depression of carbonate and talcaceous gangue in the …
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 …
Changes in the flocculation and depression properties of starch after introducing amino radicals were compared in carbonate-containing iron ore flotation. Differences in adsorption between corn starch and modified starch were determined through zeta potential measurements, X-ray photoelectron spectroscopy (XPS) analyses, and …
In this study, the flotation behavior, contact angle and surface adsorption of calcite were investigated in aqueous solution containing excess lattice ions (Ca 2+ and …
However, depression of sulfide minerals when non-sulfhydryl collectors are used as collectors has not been extensively studied, ... by using sodium oleate alone would not be possible. Selective reverse carbonate flotation using sodium oleate would require a selective depressant for the sulfide minerals. 3.2. Depressants for the sulfide minerals
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, …
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 …