Is blast furnace continuous process?
The production of iron in a Blast Furnace is a continuous process. The furnace is heated constantly and is re-charged with raw materials from the top while it is being tapped from the bottom. The energy costs of the operation are kept to a minimum by collecting and cleaning the hot gas that leaves the furnace.
What are the roles of metallurgical coke in ironmaking blast furnace process?
In the blast furnace route of ironmaking, metallurgical coke are used for four main purposes: first to act as a reducing agent, second to fulfil the energy demand of the endothermic reduction reactions, third to maintain the structure and permeability inside the furnace and fourth to act as a carburiser for freshly …
What are the main parts of a blast furnace?
The components of a blast furnace include the Charge, exhaust gas outlet, charging bells, gas outlet, tuyeres, taphole, bustle pipe, slag hole, refractory lining, and conveyor system.
What do blast furnaces do?
Blast furnaces are used to produce pig iron from iron ore for subsequent processing into steel, and they are also employed in processing lead, copper, and other metals. Rapid combustion is maintained by the current of air under pressure.
Which process takes place in blast furnace?
Blast furnaces operate on the principle of chemical reduction whereby carbon monoxide converts iron oxides to elemental iron.
What is the purpose of coke in metallurgical process?
Metallurgical coke, along with iron ore and limestone, is layered into a blast furnace to convert the iron ore to metallic iron. Coke, which is mostly carbon, reacts with the blast air to produce carbon monoxide, which, in turn, reacts with the iron oxide to produce carbon dioxide and metallic iron.
What is metallurgical coke used for?
Most metallurgical coke is used in iron and steel industry processes such as blast furnaces, sinter plants, and foundries to reduce iron ore to iron. Over 90 percent of the total metallurgical coke production is dedicated to blast furnace operations.
Why limestone is used in blast furnace?
Limestone is also used to remove impurities from the blast furnace when making iron. The impurities are mostly silicon dioxide (also known as sand). The calcium carbonate in the limestone reacts with the silicon dioxide to form calcium silicate (also known as slag).
What is the product obtained from blast furnace?
pig iron
Detailed Solution. A blast furnace is a type of furnace which converts a mixture of metallic ore, coke, and flux into liquid metal by introducing air under high pressure. The product of blast furnace is pig iron which is an intermediate product in the production of steel. It is also called crude iron.
