Chromite Mineralogy And Processing

Chrome ore beneficiation challenges & …

Gu, F., Wills, B.A., 1988. Chromite–mineralogy and processing. Minerals Engineering. 1 (3), 235–240. ... Due to the ultrafine particle size required for effective processing of chromite ores ...

Characterisation of South African Chromite Middle …

Keywords: Chromite, Middle Group seam, Mineralogy, Processing, Grinding, Comminution 1. Introduction Chromite is a very important mineral because it is the only economical viable source of chromium. South African chromite occurs within the Bushveld Igneous Complex (BIC) and is considered as stratiform chromite [1]. The BIC holds

Mineralogical characterisation of chromite in the UG2 Reef …

During the beneficiation of chromite hosted PGE's by froth flotation, chromite represents the principal gangue mineral. This is particularly true for the UG2 main seam. An excess of more than 3% in mass of chromite in the PGM concentrate is known to result in significant problems in the downstream processing and extraction of PGEs.

Case Study: Chromite mining and processing

Case Study: Chromite mining and health concerns 5 Chromium mining and processing In nature, chromium is found as chromite ore, composed of elemental iron, oxygen and chromium (FeOCr 2 O 3). 1,2 heavily in about a 700 m vicinity around the Countries with commercially significant chromite mines include Russia, South Africa, Zimbabwe, Turkey, the

Integrated feed management of mineral processing plants …

ABSTRACT. The control of chromite feeds is supported by alternating modes of operation that respond to imbalances in feed stockpiles. Conventional classifications of chromite relate to its end uses: metallurgical (with high Cr 2 O 3 content and Cr:Fe ratio close to 3, to produce ferrochrome), chemical and refractory. However, natural chromite is represented broadly as …

Chromite- mineralogy and processing | Semantic Scholar

Chromite is an important mineral used in the metallurgy, chemistry, and refractory industries. For this reason, beneficiation of chromite tailings is very important.

Distribution characteristics of minerals and elements in chromite …

In this paper, environmental scanning electron microscopy (ESEM) is applied to characterizing the mineral and element distribution of chromite ore processing residue (COPR). The test results show that Cr-bearing brownmillerite occurs in the rim of COPR particle, while hydroandradite with Cr(VI) in its structure presents inside the COPR particle. Periclase and …

(PDF) Grindability and Magnetic Property of Chromites

[Show full abstract] chromite-water system, i.e.p.(isoelectric point) of pure chromite which has fresh surface is around pH 8.0 regardless of the chemical composition. (2) There are considerable ...

Chromite: The only mineral ore of chromium …

Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4 ). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the …

Mineralogical Analysis of a Chrome Ore from South Africa

Latest researches of chrome ore are usually focused on the formation of chromite and other gangue minerals in the geology of mining areas [8, 9], the pretreatment such as mineral processing and agglomeration, researches about process mineralogy of chrome ore are rarely reported. So, to produce high grade chromium alloy, the mineralogical ...

Chromite in komatiites: 3D morphologies with implications …

High-resolution X-ray computed tomography. Cores were drilled out of the samples (Table 2) with core diameter optimized to obtain pixel size suitable to image precisely chromite morphology in the different types of samples.Each core was scanned using a Skyscan 1,172 desktop high-resolution scanner at CSIRO Process Science and Engineering (Perth, Australia).

(PDF) minerals A Process Mineralogical Evaluation of Chromite at …

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.

Mineralogy and pre-concentration of the chromite …

Physical, mineralogical and geochemical characterization, along with some beneficiation approach to pre-concentrate the Ni content of the chromite overburden material of the Sukinda Valley India, have been carried our in derail. Mineralogically, the overburden consists of geothite, quartz, hematite, magnetite and secondary silicates in varying proportions. A specific Ni …

Preconcentration strategies in the processing of nickel …

Additional information relating the ore mineralogy to processing Ni laterites under heap leaching conditions has been published by Watling et al. (2011). The column leaching behaviour of one of the Western Australian Ni laterites after agglomeration has been reported by Xu et al., ... Characterisation of the mineralogy of the chromite overburden.

The Geological Occurrence, Mineralogy, and Processing …

Russia and South Africa are the world's leading producers of platinum group elements (PGEs). This places them in a unique position regarding the supply of these two key industrial commodities. The purpose of this paper is to provide a comparative high-level overview of aspects of the geological occurrence, mineralogy, and processing by flotation of the …

The valorisation of platinum group metals from flotation …

Other factors also include the complex mineralogy emanating from UG2 and Platreef ore types and inconsistent PGM recoveries – due to the inherent complex mineralogy of ore fed to concentrators (Corin et al., 2021). The UG2 reef contains about 40 – 70% chromite which renders processing complexities in the concentration circuits.

Mineral processing: leaching process of chromium and …

It is well known, chromite mineral is a solid solution of four different spinels form a combination of the following potential end members: FeAl 2 O 4, MgAl 2 O 4, FeCr 2 O 4, …

Chromite ore beneficiation: prospects and challenges

Considering the tailing disposal problems of chromite gravity concentration plants, the research works of Amer and lbrahim (1996) on hydrometallurgical processing of low-grade chromite ore (Barramiya, Egypt), using mechanical alkaline treatment in an attritor followed by oxidative leaching in an autoclave reveals that single-stage leaching at ...

Importance of Mineralogy in the Geoenvironmental …

The geoenvironmental characterization of COPR at two deposition sites (New Jersey and Maryland) included geotechnical, chemical, mineralogical, and leaching analyses of three main chromite ore processing residue (COPR) …

Geometallurgical characterisation of Merensky Reef and …

1. Introduction. The Bushveld Complex in South Africa is the world's largest reserve of the PGE (Cawthorn, 1999).Two ore horizons are mined in the southern sector, the Merensky Reef and the UG2 (Schouwstra et al., 2000, Scoon, 2009).These differ drastically in their mineralogy, with the Merensky Reef dominated by plagioclase and orthopyroxene, and the …

Mineralogical Analysis of a Chrome Ore from South …

of chromite and other gangue minerals in the geology of mining areas [8, 9], the pretreatment such as mineral processing [10] and agglomeration [11], researches about process mineralogy of chrome ore are rarely reported. So, to produce high grade chromium alloy, the mineralogical studies, including the chemical compo-

Chromite: The only mineral ore of chromium metal

What is Chromite? Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4).It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or weathering.

Chrome ore beneficiation challenges

In: Proceedings of Column Flotation Symposium. Sudbury, Canada, pp. 211–219. Guney, A., et al., 1992. Concentration of chromite gravity tailings by free jet type and column flotation system. In: Proceedings of the First International …

Detoxification and immobilization of chromite ore processing …

Introduction. Chromite ore processing residue (COPR) is a waste produced in high lime chromium salt production process using chromite ((Mg, Fe)(Cr, Al) 2 O 4).It contains up to 2% of mobile, toxic and carcinogenic Cr(VI) [1].It is reported that 2–3 tons COPR is generated in the production of 1 ton sodium dichromate by the high lime process [2].The high …

Chemical beneficiation of chromite ore to improve the …

Raw materials were obtained from a large South African FeCr producer operating on the pre-reduced pelletized chromite process (Beukes et al., 2010, Kleynhans et al., 2012, Kleynhans et al., 2016) at two of their smelters.The sample materials, utilized on an industrial scale, consist of metallurgical grade chromite ore (<1 mm), bentonite clay (binder), and …

Chromite- mineralogy and processing

Chromite is an important strategic mineral. In this paper, its deposition, mineralogical properties, and beneficiation are briefly reviewed. ... Chromite- mineralogy and processing Gu, F.; Wills, …

Chrome ore beneficiation challenges & opportunities – A …

Abstract. Supply of world chromite (chrome ore) has come under severe pressure over the past year driven by strong demand for ferrochrome used in ferroalloy production for …

Importance of Mineralogy in the Geoenvironmental Characterization …

The geoenvironmental characterization of COPR at two deposition sites (New Jersey and Maryland) included geotechnical, chemical, mineralogical, and leaching analyses of three main chromite ore ...

Mineralogy and pre-concentration of the chromite …

Request PDF | Mineralogy and pre-concentration of the chromite overburden of the Sukinda Ultramafic Belt, Orissa, India | Physical, mineralogical and geochemical characterization, along with some ...

Relationship between process mineralogical characterization …

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 metamorphic …