197-204_Dobbins:text. DOBBINS, M., DOMENICO, J., and DUNN, P. A discussion of magnetic separation techniques for concentrating ilmenite and chromite ores. The 6th International Heavy Minerals Conference 'Back to Basics', The Southern African Institute of Mining and Metallurgy, 2007.

Chromite ore processing tailings and low-grade manganese ores are typically considered waste due to their limited or negligible utility, leading to environmental and storage concerns. Researchers globally have explored various methods to utilize or upgrade these wastes, particularly because dumping chromite ore has been linked to …

From 1942 through 1944, production from the Chrome Queen mine totaled 6,650 tons of ore averaging 40 to 42% chromium oxide. Past investigations have identified 31 deposits at Red Mountain that …

All mines were located in the hilly area and chromite was extracted through underground mining. Four-fifth (82.4%) of the mines were working in two shifts and wages for labourers extended from ...

Chromite (Cr) occurs exclusively in mafic and ultramafic igneous rocks (Papp and Lipin, 2006).Although some Cr-based minerals such as crocoite (PbCrO 4), vauquelinite (Pb 2 Cu[CrO 4][PO 4]), uvarovite (Ca 3 Cr 2 [SiO 4] 3), and merumite (4(Cr,Al) 2 O 3 ·3H 2 O) are well known, chromite (FeCr 2 O 4) is the only one that is a …

Chromite is used in high-temperature applications, such as blast furnaces and molds for firing bricks, because it retains strength at high temperature. Chromium is also vital for good health. Insufficient amounts result in glucose intolerance in humans. Organ meats, mushrooms, wheat germ, and broccoli are all good dietary sources of chromium.

The early smelting techniques used in the Rustenburg area ... Patent Dry Chlorination of PGM Bearing Chromite ... more economical and ecological way of metals obtaining compared to mining from ...

The procedures used for the analysis of chromite were designed so that they could be performed by techniques and with reagent solu­ tions similar to or identical with those used for silicate rocks. Most of the procedures are the same as those used in rapid analysis of silicate rocks; a number of the procedures have, however, been modi­ ...

We are Asia's largest Chrome Ore deposit mines and use smart mining techniques to extract high quality Chrome Ore, sustainably. We mainly produce 3 grades of Chrome Ore - High Grade Chrome Ore (>52% Cr2O3 Grade), Medium Grade Chrome Ore (40-52% Cr2O3 Grade) and Low Grade Chrome Ore (<40% Cr2O3 Grade), and supply Chrome …

ISSN (Online) - 2349-8846. Mining Without Consent. Chromite Mining in Manipur. Franky Varah. Vol. 49, Issue No. 25, 21 Jun, 2014. Franky Varah ( akyvarah@gmail) is a doctoral scholar at the ...

Beneficiation is a crucial step in the chrome plant process flow, as it involves the separation of chromite from other minerals present in the ore. Various techniques, such as gravity separation, magnetic separation, and flotation, are used to achieve this separation. Gravity separation relies on the difference in density between chromite and ...

Groundwater contamination by heavy metals (HMs) released by weathering and mineral dissolution of granite, gneisses, ultramafic, and basaltic rock composition causes human health concerns worldwide. This paper evaluated the heavy metals (HMs) concentrations and physicochemical variables of groundwater around enriched chromite …

In this review, chromite originating from South Africa and processes used by the South African FeCr industry are mainly referred to as it is estimated that South Africa holds >70% of the global viable chromite ore reserves [9,10,14,15]. More so, in 2012, chromite originating from South Africa accounted for 41% of globally mined ore.

The gravity separation process is the main beneficiation process used to recover chromite mineral. However, these conventional chromite processing techniques become inefficient and complex when treating fine and ultrafine size particles (less than 75µm) leading to losses [1, 2]. Apart from that, separation of chromite from other associated ...

Table of Contents This report describes the elemental characterization of chromite and related materials at the Bureau of Mines, Albany Research Center. Analytical methods for determining the major constituents, representing extensive experience, refinement, and development, are described and fully annotated. This presentation …

Chromite is an oxide mineral belonging to the spinel group, a complex mineral containing magnesium, iron, aluminum, and Cr in varying proportions, depending on the deposit, that can be represented as FeCr 2 O 4 or (Fe 2+,Mg) [Cr,Al,Fe 3+] 2 O 4 ( Murthy et al., 2011; Sanchez-Segado et al., 2015 ).

The global demand for chromite, (Fe, Mg, Al)Cr 2 O 4, is driven by the need for ferrochrome to be used in wide applications for manufacturing different materials (Cramer et al. 2004).The chromite mining as well as the overall mining sector in South Africa has historically been a crucial factor in the economic growth and advancement of …

A review of chromite mining in Sukinda Valley of India: impact and potential remediation measures. ... The review highlights the pros and cons of various physical, chemical and biological techniques used worldwide for the treatment of chromium waste and also suggests better and reliable bioremediation measures.

Introduction. Chromite is a mineral that contains the element chromium. The major use for mined chromite is the production of fer-rochrome, an iron-chromium alloy used to make …

Chromite, a brownish black cubic mineral belonging to the spinel group, is the only ore mineral from which metallic chromium and chromium compounds are obtained. It has the chemical formula FeCr 2 O 4, and a theoretical composition of 32.0% FeO and 68.0% Cr 2 O 3. In its natural form it occurs in solid solution with other minerals in the spinel ...

Abstract – There are proven and well established widely accepted techniques for concentration of chromite ores such as spiral concentration, jigs and shaking tables. …

Stratiform, Podiform, and Beach Sands. Small amounts of chromite are found in many types of rock. However, chromite deposits that are large enough for mining are generally found in: 1) stratiform deposits (large masses of igneous rock such as norite or peridotite that slowly crystallized from subsurface magma); 2) podiform deposits (serpentines and …

Chromite mining dust and water spills containing poisonous hexavalent chromium produce the most unfavorable conditions in water bodies and soil, rendering them unsuitable for human and plant use.

Mining - Underground, Safety, Techniques: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining …

The bulk of chromite reserves are found in stratiform deposits (thin, even layers covering a broad area), but podiform deposits (scattered pod-shaped formations of varying size) are …

Rock samples from about 280 podiform chromite deposits in California and Oregon were analyzed for Pt, Pd, Rh, and Ir by fire assay-atomic absorption and spectrographic techniques to estimate by-product platinum-group element potential of chromite mining. These deposits include ophiolites from the Sierra Nevada, Klamath Mountains, Coast …

Chromium is mined from deposits of chromite ore, which is found in large, layered ultramafic intrusive rocks. Chromite ore is mined by both underground and surface methods, depending on the local geology of the deposit. Underground mining methods are used when the depth of the chromite deposit is too great for surface mining methods.

The main techniques used to characterize raw materials are currently bulk or 2D. This is a consequence of the current lack of standardized and automated methods to characterize particulate materials in 3D. Here, we apply a workflow to characterize a crushed chromite ore with nine particle size classes below 1 mm using X-ray computed …

The chromite mining areas lie within the premises of Tehsil Dargai, while Tehsil Batkhela is the control region for this study. Thus, 35 groundwater samples were collected from the Dargai mining region, 20 from the non-mining region (control area), and 5 from chromite mines water. ... we used PCA and MLR techniques simultaneously to …

Chromite Geology to Exploration – a review. January 2017. Conference: The 3rd International Conference on Modern Finding in Science and Technology. At: Qom. Authors: Aref Shirazi. Amirkabir ...