METHOD FOR OBTAINING SLAG

摘要

PURPOSE: A method or manufacturing a slag is provided to lower melting temperature of dry sludge and water permeability and enhance strength. CONSTITUTION: A method for manufacturing a slag comprises: a step of drying dehydrated sludge from waste water and adding silicon oxide(SiO2) to the dry sludge; and a step of melting the dry sludge. The hydration rate of the dry sludge is 20-40%. The silicon oxide is added to the dry sludge. The method further comprises a step of adding calcium oxide(CaO) and ferric oxide(Fe2O3).