Thermal Stability of Molten Slag in Blast Furnace Hearth

The thermal stability of the molten slag plays an extremely important role in smooth production blast furnace. In this paper, effects basicity, Al2O3 content and MgO on during heat fluctuations were investigated. effect basicity composition viscosity behavior was measured by rotating cylinder method under condition fluctuation constant temperature. temperature solid phase precipitation calculated. clarified. results show that specific capacity first decreases then increases as increases, it with rise well MgO. average change rate fixed is much more pronounced than at a variation Al2O3, while inverse for When reduced, has greatest temperature, followed content. It indicates helps to maintain stable Therefore, appropriately increasing slag, controlling lower maintaining suitable will help improve slag.