Mineral

The steel industry cannot be conceived without the use of lime, ever-present during the whole steel-making process. The addition of lime is necessary in electric arc furnaces, AOD converters, in refining ladles and so on. Lime in steel-making can be a purifier to eliminate impurities, remove sulphur, remove phosphorus -dephosphorization- and it can act as a flux, neutralizer and so on with a specific goal, that of transforming iron ore into steel and other ferrous products. A transformation which needs other products that are also available from Calcinor, such as calcined dolomite and refractories.

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SiO2 plays an important role in the production of hot metal (liquid iron) and liquid steel during primary steelmaking. Silica content of slag during production of hot metal is in the range of 29 % to 38 % while it is in the range of 12 % to 19 % in the steelmaking slag.

Silica has many uses. Uses connected with steel industry include the following:

Moulds and cores used to make metal castings

Refractory bricks and ramming masses used in steel plants, foundries, and cement plants

Filter media for water filtration systems

Sandblasting abrasives

Building materials such as concrete, grout and plaster

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Plaster is a building material used for the protective or decorative coating of walls and ceilings and for molding and casting decorative elements. In English "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. Another imprecise term used for the material is stucco, which is also often used for plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces.

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Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which is a type of sedimentary rock consisting mainly of calcite) and is the main component of pearls and the shells of marine organisms, snails, and eggs. The main use of calcium carbonate is in the construction industry, either as a building material, or limestone aggregate for road building, as an ingredient of cement, or as the starting material for the preparation of builders' lime by burning in a kiln.

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