Reverse cationic flotation is the most widely used technique for upgrading iron ore concentrates and first a sulfide flotation step followed by a silicate flotation one Conditioning time...

Cationic flotation of silica from magnetic iron-ore concentrates Cationic flotation of silica from magnetic iron-ore concentrates Hedberg M 1970-05-01 00 00 00 Twelve cationic amine-salt silica-collectors were evaluated on three samples of magnetic iron-ore concentrate Coco p r i m a r y amine acetate was used as the s t a n d a r d of comparison...

May 30 2016 0183 32 1 Introduction Flotation is usually employed to remove silicate as the main impurities from many ore types especially iron or Iron oxides can be concentrated either by direct flotation using anionic collectors or reverse flotation of siliceous gangue with both cationic and anionic collectors Studies showed that the flotation recovery and selectivity was significantly higher in...

US2419945A US567762A US56776244A US2419945A US 2419945 A US2419945 A US 2419945A US 567762 A US567762 A US 567762A US 56776244 A US56776244 A US 56776244A US 2419945 A US2419945 A US 2419945A Authority US United States Prior art keywords iron flotation silica lime pulp Prior art date 1944-12-11 Legal status The legal status is an assumption and is not a legal conclusion...

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...

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 concentrate at pH 8 and it was not removed with further increase in pH Iron grade trend shows a slight increase from pH 68 to 8...

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...

Mar 10 2014 0183 32 The major problem with the reverse cationic flotation of low grade finely grained iron ores is related to the presence of iron-bearing silicates such as amphiboles and pyroxenes the flotation recovery of these compounds is low when using common reagent combinations...

Oct 31 2020 0183 32 In this work the reverse flotation as beneficiation process for high-purity silica valorization from Draissa quartz deposits Algeria is studied as a potential raw material for photovoltaic silicon production and starting charge for crystal growth material for a large wide of applications such laser and scintillation The samples are investigated by optical microscopy secondary ion mass...

reverse flotation of low grade iron ore in china Iron Ore Reverse Floatation Process Video We have Iron Ore Reverse Floatation Process Video Quartz is the major gangue mineral present in iron or flotation is the usual concentration method employed for the ores in the fine size range lt149 m different flotation routes are available i reverse cationic flotation of quartz ii direct anionic...

For Brazilian iron ore producers reverse cationic flotation is preferred to obtain high quality concentrates from silicate or The SiO2 silica particles are rendered hydrophobic by amine cationic collector in alkaline conditions while iron is depressed by the addition of starch...

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...

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 105-11 and the beneficiated ore is concentrated in the bottom fraction...

The cation thus formed is easily adsorbed on anionic sites of silica/silicate 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 angl 2 Materials and Methods...

An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate The process mineralogy analysis showed that the sulfur content reached 4621 and 8197 of the sulfur existed as elemental sulfur which was the major mineral in the residue and primarily existed as pellet aggregate and biconical...

However the magnetite proportion is less in the concentrate obtained by reverse cationic flotation Moreover the amounts of quartz and non-metallic minerals are significantly higher 35 and 49 respectively with the reverse cationic flotation which limits the use of this concentrate for further processing in electrometallurgy...

Flotation tests were conducted using cationic and anionic collectors and the results are presented in Tables 2-4 In the presence of cationic collectors ie Armoflote-17 and Liquid B-50 most of the silica and silicate minerals were floated in preference to barite reverse flotation However barite alone was...

Froth flotation of iron ores is one of the most widely used methods to upgrade iron ore into highgrade concentrat In recent years reverse cationic flotation of iron ores has been specifically...

Four types of cationic collectors were tested and evaluated for their performance in the reverse flotation of silica from the spiral preconcentrate of Kudremukh iron ore A stagewise flotation was conducted by adding the reagent in three stag Starch was used to depress hematite...

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...

that flotation has significant advantages when processing low-grade finely grained iron ores containing iron-bearing silicat The most common flotation route used for the beneficiation of iron ores is reverse cationic flotation Lin et al 2009 Filippov et al 2014 Flotation is the physic-chemical separation...

Froth flotation of iron ores is one of the most widely used methods to upgrade iron ore into high-grade concentrat In recent years reverse cationic flotation of iron ores has been specifically the subject of several studi Since quartz is the most common gangue mineral in iron ores understanding the behaviour of this mineral was...

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...

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-...

By reverse flotation in accordance with the present approach the silica of up to 12 percent and the iron of up to 140 percent contained in the ore can be each lowered to about 008 percent while by the direct flotation approach it is difficult to lower the silica content to 1 percent...

Flotation equipment technology screening922 Кб 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...

of silica Where silica is present the recovery rates of RO systems are typically limited because the solubility of silica in water is exceeded at about 150 mg/L This can result in the precipitation and deposition of amorphous silica and silicates with consequential RO membrane fouling and loss of...

Keywords Iron Ore Flotation Reverse Cationic Flotation Reverse Anionic Flotation Alumina Removal Phosphorus Removal 1 Introduction With the depleting reserves of high-grade iron ore in the world various beneficiation methods have been employed to process intermediate- and low-grade iron ore in an attempt to meet the rapidly growing...

The process is composed of desliming -10 181 m followed by reverse cationic flotation of kaolinite rougher scavenger at pH 5 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...

Separation of silica from pyrite cinder via reverse cationic flotation Wang Quanliang 1 2 and Feng Qiming 1 Sodium silicate 200g/t showed that the separation of silica from pyrite cinder by reverse flotation is possible and good selectivity can be...