·Steel slag SS is a by product of the steel making process Approximately 200 million tons of SS are generated annually around the world yet the utilization rate of SS is less than 20% Zhuang and Wang 2021 In the past SS was discharged into nature and occupied much land Gencel et al 2021
·The mass production of steel is inevitably accompanied by large quantities of slags The treatment of ironmaking and steelmaking slags is a great challenge in the sustainable development of the steel industry Japan and China are two major steel producing countries that have placed a large emphasis on developing new technologies
·The core idea of gradual utilization is recycling steel slag step by step to make the most rational use of it at its different stages according to the characteristics of steel slag Steel slag after taping is treated first but the slag treatment process air granulated process rotary cylinder process layer pouring process and self
·Steel slag is an industrial by product of steel manufacturing processes and has been widely utilized within civil and construction materials for road materials and environmental remediation in countries like Japan USA and European Union nations However the current utilization of steel slag in Vietnam is very low mainly because of lack
·seen by comparing the compositions of blast furnace slag and steel making slag from Table 4 steelmaking slag contains not only Ca and Si but also Mg Mn Fe P and other elements having fertilizer effects Conversely blast furnace slag contains a considerable pro portion of Al Since Al easily combines with phosphoric acid in soil
·Steel making slag The slag used in the study was ground granulated blast furnace slag which is obtained by quenching molten iron slag a by product of iron and steel making from a blast furnace in water or steam to produce a glassy granular product Limestone flux is added to the ore to remove non ferrous contaminants
·Slag is the by product of iron and steelmaking processes Normally around half to one tonne of slag would be generated for yielding one tonne of rolled iron or steel Lobato et al 2015 It was reported that the world steel production was billion tonnes in 2016 which suggested that at least around 1 billion tonnes of slag is produced
·A common property of concrete manufactured with oxidizing steel making electric arc furnace or LD converter slags is their higher density of over 10% in comparison with natural aggregate concrete This material has therefore usually been recommended for walls or foundations where a high specific weight is not a disadvantage
This research focused on the treatment of steel making slags to recycle and recover iron and phosphorus The carbothermal reduction behavior of both synthesized and factory steel making slag in microwave irradiation was investigated The slags were mixed with graphite powder and heated to a temperature higher than 1873 K to precipitate a lump of Fe C
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