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  • What is the use of limestone of in the extraction of iron

    9/1/2017· Limestone is used in iron extraction to remove impurities from the iron and becomes molten slag. The calcium carbonate (CaO3) in limestone catabolically reacts, forming calcium oxide(CaO) and carbon dioxide(CO2). CaO is highly reactive when subjec...

  • Limestone Its Processing and Application in Iron and

    7/7/2017· These kilns usually use limestone sizes ranging from 130 mm to 200 mm. In these types of kiln, the temperature rise must be slow and therefore the resultant residence time is long. Vertical kilns are fuel-efficient, but limited in capacity. In case of horizontal kilns, the kiln body rotates, allowing the limestone to tumble and exposing all of the surfaces to hot gas. Typical size of limestone

  • Limestone and Dolomite and their Use in Iron and Steel

    8/5/2013· Limestone extraction is done by blasting, followed by crushing and screening. Depending on the chemical characteristics, limestone can be washed to remove the surrounding impurities such as clays. Calibrated stones size (Fig 1) of the lime stone depends on its further use. Finer-sized limestone can be used partially as raw material for self-fluxing sinters. Fig 1 Limestone. Dolomite is a

  • What is limestone used for when extracting iron? Answers

    Limestone can be helpful in many way, it depends on what state it is in and the uses can vary. As solid limestone or crushed limestone, it can be used by extracting iron from it's ore, to make

  • what is the role of limestone in extraction of iron??

    Iron is extracted from its ore, haematite, in a blast furnace. The ore is fed into the top of the furnace along with coke and limestone. The limestone decomposes in the hot furnace, forming calcium oxide. This reacts with the sandy impurities (silicon dioxide) to form a slag.

  • What is the function of limestone in that extraction of

    12/3/2018· Mostly quoted from Wikipedia Iron ore often has silicon dioxide (sand) impurity which must be removed during the process. To do this limestone is added. The limestone (chemically, calcium carbonate) decomposes in the heat of the furnace to calcium...

  • Limestone uses — Science Learning Hub

    Calcium oxide, obtained from limestone, acts as a pH regulator when extracting gold from quartz. The chemical extraction of gold from powdered quartz rock uses a solution of sodium cyanide. In this cyanidation process, the pH of the solution needs to be maintained between 10–11 to prevent the production of deadly hydrogen cyanide gas. The addition of calcium oxide to the solution maintains

  • use of limestone in iron extraction

    how limestone is used in extracting iron? Yahoo Answers. Mar 11 2008· Best Answer Limestone is used as a flux during the smelting of iron ore Well technically it's the calcium oxide which is used as the flux When limestone is added to molten iron it quickly decomposes into carbon dioxide and calcium oxide Sometimes calcium oxide (lime or quicklime) is used instead of . How iron is made

  • Limestone Its Processing and Application in Iron and

    7/7/2017· These kilns usually use limestone sizes ranging from 130 mm to 200 mm. In these types of kiln, the temperature rise must be slow and therefore the resultant residence time is long. Vertical kilns are fuel-efficient, but limited in capacity. In case of horizontal kilns, the kiln body rotates, allowing the limestone to tumble and exposing all of the surfaces to hot gas. Typical size of limestone

  • what is the role of limestone in extraction of iron??

    Iron is extracted from its ore, haematite, in a blast furnace. The ore is fed into the top of the furnace along with coke and limestone. The limestone decomposes in the hot furnace, forming calcium oxide. This reacts with the sandy impurities (silicon dioxide) to form a slag.

  • Limestone and Dolomite and their Use in Iron and Steel

    8/5/2013· Limestone extraction is done by blasting, followed by crushing and screening. Depending on the chemical characteristics, limestone can be washed to remove the surrounding impurities such as clays. Calibrated stones size (Fig 1) of the lime stone depends on its further use. Finer-sized limestone can be used partially as raw material for self-fluxing sinters. Fig 1 Limestone. Dolomite is a

  • What is limestone used for when extracting iron?

    Limestone can be helpful in many way, it depends on what state it is in and the uses can vary. As solid limestone or crushed limestone, it can be used by extracting iron from it's ore, to make

  • What is the role of limestone during the extraction of

    During the extraction of iron from haematite ore, limestone acts as a flux. Limestone decomposes froming CaO which reacts with silica forming slag. C a C O 3

  • What is the function of limestone in that extraction of

    12/3/2018· Mostly quoted from Wikipedia Iron ore often has silicon dioxide (sand) impurity which must be removed during the process. To do this limestone is added. The limestone (chemically, calcium carbonate) decomposes in the heat of the furnace to calcium...

  • GCSE CHEMISTRY Extraction of Iron in the Blast Furnace

    Extraction of Metals. Extraction of Iron.. Chemistry of the blast furnace ().. Limestone is calcium carbonate (CaCO 3) and it is added to the blast furnace to remove the impurities in the iron ore. Calcium carbonate is decomposed by heat in the furnace to give calcium oxide and carbon dioxide. This is called thermal decomposition (see examples of other carbonates).

  • Limestone uses — Science Learning Hub

    Calcium oxide, obtained from limestone, acts as a pH regulator when extracting gold from quartz. The chemical extraction of gold from powdered quartz rock uses a solution of sodium cyanide. In this cyanidation process, the pH of the solution needs to be maintained between 10–11 to prevent the production of deadly hydrogen cyanide gas. The addition of calcium oxide to the solution maintains

  • iron and steel chemguide

    This page looks at the use of the Blast Furnace in the extraction of iron from iron ore, and the conversion of the raw iron from the furnace into various kinds of steel. Extracting iron from iron ore using a Blast Furnace . Introduction. The common ores of iron are both iron oxides, and these can be reduced to iron by heating them with carbon in the form of coke. Coke is produced by heating

  • How Is Iron Extracted From the Earth? Reference

    26/3/2020· Magnetite and hematite are iron oxides; however, the extraction of iron from an iron oxide involves a series of steps that begins when mined iron ore is crushed into smaller pieces by a crusher and then washed. The second step in the process is calcination or roasting of the ore, which removes certain impurities, carbon dioxide and other substances. Through this process, ferrous oxide also