These studies are of importance since mono ether amine, used as a quartz collector in the reverse flotation of iron ore, also has an affinity towards hematite. Captive bubble contact angle measurements were performed to determine the role of starch, and the significance of the order of addition in the reverse flotation of iron ore [15]. Micro ...

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 …

The invention relates to the use of water-miscible polyols containing two or three hydroxyl groups for improving the collector properties of collector compositions for reverse iron ore flotation comprising at least one alkyl ether amine of formula (I) and/or alkyl ether diamine of formula (II), R 1 ‑(O‑A)‑NH 2 (I)R 2 ‑(O‑A)‑NH‑R 3 ‑NH 2 (II) wherein: r 1 Is a …

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 …

US 4422928 (Exxon Research and Engineering, publication date 27 December 1983) reveals a froth flotation process for separating silica from iron ore employing a liquid aliphatic ether amine of the formula R-0-(R1-0),-CH2-CH2-CH2-NH2 in which R is an aliphatic methyl branched radical having nine carbon atoms, R1 is ethyl or propyl and z is …

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 …

The reverse cationic flotation of siliceous iron ore containing dolomite is a current challenge in some mines of the Quadrilátero Ferrífero - Brazil, since the starch …

The two anionic flotation routes developed by Hanna Mining and Cyanamid, i.e. direct anionic flotation and reverse anionic flotation routes, are also being used in the iron …

Introduction. Flotation has been viewed as the most effective solution, both technologically and economically, to upgrade iron concentrates [1].During this process, selective adsorption of collectors on desired mineral surface plays a key role in recovering valuable mineral from gangue [2].These days, with the increasing demand for steel, …

The flotation routes viable for use in iron ore concentration are direct flotation of iron oxides and reverse quartz flotation, either via the anionic route after surface activation or the cationic one (Araujo et al., 2005; Filippov et al., 2014). The reverse cationic flotation of quartz is the most widely utilized in the beneficiation of low ...

Alkyl amines, alkyl diamines, alkyl polyamines, ether amines, and ether polyamines, neutralized with C3-24 carboxylic acids have improved fluidity and in some cases form stable dispersions in water, and are effective in froth flotation of impurities from ore. In particular, the removal of siliceous impurities from iron ore at high pH is significantly …

A large concentrator of iron ore, in Brazil, operates its flotation circuit using as quartz collector a combination of ether monoamine and ether diamine. The proportion of diamine in the collector blend varies from 25% to 50%, depending on the ore type and also on the specification of the product (pellet feed for blast furnace or direct reduction).

The flotation procedure, which included the introduction of 15 g/t of the collector before the start of flotation, and the addition of 5 g/t of the collector in combination with a microbubble dose ...

We claim: 1. A process for enriching an iron mineral from a silicate-containing iron ore by carrying out, at a pH of 8-11, a froth flotation in the presence of a silicate collecting agent containing an ether amine, and a depressing agent for the iron mineral, wherein the collecting agent comprises a combination of at least one primary …

FLOTATION OF IRON ORE EFFECTIVE ON THE OVERFROTHING PREVENTION ALBINO, K. I. P., TOLEDO, D.B., LIMA, O. A. ... When it comes to the flotation of iron ore, it is widely known that amine derivative

Collector and process for reverse froth flotation of iron ore. This invention relates to use of a water-miscible polyhydric alcohol having two or three hydroxyl groups for improving the collector performance of a collector composition for the reverse iron ore flotation comprising at least one alkyl ether amine of formula (I) and/or alkyl ether diamine of …

In reverse flotation, quartz, the major impurity in the iron ore, is floated using ether amines, and iron oxide minerals are depressed using depressants such as starch. It is …

In this work, the simultaneous effects of Ca²⁺ and Cl⁻ ions in an aqueous solution at pH 10.5 on the flotation of quartz (the main impurity in itabiritic iron ore) and hematite by starch and ...

EP2 696 985B1 3 5 10 15 20 25 30 35 40 45 50 55 Description [0001] The present invention relates to a process for enriching an iron mineral from a silicate-containing iron ore by carrying out an inverse ore flotation process using alkyl ether amines and / …

List of Figures Figure 3.1: Simplified flotation-scavenger circuit at Plant A .....42 Figure 3.2: Fine and low-grade hematite ore beneficiation process flowsheet (Mariani and

When it comes to the flotation of iron ore, it is widely known that amine derivative compounds are the main collectors used to remove silicate from the ore mineral. Due to pulp conditioning and flotation pH´s and due to the amine hydrolysis and dissociation characteristics the amine derivatives compound act both as collector and

In the reverse flotation of iron ore, quartz — the impurity — is floated using mono and di-ether amines, and hematite is depressed using polysaccharides such

... The main conclusion is that the proper selection of a cationic collector greatly depends in the ore mineralogy and process conditions. Papini et al. (2001) …

The reverse cationic flotation of siliceous iron ore containing dolomite is a current challenge in some mines of the Quadrilátero Ferrífero - Brazil, since the starch adsorbs on sites containing Ca and Mg species, previously adsorbed and/or precipitated on the quartz surface, thus preventing the adsorption of the collector (amine), and …

A well liberated Brazilian iron ore was amenable to reverse cationic flotation, whereas, the texturally complex South African iron ore did not respond well to reverse cationic flotation. Alkyl ether amines proved to be superior to quaternary amine compounds in the flotation of quartz from hematite.

3.. Cationic collectorsPrimary fatty amines, utilised in the pioneer USBM process, are no longer employed in the flotation of iron ores. They were modified with the insertion of the polar group (O–CH 2) 3 between the radical R and the polar head NH 2 of the primary amine. Due to the presence of the covalent bond C–O, characteristic of the …

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 …

—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 …

1. Introduction Reverse cationic flotation is currently the most widely used flotation route in the iron ore industry.

These results also agree with Filippov et al. [2] that also showed better flotation performance for iron ore/silicate systems using mixture of mono and diamine, attributing it to better ...