(PDF) Selective flotation of silicates and Ca …
The most important information from this study is about selective flotation of palygorskite from a family of silicates using a mixture of primary amine (Cataflot, 5 × 10−5 M) and non-ionic ...
Effect of Phosphate and Fluoride on the Flotation of Aluminum-Silicates
Phosphates and fluorides are adopted as regulators for the removal of silicates from diasporic-bauxite by flotation. Micro-flotation tests show that sodium hexametaphosphate has a stronger depressing power on diaspore than sodium fluorosilicate at pH 6.5 while using dodecylamine chloride as a collector. Zeta potentials …
US4113106A
The tin flotation process as defined in claim 1, wherein at least one of sulfurous acid and a sulfite is used in said flotation in a quantity corresponding to from 20 to 1000 grams of SO 2 per ton of initial tin ore. 4. The tin flotation process as defined in claim 1, wherein sulfurous acid is used in said flotation. 5.
The Importance of pH in Flotation
The Importance of pH in Flotation. In flotation, pH control is a vital method to control selective mineral separation. A standard depressant that is used is an Alkali. An Alkali is any substance that when mixed with Acid will neutralize each other and form a new chemical substance called a BASE.
(PDF) Selective flotation of silicates and Ca-bearing …
The most important information from this study is about selective flotation of palygorskite from a family of silicates using a mixture of primary amine (Cataflot, 5 × 10−5 M) and non-ionic...
Tin‐containing Silicates: Alkali Salts Improve Methyl Lactate Yield
A pretty basic solution: The presence of alkali metal ions (either in the catalyst or in the medium) in the Sn-Beta zeolite-catalyzed synthesis of methyl lactate from sugars increases the yields, from 30 % to 75 %. The alkali effect is found to apply to Sn-Beta prepared by post-treatment of a dealuminated commercial zeolite as well as for …
Flotation of rare earth minerals from silicate–hematite ore …
2.3. Flotation. A laboratory 0.5 L flotation cell (CMT Flotation Tester FT-1000) was used in the flotation experiments.The 80 g wet ground sample was diluted to 0.4 L slurry with tap water in the cell and the agitator was set to 1,200 rpm.The initial pH of the slurry was measured and the pH was adjusted to a desired conditioning pH. The …
A study of the reprocessing of fine and ultrafine cassiterite …
1. Introduction. Historically, the dominant beneficiation strategy to recover cassiterite (SnO 2) from tin ores has been gravity separation (including jigs, spirals and tables), which could be followed by sulfide flotation for further upgrading (Bulatovic, 2010).As gravity concentration techniques are very sensitive to particle size, the recovery …
Role of magnesium-bearing silicates in the flotation of …
The flotation of pure pyrite under different pHs is also shown in Fig. 2 a for comparison. It is seen from Fig. 2 a that the maximum flotation recovery of pyrite alone was achieved at the PAX dosage of 1 × 10 −4 M, after which further increasing of PAX dosage did not increase the pyrite recovery. However, pyrite flotation was significantly ...
A Correlation Between Surface Phenomena and Flotation in Silicates
Flotation of Silicate Minerals. On the basis of the previous discussion of sorption phenomena for silicate minerals, we are in a good position to study and explain the behavior of silicate minerals in froth flotation. Many investigators (Eigeles, 1960, 1961; Berlinskii, 1962; Choi and Oh, 1965) have studied the flotation properties of silicates.
Role of magnesium-bearing silicates in the flotation of …
The flotation response as a function of pH and collector concentration was analyzed, wherein quartz was not responsive to floatation in single mineral flotation tests in the presence of anionic ...
The Role of Soluble Sodium Silicate for Enhancing Flotation …
With the recent increasing use of hydroxamic acid collectors in rare earth flotation, sodium silicate is used to depress gangue silicates prior to the addition of the collector [27, 28]. At low alkaline conditions (pH 9.0), the depressing action of sodium silicate upgraded a rare earth concentrate from 9.8–12 to 34–55% TREO content .
Flotation Reagents
Flotation Reagents. This data on chemicals, and mixtures of chemicals, commonly known as reagents, is presented for the purpose of acquainting those interested in froth flotation with some of the more common reagents and their various uses. Flotation as a concentration process has been extensively used for a number of years.
The use of pracaxi oil collector in the selective flotation of …
Conclusions. This work investigated the potential of pracaxi oil collector (PXC) in the selective flotation of xenotime from the main silicate gangue minerals found in granitic deposits. Pracaxi oil is a renewable source of fatty acids, in addition to being found in abundance in the Amazon region.
On the mechanism of the flotation of oxides and …
Electrostatic mechanism is established for the flotation of oxides and silicates. •. Argued that the mechanism of surface charging is not adsorption. •. Instead, …
A Correlation Between Surface Phenomena and …
A Correlation Between Surface Phenomena and Flotation in Silicates. Table of Contents. Experimental studies on the flotation of silicate minerals go back at …
Collecting Agent–Mineral Interactions in the Reverse Flotation …
Froth flotation has been widely used in upgrading iron ores. Iron ore flotation can be performed in two technical routes: direct flotation of iron oxides and reverse flotation of gangue minerals with depression of iron oxides. Nowadays, reverse flotation is the most commonly used route in iron ore flotation. This review is focused …
Formation of highly dispersed tin nanoparticles in amorphous silicates
Amorphous sodium tin silicates. The XRD patterns for Na 2 O·2SiO 2 glass prepared by the melt-quenching method and the pristine samples of xSnO-(100-x)/3Na 2 O-2 (100-x)/3SiO 2 with x = 25–75 (mol%) synthesized by the MC method are shown in Fig. 1. Any significant diffraction signals indicating the presence of crystalline phases are not ...
"The Use of Chitosan as a Green Depressant of Silicates in Phosphate …
The application of green reagents as process aids in the froth flotation process is of crucial importance in order to reduce the environmental impacts. In this study, chitosan polymer was used as a green depressant of silicates in the direct flotation of phosphate minerals. Zeta potential measurements were used to examine the electrical …
The role of citric acid in the flotation separation of rare …
3. Results 3.1. Micro-flotation Based on the chemical analysis of the minerals identified in the ore, the elements La, Ce and Nd are considered representative of Feed 2.2. Micro-flotation 3' 3' 3' 3' The micro-flotation cell used was modified from Siwek et al. (1981). The liquid volume was 100 mL and the charge sample size was 10 g.
Reverse flotation for removal of silicates from diasporic-bauxite
Aluminum-silicates such as pyrophyllite, illite, kaolinite and chlorite are impurity minerals in diasporic-bauxite, it being necessary to remove these silicate minerals to improve the mass ratio of Al 2 O 3 /SiO 2 of diasporic-bauxite for the Bayer process. A new quaternary ammonium salt (DTAL) has been shown to be efficient in the flotation of ...
Sodium Silicate in Phosphate Flotation
The use of sodium silicate accelerated the flotation of phosphate relative to quartz, and also made the froth drier (continuous flotation). Calcium silicate precipitates served as a protective coating on bubbles and stabilized the froth, due to an increase in surface viscosity. These bubbles were very resistant to coalesce because the calcium ...
Handbook of silicate flotation | Semantic Scholar
A. Tohry R. Dehghan H. Mohammadi-Manesh L. S. L. Filho S. C. Chelgani. Materials Science, Chemistry. Sustainability. 2021. Micaceous minerals, known as layer silicates, are counted mostly as the gangue minerals associated with valuable minerals, especially iron oxides. They mainly reject through the reverse flotation…. Expand.
Selective flotation of silicates and Ca-bearing minerals: …
Highlights Flotation of pure minerals constituting the gangue of rare metal low grade ores was performed. Mixed collector synergetic effects confirmed for silicates and Ca-minerals flotation. Selective separation of palygorskite from silicates and Ca-minerals is achieved at pH 8. Reagents consumption lowered with addition of non-ionic reagent …
Recovery of rare earth elements minerals from iron oxide–silicate rich
Flotation concentrate from the non-magnetic tails contained 2.78% REE minerals (representing an upgrade of 2.50, calculated based on mineralogical data on IST feed). ... Anionic flotation of oxides and silicates. M.C. Feurstenau (Ed.), Flotation, American Institute of Mining, Metallurgical, and Petroleum Engineers, New York (1976), …
New perspectives in iron ore flotation: Use of collector …
The reverse flotation of the iron ore with etheramine collector is significantly impacted when the iron-bearing silicates and the kaolinite are present in the silicates gangue mineral complex. This paper aims to propose a new amidoamine collector N-[3-(Dimethylamino)propyl]dodecanamide for iron ore reverse flotation with a potential of …
Role of magnesium-bearing silicates in the flotation of …
Flotation is the most effective separation solution used in sulphide ore beneficiation. In sulphide ore flotation, the interaction between the valuable sulphide minerals and the gangues are complex. Serpentine, a common magnesium-bearing silicate mineral in sulphide ores, can largely depress the flotation of the valuable sulphide …
On the mechanism of the flotation of oxides and silicates
The mechanism of flotation of oxide and silicate minerals was established long ago as being due to the electrostatic attraction between the charged surface and the charge of the collector. What is less well established is the mechanism of the charging of the mineral surface. Most researchers have postulated that the adsorption of H + is the …
Investigation of the depressants involved in the selective flotation …
However, the fluorite and silicates were affected by similar coefficients (Fig. 8). This indicated that only some of the silicates, probably the calcium-bearing silicates, were problematic in the flotation process and that the fluorite poses a greater problem in flotation. Download : Download high-res image (166KB) Download : Download full-size ...
FLOTATION EXTRACTION OF TIN FROM TAILINGS OF …
This product is one of the sources the form of enrichment tailings of sulfide- of tin losses (up to 33.5%) in the flotation concentration process and requires additional technologi-tin …