Limestone is a sedimentary rock comprising about 15% of the earth's sedimentary crust. Limestones are generally mined in the method of open pit mining and underground mining based on the economic and environmental conditions. Surface limestone mining. All over the world, the limestones are generally mined from a quarry or the open pit mining.

Limestone – which is a sedimentary rock – is a valuable resource from the Earth's crust. It has many uses. Limestone is also used to remove impurities from the blast furnace when making iron ...

How is limestone used in `Fe` extraction? Books. Physics. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Chemistry. NCERT P Bahadur IIT ... In extraction of iron, limestone is used for . 121568636 . 100+ 2.8k+ 1:49 . In haematite extraction, limestone is used as . 645336467 . 100+ 200+

(1) The ore of iron contains acidic gangue or impurity of silica,
(2) To remove silica gangue, basic flux like calcium oxide CaO, is required, which is obtained from the decomposition of limestone, .

(3) Silica reacts with CaO and forms a fusible slage of .

Therefore in the extraction of iron, lime is used.

Limestone is also a very important industrial mineral. Its chemical properties make it a valuable mineral for a wide range of industrial/manufacturing uses. Limestone is also one of the vital raw materials used in production of iron and steel. Limestone, by definition, is a rock that contains at least 50 % of CaCO3 in the form of calcite by weight.

Answer: 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 oxide. This reacts with the sandy impuri...

The main role of limestone in extraction of iron is to decomposes in hot furnace and form the calcium oxide. 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 …

Why is limestone used in extraction of iron? (1) The ore of iron contains acidic gangue or impurity of silica, SiO2. (2) To remove silica gangue, basic flux like calcium oxide CaO, is required, which is obtained from the decomposition of limestone, CaCO3. Therefore in the extraction of iron, lime is used…

> How is limestone used in Fe... chemistry. How is limestone used in F e extraction. A. Oxidation of F e ore. B. Reduction of F e ore. C. Formation of slag. D. Purification of F e formed. ... The flux used in extraction of Iron from haematite in the blast furnace is: Medium. View solution. In the refining of iron, phosphorous separates as : Medium.

Answer: Usually, limestone (calcium carbonate, CaCO3) is "calcined" in a lime kiln, where it is heated to form lime (CaO) and CO2 gas. The lime is then used in both steelmaking furnaces to refine liquid iron into steel, and also on ladles as slag to further refine the steel. It absorbs impuritie...

This concentrated ore is mixed with limestone (CaCO 3) and Coke and fed into the blast furnace from the top. It is in the blast furnace that extraction of iron occurs. The extraction of iron from its ore is a long and subdued process, that helps in separating the useful components from the waste materials such as slag. What happens in the Blast ...

Limestone then creates the slag. Impurities such as S, Si pass into the slag and the slag later can be easily separated to yield pure iron. The iron minerals that are used as ores are hematite, magnetite, limonite, and siderite. Hematite is the most important iron ore. Extraction of iron …

Coke Carbon (C) Used as a fuel and reacts to form carbon monoxide (needed to reduce the iron(III) oxide) Limestone Calcium carbonate (CaCO 3) Helps to remove acidic impurities from the iron by ...

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). ...