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In steelmaking processes, a CaO-based slag is used to remove impurities from steel. Various solid oxides, such as quicklime and dolomite, are used for producing the slag. The dissolution rates of these oxides in the molten slag play an important role for increasing the reaction rate between the steel and slag, decreasing the amount of flux, decreasing the energy consumptions, and reducing slag emission. Though the rate of the lime dissolution affects the rate for removing phosphorus from hot metal,1–9) a part of the lime added as a flux still remains without dissolution after the refining. Therefore, it is required to increase the dissolution rate of quicklime. Many researchers have measured the dissolution rates of various solid oxides.10–17) Matsushima et al. determined the dissolution rate of lime in the molten slag by recording the decrease in diameter of an immersed and rotating sintered lime rod.10) They reported that the dissolution rates increased with the increases in each, the relative velocity between lime and the molten slag, the difference of the CaO content between the slag and the interfacial phase, and in Effect of CO2 Content in Quicklime on Dissolution Rate of Quicklime in Steelmaking Slags

Effect of CO<sub>2</sub> Content in Quicklime on Dissolution Rate of Quicklime in Steelmaking Slags