Chromite is the only ore of chromium, a metal essential for making stainless steel, nichrome, chrome plating, pigments, refractories, chemicals and pharmaceuticals.
South African chromite occurs within the Bushveld Igneous Complex (BIC) and is considered as stratiform chromite [1]. The BIC holds three quarters of the world's viable chromite ore deposits [2], and has an aerial extent of 65000 km2 with thickness of about 7 to 8 km [3]. The BIC consist of western, eastern and the northern limbs.
It is shown that during the beneficiation of chromite ore, significant volumes of value-containing tailings (in the form of rejected chromite) are generated. Improving beneficiation circuits is complicated …
The environmental stability performance was analyzed through changes in edge length, mass loss, compressive strength development, and leaching concentration of Cr (vi).
Chromite is a dark grey, metallic, oxide mineral. Due to its metallic luster and occasional magnetic properties, chromite is often mistaken for magnetite. Chromite can often be found in basic igneous rocks, and in the metamorphic and sedimentary rocks created by rocks containing chromite that were affected by weather. A particularly useful metal, …
Chromite ore has a spinel structure with a general formula of (Fe,Mg)O. (Cr,Al,Fe)2 O 3. The content of Cr 2 O 3 for metallurgical-grade chromite ore is in the range 42–55% …
Article History. chromite. Related Topics: ore. chromite series. chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr 2 O 4) that is the chief commercial source of chromium.
Download Citation | Preparation of Oxidized Pellets with Chrome Ore | The microstructure and mechanical strength variations of chromite pellets preheated and roasted in air were studied ...
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 making stainless steel. Many of the strategic minerals are inputs into products in fast-changing markets. This article reviews the major process flow sheets in practice for the …
A decent-sized piece of rock containing the precious metal mountain chromite. The Eorzea Database Mountain Chromite Ore page.
The making of green pellet with suitable cold handling strength from a chromite ore is difficult. Also, the crushing of raw materials for pel- letization and the subsequent firing of the green pellets for strength development is an energy-intensive and complex process.
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 ...
In addition, previous research indicated that the strength of fired chromite ore pellets could be improved by adding magnetite [ 26 ]. Therefore, the chromium-nickel bearing iron ore pellets made from low-grade chromite concentrate, nickel laterite fines and magnetite concentrate was firstly proposed in this paper.
The reaction mechanism and phase transformation during the oxidation process of chromite spinel is further explained by thermodynamics calculation performed by FactSage software. Besides, routine laboratory preheating–roasting test of single ore pellets is also conducted to reveal the relevance of oxidizability to the consolidation of …
High-quality pellets have been developed from a low-grade Indian chromite overburden containing high silica in the present study. The thermodynamic, hot-stage microscopic, and thermogravimetric analyses of the overburden and pellet mixes predict the temperature of formation of low melting slag phases at various basicity. A temperature in …
Chromite ore processing residue (COPR) was used to replace the amount of BFS for the preparation of the geopolymer. Regarding the mechanical properties, the compressive strength of the geopolymer with 10–70% substitution of COPR meets the requirements for geological disposal and building materials.
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 …
A statistical evaluation of the cured (sintered) compressive strengths proved that pellets prepared from UG2 ore are likely to have the same, or better, compressive strength than pellets prepared ...
The making of green pellet with suitable cold handling strength from a chromite ore is difficult. Also, the crushing of raw materials for pelletization and the subsequent firing of the green pellets for strength development is an energy-intensive and complex process.
Ores are primary crafting materials necessary for game progress. They generally must be crafted into bars at a Furnace, after which they can craft several essential tools, weapons, armor, and other items. Some items require raw ores themselves, most commonly bricks and potions. Raw ores can also be used as plain blocks for construction. Ores are …
Article History. chromium. Related Topics: materials processing. chromium processing, preparation of the ore for use in various products. Chromium (Cr) is a brilliant, hard, …
Comparison of physical properties of oxidative sintered pellets produced with UG2 or metallurgical-grade South African chromite: A case study
The existence of leachable Cr(Ⅵ) in chromite ore processing residue (COPR) makes it hazardous waste. Therefore, resourceful utilization of COPR is nec…
Chromite ore processing residue (COPR) is a byproduct generated in producing chromium and chromium salts by high-temperature (approximately 1200 °C) roasting. COPR does great harm to the environment and human health due to its high content of hexavalent chromium, which has high mobility, mutagenicity, carcinogenicity, …
Chromite ore is the primary material to produce chromium compounds and chromium-containing products. In 2018, the global mine production of chromite ore was about 43 million metric tons, with more than 90% of those mined in five countries, Finland, India, Kazakhstan, South Africa, and Turkey.
To further enhance the growth and profitability of the South African chromite and FeCr industry, as well as other international producers mining/consuming lower-grade chromite, possible improvement of chromite ore by selectively removing Fe from chromite concentrates need to be investigated to increase the Cr/Fe ratio.
Chromite ore processing residue (COPR), a waste produced in high lime chromium salt production process using chromite, contains a fraction of leachable Cr (VI) which is harmful to humans and environment.
In this project, chromite tailings from Western Limb of the South African Bushveld Igneous Complex (BIC) was characterised with the objective of recovering fine and ultrafine chromite using wet magnetic separation process. 2. Materials and Methods. Chromite tailings ore sample was obtained from a MG chromite processing plant in the Western …
Request PDF | On Oct 1, 2023, E.L.J. Kleynhans and others published Chemical beneficiation of chromite ore to improve the chromium-to-iron ratio for ferrochrome production | Find, read and cite ...
In view of the above, the present study aims at producing low-cost sinter of chromite ore fines with adequate handling and high-temperature strengths.
In addition, previous research indicated that the strength of fired chromite ore pellets could be improved by adding magnetite [26]. Therefore, the chromium-nickel bearing iron ore pellets made from low-grade chromite concentrate, nickel laterite fines and magnetite concentrate was firstly proposed in this paper.
However, the briquettes of low-grade chromite are characterized by poor strength and thermostability as well as high production costs. In addition, the specific surface areas of low-grade chromite cannot meet the requirement of pelletizing process due to its comparatively coarse size distributions.
Mountain Chromite Ore. Stone. Item. Patch 7.0. Description: A decent-sized piece of rock containing the precious metal mountain chromite. Requirements:
The solidification of chromite ore processing residue is based on environmental protection and resource utilization, and effectively curing harmful elements, reducing negative effects, and developing a harmless and low-emission curing process are the main development directions at this stage.
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 Ore Processing Residue (COPR) produced in chromium salt production process causes a great health and environmental risk with Cr(VI) leaching.…
Even more remarkable are other thin bands of chromite in the Merensky Reef horizon that contains economic quantities of platinum. The ore mineral of late magmatic deposits is later than the rock silicates, reacts with them and forms into a bay, and these ore bodies yielded before the final consolidation of the igneous body.
Chromite is the only ore of chromium, making it especially important for mining and obtaining chromium. Geoscientists claim there are nearly "11 billion tons" of chromite in …
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.
