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 …
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 ...
Flotation, in mineral processing, method used to separate and concentrate ores by altering their surfaces to a hydrophobic or hydrophilic condition—that is, the surfaces are either repelled or attracted by water. The flotation process was developed on a commercial scale early in the 20th century to
In this paper, the floatability of chromite and serpentine fine particles by sodium oleate was investigated in-depth, aiming to …
The only ore of chromium is chromite ore which ferrochromium and metallic chromium are produced from it by extracting processes. South Africa is the largest producer of …
It is observed that percentage recovery of Cr2O3 depends upon tilt angle, water flow rate and pre-heat treatment of chromite ore. Pre-heat treatment of chromite ore plays a vital role in gravity ...
Keywords: PGM extraction, oxidized ore, flotation, ... The cyanidation process, which has proven to be effective for extraction of gold and silver by direct leaching of oxidized ores and concentrates, achieved low recoveries when applied to oxidized PGM ore (Musonda, 2015). ... Chromite and magnesiochromite were also identified as trace ...
DOI: 10.1016/S0892-6875(99)00090-4 Corpus ID: 96710703; A new flowsheet for processing chromite fines by column flotation and the collector adsorption mechanism @article{Gney1999ANF, title={A new flowsheet for processing chromite fines by column flotation and the collector adsorption mechanism}, author={Ali G{"u}ney and G{"u}rol …
Keywords: Ultra-fine chromite tailings, Magnetic separation, Characterization, Chromite 1. Introduction Chromite recoveries is a major concern particularly in processing of finely disseminated ores due to its inherent complexities. The gravity separation process is the main beneficiation process used to recover chromite mineral. However,
A process mineralogical study based on three texturally and mineralogically different chromite-bearing ore types at the Nkomati nickel mine was undertaken, with focus on chromite. ... South Africa) were lowered into the cell, was maintained throughout the flotation process. Concentrates were collected at 15 s intervals for 1 min (concentrate 1 ...
The formation of chromium ore deposits is a complex process that involves the interplay of various geological, tectonic, hydrothermal, and geochemical factors over long periods of time. ... magnetic separation, and flotation. These methods are used to separate chromite from other minerals and gangue, and to concentrate the chromite …
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 …
Hallimond tube flotation studies on chromite ore gangue minerals were performed. The particular minerals studied were olivine, diopside and hedenbergite. The …
Following liberation by comminution, froth flotation is the primary process for mineral separation. ... O'Connor, C.T. An investigation into the role of froth phase in controlling chromite in the flotation of …
Some amounts of magnetite and chromite exist in the ore together with sulphide and oxide type nickel minerals. The ore sample contains 1.32% Ni, 10.79% SiO 2, 78.39% Fe 2 O 3, 1.3 g/t Ag, and 1.0 g/t Au. The ore sample is constituted of about 70% magnetite, 15% sulphide minerals, and 5% chromite and iron oxides, as well as 10% …
Chromite deposits occur in the form of discontinuous bands, lenses, and pockets in different host rock associations. Chrome ore beneficiation. Most of the chrome ores around the world are beneficiated by gravity concentration techniques. A conventional chromite ore beneficiation process plant (Figure 3) consist of two sections:
Flotation tests of Pandora UG-2 chromite ore using A 825 in presence of H 2SO 4 were carried out and the concentrates of about 42.5 % Cr 2O3 were obtained from calculated average head grade of 29.88 % Cr 2O3, 15.45 % SiO 2. Recovery ratio of chromite increased with increasing pH value and conditioning time. Similar
It should be added that segregation of laterite ores prior the flotation process has shown some improvement in upgrading nickel. The segregation process relies on the addition of calcium chloride or sodium chloride and carbon allowing the formation of nickel and iron chlorides at temperatures between 900 and 1150 °C. …
At present, we can use the flotation process to recover the chromite with fine grain size (-100um) after the gravity separation. The results show that Mg2+ and Ca2+ can inhibit the chromium ore ...
Chromite is the predominant gangue mineral reported to the concentrate of PGE flotation of UG2 ore, which causes serious downstream processing problems, and it seeks a good PGE grade with less ...
A process mineralogical study based on three texturally and mineralogically different chromite-bearing ore types at the Nkomati nickel mine was undertaken, with focus on chromite. Chromite is a by-product of the Ni-Cu-Co-PGE ore at Nkomati Nickel mine. These being the PCMZ_MG (medium-grade Ni-Cu sulphide silicate ore with …
Thus, flotation may be a process necessary to separate the finest fractions or possibly, when the difference in the specific gravity of the minerals is small.Much work has been done on the fundamentals of chromite flotation [7]. The importance of charged metal hydroxy-species in such flotation has been well demonstrated [8], [9], [10].
domestic chromite ores has been feasible only under the abnormal economic conditions set up by international war. Under such con ditions with import supplies cut off there then …
The US Bureau of Mines compared column flotation using either fine or coarse bubbles with conventional flotation on a Montana chromite ore. On deslimed ore, fine-bubble column flotation produced a 44.7% Cr2O3-grade rougher concentrate with 87% recovery, compared with 43.8% and 43.5% Cr2O3-grade rougher concentrates with 85% and 77% …
Gravity separation relies on the difference in density between chromite and other minerals, while magnetic separation uses magnetic properties to separate the ore. Flotation involves the use of chemicals to selectively separate chromite particles from the rest of the ore. ( Chrome Plant Process Flow Explained - Flotation machines )
Experimental result indicates that sodium oleat as a collector in alkaline medium plays very important role for the flotation process of low grade chromite ore [8]. Flotation is a very good ...
The selectivity of chromite mainly depends on its grade, embedded particle size, and gangue composition. Currently, mineral processing methods include gravity separation, magnetic separation, electrical separation, flotation, roasting magnetic separation, etc. Gravity separation+flotation process
DOI: 10.1016/J.MINENG.2003.08.001 Corpus ID: 95546178; Effects of frother type and froth height on the flotation behaviour of chromite in UG2 ore @article{Ekmekci2003EffectsOF, title={Effects of frother type and froth height on the flotation behaviour of chromite in UG2 ore}, author={Zafir Ekmekci and Dee Bradshaw …
The beneficiation studies of Suresh (1981) illustrate that low-grade chromite ore of 16%–25% Cr 2 O 3 of Sitampundi area of India, cannot be upgraded by using …