1. Introduction. With the over-depletion of high-grade iron (Fe) ore deposits, froth flotation has become the most important mineral separation technique in processing of medium-grade and low-grade iron ores (Rocha et al., 2010, Quast, 2017, de Medeiros and Baltar, 2018, Kumar et al., 2018).Medium-grade and low-grade iron ores are commonly complex …
11 Table 1. MAGNETIC SUSCEPTIBILITIES OF MINERALS (in alphabetic order) by Sam Rosenblum and I. K. Brownfield (side tilt: 15 degrees; size range: 125-150 micrometers)
magnesite from dolomite, we could fully utilize both the tar-get mineral (magnesite) and the gangue mineral (dolomite) [7]. flotation is a mineral separation method that is more widely used than gravity separation, magnetic separation, electrostatic separation, and chemical separation [8–10]. This
Under the optimal roasting and grinding-magnetic separation conditions (roasting at 800 °C for 15 min, then separation with a magnetic field intensity of 119.4 kA/m and a grinding fineness where 88% of the particles were smaller than 38 μm), the iron recovery could be obviously improved when a pre-oxidation process was applied (From Fig. 5 ...
The effect of magnetic field strength on the magnesite-dolomite separation was studied at a constant drum speed, 40 rpm ( Fig. 2 and Table 3).
The dolomite particles are then floated to the surface, leaving behind the impurities. Magnetic separation: Magnetic separation is a process in which a magnetically susceptible material is extracted from a mixture using magnetic force. This method is used to separate the iron and other magnetic impurities present in the dolomite ore.
Accordingly, GG selectively adhered onto dolomite due to its higher affinity towards Ca 2+, thereby prohibiting the following NaOL adhesion and giving rise to the selective depression of dolomite flotation. A conceivable separation model of magnesite and dolomite was displayed in Fig. 23. Download : Download high-res image (357KB)
Magnetic separation of magnesite and dolomite has been carried out by using induced M roll magnetic separator. A magnesite concentrate of 1.12% CaO with 46.02% yield was ed obtained from a feed of 5.73% CaO. In the ore mineralogy, dolomite is associated with goethite, whereas, magnesite is with hematite and magnetite. ...
In this work, the synergistic effect of hydrochloric-acid etching and inhibitors on the flotation separation of magnesite and dolomite in the sodium oleate (NaOL) system was studied. Flotation tests revealed that the synergistic effect of acid etching and sodium hexametaphosphate, sodium alginate, and sodium lignosulfonate on the separation of ...
The separation of magnesite from dolomite was studied by flotation tests, X-ray photoelectron spectroscopy (XPS), and zeta potential measurements in the presence of calcium ion (Ca2+) dissolved from dolomite. Sodium oleate (NaOL) was used as collector, and sodium carbonate (Na2CO3) and sodium hexametaphosphate (SH) were used as regulators. The …
processing methods based on AVM properties have been used: magnetic separation [8], dense medium separation [1,8,11–13], electronic sorting techniques (when iron and titanium oxides are AVMs) [1,8], ... suggested that bacteria could be used in the selective separation of dolomite from AVMs. 3.2. Contact Angle
A dry magnetic separation technique was used to separate dolomite from magnesite. The magnetic separation of the sample resulted in a magnesite concentrate product assaying 1.12% CaO with 46.02% ...
Using a magnetic separation result, the beneficiation process was conducted with additional gravity separation for zircon to produce a valuable mineral concentrate. The process resulted in three kinds of mineral concentrates (ilmenite, REE-bearing mineral, and zircon). The content of ilmenite increased from 32.5% to 90.9%, and the total rare ...
Magnetic and gravity separation tests were carried out on the Medium grade zircon standard (MGZS) to produce a monazite concentrate at Eramet Ideas laboratory. Magnetic separation at 1.5 teslas intensity resulted in the …
In this paper, the chelating reagent EDTA is introduced to eliminate the adverse influence of calcium species and to restore the selectivity of magnesite-dolomite separation …
The results show that sodium hexametaphosphate can better inhibit dolomite and realize the separation of Ca and Mg, followed by the inhibitory effect of water glass and sodium fluorosilicate.
Dolomite from Sterling Hill Mine in New Jersey, the gangue min-eral investigated, was obtained from Ward's Science (U.S.A.). ... steps (such as gravity and/or magnetic separation) were conducted prior to surface chemistry and flotation experiments. Since these methods are particle size dependent, mineral samples were first ...
The separation of magnesite from dolomite was studied by flotation tests, X-ray photoelectron spectroscopy (XPS), and zeta potential measurements in the presence of calcium ion (Ca2+) dissolved from dolomite.
The Abu Tartur phosphate deposit is characterized by the presence of ferriferous dolomite, containing 60 to 70% of MgO, which allows the use of magnetic separation to reduce the MgO content of certain fractions.
The main gangue species was fluorite with small amounts of dolomite and amphibole. Due to the weak magnetism of hematite and rare earth minerals, magnetic separation has low efficiency. However, magnetization roasting-magnetic separation is an …
2. High gradient magnetic separation method. A high-intensity magnetic field is used to create differences in the magnetic properties of dolomite and calcite, thereby achieving their separation.
This inspired us to purify pyrolysis slag by magnetic separation and flotation method. The results show that when the grinding particle size of −0.040 mm accounts for 80.1 %, the content of Pb and Zn in pyrolysis slag decreased to 0.32 % and 0.17 %, respectively, by only using the magnetic separation method.
Effect of depressants on associated minerals of Mg carbonates through flotation separation (in all conditions, dolomite recovery was around 90%). ... magnetic separation [8], dense medium.
High gradient magnetic separation method. ... It should be noted that the separation of dolomite and calcite is a complex task and successful separation depends on the specific characteristics of ...
There are mainly gravity separation, flotation and magnetic separation, which not only improve the purity of dolomite, but also reduce the impact on the environment by minimizing the generation of waste materials. …
The magnetic separation tailings of saprolite laterite ore containing magnesium processed by roasting and magnetic separation are used as raw materials, and the product of magnesium oxide was obtained by the process of sulfuric acid leaching, removing iron, precipitating magnesium and roasting. The effects of sulfuric acid concentration, leaching …
Attrition scrubbing of this size cut followed by a combined flotation-magnetic separation circuit, final sand concentrates assaying 0.0059% Fe 2 O 3 and 0.015% Al 2 O 3 was obtained with an ...
A dry magnetic separation technique was used to separate dolomite from magnesite. The magnetic separation of the sample resulted in a magnesite concentrate product assaying 1.12% CaO with 46.02%...
Magnesium is widely used in varieties industrial sector. Dolomite is one source of magnesium besides seawater. The extraction of magnesium from dolomite ores can be done by leaching process. In this work, the dolomite leaching to extract magnesium by hydrochloric acid was investigated. The leaching experiments were performed in a spherical glass batch reactor …
The flotation separation of magnesite from calcium-containing minerals has always been a difficult subject in minerals processing. This work studied the inhibition effects of carboxymethyl cellulose (CMC), sodium lignosulphonate, polyaspartic acid (PASP) and sodium silicate on flotation behaviors of magnesite, dolomite and calcite, providing guidance for the …
Effect of depressants on associated minerals of Mg carbonates through flotation separation (in all conditions, dolomite recovery was around 90%). ... magnetic separation [8], dense medium.
In this work, fine magnetite was used as a magnetic seed to enhance the separation efficiency of fine hematite from quartz during reverse micro-flotation. Gradual increases in hematite recovery and iron grade were accomplished with increasing magnetite content, whereas the iron content in quartz reject decreased. ... calcite and dolomite from ...
2.1 Introduction. The differences in magnetic susceptibility can be utilized to separate a valuable mineral from its gangue through the magnetic separation method. Similar to other materials, …
The Abu Tartur phosphate deposit is characterized by the presence of ferriferous dolomite, containing 60 to 70% of MgO, which allows the use of magnetic separation to reduce …
Dolomite, a prominent calcium-bearing gangue mineral found in carbonate-type zinc oxide ores, poses a significant challenge for effective flotation separation alongside smithsonite due to their highly similar surface properties. The present study explores the potential of 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctanoic acid (2-DMPT) as a collector for the …
Removal of ferriferous dolomite by magnetic separation from the Egyptian Abu Tartur phosphate ore. P. Blazy, E. Jdid. Published 1 February 1997. Environmental Science, …
