Menu
The volume of slag varies according to the raw materials used to produce pig iron typically 300 kg of blast furnace slag are produced per ton of pig iron The amount of this waste material pro duced at CSN Companhia Sider urgica Nacional RJ Brazil for example is approximately million tons per year The use of this material is an
Get Price
Ground granulated blast furnace slag GGBS is a by product from the blast furnaces used to make iron Blast furnaces are fed with controlled mixture of iron ore coke and limestone and operated at a temperature of about 1 500°C When iron ore coke and limestone melt in the blast furnace two products are produced—molten iron and molten slag
Get Price
The blast furnace slag should be a freeflowing one at the operating temperatures to ensure efficient slag metal separation It must have appreciable affinity for the gangue constituents to facilitate the production of metal of choice Yet from the available heat in the hearth point of view 1 the blast furnace slag should be neither very viscous nor very fluid In addition a
Get Price
the furnace heat to a little higher level before shutdown with intensifying hearth cooling 1 INTRODUCTION The main wear mechanisms for the lining of the hearth are abrasion caused by flowing hot metal/slag and corro sion caused by dissolution or chemical reaction Once eroded refractory are not repaired easily Therefore the campaign life of a blast furnace is essentially limited by the
Get Price
This paper deals with the incorporation of blast furnace granulated slag in sand lime materials as a replacement for hydrated lime during autoclaving conditions The slag grain size grinding and the heat treatment in saturated vapour pressure autoclave conditions were investigated to study the compressive strength behaviour of the new
Get Price
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 The constituents of the GGBFS are as shown in the table below Table 1 Constituents of the Ground Granulated Blast Furnace Slag
Get Price
The heat of hydration of the hardened blast furnace slag is less than half of that of Ordinary Portland Cement OPC however the formed ettringite contributes greatly to initiating BFS hydration and hardened BFS formed by this method exhibited compressive strengths of 83% 58% and 54% of that of OPC after 28 days Properties of the hardened blast furnace slag were characterized by the heat
Get Price
including blast furnace slag silica fume and fly ash are considered artificial [1 4] Slag has Slag has been identified and is being used to directly replace cement on a large scale [1]
Get Price
Feb 1 2022The treatment of liquid blast furnace BF slag a by product of the iron making process is one of the breakthrough points since it contains a large amount of high grade thermal energy [ 3 4] and can be used as a cement material after rapid cooling [ [5] [6] [7] ]
Get Price
Mar 12 2022The importance of blast furnace BF slag in achieving smooth operation of the BF is illustrated by the old saying if you take care of the slag the furnace will take care of the rest There has been a tremendous quantity of work has been done on the BF slag studying the properties formation mechanisms and impacts on the furnace operations
Get Price
[Show full abstract] ash and blast furnace slag on the workability and compressive strength of the concrete prepared with poor sand gradation The results showed that the poorly graded sand and
Get Price
A shaft furnace for producing pig iron by charging an iron source of high metallization rate whose average metallization rate is 95% or greater and a solid fuel containing 70 to 100 mass% of blast furnace coke in layered state or mixed state from the furnace top onto a bed of coke filling a lower region of the furnace and melting the iron source by blowing in air through tuyeres at the bottom
Get Price
What is Ground Granulated Blast Furnace Slag GGBS The ground granulated blast furnace slag GGBS is a by product of iron manufacturing which when added to concrete improves its properties such as workability strength and This material is obtained by the heating of the iron ore limestone and coke at a temperature of about 1500 o C The process is carried out in a blast furnace
Get Price
The reactivity effect of calcium carbonate present in ground oyster shells and limestone filler on the formation of carboaluminate phases in ground granulated blast furnace slag blended cement pastes was reported in this paper Six different binary and ternary blended cement pastes were prepared using ground granulated blast furnace slag ground oyster shells and limestone filler with
Get Price
A newer Japanese Standard JIS A 5011 1 2024 Slag Aggregate for ConcretePart I Blast Furnace Slag Aggregate was published in 2024 JIS 2024 This is a detailed document describing the use of both ACBFS as coarse aggregate and rapidly cooled blast furnace slag as fine aggregate With regard only to ACBFS the following items are presented
Get Price
At 900 1500 K In the lower sections of the furnace C C O 2 → 2 C O F e O C O → F e C O 2 The limestone also decomposes to CaO which removes the silicate impurity of the ore in the form of Slag It can be easily separated out of molten iron The iron manufactured in Blast Furnaces contain about 3 4 % of Carbon and smaller
Get Price
An analysis by EDX reveals that within this zone goethite must have reacted with the blast furnace slag and the converter slag to form a complex metal oxide/hydroxide compound Figure shows schematically the different zones of a blast furnace At the bottom where blast air is injected temperatures of up to 2024 °C are reached
Get Price
Data on the thermochemical properties of substances on the thermal effects of chemical reactions on the degree of carbon graphitization in coke on the heats of formation of metallic and slag solutions on the thermochemical characteristics of ferromanganese slag and gas phase were systematized and corrected Heat losses for a particular type of blast furnaces are taken into account The
Get Price
jet the combustion of coke and injected fuels coke particle size fuel injection rates slag volume and other complex factors A 3 D CFD mathematical model has been established for estimating the raceway geometry and combustion inside the blast furnace This model considers the effects
Get Price
Blast furnace BF slags have been utilized in cement concrete aggregate roadbed materials and earth work materials If an appropriate control of the elution and compound formation is developed under severer environmental conditions their usage would be more diverse Because the chemical composition of BF slag is similar to that of Portland cement the possibility of ettringite 3CaO·Al
Get Price
Six different binary and ternary blended cement pastes were prepared using ground granulated blast furnace slag ground oyster shells and limestone filler with different replacement levels from 5 to 35% The carboaluminate formation was assessed and quantified directly using X ray diffraction XRD and indirectly by following the aluminate phase s reaction heat flow and consumed calcium
Get Price
Hydrothermal solidification of blast furnace slag by formation of tobermorite Journal of Materials Science 2024 Toshiyuki Hashida Download Download PDF Full PDF Package Download Full PDF Package This Paper A short summary of this paper 23 Full PDFs related to this paper Read Paper
Get Price
At the bottom of the furnace where temperatures rise well over 3000 Fahrenheit molten slag floats on a pool of molten iron which is four or five feet deep Because the slag floats on top of the iron it is possible to drain it off through a slag notch in the furnace The molten iron is released from the hearth of the furnace through a tap hole
Get Price
Microstructural and thermal analyses of the MgO activated slag composites were carried out by means of a scanning electron microscope and a thermogravimetry analysis respectively The content of MWCNTs and the curing conditions affected the overall electrical resistivity compressive strength and heat generation properties of the composites
Get Price
Fig 1 Blast furnace slag and its processing BF slag is sometimes erroneously classified and often looked upon as industrial waste material In actual fact this by product is valuable and extremely versatile construction material The history of slag use in road building dates back to the time of the Roman Empire some 2024 years ago when broken slag from the crude iron making forges of
Get Price
2 days agoThe blast furnace slag contains a large amount of silicon oxide and calcium oxide When the blast furnace slag grinding reaches 80 100 mesh an appropriate amount of silicon activator is added and then the silicon fertilizer can be obtained after stirring and mixing Due to the photosynthesis of crops silicon fertilizer can improve the
Get Price
Depending on the process that the slag involves in they can be classified into ironmaking slag mostly blast furnace slag BFS and steelmaking slag including electric arc furnace slag EAFS
Get Price
The melting point of the slag is to be neither too high nor too separates in the extraction of iron as View of C S H in calcium hydroxideblast furnace slag Formation of C S H in calcium hydroxideblast furnace The slag grain size grinding and the heat treatment in saturated vapour Blast furnace slag with different specic surface partially replaced the lime
Get Price
Zone of slag formation in blast furnace In the blast furnace calcium carbonate molecule breaks down in calcium oxide and carbon dioxide in slag zone C a C O 3 → C a o C O 2 definition Zone of heat absorption The heat evolved in this exothermic reaction raises the temperature at the bottom of the furnace to about 1900 C The heat absorbed in this endothermic reaction lowers the
Get Price
The invention discloses a method for preparing inorganic fibers by using direct blowing of blast furnace molten slag and belongs to the field of inorganic nonmetallic material preparation The method comprises the following steps conveying high temperature molten slag generated in a blast furnace to a high temperature quenching and tempering furnace through a slag groove adding a quenching
Get Price