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DOI: 10.1016/J.MINENG.2010.05.009 Corpus ID: 93109618; Investigation on alternative depressants for iron ore flotation @article{Turrer2010InvestigationOA, title={Investigation on alternative depressants for iron ore flotation}, author={H. D. G. Turrer and Ant{^o}nio Eduardo Clark Peres}, journal={Minerals Engineering}, year={2010}, volume={23}, …
In reverse flotation of iron ore, quartz, the major impurity, is floated using mono and di-ether amines, which also act as frothers during reverse flotation. Neutralization with acetic acid is done to increase the solubility of amines in water which reduces the effectiveness of the amine collectors; hence, ether amines are frequently used with ...
Maximum adsorption for all the four starches with hematite occurs at the pH value 5–9. However soluble starch is found to be the better depressant at slightly alkaline pH. The flotation of natural occurring banded iron ore using different starches has indicated that it is possible to achieve an iron grade of 63–65% Fe with 85–88% recovery.
using various reagents, such as pH modifiers, depressants, activators, and collectors. Since the early stage of technology development for iron ore flotation in the 1930s, the following ... iron ore using oleic acid or its soaps is usually performed in a strongly alkaline environment (i.e., above pH 11). Fuerstenau and Cummins [28] …
For the direct flotation system of iron-containing silicate type iron ore, fluorosilicate and sulfhydryl are usually used as depressants, but the toxicity and erratic restrict their widely use [15
3.1 Coal pyrite depressants. Although the contact angle is smaller and the induction time of coal pyrite is longer than those of coal (Qi et al. 2019), coal pyrite has better floatability than ore pyrite due to the doping of C atoms.Efficient depressants are needed to inhibit the floatability of pyrite in the flotation separation of coal and pyrite.
Sodium Hydrosulfide (NaSH) Sodium Hydrosulfide (NaSH) is an economical form of reactive sulfur that is typically a light-yellow colored solution. Hydrogen Sulfide (H2S), a toxic gas, is evolved upon contact of NaSH with acids. NaSH is mildly corrosive to carbon steel and cast iron. Stainless steels are very resistant to corrosion.
The specifications of sodium silicates coded as A, B, C, and D in the increasing order of modulus of sodium silicate and the decreasing order of total solid content are shown in Table 3. Sodium ...
Flotation, iron ore, depressants, starch, dextrin, CMC, humic acid INTRODUCTION Iron corresponds to approximately 6% of earth's crust composition (McDonough and Sun, 1995). It is the most used ...
DOI: 10.1016/J.MINENG.2018.05.031 Corpus ID: 103081310; Investigation of the interaction mechanism of depressants in the reverse cationic flotation of complex iron ores @article{Veloso2018InvestigationOT, title={Investigation of the interaction mechanism of depressants in the reverse cationic flotation of complex iron ores}, author={C. H. …
1. Introduction. According to Peres and Corrêa (1996) PERES, A. E. C., CORRÊA, M. I. Depression of iron oxides with cornstarches. Minerals Engineering. v.9, n.12, p.1227-123, 1996., cornstarch has been Brazil's default depressant for iron ore since 1978.Modified cornstarches are composed of amylopectin (70-80%) and amylose (20-30%) without …
The iron-bearing minerals most commonly found in nature and economically exploited are magnetite [Fe 3 O 4 ], hematite [Fe 2 O 3 ], goethite [FeO (OH)] and siderite …
Among organic depressants, starch and glue find widest application. If added in sufficient quantity starch will often depress all the minerals present in an ore pulp. Among the inorganic depressants, lime is the cheapest and best for iron sulphides, while zinc sulphate, sodium cyanide, and sodium sulphite depress zinc sulphide.
Although these eco-friendly depressants showed promising metallurgical results, several gaps still need to be addressed, notably in surface analyses and their adsorption mechanisms. ... Iron ore slimes typically consist of iron, alumina, and silica at a wide range of sizes and densities. The marginally varying density components (iron …
The typical feed to a flotation system in the iron ore industry consists of particles in the size range between 10 µm and 300 µm. The slimes fraction (<10 µm) are removed using hydrocyclones prior to flotation and the top size is limited to 5–10% greater than 150 µm. Flotation is performed in circuits consisting of mechanical cells ...
Depressants and Flocculants in Iron Ore Beneficiation - Starches and Starch Derivatives. This article discusses the effect of physical and chemical …
The flotation performance of certain iron ore types is enhanced with the use of ether di-amines in combination with ether mono-amines. Amine is partially replaced by some kind of fuel oil in some concentrators. ... Starches are the universal depressants of iron oxides in the flotation of iron ores. Starch may be extracted from several vegetable ...
With the depleting reserves of high-grade iron ore in the world, froth flotation has become increasingly important to process intermediate- and low-grade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century's practice in the iron ore industry, froth flotation has been established as an …
In RCF of iron ore, using an amine-based cationic collector (alkyl ether amine) can increase starch adsorption on the quartz particles, ... Investigations on different starches as depressants for iron ore flotation. Miner. Eng., 49 (2013), pp. 1-6, 10.1016/j.mineng.2013.05.004.
The flotation of natural iron ore indicated that the maximum iron recovery can be achieved by using soluble starch as the depressant. As high as 89.6% of iron recovery with 63.8% Fe could be achieved at a starch concentration of 400 g/t.
DOI: 10.1016/J.MINENG.2013.05.004 Corpus ID: 96941551; Investigations on different starches as depressants for iron ore flotation @article{Kar2013InvestigationsOD, title={Investigations on different starches as depressants for iron ore flotation}, author={Bhagyalaxmi Kar and Hrushikesh Sahoo and Swagat S. Rath and Bisweswar …
TURRER H D G, PERES A E C. Investigation on alternative depressants for iron ore flotation [J]. Minerals Engineering, 2010, 23(11/12/13): 1066–1069. Article Google Scholar LIU Ai-guo, WU Rong-chang, ESCHENAZI E, PAPADOPOULOS K. AFM onhumic acid adsorption on mica [J]. Colloids and Surfaces A: Physicochemical and Engineering …
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 on the reverse flotation …
Recovery of iron values from the Barsua iron ore slimes containing 56% Fe, 4.8% SiO 2, 7.2% Al 2 O 3 and 7.0% LOI by the addition of synthetic colloidal magnetite and oleate colloidal coating followed by high gradient magnetic separation technique was investigated. The effects of concentration of colloidal magnetite, pH, and magnetic field …
Starch, dextrin, sodium silicate (SS), and recently sodium co-silicate (SCS) are the most known depressants for the depression of iron oxides through the traditional reverse flotation.
Solvay's depressants are employed in diverse applications. For instance, they are used in copper-molybdenum separations, where they assist in the depression of copper and iron sulfides. Another use is in the flotation of simple metal sulfides and complex polymetallic-bearing ores, where they depress iron sulfides such as pyrite and marcasite.
The recovery of iron from the screw classifier overflow slimes by direct flotation was studied. The relative effectiveness of sodium silicates with different silica-to-soda mole ratios as depressants for silica and silicate bearing minerals was investigated. Silica-to-soda mole ratio and silicate dosage were found to have significant effect on the …
Removal of quartz from iron ore was accomplished industrially via an anionic reverse flotation technique. However, in that kind of flotation, the interaction of the flotation reagents with the ...
Starch is widely used as the depressant in iron ore flotation. The present paper attempts to highlight different facets of starch as an iron ore depressant.
Out of several reagents used in iron ore reverse flotation, depressants play a crucial role in selectively making the iron oxides hydrophilic and prohibiting them from …
This work describes the concentration of iron ore slimes on a pilot scale by using a 500-mm diameter flotation column and a novel collector, which renders the use of a depressant unnecessary. The pilot column was operated in series with the industrial plant Vargem Grande 2 (Iron Quadrangle, Brazil) receiving, as feed, part of the underflow from …
Review of reverse flotation of iron ore is presented with a focus on the polysaccharide depressants used and the corresponding adsorption phenomena. Iron oxide minerals have a special affinity for starch and other polysaccharides, and this special property facilitates their depression during the reverse cationic flotation of silica with ether …
Review of reverse flotation of iron ore is presented with a focus on the polysaccharide depressants used and the corresponding adsorption phenomena. Iron …
Nowadays all Brazilian iron ore concentrators use starch as iron oxides depressant. This study evaluated the application of other depressants, which are commonly used in other flotation systems ...
Froth flotation is an effective method to recover fine iron minerals, and numerous investigations have been carried out on the recovery of refractory low-grade iron ore, especially for fine ...
X-MOL. A digital twin dosing system for iron reverse flotation. Journal of Manufacturing Systems ( IF 12.1 ) Pub Date: , DOI: 10.1016/j.jmsy.2022.03.006. Dingsen Zhang, Xianwen Gao. Flotation is an essential process in beneficiation production. The amount of flotation reagent has a significant influence on the quality of the product.
1.. IntroductionIron ore export plays a relevant role in the Brazilian trade flow. Brazilian concentrators employ cationic reverse flotation to concentrate iron ore fines below 105 μm.The commonly used reagents are corn starch and ether amine, respectively, depressant and frother/collector (Araujo et al., 2005).The use of depressant blends is not …
The relative effectiveness of sodium silicates with different silica-to-soda mole ratios as depressants for silica and silicate bearing minerals was investigated. Silica-to-soda mole ratio and ...
