Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4).
Chemical Classification
Oxide
Chemical Composition
FeCr2O4 with magnesium substituting for iron in significant amounts
Crystal System
Isometric
Uses
An ore of chromium
Properties of Chrome Ore:
Chrome ore, primarily consisting of chromite (FeCrO), is rich in iron, chromium, and oxygen. is a mineral that serves as the main source of chromium. Chromium is a critical element used in various industries.
Appearance: It usually appears as dark gray to black with a metallic luster.
Hardness: It's relatively hard, with a Mohs hardness of 5.5.
Density: High density, which makes it useful in heavy-duty industrial applications.
Mining and Production:
Mining Process:
Open-pit Mining: Suitable for deposits near the surface.
Underground Mining: Used for deeper deposits.
Ore Processing: Chrome ore is processed into ferrochrome (an alloy of chromium and iron) through smelting in an electric arc furnace. This is a crucial material in stainless steel production.
Applications:
1.Stainless Steel: Chromium gives stainless steel its corrosion-resistant properties. Nearly 80% of the world's chromium is used in this sector.
2.Refractories: Chrome ore is used to manufacture heat-resistant bricks and lining for furnaces.
3.Chemical Industry: Used to produce chromium chemicals for pigments, tanning leather, and anodizing aluminum.
4.Foundry Sand: Processed chrome ore is used in mold-making during metal casting.
Zinc ore is most commonly found as zinc carbonate (ZnCO3), known as calamine or smithsonite. It generally occurs as rounded, crystalline crusts or granular, honeycombed masses that have a vitreous or pearly luster and are typically dirty brown or grey in colour.
Nigeria is richly blessed with large deposits of Zinc ore in Ebonyi and Benue state. We can export top quality of this product in 1000-1500MT every month.
Zinc ore is most commonly found as zinc carbonate (ZnCO3), known as calamine or smithsonite. It generally occurs as rounded, crystalline crusts or granular, honeycombed masses that have a vitreous or pearly luster and are typically dirty brown or grey in colour.
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity (electrowinning).
The zinc content of mined ore is usually between 3 and 10 percent. Almost all ores contain the lead sulfide mineral galena and small quantities of cadmium sulfide.. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral.Specifications Size 1-50 Mm, 100-200 Mm, 200-300 Mm, 50-100 Mm Material Raw Zinc Shape Lump Oil Absobtion 5-7% Silver 0.01% Density 5.6 Lead zinc content 38%-45% Sieving rate: 98% Zn 48.00% min. As 0.02% Max.
