·The granulation evolutions were shot by the high speed camera and the temperature distributions of the molten slag during granulation were acquired using the Experimental investigation on molten slag granulation for waste heat recovery from various metallurgical slags Appl Therm Eng 103 2016 pp 1112 1118 View PDF View article View
·CSIRO has been investigating the dry granulation of slags since 2002 and has developed a new integrated slag treatment process based on a two step process involving a dry granulator and a moving
·The materials except the disintegrated ladle slag were crushed with a jaw crusher Retsch BB3 to <30 40 The water granulation of the slags re melted in the MgO crucible system was carried out in the same way as for the ladle slag For the semi rapid cooling the re melted slag was left to cool in the MgO crucible
·Slags are byproducts of the metallurgical industry It is of importance to recycle materials and recover heat from metallurgical slags to reduce the energy consumption and environmental impact of steel industry China is the largest iron and steelmaking slag producer in the world and intensive efforts have been made during last decades for slag valorisation
·In the present granulation process the proportion of gas quenched steelmaking slags with particle sizes of 2 mm could be as high as % 2 The developed phases of the gas quenched steelmaking slags with different components are mainly Ca 2 SiO 4 C 2 S Ca 2 Fe 2 O 5 C 2 F and RO MgO FeO solid solution phases
·Granulation of molten metallurgical slags is a value adding process that converts a low value byproduct and sometimes waste into a saleable product with multiple uses by the building and construction industries In particular when ironmaking slag is granulated and is substituted for Portland Cement the environmental and economic benefits
·Blast furnace BF slag is one of the major high temperature molten slags in the metallurgical industry According to World Steel Association [12] the global BF slag production was estimated to be approximately 400 Mt 300 kg slag/t pig iron and the associated waste energy is equivalent to approximately 20 Mt standard coal approximately 1 700 MJ/t slag [13]
·[13] M Yoshinaga K Fujii T Shigematsu T Nakata Method of Dry Granulation and Solidification of Molten Blast Furnace Slag Tetsu To Hagane 67 1981 917â 924 [14] S K Nath S Kumar Influence of iron making slags on strength and microstructure of fly ash geopolymer Construction and Building Materials 38 2013 924â 930
·This investigation utilizes a SHTT single hot thermocouple technique for visualizing phase transformation in the BF slags SHTT combines the advantages of optical observation and the low inertial of the system which makes it possible to achieve a high heating and cooling rate with a maximum rate of 50 K/s and to observe crystallization phenomena at
Dry powder granulation of slag melts by gas atomization offers a means of reducing the resource expenditure associated with the conventional wet processing of blast furnace slags BFS Slags are a by product of the iron production process and are subsequently processed to create a fine powder which is then used in the manufacture of building
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