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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.
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Aug 09, 2014· The dry slag granulation process is essentially to atomize the liquid slag and then to cool the particles rapidly so as to produce a glassy slag. The atomization is done using a rotary cup air blast atomizer. The particles cool as they travel through the air and are then cooled further in a fluidized bed.
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Molten slags of blast furnace is a second resources with great value of 1600~1 800 MJ sensible heat per ton. At present, water-quenching process plays a leading role in recovering waste heat of the molten slags. However, this method not only cost lots of water, but also recover little sensible heat and can pollute the surrounding environment. Dry …
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Sep 14, 2020· Molten slag is broken up by supersonic air into droplets through the air quenching dry slag granulation technique. The breakup process of blast furnace slag directly determines the droplet diameter and the waste heat recovery. In order to gain deep insight into the granulation mechanism and visualize the breakup process, three …
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Jan 01, 2016· A dry granulation experiment was done by means of a rotary cup atomizer for blast furnace slag instead of the currently used …
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Jan 16, 2020· Dry Granulation of TBF Slag. The slag particles after the experiment were collected and screened according to different particle size. The morphology of slag particles after dry granulation process is shown in Fig. 2.It could be seen that the slag particles nearly in spherical shape of in 800, 1000, and 1200 rpm, the slag particles in strips …
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Slag is a high volume by-product from the metal smelting process. Globally, hundreds of millions of tonnes of molten slags are produced each year. Slag is commonly air-cooled in large pits and landfilled or used for road-based materials after crushing and screening. In some modern integrated steelworks, molten blast furnace slag is granulated ...
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Abstract: 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 multi-layer …
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Oct 18, 2017· Blast furnace slag (BFS) is a by-product from iron production in blast furnaces, which are fed by a mixture of iron-ore, coke and limestone. In the process, the iron ore is reduced to iron while all remaining materials form the slag, which is tapped off as a molten liquid and cooled.
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Publication Publication Date Title. CN201817499U Water processing system for blast-furnace slag granulation. CN203128593U Efficient blast furnace slag-washing water waste heat recycling system adopting INBA process. CN103866058B Blast furnace rotary drum method using exhaust heat of slag flushing water …
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Abstract: There is a growing interest in development of a dry slag granulation (DSG) process so as to recover the sensible and latent heats from molten slags and convert iron blast furnace slags into a glassy phase that is a suitable replacement for Portland cement. The combination of waste heat recovery and conversion of slag into a saleable
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Ground-granulated blast furnace slag is a latent hydraulic binder forming calcium silicate hydrates (C-S-H) after contact with water. ... To cool and fragment the slag a granulation process can be applied in which molten slag is subjected to jet streams of water or air under pressure. Alternatively, in the pelletization process the liquid slag ...
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Blast furnace slag is a nonmetallic byproduct of the manufacture of pig iron in a blast furnace. BFS consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates. BFS forms when slagging agents (e.g., iron ore, coke ash, and limestone) are added to the iron ore to remove impurities.
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Nov 13, 2022· To obtain a good slag reactivity or hydraulicity, the slag melt needs to be rapidly cooled or quenched below 800 °C in order to prevent the crystallization of merwinite and melilite. To cool and fragment the slag a granulation process can be applied in which molten slag is subjected to jet streams of water or air under pressure.
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C04B5/06 — Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag FR577662D Blast furnace slag granulation process Expired FR577662A ( en )
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Jan 01, 2019· 1. Introduction. Blast furnace slag, which is composed mainly of CaO, SiO 2, Al 2 O 3 and MgO, is the by-product of iron making. The molten slag is cooled rapidly by water quenching, and it solidifies into a sand-like product containing high content of silica and alumina in an amorphous state [].Because the finely ground water cooled slag has …
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The invention provides a blast furnace slag granulation engine and belongs to the technical field of metallurgy and power machinery. The engine comprises an engine base, a hollow shaft, an upper cover, a rotary core, a rotor body, an upper pressing disc, a hopper, an annular seat, a granulation device, a starting bevel gear, an output bevel gear and …
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Apr 10, 2013· Fig 1 Blast furnace slag and its processing. BF slag is sometimes erroneously classified, and often looked upon, as industrial waste material. ... grading curve and grindability are affected by different chemistry, liquid slag temperature, and granulation process conditions. Depending on different chemistry, granulation methods and …
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Mar 06, 2019· The main objective of the slag granulation plant is to process liquid blast furnace slag into valuable raw materials for the cement and construction industries. The value of the slag depends on its characteristics such as mineralogical, chemical, physical and mechanical properties, glass content, structure and moisture content.
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