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A FOCUS ON CATIONIC CHEMISTRIES FOR REVERSE FLOTATION OF SILICATES. Evonik produces an array of performance chemicals that serve the mining industry. At the core of that technical know-how is the production of high-quality reagents for reverse flotation of non-sulfide ores. Our Tomamine product line of ether amines is designed specifically for this type of mineral flotation.
cationic collector into the anionic collector as the collector mixture can improve the metallurgical results of removing silicates in reverse flotation. In this paper, NaOL and DDA were used for reverse flotation of the ultrafine magnetic concentrate. The separation performance of
Separation of silica from pyrite cinder via reverse ... sheet of open-circuit separation of pyrite cinder is shown in Fig.6, and the results are shown in Table 3.The results showed that the separation of silica from pyrite cinder by reverse flotation is possible and good selectivity can be achieved at about pH 8.2.
US2904177A US662322A US66232257A US2904177A US 2904177 A US2904177 A US 2904177A US 662322 A US662322 A US 662322A US 66232257 A US66232257 A US 66232257A US 2904177 A US2904177 A US 2904177A Authority US United States Prior art keywords flotation ore per ton ilmenite silicates Prior art date 1957-05-29 Legal status The legal status is an assumption and is not a legal
the entrainment of silica and alumina was low and the iron minerals could be ef-ficiently recovered 32 Reverse Flotation 321 Effect of Slurry pH Figure 5 shows the effect of pH on the flotation of silica and alumina using DAA as cationic collector Silica trend shows its lowest content of 31 mass in con-
0.173.34mM. Increasing the dodecane concentration from 02730gt 00.81mM in a DDA-silica system was found to have no effect on the stability of the silica particles. Flotation data showed that the addition of dodecane with DDA in combination increased the removal rate of silica particles.
involve flotation of micron-size particles taconite and kaolin. With respect to flotation rate, the variation is great, with long retention times even 1 hour required for the flotation of impurities anatase, etc. from kaolin, whereas rather rapid flotation a few minutes of retention time is required for phosphate flotation.
Flotation equipment technology screening922 . Pneumatic flotation is however still considered as a non-conventional flotation process. Due to its highly selective nature in operation it has generallyCMH spent considerable time on developing a reverse flotation process and a reagent suite to try and reduce the silica content to acceptable levels.
BACKGROUND OF THE INVENTION. This invention is related to reverse flotation processes wherein silica or siliceous gangue is floated. Flotation is a process of treating a mixture of finely divided mineral solids, e.g., a pulverulent ore, suspended in a liquid whereby a portion of the solids is separated from other finely divided mineral solids, e.g., silica, siliceous gangue, clays and other ...
concentrates with weak silica content and satisfactory iron recovery were obtained by reverse cationic flotation, when it was fed with iron pre-concentrate produced by high gradient magnetic separation. However, conducting the reverse cationic flotation implies a depression of hematite by starch and flotation of silicates by amine collectors.
The present invention relates to a method for the flotation of silicates from ores in the presence of a collecting agent and an effective amount of a froth modifiercollecting booster comprising at least one of the compounds of general formula I or mixtures thereof wherein X is C1-C3 alkyl R is straight or branched hydrocarbyl group containing 8 to 22 carbon atoms n is integer from 2-4 ...
The results concerning the role of the silicate mineralogy on the choice of reagents and flotation processes are also discussed. Further development of the reverse cationic flotation of iron ores requires a more detailed consideration of the nature of iron-bearing gangue minerals and the application of original approaches for the selective ...
out using sodium silicate and sodium oleate as depressant and collector respectively. Reverse flotation process was adopted where silica containing minerals of the gangue quartz are floated using cationic collector SOMU Sokem 565C. The direct flotation process using sodium
Separation of silica from pyrite cinder via reverse cationic flotation. is man-made porous ore. ... The reverse cationic flotation is one of the main processes used by the iron ore ... Sodium hydroxide was used as pH conditioner. Read more
For Brazilian iron ore producers, reverse cationic flotation is preferred to obtain high quality concentrates from silicate ores. The SiO2 silica particles are rendered hydrophobic by amine cationic collector in alkaline conditions, while iron is depressed by the addition of starch.
Reverse flotation studies on magnetite samples have revealed that the use of starch as a depressant of Fe-oxides has a hydrophilic effect on the surface of Fe-bearing silicates and significantly decreases Fe in the silica-rich stream when used in combination with an amine Lilaflot D817M. In this study, the effect of reverse flotation on the optimization of products obtained from magnetic ...
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.
The cation thus formed is easily adsorbed on anionic sites of silicasilicate surface by way of electrostatic interaction 4. The cationic flotation reverse flotation is attractive because the cationic collectors are insensitive towards hard water salts, low consumption, less induction time and high contact angles. 2. Materials and Methods
silicates. In other words, quartz is a silicate made of pure silica. But feldspars contain sodium, aluminum, potassium and calcium in addition to silicon and oxygen. Thus feldspars are silicates but they arent pure silica. Geochemists also use the term silica to refer to the overall silicon
Double reverse flotation of a very low grade DeepDyve. Sep 14, 2011 Read Double reverse flotation of a very low grade sedimentary phosphate rock, rich in carbonate and silicate, International Journal of Mineral Processing on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Reverse iron ore flotation is described in US-3 363 758 , US-4 168 227 content, but also to the direct flotation of quartz and other silicates. Chat Online Inquiry Form. Read more Iron Ore Reverse Flotation Process - Crusher USA
Silicate-containing minerals are generally removed from flotation systems by using reverse flotation technique whereby the silicates are floated in a pH range from natural pH to 10.5-11 and the beneficiated ore is concentrated in the bottom fraction.
Phosphate rock contains various gangue minerals including silicates and carbonates which need to be reduced in content in order to meet the requirements of the phosphate industry. Froth flotation has become an integral part of phosphate concentration process. In this study, double reverse flotation was applied to recover apatite from phosphate ore. H3PO4 and CaO were used as phosphate ...
Twelve cationic, amine-salt silica-collectors were evaluated on three samples of magnetic iron-ore concentrate. Coco primary amine acetate was used as the standard of comparison. Lauryl primary amine acetate is somewhat more efficient in collecting silica than the standard, and equally selective. Tallow primary amine acetate is equally selective and somewhat less efficient than the the standard.
Removal of hematite from silica sand ore by reverse flotationKnow More. Several beneficiation techniques such as washing, jigging, spiral, tabling, magnetic separation, flotation etc. are being employed to enhance the quality of the iron...
Quartz and silica are common materials, and their dissolution is of significant interest to a wide range of scientists. The kinetics of the dissolution of quartz and silica have been measured extensively, yet no clear theory of dissolution is available. A novel theory of dissolution and crystallization has recently been proposed that envisages the removal of material from the surface to form ...
Twelve cationic, aminesalt silicacollectors were evaluated on three samples of magnetic ironore concentrate. Coco primary amine acetate was used as the standard of comparison. Lauryl primary amine acetate is somewhat more efficient in collecting silica than the standard, and equally selective.
Reverse flotation of silica from Kudremukh iron ore, Part More, P, and Bhaskar Raju, G, 2005. Semi-commercial scale studies 1.Selection of cationic reagents, Transactions of the Indian Institute of using flotation column and dual extraction column on iron ores of Metals, 505 391- 396.
The process is composed of desliming -10 m, followed by reverse cationic flotation of kaolinite rougher, scavenger at pH5. Results indicate that the reverse cationic flotation in the acid medium, when utilizing amide amine as collector and in the presence of a silicate activator and a dispersing agent could be a possible route for the ...
flotation iron ore mining Flotation of iron ore The main objective of iron ore flotation is to upgrade the concentrate by removing silicates andor phosphorus-containing minerals. The use of silica flotation has increased in recent decades. The trend will continue as more complex ores have to be mined and higher-grade iron ore concentrates with ...
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