V85％fine-grained steel slag(≤4.75mm)was obtained by crushing,screening,and magnetic separation of steel slag powder(0～10mm).The fine grained steel slag powder,fine grained iron slag powder(≤4.75mm),and lime were mixed in a ratio of 45:45:10 to increase the hourly production by 1 ton.It was used for testing concrete C30,C40,and C50 admixtures,and its workability was good with similar slump.Compared with C50,C40 increased by 3.23％and 2.37％.The processing technology for fine-grained steel slag should use pre screening to send all the particle materials into the crushing process,which can improve the crushing rate of the particle materials.At the same time,by passing the screened materials through weak magnetic de ironing(l000Gauss),high-grade magnetic selected materials and fine-grained converter slag with a recovery rate of over 90％can be obtained.
Fine grainedHigh titanium blast furnace slagsteel slagConcreteAdmixture
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