importance of slag formation removal in blast furnace

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Blast Furnace Slag Operation

06052016· Description...

Blast furnace

Lead blast furnaces are often open-topped rather than having the charging bell used in iron blast furnac The blast furnace used at the Nyrstar Port Pirie lead smelter differs from most other lead blast furnaces in that it has a double row of tuyeres rather than the single row normally used...

Blast Furnace

03052010· Blast Furnace Modern furnaces are equipped with an array of supporting facilities to increase efficiency, such as ore storage yards where barges are unloaded The raw materials are transferred to ....

Basics of slag production

Such combinations alone will not give a good fluid slag and so silica is usually added to promote melt formation This gives a slag of different composition from either blast furnace or steelmaking slag, and which may be glassy or crystalline depending on the cooling routine The result can be a strong and stable material, suitable as an ....

Steelmaking Slag

04042012· Compared to blast-furnace slag, steelmaking slag usually contains a much higher amount of lime, which can cause formation of dicalcium silicate, 2CaO-SiO 2 (sometimes formulated as 2CaOSiO 2), which can cause disintegration upon cooling due to a volume increase when changing from one crystalline form to another (from the β form to the γ ....

What is the importance of slag in metallurgy?

Slags serve a variety of functions First, they are usually composed of refractory oxide compounds, such as mixtures of calcium oxide, aluminum oxide, silicon oxide, etc They have low thermal conductivity, so they provide a "blanket" to keep molt....

GCSE CHEMISTRY

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)...

The Extraction of Iron

The calcium silicate melts and runs down through the furnace to form a layer on top of the molten iron It can be tapped off from time to time as slag Slag is used in road making and as "slag cement" - a final ground slag which can be used in cement, often mixed with Portland cement...

Blast Furnace Slag

Blast Furnace Slag Blast furnace slag (BFS) is a product of iron production, which has been widely investigated and utilized, particularly as a supplementary cementitious material for cement or alkali-activated material, owing to its high hydraulic property or alkali activation reactivity...

Industrial uses of slag (the use and re

Industrial uses of slag (the use and re-use of iron and steelmaking slags) , The variation in composition and properties of blast furnace slags are largely determined by the gangue in the ore and ash in the coke and much progress has been made in the re-use of such slag With respect to steelmaking slag, emphasis has in recent years been placed on hot metal treatment before refining ,...

EXTRACTION OF IRON

CaO now reacts the impurities of ore called GANGUE to form slag Slag is the mixture of CaSiO 3 and Ca(AlO 2) 2 The slag floats over the top of molten iron Slag is a useful byproduct It is used in road making, cement manufacturing a light weight building materials...

Blast Furnace Slag

Blast furnace slag materials are generally available from slag processors located near iron production centers Cements containing ground granulated blast furnace slag are available from many producers of Portland cement or directly from ground granulated blast furnace slag cement manufacturers AASHTO M240 describes three types of blended ....

Steel Slag

Table 18-2 lists the range of compounds present in steel slag from a typical base oxygen furnace Virtually all steel slags fall within these chemical ranges but not all steel slags are suitable as aggregat Of more importance is the mineralogical form of the slag, which is highly dependent on the rate of slag cooling in the steel-making process...

Extracting iron

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

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