Blast furnace slag is a nonmetallic coproduct produced in the process in the production of iron from iron ore or iron scrap. It consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates. The molten slag, which absorbs much of the sulfur from the charge, comprises about 20 percent by …

Why sinter is used in blast furnace? Sinter plants agglomerate iron ore fines (dust) with other fine materials at high temperature, to create a product that can be used in a blast furnace. The purpose of sinter are to be used converting iron into steel. Sinter plants, in combination with blast furnaces, are also used in non-ferrous smelting.

Sinter is the primary feed material for making iron in a blast furnace. According to the U.S. Environmental Protection Agency, the sintering process converts fine-sized raw materials, including iron ore, coke breeze, limestone, mill scale, and flue dust, into an agglomerated product, sinter, of suitable size for charging into the blast furnace. ...

Swastibrata. One of the most important reasons of using Hematite in blast furnace is that it is very easy to fuse at very lower temperature, as here iron is not strongly bonded with oxygen & as a result we can easily break the bond between iron and oxygen (Fe2O3) and extract metallic iron economically. Read more.

Addition of dolomite through sinter is more preferred route since CO2 of dolomite is driven out during the sintering process. In case of sintering, dolomite is crushed to -3 mm (in the range of 85 % to 90 %) in hammer crushers before mixing it in the sinter mix. In case of direct feed to blast furnace, lump dolomite (10 mm to 30 mm size) is used.

Sinter is a mixture of coke, limestone and ore created to place in the blast furnace. Why is sinter used? Sinter has a higher surface area than its separate ingredients, so it will react faster

in a huge container called a blast furnace. Iron ores such as haematite contain iron(III) oxide, Fe 2 O 3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind.

blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. 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.

Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. Compared with pellets, production of sinter is cheaper, and compared with lump ore, fluxed sinter is often more reducible with better softening characteristics.

Iron Ore is the most important raw material needed to produce steel. However, it cannot be used directly in the blast furnace. That is why sinter is created that helps convert iron into steel. Rashmi Metaliks has its own Sinter Plant set up at 2007 to have complete control over the quality of materials used in the steel production process.

Pellets are preferred feed for blast furnace and DRI units in view of better metallurgical .... 21) is a major advantage over conventional DRI. Read more. ... Jul 7, 1992 ... An improved iron ore sinter for use in a blast furnace is made from a ... On a world-wide basis, sinters are preferred over pellets approximately in the proportion of ...

However, it cannot be used as it is in the blast furnace and it is here where we find the usage of Sinter in converting iron into steel. Rashmi Metaliks set its own Sinter Plant in 2007 so as to have complete control over this important ingredient so as to provide world class product.

• The hot sinter is then cooled on a cooler • The cooled sinter is screened to remove -5mm fraction and then transported to blast furnace. 49. Need of Intensification of sintering 49 process Why? Intensification of sintering process is required to enhance the production capacity of existing sinter machines. How?

A blast furnace (BF) is the dominant process for making iron in the world. The BF is charged with metallurgical coke and iron burden materials including iron ore pellets, sinter, and lump ore. While descending in the BF the charge materials reduce.

A blast furnace charge consists of coke, ore or sinter, and limestone. These materials must be in lumps of a certain size (40-60 mm). Larger lumps prolong the process of reduction and fluxing. Smaller lumps block the flue-gas passages and prevent a uniform descent of melting materials in the furnace. 2. IRON ORES: Ore is a metal bearing mineral.

Why Use Coke for Blast Furnace Ironmaking not Use Coal Directly? Coke is an important raw material in the smelting process of the blast furnace, accounting for about 45%. Others include pellets, sinter, lump ore, limestone and so on. Regarding coke, some people may have doubts. Coke and coal are all high-heating fuels.

Sinter is the primary feed material for making iron and steel in a blast furnace. According to the U.S. Environmental Protection Agency, the sintering process converts fine-sized raw materials, including iron ore, coke breeze, limestone, mill scale, and flue dust, into an agglomerated product, sinter, of suitable size for charging into the ...

Because it is more reactive then carbon to be extracted in a blast furnace. Remember carbon is the reducing agent and for it to work the metal being extracted has …

Sinter and pellets are agglomerated forms of iron ore, both suitable for use as blast furnace burden materials. The principle difference between sinter and pellets arises from the type of raw materials used in their preparation and the nature of the sinter and pelletizing agglomeration processes.

RAW MATERIAL S USED IN BLAST FURNACE :- Iron ore, including Sinter, Pellet etc. Coking Coal or Readymade Coke Pulverized Coal / Tar etc. for tuner injection Limestone, Dolomite, Proximate etc. as flux Quartzite,Unite etc. to adjust alumina / silica ratio Iron Ore:- Iron content in earth's crust is about 4.5% and is the…

Answer: For three reasons. One, Pellet swells after heating. Swelling is upto 200% by volume. This increase in volume reduces permeability of ascending gases inside furnace. Secondly, sinter being irregular in shape offers more permeability than pellet beacause of …

sinter,and2pcsper25–32mmforlumpore.Theseparticlesizes were chosen so they correspond to sizes which are mostly used in a BF. The experiments were made with blast furnace simulator (BFS),[12] as shown in Figure 1. The BFS is a tube furnace with an inner diameter of 95mm that was used to carry out high-

Why is limestone used in blast furnace? – MVOrganizing. An alternative raw material for the blast furnace is iron ore sinter. Limestone and lime added to the sinter react with impurities and balance the slag composition of pig iron production.

BLAST FURNACE PRODUCTS AND THERE USE SIZE OF BLAST FURNACE Design of blast furnace is evolved through experience . Calculation of blast furnace size is empirical in nature. Hearth dia of possco b/f increases from 9.5-13.5 Hearth area increased from 1660 mtr sq -3800 mtr sq . Now there are nearly 700 blast furnace available in world.

Blast furnace productivity greatly depends on the quality of sinter. Sinter is to have optimum grain distribution, high strength, high reducibility, high porosity, softening temperatures greater than 1250 deg C, constant FeO content in the range of 7 % to 8 % and constant basicity.

Use of BHQ in blast furnace helps in decreasing slag rate by ~8 kg/thm primarily due to low Al 2 O 3 input from reduction in sinter quantity in the burden. BHQ usage to the tune of 25 kg/thm as partial replacement of silica source is found to be optimum without affecting the furnace operation.

The sintering process is used to agglomerate a mix of iron ores (blend), return fines, fluxes and coke, with a particle size of less than 10 mm, so that the resulting sinter, with a screened size of 10 mm to 30 mm, can withstand pressure and temperature conditions in the blast furnace.

High top pressure also reduces the coke rate in the blast furnace. With every increase of top pressure of the blast furnace by 0.1 kg/sq cm there is a reduction of around 0.1 % in the coke rate. Decreasing of fines content in the charge materials improves the coke rate of the blast furnace in the range of 0.4 % to 0.7 %.

An iron blast furnace produces hot metal containing 95% Fe. The iron ore charged into the furnace contains 95% Fe2O3 and the rest is gangue. Assume that …

Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. Compared with pellets, production of sinter is cheaper, and compared with lump ore, fluxed sinter is often more reducible with better softening characteristics.

Most of the copper used is obtained from copper ores, which are mined. The copper ore chalcopyrite is heated in a furnace to produce copper sulfide, CuS The furnace is heated by burning fossil fuels. Air is then blown through the hot copper sulfide, to produce copper and sulfur dioxide.

The process of sinter making originated from a need to make use of fines generated in mines and in ore benefiCiation plants. With the development of sintering technology, a sintering plant has become a tremendous success for providing a phenomenal increase in productivity and saving in coke rate to the blast furnace. The technology of sinter making

Iron oxides can come to the blast furnace plant in the form of raw ore, pellets or sinter. The raw ore is removed from the earth and sized into pieces that range from 0.5 to 1.5 inches. This ore is either Hematite (Fe 2 O 3 ) or Magnetite (Fe 3 O 4 ) and the iron content ranges from 50% to 70%.

Why sinter is used in blast furnace? The purpose of the sinter plant is to process fine grained raw materials into a coarse grained iron ore sinter, ready to be charged to the blast furnace. Sintering of fine particles into a porous clinker – sinter – is necessary to improve the permeability of the burden, making reduction easier.