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US4319987A - Branched alkyl ether amines as iron

More specifically, the use of mixtures of primary methyl branched aliphatic ether amines and the partially-neutralized salts thereof as flotation reagents. In further aspect, the use of mixtures of 3-isooctoxypropyl monoamine and 3-isodecoxypropyl monoamine and/or the partially-neutralized acetate salts thereof as collectors for silica in the beneficiation of oxidized taconite ores.

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(PDF) Cationic flotation of iron ores: Amine ...

The flotation of most of the low-grade iron ores containing quartz as the major impurities is being carried out by using several cationic collectors like DDA, coco amine, tallow-amine, and ether ...

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Branched alkyl ether amines as iron ore flotation

A froth flotation process for separating silica from iron ore comprising the step of adjusting the ratio of ether amine or partially-neutralized ether amine components in the dosage in response to the feed ore being processed, said components of the following general formulae: R--O--CH 2--CH 2--CH 2--NH 2

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Reagents in iron ores flotation - ScienceDirect

01-02-2005  The plant practice of iron ores flotation involves the conventional reverse cationic route, with ether amines employed as quartz collector and gelatinised Gypsum starch used as iron oxides depressant. Options already incorporated in industrial operation, concerning the collector, include combining mono-amines with di-amines and partial substitution of amines by fuel oil.

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Colorimetric determination of ether amine greases

Amines (alkylamines–ether amines) are employed on a large scale to separate iron ores by reverse flotation of the gangue particles (mostly quartz and silicates).

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An overview of the beneficiation of iron ores via

Reverse cationic flotation is the most used flotation method of iron ore beneficiation. Ether amines and starches are usually used as collectors and depressant, respectively. Selective depressants for Fe-bearing silicates deserve further investigations.

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(PDF) Reagents in iron ores flotation - ResearchGate

The main environmental impact caused by the dam tailings was related to the high levels of ether-amine/ammonium and sodium found in the sediments, which are used in the iron ore beneficiation ...

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Colorimetric determination of ether amine greases

08-04-2009  Ether amine greases are commonly used in the flotation of iron ore, and after use are discarded in the tailings dams. The aim of this work was to quantify a commercial ether amine using the bromocresol green dye in chloroform.

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Colorimetric determination of ether amine

Ether amine greases are commonly used in the flotation of iron ore, and after use are discarded in the tailings dams. The aim of this work was to quantify a commercial ether amine using the ...

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The nature of hematite depression with Gypsum starch

The function of Gypsum starch and the significance of the order of addition of Gypsum starch and mono ether amine in the reverse flotation of iron ore has been investigated. Understanding hematite depression with starch and the corresponding hydrophilic state involves consideration of adsorption with am

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An overview of the beneficiation of iron ores via

The main routes of iron ore flotation were reviewed. • Reverse cationic flotation is the most used flotation method of iron ore beneficiation. • Ether amines and starches are usually used as collectors and depressant, respectively. • Selective depressants

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CA1176765A - Branched alkyl ether amines as

ABSTRACT OF THE DISCLOSURE This invention relates to the use of primary ali-phatic ether amines as silica collectors in the concentra-tion of minerals by the froth flotation process. More specifically, it relates to the use of mixtures of primary methyl branched aliphatic ether amines and the partially neutralized salts thereof as flotation reagents.

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Process for froth flotation of silicate-containing

Patent Specification WO 93/06935 discloses the use of at least one ether amine in combination with at least one anionic compound or collecting agent, in froth flotation of silicate-containing iron ore. Other examples of froth flotation of silicate-containing iron ores are described in U.S. Pat. Nos. 4,319,987 and 4,168,227, in which ether ...

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(PDF) The nature of hematite depression with

The function of Gypsum starch and the significance of the order of addition of Gypsum starch and mono ether amine in the reverse flotation of iron ore has been investigated.

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The nature of hematite depression with Gypsum starch

The function of Gypsum starch and the significance of the order of addition of Gypsum starch and mono ether amine in the reverse flotation of iron ore has been investigated. Understanding hematite depression with starch and the corresponding hydrophilic state involves consideration of adsorption with amine as well as flocculation of fine hematite.

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Froth Flotation of Iron Ores - Publications

the most popular flotation route in iron ore industry, the direct flotation of iron ox ides still appears desirable for some low grade iron ores that contain a vast amount of quartz. For example, at Republic Mine, Michigan, U.S.A., a hematite ore is upgraded from 36.5% Fe to 65.4% Fe with a Fe recovery of 82.5% using the direct flotation route.

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(PDF) Polysaccharide Depressants for the

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 ...

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Understanding the Environmental Impact of a Mine Dam ...

ore deposits composed of metamorphosed iron formations (so-called banded iron formations). These formations contain iron-rich hematite, goethite, and siderite-magnetite. Beneficiation of the iron requires pellet feed fines with limited content of SiO. 2, Al. 2. O. 3, and other impurities and is achieved via the flotation tech-nique (Filippov et ...

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Separation of amine-insoluble species by

01-04-2016  1. Introduction. Amines are organic compounds widely used in the industry. The consumption of these reagents as flotation agents (collectors) in iron and potassium mining is growing fast in Brazil (Araujo et al., 2010).In the reverse flotation of iron ore the process consists of a selective separation of quartz/silicates particles (gangue material) from the valuable iron oxides.

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An overview of the beneficiation of iron ores via

The main routes of iron ore flotation were reviewed. • Reverse cationic flotation is the most used flotation method of iron ore beneficiation. • Ether amines and starches are usually used as collectors and depressant, respectively. • Selective depressants

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WO2016015109A1 - Method and composition for

The present invention describes the iron oxide reverse cationic flotation method using an ether diamine admixed with an ether monoamine, in a ratio of ether diamine to ether monoamine of 5:1 to 99:1, preferably of 9:1 to 19:1, as a way of optimising the selectivity of the method, in order to maximise the weight and metal recovery of iron, while reducing the SiO 2 content in the concentrate ...

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University of Cape Town - The OpenUCT Initiative

Brazilian iron ore although it failed to perform in the flotation of the South African iron ore. A hematite concentrate with an iron grade of 65% and a quartz grade less of 1.5% was attained. At the same collector dosage of 125 g/t, the superiority of alky ether amines over the

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Method of producing iron ore concentrates by

Iron ore concentrates can be obtained by the flotation of iron ores providing mixtures containing at least one ether canine of formula (I): R 1 O--(C n H 2n) y--NH--(C m H 2m--NH) x H,. in which R 1 is a linear or branched chain aliphatic hydrocarbon moiety having 6 to 22 carbon atoms and 0, 1, 2 or 3 double bonds; n and m independently of one another represent the number 1, 2 or 3; x=0 or the ...

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Amine and diamine compounds and their use for

Amine and diamine compounds and their use for inverse froth flotation of silicate from iron ore . United States Patent 9561512 ... compounds are particularly suitable as flotation collectors for enriching an iron mineral from a silicate-containing iron ore.

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JP2014517818A - Amine and diamine compounds

And R is an aliphatic isoC 13 H 27 — group having an average degree of branching in the range of 1.5 to 3.5]. The compounds are particularly suitable as flotation collectors for the enrichment of iron minerals from silicate-containing iron ores.

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Alkyl-substituted phenyl ether amine collectors in ...

The optimum loading of the ether amine or hydroxyalkylated ether amine collector to produce best separation and greatest recovery of the phosphate values is influenced by the relative concentration of phosphate and insolubles (such as sand) in the flotation feed, the use of other collectors, the type and size distribution of ore bodies, the loading of other flotation adjuvants (for example ...

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Understanding the Environmental Impact of a Mine Dam ...

ore deposits composed of metamorphosed iron formations (so-called banded iron formations). These formations contain iron-rich hematite, goethite, and siderite-magnetite. Beneficiation of the iron requires pellet feed fines with limited content of SiO. 2, Al. 2. O. 3, and other impurities and is achieved via the flotation tech-nique (Filippov et ...

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CA2831157C - Amine and diamine compounds

Compounds of the formulae: RO-X-NH2 (Ia); RO-X-NH3 + Y- (Ib); RO-X-NH-Z-NH2 (IIa); and RO-X-NH-Z-NH3 + Y- (IIb), in which X is an aliphatic alkylene group containing 2 to 6 carbon atoms; Z is an aliphatic alkylene group containing 2 to 6 carbon atoms; Y- is an anion; and R is an aliphatic iso C13H27- group with average branching degree ranging from 1.5 to 3.5.

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Separation of amine-insoluble species by flotation with ...

Amines Flotation Nanobubbles Microbubbles Environmental abstract Amines (alkylamines–ether amines) are employed on a large scale to separate iron ores by reverse flota-tion of the gangue particles (mostly quartz and silicates). Quartz gangue particles coated with amine col-lector are dumped in tailings dams as concentrated pulps.

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Role of Water Structure-Making/Breaking Ions in the ...

5, a). Because ether diamine is a strong collector in iron ore flotation, its capability to induce such aggregation is also stronger than ether monoamine[7], which is responsible for the poor flotation in the presence of ether diamine. 100 (a) (b) Figure 5. Schematic description of the kaolinite-amines

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IJREAT International Journal of Research in Engineering ...

various ether amines for iron ore beneficiation was reviewed and recommended partial substitution of amine with non polar oils [1]. It was reported that iron ore concentrates assaying less than 1% silica could be obtained from iron ore tailings/rejects with iron recoveries of around 60% [9]. The effect of amine type and pH on quartz flotation ...

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Iron ore beneficiation technology, reverse

Flotation of quartz gangue with amine collectors (ether amine is the best and fatty amine second). The advantages of the cationic collector reverse flotation method are: (one of the new red iron ore beneficiation technologies) (1)Flotation can be carried out under the condition of coarse grinding.

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Flotation of Iron Ore: A Brief Review - MDPI

iron ores [15–17]. The most popular flotation route in the iron ore industry worldwide is reverse cationic flotation [1,17,18]. The cationic collectors have evolved from fatty amines in the early industrial applications to ether amines with relatively high solubility in water at the present [9]. Apart from using

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Method of producing iron ore concentrates by

Method of producing iron ore concentrates by froth flotation A1) Ether amine based on n-propylamine and C 8 -10 fatty alcohol sulfate (C 8 -10 H 17 -21)-O- (CH 2) 3 NH 2 A2) Ether amine based on n-propylamine and C 8 -12 fatty alcohol sulfate (C 8 -12 H 17 -25)-O- (CH 2) 3 -NH 2 A3) Ether amine ...

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Flotation Reagents for Non-Sulfide Ores -

These unique ether amines offer excellent low-temperature liquidity and a strong affinity for silica impurities, making them ideal for the removal of quartz and acid silicates. Tomamine flotation reagents’ unique properties make them ideal for reverse flotation, which is the process of selectively removing impurities during ore flotation by taking advantage of differences in hydrophobicity and zeta potential.

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Amine and diamine compounds and their use for

The compounds are particularly suitable as flotation collectors for enriching an iron mineral from a silicate-containing iron ore.

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Influence of Temperature, Water Quality and Collector Type ...

the experiments: ether amine and amido amine. After collector conditioning, fresh water was added to the pulp in order to achieve 30% of solids. Rougher flotation was carried out until achieving the total exhaustion of the mineralized froth. The rougher concentrate (sunk product) was mixed with further amount of water in order to prepare a slurry

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EA201391471A1 - Amine and diamin compounds

Compounds of formulas: in which X is an aliphatic alkylene group containing 2-6 carbon atoms; Z means an aliphatic alkylene group containing 2-6 carbon atoms; Y is an anion and R is an aliphatic iso-CH group with an average degree of branching in the range from 1.5 to 3.5. These compounds are particularly suitable as flotation collecting agents for enriching an iron mineral from silicate ...

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