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.

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 …

The chromite used in this study was sourced from the UG2 deposit of the Samancor Mine in South Africa. The chromite ore was subjected to grinding and sieving processes, resulting in particle sizes ranging from 74 to 150 μm. Subsequently, the ore was dried in a drying cabinet at a temperature of 200 °C for 24 h to eliminate any moisture …

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 …

The effluents and solid wastes from the mining, chrome-plating, leather-tanning, and dye-manufacturing industries are high in chromium concentration and …

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 …

Overall, the mining and processing of chromium ore require specialized techniques and processes to extract and concentrate chromite, followed by smelting and refining to produce ferrochrome, …

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 …

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 ...

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 …

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 …

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 a brownish-black or deep green mineral that belongs to the spinel group of minerals. Its chemical formula is FeCr2 O4 . Chromite is the primary ore from which chromium is extracted. When it comes to its significance, chromite is the sole ore of chromium, a metal used to induce hardness, toughness, and chemical resistance in steel.

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 ...

Most environmental concerns associated with the mining and processing of chromite ore focus on the solubility of chromium and its oxidation state. Although trivalent chromium (Cr 3+) is an essential micronutrient for humans, hexavalent chromium (Cr 6+) is highly toxic. Chromium-bearing solid phases that occur in the chromite ore-processing ...

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 …

According to statistics [10], global chromite mining consists of 20% lumpy chromite and 80% powdery chromite, resulting in an insufficient supply of lumpy chromite. ... Traditional methods employed for chromite pre-treatment predominantly revolve around oxidative sintering techniques, including traditional sintering and Outotec technologies ...

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.

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 …

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 ...

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 ...

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. It is …

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 ...

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 …

The average monthly production of chromite ore of the Muslim Bagh area is 48.63 tons while the maximum production was reported up to 600 tons, and, the minimum monthly production was less …

Spiral is widely used to concentrate beach sands, iron, gold, sulfide minerals, chromite, as well as in the coal washing industry [2, 4]. Spirals have long been used to concentrate chromite deposits due to their relatively low operating costs (compared with other processing methods) and the simplicity of the separation process.

Chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr2O4) that is the chief commercial source of …

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.

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

A residual gravity anomaly map over a chromite deposit, ... All the EM techniques work on the same principle but use different operating frequencies to provide a range of depth penetration and resolution. Normally, low frequencies are used for investigating subsurface ground conditions, intermediate frequencies for locating discrete …

The mining efforts for chromite in Oman are in progress but not on scientific grounds. On a site called Izki (670 m asl) the chromite was expected on the top of a hill in a small area (150x50 m ...

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 ...

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