Study on rapid stabilization of steel slag powder

摘要

Dry ball milling and wet ball milling were used to treat converter slag with particle size < 10 mm and the converter slag powder was stabilized by H2O only and H2O coupled with CO2.respectively.Results showed that when CO2 &H2O was used,the free-calcium oxide（f-CaO） content in converter slag decreased significantly and after an-hour treatment the f-CaO content was reduced to 3%;however,when only treated by H2O without CO2, f-CaO needed 3-hour stabilization to decrease its content to 3%.When f-CaO in converter slag powder was treated by CO2 &H2O,its main reaction products were CaCO3 and then Ca（OH）2;however,when only H2O was used, the f-CaO content decreased gently and the main products were Ca（OH）2.