Abstract: Through the process mineralogy studies, the chemical composition, mineral composition, the occurrence and disseminated characteristics of Ca and Fe of Meishan steel slag were identified. On this basis, two tests on the comprehensive utilization of steel slag were carried out: one was based on the basic properties of steel slag to carry out the tests of treating acid wastewater from sulfuric acid plant with steel slag, but no good result was obtained; The other was based on the compositions of steel slag to make tests of steel slag as the iron corrective agent for cement, which achieved good effect, thus providing an effective way for comprehensive utilization of Meishan steel slags.

Key words: Steel slag, Process mineralogy, Comprehensive utilization, Iron corrective agent for cement