What is chromite (chrome) ore and where is it found
UG2 is a source of both platinum-group metals (PGMs) and chromite. Companies in South Africa supply chrome ore as UG2, Upper Group 2 reef, during the production of Platinum Group Metals (PGMs). UG2 tailings is the material left after the PGMs have been extracted from the UG2 ore through a floatation and concentration process.
Characterisation of South African Chromite Middle …
The mineralogical analysis in the ore showed that the occurrence of chromite phases in the ore is very similar in all Middle group seam layers as indicated in Figure 3. The six end-member compositions that combine to form chromite are hercynite (FeAl 2 O 4), spinel (MgAl 2 O 4), Fe-chromite (FeCr 2 O 4), magnesiochromite (MgCr 2 O 4), magnetite ...
Chromium Ore, Chromite, Properties, Uses, Distribution Map
Chromium Ore. Chromium is a critical alloying metal. It is used in the production of alloys with other metals such as nickel, cobalt, copper, and others, as well as in many other metallurgical, refractory, and chemical industries. Chromium increases the strength, hardness, and toughness of its alloys. Chromite (Cr) is the only commercially ...
Process for extraction of platinum group metals from chromite-bearing ore
A process for treating chromite-bearing ores to obtain useful mineral values, especially platinum group metal, therefrom wherein the ore is separated into magnetic and non-magnetic fractions; the non-magnetic fraction, containing a substantial portion of the platinum group metals, is concentrated and smelted to produce a metal layer containing …
An Overview of Currently Applied Ferrochrome …
>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 estimated ... The UG2 seam is primarily exploited as a source of platinum group metals (PGMs), and PGM circuits are designed to reject chromite to the tailings stream [25]. …
Chromium processing | Extraction, Uses & Applications
Chromium processing, preparation of the ore for use in various products. Chromium (Cr) is a brilliant, hard, refractory metal that melts at 1,857 °C (3,375 °F) and boils at 2,672 °C …
Chromite
Chromite ore can be separated in a high-strength field, despite the presence of iron impurities. The choice of method depends on several factors, primarily the type of the gangue. In some cases, separation and dressing methods are optimized to take into account other useful elements, such as PGM (platinum group metals) in South Africa, …
Chromite Ore
Chromium from ores of chromite is used to make essential stainless steel, tool steel, armor-piercing projectiles, and is used in other high-temperature applications. It is a …
Chromite
Chromite ore is mined in over 20 countries, but about 80% of production originates from four countries; ... The metal form of chromium, as it exists in this product, is of low toxicity. However, the chromite with hexavalent form is toxic. The adverse effects of the hexavalent form of chromite on the skin include ulcerations, dermatitis, and ...
Chromite: The mineral Chromite information and pictures
The Mineral chromite. Chromite, the principle ore of the element chromium, is a commercially valuable mineral. However, due to mining restrictions and the fact that Chromite is not commonly found in crystallized form, it is not well-represented in mineral collections. Chromite is isomorphous with the mineral Magnesiochromite and is easily ...
Chromite | Ores, Mining, Processing | Britannica
chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr 2 O 4) that is the chief commercial source of chromium.It is the principal member of the spinel series of chromium oxides; the other …
Chromite: Mineral information, data and localities.
Chromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite Series and the Chromite-Magnesiochromite Series.It is the iron analogue of Zincochromite, Cochromite, Manganochromite and …
Chromite
What is chromite or chrome ore and what are its uses? Chromite is a mineral used as the main source of chromium, a malleable metal; The largest chromite mines in the world South Africa has the largest chromite mines in the world; Chromite mineral deposits in West Asia in West Asia significant mineral resources and reserves of chromite exists; …
Chromium Statistics and Information | U.S. Geological Survey
Statistics and information on the worldwide supply of, demand for, and flow of the mineral commodity chromium. Chromium (Cr) has a wide range of uses in metals, chemicals, and refractories. It is one of the Nation's most important strategic and critical materials. Chromium use in iron, steel, and nonferrous alloys enhances hardenability and ...
Metal Profile: Chromium
Chromium metal is most widely recognized for its use in chromium plating (which is often referred to simply as 'chrome'), but its largest use is as an ingredient in …
Chromium
chromium metal, and stainless steel. Imported chromite ore was consumed by one chemical company to produce chromium chemicals. Stainless-steel and heat-resisting-steel producers were the leading consumers of ... Chromite ore (gross weight) 279 248 179 197 3 4 0 Ferrochromium (chromium content) 5 2,549 2,094 1,878 2, 837 6,800 Chromium …
Chrome ore beneficiation challenges & opportunities – A …
Sub-grade chromite ore with Cr 2 O 3 of about 38.5% of Sukinda region of India, can be upgraded to a marketable chrome concentrate of 53–54% Cr 2 O 3 with a recovery of about 58–60% and tailing loss of around 14–16.39% of Cr 2 O 3, by using wet shaking tables in the circuit (Banerjee et al., 2005). Based on the findings of experiments ...
Towards holistic technology solution to chromite ore
Overview of chromite ore processing. Chromite ore FeO·Cr 2 O 3 is a major ore for Chromium. India accounts for about 10% of world share of shipping grade Chromium ore reserves, having 45% Cr 2 O 3 content. South Africa and Zimbabwe and India are the Top five countries of Chrome ore processing industries in the Word (Indian Minerals …
Chromium Ore
The main component of the chromium ore is chromite FeCr 2 O 4. The ores extensively dispersed in natural deposits and generally contaminated with Mg, Si, Al, and O. The chromium metal commercially separated by oxidizing chromite ore to Cr 2 O 3, then the metal is attained by heating the Cr 2 O 3 in the presence of Al or Si [5,6].
Metal Profile: Chromium
Aluminothermic production of high purity chromium metal accounts for over 95% of chromium metal produced today. The first step in this process requires that the chromite ore is roasted with soda and lime in the air at 2000°F (1000°C), which creates a sodium chromate containing calcine.It can be leached away from the waste material and …
Smelting Process of Chromite Ore Fines to Produce Crude …
The smelting behavior of waste chromite ore fines containing Cr and Ni to produce crude Fe–Cr–Ni–N alloy was investigated in this study. In the experiments, for each heat, liquid steel melt (metal pool 1 kg) was prepared in a 3--capacity laboratory-scale electric arc furnace for the absorption of reduced metals like chromium, nickel, etc., …
Characterizing and recovering the platinum group …
Various methods (such as the mineralogical data, chromite content, grade of PGEs, and sulphur content, etc.) are used to classify PGEs ores. A combination of PGEs content and mode of geological occurrence to classify ore types has been adopted from the classification presented in CIM Special Volume 23: Platinum Group …
CHROMITE Indian Minerals Yearbook 2020
6 Chromite. Chromite is the single commercially viable ore of chromium (Cr) which is chemically known as iron chromium oxide (FeCr2O 4). The properties of chromium that make it most versatile and indispensable are its resistance to corrosion, oxidation, wear & galling and enhancement of hardenability. Chromium is an important alloying metal in ...
Chromite | Earth Sciences Museum
Chromite is the main source of the metal chromium, a metal used to induce hardness, toughness and chemical resistance in steel. It was named after its chemical composition, …
Mineral Commodity Summaries 2024
1Secondary production is based on reported receipts of all types of stainless-steel scrap. 2Includes chromium chemicals, chromium metal, chromite ores, ferrochromium, ferrosilicon chromium, and stainless-steel products and scrap. 3Defined as change in total inventory from prior yearend inventory. Beginning in 2023, Government stock changes …
Chromium (Cr) Toxicity: What Is Chromium? | Environmental …
The most important stable states are 0 (elemental metal), +3 (trivalent), and +6 (hexavalent). Chromium in chromite ore is in the trivalent state; industrial processes also produce the elemental metal and hexavalent chromium. The health effects of chromium are primarily related to the valence state of the metal at the time of exposure.
Copper, Nickel & Chromite Distribution in India – UPSC
India has low grade copper ore (less than 1% metal content) (international average 2.5%). The major part of supply comes from the USA, Canada, Zimbabwe, Japan, ... (99 percent) of chromite ore. Over 85 percent of the ore is of high grade [Keonjhar, Cuttack, and Dhenkanal]. Chromite in Other States. Karnataka is the second-largest …
Valorization From Waste: Combined Reduction of Chromite Ore …
A similar study on the effect of basicity on metal recovery from the low-grade chromite ore by Relander and Honkaniemi and Nurjaman et al. showed that a basicity of 0.56 and between 0.4 and 0.6 was considered optimum for the maximum metal recovery. Under the condition of maximum recovery, the holding time was varied to study its effect …
Chromium
Chromium. Chromium (Cr) is a hard, bluish metallic element. The only ore of chromium is the mineral chromite and 99 percent of the world's chromite is found in southern Africa and Zimbabwe. Geologists estimate that there are about 11 billion tons of mineable chromite ore in the world, enough to supply the current demand for hundreds of years.
Mineralogical Analysis of a Chrome Ore from South Africa
1. The compositions of the South African chrome ore are relatively simple, chromite is the main mineral, and accounts for more than 91%; chlorite and forsterite are the main gangue minerals. The main elements in the pyrite are Mg, Al, Si, O and a small amount of Fe; the main elements in the forsterite are Mg, Si and O; 2.
