Chrome Sand | Refractory Application | African Pegmatite

Filler sand made primarily with chrome ore is called chromite-based sand. Its advantages include good fluidity, high density, high melting point, and resistance to over-sintering. At high temperatures, the FeO component of chrome sand forms a secondary spinel that changes the volume of the sintered layer. This can cause cracking when the slide ...

Exploration for strategic placer mineral deposits in a …

Beach and dune sands are ubiquitous along the 1–1.5 km-wide NNE-trending coast. Forty-three representative samples were collected from selected boreholes sampled by auger and dormer drilling at depths ranging from 6.0 m to 12.0 m. ... These utilities have prompted beach sand exploration and exploitation in India. ... Placer chromite along ...

Chromitite layers indicate the existence of large, long …

Chromitite layers indicate the existence of large, long-lived, and entirely molten magma chambers. Rais Latypov, Sofya Chistyakova, Stephen J. Barnes, Belinda …

Application of Satellite Remote Sensing, UAV

This research combines several remote sensing methods to discriminate the highly serpentinized peridotites hosting chromite pods from the other barren ultramafic and mafic cumulates in the area of the Sabzevar Ophiolite, which hosts several known chromite and other mineral deposits. The irregular and sporadic occurrence of chromite pods in …

Chromite Sand Testing

Typical foundry grade chromite sands will show a weight gain of 0.5 to 1.0 in a standard LOI test. • To avoid oxidation reactions, chromite sands can be heated under an inert atmosphere such as nitrogen. Under these conditions a high quality foundry chromite sand will experience a minimal weight loss of 0 to 0.2%

Value of mineral deposits associated with mafic and …

Despite historically limited investment into chromite exploration worldwide, ... As the quality and availability of large tonnage but lower grade heavy mineral sand deposits dwindles, bedrock ilmenite deposits having purity and appropriate textures (i.e., coarse-grained and easily liberated ilmenite as opposed to lamellar ilmenite in magnetite ...

Mineral Exploration Scenario in India: Prospect, Promise and …

The Reserve to Resource ratio which, as per mineral exploration practice, should be over 50% is woefully low for most of the minerals. For instance it is 17% for bauxite, 14% for copper, 24% for iron 14% for lead-Zinc, 8% for limestone and 30% for chromite etc. This calls for highly focused exploration strategy at high confidence level.

CHROMITE Indian Minerals Yearbook 2020

of chromite accounted for 52% & above Cr 2 O 3 Fines grade followed by 30% least of 40 –52% Cr 2 O 3 (lumps 2% & fines 28%) grade. Mine-head closing stocks of chromite in …

(PDF) Podiform chromite exploration using audio magnetotelluric at

To explore for and evaluate concealed and potential chromite deposits within the Luobusa ophiolite, we conducted a comprehensive exploration project financed by mining companies between 2012 and 2013.

Chromite resources of the podiform chromite deposits and exploration …

Exploration models for podiform chromite in the Medford-Coos Bay quadrangles must consider the facts that (1) one deposit occurs for every 5 km 2 of ultramafic outcrop; similarly for a 5 km 3 volume, and (2) the average deposit has a tonnage of 206 tonnes, a volume of 8.9 m 3 and a grade between 43 and 51 percent Cr2O3.

(PDF) Optimisation of a resin-coated chromite sand for rapid sand …

The chromite sand was coated per weight of sand ranging from 0 .1 to 0.2, 0 .3, 0.4, and 0. 5% sulphonic acid. catalyst, using batch mixing equipment. The reason for this range of percentages was ...

Chromite

The steady growth in global chromite ore sand concentrates production resulted from a rise in demand from the ferrochrome and ... Exploration General Directorate (MTA); Chromite deposits in Turkey. ... (46.46% Cr), 32.0% FeO, (24.95% Fe), and 28.59% total oxygen. Chromite is the primary source of chromium, and applications in hard rustles …

Chromite: The only mineral ore of chromium metal

Chromite is found in beach sands derived from the weathering of chromite-bearing rocks and laterite soils that developed over peridotite. Beach sand rich in chromite and other …

A General Perspective on Geophysical Methods in Mineral Exploration

Geophysical methods are known to play an indispensable role in mineral exploration. Over the years, they have undergone a phenomenal improvement in the design and development of equipment, methods and precision of data acquisition, processing and interpretation. Every geophysical method is directly or implicitly related to …

What is foundry sand and how is it used in foundry …

Foundry grade chromite sand is a complex compound of various elements; chromium (Cr 2 O 3 ), aluminium (Al 2 O 3 ), silica (SiO 2 ), and magnesium oxide (MgO). Chrome's resilient characteristics make it the material of choice for many foundry applications. It is also used in molds for automotive castings and as a well filler in steel production.

Foundry Chromite Sand AFS40-45/AFS45-55

Foundry Chromite Sand is a natural spinel dominated by chromite sand from South Africa. It is a high-performance casting sand for foundies. After crushing, grinding, and sieving in our factory in China, it is divided into prescribed grain sizes and suitable for foundry. The grain size range is controlled by the AFS fineness standard. With high Cr2O3 (≥46.0%) …

Formation of podiform chromitite deposits: implications from …

As the modal chromite content of these rocks is about 85%, this means that the matrix must have been highly enriched in PGE relative to the chromite. For example, if the whole rock chondrite-normalized Pd content before alteration was 0.1, and after alteration was 0.01, and we assume that all of the remaining Pd is in the chromite, then …

Metalcasting

Hevi-Sand®. Hevi-Sand® Chromite Sand is a versatile, unique aggregate, unlike ordinary chromite sands. Hevi-Sand is the only chromite brand that offers your business full life-cycle support. Combined with worldwide logistics and a global technical support team, these components work together to provide the highest-quality finished castings ...

Occurrence and mineral chemistry of chromite and related

The Hongshishan mafic-ultramafic complex is located in the western Beishan Terrane, NW China, and hosts an economic Ni-Cu deposit. Chromite as accessory mineral from the complex is divided into three types based on its occurrence and morphology. Quantitative electron probe microanalysis (EPMA) have been conducted on the different …

SEC.gov

The chromite sands have an average density of 1.96 tonnes/m 3 equivalent to a total 148.1 million tonnes of chromite bearing sediment. This report also reported additional inferred resources at the Mouea project area of 47.3 million tonnes of chromite bearing sediment containing 1.53 million tonnes of chromium oxide.

Chapter 46 Diamonds and Associated Heavy Minerals in …

As mentioned previously, the most important indicator minerals for kimberlite exploration are garnet, chromite, ilmenite, Cr-diopside and olivine (Fig. 3). Cr-diopside and olivine break down rapidly in most surface environments and, other than in frigid arctic or sub-arctic conditions, are generally not transported significant distances from ...

Chromite chemistry of a massive chromitite seam in the

The Bushveld Igneous Complex (BIC) is known for its laterally extensive platinum group element–bearing layers, the most famous being the Merensky Reef and the UG-2 chromitite in the eastern and western limbs of the complex. In the northern limb, the Platreef mineralization and a thick chromitite seam below it (referred to as the "UG-2 …

Structural analysis and susceptibility inversion based on …

Rezayee, M.H., Khalaj, M. & Mizunaga, H. Structural analysis and susceptibility inversion based on ground magnetic data to map the chromite mineral …

What Is Chromite | HAIXU

What is Chromite? Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). It is dark gray to black in color with a metallic to submetallic luster and 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 …

Chromite Sand Application Examples In Casting Production

Chromite sand belongs to the category of special sand in modeling materials. Its main mineral composition is FeO.Cr2O3, density is 4.0~4.8g/cm3, Mohs hardness is 5.5~6, refractoriness is greater than 1900℃, chromite Sand has good resistance to alkaline slag and does not react chemically with iron oxide.

CHROMITE-BEARING SANDS OF THE SOUTHERN …

Index map of Oregon, showing location of chromiferous sand deposits and areas included in plates 41, 42, and 43. The mountains rise either from the back of the coastal plain or …

GOVERNMENT OF INDIA

5.7.5 Exploration Methodology 5.8 Geochemical Exploration for Chromite 5.9 Recent Exploration for Chromite 5.9.1 GSI 5.9.2 MECL 5.9.3 Exploration by Lessees: Fig 5. 2 5.10 GSI - Strategy for Chromite Exploration in Twelfth Five Year Plan 5.11 References MINING 6.0 Introduction 6.1 Mines in Odisha State 6.1.1 Sukinda Chromite Mine of Tata …

CHROMITE-BEARING SANDS OF THE SOUTHERN …

CHROMITE-BEARING SANDS, SOUTH COAST OP OREGON 115 much as 3 miles in length which are impassable during the wet season. A branch line of the Southern Pacific Railroad serves ... writer could learn no other exploration of the deposits for these minerals had been carried out prior to 1940. In February 1940, Earl K. Nixon, Director of the …

What is chromite | SICHENG

Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and …

(PDF) Chromite Geology to Exploration – a review

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 ...