Chromite: The only mineral ore of chromium metal
The chromium consumed by United States industry comes from: A) other countries in the form of chromite ore, ferrochromium or chromium metal; or, B) chromium recovered from recycled metals. Over half of the chromium used in the United States today is from recycling.
Chromium Ore - an overview | ScienceDirect Topics
For example, chromites from certain ore deposits in Kazakhstan include chromium spinelides with a predominant content of (Mg, Fe)Cr 2 O 4, which contains some Al 3+ in octahedral sites. The structural formula of chromium spinelides might be expressed as (Mg 5.44 Fe 2.568)(Cr 12.64 Al 2.78 Fe 0.58)O 32.The composition ratios of chromium spinelides from different countries are shown in Table 8.2.
Chromium ore: Mineral information, data and …
An ore of the metal chromium, usually the principal ore mineral is chromite.
Chromium Ore - Cargo Handbook - the worlds …
Chromium ore is a natural mineral formation (lumpy, dark grey in colour) containing chromium in such compounds and concentrations as to make its commercial exploitation technically feasible and economically expedient.
Chromium: Mineral information, data and localities.
Large-volume platinum ore deposits in zonal mafic-ultramafic complexes of the Ural-Alaskan type and the outlook for their development. Geology of ore deposits, 53(5), 374. Geology of ore deposits…
Chromium - Wikipedia
Chromium is a stone element with the symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard and brittle transition metal. Chromium is the main additive in stainless steel, to which it adds anti-corrosive properties.
Chromium processing | Britannica
The recovery of chromium from the ore varies: in a good operation 90 percent is recovered in the molten metal; of the 10 percent remaining in the slag, some is in metallic form and can be recovered by mineral processing techniques.
USGS: Mineral Resources On-Line Spatial Data: …
Podiform chromite deposits--database and grade and tonnage models. Location and characteristics of 1,124 individual mineral deposits of this type, with grade and tonnage models for chromium as well as several related elements. Info: Preliminary map of chromite provinces in the conterminous United States
Chromite - Wikipedia
Chromite ore is found in underground conditions. Therefore, when exposed to aboveground conditions, various effects will occur. Some of these effects include weathering and oxidation. The element chromium is most abundant in chromite in the form of trivalent (Cr-III).
Podiform chromite deposits - USGS
Online Spatial Data; Podiform chromite deposits. Location and characteristics of 1,124 individual podiform chromite mineral deposits, with grade and tonnage models for chromium as well as several related elements.
Chromium | Minerals Education Coalition
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 ...
Podiform Chromite Deposits—Database and Grade and Tonnage ...
chromite deposits are found in dunite or peridotite near the contact of the cumulate and tectonite zones in ophiolites. We have identified 1,124 individual podiform chromite deposits, based on a 100-meter spatial rule, and have compiled them in a database. Of these, 619 deposits have been used to create three new grade and tonnage models for podiform chromite deposits. The major podiform ...
4 Countries with the World’s Highest Chromium …
South Africa produced 15 million MT of chromium in 2017, beating out the rest of the world’s chromium producers by a wide margin. Its chromium production was slightly higher than it was in 2016.
Chromite - an overview | ScienceDirect Topics
These deposits are mined primarily for their platinum, palladium, rhodium, nickel, and chromium contents. Magmatic ore deposits contain crystals of metallic oxides, immiscible sulfides, or oxide liquids that formed during the cooling and crystallization of magma.
Chrome Ore | Article about Chrome Ore by The …
Chrome Ore a natural mineral formation containing chromium in such compounds and concentrations as to make its commercial exploitation technically feasible and economically expedient. The only chromium-containing minerals that provide an industrial source of chromium are the chrome spinellids. In addition to chrome spinellids, the primary minerals of ...