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Ferromanganese. Ferromanganese metal, note mirror-like sheen responsible for German name spiegel. Ferromanganese is an alloy of iron and manganese, with other elements such as silicon, carbon, sulfur, nitrogen and phosphorus. [1] The primary use of ferromanganese is as a type of processed manganese source to add to different types of steel ...
Ferroalloy. Ferroalloy refers to various alloys of iron with a high proportion of one or more other elements such as manganese (Mn), aluminium (Al), or silicon (Si). [1] They are used in the production of steels and alloys. [2][3] The alloys impart distinctive qualities to steel and cast iron or serve important functions during production and ...
Spiegeleisen. Spiegeleisen (literally "mirror-iron", German: Spiegel — mirror or specular; Eisen — iron) is a ferromanganese alloy containing approximately 15% manganese and small quantities of carbon and silicon. Spiegeleisen is sometimes also referred to as specular pig iron, Spiegel iron, just Spiegel, or Bisalloy.
Ferrosilicon is used as a source of silicon to reduce metals from their oxides and to deoxidize steel and other ferrous alloys. This prevents the loss of carbon from the molten steel (so called blocking the heat); ferromanganese, spiegeleisen, calcium silicides, and many other materials are used for the same purpose. [5]
World War I Brodie helmet, made from Hadfield steel. Mangalloy, also called manganese steel or Hadfield steel, is an alloy steel containing an average of around 13% manganese. Mangalloy is known for its high impact strength and resistance to abrasion once in its work-hardened state.
The Ferro Alloys produced are High Carbon Ferro Chrome, Low Carbon Ferro Chrome, Silicochrome, Silicomanganese, and Magnesium Ferrosilicon, Ferromanganese etc., These alloys are tapped from electric arc furnaces in the molten state. They are prepared to the required size from 25 mm to 150 mm and transported to the various steel companies.
Depending on their composition and autorial choice, they may also be called ferromanganese nodules. Ferromanganese nodules are mineral concretions composed of silicates and insoluble iron and manganese oxides that form on the ocean seafloor and terrestrial soils .
The resulting ferromanganese has a manganese content of 30 to 80%. [74] Pure manganese used for the production of iron-free alloys is produced by leaching manganese ore with sulfuric acid and a subsequent electrowinning process. [81] Process flow diagram for a manganese refining circuit.
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