Iron obtained directly from the furnace is called 'pig iron' from the name of the mould that were used to carry away the molten iron (i.e. pigs and sows). Pig iron contains many elemental impurities. Give the symbols of 5 of these.
Extracting iron from iron ore using a Blast Furnace 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 coal in the absence of air.
Iron produced from the blast furnace separates from the slag by sinking to the bottom; slag is less dense than iron. It is then tapped of and used commercially for many applications and uses. The slag is cooled down and used by builders to construct roads.
Iron Blast Furnace Slag (BFS) This is the co-product from the reduction of iron ores to produce molten iron and molten slag. 1. When allowed to cool slowly to a crystalline rod< form It becomes a light gray vesicular rock known as Air-Cooled Blast Furnace Slag. Principle uses include:
The process of the extraction of iron is carried out by the following steps: Concentration of ore ... The blast furnace is a cylindrical tower like structure about 25m to 35m high. ... The slag floats over the top of molten iron. Slag is a useful byproduct. It is used
Sep 09, 2015· The purpose of a blast furnace is to reduce and convert iron oxides into liquid iron called "hot metal". blast refractory defferent part The blast furnace is a huge, steel stack lined with ...
The purpose of a blast furnace is to reduce and convert iron oxides into liquid iron called "hot metal". The blast furnace is a huge, steel stack lined with refractory brick. Iron ore, coke and limestone are put into the top, and preheated air is blown into the bottom.
Analysis of Slag Flow in Blast Furnace during the Extraction of Iron 1Mayurkumar S Suthar, 2 Prof. ... Abstract - The project aim set measurement of flow characteristics of blast furnace slag. The industrial slag (actual slag from ... The iron making blast furnace is a complex high temperature counter current reactor in which iron bearing ...
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.
IRON BLAST-FURNACE SLAG Blast-furnace slag is defined by the American Society for Testing and Materials as "the non-metallic product consisting essentially of silicates and alumino-silicates of calcium ... Properties and Uses of Iron and Steel Slag NATIONAL SLAG ASSOCIATION .
The slag obtained in the blast furnace process which floats on top of the hot metal in the launder, due to its low specific gravity, is separated from the metal and poured into slag dumps where it solidifies or is immediately granulated with high-pressure water.
Extraction of Metals. Extraction of Iron. ... The calcium silicate (called slag) floats on the liquid iron. Since iron is below carbon in the reactivity series, iron in the ore is reduced to iron metal by heating with carbon (coke). It is actually carbon monoxide which does the reducing in the blast furnace.
The molten iron and liquid slag are removed from the furnace through the tap holes at the base. The slag can be used to make bi-products such as cement. The hot gases produced are cleaned and are then burned as a fuel in the hot blast stoves that are used to preheat the air that is blown into the furnace.
A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being "forced" or supplied above atmospheric pressure.. In a blast furnace fuel (), ores, and flux (limestone) are continuously supplied through the top of the furnace, while a hot blast of air ...
Iron can be extracted by the blast furnace ... The Method. Three substances are needed to enable to extraction of iron from its ore. The combined mixture is called the charge Iron ore, haematite - often contains sand with iron oxide, Fe2O3. Limestone (calcium carbonate). ... 75% iron ore blast furnace slag 25% minerals (usually basalt) PF ...
Feb 29, 2008· Pig iron – The molten iron from the bottom of the blast furnace is pig iron. It contains 3.5 - 4.5% carbon and varying amount of contamination such as, sulfur, silicon and phosphorus. Pig iron is the intermediate step on the way to cast iron and steel.
limestone is used to remove impurities in the furnace and the main impurity of the blast furnace is silica (sand and rock) which is silicon dioxide. silicon dioxide is a solid at furnace temperatures so it reacts with calcium oxide from the decomposition of limestone (CaCO3). this result into the formation of calcium silicate (CaSiO3) or slag which is a liquid. slag flows to the the bottom of ...
Extraction of iron and its conversion into steel. IRON AND STEEL. 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. ... This forms a slag on top of the iron and …
Iron Silicate, Iron Silicate Suppliers and Manufacturers blast furnace extraction of iron Iron Silicate, Wholesale Various High Quality Iron Silicate Products from Global Iron Silicate Suppliers and ... hot sale! blast cleaning iron silicate/copper slag grit.
Jul 21, 2014· Iron extraction in a blast furnace. Hottest part of the furnace. ... FOUR raw materials are added to a blast furnace. Iron ore-such as haematite, which is a form of Iron (III) oxide, ... The slag floats on top of the molten iron, because it is less dense than the iron, and is tapped off separately. ...
Sep 04, 2012· At the base of the furnace, slag floats on top of the molten iron. It is then cooled and used for making roads. The following figure depicts the inside of a blast furnace, and how iron is extracted from haematite [Figure 5] .
GGBFS is obtained as a by product in the extraction of iron from it ore. The process of extraction of iron is blast furnace. The slag that is obtained on the iron ore is separated and cooled down slowly, which results in the formation of nonreactive crystalline material.
Iron is produced (extracted) in a blast furnace by reducing iron oxides with carbon and it is the carbon that removes the oxygen from the iron oxides – the carbon is known as the reducing agent. Coke is a cheap and readily made reducing agent.
A blast furnace is an incredibly expensive capital investment- in addition to the blast furnace, you will need a coke plant and a lime operation as well as a huge investment in raw material handling for Iron Ore, limestone, and Coal for the coke plant.
The molten calcium silicate (known as slag) floats on top of the molten iron at the base of the furnace. Here it is tapped off and cooled to use in building roads. ... Fig.3 below show the stages in the extraction of iron using a blast furnace. Figure 3. Inside a blast furnace. Which two word equations show the . reduction.
Both the slag and iron are drained from the bottom of the furnace. The slag is mainly used to build roads. The iron whilst molten is poured into moulds and left to solidify - this is called cast iron and is used to make railings and storage tanks.