Chrome Ore Chrome To Iron Ratio

Although South Africa holds three quarters of the world's chromite ore reserves, the chrome-to-iron (Cr-to-Fe) ratio of the local chromite ores is relatively low (1.47 to 1.55), compared to other deposits in the world (2.6 to 3.5). Additionally, iron is more readily reduced than chromium.

Thesis (M.Sc. (Chemistry))--North-West University, Potchefstroom Campus, 2010.

1/3/2012· gangue minerals whereas product quality can be upgraded maximum to 3.58 of Cr:Fe ratio by separating all iron bearing minerals. The beneficiation studies revealed that, the product can be enriched to having Cr:Fe ratio of 2.31 and 3.35 by

When chromite ore is mined, it is aimed for the production of ferrochrome and produces a chromite concentrate of a high chromium to iron ratio. It can also be crushed and processed. Chromite concentrate, when combined with a reductant such as coal or coke and a high temperature furnace can produce ferrochrome.

1/3/2012· Inverse relationship between chromite and iron in different sizes support the presence of iron in the form of different iron bearing minerals which showed that about 70% (by weight) of the sample was chromite particles whereas about 20% of the total mass was iron bearing minerals such as goethite 7%, hematite 3%, kaolinite 2% and iron bearing silicates (olivine, pigeonite, etc.) of 11%.

The Cr/Fe ratio can thus be used as a proxy for the quality of chromite ore [22]. The lower grade deposits, with low Cr/Fe ratios (i.e., high iron content and low Cr 2 O 3 content) were as a

Ferrochrome, or ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy of chromium and iron, generally containing 50 to 70% chromium by weight. Ferrochrome is produced by electric arc carbothermic reduction of chromite.

all selected chrome ores, particularly CaO with a range of only 1-2%. The major changes of the chrome ores appear in the contents of SiO 2, Cr 2 O 3 and FeO. The content of SiO 2 % increases from 4% of Steelpoort ore to 19% of Tweefontein ore, and the contents of Cr 2 O 3 %, FeO% decreases from 43 to content of Cr 2 O 3

The chromium content of the alloy is a function of the chromium (Cr) and iron (Fe) contents of the ore, with the chromium to iron ratio being a key parameter; the higher the Cr/Fe ratio in the ore, the higher the Cr content in the resultant alloy. 3.

> 2.1 Cr/Fe ratio High chrome content Chemical Grade 40-46% Cr2O3 < 2.1 Cr/Fe ratio High iron content Refractory Grade > 20% Al2O3 > 60% (Al2O3 + Cr2O3) High aluminium content A schedule of chrome ore reserves was published in the early 1980s to show the distribution by quality and quantity. Table II shows the world reserves of chrome ore

These substitutions are at the origin of different types of chromites distinguished, among other things, by their chrome to iron ratios. In the geological environment, the chrome to iron ratios of chromites vary from 1.3 to 4.0 in many stratiform or podiform deposits. Chromites possessing chrome to Iron ratios higher than 3, are rare in nature.

Thesis (M.Sc. (Chemistry))--North-West University, Potchefstroom Campus, 2010.

Chromite is a crystalline mineral composed primarily of iron(II) oxide and chromium(III) oxide compounds. It can be represented by the chemical formula of FeCr 2 O 4.It is an oxide mineral belonging to the spinel group.The element magnesium can substitute for iron in variable amounts as it forms a solid solution with magnesiochromite (MgCr 2 O 4). A substitution of the element aluminium can

Ferrochrome, or ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy of chromium and iron, generally containing 50 to 70% chromium by weight. Ferrochrome is produced by electric arc carbothermic reduction of chromite.

The chromium content of the alloy is a function of the chromium (Cr) and iron (Fe) contents of the ore, with the chromium to iron ratio being a key parameter; the higher the Cr/Fe ratio in the ore, the higher the Cr content in the resultant alloy. 3.

all selected chrome ores, particularly CaO with a range of only 1-2%. The major changes of the chrome ores appear in the contents of SiO 2, Cr 2 O 3 and FeO. The content of SiO 2 % increases from 4% of Steelpoort ore to 19% of Tweefontein ore, and the contents of Cr 2 O 3 %, FeO% decreases from 43 to content of Cr 2 O 3

Chemical Properties. Typical Chemistry: Cr2O3= 46-47%, FeO= 24.50%, Al2O3= 15.0%, MgO= 9.50%, and SiO2= 0.7- 1.0%.

Chrome Ore: Indian Concentrate Specifications Metallurgical Grade Refractory Grade -1 Refractory Grade -2 SPECIFICATION Physical & Chemical Properties: CR2O3 : 50/48% (BASIS/MIN) CR: FE : 2.45: 1 MIN SIO2 : 6.0% MAX AL2O3 : 14% MAX MGO : 14% MAX P : 0.007% MAX S : 0.007 % MAX SIZE : 0 3 MM (90% MIN) MOISTURE : 7% MAX

the earth’s mantle, it is referred to as chrome ore. Chrome ore is crushed, screened, jigged into chrome concentrate and then smelted into ferrochrome. Ferrochrome, with nickel, is then processed into stainless steel. The processing of chromite is depicted in Figure 1. As chrome ore

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