flotation of chromite and serpentine

Smith (1981) said that if the main gangue mineral of chromite ore is serpentine, it could easily float ... 4 has a beneficial effect on chromite flotation with an acidic pH. That is, sulfuric acid ...

Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. The selective flotation of chromite minerals of any chromite ore have some difficulties due to dissolved cations from gangue minerals. By this work, selective flotation of various chromite ores were studied to determine some of the features of …

Flotation of chromite and serpentine. 2007, Separation and Purification Technology. Show abstract. Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. A good knowledge of the flotation behaviour of chromite and the establishment of conditions for its selective separation from the …

From an ore feed grading 20.27% Cr2O3, a chromite concentrate of 28.71% Cr2O3 with recovery of 94.54 % could be obtained by flotation at collector dosage of 0.300 kg /t, neutral pulp (pH 9 ...

This can be attributed to the different settling velocities of denser chromite particles and lighter serpentine particles, Table 1. However, upon 10 mg/L starch addition for 50%:50% mixture and 14 ...

Micro-flotation results revealed that the addition of LY could efficiently limit the detrimental effect of serpentine on pyrite flotation with a maximum increase of pyrite recovery from 14% to 96% ...

The XRD results of the samples revealed that the samples were mainly composed of chromite and serpentine minerals with impurities in trace quantities (Fig. 1). For producing suitable feed material ...

The physico-chemical interactions among minerals such as olivine, chromite and serpentine; the most commonly present ions in solution such as Ca and Mg; and flotation reagents such as EDTA and oleic acid were investigated. The study was conducted via release tests, electro-phoretic measurements and microflotation of …

Serpentine has a point of zero charge (PZC) at pH value of 9.5 while sulphide minerals normally have PZCs below 7 [10]. Flotation of sulphide minerals is normally performed under weakly alkaline conditions at which the positively charged serpentine can interact with the negatively charged sulphide minerals through electrostatic attraction [5, …

In this paper, the floatability of chromite and serpentine fine particles by sodium oleate was investigated in-depth, aiming to …

Abstract and Figures. Application of selective flocculation using starch to separate chromite from serpentine has been investigated. It was determined that starch has a specific affinity towards ...

Selective flotation of chromite from serpentine was possible with sodium oleate and FSA or EDTA as modifiers under conditions of neutral pH. Other flotation studies have focused on a variety of technologies that are suitable for the selective recovery of fine chromite, including mechanical, column, and free jet flotation. ...

The results of single mineral flotation and grinding tests showed that while the floatability of chromite increased as a function of its angularity degree, a reverse trend was obtained for ...

Low grade chromite ore with less than 30% Cr2O3 was investigated with a view to enhance its utilization potential. The ore contained olivine, serpentine, and …

Process mineralogy of low-grade laterite nickel ore in Indonesia was systematically characterized and the beneficiation process of mineral components such as limonite, serpentine and chromite was studied on the basis of process mineralogy. The results show that the low-grade laterite nickel ore is a typical weathering sedimentary …

Therefore, it seems that the surface dissolution can be an effective method to make a difference on the surface properties of chromite and associated gangue minerals including serpentine (Mg, Fe) 3 Si 2 O 5 (OH) 4 and olivine (Mg, Fe) 2 SiO 4 as well as improving the flotation selectivity.

Keywords: Chromite; Flotation; Modifier; Separation; Serpentine 1. Introduction ... is a common accessory mineral of chromite; serpentine (antig-orite) belongs to the sheet …

Effect of particle shape properties on selective separation of chromite from serpentine by flotation. : Although many studies have been conducted on the …

I believe we have the reagents available here. The grain size are coarse, the particle size needed for liberation and disassociation of the chromite is approximately 300 microns. It looks like flotation is not the way to go with this sample we've had success doing the separation using gravity and its hardness, the fines being the serpentine gangue.

Separation by flotation of the (GL30 Olivine-M4 chromite) system at 3.3% chromite added with 150 mg/L CTMAB at pH 11 depending on the stirring conditions; (a) fraction of recovered particles in ...

The technique consisted of cationic flotation of chromite from a slime-free pulp acidified to pH 2.5 or lower using H2S04 modifier. Flotation results showed that ore containing serpentine as the primary gangue mineral was more amenable to concentration by this technique than ore containing the readily floatable olivine as the primary gangue ...

a selective froth flotation process for the treatment of chromite ores having low grade chrome spinels, zircon, staurolite, ilmenite, magnetite, garnet, quartz, epidote, olivine and alteration products as inclusions which comprises subjecting a pulp of such an ore to an initial blunging treatment in the presence of a soluble iiuosilicate-forming substance, …

Flotation of chromite and serpentine. Sep. Purif. Technol. (2007) Ü. Akdemir et al. Selective shear flocculation of chromite from chromite-serpentine mixtures. Colloids Surfaces A Physicochem. Eng. Asp. (1998) Z.-H. Li et al. Effect of serpentine and sodium hexametaphosphate on ascharite flotation.

The chromite crystals were subjected to restoration and dislocation in a serpentine ground mass thin section (XN, 4x10) 3.2 Flotation characteristics of high grade chromite Chromite Recovery% Figure 2 shows the chromite flotation recoveries as a function of various dosages of oleic acid at different pH values.

However, especially, Na-Oleate flotation of a chromite ore containing serpentine instead of olivine is very difficult because both minerals exhibit almost similar surface properties with chromite ...

Keywords: Chromite; Flotation; Modifier; Separation; Serpentine 1. Introduction ... is a common accessory mineral of chromite; serpentine (antig-orite) belongs to the sheet silicates [14]. In the ...

In this paper, the floatability of chromite and serpentine fine particles by sodium oleate was investigated in-depth, aiming to separation during mineral processing, i.e. to float …

Low grade chromite ore with less than 30% Cr2O3 was investigated with a view to enhance its utilization potential. The ore contained olivine, serpentine, and chrysotile as the gangue minerals.

The best chromite concentrates containing 42.1% Cr2O3 were obtained with a 76% recovery from a synthetic mixtures of chromite and serpentine under optimum test conditions, that is at pH 10.5, 5.10 ...

The Gora sample consisted primarily of chromite and olivine, changing to serpentine with a small amount of orthopyroxene. The olivine ranged in color from green to yellowish-brown. The chromite is liberated essentially in the minus 100-mesh fraction; however, a small amount of chromite remains locked in the minus 325-mesh fraction.

tion pulp on the flotation response of chromite and the most frequently associated gangue minerals, i.e. serpentine and olivine. One of these authors has reported the effect of ag-ing while another studied the effect of magnetic field on the flotation of chromite. It has also been shown that the ores from different origins behave differently ...

Different chromite ores from South Africa were made flotation using the anionic collector, A825 (petroleum sulfonate), after conditioning with H2SO4 at low pH values in the range of 1 and 3 ...

However, especially, Na-Oleate flotation of a chromite ore containing serpentine instead of olivine is very difficult because both minerals exhibit almost similar surface properties with chromite ...

Chromite occurs generally with olivine and serpentine. Chromite can be also found with magnetite with a less frequency. For the ores in which chromite occurs with magnetite, low ratio and grade problems appear. ... Effect of pH on the flotation of chromite concentrate pH Analysis of Concentrate Cr203 4.5 5.5 6.5 Recovery (%) (%) 57.53 56.80 41. ...

Odisha state is the major reserve of the chromite ore. Due to the extensive applications, high-grade chromite ore is getting depleted day by day. Now it is a challenge for the industry to utilize these low-grade ores and tailings. Several attempts were taken to upgrade the low-grade chrome ores and tailings using different gravity separation …

Fig. 1 The flotation test procedure. Experiments consisted of chromite flotation and after that 3 cleaning steps. Chemicals used in experiments were A825 (Cynamid Pertroleum Sulphonate) as collectors, DF250 as frother and sulfuric acid (H2SO4) to ensure pH value desired. Pulps were conditioned 5 min and 1 hour at pH value of 1, 2 and 3.

However, especially, Na-Oleate flotation of a chromite ore containing serpentine instead of olivine is very difficult because both minerals exhibit almost similar surface properties with chromite ...

This paper reviews the literature relating to the flotation of chrome spinel and presents a considered approach to the development of a robust flotation method to separate chrome spinel from ilmenite. Contributor (s): G W Heyes, W J Bruckard, L K Smith. Return to parent product. Flotation of Chromite - A Review With Applications to Upgrading ...

The objective of current work is to study the effect of pH, collector concentration, type and concentration of modifiers on the flotation behaviour of chromite and establish the conditions where selective flotation from gangue minerals (i.e. …

Low grade chromite ore from Landhi Raud in the assay range of 27-28 % Cr, 03 has been upgraded by gravity based processing methods to a concentrate containing 43-44 % er203 with a recovery of 65 %. Recovery of chromite from the fines generated during the crushing and grinding of the ore has been attempted by the flotation technique.