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Slag solidified in large size pieces or in blocks is not reusable, and needs at least to be crushed and milled. The direct obtainment of a readily usable slag as in the case of blast furnace slags is not possible as water granulation, pouring the slag into a large mass of water, cannot be
of granulation tanks and/or INBA dewatering drums adapted to your furnace design and requirements. Blowing Box Jet Slag Granulation Area: Granulation Tank Blowing Box The slag granulation area links the hot slag runner of the blast furnace and the INBA dewatering system. This link is directly accomplished through the use of a granulation tank.
Blast furnace slag (BFS, see Wikipedia ground granulated blastfurnace slag) is a nonmetallic byproduct of the manufacture of pig iron in a blast furnace. BFS consists primarily of silicates, aluminosilicates, and calciumaluminasilicates.
Without the need of an upstream drying system for the blast furnace slag energy and as a consequence CO 2 can be saved. In summary dry granulation of blast furnace slag allows an environmental friendly and sustainable subsequent processing for one of the last big heat recovery potentials at a modern blast furnace.
PDF | Molten slags of blast furnace is a second resources with great value of 1600~1 800 MJ sensible heat per ton. At present, waterquenching process plays a leading role in recovering waste heat ...
In a process for granulating slag, from a blast furnace or a smelting reduction plant, in which a granule/water mixture formed during the granulation is fed to a granulation tank and then to a dewatering installation, in which the slag granules are dewatered. H2Scontaining vapors and gases formed during the granulation are at least partially condensed by injection of water in a condensation ...
Jan 01, 2018· The molten slag granulation experimental system consisted mainly of a molten slag supply unit, a centrifugalair blast granulation unit and an image capture unit, as shown in Fig. the molten slag supply unit, we employed a hightemperature furnace with a graphite crucible to melt the BF slag.
So, not only the sensible heat of the liquid slag is lost, but it is also necessary to have an upstream slag drying unit for using the granulated BF slag in cement industry. Drying process normally consumes heat energy up to 72Mcal/ton of slag. Dry granulation of liquid BF slag is being developed in many countries along with heat recovery process.
Depending on the availability of the raw materials and marketspecific requirements, further extenders are added to the common grinding process such as granulated blastfurnace slag. Mainly consisting of lime, silica acid, aluminum oxide, and magnesium oxide, blastfurnace slag is normally processed in granulation plants nowadays.
Slag handling is an important aspect of modern blast furnace operation. Today, blast furnace slag is a saleable product (granulated slag sand used as CO 2friendly substitute of clinker in cement production) rather than a difficult and costly waste Wurth has developed the INBA ® slag granulation process, incorporating our proprietary dynamic INBA dewatering drum.
P. Chindaprasirt, T. Cao, in EcoEfficient Masonry Bricks and Blocks, 2015. Ground granulated blast furnace slag concrete block. Granulated blast furnace slag is the glassy material formed by water quenching of molten slag discharged from the blast furnaces in the ironmaking industry. The water quenching process is termed granulation and its product, granulated blast furnace slag, is ...
approximately 80% of blast furnace slag sand is used as cement additive. The added value as cement additive is usually than utilizing the slag as aggregate material for road construction. The wet granulation process operates with a high water to slag ratio of about 8:1. The advantage of the wet process is that it
Aug 09, 2014· Dry Granulation of Blast Furnace Slag for Energy Recovery Around 300 kg of liquid slag is produced as byproduct while producing one ton of hot metal in a blast furnace (BF). This slag is at a temperature of around 1500 deg C and has a sensible heat of approximately 400 M Cal per ton.
The granulation of molten material, blast furnace slag for example, is accomplished by wetting the slag with a stream of water and thereafter transporting the thus formed granules away from the point of granulation with the water stream. Water consumption is minimized and average grain size increased by employing a multilayer water stream defined by currents having different temperatures and ...
Groundgranulated blastfurnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a byproduct of iron and steelmaking) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.
Dry Slag Granulation. Water granulation is the most commonly used method to handle blast furnace slag and requires a granulation and a dewatering step to process the slag. In water granulation, the energy in the slag is lost from water evaporation and cooling and is difficult or impossible to recover.
May 09, 2019· Primetals Technologies has developed a new innovative blast furnace dry slag granulation process with heat recovery at the voestalpine pilot plant in Linz, Austria. You want to know more about our ...
article{osti_, title = {Heat recovery in dry granulation of molten blast furnace slag}, author = {Tetsuro, N. and Hiroshi, N. and Koichi, F. and Tsukio, I.}, abstractNote = {In a research and development project undertaken jointly between IshikawajimaHarima Heavy Industries Co. and Sumitomo Metal Industries, Ltd., a process has been developed for granulating molten slag discharged ...
Primetals Technologies has provided blast furnace engineering, project excellence and expertise to customers worldwide for over a century. Our technology base covers the entire blast furnace process route from hot blast and raw material handling, through the furnace and casthouse, to gas cleaning and hot metal / slag processing.
Moisture in blast furnace slag, which occurs in the granulation process or in pelletized slag, should be removed by drying prior to the use of GGBFS as either an additive to Portland cement or a mineral admixture to Portland cement concrete. Grinding
Blast Furnace Slag is formed when iron ore or iron pellets, coke and a flux (either limestone or dolomite) are melted together in a blast the metallurgical smelting process is complete, the lime in the flux has been chemically combined with the aluminates and silicates of the ore and coke ash to form a nonmetallic product called blast furnace slag.
Granulation This process transforms molten slag into granules. Skyway Cement receives granulated slag from a US steel manufacturer in Gary, Indiana. In the blast furnace at the steel works, slag is produced when the mineral components of th e metal refining process separate from and float on the molten iron. The iron is drawn off to be further ...
May 05, 2013· Concept of slag granulation. The process of slag granulation involves pouring the molten slag through a high pressure water spray in a granulation head, located in close proximity to the blast furnace. Granulation process is the controlled quenching of the slag in cold water which does not give time for crystalline growth to take place.
Nov 07, 2013· for the blast furnace slag energy and as in consequence CO 2 can be saved. In summary dry granulation of blast furnace slag allows an environmental friendly and sustainable subsequent processing for one of the last big heat recovery potentials at a modern blast furnace. [1] References [1] McDonald, I., Long, E., Werner, A.
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