Abstract：Steel slag with different basicity was prepared by the high temperature remelting method using converter steel slag as raw material. Slag-H2O/CO2 oxidation was carried out to produce H2/CO gas energy, as well as improve the magnetic properties of slag and increase the comprehensive utilization rate of slag. It was found that the main precipitated phases changed from olivine to magnesia rhodonite and finally to dicalcium silicate with the increasing basicity. And the RO phase had gradually exsolved from the main phase. With the same ferrous iron content, the slag with high basicity can greatly promote the oxidation reaction efficiency. The maximum gas production of the slag sample with a basicity of 1.83 was H2 (32.3 cm3/g) and CO (22.1 cm3/g), and the conversion rate reached 83.7%, 57% and it was only 40.5% and 32% respectively for the basicity of 1.13. The magnetic separation efficiency of oxidized slag samples was improved and it increased from 14.85% to 78.75% for the sample with basicity of 2.13.
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2021, Vol. 31 
